Under the background of‘the Belt and Road’and‘China-Mongolia-Russia Economic Corridor’initiatives,this paper studied the urban accessibility level,regional accessibility pattern and regional spatial effects along ...Under the background of‘the Belt and Road’and‘China-Mongolia-Russia Economic Corridor’initiatives,this paper studied the urban accessibility level,regional accessibility pattern and regional spatial effects along the Primorsky No.1 and No.2 transportation corridors.First,the evaluation of urban accessibility level with and without Primorsky No.1 and No.2 high-speed rails(HSRs)opening was conducted with two indicators,i.e.,the weighted average travel time,and the economic potential.After the evaluation,the spatial differentiation pattern of the accessibility changes with and without Primorsky No.1 and No.2 HSRs opening was performed respectively using ArcGIS.On these bases,the regional spatial effects brought by Primorsky No.1 and No.2 HSRs opening were studied.The results are as following.First,the urban accessibility level will be greatly improved by the opening of Primorsky No.1 and No.2 HSRs.All adjacent cities will be integrated into‘1 h HSR communication circle’and the whole journey will be integrated into‘4 h HSR communication circle’along Primorsky No.1 and No.2 corridors,respectively.The HSR accessibility of Primorsky No.1 corridor is stronger than that of Primorsky No.2 corridor.But the HSR accessibility improvement degree of Primorsky No.1 corridor is weaker than that of Primorsky No.2 corridor.Second,spatially,along Primorsky No.1 and No.2 corridors,the HSR accessibility level of the cities which are located in China is stronger than those cities located in Russia,showing the‘High West,Low East’patterns.The HSR accessibility improvement degree of the cities which are located in Russia and Sino-Russian border is stronger than those cities located in China,showing the‘High East,Low West’patterns.Third,Primorsky No.1 and No.2 corridors could connect the China’s‘Heilongjiang Land Sea Silk Road Economic Belt’and‘Changchun-Jilin-Tumen Development Pilot Zone’respectively,gradually involving into the development of China’s Harbin-Changchun Megalopolis.Relying on Harbin(China)and Changchun(China),Primorsky No.1 and No.2 HSRs could connect Northeast China-Beijing HSR,accelerating the diffusion of population,economy and other flows from China’s Beijing-Tianjin-Hebei Urban Agglomeration to Northeast China,and then to Russia’s Far East Federal District.Relying on Suifenhe(China)and Hunchun(China),Primorsky No.1 and No.2 HSRs could be conducive to the development of the second largest sea channels for Northeast China,creating the Northeast Asian Urban Belt,and new sea-rail intermodal pattern among China,Russia,Democratic People’s Republic of Korea,Japan and Republic of Korea.Relying on Vladivostok(Russia)and Zarubino(Russia),Primorsky No.1 and No.2 corridors could connect the‘Ice Silk Road’,building the‘Sino-Russian Northern Maritime Corridor’and‘Sino-Russian Arctic Blue Economic Areas’.展开更多
As carrier aircraft sortie frequency and flight deck operational density increase,autonomous dispatch trajectory planning for carrier-based vehicles demands efficient,safe,and kinematically feasible solutions.This pap...As carrier aircraft sortie frequency and flight deck operational density increase,autonomous dispatch trajectory planning for carrier-based vehicles demands efficient,safe,and kinematically feasible solutions.This paper presents an Iterative Safe Dispatch Corridor(iSDC)framework,addressing the suboptimality of the traditional SDC method caused by static corridor construction and redundant obstacle exploration.First,a Kinodynamic-Informed-Bidirectional Rapidly-exploring Random Tree Star(KIBRRT^(*))algorithm is proposed for the front-end coarse planning.By integrating bidirectional tree expansion,goal-biased elliptical sampling,and artificial potential field guidance,it reduces unnecessary exploration near concave obstacles and generates kinematically admissible paths.Secondly,the traditional SDC is implemented in an iterative manner,and the obtained trajectory in the current iteration is fed into the next iteration for corridor generation,thus progressively improving the quality of withincorridor constraints.For tractors,a reverse-motion penalty function is incorporated into the back-end optimizer to prioritize forward driving,aligning with mechanical constraints and human operational preferences.Numerical validations on the data of Gerald R.Ford-class carrier demonstrate that the KIBRRT^(*)reduces average computational time by 75%and expansion nodes by 25%compared to conventional RRT^(*)algorithms.Meanwhile,the iSDC framework yields more time-efficient trajectories for both carrier aircraft and tractors,with the dispatch time reduced by 31.3%and tractor reverse motion proportion decreased by 23.4%relative to traditional SDC.The presented framework offers a scalable solution for autonomous dispatch in confined and safety-critical environment,and an illustrative animation is available at bilibili.com/video/BV1tZ7Zz6Eyz.Moreover,the framework can be easily extended to three-dimension scenarios,and thus applicable for trajectory planning of aerial and underwater vehicles.展开更多
This year marks the 65th anniversary of diplomatic relations between China and Laos.As neighbors sharing a common border,the two nations are comrades and brothers.When China proposed the vision of building a community...This year marks the 65th anniversary of diplomatic relations between China and Laos.As neighbors sharing a common border,the two nations are comrades and brothers.When China proposed the vision of building a community with a shared future for humanity,Laos became the first to reach political consensus on establishing such a bilateral community with China.展开更多
In this paper,the Jiangxi section of the red army's long march is taken as the research object to construct a red cultural heritage corridor.Introducing the theory of heritage corridor,on the basis of its hierarch...In this paper,the Jiangxi section of the red army's long march is taken as the research object to construct a red cultural heritage corridor.Introducing the theory of heritage corridor,on the basis of its hierarchical decomposition and comparative judgment,a hierarchy model of the red cultural heritage corridor resource is established.The comprehensive scores of each factor are obtained through expert scoring,and the overall pattern of red army corridor is constructed as"ring-shape-point".New ideas for protection and utilization as well as protection implementation measures are proposed,and the spiritual and cultural connotations of long march in Jiangxi are fully explored.This could help the social and economic development of the areas along the long march of red army in Jiangxi,and promote the integrated utilization and coordinated development of resources in the red cultural heritage corridor region.展开更多
This retrospective study explores the transformation of the China-Myanmar Economic Corridor(CMEC)from a material-driven“economic corridor”into a multidimensional“cultural corridor.”Drawing on the theoretical frame...This retrospective study explores the transformation of the China-Myanmar Economic Corridor(CMEC)from a material-driven“economic corridor”into a multidimensional“cultural corridor.”Drawing on the theoretical frameworks of transborder regionalism and cultural corridor theory,the paper reconstructs the evolution of Yunnan-Myanmar cross-border interaction from historical,institutional,and humanistic perspectives.Through an analysis of major infrastructure projects,educational cooperation,and cultural industries,the study demonstrates how spatial connectivity has gradually facilitated social embeddedness and cultural interflow.Findings indicate that economic connectivity constitutes the material foundation of humanistic exchange,while cultural interaction extends and deepens the corridor’s social dimension.The synergy between policy guidance and grassroots participation has enabled Yunnan to act as both a national executor and a local innovator in shaping transborder cooperation.The study further argues that the emergence of a cultural corridor represents a new model of regional coexistence-linking physical space with human networks and integrating economic growth with cultural trust.The research contributes to the understanding of cross-border governance and China-ASEAN cultural collaboration by proposing three policy implications:(1)constructing multi-level cultural cooperation networks;(2)promoting co-creation and innovation in the cultural and creative sectors;and(3)enhancing institutional support for sustainable humanistic governance.It concludes that the CMEC’s long-term significance lies not only in material connectivity but in its capacity to foster mutual understanding,social resilience,and a shared regional identity.展开更多
Generating dynamically feasible trajectory for fixed-wing Unmanned Aerial Vehicles(UAVs)in dense obstacle environments remains computationally intractable.This paper proposes a Safe Flight Corridor constrained Sequent...Generating dynamically feasible trajectory for fixed-wing Unmanned Aerial Vehicles(UAVs)in dense obstacle environments remains computationally intractable.This paper proposes a Safe Flight Corridor constrained Sequential Convex Programming(SFC-SCP)to improve the computation efficiency and reliability of trajectory generation.SFC-SCP combines the front-end convex polyhedron SFC construction and back-end SCP-based trajectory optimization.A Sparse A^(*)Search(SAS)driven SFC construction method is designed to efficiently generate polyhedron SFC according to the geometric relation among obstacles and collision-free waypoints.Via transforming the nonconvex obstacle-avoidance constraints to linear inequality constraints,SFC can mitigate infeasibility of trajectory planning and reduce computation complexity.Then,SCP casts the nonlinear trajectory optimization subject to SFC into convex programming subproblems to decrease the problem complexity.In addition,a convex optimizer based on interior point method is customized,where the search direction is calculated via successive elimination to further improve efficiency.Simulation experiments on dense obstacle scenarios show that SFC-SCP can generate dynamically feasible safe trajectory rapidly.Comparative studies with state-of-the-art SCP-based methods demonstrate the efficiency and reliability merits of SFC-SCP.Besides,the customized convex optimizer outperforms off-the-shelf optimizers in terms of computation time.展开更多
Carbon fluxes are essential indicators assessing vegetation carbon cycle functions.However,the extent and mechanisms by which climate change and human activities influence the spatiotemporal dynamics of carbon fluxes ...Carbon fluxes are essential indicators assessing vegetation carbon cycle functions.However,the extent and mechanisms by which climate change and human activities influence the spatiotemporal dynamics of carbon fluxes in arid oasis and non-oasis area remains unclear.Here,we assessed and predicted the future effects of climate change and human activities on carbon fluxes in the Hexi Corridor.The results showed that the annual average gross primary productivity(GPP),net ecosystem productivity(NEP),and ecosystem respiration(Reco)in the Hexi Corridor oasis increased by 263.91 g C·m^(-2)·yr^(-1),118.45 g C·m^(-2)·yr^(-1)and 122.46 g C·m^(-2)·yr^(-1),respectively,due to the expansion of the oasis area by 3424.84 km^(2) caused by human activities from 2000 to 2022.Both oasis and non-oasis arid ecosystems in the Hexi Corridor acted as carbon sinks.Compared to the non-oasis area,the carbon fluxes contributions of oasis area increased,ranging from 10.21%to 13.99%for GPP,8.50%to11.68%for NEP,and 13.34%to 17.13%for Reco.The contribution of the carbon flux from the oasis expansion area to the total carbon flux change in the Hexi Corridor was 30.96%(7.09 Tg C yr^(-1))for GPP,29.57%(3.39 Tg C yr^(-1))for NEP and 32.40%(3.58 Tg C yr^(-1))for Reco.The changes in carbon fluxes in the oasis area were mainly attributed to human activities(oasis expansion)and temperature,whereas non-oasis area was mainly due to climate factors.Moreover,the future increasing trends were observed for GPP(64.99%),NEP(66.29%)and Reco(82.08%)in the Hexi Corridor.This study provides new insights into the regulatory mechanisms of carbon cycle in the arid oasis and non-oasis area.展开更多
Global climate warming has placed immense pressure on the ecological environment worldwide,and the ecological issues affecting the quality of the living environment have garnered widespread attention.In this context,t...Global climate warming has placed immense pressure on the ecological environment worldwide,and the ecological issues affecting the quality of the living environment have garnered widespread attention.In this context,the question of“how to effectively optimize regional ecological network patterns”has become one of the critical issues that urban and rural planning and ecological geography need to address.This study takes Huzhou,Zhejiang Province,China,as the research area,and uses a combination of landscape type transition matrices and landscape pattern indices to analyze the evolution characteristics of green space landscape patterns from 2017 to 2022.Through geographical detectors and GBDT(Gradient Boosting Decision Tree)algorithms,the study explores the driving factors behind the changes in green space landscape patterns.Based on MSPA(Morphological Spatial Pattern Analysis),key ecological sources in Huzhou are extracted.Using a combination of resistance surfaces and gravity models,ecological corridors and networks are constructed.The study also provides suggestions for the evaluation and optimization of ecological network patterns.The aim is to summarize generalizable patterns of green space landscape evolution and methods for constructing and optimizing regional ecological corridor networks,offering insights and references for the improvement of the living environment and the construction of ecological civilization.展开更多
The Inner Asian Mountain Corridor(IAMC)acted as a crossroads of trans-Eurasian exchange since approximately 6000 cal.yr BP.The history of the introduction and utilization of crops and livestock in the area has been in...The Inner Asian Mountain Corridor(IAMC)acted as a crossroads of trans-Eurasian exchange since approximately 6000 cal.yr BP.The history of the introduction and utilization of crops and livestock in the area has been intensively discussed,while geographical-temporal variations of human activities and subsistence strategies remain unclear.Here we report new zooarchaeological data and radiocarbon dates from the Naba Cemeteries,revealing herbivorous livestock were predominant animal resource during both the Bronze and Early Iron Ages,and sheep/goat and horse were paramount sacrificial animals in these two periods,respectively.In tandem with published radiocarbon dates,zooarchaeological and archaeobotanical data from IAMC's prehistoric sites,we detect humans mainly engaged in hunting-gathering games in the IAMC during 8000-5000 cal.yr BP.During 5000-4000 cal.yr BP,the territory of agro-pastoral groups evidently expanded in the IAMC with a hotspot in the Altai Region,and wheat and barley were introduced into the area.In the following two millennia,herding became an economic mainstay,and cultivations of crops were ubiquitous in the IAMC's oases.We argue that prehistoric human activities in the IAMC were mainly affected by agro-pastoral expansions associated with exchanges across the Eurasia,which was likely promoted by climate change.展开更多
Urban traffic congestion is a significant challenge that contributes to high-density environments in urban areas,adversely impacting the living conditions of urban residents.The concept of urban renewal introduces new...Urban traffic congestion is a significant challenge that contributes to high-density environments in urban areas,adversely impacting the living conditions of urban residents.The concept of urban renewal introduces new requirements and challenges pertaining to urban transportation issues.To mitigate urban traffic congestion,enhance the greening rate of the city,and improve the urban environment,the concept of developing urban aerial ecological corridors is proposed.An analysis of the current state of various urban aerial corridors in different cities indicates that aerial ecological corridors effectively enhance connectivity and accessibility between different spaces,representing a significant strategy for addressing the issue of urban traffic congestion.Aerial ecological corridors have the potential to enhance the vertical space within urban environments,increase the greening rate of cities,and promote the physical and mental health of urban residents.Additionally,these corridors can improve the connectivity of habitat patches and address the developmental needs of biodiversity.Consequently,they serve as a crucial foundation for guiding the future transformation of urban development towards a healthier and greener direction.展开更多
The China-Myanmar Economic Corridor,as a key component of the Belt and Road Initiative,has profoundly influenced Myanmar's economic and social development,creating new opportunities for its private education secto...The China-Myanmar Economic Corridor,as a key component of the Belt and Road Initiative,has profoundly influenced Myanmar's economic and social development,creating new opportunities for its private education sector.This study conducts a literature review to systematically examine the development trajectory of Myanmar's private education industry under the corridor framework,focusing on impacts from investment,talent demand,educational exchange,and regional disparities.Findings indicate that corridor construction has driven sectoral growth through Chinese capital inflows,adjustments in academic programs to meet technical talent needs,and enhanced internationalization via Sino-Myanmar cooperation.However,challenges including policy gaps,resource imbalances,and quality regulation persist.The study provides theoretical and practical references for Sino-Myanmar educational collaboration and private education policy,advocating for strengthened cooperation to promote sustainable development in Myanmar's private education sector within the Belt and Road context.展开更多
Chongqing,a dazzling,sleepless metropolis renowned for its unique topography and cuisine,is also a key hub of the New International Land-Sea Trade Corridor.From December 9 to 11,the 2025 Annual Meeting of the Alliance...Chongqing,a dazzling,sleepless metropolis renowned for its unique topography and cuisine,is also a key hub of the New International Land-Sea Trade Corridor.From December 9 to 11,the 2025 Annual Meeting of the Alliance of the Chambers of Commerce and Industry of the New International Land-Sea Trade Corridor was held in Chongqing.Under the theme"Building the Corridor for Shared Development and Prosperity",the meeting brought together 21foreign chambers of commerce from 18 countries and regions,more than 90 Chinese enterprises and institutions,and over 500 businessleaders from China and abroad.展开更多
Long-term regional extreme cold events(ECEs)garner significant attention due to their widespread impact and prolonged duration,posing critical threats to human society and ecosystems.Previous studies have examined ECE...Long-term regional extreme cold events(ECEs)garner significant attention due to their widespread impact and prolonged duration,posing critical threats to human society and ecosystems.Previous studies have examined ECE characteristics at single sites or grid points,however,it is crucial to recognize that such events generally manifest as spatiotemporally continuous regional phenomena.Here,we proposed an objective methodology based on spatiotemporal continuity to identify ECEs in the China-Pakistan Economic Corridor(CPEC)during the winters of 1961-2015.This approach successfully reproduced the dynamic evolution of ECEs,encompassing their initiation,development,and dissipation.We further analyzed the changes of ECE intensity,frequency,and duration,and assessed ECE trends within varying return periods by employing the generalized Pareto distribution(GPD).Our findings reveal a decline in the frequency and duration of ECEs in CPEC over the study period,while their intensity has increased by 50%.ECEs predominantly occur in the northern regions of Azad Kashmir and Balochistan’s Quetta in Pakistan,and Kashgar in China.High recurrence levels are associated with an expansion of ECE-prone areas,particularly in the northern Pamir Plateau,which emerges as a regional hotspot.These results highlight the critical need to remain vigilant to potential future surges in ECEs under global warming,underscoring their implications for regional climate resilience.展开更多
Most of the existing non-line-of-sight(NLOS)localization methods depend on the layout information of the scene which is difficult to be obtained in advance in the practical application scenarios.To solve the problem,a...Most of the existing non-line-of-sight(NLOS)localization methods depend on the layout information of the scene which is difficult to be obtained in advance in the practical application scenarios.To solve the problem,an NLOS target localization method in unknown L-shaped corridor based ultra-wideband(UWB)multiple-input multiple-output(MIMO)radar is proposed in this paper.Firstly,the multipath propagation model of Lshaped corridor is established.Then,the localization process is analyzed by the propagation characteristics of diffraction and reflection.Specifically,two different back-projection imaging processes are performed on the radar echo,and the positions of focus regions in the two images are extracted to generate candidate targets.Furthermore,the distances of propagation paths corresponding to each candidate target are calculated,and then the similarity between each candidate target and the target is evaluated by employing two matching factors.The locations of the targets and the width of the corridor are determined based on the matching rules.Finally,two experiments are carried out to demonstrate that the method can effectively obtain the target positions and unknown scene information even when partial paths are lost.展开更多
Using fog meteorological data of five stations of Wuwei in east of Hexi Corridor from 1961 to 2008,geography distribution and climate characteristic of fog were analyzed with statistical method.The results showed that...Using fog meteorological data of five stations of Wuwei in east of Hexi Corridor from 1961 to 2008,geography distribution and climate characteristic of fog were analyzed with statistical method.The results showed that fog had the obvious region characteristic,fog days were more in mountainous area than Sichuan area and were more in south than north.Fog assumed reducing tendency year by year.Fog occurring frequency was the highest from July to October in one year.Fog occurring centralized time was form 20:00 to next day 08:00 in one day.Selecting of ECMWF numerical forecast grid field,factor was initially elected with Press criterion,factor was selected with stepwise regression forecast method.The fog forecasting equation was built with optimal subset regression.The overall situation and the most superior significance equations of fog forecasting were ascertained finally for spring,summer and autumn.Fitting rate three seasonal forecasting equation were 85.5%,82.1% and 81.2% respectively,which would provide objective and effective instruction products for forecasting service.展开更多
The general situation of planning and construction project for Agroecological parks in ecological corridor was introduced and its planning orientation or guiding ideology was also analyzed.Furthermore,countermeasures ...The general situation of planning and construction project for Agroecological parks in ecological corridor was introduced and its planning orientation or guiding ideology was also analyzed.Furthermore,countermeasures and suggestions for planning and construction of Agroecological parks in ecological corridor were proposed.展开更多
[Objective] The aim was to explore the spatial and temporal distribution characteristics of wind energy resource and preservation in central and west area of Hexi Corridor. [Method] By dint of the wind speed data from...[Objective] The aim was to explore the spatial and temporal distribution characteristics of wind energy resource and preservation in central and west area of Hexi Corridor. [Method] By dint of the wind speed data from 1955 to 2007 in ten meteorological observation station in central and west area of Hexi Corridor,and special wind tower fine data from January to December in 2007,the distribution and reserves of the region＇s wind energy resources were studied. [Result] The results showed that environmental wind speed was relatively stable in central and west Hexi Corridor. There were no distinct changes in climate characteristics distribution. There were regional differences in the distribution of wind energy,and there was a large numerical area of wind energy in Gazhou County and Yumen City; Wind energy in the region generally was higher. The wind energy density was above 100 w/m2 in the 10 m layer,around 140 w/m2 in most places,and was more than 200 w/m2 in the large number area. The wind grew in vertical direction along with the linear growth of height. Each 10 m high wind increased to 15 w/m2 averagely,50m layer wind energy was greater than the general 240 w/m2 and there were obvious changes on daily and annual with wind energy in central and west area of Hexi Corridor. The duration from March to May was a wind energy-intensive stage,10m height from the ground in the wind around 10：00 in low-value. After growing from 11：00,it met the day largest number at 18：00,and then reduced gradually. Effective wind speed hours in the region in general were more than 6 200 h,and the value in the large areas was close to 7 600 h. [Conclusion] The study laid basis for the development and application of wind energy in central and west area of Hexi Corridor.展开更多
Cultural heritage of emperor's tomb of Wulingyuan Mausoleum lies in Xianyang which is located at north-central of Guanzhong Plain and which is the central area of Guanzhong-Tianshui economic development zone.With ...Cultural heritage of emperor's tomb of Wulingyuan Mausoleum lies in Xianyang which is located at north-central of Guanzhong Plain and which is the central area of Guanzhong-Tianshui economic development zone.With special geographical position and excellent location condition,it is the important tourism resource and archaeological remains in Shaanxi Province.By using relevant knowledge on tourism,in the perspective of development principle,necessity,feasibility,construction strategy and thought of top-quality tourism corridor with cultural heritage of emperor's tomb of Wulingyuan Mausoleum as theme experience,the author systematically explained the mode elements and value of experiential tourism products,and publicized the tourism resources to a certain extent.On the basis of publicity,the author strived to provide reference for the sustainable development of economy and ecology in this region.展开更多
The Maputo Development Corridor along the N4 toll road between the north-eastern provinces of South Africa and Maputo （the capital and main port of Mozambique） was initiated in 1996. A Development Corridor can be se...The Maputo Development Corridor along the N4 toll road between the north-eastern provinces of South Africa and Maputo （the capital and main port of Mozambique） was initiated in 1996. A Development Corridor can be seen as a concept to elevate an area to a certain level of development. One of the objectives of this project was investment in transport infrastructure in order to create an enabling environment for economic growth and development. The project is also in line with the 1995 Spatial Development Initiatives of the South African Government that attempt to improve investment in those areas were the greatest potential for growth exists. This paper addresses economic wealth creation within the broader region that the N4 toll road and the corridor currently serve. The research revealed that the areas closer to the N4 corridor had higher growth in terms of economic output as measured by Gross Valued Added than those further removed. There were a stronger correlation between growth in employment and proximity to the road corridor for the manufacturing, construction, trade and transport sectors. Analysis done also shows that income per capita has grown at a faster rate in areas closer to the corridor that areas further removed.展开更多
基金Under the auspices of Heilongjiang Provincial Natural Science Foundation of China(No.YQ2024D012),National Natural Science Foundation of China(No.42071162,42101165,42501220)。
文摘Under the background of‘the Belt and Road’and‘China-Mongolia-Russia Economic Corridor’initiatives,this paper studied the urban accessibility level,regional accessibility pattern and regional spatial effects along the Primorsky No.1 and No.2 transportation corridors.First,the evaluation of urban accessibility level with and without Primorsky No.1 and No.2 high-speed rails(HSRs)opening was conducted with two indicators,i.e.,the weighted average travel time,and the economic potential.After the evaluation,the spatial differentiation pattern of the accessibility changes with and without Primorsky No.1 and No.2 HSRs opening was performed respectively using ArcGIS.On these bases,the regional spatial effects brought by Primorsky No.1 and No.2 HSRs opening were studied.The results are as following.First,the urban accessibility level will be greatly improved by the opening of Primorsky No.1 and No.2 HSRs.All adjacent cities will be integrated into‘1 h HSR communication circle’and the whole journey will be integrated into‘4 h HSR communication circle’along Primorsky No.1 and No.2 corridors,respectively.The HSR accessibility of Primorsky No.1 corridor is stronger than that of Primorsky No.2 corridor.But the HSR accessibility improvement degree of Primorsky No.1 corridor is weaker than that of Primorsky No.2 corridor.Second,spatially,along Primorsky No.1 and No.2 corridors,the HSR accessibility level of the cities which are located in China is stronger than those cities located in Russia,showing the‘High West,Low East’patterns.The HSR accessibility improvement degree of the cities which are located in Russia and Sino-Russian border is stronger than those cities located in China,showing the‘High East,Low West’patterns.Third,Primorsky No.1 and No.2 corridors could connect the China’s‘Heilongjiang Land Sea Silk Road Economic Belt’and‘Changchun-Jilin-Tumen Development Pilot Zone’respectively,gradually involving into the development of China’s Harbin-Changchun Megalopolis.Relying on Harbin(China)and Changchun(China),Primorsky No.1 and No.2 HSRs could connect Northeast China-Beijing HSR,accelerating the diffusion of population,economy and other flows from China’s Beijing-Tianjin-Hebei Urban Agglomeration to Northeast China,and then to Russia’s Far East Federal District.Relying on Suifenhe(China)and Hunchun(China),Primorsky No.1 and No.2 HSRs could be conducive to the development of the second largest sea channels for Northeast China,creating the Northeast Asian Urban Belt,and new sea-rail intermodal pattern among China,Russia,Democratic People’s Republic of Korea,Japan and Republic of Korea.Relying on Vladivostok(Russia)and Zarubino(Russia),Primorsky No.1 and No.2 corridors could connect the‘Ice Silk Road’,building the‘Sino-Russian Northern Maritime Corridor’and‘Sino-Russian Arctic Blue Economic Areas’.
基金support of the National Key Research and Development Plan(Grant No.2021YFB3302501)the financial support of the National Science Foundation of China(Grant No.12161076)the financial support of the Fundamental Research Funds for the Central Universities(Grant No.DUT24LAB129).
文摘As carrier aircraft sortie frequency and flight deck operational density increase,autonomous dispatch trajectory planning for carrier-based vehicles demands efficient,safe,and kinematically feasible solutions.This paper presents an Iterative Safe Dispatch Corridor(iSDC)framework,addressing the suboptimality of the traditional SDC method caused by static corridor construction and redundant obstacle exploration.First,a Kinodynamic-Informed-Bidirectional Rapidly-exploring Random Tree Star(KIBRRT^(*))algorithm is proposed for the front-end coarse planning.By integrating bidirectional tree expansion,goal-biased elliptical sampling,and artificial potential field guidance,it reduces unnecessary exploration near concave obstacles and generates kinematically admissible paths.Secondly,the traditional SDC is implemented in an iterative manner,and the obtained trajectory in the current iteration is fed into the next iteration for corridor generation,thus progressively improving the quality of withincorridor constraints.For tractors,a reverse-motion penalty function is incorporated into the back-end optimizer to prioritize forward driving,aligning with mechanical constraints and human operational preferences.Numerical validations on the data of Gerald R.Ford-class carrier demonstrate that the KIBRRT^(*)reduces average computational time by 75%and expansion nodes by 25%compared to conventional RRT^(*)algorithms.Meanwhile,the iSDC framework yields more time-efficient trajectories for both carrier aircraft and tractors,with the dispatch time reduced by 31.3%and tractor reverse motion proportion decreased by 23.4%relative to traditional SDC.The presented framework offers a scalable solution for autonomous dispatch in confined and safety-critical environment,and an illustrative animation is available at bilibili.com/video/BV1tZ7Zz6Eyz.Moreover,the framework can be easily extended to three-dimension scenarios,and thus applicable for trajectory planning of aerial and underwater vehicles.
文摘This year marks the 65th anniversary of diplomatic relations between China and Laos.As neighbors sharing a common border,the two nations are comrades and brothers.When China proposed the vision of building a community with a shared future for humanity,Laos became the first to reach political consensus on establishing such a bilateral community with China.
基金Supported by the Humanities and Social Science Research Project of Jiangxi Provincial Universities(YS23104).
文摘In this paper,the Jiangxi section of the red army's long march is taken as the research object to construct a red cultural heritage corridor.Introducing the theory of heritage corridor,on the basis of its hierarchical decomposition and comparative judgment,a hierarchy model of the red cultural heritage corridor resource is established.The comprehensive scores of each factor are obtained through expert scoring,and the overall pattern of red army corridor is constructed as"ring-shape-point".New ideas for protection and utilization as well as protection implementation measures are proposed,and the spiritual and cultural connotations of long march in Jiangxi are fully explored.This could help the social and economic development of the areas along the long march of red army in Jiangxi,and promote the integrated utilization and coordinated development of resources in the red cultural heritage corridor region.
文摘This retrospective study explores the transformation of the China-Myanmar Economic Corridor(CMEC)from a material-driven“economic corridor”into a multidimensional“cultural corridor.”Drawing on the theoretical frameworks of transborder regionalism and cultural corridor theory,the paper reconstructs the evolution of Yunnan-Myanmar cross-border interaction from historical,institutional,and humanistic perspectives.Through an analysis of major infrastructure projects,educational cooperation,and cultural industries,the study demonstrates how spatial connectivity has gradually facilitated social embeddedness and cultural interflow.Findings indicate that economic connectivity constitutes the material foundation of humanistic exchange,while cultural interaction extends and deepens the corridor’s social dimension.The synergy between policy guidance and grassroots participation has enabled Yunnan to act as both a national executor and a local innovator in shaping transborder cooperation.The study further argues that the emergence of a cultural corridor represents a new model of regional coexistence-linking physical space with human networks and integrating economic growth with cultural trust.The research contributes to the understanding of cross-border governance and China-ASEAN cultural collaboration by proposing three policy implications:(1)constructing multi-level cultural cooperation networks;(2)promoting co-creation and innovation in the cultural and creative sectors;and(3)enhancing institutional support for sustainable humanistic governance.It concludes that the CMEC’s long-term significance lies not only in material connectivity but in its capacity to foster mutual understanding,social resilience,and a shared regional identity.
基金supported by the National Natural Science Foundation of China(No.62203256)。
文摘Generating dynamically feasible trajectory for fixed-wing Unmanned Aerial Vehicles(UAVs)in dense obstacle environments remains computationally intractable.This paper proposes a Safe Flight Corridor constrained Sequential Convex Programming(SFC-SCP)to improve the computation efficiency and reliability of trajectory generation.SFC-SCP combines the front-end convex polyhedron SFC construction and back-end SCP-based trajectory optimization.A Sparse A^(*)Search(SAS)driven SFC construction method is designed to efficiently generate polyhedron SFC according to the geometric relation among obstacles and collision-free waypoints.Via transforming the nonconvex obstacle-avoidance constraints to linear inequality constraints,SFC can mitigate infeasibility of trajectory planning and reduce computation complexity.Then,SCP casts the nonlinear trajectory optimization subject to SFC into convex programming subproblems to decrease the problem complexity.In addition,a convex optimizer based on interior point method is customized,where the search direction is calculated via successive elimination to further improve efficiency.Simulation experiments on dense obstacle scenarios show that SFC-SCP can generate dynamically feasible safe trajectory rapidly.Comparative studies with state-of-the-art SCP-based methods demonstrate the efficiency and reliability merits of SFC-SCP.Besides,the customized convex optimizer outperforms off-the-shelf optimizers in terms of computation time.
基金The Foundation for Distinguished Young Scholars of Gansu Province,No.22JR5RA046Key Research Program of Gansu Province,No.23ZDKA0004+2 种基金The Joint Funds of the National Natural Science Foundation of China,No.U22A202690Interdisciplinary Youth Team Project from the Key Laboratory of Cryospheric Science and Frozen Soil Engineering,No.CSFSE-ZQ-2408The Youth Innovation Promotion Association CAS to X.W.,No.2020422。
文摘Carbon fluxes are essential indicators assessing vegetation carbon cycle functions.However,the extent and mechanisms by which climate change and human activities influence the spatiotemporal dynamics of carbon fluxes in arid oasis and non-oasis area remains unclear.Here,we assessed and predicted the future effects of climate change and human activities on carbon fluxes in the Hexi Corridor.The results showed that the annual average gross primary productivity(GPP),net ecosystem productivity(NEP),and ecosystem respiration(Reco)in the Hexi Corridor oasis increased by 263.91 g C·m^(-2)·yr^(-1),118.45 g C·m^(-2)·yr^(-1)and 122.46 g C·m^(-2)·yr^(-1),respectively,due to the expansion of the oasis area by 3424.84 km^(2) caused by human activities from 2000 to 2022.Both oasis and non-oasis arid ecosystems in the Hexi Corridor acted as carbon sinks.Compared to the non-oasis area,the carbon fluxes contributions of oasis area increased,ranging from 10.21%to 13.99%for GPP,8.50%to11.68%for NEP,and 13.34%to 17.13%for Reco.The contribution of the carbon flux from the oasis expansion area to the total carbon flux change in the Hexi Corridor was 30.96%(7.09 Tg C yr^(-1))for GPP,29.57%(3.39 Tg C yr^(-1))for NEP and 32.40%(3.58 Tg C yr^(-1))for Reco.The changes in carbon fluxes in the oasis area were mainly attributed to human activities(oasis expansion)and temperature,whereas non-oasis area was mainly due to climate factors.Moreover,the future increasing trends were observed for GPP(64.99%),NEP(66.29%)and Reco(82.08%)in the Hexi Corridor.This study provides new insights into the regulatory mechanisms of carbon cycle in the arid oasis and non-oasis area.
基金Major Program of National Fund of Philosophy and Social Science of China(24&ZD148).
文摘Global climate warming has placed immense pressure on the ecological environment worldwide,and the ecological issues affecting the quality of the living environment have garnered widespread attention.In this context,the question of“how to effectively optimize regional ecological network patterns”has become one of the critical issues that urban and rural planning and ecological geography need to address.This study takes Huzhou,Zhejiang Province,China,as the research area,and uses a combination of landscape type transition matrices and landscape pattern indices to analyze the evolution characteristics of green space landscape patterns from 2017 to 2022.Through geographical detectors and GBDT(Gradient Boosting Decision Tree)algorithms,the study explores the driving factors behind the changes in green space landscape patterns.Based on MSPA(Morphological Spatial Pattern Analysis),key ecological sources in Huzhou are extracted.Using a combination of resistance surfaces and gravity models,ecological corridors and networks are constructed.The study also provides suggestions for the evaluation and optimization of ecological network patterns.The aim is to summarize generalizable patterns of green space landscape evolution and methods for constructing and optimizing regional ecological corridor networks,offering insights and references for the improvement of the living environment and the construction of ecological civilization.
基金The NSFC-INSF Joint Research Project,No.42261144670The Second Tibetan Plateau Scientific Expedition and Research Program,No.2019QZKK0601。
文摘The Inner Asian Mountain Corridor(IAMC)acted as a crossroads of trans-Eurasian exchange since approximately 6000 cal.yr BP.The history of the introduction and utilization of crops and livestock in the area has been intensively discussed,while geographical-temporal variations of human activities and subsistence strategies remain unclear.Here we report new zooarchaeological data and radiocarbon dates from the Naba Cemeteries,revealing herbivorous livestock were predominant animal resource during both the Bronze and Early Iron Ages,and sheep/goat and horse were paramount sacrificial animals in these two periods,respectively.In tandem with published radiocarbon dates,zooarchaeological and archaeobotanical data from IAMC's prehistoric sites,we detect humans mainly engaged in hunting-gathering games in the IAMC during 8000-5000 cal.yr BP.During 5000-4000 cal.yr BP,the territory of agro-pastoral groups evidently expanded in the IAMC with a hotspot in the Altai Region,and wheat and barley were introduced into the area.In the following two millennia,herding became an economic mainstay,and cultivations of crops were ubiquitous in the IAMC's oases.We argue that prehistoric human activities in the IAMC were mainly affected by agro-pastoral expansions associated with exchanges across the Eurasia,which was likely promoted by climate change.
基金Sponsored by Research Team Project of Anhui Xinhua University(kytd202202)Anhui Provincial Undergraduate Innovation Training Program(S202212216146,S202212216133,S202212216138,AH202112216114)Key Project of Anhui Provincial Higher Education Scientific Research Project(Natural Science)(2022AH051861,2024AH050601).
文摘Urban traffic congestion is a significant challenge that contributes to high-density environments in urban areas,adversely impacting the living conditions of urban residents.The concept of urban renewal introduces new requirements and challenges pertaining to urban transportation issues.To mitigate urban traffic congestion,enhance the greening rate of the city,and improve the urban environment,the concept of developing urban aerial ecological corridors is proposed.An analysis of the current state of various urban aerial corridors in different cities indicates that aerial ecological corridors effectively enhance connectivity and accessibility between different spaces,representing a significant strategy for addressing the issue of urban traffic congestion.Aerial ecological corridors have the potential to enhance the vertical space within urban environments,increase the greening rate of cities,and promote the physical and mental health of urban residents.Additionally,these corridors can improve the connectivity of habitat patches and address the developmental needs of biodiversity.Consequently,they serve as a crucial foundation for guiding the future transformation of urban development towards a healthier and greener direction.
基金funded by the following research funds:1.2025 Open Research Project of the Institute of Area Studies and Overseas Chinese Studies,Shantou University(25STUQYGB10)2.Open Project of the Research Center for the International Communication of Chinese Culture,Shantou University(24STUZHWH02)。
文摘The China-Myanmar Economic Corridor,as a key component of the Belt and Road Initiative,has profoundly influenced Myanmar's economic and social development,creating new opportunities for its private education sector.This study conducts a literature review to systematically examine the development trajectory of Myanmar's private education industry under the corridor framework,focusing on impacts from investment,talent demand,educational exchange,and regional disparities.Findings indicate that corridor construction has driven sectoral growth through Chinese capital inflows,adjustments in academic programs to meet technical talent needs,and enhanced internationalization via Sino-Myanmar cooperation.However,challenges including policy gaps,resource imbalances,and quality regulation persist.The study provides theoretical and practical references for Sino-Myanmar educational collaboration and private education policy,advocating for strengthened cooperation to promote sustainable development in Myanmar's private education sector within the Belt and Road context.
文摘Chongqing,a dazzling,sleepless metropolis renowned for its unique topography and cuisine,is also a key hub of the New International Land-Sea Trade Corridor.From December 9 to 11,the 2025 Annual Meeting of the Alliance of the Chambers of Commerce and Industry of the New International Land-Sea Trade Corridor was held in Chongqing.Under the theme"Building the Corridor for Shared Development and Prosperity",the meeting brought together 21foreign chambers of commerce from 18 countries and regions,more than 90 Chinese enterprises and institutions,and over 500 businessleaders from China and abroad.
基金Under the auspices of the Key R&D Program of Xinjiang Uygur Autonomous Region(No.2022B03021)Tianshan Talent Training Program of Xinjiang Uygur Autonomous Region(No.2022TSYCLJ0011)+2 种基金Transformation of Scientific and Technological Achievements from the Qinghai Province(No.2020-SF-145)the 2020 Qinghai Kunlun Talents-leading Scientists Project(No.2020-LCJ-02)Key Program of International Cooperation,Bureau of International Cooperation,Chinese Academy of Sciences(No.131551KYSB20210030)。
文摘Long-term regional extreme cold events(ECEs)garner significant attention due to their widespread impact and prolonged duration,posing critical threats to human society and ecosystems.Previous studies have examined ECE characteristics at single sites or grid points,however,it is crucial to recognize that such events generally manifest as spatiotemporally continuous regional phenomena.Here,we proposed an objective methodology based on spatiotemporal continuity to identify ECEs in the China-Pakistan Economic Corridor(CPEC)during the winters of 1961-2015.This approach successfully reproduced the dynamic evolution of ECEs,encompassing their initiation,development,and dissipation.We further analyzed the changes of ECE intensity,frequency,and duration,and assessed ECE trends within varying return periods by employing the generalized Pareto distribution(GPD).Our findings reveal a decline in the frequency and duration of ECEs in CPEC over the study period,while their intensity has increased by 50%.ECEs predominantly occur in the northern regions of Azad Kashmir and Balochistan’s Quetta in Pakistan,and Kashgar in China.High recurrence levels are associated with an expansion of ECE-prone areas,particularly in the northern Pamir Plateau,which emerges as a regional hotspot.These results highlight the critical need to remain vigilant to potential future surges in ECEs under global warming,underscoring their implications for regional climate resilience.
基金supported by National Natural Science Foundation of China(U20B2070,62001091)Sichuan Science and Technology Program(2022YFS0531).
文摘Most of the existing non-line-of-sight(NLOS)localization methods depend on the layout information of the scene which is difficult to be obtained in advance in the practical application scenarios.To solve the problem,an NLOS target localization method in unknown L-shaped corridor based ultra-wideband(UWB)multiple-input multiple-output(MIMO)radar is proposed in this paper.Firstly,the multipath propagation model of Lshaped corridor is established.Then,the localization process is analyzed by the propagation characteristics of diffraction and reflection.Specifically,two different back-projection imaging processes are performed on the radar echo,and the positions of focus regions in the two images are extracted to generate candidate targets.Furthermore,the distances of propagation paths corresponding to each candidate target are calculated,and then the similarity between each candidate target and the target is evaluated by employing two matching factors.The locations of the targets and the width of the corridor are determined based on the matching rules.Finally,two experiments are carried out to demonstrate that the method can effectively obtain the target positions and unknown scene information even when partial paths are lost.
基金Supported by Key Research Project of Gansu Meteorological Bureau in 2007
文摘Using fog meteorological data of five stations of Wuwei in east of Hexi Corridor from 1961 to 2008,geography distribution and climate characteristic of fog were analyzed with statistical method.The results showed that fog had the obvious region characteristic,fog days were more in mountainous area than Sichuan area and were more in south than north.Fog assumed reducing tendency year by year.Fog occurring frequency was the highest from July to October in one year.Fog occurring centralized time was form 20:00 to next day 08:00 in one day.Selecting of ECMWF numerical forecast grid field,factor was initially elected with Press criterion,factor was selected with stepwise regression forecast method.The fog forecasting equation was built with optimal subset regression.The overall situation and the most superior significance equations of fog forecasting were ascertained finally for spring,summer and autumn.Fitting rate three seasonal forecasting equation were 85.5%,82.1% and 81.2% respectively,which would provide objective and effective instruction products for forecasting service.
文摘The general situation of planning and construction project for Agroecological parks in ecological corridor was introduced and its planning orientation or guiding ideology was also analyzed.Furthermore,countermeasures and suggestions for planning and construction of Agroecological parks in ecological corridor were proposed.
基金Supported by National Natural Science Fund (41075008)Chinese Meteorological Climate Changes Program (280200S011000)Gansu Meteorological Bureau Climate Science and Research Program(2011-09)~~
文摘[Objective] The aim was to explore the spatial and temporal distribution characteristics of wind energy resource and preservation in central and west area of Hexi Corridor. [Method] By dint of the wind speed data from 1955 to 2007 in ten meteorological observation station in central and west area of Hexi Corridor,and special wind tower fine data from January to December in 2007,the distribution and reserves of the region＇s wind energy resources were studied. [Result] The results showed that environmental wind speed was relatively stable in central and west Hexi Corridor. There were no distinct changes in climate characteristics distribution. There were regional differences in the distribution of wind energy,and there was a large numerical area of wind energy in Gazhou County and Yumen City; Wind energy in the region generally was higher. The wind energy density was above 100 w/m2 in the 10 m layer,around 140 w/m2 in most places,and was more than 200 w/m2 in the large number area. The wind grew in vertical direction along with the linear growth of height. Each 10 m high wind increased to 15 w/m2 averagely,50m layer wind energy was greater than the general 240 w/m2 and there were obvious changes on daily and annual with wind energy in central and west area of Hexi Corridor. The duration from March to May was a wind energy-intensive stage,10m height from the ground in the wind around 10：00 in low-value. After growing from 11：00,it met the day largest number at 18：00,and then reduced gradually. Effective wind speed hours in the region in general were more than 6 200 h,and the value in the large areas was close to 7 600 h. [Conclusion] The study laid basis for the development and application of wind energy in central and west area of Hexi Corridor.
基金Supported by Financial Project of Shaanxi Province Key Disciplines:Key Supported Discipline of History and Geography (Landscape Lay-out and Cultural Tourism Development of Wulingyuan Mausoleum)the Financial Project of Shaanxi (College) Philosophy and Social Key Research Base Science -Guanzhong Ancient Mausoleum Culture Research Center~~
文摘Cultural heritage of emperor's tomb of Wulingyuan Mausoleum lies in Xianyang which is located at north-central of Guanzhong Plain and which is the central area of Guanzhong-Tianshui economic development zone.With special geographical position and excellent location condition,it is the important tourism resource and archaeological remains in Shaanxi Province.By using relevant knowledge on tourism,in the perspective of development principle,necessity,feasibility,construction strategy and thought of top-quality tourism corridor with cultural heritage of emperor's tomb of Wulingyuan Mausoleum as theme experience,the author systematically explained the mode elements and value of experiential tourism products,and publicized the tourism resources to a certain extent.On the basis of publicity,the author strived to provide reference for the sustainable development of economy and ecology in this region.
文摘The Maputo Development Corridor along the N4 toll road between the north-eastern provinces of South Africa and Maputo （the capital and main port of Mozambique） was initiated in 1996. A Development Corridor can be seen as a concept to elevate an area to a certain level of development. One of the objectives of this project was investment in transport infrastructure in order to create an enabling environment for economic growth and development. The project is also in line with the 1995 Spatial Development Initiatives of the South African Government that attempt to improve investment in those areas were the greatest potential for growth exists. This paper addresses economic wealth creation within the broader region that the N4 toll road and the corridor currently serve. The research revealed that the areas closer to the N4 corridor had higher growth in terms of economic output as measured by Gross Valued Added than those further removed. There were a stronger correlation between growth in employment and proximity to the road corridor for the manufacturing, construction, trade and transport sectors. Analysis done also shows that income per capita has grown at a faster rate in areas closer to the corridor that areas further removed.
