Purpose–This study summarizes the overall situation of the resources of the national science and technology innovation platform in the railway industry,including the distribution of platform types,supporting institut...Purpose–This study summarizes the overall situation of the resources of the national science and technology innovation platform in the railway industry,including the distribution of platform types,supporting institutions,construction sites,professional fields,etc.,to provide a reference for the further improvement and optimization of the national science and technology innovation platform system in the railway industry.Design/methodology/approach–Through literature review,field investigation,expert consultation and other methods,this paper systematically investigates and analyzes the development status of the national science and technology innovation platform in the railway industry.Findings–Taking the national science and technology innovation platform of the railway industry as the research object,this paper investigates and analyzes the construction,development and distribution of the national science and technology innovation platform of railway industry over the years.And the National Engineering Research Center of High-speed Railway and Urban Rail Transit System Technology was taken as an example to introduce its operation effect.Originality/value–China Railway has made great development achievements,with the construction and development of national science and technology innovation platform in the railway industry.In recent years,a large number of national science and technology innovation platforms have been built in the railway industry,which play an important role in railway technological innovation,standard setting and commodification,and Railway Sciences provide strong support for railway technology development.展开更多
China is tectonically composed of a series of plates and orogenic belts and has been influenced by the Pacific and Indian plates since the Late Paleozoic,forming a regular distribution of Mesozoic and Cenozoic granite...China is tectonically composed of a series of plates and orogenic belts and has been influenced by the Pacific and Indian plates since the Late Paleozoic,forming a regular distribution of Mesozoic and Cenozoic granites.As an important source of geothermal energy,granite is thefive elements of geothermal enrichment:geothermal sources;geothermal reservoirs;heat transmission;heat caprock;and heat preservation and it is possible to classify the types of geothermal resources in China according to their distribution in combination with neotectonic movements.China's geothermal energy can be divided into hydrothermal and hot dry rock types in basins and orogenic belts,respectively.Geothermal resources can be divided into hydrothermal,rock,magma,and hybrid geothermal types according to the heat carrier type.Basin geothermal resources are dominated by hydrothermal types,while geothermal energy in orogenic belts with granite includes both hydrothermal and hot dry rock types.Geothermal resources in China can be divided into 6 distinct geothermal regions and 13 subregions,of which the Southwest and Southeast China regions and the Qaidam-Qilian and Jiaoliao subregions in North China with Mesozoic and Cenozoic granites are the most favorable areas for high-temperature hydrothermal and hot dry rock sources.China has complex geological conditions,diverse types of geothermal resources,and broad prospects for development and utilization.Having performed extensive shallow hydrothermal geothermal development and utilization and completed various power generation tests,China's geothermal development and utilization is in a critical stage of transition from the direct utilization of shallow hydrothermal resources to high-temperature geothermal or hot dry rock power generation in middle and deep layers.Basic theoretical research,key technology breakthroughs,and policy incentives are the main issues that need to be addressed in the geothermal industry.展开更多
The Silk Road Economic Belt,as a major initiative for global economic cooperation in the 21st century,has evolved into a critical economic cooperation region linking the Eurasian continent and its neighboring countrie...The Silk Road Economic Belt,as a major initiative for global economic cooperation in the 21st century,has evolved into a critical economic cooperation region linking the Eurasian continent and its neighboring countries since it was proposed by the Chinese President in 2013.This paper explores the economic cooperation modes among countries along the Silk Road Economic Belt,analyzing its cooperation mechanisms,current development status,and future prospects.By examining the diversity and complexity of economic cooperation in this region,the paper highlights both its potential and challenges,providing theoretical support for advancing regional collaboration and achieving shared prosperity.展开更多
Under the background of a new round of transformation and upgrading of the marine fishery industrial structure and the"speed up and upgrading"of the national marine ranching,this paper uses the method of com...Under the background of a new round of transformation and upgrading of the marine fishery industrial structure and the"speed up and upgrading"of the national marine ranching,this paper uses the method of combining practical experience,literature review,and field research to describe the development of marine ranching at home and abroad,and summarizes the practice process and achievements of Tianjin marine ranch:one national and two provincial marine ranch demonstration areas,16 ecotype reef areas,one seafood demonstration area,and one floating fish reef demonstration area were built,with a total scale of 26.9 km^(2),and a total of 134900 m^(2) fish reefs.This paper emphatically analyzed the construction experience and characteristics of the Tianjin Dashentang Marine Ranch demonstration area.Combined with the development orientation and objectives of Tianjin marine ranch,it is proposed to unify understanding,perfect development concept,accelerate the pace of scientific research,and adhere to ecological priority.In future,the construction of Tianjin marine ranch should encourage innovation to achieve leap-forward development,explore a new model of fishery development based on the'Economic Union',with'marine ranching-ecological farming-leisure tourism-featured products'as the main body.Based on relevant experience at home and abroad,the industrialization model of marine ranch with Tianjin characteristics should be established,which aims to provide strong support for the construction of"blue granary"in Tianjin,the implementation of Tianjin's coastal ranching strategy,and the promotion of Tianjin coastal ecosystem reconstruction and fishery resource recovery.展开更多
In the past five years,shale gas exploration and development has grown in a leaping-forward way in China.Following USA and Canada,China is now the third country where industrial shale gas production is realized,with t...In the past five years,shale gas exploration and development has grown in a leaping-forward way in China.Following USA and Canada,China is now the third country where industrial shale gas production is realized,with the cumulative production exceeding 60×10^(8) m^(3) until the end of 2015.In this paper,the main achievements of shale gas exploration and development in China in recent years were reviewed and the future development prospect was analyzed.It is pointed out that shale gas exploration and development in China is,on the whole,still at its early stage.Especially,marine shale gas in the Sichuan Basin has dominated the recent exploration and development.For the realization of shale gas scale development in China,one key point lies in the breakthrough and industrial production of transitional facies and continental facies shale gas.Lowemoderate yield of shale gas wells is the normal in China,so it is crucial to develop key exploration and development technologies.Especially,strictly controlling single well investment and significantly reducing cost are the important means to increase shale gas exploration and development benefits.And finally,suggestions were proposed in five aspects.First,continuously strengthen theoretical and technical re-searches,actively carry out appraisal on shale gas“sweet spots”,and gradually accumulate development basis.Second,stress on primary evaluation of exploration and development,highlight the effective implementation of shale gas resources,and control the rhythm of appraisal drilling and productivity construction.Third,highlight fine description and evaluation of shale gas reservoirs and increase the overall devel-opment level.Fourth,intensify the research on exploration and development technologies in order to stand out simple and practical technologies with low costs.And fifth,summarize the experiences in fast growth of shale gas exploration and development,highlight the demonstration and evaluation of key indicators,and try to achieve more breakthroughs and replacement in new areas,new domains and new strata.展开更多
Microseismic source location is the essential factor in microseismic monitoring technology, and its loca- tion precision has a large impact on the performance of the technique. Here, we discuss the problem of low-prec...Microseismic source location is the essential factor in microseismic monitoring technology, and its loca- tion precision has a large impact on the performance of the technique. Here, we discuss the problem of low-precision location identification for microseismic events in a mine, as may be obtained using conven-tional location methods that are based on arrival time. In this paper, microseismic location characteristics in mining are analyzed according to the characteristics of the mine＇s microseismic wavefield. We review research progress in mine-related microseismic source location methods in recent years, including the combination of the Geiger method with the linear method, combined microseismic event location method, optimization of relative location method, location method without pre-measured velocity, and location method without arrival time picking. The advantages and disadvantages of these methods are discussed, along with their feasible conditions. The influences of geophone distribution, first arrival time picking, and the velocity model on microseismic source location are analyzed, and measures are proposed to influence these factors. Approaches to solve the problem under study include adopting information fusion, combining and optimizing existing methods, and creating new methods to realize high-precision microseismic source location. Optimization of the velocity structure, along with applications of the time-reversal imaging technique, passive time-reversal mirror, and relative interferometric imag-ing, are expected to greatly improve microseismic location precision in mines. This paper also discusses the potential application of information fusion and deep learning methods in microseismic source location in mines. These new and innovative location methods for microseismic source location have extensive prospects for development.展开更多
Quinoa is the only single plant meeting the basic nutritional needs of the human body. It is the whole nutritious food with nutritional balance, wide adaptability, strong resistance and other characteristics. In this ...Quinoa is the only single plant meeting the basic nutritional needs of the human body. It is the whole nutritious food with nutritional balance, wide adaptability, strong resistance and other characteristics. In this paper, the botanical characteristics and nutritional value of quinoa were systematically introduced, and the development of quinoa in China was reviewed. The problems of domestic quinoa industry, the shortage of germplasm resources, the lack of innovation and high-yielding cultivation techniques were analyzed. To provide theoretical references for quinoa planting and industrial development in China, the countermeasures to improve the investment of quinoa industry and promote the development of multi-form industry were put forward.展开更多
At present,natural gas accounts for a low proportion in China's primary energy consumption structure and is highly dependent on foreign sources.Changqing gas province of the Ordos Basin where PetroChina Changqing ...At present,natural gas accounts for a low proportion in China's primary energy consumption structure and is highly dependent on foreign sources.Changqing gas province of the Ordos Basin where PetroChina Changqing Oilfield Company(referred to as Changqing Oilfield)is located is one of China's four major natural gas production bases.It bears the important responsibility for ensuring people's livelihood and promoting the healthy development of society economy.In recent years,Changqing Oilfield actively implements national instructive spirit on vigorously promoting domestic oil and gas exploration and development strength and formulates the secondary acceleration development strategies.Its annual natural gas production in 2020 reaches 448.5×10^(8) m^(3) and oil and gas equivalent exceeds 6000×10^(4) t,tamping its important position of“Western Daqing”in this industry.In order to further promote the continuous stable production and realize the goal of quality and efficiency improvement in Changqing gas province,this paper analyzes the situations and challenges of natural gas development in this gas province,prepares the development technological countermeasures and forecast the natural gas development prospect.And the following research results are obtained.First,the natural gas exploration and development in Changqing gas province is divided into four stages and the main technologies for the development of low-permeability carbonate gas reservoir,low-permeability sandstone gas reservoir and tight sandstone gas reservoir are formed.Second,the natural gas development in Changqing gas province faces six challenges,such as low reserve production degree,sharp decline of production rates and complex distribution of remaining undeveloped reserves of developed gas fields.And twenty-six development technological countermeasures are put forward correspondingly,such as well pattern thickening,extension and reserve increase,secondary production layer potential tapping and fine gas well management.Third,the development direction and goal of natural gas development in Changqing gas province is to pay equal attention to the stable production of old gas fields and the production increase of new areas and carry out conventional gas and unconventional gas research simultaneously.In conclusion,the annual natural gas production of Changqing gas province will maintain a sound momentum of steady growth and will exceed 500×10^(8) m^(3) at the end of the 14th Five-Year Plan and maintain at a stable level for a long term,which is conducive to the optimization of domestic energy consumption structure and realization of“carbon peak and carbon neutrality”.展开更多
In order to better promote the sustainable,effective and rapid development of natural gas business and the on-schedule realization of“carbon peak and carbon neutrality”goal,this paper summarizes and reviews the achi...In order to better promote the sustainable,effective and rapid development of natural gas business and the on-schedule realization of“carbon peak and carbon neutrality”goal,this paper summarizes and reviews the achievements and experience in the development of natural gas industry in China.Then,the influence of energy environmental policies on the development of natural gas industry is analyzed,and domestic natural gas exploration and development situations are dissected.Finally,domestic natural gas exploration and development prospect is forecasted,and the corresponding development suggestions are proposed.And the following research results are obtained.First,under the commitment of the Paris Agreement and the strategy of carbon peak and carbon neutrality,China's natural gas industry faces unprecedented development opportunities.Second,domestic natural gas is characterized by abundant resource bases,low proven rate of resource and clear target and field of reserve and production increase,but the complexity of the resources and the rise of exploration and development cost make it more difficult to realize the large-scale efficient increase of natural gas production.Third,nevertheless,in order to ensure national energy security and reach the dual goals of economic development and environmental protection,China continues to powerfully enhance domestic oil and gas exploration and development.According to the growth trend of new proved gas reserves,it is predicted that the domestic new proved gas reserves by 2040 will be 16×10^(12)-20×10^(12) m^(3),the peak natural gas production of 2900×108-3300×108 m^(3) will be reached in 2030,and the proven rate of recoverable gas resources will be around 14%,which indicates the sustainability of the development goal.In order to realize these development goals,five suggestions are put forward:(1)Maintain continuous and stable investment in exploration and development,so that new breakthroughs and discoveries can be achieved continuously in natural gas exploration and natural gas development can keep the production arrow upward while compensating the production decline;(2)Strengthen technological researches and make use of technological and managerial innovation to break through forbidden exploration areas and improve the development benefits of gas fields;(3)Enhance the comprehensive management of developed gas fields to increase their ultimate recovery factor;(4)Optimize domestic and foreign gas sources,conventional and unconventional gas compositions as a whole to improve the ability to deal with gas supply risks;(5)Provide taxation preferences and subsidy policies continuously for unconventional natural gas to speed up the large-scale benefit production increase of unconventional natural gas.展开更多
Based on the advantages of the application of Building Information Modelling(BIM)technology in highway engineering,this paper analyzes the difficulties of its in-depth application,grasps the pain points of the applica...Based on the advantages of the application of Building Information Modelling(BIM)technology in highway engineering,this paper analyzes the difficulties of its in-depth application,grasps the pain points of the application of BIM technology in practice,and approaches from the integration of BIM design-construction.This paper also puts forward the integration of cross-stage information based on the BIM+Geographic Information System(GIS)construction information management system to realize the BIM whole life cycle management,and provides directional support for the continuous and efficient application of BIM technology in engineering practice.展开更多
In recent decades, with the constant progress of society, the study of ecological civilization has attracted extensive attention of scholars at home and abroad, and more in-depth research on its theory and application...In recent decades, with the constant progress of society, the study of ecological civilization has attracted extensive attention of scholars at home and abroad, and more in-depth research on its theory and application has been conducted. In this paper, the historical background, theoretical and realistic bases of ecological civilization were analyzed, showing that the birth and development of ecological civilization is inseparable from the historical development of human society. Then the development prospects and application fields of ecological civilization were discussed further.展开更多
Ultra-high temperature ceramic coatings have ultra-high melting points,excellent mechanical properties and high temperature ablation resistance.These unique performance combinations turn it into a promising material f...Ultra-high temperature ceramic coatings have ultra-high melting points,excellent mechanical properties and high temperature ablation resistance.These unique performance combinations turn it into a promising material for use in extreme environment structures in rockets and hypersonic vehicles,particularly nozzles,leading edges and engine components.In this paper,various preparation methods of ultra-high temperature ceramic coatings were reviewed,including plasma spraying,chemical vapor deposition,pack cementation,slurry sintering,hot pressing and their research progress.Meanwhile,some new preparation methods of high temperature coatings,such as ion beam deposition,ultrasonic spraying,metal organic frame work coating,and magnetron sputtering,were introduced.The development trend of ultra-high temperature coatings was prospected as well.展开更多
In this paper, we conduct research on the library development prospects and challenges under the environment of big data and cloud computing. Increasingly nervous and public libraries are facing funding, resources con...In this paper, we conduct research on the library development prospects and challenges under the environment of big data and cloud computing. Increasingly nervous and public libraries are facing funding, resources construction pace slow or stagnant difficult situation, readers to the library cause in the new times challenge. Big data era has quietly come, for the knowledge storage, use and development as own duty, the library, how to improve the ability of handling large amounts of growth literature is urgent. Our methodology solves the issues well which will be meaningful.展开更多
Network information security is an important issue mattering national security and sovereignty, social stability, cultural inheritance and development. Its importance is escalating with the accelerated pace of global ...Network information security is an important issue mattering national security and sovereignty, social stability, cultural inheritance and development. Its importance is escalating with the accelerated pace of global information. Information security is a comprehensive discipline involving computer science, network technology, communication technology, cryptography, information security technology, applied mathematics, number theory, information theory and other disciplines. It mainly refers to the condition that network hardware, software and system data are protected from destruction, change and divulgation from accidental or malicious reasons so that the system can run continuously and reliably with no interrupted network service.展开更多
China is a large developing country with rapid growth rate. To the year 2050, its electric power will be increased by six to eight times, reaching 1.5—1.8 TW total installed capacity. The development can not only rel...China is a large developing country with rapid growth rate. To the year 2050, its electric power will be increased by six to eight times, reaching 1.5—1.8 TW total installed capacity. The development can not only rely on the existing technology, it is crucial to accelerate the new technology development. This article discusses the perspective of various new technologies from the available energy resources and the required increase of electric power.展开更多
Human science and technology continue to advance over time.In the future,universal drugs will gradually fade out of our lives with the accumulation of time.With the advancement of genetic engineering,future genetic en...Human science and technology continue to advance over time.In the future,universal drugs will gradually fade out of our lives with the accumulation of time.With the advancement of genetic engineering,future genetic engineering drugs will be based on each difference and due to It differs from person to person,and the development of genetic engineering pharmaceuticals will make breakthroughs.展开更多
文摘Purpose–This study summarizes the overall situation of the resources of the national science and technology innovation platform in the railway industry,including the distribution of platform types,supporting institutions,construction sites,professional fields,etc.,to provide a reference for the further improvement and optimization of the national science and technology innovation platform system in the railway industry.Design/methodology/approach–Through literature review,field investigation,expert consultation and other methods,this paper systematically investigates and analyzes the development status of the national science and technology innovation platform in the railway industry.Findings–Taking the national science and technology innovation platform of the railway industry as the research object,this paper investigates and analyzes the construction,development and distribution of the national science and technology innovation platform of railway industry over the years.And the National Engineering Research Center of High-speed Railway and Urban Rail Transit System Technology was taken as an example to introduce its operation effect.Originality/value–China Railway has made great development achievements,with the construction and development of national science and technology innovation platform in the railway industry.In recent years,a large number of national science and technology innovation platforms have been built in the railway industry,which play an important role in railway technological innovation,standard setting and commodification,and Railway Sciences provide strong support for railway technology development.
基金supported by the National Natural Science Foundation of China(41927801)the Major Special Project of Yunnan Province(202302AF080001)the Key Research and Development Program of Yunnan Province(202303AA080006).
文摘China is tectonically composed of a series of plates and orogenic belts and has been influenced by the Pacific and Indian plates since the Late Paleozoic,forming a regular distribution of Mesozoic and Cenozoic granites.As an important source of geothermal energy,granite is thefive elements of geothermal enrichment:geothermal sources;geothermal reservoirs;heat transmission;heat caprock;and heat preservation and it is possible to classify the types of geothermal resources in China according to their distribution in combination with neotectonic movements.China's geothermal energy can be divided into hydrothermal and hot dry rock types in basins and orogenic belts,respectively.Geothermal resources can be divided into hydrothermal,rock,magma,and hybrid geothermal types according to the heat carrier type.Basin geothermal resources are dominated by hydrothermal types,while geothermal energy in orogenic belts with granite includes both hydrothermal and hot dry rock types.Geothermal resources in China can be divided into 6 distinct geothermal regions and 13 subregions,of which the Southwest and Southeast China regions and the Qaidam-Qilian and Jiaoliao subregions in North China with Mesozoic and Cenozoic granites are the most favorable areas for high-temperature hydrothermal and hot dry rock sources.China has complex geological conditions,diverse types of geothermal resources,and broad prospects for development and utilization.Having performed extensive shallow hydrothermal geothermal development and utilization and completed various power generation tests,China's geothermal development and utilization is in a critical stage of transition from the direct utilization of shallow hydrothermal resources to high-temperature geothermal or hot dry rock power generation in middle and deep layers.Basic theoretical research,key technology breakthroughs,and policy incentives are the main issues that need to be addressed in the geothermal industry.
文摘The Silk Road Economic Belt,as a major initiative for global economic cooperation in the 21st century,has evolved into a critical economic cooperation region linking the Eurasian continent and its neighboring countries since it was proposed by the Chinese President in 2013.This paper explores the economic cooperation modes among countries along the Silk Road Economic Belt,analyzing its cooperation mechanisms,current development status,and future prospects.By examining the diversity and complexity of economic cooperation in this region,the paper highlights both its potential and challenges,providing theoretical support for advancing regional collaboration and achieving shared prosperity.
基金supported by the National Key R&D Plan(2019YFE0122300)Tianjin City Science and Technology Major Special Project and Project(18ZXRHSF00270)+1 种基金Tianjin Agricultural Development Service Center youth science and technology innovation project(ZXKJ202429)Tianjin City Mariculture Modern Agricultural Industry Technology System Innovation Team Project(ITTMRS2023005).
文摘Under the background of a new round of transformation and upgrading of the marine fishery industrial structure and the"speed up and upgrading"of the national marine ranching,this paper uses the method of combining practical experience,literature review,and field research to describe the development of marine ranching at home and abroad,and summarizes the practice process and achievements of Tianjin marine ranch:one national and two provincial marine ranch demonstration areas,16 ecotype reef areas,one seafood demonstration area,and one floating fish reef demonstration area were built,with a total scale of 26.9 km^(2),and a total of 134900 m^(2) fish reefs.This paper emphatically analyzed the construction experience and characteristics of the Tianjin Dashentang Marine Ranch demonstration area.Combined with the development orientation and objectives of Tianjin marine ranch,it is proposed to unify understanding,perfect development concept,accelerate the pace of scientific research,and adhere to ecological priority.In future,the construction of Tianjin marine ranch should encourage innovation to achieve leap-forward development,explore a new model of fishery development based on the'Economic Union',with'marine ranching-ecological farming-leisure tourism-featured products'as the main body.Based on relevant experience at home and abroad,the industrialization model of marine ranch with Tianjin characteristics should be established,which aims to provide strong support for the construction of"blue granary"in Tianjin,the implementation of Tianjin's coastal ranching strategy,and the promotion of Tianjin coastal ecosystem reconstruction and fishery resource recovery.
基金Major Special Items of National Oil and Gas(No.:2011ZX05018-001)National Key Basic Research&Development Plan(Plan 973)project(No.:2013CB228001).
文摘In the past five years,shale gas exploration and development has grown in a leaping-forward way in China.Following USA and Canada,China is now the third country where industrial shale gas production is realized,with the cumulative production exceeding 60×10^(8) m^(3) until the end of 2015.In this paper,the main achievements of shale gas exploration and development in China in recent years were reviewed and the future development prospect was analyzed.It is pointed out that shale gas exploration and development in China is,on the whole,still at its early stage.Especially,marine shale gas in the Sichuan Basin has dominated the recent exploration and development.For the realization of shale gas scale development in China,one key point lies in the breakthrough and industrial production of transitional facies and continental facies shale gas.Lowemoderate yield of shale gas wells is the normal in China,so it is crucial to develop key exploration and development technologies.Especially,strictly controlling single well investment and significantly reducing cost are the important means to increase shale gas exploration and development benefits.And finally,suggestions were proposed in five aspects.First,continuously strengthen theoretical and technical re-searches,actively carry out appraisal on shale gas“sweet spots”,and gradually accumulate development basis.Second,stress on primary evaluation of exploration and development,highlight the effective implementation of shale gas resources,and control the rhythm of appraisal drilling and productivity construction.Third,highlight fine description and evaluation of shale gas reservoirs and increase the overall devel-opment level.Fourth,intensify the research on exploration and development technologies in order to stand out simple and practical technologies with low costs.And fifth,summarize the experiences in fast growth of shale gas exploration and development,highlight the demonstration and evaluation of key indicators,and try to achieve more breakthroughs and replacement in new areas,new domains and new strata.
基金This research was supported by the National Key Research and Development Program of China （2016YFC0801405 and 2017YFC0804105）, and the National Natural Science Foundation of China （51574250）. The authors also greatly indebted to Dr. Ye Chen, who is now working at the Research Centre of Photonics and Instrumentation at City, University of London, for his rigorous suggestions for this paper.
文摘Microseismic source location is the essential factor in microseismic monitoring technology, and its loca- tion precision has a large impact on the performance of the technique. Here, we discuss the problem of low-precision location identification for microseismic events in a mine, as may be obtained using conven-tional location methods that are based on arrival time. In this paper, microseismic location characteristics in mining are analyzed according to the characteristics of the mine＇s microseismic wavefield. We review research progress in mine-related microseismic source location methods in recent years, including the combination of the Geiger method with the linear method, combined microseismic event location method, optimization of relative location method, location method without pre-measured velocity, and location method without arrival time picking. The advantages and disadvantages of these methods are discussed, along with their feasible conditions. The influences of geophone distribution, first arrival time picking, and the velocity model on microseismic source location are analyzed, and measures are proposed to influence these factors. Approaches to solve the problem under study include adopting information fusion, combining and optimizing existing methods, and creating new methods to realize high-precision microseismic source location. Optimization of the velocity structure, along with applications of the time-reversal imaging technique, passive time-reversal mirror, and relative interferometric imag-ing, are expected to greatly improve microseismic location precision in mines. This paper also discusses the potential application of information fusion and deep learning methods in microseismic source location in mines. These new and innovative location methods for microseismic source location have extensive prospects for development.
基金Supported by Construction of Minor Cereals Industry Innovation Team of Shandong Agricultural Industry Research System(SDARS-16-01)High Level Talent Introduction and Youth Talent Training Program of Shandong Academy of Agricultural SciencesAgricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2016A02)
文摘Quinoa is the only single plant meeting the basic nutritional needs of the human body. It is the whole nutritious food with nutritional balance, wide adaptability, strong resistance and other characteristics. In this paper, the botanical characteristics and nutritional value of quinoa were systematically introduced, and the development of quinoa in China was reviewed. The problems of domestic quinoa industry, the shortage of germplasm resources, the lack of innovation and high-yielding cultivation techniques were analyzed. To provide theoretical references for quinoa planting and industrial development in China, the countermeasures to improve the investment of quinoa industry and promote the development of multi-form industry were put forward.
基金Project supported by the National Science and Technology Major Project"Development Demonstration Engineeing of Large Low-Permability Lithologic and Stratigraphic Oil and Gas Reservoirs in the Ordos Basin"(No.2016ZX05050)the PetoChina's Science and Technology Major Project,"Study on Production Stabilization and EOR Technologics of Changqing Gas Field"(No.2016E-0509).
文摘At present,natural gas accounts for a low proportion in China's primary energy consumption structure and is highly dependent on foreign sources.Changqing gas province of the Ordos Basin where PetroChina Changqing Oilfield Company(referred to as Changqing Oilfield)is located is one of China's four major natural gas production bases.It bears the important responsibility for ensuring people's livelihood and promoting the healthy development of society economy.In recent years,Changqing Oilfield actively implements national instructive spirit on vigorously promoting domestic oil and gas exploration and development strength and formulates the secondary acceleration development strategies.Its annual natural gas production in 2020 reaches 448.5×10^(8) m^(3) and oil and gas equivalent exceeds 6000×10^(4) t,tamping its important position of“Western Daqing”in this industry.In order to further promote the continuous stable production and realize the goal of quality and efficiency improvement in Changqing gas province,this paper analyzes the situations and challenges of natural gas development in this gas province,prepares the development technological countermeasures and forecast the natural gas development prospect.And the following research results are obtained.First,the natural gas exploration and development in Changqing gas province is divided into four stages and the main technologies for the development of low-permeability carbonate gas reservoir,low-permeability sandstone gas reservoir and tight sandstone gas reservoir are formed.Second,the natural gas development in Changqing gas province faces six challenges,such as low reserve production degree,sharp decline of production rates and complex distribution of remaining undeveloped reserves of developed gas fields.And twenty-six development technological countermeasures are put forward correspondingly,such as well pattern thickening,extension and reserve increase,secondary production layer potential tapping and fine gas well management.Third,the development direction and goal of natural gas development in Changqing gas province is to pay equal attention to the stable production of old gas fields and the production increase of new areas and carry out conventional gas and unconventional gas research simultaneously.In conclusion,the annual natural gas production of Changqing gas province will maintain a sound momentum of steady growth and will exceed 500×10^(8) m^(3) at the end of the 14th Five-Year Plan and maintain at a stable level for a long term,which is conducive to the optimization of domestic energy consumption structure and realization of“carbon peak and carbon neutrality”.
文摘In order to better promote the sustainable,effective and rapid development of natural gas business and the on-schedule realization of“carbon peak and carbon neutrality”goal,this paper summarizes and reviews the achievements and experience in the development of natural gas industry in China.Then,the influence of energy environmental policies on the development of natural gas industry is analyzed,and domestic natural gas exploration and development situations are dissected.Finally,domestic natural gas exploration and development prospect is forecasted,and the corresponding development suggestions are proposed.And the following research results are obtained.First,under the commitment of the Paris Agreement and the strategy of carbon peak and carbon neutrality,China's natural gas industry faces unprecedented development opportunities.Second,domestic natural gas is characterized by abundant resource bases,low proven rate of resource and clear target and field of reserve and production increase,but the complexity of the resources and the rise of exploration and development cost make it more difficult to realize the large-scale efficient increase of natural gas production.Third,nevertheless,in order to ensure national energy security and reach the dual goals of economic development and environmental protection,China continues to powerfully enhance domestic oil and gas exploration and development.According to the growth trend of new proved gas reserves,it is predicted that the domestic new proved gas reserves by 2040 will be 16×10^(12)-20×10^(12) m^(3),the peak natural gas production of 2900×108-3300×108 m^(3) will be reached in 2030,and the proven rate of recoverable gas resources will be around 14%,which indicates the sustainability of the development goal.In order to realize these development goals,five suggestions are put forward:(1)Maintain continuous and stable investment in exploration and development,so that new breakthroughs and discoveries can be achieved continuously in natural gas exploration and natural gas development can keep the production arrow upward while compensating the production decline;(2)Strengthen technological researches and make use of technological and managerial innovation to break through forbidden exploration areas and improve the development benefits of gas fields;(3)Enhance the comprehensive management of developed gas fields to increase their ultimate recovery factor;(4)Optimize domestic and foreign gas sources,conventional and unconventional gas compositions as a whole to improve the ability to deal with gas supply risks;(5)Provide taxation preferences and subsidy policies continuously for unconventional natural gas to speed up the large-scale benefit production increase of unconventional natural gas.
基金Chongqing Engineering Institute 2023 Intramural Research Fund Grant Project:Highway Engineering Construction Process Management and Technological Innovation Research Based on BIM Technology(Project number:2023xzky04)。
文摘Based on the advantages of the application of Building Information Modelling(BIM)technology in highway engineering,this paper analyzes the difficulties of its in-depth application,grasps the pain points of the application of BIM technology in practice,and approaches from the integration of BIM design-construction.This paper also puts forward the integration of cross-stage information based on the BIM+Geographic Information System(GIS)construction information management system to realize the BIM whole life cycle management,and provides directional support for the continuous and efficient application of BIM technology in engineering practice.
基金Supported by the National Social Science Foundation of China(12BJY031)
文摘In recent decades, with the constant progress of society, the study of ecological civilization has attracted extensive attention of scholars at home and abroad, and more in-depth research on its theory and application has been conducted. In this paper, the historical background, theoretical and realistic bases of ecological civilization were analyzed, showing that the birth and development of ecological civilization is inseparable from the historical development of human society. Then the development prospects and application fields of ecological civilization were discussed further.
基金supported by the Henan College Students Innovation and Entrepreneurship Training Program(202211070009 and 202211070016).
文摘Ultra-high temperature ceramic coatings have ultra-high melting points,excellent mechanical properties and high temperature ablation resistance.These unique performance combinations turn it into a promising material for use in extreme environment structures in rockets and hypersonic vehicles,particularly nozzles,leading edges and engine components.In this paper,various preparation methods of ultra-high temperature ceramic coatings were reviewed,including plasma spraying,chemical vapor deposition,pack cementation,slurry sintering,hot pressing and their research progress.Meanwhile,some new preparation methods of high temperature coatings,such as ion beam deposition,ultrasonic spraying,metal organic frame work coating,and magnetron sputtering,were introduced.The development trend of ultra-high temperature coatings was prospected as well.
文摘In this paper, we conduct research on the library development prospects and challenges under the environment of big data and cloud computing. Increasingly nervous and public libraries are facing funding, resources construction pace slow or stagnant difficult situation, readers to the library cause in the new times challenge. Big data era has quietly come, for the knowledge storage, use and development as own duty, the library, how to improve the ability of handling large amounts of growth literature is urgent. Our methodology solves the issues well which will be meaningful.
文摘Network information security is an important issue mattering national security and sovereignty, social stability, cultural inheritance and development. Its importance is escalating with the accelerated pace of global information. Information security is a comprehensive discipline involving computer science, network technology, communication technology, cryptography, information security technology, applied mathematics, number theory, information theory and other disciplines. It mainly refers to the condition that network hardware, software and system data are protected from destruction, change and divulgation from accidental or malicious reasons so that the system can run continuously and reliably with no interrupted network service.
文摘China is a large developing country with rapid growth rate. To the year 2050, its electric power will be increased by six to eight times, reaching 1.5—1.8 TW total installed capacity. The development can not only rely on the existing technology, it is crucial to accelerate the new technology development. This article discusses the perspective of various new technologies from the available energy resources and the required increase of electric power.
文摘Human science and technology continue to advance over time.In the future,universal drugs will gradually fade out of our lives with the accumulation of time.With the advancement of genetic engineering,future genetic engineering drugs will be based on each difference and due to It differs from person to person,and the development of genetic engineering pharmaceuticals will make breakthroughs.
