Fast charging and high-power delivering batteries are highly demanded in mobile electronics,electric vehicles and grid energy storage,but there are full of challenges.The star-material Li_(3)V_(2)(PO_(4))_(3) is demon...Fast charging and high-power delivering batteries are highly demanded in mobile electronics,electric vehicles and grid energy storage,but there are full of challenges.The star-material Li_(3)V_(2)(PO_(4))_(3) is demonstrated as a promising high-rate cathode material meeting the above requirements.Herein,we report the carbon decorated Li_(3)V_(2)(PO_(4))_(3) (LVP/C) cathode prepared via a facile method,which displays a remarkable high-rate capability and long-term cycling performance.Briefly,the prepared LVP/C delivers a high discharge capacity of 122 mAh g^(-1)(-93% of the theoretical capacity) at a high rate up to 20 C and a superior capacity retention of 87.1% after 1000 cycles.Importantly,by applying a combination of X-ray absorption spectroscopy and full-range mapping of resonant inelastic X-ray scattering,we clearly elucidate the structural and chemical evolutions of LVP upon various potentials and cycle numbers.We show unambiguous spectroscopic evidences that the evolution of the hybridization strength between V and O in LVP/C as a consequence of lithiation/delithiation is highly reversible both in the bulk and on the surface during the discharge-charge processes even over extended cycles,which should be responsible for the remarkable electrochemical performance of LVP/C.Our present study provides not only an effective synthesis strategy but also deeper insights into the surface and bulk electrochemical reaction mechanism of LVP,which should be beneficial for the further design of high-performance LVP electrode materials.展开更多
Construction of the ecological compensation mechanism is an important approach to put the“Beijing-Tianjin-Hebei Coordinated Development Plan”into practice and improve the ecological environment of the Beijing-Tianji...Construction of the ecological compensation mechanism is an important approach to put the“Beijing-Tianjin-Hebei Coordinated Development Plan”into practice and improve the ecological environment of the Beijing-Tianjin-Hebei region.This paper constructs an ecological compensation mechanism for the Beijing-Tianjin-Hebei region based on the footprint balance and footprint deficit after clarifying ecological governance objectives.First,this paper proposes to establish a uniform,hierarchical and classified supply mechanism of ecosystem services according to the classification of land resources,water resources and forest resources for the Beijing-Tianjin-Hebei region.Then,the“Authority with Corresponding Responsibility”for the supply of ecosystem services in the Beijing-Tianjin-Hebei region can be realized through a footprint balance and footprint deficit indicator circulation mechanism.Finally,the scientific and rational ecological compensation standard can be guaranteed through establishing the integrated governance mechanism for ecological compensation in the Beijing-Tianjin-Hebei region and improving the“ecological compensation standard”.The results of this paper can provide sound theoretical support for effectively promoting the improvement of ecosystem services and human well-being in the Beijing-Tianjin-Hebei region.展开更多
How to speed up the establishment of marine ecological compensation and the ecological compensation system is inevitable choice from ocean country to marine power.Therefore,construction of marine ecological compensati...How to speed up the establishment of marine ecological compensation and the ecological compensation system is inevitable choice from ocean country to marine power.Therefore,construction of marine ecological compensation mechanism is the effective means which incentives marine ecosystem services supply,improves the quality of marine ecology,and promotes the ocean to the green transformation.Combined with Dalian maritime case study in Liaoning Province,three dimensional interactive marine ecological compensation mechanism,the compensation frame work,path and operation mechanism were built up.Suggestions on accelerating the legislation process;perfecting the management system;establishing proper system for both incentive constraint and reward-punishment;increasing the source of Ocean Ecological Compensation funds;accelerating On the study of the Ocean Ecological Compensation Mechanism in Liaoning Area from the Angl-e of Ecological Civilization Based on Case Analysis of Dalian.展开更多
The ecological protection of the inter-provincial river basin of Xin’anjiang River takes the ecological compensation mechanism as the starting point and achieves good results.The success of the mechanism is best refl...The ecological protection of the inter-provincial river basin of Xin’anjiang River takes the ecological compensation mechanism as the starting point and achieves good results.The success of the mechanism is best reflected in its innovation of public policy supply,which is not only a vivid practice of Xi Jinping’s ecological civilization thought in the new era,but also establishes a model for absorption,transformation and export of policy supply.The effective supply of public policies on ecological environment is the realistic choice for the construction of ecological civilization in the new era.展开更多
Establishment of the ecological compensation mechanism is one important way for solving a series of issues in Baiyangdian Watershed, including environment pollution, ecological deterioration, unsustained water supplem...Establishment of the ecological compensation mechanism is one important way for solving a series of issues in Baiyangdian Watershed, including environment pollution, ecological deterioration, unsustained water supplement, rural pollution aggravation and ecological migration. Based on the principles of main functional area, public goods, welfare economics, financial transfer payment and watershed management, we put forward the construction framework of ecological compensation mechanism in Baiyangdian Watershed. Compensation subject is governments at all levels and beneficiary within watershed. Compensation object is governments at all levels, eco-builder and victim within watershed. Compensation way in- dudes government-led and market-oriented and game-negotiation types. Compensation standard includes financial transfer payment, compensation between upstream and downstream of the watershed, rural environmental protection with collections of management fees and subsidies to co-gov- ernance, ecological migration and inter-basin section. The safeguard measures of implementation for ecological compensation mechanism in Baiy- angdian Watershed are setting legal system and status of the ecological compensation, ensuring special usage of the ecological compensation fund, carrying out performance evaluation index system, building social management system of the ecological compensation and promoting the reform of watershed manaQement structure.展开更多
Scientific grassland ecological compensation mechanism is favorable for improving the grassland ecological environment and promote the sustainable development of animal husbandry. Combined with actual situations of Ti...Scientific grassland ecological compensation mechanism is favorable for improving the grassland ecological environment and promote the sustainable development of animal husbandry. Combined with actual situations of Tibet,this paper discussed core issues in the design of grassland ecological compensation mechanism,including compensation purpose,compensation subject,compensation object,compensation standard,and compensation method. It pointed out that the design of mechanism is a complex and systematic project. Each issue is complex and varied. The government at all levels should be cautious and make scientific treatment,and should not apply a single solution for all issues.展开更多
The construction of the market-oriented ecological compensation mechanism in China is complicated system engineering. China's ecological compensation funds are mainly derived from the public finance, lacking marke...The construction of the market-oriented ecological compensation mechanism in China is complicated system engineering. China's ecological compensation funds are mainly derived from the public finance, lacking market-oriented operation. That not only increases the financial burden of the government, but also leads to the incomprehensive compensation scope. Moreover, China's ecological compensation lacks market mechanism so that it is difficult to set compensation standards and calculate offsets. This paper takes Gannan Tibetan Autonomous Prefecture as an example to analyze the market-oriented ecological compensation system of ethnic minority areas from the perspective of market economy, so as to provide a theoretical basis and a reference point for the establishment of efficient and reasonable ecological compensation mechanism and policies in ethnic minority areas and provide environmental protection for the sustainable development of economy and society of ethnic minority areas.展开更多
Erhai Lake in Dali,Yunnan province,is the"Mother Lake"of the Bai people.It has superior location advantages,remarkable comprehensive functions and profound historical culture.It is the cradle of Dali’s poli...Erhai Lake in Dali,Yunnan province,is the"Mother Lake"of the Bai people.It has superior location advantages,remarkable comprehensive functions and profound historical culture.It is the cradle of Dali’s politics,economy and culture,and also the foundation of the sustainable economic development of the Autonomous Prefecture.After the government put great efforts to govern Erhai Lake,the original interest demand structure of the surrounding residents was broke down,and the problems of interest friction and interest conflict became the practical problems faced by the region.This paper will analyze the compensation mechanism of Erhai Lake’s ecological interests from the aspects of ecological damage,stakeholders,interests,tourism transformation and so on,so as to provide a reference for the transformation and upgrading of national tourism destinations and tourism industry.展开更多
Ecological compensation mechanism for drinking water source is one of the effective economic ways to solve the issues of the shortage of the protection investment and the lack of the driving forces to protect the wate...Ecological compensation mechanism for drinking water source is one of the effective economic ways to solve the issues of the shortage of the protection investment and the lack of the driving forces to protect the water quality.The successful cases of compensation mechanism for drinking water source have examined the dilemma of improving the trans-administrative boundary compensation mechanism both in China and Yunnan.The lack of the provincial rules and regulations in Yunnan is the fundamental reason for the local government not willingly to establish the compensation mechanism.On the other hand,the shortage of the compensation funds is the key difficulty for the shareholders to reach an agreement.Formulating the rules and regulations about the construction of the compensation mechanism of drinking water source in Yunnan would be a feasible way to stipulate the local government to set up the compensation mechanism.Meanwhile,designing a complete set of compensation mechanism would make full use of the mechanism to work well to protect the water quality in an economic way.展开更多
O3-types layered cathode materials in sodium-ion batteries(SIBs)suffer from the obvious lattice distortion induced by the complex phase transitions during Na^(+)intercalation/deintercalation process,leading to severe ...O3-types layered cathode materials in sodium-ion batteries(SIBs)suffer from the obvious lattice distortion induced by the complex phase transitions during Na^(+)intercalation/deintercalation process,leading to severe structural collapse and performance degradation.Herein,a series of high valence tantalum(Ta^(5+))doped Na(Ni_(0.4)Fe_(0.2)Mn_(0.4))_(1−x)Ta_(x)O_(2)(x=0/0.0025/0.005/0.01)secondary spherical particles are firstly developed,where Ta^(5+)doping enables the refined primary grain with a tightly stacked rod-like morphology.Comprehensive structural analysis via Neutron powder diffraction(NPD)and Synchrotron radiation X-ray diffraction(SXRD)reveals an expanded NaO_(2)slab and a reduction in Na site vacancy.The potential charge compensation mechanism is further illustrated by X-ray absorption spectroscopy(XAS)and X-ray photoelectron spectroscopy(XPS),unveiling a partial reduction from Ni^(3+)to Ni^(2+)with Ta^(5+)doping.In situ X-ray diffraction(in situ XRD)suggests that the decorated sample undergoes a volume change as low as 0.8%,in contrast with the pristine one(1.5%).Thus,the optimized sample with x=0.005 retains an enhanced capacity retention up to 70.4%at 1 C after 300 cycles in half-cell and delivers a high energy density of 251 Wh kg^(-1)(0.1 C)and with a good capacity retention of 81.0%at 1 C after 200 cycles in full-cell.Our findings provide new insights into the mechanism of high valence Ta^(5+)doping in stabilizing layered oxides cathode materials for SIBs.展开更多
Because of the rapid growth of new energy and the accompanying considerable uncertainty in the power market,the demand for flexibility in a power sys-tem has risen sharply.In the meantime,the market structure of auxil...Because of the rapid growth of new energy and the accompanying considerable uncertainty in the power market,the demand for flexibility in a power sys-tem has risen sharply.In the meantime,the market structure of auxiliary services has changed,resulting in market participants(MPs)benefiting less than expected from providing flexible services.To encourage MPs to provide flexibility,this study proposes a dynamic design framework for an auxiliary service compensation mech-anism.To evaluate the proposed framework,a case study is conducted,examining a peak-shaving service in Liao-ning province in northeast China.First,the operational status and limitations of the typical product,the peak-shaving service,in China’s flexibility auxiliary ser-vices market are analyzed.Then,taking into consideration the time value of the flexible products provided by the MPs,a dynamic mechanism for hierarchical compensation of flexibility auxiliary service costs is proposed,and a mathematical model aimed at optimizing the MPs’comprehensive income is constructed.The results show that,compared with the existing traditional mechanism,the proposed method can effectively guarantee fair remu-neration for the flexibility provider,while easing the tense supply-demand relationship in the flexibility market.展开更多
On the basis of analysis of the present situation of the ecological benefit compensation in China and foreign countries, this paper discusses the necessity, principle and approach of establishing the compensation mech...On the basis of analysis of the present situation of the ecological benefit compensation in China and foreign countries, this paper discusses the necessity, principle and approach of establishing the compensation mechanism of forest ecological benefit, as well as compensation standard in order to provide scientific basis for further perfecting the compensation mechanism of forest ecological engineering benefit in China. It is suggested that setting up the compensation mechanism of forest ecological benefit can not only provide the steady funds source of managing and protecting forest resources, but resolve radically the dynamic and mechanism problems of commonweal forest ecological engineering construction, which will produce a widespread and profound influence on China forestry and ecological construction.展开更多
The paper discusses methods to compensate for the costs incurred in the supply of forest ecological services （FES）, i.e. government dominated and market-based instruments as well as progress made so far in China. Fa...The paper discusses methods to compensate for the costs incurred in the supply of forest ecological services （FES）, i.e. government dominated and market-based instruments as well as progress made so far in China. Factors which constrain the supply of these services and potential policy improvements are presented.展开更多
A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced duri...A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced during the tunnel construction.To mitigate this problem,a support system was designed incorporating negative Poisson ratio(NPR)anchor cables with negative Poisson ratio effect.Physical model experiments,field experiments,and numerical simulation experiments were conducted to investigate the compensation mechanical behavior of NPR anchor cables.The large deformations of soft rocks in the Daliangshan Tunnel are caused by a high ground stress,a high degree of joint fracture development,and a high degree of surrounding rock fragmentation.A compensation mechanics support system combining long and short NPR anchor cables was suggested to provide sufficient counter-support force(approximately 350 kN)for the surrounding rock inside the tunnel.Comparing the NPR anchor cable support system with the original support system used in the Daliangshan tunnel showed that an NPR anchor cable support system,combining cables of 6.3 m and 10.3 m in length,effectively prevented convergence of surrounding rock deformation,and the integrated settlement convergence value remained below 300 mm.This study provides an effective scientific basis for resolving large deformation problems in deeply buried soft rocks in western transverse mountain areas.展开更多
The control problems of chaotic systems are investigated in the presence of parametric uncertainty and persistent external disturbances based on nonlinear control theory. By using a designed nonlinear compensator mech...The control problems of chaotic systems are investigated in the presence of parametric uncertainty and persistent external disturbances based on nonlinear control theory. By using a designed nonlinear compensator mechanism, the system deterministic nonlinearity, parametric uncertainty and disturbance effect can be compensated effectively. The renowned chaotic Lorenz system subjected to parametric variations and external disturbances is studied as an illustrative example. From the Lyapunov stability theory, sufficient conditions for choosing control parameters to guarantee chaos control are derived. Several experiments are carried out, including parameter change experiments, set-point change experiments and disturbance experiments. Simulation results indicate that the chaotic motion can be regulated not only to steady states but also to any desired periodic orbits with great immunity to parametric variations and external disturbances.展开更多
The Tibetan, Han and other ethnic people in Tibetan Autonomous Region labored hard to protect the forests and steppes and produce invisible ecological products. The forests and steppes in Qinghai -Tibet Plateau conser...The Tibetan, Han and other ethnic people in Tibetan Autonomous Region labored hard to protect the forests and steppes and produce invisible ecological products. The forests and steppes in Qinghai -Tibet Plateau conserved water and added the Jinsha River. In order to achieve sustainable development, it needs to construct compensating mechanism inter Provinces between the upper Yangtze River and the middle and lower Yangtze River, to implement carbon sink trading, and to assist farmers and herdsmen in the Tibet to get rich as soon as possible.展开更多
NPR anchor cable is a new type of support material with negative Poisson's ratio effect,which is widely used in mine support because of its superb compensating mechanical effect.In order to study more deeply the s...NPR anchor cable is a new type of support material with negative Poisson's ratio effect,which is widely used in mine support because of its superb compensating mechanical effect.In order to study more deeply the support effect of NPR anchor cable in soft rock large deformation tunnel,indoor test,numerical simulation and field monitoring were used to study the strong weathering carbonaceous slate tunnel in Min County.The study shows that NPR anchor cable has extraordinary compensating mechanical behavior for soft rock large deformation tunnel,which can control the deformation of tunnel surrounding rock below 300 mm and keep the constant resistance value around 350 kN,which has obvious effect on the control of broken rock.To provide a basis for other research on support for large deformation tunnels in soft rock.展开更多
Under the impetus of the“Dual Credit”policy,traditional fuel vehicle manufacturers are confronted with significant pressure to meet new energy vehicle credit requirements.To address this challenge,these manufacturer...Under the impetus of the“Dual Credit”policy,traditional fuel vehicle manufacturers are confronted with significant pressure to meet new energy vehicle credit requirements.To address this challenge,these manufacturers are increasingly adopting the Original Design Manufacturer(ODM)strategy to collaborate with new energy vehicle enterprises,thereby acquiring credits and expanding their market presence.However,this strategic approach not only intensifies competition between new energy and traditional fuel vehicle markets but also reshapes the profit distribution between the two types of firms.Drawing upon the framework of the Dual Credit policy,this study establishes a Cournot game model to examine the strategic interactions between traditional fuel vehicle manufacturers and new energy vehicle producers.It further investigates the optimal production decisions under the ODM strategy and evaluates their implications for market dynamics and corporate profitability.The findings reveal that,although the ODM strategy heightens market competition,it leads to substantial profit improvements for both types of manufacturers compared to the alternative of directly purchasing credits,while also fostering the growth of the new energy vehicle sector.Moreover,the Case study demonstrates micro-level impact of the dual credit policy on enterprises’response strategies,offering valuable insights for policymakers and industry decision-makers.展开更多
Resonant and nonresonant intermolecular vibrational energy transfers in Gdm- SCN/KSCN=1/1, GdmSCN/KS^13CN=1/1 and GdmSCN/KS^13C^15N=1/1 mixed crystals in melts and in aqueous solutions are studied with the two dimensi...Resonant and nonresonant intermolecular vibrational energy transfers in Gdm- SCN/KSCN=1/1, GdmSCN/KS^13CN=1/1 and GdmSCN/KS^13C^15N=1/1 mixed crystals in melts and in aqueous solutions are studied with the two dimensional infrared spectroscopy. The energy transfers in the samples are slower with a larger energy donor/acceptor gap, independent of the Raman spectra. The energy gap dependences of the nonresonant energy transfers cannot be described by the phonon compensation mechanism. Instead, the experi- mental energy gap dependences can be quantitatively described by the dephasing mechanism. Temperature dependences of resonant and nonresonant energy transfer rates in the melts are also consistent with the prediction of the dephasing mechanism. The series of results suggest that the dephasing mechanism can be dominant not only in solutions, but also in melts （pure liquids without solvents）, only if the molecular motions （translations and rotations） are much faster than the nonresonant energy transfer processes.展开更多
基金supported by Collaborative Innovation Center of Suzhou Nano Science & Technologythe Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)+5 种基金the 111 roject, Joint International Research Laboratory of Carbon-Based Functional Materials and Devicesthe National Natural Science Foundation of China (11905154)the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJA550004)the Natural Science Foundation of Jiangsu Province (BK20190814)the National Key R&D Program of China (No. 2016YFA0202600)supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231。
文摘Fast charging and high-power delivering batteries are highly demanded in mobile electronics,electric vehicles and grid energy storage,but there are full of challenges.The star-material Li_(3)V_(2)(PO_(4))_(3) is demonstrated as a promising high-rate cathode material meeting the above requirements.Herein,we report the carbon decorated Li_(3)V_(2)(PO_(4))_(3) (LVP/C) cathode prepared via a facile method,which displays a remarkable high-rate capability and long-term cycling performance.Briefly,the prepared LVP/C delivers a high discharge capacity of 122 mAh g^(-1)(-93% of the theoretical capacity) at a high rate up to 20 C and a superior capacity retention of 87.1% after 1000 cycles.Importantly,by applying a combination of X-ray absorption spectroscopy and full-range mapping of resonant inelastic X-ray scattering,we clearly elucidate the structural and chemical evolutions of LVP upon various potentials and cycle numbers.We show unambiguous spectroscopic evidences that the evolution of the hybridization strength between V and O in LVP/C as a consequence of lithiation/delithiation is highly reversible both in the bulk and on the surface during the discharge-charge processes even over extended cycles,which should be responsible for the remarkable electrochemical performance of LVP/C.Our present study provides not only an effective synthesis strategy but also deeper insights into the surface and bulk electrochemical reaction mechanism of LVP,which should be beneficial for the further design of high-performance LVP electrode materials.
基金This research is supporteded by the Major Project of Humanities and Social Science Research of the Hebei Education Department(Grant No.ZD201907)the Young Scientists Fund of the Hebei College Science and Technology Research Program(Grant No.QN2018252)the Young Scientists Fund of the National Natural Science Foundation of China(Grant Nos..51909052,41807169).
文摘Construction of the ecological compensation mechanism is an important approach to put the“Beijing-Tianjin-Hebei Coordinated Development Plan”into practice and improve the ecological environment of the Beijing-Tianjin-Hebei region.This paper constructs an ecological compensation mechanism for the Beijing-Tianjin-Hebei region based on the footprint balance and footprint deficit after clarifying ecological governance objectives.First,this paper proposes to establish a uniform,hierarchical and classified supply mechanism of ecosystem services according to the classification of land resources,water resources and forest resources for the Beijing-Tianjin-Hebei region.Then,the“Authority with Corresponding Responsibility”for the supply of ecosystem services in the Beijing-Tianjin-Hebei region can be realized through a footprint balance and footprint deficit indicator circulation mechanism.Finally,the scientific and rational ecological compensation standard can be guaranteed through establishing the integrated governance mechanism for ecological compensation in the Beijing-Tianjin-Hebei region and improving the“ecological compensation standard”.The results of this paper can provide sound theoretical support for effectively promoting the improvement of ecosystem services and human well-being in the Beijing-Tianjin-Hebei region.
基金supported by the National Social Science Foundation: Research on Fiscal and Tax Policy Innovation and Mechanism of Coordinated Development of Regional Economy (14BJY003)Liaoning Social Science Foundation: Study on Ecological Compensation Mechanism of Liaoning Province (L13djy057)the Second Batch School of Marxism Major Research Direction Foundation Items of Liaoning Province: Study on Liaoning Province Ocean Strengthening Strategic Issues with Five Concepts Leading
文摘How to speed up the establishment of marine ecological compensation and the ecological compensation system is inevitable choice from ocean country to marine power.Therefore,construction of marine ecological compensation mechanism is the effective means which incentives marine ecosystem services supply,improves the quality of marine ecology,and promotes the ocean to the green transformation.Combined with Dalian maritime case study in Liaoning Province,three dimensional interactive marine ecological compensation mechanism,the compensation frame work,path and operation mechanism were built up.Suggestions on accelerating the legislation process;perfecting the management system;establishing proper system for both incentive constraint and reward-punishment;increasing the source of Ocean Ecological Compensation funds;accelerating On the study of the Ocean Ecological Compensation Mechanism in Liaoning Area from the Angl-e of Ecological Civilization Based on Case Analysis of Dalian.
文摘The ecological protection of the inter-provincial river basin of Xin’anjiang River takes the ecological compensation mechanism as the starting point and achieves good results.The success of the mechanism is best reflected in its innovation of public policy supply,which is not only a vivid practice of Xi Jinping’s ecological civilization thought in the new era,but also establishes a model for absorption,transformation and export of policy supply.The effective supply of public policies on ecological environment is the realistic choice for the construction of ecological civilization in the new era.
基金Supported by Special Issue of People's Livelihood Research,Social Science Development Research Item in Hebei Province(201101024)Planning Issues of Philosophy and Social Science in Hebei Province (HB09BLJ005)Water Body Pollution Control and Treatment, Key Item of National Science and Technology(2008ZX07209-007-07)
文摘Establishment of the ecological compensation mechanism is one important way for solving a series of issues in Baiyangdian Watershed, including environment pollution, ecological deterioration, unsustained water supplement, rural pollution aggravation and ecological migration. Based on the principles of main functional area, public goods, welfare economics, financial transfer payment and watershed management, we put forward the construction framework of ecological compensation mechanism in Baiyangdian Watershed. Compensation subject is governments at all levels and beneficiary within watershed. Compensation object is governments at all levels, eco-builder and victim within watershed. Compensation way in- dudes government-led and market-oriented and game-negotiation types. Compensation standard includes financial transfer payment, compensation between upstream and downstream of the watershed, rural environmental protection with collections of management fees and subsidies to co-gov- ernance, ecological migration and inter-basin section. The safeguard measures of implementation for ecological compensation mechanism in Baiy- angdian Watershed are setting legal system and status of the ecological compensation, ensuring special usage of the ecological compensation fund, carrying out performance evaluation index system, building social management system of the ecological compensation and promoting the reform of watershed manaQement structure.
基金Supported by Soft Science Project of Tibet Autonomous Region Department of Science and Technology"Study on Tibetan Grassland Ecological Compensation Mechanism Based on Conflict Management Theory"
文摘Scientific grassland ecological compensation mechanism is favorable for improving the grassland ecological environment and promote the sustainable development of animal husbandry. Combined with actual situations of Tibet,this paper discussed core issues in the design of grassland ecological compensation mechanism,including compensation purpose,compensation subject,compensation object,compensation standard,and compensation method. It pointed out that the design of mechanism is a complex and systematic project. Each issue is complex and varied. The government at all levels should be cautious and make scientific treatment,and should not apply a single solution for all issues.
文摘The construction of the market-oriented ecological compensation mechanism in China is complicated system engineering. China's ecological compensation funds are mainly derived from the public finance, lacking market-oriented operation. That not only increases the financial burden of the government, but also leads to the incomprehensive compensation scope. Moreover, China's ecological compensation lacks market mechanism so that it is difficult to set compensation standards and calculate offsets. This paper takes Gannan Tibetan Autonomous Prefecture as an example to analyze the market-oriented ecological compensation system of ethnic minority areas from the perspective of market economy, so as to provide a theoretical basis and a reference point for the establishment of efficient and reasonable ecological compensation mechanism and policies in ethnic minority areas and provide environmental protection for the sustainable development of economy and society of ethnic minority areas.
基金the Philosophy and Social Science Planning Project of Yunnan Province(Grant No.yb2017085)
文摘Erhai Lake in Dali,Yunnan province,is the"Mother Lake"of the Bai people.It has superior location advantages,remarkable comprehensive functions and profound historical culture.It is the cradle of Dali’s politics,economy and culture,and also the foundation of the sustainable economic development of the Autonomous Prefecture.After the government put great efforts to govern Erhai Lake,the original interest demand structure of the surrounding residents was broke down,and the problems of interest friction and interest conflict became the practical problems faced by the region.This paper will analyze the compensation mechanism of Erhai Lake’s ecological interests from the aspects of ecological damage,stakeholders,interests,tourism transformation and so on,so as to provide a reference for the transformation and upgrading of national tourism destinations and tourism industry.
文摘Ecological compensation mechanism for drinking water source is one of the effective economic ways to solve the issues of the shortage of the protection investment and the lack of the driving forces to protect the water quality.The successful cases of compensation mechanism for drinking water source have examined the dilemma of improving the trans-administrative boundary compensation mechanism both in China and Yunnan.The lack of the provincial rules and regulations in Yunnan is the fundamental reason for the local government not willingly to establish the compensation mechanism.On the other hand,the shortage of the compensation funds is the key difficulty for the shareholders to reach an agreement.Formulating the rules and regulations about the construction of the compensation mechanism of drinking water source in Yunnan would be a feasible way to stipulate the local government to set up the compensation mechanism.Meanwhile,designing a complete set of compensation mechanism would make full use of the mechanism to work well to protect the water quality in an economic way.
基金supported by the National Natural Science Foundation of China (52402298, 52172224, 52202228, 22479112)the Science and Technology Correspondent Project of Tianjin(24YDTPJC00240)+3 种基金Science Research Project of Hebei Education Department (BJK2022011)Central Funds Guiding the Local Science and Technology Development of Hebei Province (236Z4404G)the Beijing Tianjin Hebei Basic Research Cooperation Special Project(E2024202273)Tianjin Sci.&Tech. Program (22YFYSHZ00220)
文摘O3-types layered cathode materials in sodium-ion batteries(SIBs)suffer from the obvious lattice distortion induced by the complex phase transitions during Na^(+)intercalation/deintercalation process,leading to severe structural collapse and performance degradation.Herein,a series of high valence tantalum(Ta^(5+))doped Na(Ni_(0.4)Fe_(0.2)Mn_(0.4))_(1−x)Ta_(x)O_(2)(x=0/0.0025/0.005/0.01)secondary spherical particles are firstly developed,where Ta^(5+)doping enables the refined primary grain with a tightly stacked rod-like morphology.Comprehensive structural analysis via Neutron powder diffraction(NPD)and Synchrotron radiation X-ray diffraction(SXRD)reveals an expanded NaO_(2)slab and a reduction in Na site vacancy.The potential charge compensation mechanism is further illustrated by X-ray absorption spectroscopy(XAS)and X-ray photoelectron spectroscopy(XPS),unveiling a partial reduction from Ni^(3+)to Ni^(2+)with Ta^(5+)doping.In situ X-ray diffraction(in situ XRD)suggests that the decorated sample undergoes a volume change as low as 0.8%,in contrast with the pristine one(1.5%).Thus,the optimized sample with x=0.005 retains an enhanced capacity retention up to 70.4%at 1 C after 300 cycles in half-cell and delivers a high energy density of 251 Wh kg^(-1)(0.1 C)and with a good capacity retention of 81.0%at 1 C after 200 cycles in full-cell.Our findings provide new insights into the mechanism of high valence Ta^(5+)doping in stabilizing layered oxides cathode materials for SIBs.
基金supported by the National Key Research and Development Program“Renewable Energy and Thermal Power Coupling Integration and Flexible Operation Control Technology”(No.2019YFB1505400).
文摘Because of the rapid growth of new energy and the accompanying considerable uncertainty in the power market,the demand for flexibility in a power sys-tem has risen sharply.In the meantime,the market structure of auxiliary services has changed,resulting in market participants(MPs)benefiting less than expected from providing flexible services.To encourage MPs to provide flexibility,this study proposes a dynamic design framework for an auxiliary service compensation mech-anism.To evaluate the proposed framework,a case study is conducted,examining a peak-shaving service in Liao-ning province in northeast China.First,the operational status and limitations of the typical product,the peak-shaving service,in China’s flexibility auxiliary ser-vices market are analyzed.Then,taking into consideration the time value of the flexible products provided by the MPs,a dynamic mechanism for hierarchical compensation of flexibility auxiliary service costs is proposed,and a mathematical model aimed at optimizing the MPs’comprehensive income is constructed.The results show that,compared with the existing traditional mechanism,the proposed method can effectively guarantee fair remu-neration for the flexibility provider,while easing the tense supply-demand relationship in the flexibility market.
基金this study was supported by National Forestry Sci-ence and Technology Support Program (No.2006BAD03A15)Key laboratory of Forest Silvculture of the State Forestry Ministration’ Sus-tentation Fund
文摘On the basis of analysis of the present situation of the ecological benefit compensation in China and foreign countries, this paper discusses the necessity, principle and approach of establishing the compensation mechanism of forest ecological benefit, as well as compensation standard in order to provide scientific basis for further perfecting the compensation mechanism of forest ecological engineering benefit in China. It is suggested that setting up the compensation mechanism of forest ecological benefit can not only provide the steady funds source of managing and protecting forest resources, but resolve radically the dynamic and mechanism problems of commonweal forest ecological engineering construction, which will produce a widespread and profound influence on China forestry and ecological construction.
文摘The paper discusses methods to compensate for the costs incurred in the supply of forest ecological services （FES）, i.e. government dominated and market-based instruments as well as progress made so far in China. Factors which constrain the supply of these services and potential policy improvements are presented.
基金Project(41941018)supported by the National Natural Science Foundation of China for the Special Project FundingProject(22-JKCF-08)supported by the Study on in-situ Stress Database and 3D in-situ Stress Inversion Technology of Highway Tunnel in Shanxi Province,China+1 种基金Project(2022-JKKJ-6)supported by the Study on Disaster Mechanism and NPR Anchor Cable Prevention and Control of Coal Mining Caving Subsidence in Operating Tunnel in Mountainous Area,ChinaProject(BBJ2024032)supported by the Fundamental Research Funds for the Central Universities(PhD Top Innovative Talents Fund of CUMTB),China。
文摘A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced during the tunnel construction.To mitigate this problem,a support system was designed incorporating negative Poisson ratio(NPR)anchor cables with negative Poisson ratio effect.Physical model experiments,field experiments,and numerical simulation experiments were conducted to investigate the compensation mechanical behavior of NPR anchor cables.The large deformations of soft rocks in the Daliangshan Tunnel are caused by a high ground stress,a high degree of joint fracture development,and a high degree of surrounding rock fragmentation.A compensation mechanics support system combining long and short NPR anchor cables was suggested to provide sufficient counter-support force(approximately 350 kN)for the surrounding rock inside the tunnel.Comparing the NPR anchor cable support system with the original support system used in the Daliangshan tunnel showed that an NPR anchor cable support system,combining cables of 6.3 m and 10.3 m in length,effectively prevented convergence of surrounding rock deformation,and the integrated settlement convergence value remained below 300 mm.This study provides an effective scientific basis for resolving large deformation problems in deeply buried soft rocks in western transverse mountain areas.
基金Project supported by the National Natural Science Foundation of China (Grant No 50376029)
文摘The control problems of chaotic systems are investigated in the presence of parametric uncertainty and persistent external disturbances based on nonlinear control theory. By using a designed nonlinear compensator mechanism, the system deterministic nonlinearity, parametric uncertainty and disturbance effect can be compensated effectively. The renowned chaotic Lorenz system subjected to parametric variations and external disturbances is studied as an illustrative example. From the Lyapunov stability theory, sufficient conditions for choosing control parameters to guarantee chaos control are derived. Several experiments are carried out, including parameter change experiments, set-point change experiments and disturbance experiments. Simulation results indicate that the chaotic motion can be regulated not only to steady states but also to any desired periodic orbits with great immunity to parametric variations and external disturbances.
基金Supported by the Major and Special Entrust Project of National Social Science Fund(XZ1111)the Planning Fund Project of Ministry of Education(10YJAZH08)
文摘The Tibetan, Han and other ethnic people in Tibetan Autonomous Region labored hard to protect the forests and steppes and produce invisible ecological products. The forests and steppes in Qinghai -Tibet Plateau conserved water and added the Jinsha River. In order to achieve sustainable development, it needs to construct compensating mechanism inter Provinces between the upper Yangtze River and the middle and lower Yangtze River, to implement carbon sink trading, and to assist farmers and herdsmen in the Tibet to get rich as soon as possible.
基金We thank supported by the Fundamental Research Funds for the Central Universities(BBJ2024032)the Gansu Province Science and Technology Major Project(19ZD2GA005).
文摘NPR anchor cable is a new type of support material with negative Poisson's ratio effect,which is widely used in mine support because of its superb compensating mechanical effect.In order to study more deeply the support effect of NPR anchor cable in soft rock large deformation tunnel,indoor test,numerical simulation and field monitoring were used to study the strong weathering carbonaceous slate tunnel in Min County.The study shows that NPR anchor cable has extraordinary compensating mechanical behavior for soft rock large deformation tunnel,which can control the deformation of tunnel surrounding rock below 300 mm and keep the constant resistance value around 350 kN,which has obvious effect on the control of broken rock.To provide a basis for other research on support for large deformation tunnels in soft rock.
文摘Under the impetus of the“Dual Credit”policy,traditional fuel vehicle manufacturers are confronted with significant pressure to meet new energy vehicle credit requirements.To address this challenge,these manufacturers are increasingly adopting the Original Design Manufacturer(ODM)strategy to collaborate with new energy vehicle enterprises,thereby acquiring credits and expanding their market presence.However,this strategic approach not only intensifies competition between new energy and traditional fuel vehicle markets but also reshapes the profit distribution between the two types of firms.Drawing upon the framework of the Dual Credit policy,this study establishes a Cournot game model to examine the strategic interactions between traditional fuel vehicle manufacturers and new energy vehicle producers.It further investigates the optimal production decisions under the ODM strategy and evaluates their implications for market dynamics and corporate profitability.The findings reveal that,although the ODM strategy heightens market competition,it leads to substantial profit improvements for both types of manufacturers compared to the alternative of directly purchasing credits,while also fostering the growth of the new energy vehicle sector.Moreover,the Case study demonstrates micro-level impact of the dual credit policy on enterprises’response strategies,offering valuable insights for policymakers and industry decision-makers.
文摘Resonant and nonresonant intermolecular vibrational energy transfers in Gdm- SCN/KSCN=1/1, GdmSCN/KS^13CN=1/1 and GdmSCN/KS^13C^15N=1/1 mixed crystals in melts and in aqueous solutions are studied with the two dimensional infrared spectroscopy. The energy transfers in the samples are slower with a larger energy donor/acceptor gap, independent of the Raman spectra. The energy gap dependences of the nonresonant energy transfers cannot be described by the phonon compensation mechanism. Instead, the experi- mental energy gap dependences can be quantitatively described by the dephasing mechanism. Temperature dependences of resonant and nonresonant energy transfer rates in the melts are also consistent with the prediction of the dephasing mechanism. The series of results suggest that the dephasing mechanism can be dominant not only in solutions, but also in melts （pure liquids without solvents）, only if the molecular motions （translations and rotations） are much faster than the nonresonant energy transfer processes.
