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coupling and coordinated evolution characteristics of regional economy-energy-carbon emission multiple systems:A case study of main China's Basin

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Journal of Environmental Sciences 2024年第6期140卷 204-218页

作者： Lu Chen Xin Li Jingyi Zhao Xinyu Kang Lu Liu Minxi Wang Wu Chen College of Management Science Chengdu University of TechnologyChengdu 610051China SDU Life Cycle Engineering Department of Green TechnologyUniversity of Southern Denmark5230 OdenseDenmark

Comprehensive analysis of the Economy-Energy-Carbon Emission(EECE)system is beneficial for promoting sustainable social development.This study analyzes the system development of major watersheds in China from 2010 to 2019.The research fully considers the system’s internal and external inputs and outputs and proposes an evaluation index system for regional EECE coupling and coordinated development.Then,using the difference in system weight allocation to improve the coupling and coordination model,the study explores the dynamic system’s coupling and coordination.The results show that(1)The development of the system structure is relatively stable,but the overall development status is not ideal;(2)The downstream of China’s main river basins has obvious economic advantages,while the energy system fluctuates greatly.The efficiency of the carbon emission system will decrease in areas with rapid economic development.The coupling and coordination level of the EECE system is better in the Yangtze River Basin than in the Yellow River Basin;(3)From the perspective of dynamic coordinated development,the main river basins have been divided into two states since 2012,but it is relatively stable overall.Regional dynamic coordination is often at a disadvantage in regions with rapid economic and energy development;(4)The coupling coordination degree of the two river basins has significant positive spatial autocorrelation.Most provinces’significant spatial clustering characteristics of the coupling coordination degree are High-High type.Low-Low type provinces are mainly concentrated downstream.The research process has certain reference significance for the collaborative governance of complex regional systems.

关键词： System structure Efficiency measure coupling mechanism Dynamic coordination

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Tunable terahertz transmission behaviors and coupling mechanism in hybrid MoS_(2)metamaterials

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Chinese Physics B 2022年第1期31卷 248-254页

作者：邓雨旺周庆莉梁菀琳张朴婧张存林 Key Laboratory of Terahertz Optoelectronics Ministry of Educationand Beijing Advanced Innovation Center for Imaging Theory and TechnologyDepartment of PhysicsCapital Normal UniversityBeijing 100048China

A hybrid metamaterial with the integration of molybdenum disulfide(MoS_(2))overlayer is proposed to manipulate the terahertz(THz)wave.The simulated results indicate that the introduction of MoS_(2) layer could significantly modify the resonant responses with large resonance red-shift and bandwidth broadening due to the depolarization field effect,especially for the structure on the small permitivity substrate.Additionally,the wide-band modulator in off-resonant region and a switch effect at resonance can be achieved by varying the conductivity of MoS_(2) layer.Further theoretical calculations based on the Lorentz coupling model are consistent with the simulated results,explicating the response behaviors originate from the coupling between MoS_(2) overlayer and the metastructure.Our results could provide a possibility for active control THz modulator and switchable device based on the MoS_(2) overlayer and advance the understanding of the coupling mechanism in hybrid structures.

关键词： terahertz metamaterial MoS_(2) coupling mechanism switchable device

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coupling mechanism between Tamm Plasmon Polaritons and Monolayer WS_(2) Embedded in Metal/Dielectric Bragg Reflector Hybrid Architecture

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Journal of Wuhan University of Technology(Materials Science) 2021年第6期36卷 865-870页

作者：贾光一 YUE Ke YANG Wenxin 黄珍献 LIANG Qiqi LI Yin School of Science Tianjin University of CommerceTianjin 300134China

To reveal and utilize the interaction between Tamm plasmon polaritons(TPPs)and two-dimensional materials are promising for exploiting next-generation optoelectronic devices.Herein,the coupling mechanism between metal TPPs and monolayer WS_(2) along with its differences from that between metal TPPs and graphene was studied in detail by using the transfer matrix method.The experimental results show that it is difficult to excite TPPs at the boundary between monolayer WS_(2) and dielectric Bragg reflector(DBR)such that the strong coupling mainly stems from the interaction between metal TPPs and exciton in monolayer WS_(2).However,the coupling in graphene/DBR/metal hybrid structure derives from the interaction between two different TPP resonance modes.Thus,evolutions of Rabi splitting with various structural parameters including spacer thickness,incident angle and DBR period greatly differ from those observed in graphene/DBR/metal hybrid structure.In addition,the discrepancies induced via metal Ag and Au films as well as the possible influence mechanism were also discussed.

关键词： Tamm plasmon polaritons monolayer WS_(2) Rabi splitting coupling mechanism

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Epidemic Spreading–Information Dissemination coupling mechanism in Heterogeneous Areas

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Computers, Materials & Continua 2021年第6期67卷 3311-3327页

作者： Yang Yang Haiyan Liu Jianlin Zhou School of Economics and Management China University of Geosciences(Beijing)Beijing100083China

With COVID-19 continuing to rage around the world,there is a spread of epidemic-related information on social networking platforms.This phenomenon may inhibit or promote the scale of epidemic transmission.This study constructed a double-layer epidemic spreading–information dissemination network based on the movements of individuals across regions to analyze the dynamic evolution and coupling mechanism of information dissemination and epidemic transmission.We also proposed measures to control the spread of the epidemic by analyzing the factors affecting dynamic transmission.We constructed a state probability equation based on Markov chain theory and performed Monte Carlo simulations to demonstrate the interaction between information dissemination and epidemic transmission.The simulation results showed that the higher the information dissemination rate,the larger the scale of information dissemination and the smaller the scale of epidemic transmission.In addition,the higher the recovery rate of the epidemic or the lower the infection rate of the epidemic,the smaller the scale of information dissemination and the smaller the scale of epidemic transmission.Moreover,the greater the probability of individuals moving across regions,the larger the spread of the epidemic and information.Finally,the higher the probability of an individual taking preventive behavior,the smaller the spread of the epidemic and information.Therefore,it is possible to suppress epidemic spread by increasing the information dissemination rate,epidemic recovery rate,and probability of individuals taking preventive behavior,while also reducing the infection rate of the epidemic and appropriately implementing regional blockades.

关键词： coupling mechanism moving and regional individuals heterogenous areas double-layer coupling network

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The coupling characteristics and mechanism of farmland and rural housing land transition in China

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Journal of Geographical Sciences 2012年第3期22卷 548-562页

作者： Long Hualou Li Tingting Institute of Geographic Sciences and Natural Resources Research CAS Key Laboratory of Regional Sustainable Development Modeling CAS Graduate University of Chinese Academy of Sciences

Land use transition refers to the changes in land use morphology （both dominant morphology and recessive morphology） of a certain region over a certain period of time driven by socio-economic change and innovation, and it usually corresponds to the transition of socio-economic development phase. In China, farmland and rural housing land are the two major sources of land use transition. This paper analyzes the spatio-temporal coupling characteristics of farmland and rural housing land transition in China, using high-resolution Landsat TM （Thematic Mapper） data in 2000 and 2008, and the data from the Ministry of Land and Resources of China. The outcomes indicated that：（1） during 2000-2008, the correlation coefficient of farmland vs. rural housing land change is -0.921, and it shows that the change pattern of farmland and rural housing land is uncoordinated; （2） the result of Spearman rank correlation analysis shows that rural housing land change has played a major role in the mutual transformation of farmland and rural housing land; and （3） it shows a high-degree spatial coupling between farmland and rural housing land change in southeast China during 2000-2008. In general, farmland and rural housing land transition in China is driven by socio-economic, bio-physical and managerial three-dimensional driving factors through the interactions among rural population, farmland and rural housing land. However, the spatio-temporal coupling phenomenon and mechanism of farmland and rural housing land transition in China are largely due to the ＂dual-track＂ structure of rural-urban development.

关键词： land use transition farmland rural housing land coupling mechanism rural transformation development China

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The coupling mechanism between the suitable space and rural settlements considering the effect of mountain hazards in the upper Minjiang River basin

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Journal of Mountain Science 2020年第11期17卷 2774-2783页

作者： LIU Ying DENG Wei PENG Li The College of Geography and Resources Sichuan Normal UniversityChengdu 610101China

Some settlements were located in unsuitable regions due to limited land resources in mountainous areas,some settlements were even even constructed in areas prone to geological hazards in Southwest China.Therefore,it was important to evaluate the spatial appropriateness of a region and determine the areas that were unsuitable for settlements,and then find out the settlements located in unsuitable regions.It will assist in decision making associated with the relocation of settlements.Furthermore,it will be the key to ensure the safety of inhabitants and promoting sustainable development in mountainous areas.This study explored the coupling mechanism between suitable space and rural settlements in the upper Minjiang River basin,which is an ecologically fragile area with high-frequency of natural hazards.Firstly,we identified relief degree of land surface(RDLS),elevation,and disaster risk as the limiting factors.Then,by determining the thresholds of these limiting factors,we recognized the suitable areas for inhabitation in the upper Minjiang River basin with GIS.Finally,using the distribution map of rural settlements and that of suitable space,the distribution of rural settlements located at unsuitable area was obtained by coupling relationship analysis.Consequently,an in-depth understanding of this relationship was achieved as follows:(1)The suitable space of the upper Minjiang River basin is 13.7 thousand km2,accounting for 54.9%of the total land space;(2)There were 196 settlements located in the unsuitable area,the total area of these settlements was 125.27 km2,and there were 68000 people in these settlements,accounting for 17.65%of the total population;(3)There were 65 settlements located near mountain hazard areas,accounting for 4.9%of the total.These findings suggest that it was necessary to carefully investigate settlements with risks and develop targeted relocation policies to help find the most effective way of using land safely and to good effect.The details are as follows:(1)Fully consider the safety of r

关键词： coupling mechanism Sustainable Development Remote Sensing China

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A possible coupling mechanism between magnetism and dielectric properties in EuTiO3

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Chinese Physics B 2002年第12期11卷 1303-1306页

作者：蒋青吴华 DepartmentofPhysics SuzhouUniversitySuzhou215006China

The dielectric constant of an incipient ferroelectric EuTiO3 exhibits a sharp decrease at about 5.5K, at which the antiferromagnetic ordering of the Eu spins simultaneously appears. This fact indicates the existence of a coupling between the magnetism and dielectric properties of EuTiO3. We propose a possible coupling mechanism between the magnetic and electrical subsystems as -gIn the framework of soft-mode theory, we have obtained analytically a dielectric constant expression related to the spin correlation of nearest neighbours of Eu ions.

关键词： coupling mechanism magnetism dielectric property soft-mode theory

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Research on the coupling mechanism of Creative Spirit Cultivation and Scientific and Technological Innovation Development

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Journal of Contemporary Educational Research 2021年第8期5卷 155-160页

作者： Ning Wang Library The Party School of Anhui Provincial Committee(Anhui Administrative College)Hefei 230059AnhuiChina

Migration and innovation is the driving force of scientific and technological development.By analyzing the coupling relationship between the two,this paper finds out the common elements shared by the two factors,and constructs the coupling guarantee mechanism between them,so as to provide suggestions for the coordination,win-win and synchronous benign development of the spirit of makers and the development of scientific and technological innovation,and promote the sustainable development of the national innovation system.

关键词： Maker spirit Nurture Scientific and technological innovation and development coupling mechanism Path

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边疆安全治理现代化与周边安全共同体建设

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民族问题研究 2024年第3期

作者：方盛举杨睿哲

边疆安全是国家安全的重要构成部分，同时，边疆安全是国家安全的主要短板。推进国家安全体系和能力现代化，必须重点推进边疆安全体系和能力现代化。中国边疆地区与周边国家存在天然的地缘关系，边疆安全治理离不开与周边国家的联动协... 详细信息

边疆安全是国家安全的重要构成部分，同时，边疆安全是国家安全的主要短板。推进国家安全体系和能力现代化，必须重点推进边疆安全体系和能力现代化。中国边疆地区与周边国家存在天然的地缘关系，边疆安全治理离不开与周边国家的联动协同与互助合作。构建周边安全共同体旨在增强与周边国家之间的安全互信和利益共享，营造一个安全稳定、开放包容、互利共赢的周边环境。在推进边疆安全治理现代化的过程中，要主动经略和塑造周边国家的安全环境，把构建周边安全共同体作为这一进程的重要目标，以双边或多边安全预警预防机制、安全处置机制、安全能力建设机制等的耦合形成抓手，全面提升跨国跨境安全治理效能。

关键词：边疆安全治理周边安全共同体耦合机制 Frontier Security Governance Neighborhood Security Community coupling mechanism

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Numerical simulation and experimental validation of multiphysics field coupling mechanisms for a high power ICP wind tunnel

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Chinese Physics B 2021年第6期30卷 390-400页

作者：喻明浩王哲邱泽洋吕博郑博睿 Faculty of Mechanical and Precision Instrument Engineering Xi'an University of TechnologyXi'an 710048China School of Automation and Information Engineering Xi'an University of TechnologyXi'an 710048China

We take the established inductively coupled plasma(ICP) wind tunnel as a research object to investigate the thermal protection system of re-entry vehicles. A 1.2-MW high power ICP wind tunnel is studied through numerical simulation and experimental validation. The distribution characteristics and interaction mechanism of the flow field and electromagnetic field of the ICP wind tunnel are investigated using the multi-field coupling method of flow, electromagnetic, chemical, and thermodynamic field. The accuracy of the numerical simulation is validated by comparing the experimental results with the simulation results. Thereafter, the wind tunnel pressure, air velocity, electron density, Joule heating rate, Lorentz force, and electric field intensity obtained using the simulation are analyzed and discussed. The results indicate that for the 1.2-MW ICP wind tunnel, the maximum values of temperature, pressure, electron number density, and other parameters are observed during coil heating. The influence of the radial Lorentz force on the momentum transfer is stronger than that of the axial Lorentz force. The electron number density at the central axis and the amplitude and position of the Joule heating rate are affected by the radial Lorentz force. Moreover, the plasma in the wind tunnel is constantly in the subsonic flow state, and a strong eddy flow is easily generated at the inlet of the wind tunnel.

关键词： inductively coupled plasma multiphysics field coupling mechanism simulation and experiment

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