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CES Transactions on Electrical Machines and Systems 2023年第3期7卷 237-238页

作者： Xuhui Wen Tao Fan Dong Jiang Yinye Yang Xin Zhang Yan Xu Xinhua Guo Shuangxia Niu Chaohui Liu Yihua Hu Pinjia Zhang Zhaoshun Gao Puqi Ning Institute of Electrical Engineering Chinese Academy of Sciences academic degree commission of iee cas Electric Vehicle Committee of China Electrotechnical Society Institute of Electrical Engineering of the Chinese Academy of Sciences Huazhong University of Science and Technology Mc Master University Zhejiang University Nanyang Technological University Huaqiao University Hong Kong Polytechnic University The National New Energy Vehicle Technology Innovation Center The University of York Tsinghua University

THE rapid growth of new energy vehicles is accelerating the low-carbon transition in the global transportation sector. According to the international energy agency report, more than 10 million electric vehicles(EVs) including pure electric and hybrid models were sold worldwide in 2022, which means that the global share of electric vehicles in the overall automotive market has risen from less than 5% in 2020 to 14% in 2022.

关键词： automotive transportation risen

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The scientific foundation of Major Function Oriented Zoning in China

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Journal of Geographical Sciences 2009年第5期19卷 515-531页

作者：樊杰李平星 Institute of Geographic Sciences and Natural Resources Research CAS Graduate University of Chinese Academy of Sciences

Major function oriented zoning （MFOZ hereafter） is the guideline for optimizing the spatial pattern of regional development in China, which entails both theoretical and methodological innovation in the academic field of economic geography. This study analyzes the basic features of territorial function and puts forward a spatial equilibrium model for regional development for the first time. It argues that there exists a trend of regional convergence in the average value which indicates the comprehensive development status of any region. Based on this finding, the study illustrates that the formation of functional zone should be conducive to the narrowing of regional gap and that free flow of resources between regions is the prerequisite to spatial equilibrium. It also investigates the impact of territorial functional evolution on the process of spatial equilibrium and suggests that the maximization of benefits derived from zoning proposal is interrelative with the method of regional division and the degree of understanding towards the temporal changes of territorial function. Furthermore, this study goes on to examine the scientific foundation of several issues concerning the reconciliation between contradictory functions of development and protection, the selection of indicators and the spatial and temporal features of MFOZ. It is then probes into the rationality of achieving dual goals of efficiency and equality simultaneously through three-dimensional flow and spatial equilibrium. The paper ends with discussions on the position, implementation and coordination of MFOZ from the perspective of institutional arrangements of spatial governance including law, planning and government policy.

关键词： territorial function MFOZ regional development spatial equilibrium spatial governance spatialplanning regional policy

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Quantum squeezing enhancement based on phase-sensitive cascaded four-wave mixing processes

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 73-78页

作者： Yanbo Lou Yingxuan Chen Jiabin Wang Shengshuai Liu Jietai Jing State Key Laboratory of Precision Spectroscopy Joint Institute of Advanced Science and TechnologySchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China cas Center for Excellence in Ultra-intense Laser Science Shanghai 201800China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Quantum squeezing is an important quantum resource for quantum metrology as it can improve the measurement *** enhancing the quantum squeezing level,the measurement precision can be further ***,we experimentally implement quantum squeezing enhancement based on phase-sensitive cascaded four-wave mixing(CFWM)*** intensitydifference squeezing(IDS)between the two outputs of the phase-sensitive CFWM processes is enhanced to about 7.42 dB compared with IDS generated by the single four-wave mixing(FWM)process(about 3.31 or 4.01 dB).Such enhancement is enabled by both the intrinsic interference nature of phase-sensitive CFWM processes and the contribution of more gain from the two FWM *** addition,we measure IDS levels generated by phase-sensitive CFWM processes at different internalphase-locking points,which shows that the internal phase plays an important role in IDS *** scheme provides a new method for improving the degree of IDS and may find potential applications in enhancing the measurement precision in quantum metrology.

关键词： quantum optics quantum squeezing four-wave mixing

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