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Anderson localization of a spin–orbit coupled Bose–Einstein condensate in disorder potential

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Chinese Physics B 2022年第7期31卷 133-139页

作者： Huan zhang Sheng Liu yongsheng zhang CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China

We present numerical results of a one-dimensional spin–orbit coupled Bose–Einstein condensate expanding in a speckle disorder potential by employing the Gross–Pitaevskii *** properties of a spin–orbit coupled Bose–Einstein condensate in zero-momentum phase,magnetic phase and stripe phase are *** is found that the localizing behavior in the zero-momentum phase is similar to the normal Bose–Einstein ***,in both magnetic phase and stripe phase,the localization length changes non-monotonically as the fitting interval *** magnetic phases,the Bose–Einstein condensate will experience spin relaxation in disorder potential.

关键词： Bose–Einstein condensates Anderson localization spin–orbit coupling

Summertime Atmospheric Teleconnection Pattern Associated with a Warming over the Eastern Tibetan Plateau

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Advances in Atmospheric Sciences 2009年第3期26卷 413-422页

作者：朱伟军 yongsheng zhang Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science and Technology Nanjing 210044 International Pacific Research Center University of Hawaii at Manoa Honolulu 96822 USA

By using a surface air temperature index （SATI） averaged over the eastern Tibetan Plateau （TP）, investigation is conducted on the short-term climate variation associated with the interannual air warming （or cooling） over the TP in each summer month. Evidence suggests that the SATI is associated with a consistent teleconnection pattern extending from the TP to central-western Asia and southeastern Europe. Associated rainfall changes include, for a warming case, a drought in northern India in May and June, and a stronger mei-yu front in June. The latter is due to an intensified upper-level northeasterly in eastern China and a wetter and warmer condition over the eastern TP. In the East Asian regions, the time-space distributions of the correlation patterns between SATI and rainfall are more complex and exhibit large differences from month to month. Some studies have revealed a close relationship between the anomalous heating over the TP and the rainfall anomaly along the Yangtze River valley appearing in the summer on a seasonal mean time-scale, whereas in the present study, this relationship only appears in June and the signal＇s significance becomes weaker after the long-term trend in the data was excluded. Close correlations between SATI and the convection activity and SST also occur in the western Pacific in July and August： A zonally-elongated warm tone in the SST in the northwestern Pacific seems to be a passive response of the associated circulation related to a warm SATI. The SATI-associated teleconnection pattern provides a scenario consistently linking the broad summer rainfall anomalies in Europe, central-western Asia, India, and East Asia.

关键词： teleconnection pattern short-term climate variation Tibetan Plateau surface air temperature

Active cation-integration high-entropy Prussian blue analogues cathodes for efficient Zn storage

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Nano Research 2023年第2期16卷 2486-2494页

作者： Jiangyuan Xing yongsheng zhang Yang Jin Qianzheng Jin School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001China

Mn-based Prussian blue analogues(Mn-PBAs),featuring a three-dimensional(3D)metal-organic framework and multiple redox couples,have gained wide interests in Zn-ion batteries(ZIBs).However,owing to the Jahn-Teller distortion and disproportionation reaction of Mn^(3+),these materials suffer from poor electrochemical performances and inferior structural ***,we prepare a typical high-entropy Prussian blue analogue(HE-PBA)with increased configuration entropy through integrating five transition metal elements of Mn,Co,Ni,Fe and Cu into the nitrogen-coordinated-M-lattice ***,the HE-PBA presents enhanced uptake of Zn^(2+)with 80 mAh·g^(−1)compared to those medium-entropy PBAs,low-entropy PBAs and conventional PBAs,which can be assigned to“cocktail”effect of multiple transition metal active redox ***,a phase transition process from monoclinic phase to rhombohedral phase occurs in HE-PBA cathode,resulting in a stable structure of MN6(M=Mn,Co,Fe,Ni,Cu)and ZnN4 co-linked to FeC6 through the cyanide ***,the advantages of entropy-driven stability are also confirmed by the calculated reduction energy and the density of states between HE-PBA and KMn[Fe(CN)6](KMnHCF).This work not only presents a high-performance HE-PBA cathode in ZIBs,but also introduces a novel concept of high entropy benefiting for designing advanced materials.

关键词： high-entropy materials Prussian blue analogues phase transformation secondary batteries zinc-ion batteries

Extended scintillation phase gradient autofocus in future spaceborne P-band SAR mission

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Science China(Information Sciences) 2021年第11期64卷 216-232页

作者： Yifei JI Zhen DONG yongsheng zhang Qilei zhang Baidong YAO College of Electronic Science and Technology National University of Defense Technology East China Research Institute of Electronic Engineering

A future spaceborne P-band synthetic aperture radar(SAR) working system will be inevitably influenced by ionospheric scintillation, which tends to cause azimuth decorrelation and azimuth-imaging degradation. The scintillation phase error(SPE) history spatially varies by 2 D scenes, and this leads to the complexity of SPE estimation and compensation. In this paper, to address this problem, an approach based on the extended scintillation phase gradient autofocus(ESPGA) technique has been proposed. ESPGA is composed of three modules: local estimation, overall estimation, and correction. First, it employs the block PGA(BPGA) to estimate SPE associated with the local block. Second, by taking advantage of information redundancy of SPE estimates, azimuth splicing and range interpolation are applied to estimate the overall SPE distribution across the whole scene. Then, the estimation result corresponding to the overall SPE is considered to compensate the spatial-variant SPE and mitigate scintillation impacts on the spaceborne SAR images. Finally, a processing experiment based on a simulated image derived from an airborne P-band SAR real scene is conducted to demonstrate the effectiveness of the proposed methodology.

关键词： synthetic aperture radar (SAR) ionospheric scintillation scintillation phase error (SPE) extended scintillation phase gradient autofocus (ESPGA) spaceborne P-band SAR

Combustion and Self-Desulfurization Characterization of Blended Low-Rank Coals for Improved Resource Utilization in Fluidized Bed Boilers

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Journal of Thermal Science 2024年第3期33卷 1242-1256页

作者： SU Lipeng zhang Cong zhang yongsheng WANG Tao WANG Jiawei Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of EducationNorth China Electric Power UniversityBeijing102206China

The co-combustion of low-rank coals through fluidized bed boiler(CFB)is an effective approach to enhance the level of resource *** date,there has been a lack of investigation concerning the co-combustion kinetics and self-desulfurization characteristics of coal slime,coal gangue,and raw *** this study,we adopted multiple model-free and model-fitting methods to comparatively analyze co-combustion kinetics of blended coals on the basis of thermogravimetric ***,the sulfur balance and self-desulfurization of blended coals in the co-combustion were intensively investigated using a tube furnace *** results reveal that in the presence of coal gangue in blended coals,the average activation energy(E_(a))falls within the range of 65.7 kJ/mol to 100.4 kJ/mol,as determined by four model-free ***,in the absence of coal gangue,only the Flynn-Wall-Ozawa(FWO)and Friedman(FM)methods are deemed appropriate for calculating the average E_(a),yielding a value of 77.3 kJ/*** first order reaction model is confirmed to be reliable for analyzing the co-combustion kinetics of low-rank blended *** of the specific composition of the blended coal,a significant linear correlation exists between the Ea and the natural logarithm of the pre-exponential factor(lnA)within an extensive range of ***,the addition of coal gangue to the blended coal substantially enhances the self-desulfurization level,resulting in an increase from 25.7%to60.7%at 1073 *** self-desulfurization efficiency exhibits a good linear relationship with both the mass ratio of coal gangue to coal slime and the molar ratio of calcium to *** a practical implementation,the optimal addition ratio of coal gangue is a trade-off between the self-desulfurization efficiency and the ignition capacity.

关键词： coal slime coal gangue fluidized bed boilers self-desulfurization resource utilization

Quantum entanglement and quantum operation

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Science China(Physics,Mechanics & Astronomy) 2008年第1期51卷 14-21页

作者： YE MingYong zhang yongsheng GUO GuangCan Key Laboratory of Quantum Information Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China

It is a simple introduction to quantum entanglement and quantum *** authors focus on some applications of quantum entanglement and relations between two-qubit entangled states and unitary *** includes remote state preparation by using any pure entangled states,nonlocal operation implementation using entangled states,entanglement capacity of two-qubit gates and two-qubit gates construction.

关键词： quantum entanglement quantum operation remote state preparation(RSP)

China's Green Urbanization in the Perspective of Ecological Civilization

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Chinese Journal of Urban and Environmental Studies 2021年第1期9卷 7-23页

作者： zhang yongsheng Research Institute for Eco-civilization (RIEco) Chinese Academy of Social Sciences (CASS)

This paper proposes a conceptual framework and a strategic idea for China s green urbanization from the perspective of ecological *** existing urbanization model—whether the activities carried out in the city or the city’s organization form—is largely a product of the traditional industrial era China must think outside the traditional industrial box and promote green urbanization based on ecological civilization which is the fundamental solution to address the unsustainable development of *** urbanization is more like"building cities in(natural) parks",rather than building parks in existing cities",that is,creating a prosperous economy without destroying but making full use of the natural ecological *** means there will be profound changes to the development concept,the activity carried out in the city,the city’s organizational logic,and the implications of the regional ***’s green urbanization based on ecological civilization should focus on three basic tasks and two *** three tasks are to reshape the existing cities,urbanize the newly added population in a green way,and redefine the rural *** two key strategies are to realize green urbanization of urban clusters that account for more than 90% of the national GDP,70% of the total population,and 30% of the land area;and to urbanize county-level areas where about 60% of the national population resides.

关键词： Ecological civilization green urbanization urban cluster regional integrated development.

Reshaping the Relationship between Environment and Development:A Theoretical Framework under the Paradigm of Eco-civilization and Its Policy Implications

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Social Sciences in China 2023年第1期44卷 44-72页

作者： zhang yongsheng University of Chinese Academy of Social Sciences Research Institute for Eco-civilizationCASS

This study investigates the sustainability implications of the theoretical models of industrialization and urbanization pioneered by Dixit and Stiglitz^(1) so to open the theoretical “black box” of the unsustainability of the traditional industrialization mode, and shows how to reshape the relationship between the environment and development under the paradigm of ecological civilization. It finds that the theoretical models that “perfectly” simulate the traditional industrialization mode all have the implicit consequence of environmental unsustainability. Nonetheless, this limitation is not due to the problems of the models themselves but is more a result of the limitations of the traditional developmental and neoclassical economics paradigms of the industrial era. Therefore, the consequences of unsustainability cannot simply be avoided through external policies such as technological progress and environmental regulations, nor can they be prevented by simply adjusting some parameters in these theoretical models. Instead, a shift is required in both the developmental and the economics paradigms formed in the traditional industrial era. From an ecological civilization perspective, this study rethinks the basic issues of economics along the two lines of the ends(what) and the means(how) of development;briefly reviews the history of economic thought;and uses a conceptual framework to reorganize the relevant intellectual profundities that are neglected in standard neoclassical economics. The study further formalizes the conceptual framework in a general form model and shows how a paradigm shift in development could shift the trade-offs from the multiple goals of the economy, the environment, and well-being in the traditional industrial era to mutual reinforcement in ecocivilization.

关键词： environment and development ecological civilization paradigm shift of development Dixit and Stiglitz model theoretical models of industrialization theory of urbanization

Climate Change and Green Growth:A Perspective of the Division of Labor

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China & World Economy 2014年第5期22卷 93-116页

作者： yongsheng zhang Development Research Center of the State Council of China

This paper presents a new research agenda on climate change and green growth from the perspective of the division of labor in classical economics. The paper covers three major dimensions of green growth （i.e. carbon emissions, environmental proteetion and material resources use） and some related important topics, as well as the fresh policy implications of the new research agenda, Typical marginal analysis in a given structure of the division of labor suggests that ＂green＂ action is a burden to economic development. Therefore, climate negotiation has become a burden-sharing game and has reached a stalemate. New thinking is badly needed to rescue these negotiations and to drive a shift to a new ＂green growth＂ paradigm. The proposed new research agenda represents an effort to create a new narrative on climate change and green growth. Because the new research agenda can theoretically predict the possibility that a more competitive structure of the division of labor could be triggered by ＂＇green ＂＇ policy, it has promising policy implications for various important challenges facing us in the 21st century.

关键词： climate change division of labor green growth specialization