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Frontiers in Energy 2019年第3期13卷 597-602页

作者： Lijun wu Yu zhang Bingjiang LI Pengxiang WANG Lishuang FAN Naiqing zhang Kening SUN State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of TechnologyHarbin 150001China

VS4 has gained more and more attention for its high theoretical capacity (449 mAh/g with 3e^- transfer) in lithium ion batteries (LIBs). Herein, a layered structure VS4 anchored in graphene aerogels is prepared and first reported as cathode material for LIBs. VS4@GAs composite exhibits an exceptional high initial reversible capacity (511 mAh/g), an excellent high-rate capability (191 mAh/g at the 5 C), and an excellent cyclic stability (239 mAh/g after 15 cycles).

关键词： VS4 graphene aerogels cathode lithium storage

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全球安全倡议:内涵、意义与实践

国际问题研究 2022年第4期 39-57,139,140页

作者：吴晓丹张伟鹏习近平外交思想研究中心

面对错综复杂的国际安全形势,习近平主席深刻剖析当今世界面临的安全挑战,从人类前途命运出发提出全球安全倡议,为重建全球安全理性注入了中国元素,为弥补和平赤字、破解全球安全困境贡献了中国方案。中国是全球安全倡议的提出者,更是... 详细信息

面对错综复杂的国际安全形势,习近平主席深刻剖析当今世界面临的安全挑战,从人类前途命运出发提出全球安全倡议,为重建全球安全理性注入了中国元素,为弥补和平赤字、破解全球安全困境贡献了中国方案。中国是全球安全倡议的提出者,更是维护世界和平安宁的行动派。全球安全倡议的提出和实践,不仅体现了中国人民对实现自身安全发展目标的自信和自觉,更彰显了积极履行国际责任、促进世界和平发展的大国担当,为构建普遍安全的人类命运共同体指明了前进方向。

关键词：习近平外交思想全球安全倡议全球安全治理中国外交

Dual-ion carrier storage through Mg^(2+) addition for high-energy and long-life zinc-ion hybrid capacitor

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 179-185页

作者： Junjie zhang Xiang wu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

Cation additives can efficiently enhance the total electrochemical capabilities of zinc-ion hybrid capacitors (ZHCs).However their energy storage mechanisms in zinc-based systems are still under debate.Herein,we modulate the electrolyte and achieve dual-ion storage by adding magnesium ions.And we assemble several Zn//activated carbon devices with different electrolyte concentrations and investigate their electrochemical reaction dynamic behaviors.The zinc-ion capacitor with Mg^(2+)mixed solution delivers 82 mAh·g^(-1)capacity at 1 A·g^(-1) and maintains 91%of the original capacitance after 10000 cycling.It is superior to the other assembled zinc-ion devices in single-component electrolytes.The finding demonstrates that the double-ion storage mechanism enables the superior rate performance and long cycle lifetime of ZHCs.

关键词： zinc-ion hybrid capacitor MgSO_(4) electrolyte rate performance storage mechanism

Integrated strategy for real-time wind power fluctuation mitigation and energy storage system control

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Global Energy Interconnection 2024年第1期7卷 71-81页

作者： Yu zhang Yongkang zhang Tiezhou wu Hubei University of Technology Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation ControlHubeiWuhan 430068P.R.China

To address the impact of wind-power fluctuations on the stability of power systems,we propose a comprehensive approach that integrates multiple strategies and methods to enhance the efficiency and reliability of a system.First,we employ a strategy that restricts long-and short-term power output deviations to smoothen wind power fluctuations in real time.Second,we adopt the sliding window instantaneous complete ensemble empirical mode decomposition with adaptive noise(SW-ICEEMDAN)strategy to achieve real-time decomposition of the energy storage power,facilitating internal power distribution within the hybrid energy storage system.Finally,we introduce a rule-based multi-fuzzy control strategy for the secondary adjustment of the initial power allocation commands for different energy storage components.Through simulation validation,we demonstrate that the proposed comprehensive control strategy can smoothen wind power fluctuations in real time and decompose energy storage power.Compared with traditional empirical mode decomposition(EMD),ensemble empirical mode decomposition(EEMD),and complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN)decomposition strategies,the configuration of the energy storage system under the SW-ICEEMDAN control strategy is more optimal.Additionally,the state-of-charge of energy storage components fluctuates within a reasonable range,enhancing the stability of the power system and ensuring the secure operation of the energy storage system.

关键词： SW-ICEEMDAN HESS Real-time smoothing Rule-based multi-fuzzy control SoC

Neural Circuit Mechanisms Involved in Animals’Detection of and Response to Visual Threat

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Neuroscience Bulletin 2023年第6期39卷 994-1008页

作者： Qiwen wu Yifeng zhang Institute of Neuroscience Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China University of Chinese Academy of Sciences Beijing100049China

Evading or escaping from predators is one of the most crucial issues for survival across the animal kingdom.The timely detection of predators and the initiation of appropriate fight-or-flight responses are innate capabilities of the nervous system.Here we review recent progress in our understanding of innate visually-triggered defensive behaviors and the underlying neural circuit mechanisms,and a comparison among vinegar flies,zebrafish,and mice is included.This overview covers the anatomical and functional aspects of the neural circuits involved in this process,including visual threat processing and identification,the selection of appropriate behavioral responses,and the initiation of these innate defensive behaviors.The emphasis of this review is on the early stages of this pathway,namely,threat identification from complex visual inputs and how behavioral choices are influenced by differences in visual threats.We also briefly cover how the innate defensive response is processed centrally.Based on these summaries,we discuss coding strategies for visual threats and propose a common prototypical pathway for rapid innate defensive responses.

关键词： Looming Innate defensive behavior Escape Freezing Circuit mechanism Encoding

Estimation of state of health based on charging characteristics and back-propagation neural networks with improved atom search optimization algorithm

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Global Energy Interconnection 2023年第2期6卷 228-237页

作者： Yu zhang Yuhang zhang Tiezhou wu Hubei University of Technology Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation ControlHubeiWuhan 430068P.R.China

With the rapid development of new energy technologies, lithium batteries are widely used in the field of energy storage systems and electric vehicles. The accurate prediction for the state of health(SOH) has an important role in maintaining a safe and stable operation of lithium-ion batteries. To address the problems of uncertain battery discharge conditions and low SOH estimation accuracy in practical applications, this paper proposes a SOH estimation method based on constant-current battery charging section characteristics with a back-propagation neural network with an improved atom search optimization algorithm. A temperature characteristic, equal-time temperature variation(Dt_DT), is proposed by analyzing the temperature data of the battery charging section with the incremental capacity(IC) characteristics obtained from an IC analysis as an input to the data-driven prediction model. Testing and analysis of the proposed prediction model are carried out using publicly available datasets. Experimental results show that the maximum error of SOH estimation results for the proposed method in this paper is below 1.5%.

关键词： State of health Lithium-ion battery Dt_DT Improved atom search optimization algorithm

Effects of ZnO,FeO and Fe_(2)O_(3)on the spinel formation,microstructure and physicochemical properties of augite-based glass ceramics

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1207-1216页

作者： Shuai zhang Yanling zhang Shaowen wu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Augite-based glass ceramics were synthesised using ZnO,FeO,and Fe_(2)O_(3)as additives,and the spinel formation,matrix structure,crystallisation thermodynamics,and physicochemical properties were investigated.The results showed that oxides resulted in numerous preliminary spinels in the glass matrix.FeO,ZnO,and Fe_(2)O_(3)influenced the formation of spinel,while FeO simplified the glass network.FeO and ZnO promoted bulk crystallisation of the parent glass.After adding oxides,the grains of augite phase were refined,and the relative quantities of augite crystal planes were also influenced.All samples displayed good mechanical properties and chemical stability.The 2wt%ZnO-doping sample displayed the maximum flexural strength(170.3 MPa).Chromium leaching amount values of all the samples were less than the national standard(1.5 mg/L),confirming the safety of the materials.In conclusion,an appropriate amount of zinc-containing raw material is beneficial for the preparation of augite-based glass ceramics.

关键词： spinel network structure thermodynamics microstructure glass ceramics

Ant colonization increased total mercury but reduced methylmercury contents in boreal mires, Northeast China

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Journal of Environmental Sciences 2022年第9期34卷 50-58页

作者： Zhongsheng zhang Xuehui zhang Yuan Xin Haitao wu Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130012China University of Chinese Academy of Sciences Beijing 100049China Shengyang University Shenyang 110044China

Soil macroinvertebrates as ecosystem engineers play significant, but largely ignored, roles in affecting mercury(Hg) cycle by altering soil physical-chemical properties. Ant is likely expanded into boreal mires with climate warming, however, its impacts on Hg cycle remained poorly understood. We compared total Hg(THg) and methylmercury(Me Hg) contents in soils from antmounds( Lasius flavus) and the nearby ambient in a boreal mire in Northeast China. The present work seeks to unravel factors that controlling Me Hg levels in case of ant appearance or absence. The average THg was 179 μg/kg in the ant mound and was 106.1 μg/kg in nearby soils, respectively. The average Me Hg was 10.9 μg/kg in the ant mound and was 12.9 μg/kg in nearby soils, respectively. The ratios of Me Hg to THg(%Me Hg) were 7.61% in ant mounds and 16.75% in nearby soils, respectively. Ant colonization caused THg enrichment and Me Hg depletion, and this change was obvious in the 10-20 cm depth soil layer where ants mainly inhabited. Spectrometry characteristics of soil dissolved organic matter(DOM) exert a stronger control than microorganisms on Me Hg variation in soils. A structural equation model revealed that the molecular weight of DOM inhibited Me Hg irrespective of ant presence or absence, while humification conducive to Me Hg significantly in ant mound soils. Microorganisms mainly affected Hg methylation by altering the molecular weight and humification of DOM. We propose that the effects of ant colonization on Me Hg rested on DOM feature variations caused by microorganisms in boreal mires.

关键词： Ant colonization Mercury Methylmercury Boreal mire DOM spectrometry

Distributed consensus of Lurie multi-agent systems under directed topology:a contraction approach

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The Journal of China Universities of Posts and Telecommunications 2023年第6期30卷 11-21页

作者： zhang Xiaojiao wu Xiang School of Mathematics and Information Science Nanchang Normal UniversityNanchang 330032China School of Mathematical Sciences Guizhou Normal UniversityGuiyang 550001China

This paper is devoted to investigate the consensus problems for the multi-agent systems with Lurie nonlinear dynamics in directed topology.Under some assumptions,some sufficient conditions for the systems reaching leaderless consensus and tracking consensus are established by using contraction analysis theory.Compared with the existing results,there is no need to formulate the multi-agent networks in compact form.These conditions are only related to the individual agent in lower-dimensional case and the communication topology of the network.Additionally,a generalized nonlinear function is introduced.Finally,three numerical examples are demonstrated to illustrate the effectiveness of the theoretical results.

关键词： contraction theory virtual system partial contraction theory Lurie dynamics nonlinear multi-agent systems

Accumulation and relationship of metals in different soil aggregate fractions along soil profiles

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Journal of Environmental Sciences 2022年第5期34卷 47-54页

作者： Qian Shen Mengjie wu Mingkui zhang Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition College of Environmental&Resource SciencesZhejiang UniversityHangzhou 310058China

Different aggregates vary in their ability to retain or adsorb metals in soil.Five soil profiles were sampled from different soil horizons and grouped,and the concentrations of Al,Mg,Ca,Fe,Mn,Cd,Cu and Pb were determined in six sizes of aggregates(>2,2-1,1-0.6,0.6-0.25,0.25-0.053,<0.053 mm).Significantly high(p<0.05)structural stability indexes(SSI)and ag-gregate stability indexes(ASI)were recorded in the topsoil horizon,which may be attributed to the high soil organic matter(SOM)content in aggregates from topsoil.In addition,ASI and SSI were positively correlated(r=0.569,p<0.05)with each other,which indicated that the stability of soil aggregates could contribute to the structural stability of bulk soil.Moreover,accumulation factors(AF),principal component analysis(PCA)and Pearson's correlation co-efficients were used for metal element assessment.The results indicated that SOM was not a key factor affecting the accumulation of Ca,Mg,Al,Fe,Mn,Pb,Cd and Cu in soil aggre-gates.In general,AF values for metal elements in microaggregates(<0.25 mm)were high,which showed that metals preferred to accumulate in fine soil aggregates.The PCA and Pearson's correlation coefficients indicated that soil parent materials primarily controlled the distribution of Al,Ca,Fe,Mg and Mn,while materials derived from technogenic sources have important impacts on the distribution of Cd,Cu and Pb in soil aggregates along the soil profile.

关键词： Soil profile Aggregate Structural stability index(SSI) Aggregate stability index(ASI) Metals Accumulation factor(AF)