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Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

Science China Chemistry 2025年第01期 385-393页

作者： jianwei wang Huan wang Kangning wang Wenhui wang Wenlin Zhang Yanzhong Zhen School of Chemistry & Chemical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

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某混凝土筒仓结构设计研究

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山西建筑 2025年第2期51卷 37-43页

作者：张遥王建伟中冶京诚工程技术有限公司北京100176

圆形筒仓设计充分利用了薄壁筒壳结构的优越性,薄壁的配筋与受力、边缘效应、地震等因素有关,在设计过程中需要重点考虑。基于某实际工程案例,采用Midas Gen进行了整体建模计算,通过深仓贮料和浅仓贮料计算了筒仓侧壁的受力,并对各荷载... 详细信息

圆形筒仓设计充分利用了薄壁筒壳结构的优越性,薄壁的配筋与受力、边缘效应、地震等因素有关,在设计过程中需要重点考虑。基于某实际工程案例,采用Midas Gen进行了整体建模计算,通过深仓贮料和浅仓贮料计算了筒仓侧壁的受力,并对各荷载工况进行了分析。由于地震力对筒仓会产生较大影响,分析了不同地震工况下地震力的大小。在此基础上,贮料荷载对于仓壁的水平作用较为明显,通过荷载组合对筒仓侧壁进行设计研究。总结了侧壁配筋的控制因素,为筒仓设计提供帮助。

关键词：圆形筒仓深、浅仓模型有限元边缘效应

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基于系统动力学的应急物资协同储备模型研究

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灾害学 2025年第1期40卷 153-159页

作者：王剑伟凌大荣李德李睿赵爽陆军勤务学院重庆401311

该文探讨了在应急物资保障过程中,如何有效解决初期末端物资供应不足和后期物资库存过剩的问题。通过分析应急物资保障过程中的相关因素,运用先分解后耦合的系统工程法构建了应急物资协同储备系统动力学模型。以中国西南地区某省为例,... 详细信息

该文探讨了在应急物资保障过程中,如何有效解决初期末端物资供应不足和后期物资库存过剩的问题。通过分析应急物资保障过程中的相关因素,运用先分解后耦合的系统工程法构建了应急物资协同储备系统动力学模型。以中国西南地区某省为例,模拟应对较大规模地震灾害的情况,利用Vemsin PLE软件对模型进行分析,得到优化方案。研究表明:①加大末端物资储备量,尤其是交通不便地区,能有效应对前期物资需求;②通过调整末端与上级的期望物资使用天数,可大幅减少物资总库存量,提高经济性;③降低物资总库存量能减小库存波动幅度,增强物资供应链路的稳定性。通过上述分析,为优化应急物资储备模式提供了参考,有助于提升应急管理的效率和效果。

关键词：系统动力学应急物资协同储备模拟仿真

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EVOLUTIONARY ALGORITHMS WITH PREFERENCE FOR MANUFACTURING CELLS FORMATION

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Chinese Journal of Mechanical Engineering 2008年第1期21卷 111-115页

作者： wang jianwei WEI Xiaopeng LI Rui School of Mechanical Engineering Dalian University of Technology Dalian 116023 China Center for Advanced Design Technology Dalian University Dalian 116622 China

Due to the combinatorial nature of cell formation problem and the characteristics of multi-objective and multi-constrain, a novel method of evolutionary algorithm with preference is proposed. The analytic hierarchy process （AHP） is adopted to determine scientifically the weights of the sub-objective functions. The satisfaction of constraints is considered as a new objective, the ratio of the population which doesn＇t satisfy all constraints is assigned as the weight of new objective. In addition, the self-adaptation of weights is applied in order to converge more easily towards the feasible domain. Therefore, both features multi-criteria and constrains are dealt with simultaneously. Finally, an example is selected from the literature to evaluate the performance of the proposed approach. The results validate the effectiveness of the proposed method in designing the manufacturing cells.

关键词： Cell formation Genetic algorithm Cellular manufacturing Preference

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Changes in fish resources 5 years after implementation of the 10-year fishing ban in the Chishui River,the first river with a complete fishing ban in the Yangtze River Basin

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Ecological Processes 2023年第1期12卷 696-715页

作者： Fei Liu Zixin wang Zhijun Xia jianwei wang Huanzhang Liu Institute of Hydrobiology Chinese Academy of SciencesNo.7 Donghu South RoadWuchang DistrictWuhan 430072People’s Republic of China Dalian Ocean University Dalian 116023People’s Republic of China

Background To rehabilitate the depleted fish resources of the Yangtze River Basin,China,a 10-year fishing ban has been *** national initiative has attracted worldwide *** present study aimed to explore the ecological process and recovery effectiveness of this complete fishing ban in the Chishui River,the first river where the fishing ban was enacted in the Yangtze River *** in fish resources were analyzed based on investigations conducted 5 years before(2012–2016)and 5 years after(2017–2021)the implementation of the fish-ing ban in four reaches along the longitudinal *** A total of 140 fish species,including 127 native and 13 exotic species,were collected during the study *** number of fish species as well as the diversity indices showed no significant temporal ***,11 native species that had disappeared for many years appeared again after the fishing *** occurrence rates of some key protected species,Procypris rabaudi,Acipenser dabryanus,Euchiloglanis davidi and Myxocyprinus asiaticus,increased after the fishing ban,while Coreius guichenoti,Percocypris pingi,Onychostoma angustistomata and Leptobotia rubrilabris showed no obvious *** fish assemblage structure in nearly all reaches(except the headwater)showed significant temporal changes with an increase in the relative abundance of larger body-sized *** population structure of most dominant species improved greatly with the mean standard length and the mean body weight as well as the proportion of larger-sized individuals clearly *** addition,the density of fishes changed dramatically with the catch per unit effort(CPUE)increasing by 140–210%for different study *** The present study confirmed that the complete fishing closure is an effective measure to facilitate fish resources *** results provide valuable references for evaluating the effectiveness of the 10-year fishing ban policy in the entire

关键词： The Yangtze River Fishing ban The Chishui River Fish resources Biodiversity conservation

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Characteristics Prediction Method of Electro-hydraulic Servo Valve Based on Rough Set and Adaptive Neuro-fuzzy Inference System

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Chinese Journal of Mechanical Engineering 2010年第2期23卷 200-208页

作者： JIA Zhenyuan MA jianwei wang Fuji LIU Wei Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education Dalian University of Technology Dalian 116024 China

Synthesis characteristics of the electro-hydraulic servo valve are key factors to determine eligibility of the hydraulic production. Testing all synthesis characteristics of the electro-hydraulic servo valve after assembling leads to high repair rate and reject rate, so accurate prediction for the synthesis characteristics in the industrial production is particular important in decreasing the repair rate and the reject rate of the product. However, the research in forecasting synthesis characteristics of the electro-hydraulic servo valve is rare. In this work, a hybrid prediction method was proposed based on rough set（RS） and adaptive neuro-fuzzy inference system（ANFIS） in order to predict synthesis characteristics of electro-hydraulic servo valve. Since the geometric factors affecting the synthesis characteristics of the electro-hydraulic servo valve are from workers＇ experience, the inputs of the prediction method are uncertain. RS-based attributes reduction was used as the preprocessor, and then the exact geometric factors affecting the synthesis characteristics of the electro-hydraulic servo valve were obtained. On the basis of the exact geometric factors, ANFIS was used to build the final prediction model. A typical electro-hydraulic servo valve production was used to demonstrate the proposed prediction method. The prediction results showed that the proposed prediction method was more applicable than the artificial neural networks（ANN） in predicting the synthesis characteristics of electro-hydraulic servo valve, and the proposed prediction method was a powerful tool to predict synthesis characteristics of the electro-hydraulic servo valve. Moreover, with the use of the advantages of RS and ANFIS, the highly effective forecasting framework in this study can also be applied to other problems involving synthesis characteristics forecasting.

关键词： characteristics prediction rough set adaptive neuro-fuzzy inference system electro-hydraulic servo valve,artificial neural networks

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High-dimensional quantum information processing on programmable integrated photonic chips

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Science China(Information Sciences) 2023年第8期66卷 5-22页

作者： Yulin CHI Yue YU Qihuang GONG jianwei wang State Key Laboratory for Mesoscopic Physics School of Physics Peking University Frontiers Science Center for Nano-optoelectronics and Collaborative Innovation Center of Quantum Matter Peking University Peking University Yangtze Delta Institute of Optoelectronics Collaborative Innovation Center of Extreme Optics Shanxi University Hefei National Laboratory

This study reviews the recent progress of high-dimensional quantum information processing with photons. We first introduce the basic language of high-dimensional quantum information, including the representation of quantum dits(qudits), unitary operations of qudit states, and the general format of quantum algorithms with qudits. We discuss experimental implementations of high-dimensional quantum information processing and quantum computing in photonic systems, particularly in integrated quantum photonic platforms. We also discuss how qudit-based quantum photonic devices and systems can be adopted for further improving qubit-based quantum computation and quantum simulation.

关键词： high-dimensional quantum information processing quantum computation integrated quantum photonics

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Theoretical and Experimental Study on the Performance of Hermetic Diaphragm Squeeze Film Dampers for Gas-Lubricated Bearings

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 151-169页

作者： jianwei wang Haoxi Zhang Shaocun Han Hang Li Peng wang Kai Feng State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

Low damping characteristics have always been a key sticking points in the development of gas *** application of squeeze film dampers can significantly improve the damping performance of gas lubricated *** paper proposed a novel hermetic diaphragm squeeze film damper(HDSFD)for oil-free turbomachinery supported by gas lubricated *** types of HDSFDs with symmetrical structure were proposed for good damping *** considering the compressibility of the damper fluid,based on hydraulic fluid mechanics theory,a dynamic model of HDSFDs under medium is proposed,which successfully reflects the frequency dependence of force *** on the dynamic model,the effects of damper fluid viscosity,bulk modulus of damper fluid,thickness of damper fluid film and plunger thickness on the dynamic stiffness and damping of HDSFDs were *** experimental test rig was assembled and series of experimental studies on HDSFDs were *** damper fluid transverse flow is added to the existing HDSFD concept,which aims to make the dynamic force coefficients independent of *** the force coefficient is still frequency dependent,the damping coefficient at high frequency excitation with damper fluid supply twice as that without damper fluid *** results serve as a benchmark for the calibration of analytical tools under development.

关键词： Hermetic diaphragm squeeze film damper Compressibility Dynamic model Experimental studies

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Pitch-derived 3D amorphous carbon encapsulated sulfur-rich cathode for aqueous Zn-S batteries

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Science China Chemistry 2023年第9期66卷 2711-2718页

作者： Kangning wang jianwei wang Ziqi Zhang Wenlin Zhang Feng Fu Yaping Du School of Chemistry&Chemical Engineering Yan’an UniversityYan’an 716000China Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsHaihe Laboratory of Sustainable Chemical TransformationsSmart Sensing Interdisciplinary Science CenterSchool of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin 300350China

Rechargeable aqueous zinc batteries have attracted much attention due to their high security, plentiful zinc resources, and environmental friendliness. However, it can only offer limited specific capacity and energy density based on ion insertion chemistry cathode. Herein, we design a low-cost and high-energy density aqueous Zn-S battery where the conversion cathode was fabricated by pitch-derived three-dimensional(3D) amorphous carbon encapsulated industrial-grade sulfur powder. The cost of the chemical substances for this aqueous Zn-S battery might be reduced to $9.38 per kW h based on the affordable cost of the raw ingredients. It is found that the PAC/S-60.33% cathode reveals excellent electrochemical performance, including a high reversible capacity(633.5 mAh g^(-1)at 0.5 A g^(-1)), high energy density(297.5 Wh kg^(-1)), an excellent rate capability(204.5 mAh g^(-1) at 5.5 A g^(-1)), as well as good cycling stability(180 mAh g^(-1)after 400 cycles at 5.0 A g^(-1)). Besides, the reaction mechanism of the cathode was investigated using ex-situ X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), and transmission electron microscope(TEM). It was demonstrated that the cathode undergoes a conversion reaction between S and Zn S. Furthermore, the discoveries also offer prospective possibilities to fabricate more secure and inexpensive battery systems.

关键词： pitch 3D amorphous carbon sulfur-rich aqueous Zn-S batteries

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Reproduction Diversity of Enteromorpha prolifera

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Journal of Integrative Plant Biology 2008年第5期50卷 622-629页

作者： Apeng Lin Songdong Shen jianwei wang Binlun Yan Life Sciences School Soochow University Suzhou 215123 China Marine Biotechnology Key Construction Laboratory Huaihai Institute of Technology Lianyungang 226001 China

Enteromorpha prolifera （Muell.） J. Agardh （Chlorophyta, Ulvophyceae）. which is distributed widely in the inter-tidal zone of the ocean, is one of the most common fouling green algae. However, the present understandings of the life history of E. profifera have been insufficient to explain their seasonal abundances. Thus it is essential to investigate how many reproductive strategies are likely to contribute to the successful colonization and flourishing of the green alga. In the present study the reproduction diversity of E. prolifera was observed and studied systematically by culturing chopped tissues. Our results showed that there are in total seven pathways of reproduction for E. prolifera including sexual, asexual and vegetative reproduction, it was indicated that the variety of the reproductive ways and the large quantity of reproductive cells produced and released during the reproductive season are the two key factors that facilitate colonization of E. prolifera. The reproduction of the alga E. prolifera mainly depends on asexual methods. The results presented here contribute to increasing our understanding about how the opportunistic macroalgae successfully maintain colonization and excessive growth.

关键词： colonization Life history macroalgal blooms propagation tissue culture.

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