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Electrode/Electrolyte Optimization-Induced Double-Layered Architecture for High-Performance Aqueous Zinc-(Dual) Halogen Batteries

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NANO-MICRO LETTERS 2025年第1期17卷 1-17页

作者： Zhou, Chengwang Ding, Zhezheng Ying, Shengzhe Jiang, Hao Wang, Yan Fang, Timing zhang, you Sun, Bing Tang, Xiao Liu, Xiaomin Qingdao Univ Sch Text & Clothing Sch Chem & Chem Engn Qingdao 266071 Shandong Peoples R China Univ Technol Sydney Fac Sci Ctr Clean Energy Technol Sch Math & Phys Sci Ultimo NSW 2007 Australia Henan Normal Univ Sch Chem & Chem Engn Xinxiang 453007 Henan Peoples R China

A double-layered protective film based on zinc-based coordination compound and ZnF2-rich solid electrolyte interphase layer has been successfully fabricated on the zinc metal anode via electrode/electrolyte synergistic *** double-layered architecture can effectively modulate Zn2+ flux and suppress the zinc dendrite growth, thus facilitating the uniform zinc *** as-developed zinc-(dual) halogen batteries based on double-layered protective film can present high areal capacity and satisfactory cycling stability. Aqueous zinc-halogen batteries are promising candidates for large-scale energy storage due to their abundant resources, intrinsic safety, and high theoretical capacity. Nevertheless, the uncontrollable zinc dendrite growth and spontaneous shuttle effect of active species have prohibited their practical implementation. Herein, a double-layered protective film based on zinc-ethylenediamine tetramethylene phosphonic acid (ZEA) artificial film and ZnF2-rich solid electrolyte interphase (SEI) layer has been successfully fabricated on the zinc metal anode via electrode/electrolyte synergistic optimization. The ZEA-based artificial film shows strong affinity for the ZnF2-rich SEI layer, therefore effectively suppressing the SEI breakage and facilitating the construction of double-layered protective film on the zinc metal anode. Such double-layered architecture not only modulates Zn2+ flux and suppresses the zinc dendrite growth, but also blocks the direct contact between the metal anode and electrolyte, thus mitigating the corrosion from the active species. When employing optimized metal anodes and electrolytes, the as-developed zinc-(dual) halogen batteries present high areal capacity and satisfactory cycling stability. This work provides a new avenue for developing aqueous zinc-(dual) halogen batteries.

关键词： Zn metal anodes Double-layered protective film Electrode/electrolyte optimization Aqueous zinc-(dual) halogen batteries

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A family of symmetric mixed finite elements for linear elasticity on tetrahedral grids

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Science China Mathematics 2015年第2期58卷 297-307页

作者： HU Jun zhang Shang you LMAM and School of Mathematical Sciences Peking University Department of Mathematical Sciences University of Delaware

A family of stable mixed finite elements for the linear elasticity on tetrahedral grids are constructed,where the stress is approximated by symmetric H(div)-Pk polynomial tensors and the displacement is approximated by C-1-Pk-1polynomial vectors,for all k *** main ingredients for the analysis are a new basis of the space of symmetric matrices,an intrinsic H(div)bubble function space on each element,and a new technique for establishing the discrete inf-sup *** particular,they enable us to prove that the divergence space of the H(div)bubble function space is identical to the orthogonal complement space of the rigid motion space with respect to the vector-valued Pk-1polynomial space on each *** optimal error estimate is proved,verified by numerical examples.

关键词： mixed finite element symmetric finite element linear elasticity conforming finite element tetrahedral grid inf-sup condition

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Geometric Structures and Field Equations of Dirac-Lu Space

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Communications in Theoretical Physics 2008年第11期50卷 1151-1154页

作者： REN Xin-An zhang Li-you Department of Mathematics China University of Mining and Technology Xuzhou 221116 China Institute of Applied Mathematics Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100080 China Institute of Mathematics Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100080 China

In this paper,a■-invariant Lorentz metric on the Dirac-Lu space is given,and then the geodesic equationis ***,we discuss the field equations and find their solutions by the method of separating variables.

关键词： Dirac-Lu space Lorentz metric Yang-Mills equation Dirac equation

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Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

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Journal of Rare Earths 2001年第2期19卷 157-160页

作者：魏幼璋 Zhejiang Univ Dept Soil Sci & Agrochem Hangzhou 310029 Peoples R China

Observation xith the transmission electronic microscopy shows that Nd can not enter into the cytoplasm of oilseed rape (brassica napus L.) in solution culture. It combines with the cell wall or amasses in the intercellular space. Nd accumulates in root tip after it enters into the plants, while only a small amount of Nd is transferred to the stem and leaf via apoplasm, and the leaf contains the least of Nd. Such observations are consistent with the analytical results of Nd distribution in rape tissues in soil culture experiment. It suggests that the physiological effects of Nd in plants might mainly function on plasmalemma of root system.

关键词： Biology Transmission electron microscopy Transportation

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Numerical investigation on the flow and power of small-sized multi-bladed straight Darrieus wind turbine

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1414-1421页

作者： JIANG Zhi-chao DOI Yasuaki zhang Shu-you College of Mechanical and Energy Engineering Zhejiang University Hangzhou 310027 China Hangshen Holding Group Co.. Ltd Hangzhou 311234 China Graduate School of Engineering. Hiroshima UniversiO＇ Higashi-hiroshima Hiroshima 739-852 7 Japan

Straight Darrieus wind turbine has attractive characteristics such as the ability to accept wind from random direction and easy installation and maintenance. But its aerodynamic performance is very complicated,especially for the existence of dynamic stall. How to get better aerodynamic performance arouses lots of interests in the design procedure of a straight Darrieus wind turbine. In this paper,mainly the effects of number of blades and tip speed ratio are discussed. Based on the numerical investigation,an assumed asymmetric straight Darrieus wind turbine is proposed to improve the averaged power coefficient. As to the numerical method,the flow around the turbine is simulated by solving the 2D unsteady Navier-Stokes equation combined with continuous equation. The time marching method on a body-fitted coordinate system based on MAC (Marker-and-Cell) method is used. O-type grid is generated for the whole calculation domain. The characteristics of tangential and normal force are discussed related with dynamic stall of the blade. Averaged power coefficient per period of rotating is calculated to evaluate the eligibility of the turbine.

关键词： Small-sized Straight Darrieus wind turbine Multi-bladed Power coefficient

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Wind turbine fault detection based on SCADA data analysis using ANN

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Advances in Manufacturing 2014年第1期2卷 70-78页

作者： Zhen-you zhang Ke-ShengWang Department of Wind Park Management Kongsberg MaritimeAS Trondheim Norway Department of Production and Quality Engineering NorwegianUniversity of Science and Technology Trondheim Norway

Wind energy is one of the fast growing sources of power production currently, and there is a great demand to reduce the cost of operation and maintenance. Most wind farms have installed supervisory control and data acquisition （SCADA） systems for system control and logging data. However, the collected data are not used effectively. This paper proposes a fault detection method for main bearing wind turbine based on existing SCADA data using an artificial neural network （ANN）. The ANN model for the normal behavior is established, and the difference between theoretical and actual values of the parameters is then calculated. Thus the early stage of main bearing fault can be identified to let the operator have sufficient time to make more informed decisions for maintenance.

关键词： Artificial neural network (ANN) Supervisor control and data acquisition (SCADA) Wind turbine Fault detection

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Patent Recommendation Based on Boundary-Spanning Technology Search:An Empirical Study from the Robotics Field

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Journal of Systems Science and Information 2023年第6期11卷 745-760页

作者： Qinghua DONG you zhang Xin zhang School of Economics and Management Beijing University of TechnologyBeijing 100124China School of Arts and Sciences Beijing Institute of Fashion TechnologyBeijing 100029China Institute of Mathematics and Physics Beijing Union UniversityBeijing 100101China

A three-dimensional boundary-spanning technology search model including search depth, scope and height is established, and a quantitative calculation method is proposed to dynamically describe an organisation's technology search behaviour and demand characteristics. Organisations are clustered by types as technical, comprehensive, or professional using k-means based on technology search behaviour. Recommendation strategies for various types of organisations are proposed based on this, and the search and supply libraries of each organisation are built by considering their type and search contents. The semantic similarity between patents in different libraries is calculated using a Word2Vec and TextRank model to achieve patent recommendations. An empirical study of the robotics field shows a recommendation accuracy of 0.751, and the accuracy of the technical, comprehensive, and professional types is 0.8282, 0.5389 and 0.7723, respectively. This study considers an organisation's dynamic search behaviour and makes class-based recommendations, with a low computational complexity and strong interpretability.

关键词： technology search patent recommendation semantic similarity robotics

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Effect of prior martensite on bainite transformation and microstructure of high-carbon nano-bainitic steel

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Journal of Iron and Steel Research International 2022年第4期29卷 647-654页

作者： Xin-pan Yu Hui-bin Wu Yang Gu Rui Yuan you-you zhang Yu-hui Feng Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China

Bainite transformation kinetics,microstructure,and mechanical properties were comparably investigated by X-ray diffraction,scanning electron microscopy,electron backscatter diffraction,transmission electron microscopy observation,and tensile and impact tests for two treatments:with and without quenching before isothermal bainite transformation at 300°*** the incubation time and growth stage of bainite transformation are accelerated by the introduction of prior martensite,especially the *** addition,the bainite microstructure around the prior martensite is refined and shows a similar orientation with the martensite due to the strain field caused by the existence of prior *** finer bainite microstructure and prior martensite improve the strength and hardness of the high-carbon nano-bainitic *** the presence of prior martensite and low misorientation relationship between the martensite and the adjacent bainite microstructure are prejudicial to impact toughness,the nanoscale bainite microstructure can inhibit the crack propagation and then improve the impact toughness of the high-carbon nano-bainitic steel.

关键词： Nano-bainitic steel Prior martensite Transformation kinetics Microstructure Mechanical property

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Slope stability analysis based on big data and convolutional neural network

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Frontiers of Structural and Civil Engineering 2022年第7期16卷 882-895页

作者： Yangpan FU Mansheng LIN you zhang Gongfa CHEN Yongjian LIU School of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou 510006China

The Limit Equilibrium Method(LEM)is commonly used in traditional slope stability analyses,but it is time-consuming and *** to its complexity and nonlinearity involved in the evaluation process,it cannot provide a quick stability estimation when facing a large number of *** this case,the convolutional neural network(CNN)provides a better alternative.A CNN model can process data quickly and complete a large amount of data analysis in a specific situation,while it needs a large number of training *** is difficult to get enough slope data samples in practical *** study proposes a slope database generation method based on the *** were amplified from 40 typical slopes,and a sample database consisting of 20000 slope samples was *** sample database for slopes covered a wide range of slope geometries and soil layers’physical and mechanical *** CNN trained with this sample database was then applied to the stability prediction of 15 real slopes to test the accuracy of the CNN *** results show that the slope stability prediction method based on the CNN does not need complex calculation but only needs to provide the slope coordinate information and physical and mechanical parameters of the soil layers,and it can quickly obtain the safety factor and stability state of the ***,the prediction accuracy of the CNN trained by the sample database for slope stability analysis reaches more than 99%,and the comparisons with the BP neural network show that the CNN has significant superiority in slope stability ***,the CNN can predict the safety factor of real *** particular,the combination of typical actual slopes and generated slope data provides enough training and testing samples for the CNN,which improves the prediction speed and practicability of the CNN-based evaluation method in engineering practice.

关键词： slope stability limit equilibrium method convolutional neural network database for slopes big data

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Study on the Mechanism of Browning of Pomegranate (Punica granatum ***) Peel in Different Storage Conditions

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Agricultural Sciences in China 2008年第1期7卷 65-73页

作者： zhang you-lin zhang Run-guang College of Food Engineering and Nutritional Science Shaanxi Normal University Xi＇an 710062 P.R.China

Peel browning of pomegranate fruit is the key problem during storage. The mechanism of it during storage in relation to the technology of the browning control was studied in this paper. The effects of storage temperature, gas component and pH value on peel browning of sweet pomegranate fruit in Lintong, Shaanxi Province, China, were investigated. Change in tannin content was measured and the relationship between the activities of ascorbic acid oxidase （AAO）, polypenoloxidase （PPO）, peroxidase （POD）, catalase （CAT） and peel browning was analysed. The results showed tannin was the basic substance of pomegranate peel browning. The activities of the browning index of peel were correlated positively with AAO, PPO and POD, correlated negatively with CAT activity. Application of intermittent warming for 24 h at （15 ± 0.5）℃ every 5 days for pomegranate fruit storage under the conditions of pH 4.0, （5.0± 0.5）℃ and 5.0% CO2 ＋ 8.0% O2 ＋ 87.0% N2 gas component could delay browning, with the browning index being 0.15 after 120 days of storage. Enzymatic tannin denaturation was the main cause that led to peel browning of pomegranate fruit during storage. The browning control of pomegranate fruit peel was effective using intermittent warming storage with suitable pH, temperature and gas component.

关键词： pomegranate (Punica granatum L.) storage peel browning

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