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Nano Research 2017年第12期10卷 4115-4138页

作者： Zhiqiang Zhu Xiaodong chen Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University SONanyang Avenue 639798 Singapore

The overall performance of lithium-ion batteries （LIBs） is closely related to the interphase between the electrode materials and electrolytes. During LIB operation, electrolytes may decompose on the surface of electrode materials, forming a solid electrolyte interphase （SEI） layer. Ideally, the SEI layer should ensure reversible lithium-ion intercalation in the electrodes and suppress interfacial interactions. However, the chemical and mechanical stabilities of the SEI layer are not usually able to meet these requirements. Alternatively, tremendous efforts have been devoted to engineering the surface of electrode materials with an artificial interphase, which shows great promise in improving the electrochemical performance. Herein, we present a comprehensive summary of the state-of-the-art knowledge on this topic. The effects of the arrifidal interphase on the electrochemical performance of the electrode materials are discussed in detail. In particular, we highlight the importance of three functions of artificial interphases, including inhibiting electrolyte decomposition, protecting the electrodes from corrosion, and accommodatinz electrode volume chanzes.

关键词： artifidal interphase solid electrolyte interphase electrode materials lithium-ion batteries

Parameters Optimization of Low Carbon Low Alloy Steel Annealing Process

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Acta Metallurgica Sinica(english Letters) 2013年第2期26卷 122-130页

作者： Maoyu ZHAO Qianwang chen School of Chemistry and Materials Science University of Science and Technology of China Department of Mechanical engineering Hefei University

A suitable match of annealing process parameters is critical for obtaining the fine microstructure of material. Low carbon low alloy steel （20CrMnTi） was heated for various durations near Ac temperature to obtain fine pearlite and ferrite grains. Annealing temperature and time were used as independent variables, and material property data were acquired by orthogonal experiment design under intercritical process followed by subcritical annealing process （IPSAP）. The weights of plasticity （hardness, yield strength, section shrinkage and elongation） of annealed material were calculated by analytic hierarchy process, and then the process parameters were optimized by the grey theory system. The results observed by SEM images show that microstructure of optimization annealing material are consisted of smaller lamellar pearlites （ferrite-cementite） and refining ferrites which distribute uniformly. Morphologies on tension fracture surface of optimized annealing material indicate that the numbers of dimple fracture show more finer toughness obviously comparing with other annealing materials. Moreover, the yield strength value of optimization annealing material decreases apparently by tensile test. Thus, the new optimized strategy is accurate and feasible.

关键词： Annealing Process parameters Pearlite Grey system Optimization

传感器感知盲区条件下智能汽车主动制动系统控制研究

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农业机械学报 2020年第2期51卷 363-373页

作者：袁朝春王桐何友国 shen Jie 陈龙翁烁丰江苏大学汽车工程研究院镇江212013 密歇根大学迪尔本校区迪尔本MI 48128

传感器感知盲区是造成智能汽车交通事故的主要原因之一。为了降低传感器感知盲区对智能汽车主动安全性能的影响,对传感器感知盲区条件下的智能汽车主动制动系统控制进行了研究。首先,建立感知盲区数据库,并搭建卷积神经网络对其进行识别... 详细信息

传感器感知盲区是造成智能汽车交通事故的主要原因之一。为了降低传感器感知盲区对智能汽车主动安全性能的影响,对传感器感知盲区条件下的智能汽车主动制动系统控制进行了研究。首先,建立感知盲区数据库,并搭建卷积神经网络对其进行识别;其次,根据其运动特征进行分类,建立感知盲区条件下的安全距离模型;最后,基于上述安全距离模型对感知盲区内的潜在障碍物进行自车速度控制,达到主动避撞的目的。仿真和实车试验表明,提出的传感器感知盲区分类可以较好地表述感知盲区的运动特征,传感器感知盲区条件下的主动避撞安全距离模型对潜在障碍物有较好的预防作用,主动避撞算法提高了智能汽车在传感器感知盲区内的主动安全性能。

关键词：智能汽车传感器感知盲区分类潜在障碍物卷积神经网络安全距离模型

In Vivo Voltammetric Imaging of Metal Nanoparticle-Catalyzed Single-Cell Electron Transfer by Fermi Level-Responsive Graphene

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Research 2024年第1期2023卷 271-280页

作者： Qing Xia Rui Liu Xueqin chen Zixuan chen Jun-Jie Zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023P.R.China shenzhen Research Institute of Nanjing University Shenzhen 518000P.R.China

Metal nanomaterials can facilitate microbial extracellular electron transfer(EET)in the electrochemically active ***,the role of nanomaterials/bacteria interaction in this process is still ***,we reported the single-cell voltammetric imaging of Shewanella oneidensis MR-1 at the single-cell level to elucidate the metal-enhanced EET mechanism in vivo by the Fermi level-responsive graphene *** oxidation currents of~20 fA were observed from single native cells and gold nanoparticle(AuNP)-coated cells in linear sweep voltammetry *** the contrary,the oxidation potential was reduced by up to 100 mV after AuNP *** revealed the mechanism of AuNP-catalyzed direct EET decreasing the oxidation barrier between the outer membrane cytochromes and the *** method offered a promising strategy to understand the nanomaterials/bacteria interaction and guide the rational construction of EET-related microbial fuel cells.

关键词： Fermi voltammetry Electron

An Improved Algorithm for Constructing Moving Quadrics from Moving Planes

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Journal of Systems Science & Complexity 2017年第6期30卷 1483-1506页

作者： LAI Yisheng chen Falai Department of Mathematics Zhejiang Gongshang University Department of Mathematics University of Science and Technology of China

This paper proposes an improved algorithm to construct moving quadrics from moving planes that follow a tensor product surface with no base points, assuming that there are no moving planes of low degree following the surface. These moving quadrics provide an efficient method to implicitize the tensor product surface which outperforms a previous approach by the present authors.

关键词： Implicitization moving plane moving quadric rational surface

SUPPRESSION OF BenDING WAVES IN A PERIODIC BEAM WITH TIMOshenKO BEAM THEORY

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Acta Mechanica Solida Sinica 2013年第2期26卷 177-188页

作者： Tao chen Ligang Wang College of Science Harbin Engineering University

Active control of bending waves in a periodic beam by the Timoshenko beam theory is concerned. A discussion about the possible wave solutions for periodic beams and their control by forces is presented. Wave propagation in a periodic beam is studied. The transfer matrix between two consecutive unit cells is obtained based on the continuity conditions. Wave amplitudes are derived by employing the Bloch-Floquet theorem and the transfer matrix. The influences of the propagating constant on the wave amplitudes are considered. It is shown that vibrations are still needed to be suppressed in the pass-band regions. Wave-suppression strategy described in this paper is employed to eliminate the propagating disturbance of an infinite periodic beam. A minimum wave-suppression strategy is compared with the classical wave-suppression strategy.

关键词： vibration control wave beam periodic structure

SOME SEMI-BenT FUNCTIONS WITH POLYNOMIAL TRACE FORM

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Journal of Systems Science & Complexity 2014年第4期27卷 777-784页

作者： chen Hao CAO Xiwang Department of Math Nanjing University of Aeronautics and Aeronautics

This paper is devoted to the study of semi-bent functions with several parameters flexible on the finite field *** functions defined on F2n of the form f（r）ab（x） =Trn1（axr（2m-1））＋Tr41（bx（2n-1）/5） and the form g（rs）abcd（x）=Trn1（axr（2m-1））＋Tr41（bx（2n-1）/5）＋Trn1（cx（2m-1）1/2＋1）＋Trn1（dx（2m-1）s＋1） where n = 2m,m = 2（mod 4）,a,c ∈ F2n,and b ∈ F（16）,d ∈ F2,are investigated in constructing new classes of semi-bent *** characteristic sums such as Kloosterman sums and Weil sums are employed to determine whether the above functions are semi-bent or not.

关键词： Boolean function Dickson polynomial exponential sum Kloosterman sum semi-bentfunction Walsh-Hadamard transformation Weil sum.

Simulation of the Fate of Faecal Bacteria in Estuarine and Coastal Waters Based on A Fractionated Sediment Transport Model

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China Ocean engineering 2017年第4期31卷 389-395页

作者： YANG chen LIU Ying College of Petroleum engineering China University of Petroleum Beijing 102249 China China Institute of Water Resources and Hydropower Research Beijing 100038 China Research Center on Flood & Drought Disaster Reduction of the Ministry of Water Resources Beijing 100038 China

A two-dimensional depth-integrated numerical model is refined in this paper to simulate the hydrodynamics, graded sediment transport process and the fate of faecal bacteria in estuarine and coastal waters. The sediment mixture is divided into several fractions according to the grain size. A bed evolution model is adopted to simulate the processes of the bed elevation change and sediment grain size sorting. The faecal bacteria transport equation includes enhanced source and sink terms to represent bacterial kinetic transformation and disappearance or reappearance due to sediment deposition or re-suspension. A novel partition ratio and dynamic decay rates of faecal bacteria are adopted in the numerical model. The model has been applied to the turbid water environment in the Bristol Channel and Severn estuary, UK. The predictions by the present model are compared with field data and those by non-fractionated model.

关键词： bed evolution decay rate esmarine and coastal water faecal bacteria fractionated model sediment Wansport

Cost Allocation for Inventory Problem with Transportation Discount under Carbon Tax Policy

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Journal of Systems Science and Systems engineering 2024年第6期33卷 759-778页

作者： Guojing chen Dongshuang Hou School of Mathematics and Statistics Northwestern Polytechnical UniversityXi’an710072China Research&Development Institute of Northwestern Polytechnical University in shenzhen Sanhang Science&Technology BuildingShenzhen518063China

In this paper,we deal with the problem of cost allocation among multiple retailers in an inventory system with transportation quantity discount under the widely-used carbon tax *** first develop an inventory model with transportation discount under the carbon tax policy,and determine the optimal order quantity per order such that the total cost is minimized in the case of individual and joint *** show that the total cost for the group of retailers can be reduced by placing joint orders while the total carbon emissions may ***,we provide a sufficient condition which indicates that when the costs and carbon emissions associated with each order initiated are relatively high,enterprises can achieve dual objectives(both carbon emission reduction and cost reduction)through joint *** allocate the total cost among the retailers,we introduce an inventory game and show that this game is *** on this,we propose a cost allocation rule,which belongs to the core of the game.

关键词： Supply chain management inventory systems carbon tax transportation discount cooperative games

Occurring Mechanism and Restraining Method Research of Numerical Noise Signal in Penetration Simulation

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Chinese Journal of Mechanical engineering 2016年第5期29卷 1037-1043页

作者： WANG chen WANG Yabin National Key Laboratory on Electromechanical Dynamic Control Beijing Institute of Technology Beijing 100081 China

In hard target penetration simulation, the existing researches of the convergence of results are mainly concentrating in the corresponding relationship between penetration depth and mesh scales. However, the influence of the mesh difference on the penetration resistance and acceleration signals are seldom refer to. This paper presents the occurring mechanism and restraining method of numerical noise signal in penetration simulation. First, the concept of the noise signal izs proposed. By taking a 3D penetration simulation as example, the influence of the noise signal on the penetration resistance in different mesh scales and impact velocity is studied. To ensure the convergence of the computational results, the grid scale of the target is encrypted to 1：1：8. In addition, modem spectrum analysis method is introduced to further analyze the penetration resistance signal. The research results presented is useful to improve the computational accuracy of high speed projectile penetration simulation, and provide important reference for carrying out structural design and optimization of fuze system.

关键词： hard target penetration numerical simulation signal of numerical noise spectral analysis