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Estimating the thickness of diffusive solid electrolyte interface

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Science China(Physics,Mechanics & Astronomy) 2017年第6期60卷 61-68页

作者： XiaoHe Wang WenHao Shen XianFu Huang JinLiang Zang yapu zhao State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

electrolyte. The properties of lithium-ion (Li-ion) battery, such as cycle life, irreversible capacity loss, self-discharge rate, electrode corrosion and safety are usually ascribed to the quality of the SEI, which are highly dependent on the thickness. Thus, understanding the formation mechanism and the SEI thickness is of prime interest. First, we apply dimensional analysis to obtain an explicit relation between the thickness and the number density in this study. Then the SEI thickness in the initial charge-discharge cycle is analyzed and estimated for the first time using the Cahn-Hilliard phase-field model. In addition, the SEI thickness by molecular dynamics simulation validates the theoretical results. It has been shown that the established model and the simulation in this paper estimate the SEI thickness concisely within order-of-magnitude of nanometers. Our results may help in evaluating the performance of SEI and assist the future design of Li-ion battery.

关键词： lithium-ion battery solid electrolyte interface diffusion model thickness estimation

Preface to the Special Issue on Physical Mechanics

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Science China(Physics,Mechanics & Astronomy) 2012年第6期55卷 915-917页

作者： zhao yapu Professor Guest Editor Institute of Mechanics,Chinese Academy of Sciences Institute of Mechanics Chinese Academy of Sciences

The 23rd International Congress of Theoretical and Applied Mechanics （ICTAM2012） will be held in Beijing, China, from August 19 to 24, 2012. The Congress （ICTAM）, as the most authoritative and comprehensive conference in mechanics in the world and regarded as the ＂Olympic games＂ of mechanicians, is organized by the International Union of Theoretical and Ap- plied Mechanics （IUTAM） every four years. It brings together scientists and students from all over the world to exchange state-of-the-art achievements in the field of mechanics to promote the research, application and education of mechanics. The ICTAM2012, hosted by the Chinese Society of Theoretical and Applied Mechanics （CSTAM）, is expected to promote re- search and applications of mechanics in China as well as throughout the world. CSTAM has decided to launch a series of activities in 2012 named ＂Mechanics Year 2012＂, with the theme of ＂Mechanics ~ Achievement. Future＂.

关键词：物理力学应用力学序言力学学会 IUTAM 交流机制教育领域中国

Moving contact line problem: Advances and perspectives

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Theoretical & Applied Mechanics Letters 2014年第3期4卷 1-17,I0004页

作者： yapu zhao State Key Laboratory of Nonlinear Mechanics (LNM) Institute of MechanicsChinese Academy of Sciences

The solid-liquid interface, which is ubiquitous in nature and our daily life, plays fundamental roles in a variety of physical-chemical-biological- mechanical phenomena, for example in lubrication, crystal growth, and many biological reactions that govern the building of human body and the functioning of brain. A surge of interests in the moving contact line （MCL） problem, which is still going on today, can be traced back to 1970s primarily because of the exis- tence of the ＂Huh-Scriven paradox＂. This paper, mainly from a solid mechanics perspective, describes very briefly the multidisciplinary nature of the MCL problem, then summarizes some major advances in this exciting research area, and some future directions are presented.

关键词： solid-liquid interface moving contact line Huh-Scriven paradox molecu-lar kinetic theory electrowetting electro-elasto-capillarity slip boundary conditions cellspreading Zhurkov-Bell model emergent phenomenon

Preliminary Study on Adapting ProtoPNet to Few-Shot Learning Using MAML

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国际计算机前沿大会会议论文集 2022年第1期 139-151页

作者： yapu zhao Yue Wang Xiangyang Zhai School of Information Central University of Finance and EconomicsBeijingChina

ProtoPNet proposed by Chen et *** able to provide interpretability that conforms to human intuition,but it requiresmany iterations of training to learn class-specific prototypes and does not support few-shot *** propose the few-shot learning version of ProtoPNet by using MAML,enabling it to converge quickly on different classification *** test our model on the Omniglot and MiniImagenet datasets and evaluate their prototype *** experiments showthatMAML-ProtoPNet is a transparent model that can achieve or even exceed the baseline accuracy,and its prototype can learn class-specific features,which are consistent with our human recognition.

关键词： Prototypical features Interpretability Few-shot learning MAML

Effects of adhesion energy and residual stress on the stiction shape

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Effects of adhesion energy and residual stress on the sticti...

Analyzing Interpretability Semantically via CNN Visualization

中国力学大会——2013

作者： Zhang Yin zhao yapu State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of Sciences

The competition between the adhesive force and the beam restoring force determines the stiction shape of a microbeam. The presence of residual stress changes the beam stiffness and thus leads to the change of the beam restoring *** study presents a model of incorporating the residual stress effect for the beam *** previous models of arc-shape and Sshape correspond to the zero residual case,which also prescribes

关键词：

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国际计算机前沿大会会议论文集 2021年第2期 88-102页

作者： Chunqi Qi Yuechen zhao Yue Wang yapu zhao Qian Hong Xiuli Wang Weiyu Guo School of Information Central University of Finance and EconomicsBeijingChina

Deep convolutional neural networks are widely used in image recognition,but the black box property is always *** this paper,a method is proposed using visual annotation to interpret the internal structure of CNN from the semantic ***,filters are screened in the high layers of the *** a certain category,the important filters are selected by their activation values,frequencies and classification ***,deconvolution is used to visualize the filters,and semantic interpretations of the filters are labelled by referring to the visualized activation region in the original ***,the CNN model is interpreted and analyzed through these ***,the visualization results of some important filters are shown,and the semantic accuracy of filters are verified with reference to the expert feature image *** addition,the results verify the semantic consistency of the same important filters under similar categories,which indicates the stability of semantic annotation of these filters.

关键词： CNN Deconvolution visualization Semantic annotations Interpretability

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若干弹性力学问题解的唯一性定理

中国科学：物理学、力学、天文学 2020年第8期50卷 52-85页

作者：高梦霓赵亚溥中国科学院力学研究所非线性力学国家重点实验室北京100190 中国科学院大学工程科学学院北京100049

弹性力学问题解的适定性,包括存在性、唯一性以及稳定性(对边界条件的连续依赖性).其中解的唯一性定理是求解定解问题的一个有力工具,为各种求解方法提供理论依据,解是否满足唯一性是弹性理论的一个基本问题.然而,在物理上三维弹性问题... 详细信息

弹性力学问题解的适定性,包括存在性、唯一性以及稳定性(对边界条件的连续依赖性).其中解的唯一性定理是求解定解问题的一个有力工具,为各种求解方法提供理论依据,解是否满足唯一性是弹性理论的一个基本问题.然而,在物理上三维弹性问题存在非唯一解的例子广泛存在,其相应的数学模型并不能要求解的唯一性定理无条件成立.因此解的唯一性需在一定的条件下成立,如弹性张量、应变能函数和变形范围的限制条件.本文回顾了解的唯一性定理在弹性理论中的背景和发展历史,重点介绍了线性弹性理论、有限变形非线性弹性理论和具有初始应力场的弹性理论中边值问题的解的唯一性定理,给出了其中重要定理的证明方法.在此基础上,结合研究进展提出了弹性力学问题解的唯一性定理的待解决问题.

关键词：弹性理论边值问题唯一性定理本构关系应变能函数凸性

A NANOMECHANICAL DEVICE BASED ON LIGHT-DRIVEN PROTON PUMPS

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A NANOMECHANICAL DEVICE BASED ON LIGHT-DRIVEN PROTON PUMPS

The dispersion characteristics of the waves propagating in a spinning single-walled carbon nanotube

中国力学学会学术大会'2005

作者： Ren Quan zhao yapu (Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China)

Bacteriohodopsin (bR), imbedded in purple membrane (PM) isolated from Halobactrerium salimarum, functions as a light-driven proton pump is capable of translocation of protons across the membrane in cell, thereby generates a substantial electrochemical gradient in presence of visible light. With labeled by biotin, the high oriented PM film can be self-assembled on the microcantilever surface to construct a hybrid device. Illuminated by visible light, the light-driven proton pump transports the proton from the solution toward the interface between microcantilever surface and PM, and the resulting gradient of proton induces the change of

关键词： bacteriorhodopsin microcantilever deflection surface stress proton transport

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Science China(Physics,Mechanics & Astronomy) 2011年第10期Mechanics & Astronomy) .卷 1854-1865页

作者： CHAN K. T.1& zhao yapu2*1Mechanical Engineering Department, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China 2State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China 1. Mechanical Engineering Department The Hong Kong Polytechnic University Hung Hom Hong Kong China2. State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

As the nano-motor becomes a mechanical reality, its prototype can be envisaged as nano-sized rotating machinery at a situation,albeit for different purposes, like that in the first half of the 20th century during which rotor dynamics has contributed toboosting machine power capacity. Accordingly, we take the benefit of hindsight to develop a classical framework of vibrationanalysis. Essentially, the equations of motion are formulated to cope with both the special carbon-nanotube properties and thefirst author’s previously developed spinning beam formalism, establishing a model satisfactorily verified by some availablemolecular dynamics (MD) data and classical spinning beam results extracted from the literature. The model is inexpensivebased on continuum mechanics as an alternative to the less-flexible MD method for simulating wave motion of the spinningsingle-walled carbon nanotube, yielding several interesting phenomena, including the fall-off and splitting of the wave charac-teristic curves and the unexpected gyroscopic phase property. Potential applications are proposed.

关键词： spinning single-walled carbon nanotube gyroscopic phase property nonlocal elasticity nonlocal Timoshenko beamtheory