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Research status and prospects of the fractal analysis of metal material surfaces and interfaces

International Journal of Minerals,Metallurgy and materials 2025年第1期32卷 20-38页

作者： Qinjin Dai Xuefeng Liu xin ma.shaojie tian Qinghe Cui Beijing Advanced Innovation Center for materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

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Multi-receptive field interaction network for shape from polarization

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Science China(Information Sciences) 2025年第1期 394-395页

作者： Yini PENG Rui LIU Zhiyuan ZHANG Zhongyuan WANG Jiayi ma xin tian Electronic Information School Wuhan University Computer Science School Wuhan University Wuhan Institute of Quantum Technology

Shape from polarization (SfP) method can use the polarization information in reflected light to estimate the surface normal of the target,which can further reconstruct the shape of the *** a simple image capture process,it can use low-cost equipment to meet a high precision imaging requirement,which can be used in remote scenes and other applications.

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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi tian Tang Yunfan Zhang Zhiyuan ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 ma cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

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Investigation into the energy consumption of a data center with a thermosyphon heat exchanger

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Chinese Science Bulletin 2011年第20期56卷 2185-2190页

作者： ZHOU Feng tian xin ma GuoYuan College of Environmental and Energy Engineering Beijing University of TechnologyBeijing 100124China

A data center test model was used to analyze the energy dissipation characteristics and energy consumption of a data *** results indicate that adequate heat dissipation from a data center cannot be achieved only from heat dissipation through the building envelope during Beijing winter *** is because heat dissipation through the building envelope covers about 19.5% of the total data center heat *** average energy consumption for an air conditioner is 4 to 5 kW over a 24-h *** temperature difference between the indoor and outdoor air for the data center with a thermosyphon heat exchanger is less than 20°*** energy consumption of the thermosyphon heat exchanger is only 41% of that of an air *** annual energy consumption can be reduced by 35.4% with a thermosyphon *** addition,the effect of the outdoor temperature on the en-ergy consumption of an air conditioner is greater than the indoor room *** energy consumption of an air conditioner system increases by 5%to 6%for every 1°C rise in the outdoor temperature.

关键词：数据中心能源消耗热虹吸管换热空调系统围护结构室外空气能量耗散

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Sparse Tensor Prior for Hyperspectral,Multispectral,and Panchromatic Image Fusion

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IEEE/CAA Journal of Automatica Sinica 2023年第1期10卷 284-286页

作者： xin tian Wei Zhang Dian Yu Jiayi ma the Electronic Information School Wuhan UniversityWuhan 430072China

Dear Editor, This letter is concerned with a new hyperspectral fusion paradigm by simultaneously fusing hyperspectral, multispectral, and panchromatic images. Seeking an efficient prior about the target hyperspectral image(HSI), is vital for constructing an accurate fusion model in this problem. To this end, this work suggests a novel sparse tensor prior using patch-based sparse tensor dictionary learning.

关键词： spectral patch concerned

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Evolutionary Computation in Social Propagation over Complex Networks: A Survey

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International Journal of Automation and computing 2021年第4期18卷 503-520页

作者： tian-Fang Zhao Wei-Neng Chen xin-xin ma Xiao-Kun Wu School of Computer Science&Engineering South China University of TechnologyGuangzhou 510006China School of Journalism and Communication South China University of TechnologyGuangzhou 510006China

Social propagation denotes the spread phenomena directly correlated to the human world and society, which includes but is not limited to the diffusion of human epidemics, human-made malicious viruses, fake news, social innovation, viral marketing, etc. Simulation and optimization are two major themes in social propagation, where network-based simulation helps to analyze and understand the social contagion, and problem-oriented optimization is devoted to contain or improve the infection results. Though there have been many models and optimization techniques, the matter of concern is that the increasing complexity and scales of propagation processes continuously refresh the former conclusions. Recently, evolutionary computation(EC) shows its potential in alleviating the concerns by introducing an evolving and developing perspective. With this insight, this paper intends to develop a comprehensive view of how EC takes effect in social propagation. Taxonomy is provided for classifying the propagation problems, and the applications of EC in solving these problems are reviewed. Furthermore, some open issues of social propagation and the potential applications of EC are *** paper contributes to recognizing the problems in application-oriented EC design and paves the way for the development of evolving propagation dynamics.

关键词： Evolutionary computation complex network propagation dynamics social diffusion evolution model optimization algorithm

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Adaptive Proportional-Derivative Sliding Mode Control Law With Improved Transient Performance for Underactuated Overhead Crane Systems

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IEEE/CAA Journal of Automatica Sinica 2018年第3期5卷 683-690页

作者： Menghua Zhang xin ma Rui Song Xuewen Rong Guohui tian xincheng tian Yibin Li School of Control Science and Engineering Shandong University

In this paper, an adaptive proportional-derivative sliding mode control(APD-SMC) law, is proposed for 2D underactuated overhead crane systems. The proposed controller has the advantages of simple structure, easy to implement of PD control, strong robustness of SMC with respect to external disturbances and uncertain system parameters, and adaptation for unknown system dynamics associated with the feedforward parts. In the proposed APD-SMC law, the PD control part is used to stabilize the controlled system, the SMC part is used to compensate the external disturbances and system uncertainties,and the adaptive control part is utilized to estimate the unknown system parameters. The coupling behavior between the trolley movement and the payload swing is enhanced and, therefore, the transient performance of the proposed controller is *** Lyapunov techniques and the La Salle's invariance theorem are employed in to support the theoretical derivations. Experimental results are provided to validate the superior performance of the proposed control law.

关键词： Adaptability adaptive proportional-derivative sliding mode control(APD-SMC) coupling behavior La Salle’s invariance theorem Lyapunov techniques robustness underactuated overhead crane

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A new protoberberine alkaloid from Corydalis yanhusuo ***

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Chinese Chemical Letters 2009年第8期20卷 955-957页

作者： tian tian Hu Xue Zhang Shi Zhong ma xin Sheng Yao School of Traditional Chinese materia Medica Shenyang Pharmaceutical University Shenyang 110016 China

A new protoberberine alkaloid, named 5,6-dihydro- 10-hydroxy-2,3,9-trimethoxy- 13-methyldibenzo[α,g]quinoliziniurn （1） was isolated from the 60% ethanol extract of the tubers of Corydalis yanhusuo W. T. Wang, together with a new natural product, 13methylpalmatrubine （2）. Their structures were established by spectroscopic methods. 2009 xin Sheng Yao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All fights reserved.

关键词： Corydalis yanhusuo W. T. Wang Protoberberine alkaloid 13-Methylpalmatrubine

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More Than Lightening:A Self-Supervised Low-Light Image Enhancement Method Capable for Multiple Degradations

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 622-637页

作者： Han Xu Jiayi ma Yixuan Yuan Hao Zhang xin tian Xiaojie Guo the Electronic Information School Wuhan UniversityWuhan 430072China IEEE the Department of Electronic Engineering Chinese University of Hong KongHong Kong 999077China the College of Intelligence and Computing Tianjin UniversityTianjin 300350China

Low-light images suffer from low quality due to poor lighting conditions,noise pollution,and improper settings of *** enhance low-light images,most existing methods rely on normal-light images for guidance but the collection of suitable normal-light images is *** contrast,a self-supervised method breaks free from the reliance on normal-light data,resulting in more convenience and better *** self-supervised methods primarily focus on illumination adjustment and design pixel-based adjustment methods,resulting in remnants of other degradations,uneven brightness and *** response,this paper proposes a self-supervised enhancement method,termed as *** can handle multiple degradations including illumination attenuation,noise pollution,and color shift,all in a self-supervised *** attenuation is estimated based on physical principles and local neighborhood *** removal and correction of noise and color shift removal are solely realized with noisy images and images with color ***,the comprehensive and fully self-supervised approach can achieve better adaptability and *** is applicable to various low light conditions,and can reproduce the original color of scenes in natural *** experiments conducted on four public datasets demonstrate the superiority of SLIE to thirteen state-of-the-art *** code is available at https://***/hanna-xu/SLIE.

关键词： Color correction low-light image enhancement self-supervised learning.

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Pulse cleaning flow models and numerical computation of candle ceramic filters

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Journal of Environmental Sciences 2002年第2期14卷 210-215页

作者： tian, Gui-shan ma, Zhen-ji Zhang, xin-yi Xu, Ting-xiang Dept. of Resource and Envrn. Eng. Zibo University Zibo 255091 China

Analytical and numerical computed models are developed for reverse pulse cleaning system of candle ceramic filters. A standard turbulent model is demonstrated suitably to the designing computation of reverse pulse cleaning system from the experimental and one dimensional computational result. The computed results can be used to guide the designing of reverse pulse cleaning system, which is optimum Venturi geometry. From the computed results, the general conclusions and the designing methods are obtained.

关键词： candle ceramic filters reverse pulse cleaning face velocity numerical computed models pressure difference

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