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Eigen elastic mechanics and its variation principle

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中国有色金属学会会刊：英文版 2001年第2期11卷 281-282页

作者： guo shao-hua 郭少华 College of Resources Environment and Civil Engineering Central South University

The fundamental equations and the corresponding boundary condition of elastic mechanics under mechanical representation are given by using the conception of eigen space and elastic variation principle. It is proved theoretically that the solution of anisotropic elastic mechanics consists of modal ones, which are obtained respectively from the modal equation of the different subspaces. A simple application is also given.

关键词： anisotropy eigen elastic mechanics variation principle modal equation

A Fast Solution Method to Economic Dispatch Type Problem

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1227-1232页

作者： Chenjia feng Chengcheng shao Xifan Wang Life School of Electrical Engineering Xi’an Jiaotong UniversityXi’an 710049China

Economic dispatch(ED)aims to minimize the generation cost subject to power balance *** is extensively used in power system operation and *** problem as well as other problems with the same formulation are named as ED-type problems in this letter and a fast solution method is *** proposed method is achieved by solving a series of relaxed *** a closed-form solution for the relaxed ED-type problems,it is demonstrated that the proposed method consumes far less computing time and memory space than the off-the-shelf solvers and other quadratic programming(QP)***,the effectiveness and computational efficiency of the proposed method are verified by the case studies,which shows the great potential in power system planning and operation.

关键词： Fast solution economic dispatch closed-form solution quadratic programming

THREE DIMENSION QUASI-WILSON ELEMENT FOR FLAT HEXAHEDRON MESHES

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Journal of Computational Mathematics 2004年第2期22卷 178-187页

作者： shao-chunChen Dong-yangShi guo-biaoRen DepartmentofMathematics ZhengzhouUniversityZhengzhou450002China

The well known Wilson's brick is only convergent for regular cuboid meshes. In this paper a quasi-Wilson element of three dimension is presented which is convergent for any hexahedron meshes. Meanwhile the element is ... 详细信息

关键词： Anisotropic convergence Nonconforming element Three dimension Quasi-Wilson element

First-Principles Study on Electronic and Optical Properties of Graphene-Like Boron Phosphide Sheets

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Chinese Journal of Chemical Physics 2015年第5期28卷 -页

作者： shao-feng Wang Xiao-jun Wu CAS Key Laboratory of Materials for Energy Conversion and Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China CAS Key Laboratory of Materials for Energy Conversion and Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 ChinaSynergetic Innovation Center of Quantum Information & Quantum Physics University of Science and Technology of China Hefei 230026 ChinaSchool of Chemistry and Materials Science and Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 China

Two-dimensional semiconducting materials with moderate band gap and high carrier mobility have a wide range of applications for electronics and optoelectronics in nanoscale. On the basis of first-principles calculations, we perform a comprehensive study on the electronics and optical properties of graphene-like boron phosphide (BP) sheets. The global structure search and first-principles based molecular dynamic simulation indicate that two-dimensional BP sheet has a graphene-like global minimum structure with high stability. BPmonolayer is semiconductor with a direct band gap of 1.37 eV, which reduces with the number of layers. Moreover, the band gaps of BP sheets are insensitive to the applied uniaxial strain. The calculated mobility of electrons in BPmonolayer is as high as 106 cm2/(V·s). Lastly, the MoS2/BP van der Waals heterobilayers are investigated for photovoltaic applications, and their power conversion efficiencies are estimated to be in the range of 17.7%–19.7%. This study implies the potential applications of graphene-like BP sheets for electronic and optoelectronic devices in nanoscale.

关键词： Density functional theory BP sheet Electronic structure Optical properties

Robust tuning method for modified smith predictor

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Journal of Systems Engineering and Electronics 2007年第1期18卷 89-94页

作者： Zhang Guanghui Qian feng shao Huihe Inst. of Automation East China Univ. of Science and Technology Shanghai 200237 P. R. China Inst. of Automation Shanghai Jiaotong Univ. Shanghai 200030 P. R. China

A robust tuning method for ο^Astroem＇s two-degree of Freedom Modified Smith Predictor （MSP） is proposed, and it can achieve the fast setpoint and load disturbance responses independently. The tuning rules may meet the requirements within a certain delay margin according to the robustness theory. The simulation results illustrate that the tuning method is efficient compared with other controllers. Finally, the MSP controller is applied to the 15L batch fermentation system for controlling the temperature in bioreactor, and the experiment results further verify that the robust tuning rules may achieve good performance.

关键词： Tuning Smith Predictor Robusmess Integrating processes Temperature control

Multi-view video color correction using dynamic programming

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Journal of Systems Engineering and Electronics 2008年第6期19卷 1115-1120页

作者： shao feng Jiang Gangyi Yu Mei Faculty of Information Science and Engineering Ningbo Univ. Ningbo 315211 P. R. China National Key Lab of Software New Technology Nanjing Univ. Nanjing 210093 P. R. China

Color inconsistency between views is an important problem to be solved in multi-view video systems. A multi-view video color correction method using dynamic programming is proposed. Three-dimensional histograms are constructed with sequential conditional probability in HSI color space. Then, dynamic programming is used to seek the best color mapping relation with the minimum cost path between target image histogram and source image histogram. Finally, video tracking technique is performed to correct multi-view video. Experimental results show that the proposed method can obtain better subjective and objective performance in color correction.

关键词： multi-view video color correction dynamic programming video tracking

Synthesis of anew siloxane-containing diamine and related polyimide

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Chinese Chemical Letters 2007年第6期18卷 762-763页

作者： Yu shao Yan feng Li Xiao Long Wang Jin Shan guo Xin Zhao State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

A novel siloxane-containing diamine, bis[4-(p-aminophenoxy)phenoxy]dimethylsilane (APPMS), was successfully synthesized in three steps using hydroquinone as starting material, which was reacted with 4,4′-oxydiphthalic anhydride (ODPA) via a conventional two-step thermal or chemical imidization method to produce a new siloxane-containing polyimide. The resulting polyimide exhibited excellent solubility, and film-forming capability.

关键词： Polyimide Siloxane-containing diamine Solubility

Hotspots and trends of risk factors in gastric cancer: A visualization and bibliometric analysis

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2200-2218页

作者： Meng Li Ning Gao shao-Li Wang Yu-feng guo Zhen Liu Department of Gastroenterology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Department of Acupuncture and Moxibustion Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China

BACKGROUND The lack of specific symptoms of gastric cancer(GC)causes great challenges in its early *** it is essential to identify the risk factors for early diagnosis and treatment of GC and to improve the survival *** To assist physicians in identifying changes in the output of publications and research hotspots related to risk factors for GC,constructing a list of key risk factors,and providing a reference for early identification of patients at high risk for *** Research articles on risk factors for GC were searched in the Web of Science core collection,and relevant information was extracted after *** literature was analyzed using Microsoft Excel 2019,CiteSpace V,and VOSviewer *** A total of 2514 papers from 72 countries and 2507 research institutions were ***(n=1061),National Cancer Center(n=138),and Shoichiro Tsugane(n=36)were the most productive country,institution,or author,*** research hotspots in the study of risk factors for GC are summarized in four areas,namely:Helicobacter pylori(***)infection,single nucleotide polymorphism,bio-diagnostic markers,and GC risk prediction *** In this study,we found that *** infection is the most significant risk factor for GC;single-nucleotide polymorphism(SNP)is the most dominant genetic factor for GC;bio-diagnostic markers are the most promising diagnostic modality for *** risk prediction models are the latest current research *** conclude that the most important risk factors for the development of GC are *** infection,SNP,smoking,diet,and alcohol.

关键词： Gastric cancer Risk factor Bibliometric Research hotspots VOSviewer

An eikonal equation based path planning method using polygon decomposition and curve evolution

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Defence Technology（防务技术） 2020年第5期16卷 1001-1018页

作者： Zheng Sun Zhu-feng shao Hui Li School of Mechanical and Electrical Engineering Zaozhuang UniversityZaozhuang277160China Department of Mechanical Engineering School of Mechanical EngineeringTsinghua UniversityBeijing100084China

Path planning is a key technique of autonomous navigation for robots,and the velocity field is an important *** velocity field in a complex workspace is still *** this paper,an inner normal guided segmentation algorithm in a complex polygon is proposed to decompose the complex workspace in this *** artificial potential field model based on probability theory is then used to calculate the potential field of the decomposed workspace,and the velocity field is obtained by utilizing the potential field of this *** optimization is implemented by curve evolution,during which the internal force generated in the smoothing process of the initial path by a mean filter and the external force is obtained from the gradient of the workspace potential *** parameter selection principle is deduced by analyzing the influence of several parameters on the path length and *** results show that the designed polygon decomposition algorithm can effectively segment complex workspace and that the path optimization algorithm can shorten and smoothen paths.

关键词： Level set Path planning Artificial potential field Polygon decomposition Path optimization Curve evolution