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Simplified Modeling and mathematical analysis in Cardiac Electric Field Propagation for Human and Animals

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Journal of Beijing Institute of Technology 2020年第2期29卷 167-176页

作者： Ping Lang Lei Han School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

The different characteristics of cardiac electric field(CEF)radiation in humans and other animals are presented in this *** modeling and mathematical analysis are developed to comprehensively unveil the properties of CEF,based on typical heartbeat *** numerical simulation results demonstrate that the frequency bandwidths and the cycle durations of CEF are different for healthy humans versus humans on the verge of death and for humans versus other *** results indicate that the present study may extensively contribute towards recognizing human beings or other animal targets quickly and accurately with CEF in dangerous situations or in other applications.

关键词： mathematical analysis distinguishing standards cardiac electric field targets identification

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Teaching Reform and Practice of “mathematical analysis” under the New Engineering Education Paradigm

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Journal of Contemporary Educational Research 2024年第8期8卷 38-45页

作者： Xiang Wu School of Mathematics and Physics Anqing Normal UniversityAnqing 246133Anhui ProvinceChina

With the advent and promotion of the new engineering education paradigm,university mathematics courses face new challenges and *** a fundamental course for engineering majors,the reform of“mathematical analysis”is particularly *** paper explores the necessity,specific practices,and outcomes of teaching reform in“mathematical analysis”within the context of the new engineering *** reforming teaching content,methods,and assessment approaches,this study aims to enhance students’mathematical literacy and comprehensive abilities to meet the demands of the new engineering education development.

关键词： New engineering education mathematical analysis Teaching reform Teaching practice

The Research-oriented Teaching Of mathematical analysis

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The Research-oriented Teaching Of Mathematical Analysis

Numerical analysis on the influence of vortex motion in a reverse Stairmand cyclone separator by using LES model

第5届教育教学改革与管理工程学术年会

作者： Wenjun LIU Department of Mathematics Jiujiang University

The research-oriented teaching mode is an important measure for raise teaching quality and level. In this article, based on teaching practice, the author analyzes the present situation of mathematical analysis teaching in China’s colleges and universities, expounds some practice experience in the research-oriented teaching of mathematical analysis, and summarizes the harvest and shortage.

关键词： Research-oriented Teaching Mode mathematical analysis Practice

来源： cnki会议评论

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Petroleum Science 2022年第2期19卷 848-860页

作者： Zhu-Wei Gao Zhong-Xin Liu Yao-Dong Wei Cheng-Xin Li Shi-Hao Wang Xin-Yu Qi Wei Huang School of Chemical Engineering and Technology Hainan UniversityHaikou570228PR China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249PR China Beijing Key Laboratory of Process Fluid Filtration and Separation Beijing102249PR China State Key Laboratory of Marine Resource Utilization in South China Sea College of Materials and Chemical EngineeringHainan UniversityHaikou570228PR China

This study aims to analyze the influence of vortex motion in a reverse Stairmand cyclone separator by using LES *** mathematical analysis indicated that the energy dissipation and the flow characteristics of incompressible fluid are directly related to on the vortex *** results of the Q criterion-based iso-vortex surface could well reflect the tendency of the vortex structure,in which the iso-vortex surface exhibited a distorted distribution rather than around the center *** the turning point of velocity vector,vortices were formed and developed,and the point was the center of the local vortex *** addition,the vortex formed an irregular annular region around the wall at the bottom of vortex *** vortex structure near the dust hopper presented a strong ***,there were two rotating flow in the opposite direction within the dust *** phenomena would affect the separation performance,which was significance to cyclone separator.

关键词： Numerical simulation Cyclone separator mathematical analysis Vortex motion Local analysis

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Mass transport analysis of a showerhead MOCVD reactor

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Journal of Semiconductors 2011年第3期32卷 37-41页

作者：李晖 School of Energy and Power Engineering Jiangsu University School of Mechanical Engineering Jimei University

The mass transport process in a showerhead MOCVD reactor is mathematically *** mathematical analysis shows that the vertical component velocity of a point over the substrate is only dependent on vertical distance and is independent of radial *** boundary layer thickness in stagnation flow is independent of the radial position *** to the above features,the flow field suitable for film growth can be *** ceiling height of the reactor has important effects on residence time and the mass transport *** showerhead MOCVD reactor has a short residence time and diffusion plays an important role in axial transport,while both diffusion and convection are important in radial transport.

关键词： showerhead MOCVD reactor mass transport mathematical analysis

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Real-World Wireless Network Modeling and Optimization:From Model/Data-Driven Perspective

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Chinese Journal of Electronics 2022年第6期31卷 991-1012页

作者： LI Yang ZHANG Shutao REN Xiaohui ZHU Jianhang HUANG Jiajie HE Pengcheng SHEN Kaiming YAO Zhiqiang GONG Jie CHANG Tsunghui SHI Qingjiang LUO Zhiquan Shenzhen Research Institute of Big Data Pengcheng Lab School of Science and Engineering The Chinese University of Hong Kong (Shenzhen) College of Mathematics and Computational Sciences Xiangtan University School of Computer Science and Engineering Sun Yat-Sen University School of Software Engineering Tongji University

With the rapid development of the fifth-generation wireless communication systems, a profound revolution in terms of transmission capacity, energy efficiency, reliability, latency, and connectivity is highly expected to support a new batch of industries and applications. To achieve this goal, wireless networks are becoming extremely dynamic, heterogeneous, and complex. The modeling and optimization for the performance of realworld wireless networks are extremely challenging due to the difficulty to predict the network performance as a function of network parameters, and the prohibitively huge number of parameters to optimize. The conventional network modeling and optimization approaches rely on drive test, trial-and-error, and engineering experience,which are labor intensive, error-prone, and far from optimal. On the other hand, while the research community has spent significant efforts in understanding the fundamental limits of radio channels and developing physical layer techniques to operate close to it, very little is known about the performance limits of wireless networks, where millions of radio channels interact with one another in complex manners. This paper reviews the very recent mathematical and learning based techniques for modeling and optimizing the performance of real-world wireless networks in five aspects, including channel modeling, user demand and traffic modeling, throughput modeling and prediction, network parameter optimization, and IRS empowered performance optimization, and also presents the corresponding notable performance gains.

关键词： network parameter optimization telecommunication computing optimisation mathematical techniques wireless channels performance optimization learning based techniques telecommunication traffic mathematical analysis physical layer techniques channel modeling wireless network modeling fifth generation wireless communication systems learning (artificial intelligence) model-data-driven perspective IRS empowered performance optimization radio channels traffic modeling radio networks

Analytical Approach to Space- and *** Burgers Equations

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Chinese Physics Letters 2010年第9期27卷 38-41页

作者： Ahmet Yildirim Syed Tauseef Mohyud-Din Department of Mathematics Ege University 35100 Bornova-Izmir Turkey HITEC University Taxila Cantt Pakistan

A scheme is developed to study numerical solution of the space- and time-fractional Burgers equations under initial conditions by the homotopy analysis method. The fractional derivatives are considered in the Caputo sense. The solutions are given in the form of series with easily computable terms. Numerical solutions are calculated for the fractional Burgers equation to show the nature of solution as the fractional derivative parameter is changed.

关键词： BURGERS' equation SPACE & time DIFFERENTIAL equations -- Numerical solutions HOMOTOPY theory FRACTIONAL calculus mathematical analysis

Evolutionary Prisoner＇s Dilemma on a Weighted Scale-Free Network

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Chinese Physics Letters 2010年第7期27卷 1-4页

作者：程洪艳李海红代琼琳杨俊忠 School of Science Beijing University of Posts and Telecommunications Beijing 100876 Department of Physics Beijing Normal University Beijing 100875

We investigate the evolutionary prisoner＇s dilemma on a weighted scale-free network where the diversity of teaching ability is introduced to the network in the form of weight. Though the diversity of teaching ability is not a sufficient condition for the enhancement of cooperation, we find that the degree-dependent teaching ability plays an active role in the evolution of cooperation. A new phenomenon is found when the degree-dependent teaching ability is used： the distribution of the cooperator frequency displays a two-peak structure for a certain parameter range. We also investigate the effects of the degree-degree correlation of the network on the evolution of cooperation in the presence of the diversity of the teaching ability.

关键词： PRISONER'S dilemma game DISTRIBUTION (Probability theory) CORRELATION (Statistics) TEACHING ABILITY mathematical analysis

Entanglement of Superpositions of Orthogonal Maximally Entangled States

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Chinese Physics Letters 2010年第9期27卷 31-33页

作者：张道花周端陆范桁 Institute of Physics Chinese Academy of Sciences Beijing 100190

We study the entanglement properties of the superposed state of orthogonal maximally entangled states. It is shown that the superposed state is maximally entangled and the superposed state is separable. The relation b... 详细信息

关键词： SUPERPOSITION principle (Physics) ORTHOGONALIZATION (Numerical analysis) QUANTUM theory mathematical analysis SEPARABLE algebras