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Chaotification of a Continuous Stable Complex Network via Impulsive Control

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Journal of Systems Science & Complexity 2015年第6期28卷 1271-1278页

作者： LIU Na guan Zhihong School of Electric and Information Engeering Zhengzhou University of Light Industry

A method is proposed to chaotify a class of complex networks via impulsive control, when the orbits of the impulsive systems are confined in a bounded area. Based on computing the largest Lyapunov exponent, theoretical results and algorithmic analysis are given in details. Finally, numerical simulations are presented to illustrate the effectiveness of the method.

关键词： Chaotification complex network impulsive control largest Lyapunov exponent

A stepwise optimal design of water network

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Chinese Journal of Chemical Engineering 2016年第6期24卷 787-794页

作者： Ying Li Jintao guan Department of Environmental and Chemical Engineering Dalian Jiaotong University

In order to take full advantage of regeneration process to reduce fresh water consumption and avoid the accumulation of trace contaminants, regeneration reuse and regeneration recycle should be distinctive. A stepwise optimal design for water network is developed to simplify solution procedures for the formulated MINLP problem. In this paper, a feasible water reuse network framework is generated. Some heuristic rules from water reuse network are used to guide the placement of regeneration process. Then the outlet stream of regeneration process is considered as new water source. Regeneration reuse network structure is obtained through an iterative optimal procedure by taking the insights from reuse water network structure. Furthermore, regeneration recycle is only utilized to eliminate fresh water usage for processes in which regeneration reuse is impossible. Compared with the results obtained by relevant researches for the same example, the present method not only provides an appropriate regeneration reuse water network with minimum fresh water and regenerated water flow rate but also suggests a water network involving regeneration recycle with minimum recycle water flow rate. The design can utilize reuse, regeneration reuse and regeneration recycle step by step with minor water network structure change to achieve better flexibility. It can satisfy different demands for new plants and modernization of existing plants.

关键词： Water networkReuseRegeneration reuseRegeneration recycleStepwise

The stress-thermal equivalence“memory effect”in glass materials

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 175-176页

作者： Pengfei guan Beijing Computational Science Research Center Beijing 100193China

Glass materials,including metallic,organic,and silicate glasses,are crucial in various engineering applications due to their unique disordered atomic packing ***,these materials suffer from stress decay under constant... 详细信息

关键词： glasses glass stress

P_1-nonconforming triangular finite element method for elliptic and parabolic interface problems

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Applied Mathematics and Mechanics(English Edition) 2015年第9期36卷 1197-1212页

作者： Hongbo guan Dongyang SHI College of Mathematics and Information Sciences Zhengzhou University of Light Industry School of Mathematics and Statistics Zhengzhou University

The lowest order Pl-nonconforming triangular finite element method （FEM） for elliptic and parabolic interface problems is investigated. Under some reasonable regularity assumptions on the exact solutions, the optimal order error estimates are obtained in the broken energy norm. Finally, some numerical results are provided to verify the theoretical analysis.

关键词： P1-nonconforming finite element method (FEM) interface problem opti-mal order error estimate

Editorial of Virtual Special Issue on Progress in Medicinal Chemistry

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Acta Pharmaceutica Sinica B 2016年第5期6卷 510-511页

作者： Xiangming guan Department of Pharmaceutical Sciences College of PharmacySouth Dakota State University

Editorial Drug target identification is a key step in the development of effective therapeutic *** this issue,we present the current status of some validated and potential targets in drug discovery for developing therapeutic agents for the treatment of cancer,inflammation,cardiovascular diseases,neurodegenerative diseases,HIV,and influenza A virus.I am indebted to my colleagues for their cooperation and efforts to find time from their busy schedule

关键词： cooperation schedule cardiovascular inflammation validated maturation migration physiological overview disciplines

The analysis of the bending stiffness and intensity of cylindrical tubes

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Science China(Technological Sciences) 2007年第3期50卷 268-278页

作者： SONG YuQuan guan ZhiPing NIE YuQin guan XiaoFang Superplastic and Plastic Research Institute Jilin UniversityChangchun 130025China Department of Engineering Mechanics Institute of Mechanical Science and EngineeringJilin UniversityChangchun 130025China

Based on the mechanics of material,the bending stiffness and intensity of cylin-drical bar and tube are analyzed. By comparing the cylindrical tube whose ratio of outside diameter to internal diameter is 0.7 with the cylindrical bar,it is concluded that when both of them have the same mass,the section stiffness of the cylindrical tube is three times that of the cylindrical bar;when both of them have the same external diameter,the mass of the cylindrical tube is only 1/2 that of the cylindrical bar,but the section stiffness of the cylindrical tube is 3/4 that of the cylindrical bar. By virtue of the elemental elastic-plastic theory,the yield stress of the liquid-filled cylindrical tube is investigated. Due to the incompressibility of liquid and the strain hardening effect of material,the yield stress of the liquid-filled tube is enlarged compared with the hollow tube,thus raising its bending intensity. Under the dy-namic load,compared with the hollow tube,the impact resistance of the liquid-filled tube is also raised due to elastic recovery. Because the hydraulic pressures per-pendicular to the inner surface are identical everywhere,the local stress concen-tration resulting from the ovalisation of the tube would be decreased,and the re-sistance to buckling would be improved.

关键词： bending of cylindrical tube liquid filled stiffness intensity

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铜银纳米合金团簇结构转变的原子模拟

原子与分子物理学报 2025年第6期42卷 101-112页

作者：李博宇刘贯惟张林东北大学材料科学与工程学院沈阳110819 东北大学材料各向异性与织构教育部重点实验室沈阳110819

采用基于嵌入原子方法势的分子动力学方法对熔融Cu_(n)Ag_(53-n)(n=0~53)和Cu_(n)Ag_(54-n)(n=0~54)合金团簇的降温凝结过程进行模拟.通过结构相图、自由能、原子化能、形状因子、对分布函数、熵和直观可视化的原子堆积结构等多种计算... 详细信息

采用基于嵌入原子方法势的分子动力学方法对熔融Cu_(n)Ag_(53-n)(n=0~53)和Cu_(n)Ag_(54-n)(n=0~54)合金团簇的降温凝结过程进行模拟.通过结构相图、自由能、原子化能、形状因子、对分布函数、熵和直观可视化的原子堆积结构等多种计算分析手段,在原子尺度上探究温度、组分和初始构型等对小尺寸Cu-Ag合金团簇在降温凝结中的结构转变以及热力学量的影响.模拟结果表明,在室温下含有少量Cu原子的二元合金团簇可以形成的核壳式二十面体几何结构,同时Cu原子取代Ag原子也有助于合金团簇的稳定.组分的改变和温度的降低使堆积结构由无序变为有序,同时伴随着原子势能、形状因子、熵的振荡下降,低温阶段熵值下降明显.

关键词：纳米合金降温凝结分子动力学结构转变

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Polaron, molecule and pairing in one-dimensional spin-l/2 Fermi gas with an attractive Delta-function interaction

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Frontiers of physics 2012年第1期7卷 8-15页

作者： Xi-Wen guan Department of Theoretical Physics Research School of Physics and Engineering Australian National University Canberra Australia

Using solutions of the discrete Bethe ansatz equations, we study in detail the quantum impurity problem of a spin-down fermion immersed into a fully ploarized spin-up Fermi sea with weak attrac- tion. We prove that this impurity fermion in the one-dimensional （1D） fermionic medium behaves like a polaron for weak attraction. However, as the attraction grows, the spin-down fermion binds with one spin-up fermion from the fully-polarized medium to form a tightly bound molecule. Thus it is seen that the system undergos a crossover from a mean field polaron-like nature into a mixture of excess fermions and a bosonic molecule as the attraction changes from weak attraction into strong attraction. This polaron-molecule crossover is universal in 1D many-body systems of interacting fermions. In a thermodynamic limit, we further study the relationship between the Fredholm equa- tions for the 1D spin-l/2 Fermi gas with weakly repulsive and attractive delta-function interactions.

关键词： spin-1/2 Fermi gas polaron molecule Fredholm equations

Theoretical fundamentals of short pulse laser–metal interaction: A review

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Nanotechnology and Precision Engineering 2020年第3期3卷 105-125页

作者： Xinxin Li Yingchun guan School of Mechanical Engineering&Automation Beihang UniversityBeijing 100083China National Engineering Laboratory of Additive Manufacturing for Large Metallic Components Beihang UniversityBeijing 100083China

Short and ultrashort pulse lasers offer excellent advantages in laser precision machining mainly because of their high pulse energy and low ablation threshold. The complex process of laser interaction with metals limits the indepth investigation into laser ablation. Numerical simulation is important in the study of fundamental mechanisms. This review explores the start-of-the-art methods for the theoretical simulation of the laser ablation of metals, including plasma formation and expansion. Laser-induced period surface structures are also studied.

关键词： Laser-material interaction Nanosecond laser Femtosecond laser Metals Simulation