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Dynamic behaviors of the lump solutions and mixed solutions to a(2+1)-dimensional nonlinear model

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Communications in Theoretical Physics 2023年第5期75卷 52-61页

作者： Si-Jia Chen xing lü Yu-Hang Yin Department of Mathematics Beijing Jiaotong UniversityBeijing 100044China Beijing laboratory of National Economic Security Early-warning Engineering Beijing Jiaotong UniversityBeijing 100044China

In this paper,we propose a combined form of the bilinear Kadomtsev-Petviashvili equation and the bilinear extended(2+1)-dimensional shallow water wave equation,which is linked with a novel(2+1)-dimensional nonlinear *** model might be applied to describe the evolution of nonlinear waves in the *** the effect of a novel combination of nonlinearity and dispersion terms,two cases of lump solutions to the(2+1)-dimensional nonlinear model are derived by searching for the quadratic function solutions to the bilinear ***,the one-lump-multi-stripe solutions are constructed by the test function combining quadratic functions and multiple exponential *** one-lump-multi-soliton solutions are derived by the test function combining quadratic functions and multiple hyperbolic cosine *** behaviors of the lump solutions and mixed solutions are analyzed via numerical *** result is of importance to provide efficient expressions to model nonlinear waves and explain some interaction mechanism of nonlinear waves in physics.

关键词： bilinear form test function mixed solutions dynamic behaviors

Steiner Tree Based Optimal Resource Caching Scheme in Fog Computing

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China Communications 2015年第8期12卷 161-168页

作者： SU Jingtao lIN Fuhong ZHOU Xianwei lü xing School of Computer and Communication Engineering University of Science and Technology Beijing School of Science Beijing Jiaotong University

Fog Computing is a new platform that can serve mobile devices in the local area. In Fog Computing, the resources need to be shared or cached in the widely deployed Fog clusters. In this paper, we propose a Steiner tree based caching scheme, in which the Fog servers, when caching resources, first produce a Steiner tree to minimize the total path weight(or cost) such that the cost of resource caching using this tree could be minimized. Then we give a running illustration to show how the Fog Computing works and we compare the traditional shortest path scheme with the proposed one. The outcome shows that the Steiner tree based scheme could work more efficiently.

关键词： steiner Tree resource caching fogcomputing architecture

Amygdala-Inspired Affective Computing: to Realize Personalized Intracranial Emotions with Accurately Observed External Emotions

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China Communications 2019年第8期16卷 115-129页

作者： Chao Gong Fuhong lin Xianwei Zhou xing lü School of Computer and Communication Engineering University of Science and Technology Beijing

Artificial intelligence technology has revolutionized every industry and trade in recent years. However, its own development is encountering bottlenecks that it is unable to implement empathy with human emotions. So affective computing is getting more attention from researchers. In this paper, we propose an amygdala-inspired affective computing framework to realize the recognition of all kinds of human personalized emotions. Similar to the amygdala, the instantaneous emergency emotion is first computed more quickly in a low-redundancy convolutional neural network compressed by pruning and weight sharing with hashing trick. Then, the real-time process emotion is identified more accurately by the memory level neural networks, which is good at handling time-related signals. Finally, the intracranial emotion is recognized in personalized hidden Markov models. We demonstrate on Facial Expression of Emotion Dataset and the recognition accuracy of external emotions(including the emergency emotion and the process emotion) reached 85.72%. And the experimental results proved that the personalized affective model can generate desired intracranial emotions as expected.

关键词： affective computing emotion recognition personalized machines external emotions intracranial emotions

localized characteristics of lump and interaction solutions to two extended Jimbo–Miwa equations

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Chinese Physics B 2020年第12期29卷 174-180页

作者： Yu-Hang Yin Si-Jia Chen xing lü Department of Mathematics Beijing Jiaotong UniversityBeijing 100044China Beijing laboratory of National Economic Security Early-warning Engineering Beijing Jiaotong UniversityBeijing 100044China

We focus on the localized characteristics of lump and interaction solutions to two extended Jimbo–Miwa *** on the Hirota bilinear method and the test function method,we construct the exact solutions to the extended equations including lump solutions,lump–kink solutions,and two other types of interaction solutions,by solving the underdetermined nonlinear system of algebraic equations for associated ***,analysis and graphical simulation are presented to show the dynamical characteristics of our solutions and the interaction behaviors are revealed.

关键词： Hirota bilinear method test function method lump solution interaction solution symbolic computation

DMMF: Dominant and Max-Min Fair Allocation in Satellite Networks

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China Communications 2015年第S2期12卷 149-154页

作者： lIN Fuhong ZHENG Yi ZHOU Xianwei lü xing School of Computer and Communication Engineering University of Science and Technology Beijing Network Technology Research Institute China United Network Communications Corporation Limited School of Science Beijing Jiaotong University

Resource allocation is crucial for satellite networks. In this paper, we propose a multi-resource fair allocation scheme, namely Dominant and Max-min Fair(DMMF), to efficiently and fairly allocate resources. It consists of two allocation stages, dominant resource fair(DRF) allocation stage and max-min fairness(MMF) allocation stage. The proposed DMMF scheme exhibits desirable properties, including share incentive, strategy proofness, envy freeness and Pareto optimality. Meanwhile, DMMF can improve the allocation efficiency and reach 100% allocation efficiency.

关键词： dominant resource fair(DRF) max-min fair(MMF) network efficiency satellite network

Enamine Configuration of 5-Methyl-2-phenyl-4- [(Z)-3-tolylamino-phenylmethylene]pyrazol-3(2H)-one

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Chinese Journal of Structural Chemistry 2005年第8期24卷 957-961页

作者： QIAO Yu-Qin lü xing-Qiang BAO Feng KANG Bei-Sheng School of Chemistry and Chemical Engineering Sun Yat-Sen University ChinaGuangzhou 510275

Compound 5-methyl-2-phenyl-4-[（Z）-3-tolylamino-phenylmethylene]pyrazol-3（2H）-one （C24H21N3O） crystallizes in the triclinic system, space group P1, with a = 9.267（3）, b = 9.904（4）,c = 12.035（4） A°, α = 97.896（6）, β = 103.865（6）, γ = 107.950（6）°, Mr= 367.44, Z = 2, V = 993.2（6）A°^3,Dc = 1.229 g/cm^3,μ（MoKa） = 0.077 mm^-1 and F（000） = 388. The structure was refined to R =0.0444 and wR = 0.1199 for 2903 observed reflections （I 〉 2σ（I））. The results of ^1H NMR and single-crystal X-ray diffraction studies showed the enamine character of the compound. The strong intramolecular hydrogen bonds in the large conjugate system, together with weak intermolecular C-H……π hydrogen bonding and π……π stacking, lead to the formation of a multi-dimensional supramolecular network.

关键词： 5-methyl-2-phenyl-4-[(Z)-3-tolylamino-phenylmethylene]pyrazol-3(2H)-one,enamine weak interaction snpramolecnlar network

Exact Solutions to a (3+1)-Dimensional Variable-Coefficient Kadomtsev-Petviashvilli Equation via the Bilinear Method and Wronskian Technique

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Communications in Theoretical Physics 2009年第9期52卷 468-472页

作者： ZHANG Chcng TIAN Bo XU Tao lI li-li lü xing GENG Tao ZHU Hong-Wu School of Science P.O. Box 122 Beijing University of Posts and Telecommunications Beijing 100876 China State Key laboratory of Software Development Environment Beijing University of Aeronautics and Astronautics Beijing 100191 China Key laboratory of Information Photonics and Optical Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

By truncating the Painleve expansion at the constant level term,the Hirota bilinear form is obtainedfor a (3+1)-dimensional variable-coefficient Kadomtsev-Petviashvili *** on its bilinear form,solitary-wavesolutions are constructed via the ε-expansion method and the corresponding graphical analysis is ***,the exact solution in the Wronskian form is presented and proved by direct substitution into the bilinear equation.

关键词： (3+1)-dimensional variable-coefficient Kadomtsev-Petviashvili equation Wronskian solution bilinear form exact solution

Effect of void nucleation on microstructure and stress state in aluminum alloy tailor-welded blank

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Progress in Natural Science:Materials International 2021年第1期31卷 77-85页

作者： l.xing M.Zhan P.F.Gao M.li Y.D.Dong T.Y.Wang State Key laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University Shaanxi Key laboratory of High-Performance Precision Forming Technology and Equipment Key laboratory of High Performance Manufacturing for Aero Engine (Northwestern Polytechnical University) Ministry of Industry and Information Technology

The microscopic damage initiation characteristic in welded joint greatly determines the subsequent damage evolution and fracture behavior of aluminum alloy tailor-welded blank(TWB) during plastic forming. In this study, the interactive dependence of void nucleation on microstructure and stress state in the welded joint of a2219 aluminum alloy TWB was quantitatively explored by in-situ SEM testing. Moreover, a micromechanical model based on actual microstructure was adopted to reveal the underlying mechanisms from the perspective of microscopic heterogeneous deformation. The results showed that three void nucleation mechanisms, including particle-cracking, interface-debonding and matrix-cracking, coexisted in the deformation at different microstructure regions and stress states. The nucleation strain of each mechanism mainly depended on the particle volume fraction, grain size and stress triaxiality. Besides, the proportions of particle-cracking and interfacedebonding greatly varied with the grain size and particle volume fraction, and the variation law changed with the stress state. The proportion of matrix-cracking had a weak dependence on the microstructure, while increased with the stress triaxiality decreasing. It made the damage initiation in aluminum alloy welded joint transit from particle-cracking dominance to matrix-cracking dominance with the stress triaxiality *** micromechanical modeling results suggested that the changes of evolutions and distributions of Mises stress in particle, hydrostatic stress at interface and plastic strain in matrix with microstructure and stress state were responsible for the above effects.

关键词： Aluminum alloy Welded joint Void nucleation Microstructure Stress state Micromechanical model

Characterization and expression analysis of genes encoding Taxol biosynthetic enzymes in Taxus spp.

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Journal of Forestry Research 2021年第6期32卷 2507-2515页

作者： luyuan Jiang Kaikai Zhang xing lv liying Yang Shuai Wang Duanfen Chen Yanfang Yang Deyou Qiu State Key laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of State Forestry AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091People’s Republic of China College of Horticulture Hebei Agricultural UniversityBaoding 071001People’s Republic of China College of Agronomy Hebei Agricultural UniversityBaoding 071001People’s Republic of China School of Pharmacy Liaocheng UniversityLiaocheng 252000People’s Republic of China

Taxol(Paclitaxel),an important anticancer drug,is derived at very low yields from Taxus(yew)species that grow very *** the present study,thirteen genes that encode enzymes involved in Taxol biosynthesis in Taxus *** analyzed with bioinformatics methods,and their expression levels in different tissues and after cold and hormone treatments were also *** results indicated that many cis-elements related to abiotic stresses and hormones were found in the promoter sequences of the 8 genes involved in Taxol ***,the 13 enzymes encoded by the target genes were located in different organelles and had many phosphorylation sites in the response *** 13 genes were expressed highly either in roots or in stems,with lower transcripts in needles,and they were highly expressed after treatment with cold,gibberellin,methyl jasmonate or coronatine,consistent with predictions based on the bioinformatics *** results suggest that the factors such as hormones and abiotic stresses stimulate taxane biosynthesis in yews,providing an important way to sustainably generate taxanes from yew trees or their cell cultures to improve Taxol yields.

关键词： Gene expression Bioinformatics analysis Acyltransferase Cytochrome P450 Abiotic stress Hormone