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A joint optimization algorithm for focused energy delivery in precision electronic warfare

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Defence Technology（防务技术） 2022年第4期18卷 709-721页

作者： zhong-ping yang Shu-ning yang Qing-song Zhou Jian-yun Zhang Zhi-hui Li zhong-rui Huang College of Electronic Engineering National University of Defense TechnologyHe FeiChina

Focused energy delivery(FED) is a technique that can precisely bring energy to the specific region,which arouses wide attention in precision electronic warfare(PREW).This paper first proposes a joint optimization model with respect to the locations of the array and the transmitted signals to improve the performance of *** the problem is nonconvex and NP-hard,particle swarm optimization(PSO) is adopted to solve the locations of the array,while designing the transmitted signals under a feasible array is considered as a unimodular quadratic program(UQP) subproblem to calculate the fitness criterion of *** the PSO-UQP framework established,two methods are presented for the UQP subproblem,which are more efficient and more accurate respectively than previous ***,a threshold value is set in the framework to determine which method to adopt to take full advantages of the methods ***,we obtain the maximum localization error that FED can tolerate,which is significant for implementing FED in *** results are provided to demonstrate the effectiveness of the joint optimization algorithm,and the correctness of the maximum localization error derived.

关键词： Focused energy delivery Localization error Particle swarm optimization Precision electronic warfare Unimodular quadratic program

The Hyperspace of the Regions below Continuous Maps with the Fell Topology

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Acta Mathematica Sinica,English Series 2012年第1期28卷 57-66页

作者： zhong Qiang yang Bao Can ZHANG Department of Mathematics Shantou UniversityShantou 515063P.R.China Chengyi College Jimei UniversityXiamen 361021P.R.China

For a Tychonoff space X, we use ↓USCF（X） and↓CF（X） to denote the families of the hypographs of all semi-continuous maps and of all continuous maps from X to I = [0, 1] with the subspace topologies of the hyperspace Cldf（X × I） consisting of all non-empty closed sets in X × I endowed with the Fell topology. In this paper, we shall show that there exists a homeomorphism h： ↓USCF（X） → Q = [-1, 1]^∞ such that h（↓ CF（X））： co ： {（Xn） E Q ｜ limn→ ∞ xn = O} if and only if X is a locally compact separable metrizable space and the set of isolated points is not dense in X.

关键词： Fell topology hyperspace upper semi-continuous Hilbert cube

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1405-1412页

作者： Lian zhong yang Hong Xun YI School of Mathematics & Systems Science Shandong University Ji'nan 250100 P. R. China

In this paper, we prove several results concerning meromorphic functions f and g of hyperorder less than one such that f^（j） and g^（j） have the same zeros and poles for j=0, 1, 2. We provide some examples to show ... 详细信息

关键词： meromorphic functions uniqueness sharing values

Doubly charged Higgs production at future ep colliders

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Chinese Physics C 2022年第6期46卷 102-113页

作者： Xing-Hua yang zhong-Juan yang School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China School of Physics and Technology University of JinanJinan 250022China

The Higgs sector of the standard model can be extended by introducing an SU(2)_(L) Higgs tripletΔto generate tiny neutrino masses in the framework of the type-Ⅱseesaw *** this paper,we study the pair production of the introduced Higgs triplet at future e-p *** corresponding production cross sections via the vector boson fusion process at the FCC-ep and ILC■FCC are predicted,where the production of a pair of doubly charged Higgs is found to be dominant and then used to investigate the collider phenomenology of the Higgs *** on the size of the Higgs triplet vacuum expectation value,the doubly charged Higgs may decay into a pair of same-sign charged leptons or a pair of same-sign W *** explore the discovery potential of the doubly charged Higgs at future e-p colliders,we discuss these two decay scenarios in detail and show their detection sensitivity based on the mass of the doubly charged Higgs.

关键词： type-Ⅱseesaw doubly charged Higgs e-p collision

Rationalization of regioselectivity of electrophilic substitution reaction for cyclic compounds in terms of D_(pb) values

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Chinese Chemical Letters 2015年第5期26卷 553-556页

作者： yang Liu zhong-Zhi yang Dong-Xia Zhao School of Chemistry and Chemical Engineering Liaoning Normal University

Accepted theories predict that substitution reactions are controlled by the electronic nature of the attacked site for electrophilic aromatic substitution. Here it is shown that in addition the bond strength of the broken bond may also influence the regioselectivity of the substitution reaction, and that the Dpb is a good indicator of the strength of a chemical bond. The Dpb denotes the depth of the potential acting on one electron in a molecule at the bond center （bc）. In this letter, the values of Dpb along the C-H and N-H bonds have been investigated, and it is demonstrated that for aromatic compounds, the regioselectivity of the electrophilic substitution can well be rationalized in terms of Dpb values.

关键词： Dpb Substitution reaction Regioselectivity Bond strength

The Research and Development of Hot Rolling Marine Sorbite Rail Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 756-761页

作者： yang zhong-min JI Yu China Iron & Steel Res Inst Grp Cent Iron & Steel Res Inst Beijing Peoples R China Wuhan Iron & Steel Grp Corp Wuhan Peoples R China

This article describes research and development results of the hot-rolled air-cooled fine lamellar pearlite (sorbite) rail,by the optimal regulation of chemical *** cross section of rail is fine pearlite (sorbite),whi... 详细信息

关键词： hot rolling air cooled rail steel sorbite corrosion resistance

H_∞ Synchronization of Chaotic Systems via Delayed Feedback Control

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International Journal of Automation and computing 2010年第2期7卷 230-235页

作者： Li Sheng Hui-zhong yang Institute of Measurement and Process Control Jiangnan University Wuxl 214122 PRC Institute for Systems Research University of Maryland College Park 20740 USA

The H∞ synchronization problem for a class of delayed chaotic systems with external disturbance is investigated. A novel delayed feedback controller is established under which the chaotic master and slave systems are synchronized with a guaranteed H∞ performance. Based on the Lyapunov stability theory, a delay-dependent condition is derived and formulated in the form of linear matrix inequality （LMI）. A numerical simulation is also presented to validate the effectiveness of the developed theoretical results.

关键词： Chaotic systems H∞ synchronization delayed feedback control Lyapunov theory linear matrix inequality (LMI).

A U(4)QCD Model Using Generalized yang-Mills Theory

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Communications in Theoretical Physics 2008年第9期50卷 703-706页

作者： WANG Dian-Fu zhong Hai-yang Department of Physics Dalian Maritime University Dalian 116026 China

Generalized yang-Mills theory has a covariant derivative which contains both vector and pseudoscalargauge *** on this theory,we construct a U(4) strong interaction model By using this U(4) generalizedyang-Mills model,we obtain that mesons can be realized as the colorless pseudoscalar gauge *** also obtain agauge potential solution which can be used to explain the asymptotic behavior and color confinement.

关键词： QCD model yang-Mills theory

Effect of feeding parameters on ingot segregation and shrinkage pore in vacuum arc remelting

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Journal of Iron and Steel Research International 2023年第6期30卷 1268-1278页

作者： Dong-bin Jiang Fu-zhong yang Jian Zhang yang Zhou Li-feng Zhang School of Metallurgy and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Chengdu Advanced Metal Materials Industrial Technology Institute Chengdu 610303SichuanChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The feeding parameters in the final stage of vacuum arc remelting process obviously affect the solute segregation and shrinkage pore *** with the electromagnetic field,fluid flow,and solute transport,a numerical model was built to investigate the effect of feeding parameters on the ingot solidification *** Nb segregation and shrinkage pore depth in the solidified ingot were *** results show that the liquid moves along the solidification front and the vertex flow is formed in the liquid pool,which promotes solute *** the solidified ingot,the Nb segregation in the lower part is negative,while that in the upper part is *** the differential electrode applied,the positive segregation is slightly reduced but the segregation distribution remains *** the feeding current decreases,the positive segregation zone moves toward the ingot top surface,due to the final solidification position moving *** the feeding time extended,the positive segregation moves to the top surface and the shrinkage pore depth is *** the feeding time is set at 12 min,the shrinkage pore depth can be reduced to 21 mm.

关键词： Vacuum arc remelting Feeding parameter Macrosegregation Shrinkage pore Solidification