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Research on the self-defence electronic jamming decision-making based on the discrete dynamic Bayesian network

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Journal of Systems Engineering and Electronics 2008年第4期19卷 702-708页

作者： tang zheng Gao Xiaoguang School of Electronic and Information Northwestern Polytechnical Univ. Xi' an 710072 P. R. China

The manner and conditions of running the decision-making system with self-defense electronic jamming are given. After proposing the scenario of applying discrete dynamic Bayesian network to the decision making with self-defense electronic jamming, a decision-making model with self-defense electronic jamming based on the discrete dynamic Bayesian network is established. Then jamming decision inferences by the aid of the algorithm of discrete dynamic Bayesian network are carried on. The simulating result shows that this method is able to synthesize different targets which are not predominant. In this way, various features at the same time, as well as the same feature appearing at different time complement mutually; in addition, the accuracy and reliability of electronic jamming decision making are enhanced significantly.

关键词： self-defense electronic jamming discrete dynamic Bayesian network decision-making model

Approximation Algorithms on k-Correlation Clustering

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Journal of the Operations Research Society of China 2023年第4期11卷 911-924页

作者： Zhong-zheng tang Zhuo Diao School of Science Beijing University of Posts and TelecommunicationsBeijing100876China School of Statistics and Mathematics Central University of Finance and EconomicsBeijing100081China

In this paper,we consider the k-correlation clustering *** an edge-weighted graph G(V,E)where the edges are labeled either“+”(similar)or“−”(different)with nonnegative weights,we want to partition the nodes into at most k-clusters to maximize agreements—the total weights of“+”edges within clusters and“−”edges between *** problem is *** design an approximation algorithm with the approximation ratio{a,(2-k)a+k-1/k},where a is the weighted proportion of“+”edges in all *** a varies from 0 to 1,the approximation ratio varies from k-1/k to 1 and the minimum value is 1/2.

关键词： k-Correlation clusters Approximation algorithms Choosing the better of two solutions

Coordinated Bayesian optimal approach for the integrated decision between electronic countermeasure and firepower attack

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Journal of Systems Engineering and Electronics 2010年第3期21卷 449-454页

作者： zheng tang Xiaoguang Gao Chao Sun School of Marine Engineering Northwestern Polytechnical University Xi'an 710072 R R. China School of Electronics and Information Northwestern Polytechnical University Xi'an 710129 P. R. China

The coordinated Bayesian optimization algorithm（CBOA） is proposed according to the characteristics of the function independence,conformity and supplementary between the electronic countermeasure（ECM） and the firepower attack *** selection criteria are combinations of probabilities of individual fitness and coordinated degree and can select choiceness individual to construct Bayesian network that manifest population evolution by producing the new *** the CBOA cannot only guarantee the effective pattern coordinated decision-making mechanism between the populations,but also maintain the population multiplicity,and enhance the algorithm *** simulation result confirms the algorithm validity.

关键词： electronic countermeasure firepower attack coordinated Bayesian optimization algorithm(CBOA).

Approximation Algorithms on k-Cycle Transversal and k-Clique Transversal

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Journal of the Operations Research Society of China 2021年第4期9卷 883-892页

作者： Zhong-zheng tang Zhuo Diao School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China School of Statistics and Mathematics Central University of Finance and EconomicsBeijing 100081China

Given a weighted graph G=(V,E)with weight w:E→Z+,a k-cycle transversal is an edge subset A of E such that G−A has no *** minimum weight of kcycle transversal is the weighted transversal number on k-cycle,denoted byτk(Gw).In this paper,we design a(k−1/2)-approximation algorithm for the weighted transversal number on k-cycle when k is *** a weighted graph G=(V,E)with weight w:E→Z+,a k-clique transversal is an edge subset A of E such that G−A has no *** minimum weight of k-clique transversal is the weighted transversal number on k-clique,denoted byτapproximation algorithm for the weighted transversal number on k(Gw).In this paper,we design a(k2−k−1)/***,we discuss the relationship between k-clique covering and k-clique packing in complete graph Kn.

关键词： k-cycle transversal k-clique transversal Approximation algorithms

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碳族单质超导性的第一性原理研究

原子与分子物理学报 2025年第4期42卷 87-92页

作者：韩沛辰林永熠郑磊刘其军刘正堂高娟西南交通大学物理科学与技术学院成都610031 西北工业大学凝固技术国家重点实验室西安710072

同为第四主族的元素,碳、硅、锗、锡、铅具有相似的价电子排布,但超导性却并不相同.锡和铅在常压下即可实现超导,硅和锗则需要在高压下才具有超导性,而碳的常规晶体结构在常压和高压下均尚未发现其超导性.压力在很大程度上是通过改变晶... 详细信息

同为第四主族的元素,碳、硅、锗、锡、铅具有相似的价电子排布,但超导性却并不相同.锡和铅在常压下即可实现超导,硅和锗则需要在高压下才具有超导性,而碳的常规晶体结构在常压和高压下均尚未发现其超导性.压力在很大程度上是通过改变晶体结构和原子之间的位置进而影响其超导性,本论文基于密度泛函理论的第一性原理计算,对碳、硅、锗、锡、铅五种第四主族元素的单质的晶体结构、电子结构、声子性质以及超导性质进行系统地对比分析.计算结果表明费米能级附近的电子态密度越高,金属体系实现超导所需的压力越小.在具有金属性的体系中价带靠近费米能级处带隙的存在会使电子更容易局域在费米能级附近,从而增大费米能级附近电子态的数目并提高体系的超导性.此研究为探究超导机制并提高材料的超导性提供思路.

关键词：超导性第一性原理计算碳族元素电子结构

Immunobiology of COVID-19: Mechanistic and therapeutic insights from animal models

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Zoological Research 2024年第4期45卷 747-766页

作者： Hong-Yi zheng Tian-Zhang Song Yong-tang zheng State Key Laboratory of Genetic Evolution&Animal Models KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesCenter for Biosafety Mega-ScienceKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China National Resource Center for Non-Human Primates National Research Facility for Phenotypic&Genetic Analysis of Model Animals(Primate Facility)Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650107China

The distribution of the immune system throughout the body complicates in vitro assessments of coronavirus disease 2019(COVID-19)immunobiology,often resulting in a lack of reproducibility when extrapolated to the whole ***,developing animal models is imperative for a comprehensive understanding of the pathology and immunology of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)*** review summarizes current progress related to COVID-19 animal models,including non-human primates(NHPs),mice,and hamsters,with a focus on their roles in exploring the mechanisms of immunopathology,immune protection,and long-term effects of SARS-CoV-2 infection,as well as their application in immunoprevention and immunotherapy of SARS-CoV-2 *** among these animal models and their specific applications are also highlighted,as no single model can fully encapsulate all aspects of *** effectively address the challenges posed by COVID-19,it is essential to select appropriate animal models that can accurately replicate both fatal and non-fatal infections with varying courses and *** animal model libraries and associated research tools is key to resolving the global COVID-19 pandemic,serving as a robust resource for future emerging infectious diseases.

关键词： SARS-CoV-2 COVID-19 Animal models Infection immunology Immunotherapy

Microseismic event waveform classification using CNN-based transfer learning models

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International Journal of Mining Science and Technology 2023年第10期33卷 1203-1216页

作者： Longjun Dong Hongmei Shu zheng tang Xianhang Yan School of Resources and Safety Engineering Central South UniversityChangsha 410083China International College of Digital Innovation Chiang Mai UniversityChiang Mai 50200Thailand

The efficient processing of large amounts of data collected by the microseismic monitoring system(MMS),especially the rapid identification of microseismic events in explosions and noise,is essential for mine disaster ***,this work is primarily performed by skilled technicians,which results in severe workloads and *** this paper,CNN-based transfer learning combined with computer vision technology was used to achieve automatic recognition and classification of multichannel microseismic signal ***,data collected by MMS was generated into 6-channel original waveforms based on *** that,sample data sets of microseismic events,blasts,drillings,and noises were established through manual *** datasets were split into training sets and test sets according to a certain proportion,and transfer learning was performed on AlexNet,GoogLeNet,and ResNet50 pre-training network models,*** training and tuning,optimal models were retained and compared with support vector machine *** show that transfer learning models perform well on different test ***,GoogLeNet performed best,with a recognition accuracy of 99.8%.Finally,the possible effects of the number of training sets and the imbalance of different types of sample data on the accuracy and effectiveness of classification models were discussed.

关键词： Mine safety Machine learning Transfer learning Microseismic events Waveform classification Image identification and classification

The voltage loss in organic solar cells

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Journal of Semiconductors 2023年第1期44卷 7-9页

作者： zheng tang Liming Ding State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

The power conversion efficiency(PCE)for donor-accepto bulk-heterojunction organic solar cells(OSCs)has reached~20%[1-3],approaching that for inorganic solar cells,due to the development of key photoactive materials[4-14].The short-circuit current density(Jsc)and the fill factor(FF)fo state-of-the-art OSCs are already close to the thermodynam ic upper limit predicted by Shockley-Queisser theory[15],but the open-circuit voltage(Voc)is low,limiting the overall per formance of OSCs.

关键词： approaching limiting limit

Monkeypox,wild animals,and potential big problem

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Zoological Research 2022年第4期43卷 612-614页

作者： Tian-Zhang Song Yong-tang zheng Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China National Resource Center for Non-Human Primates National Research Facility for Phenotypic&Genetic Analysis of Model Animals(Primate Facility)Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650107China

A new outbreak of monkeypox virus(MPV)is currently occurring in several regions of the *** the beginning of May 2022,3040 cases have been reported to the World Health Organization(WHO)*** of its usual“endemic”base in Africa,the virus has so far been detected in 47 countries,including in Europe,America,Oceania,and Asia,where monkeypox is uncommon or previously *** 25 June 2022,the WHO Emergency Committee declared that the outbreak does not currently constitute a Public Health Emergency of International Concern,but unanimously acknowledged the emergency nature of the event and that controlling further spread will require a vigorous ***,new cases of MPV infection have been confirmed in Korea,Singapore,and Taiwan,***,a better understanding of MPV and enhanced surveillance are essential for preventing disease recurrence.

关键词： globally Taiwan currently