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On a class of two-dimensional Finsler manifolds of isotropic S-curvature

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Science China Mathematics 2018年第1期61卷 57-72页

作者： Xinyue cheng Zhongmin shen Guojun Yang School of Mathematics and Statistics Chongqing University of Technology Department of Mathematical Sciences Indiana University-Purdue University Department of Mathematics Sichuan University

For an(α, β)-metric(non-Randers type) of isotropic S-curvature on an n-dimensional manifold with non-constant norm ‖β‖α, we first show that n = 2, and then we characterize such a class of two-dimensional(α, β)... 详细信息

关键词： (α,β)-metric Randers metric S-curvature

A game-theoretic method for prediction of microgrid growing trends in China

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Science China(Technological Sciences) 2015年第10期58卷 1760-1766页

作者： ZHAO min shen Chen LIU Feng HUANG XiuQiong State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Department of Electrical EngineeringTsinghua University Guangxi Power Grid Corporation China Southern Grid

This paper presents a game-theoretic method to predict microgrid(MG) development tendency in China. As many distribution generators(DGs) are integrated in distribution systems, analysis of MG formation necessity is conducted from the aspect of DGs. In order to maximize the profit brought by DGs and to earn money from arbitrage, it may be necessary for customers to combine their DGs and loads and to construct an MG to obtain maximal control ability. A game model is built to emulate trading between MGs and the distribution system based on MG power control, in which both trading profit and outage cost are considered for each MG. Nash equilibrium(NE) is calculated, and sensitivities of NE to some boundary conditions are studied. The results show that variable MG trading prices with appropriate net generation cost(i.e., DG generation cost minus government subsidy price) may encourage the growth of MGs. Government subsidies, generation costs, and trading prices may also affect DG use, and therefore they may impact customer motivation to build MGs.

关键词： microgrid game distributed generation smart grid

A QUADRATIC OBJECTIVE PENALTY FUNCTION FOR BILEVEL PROGRAMminG

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Journal of Systems Science & Complexity 2014年第2期27卷 327-337页

作者： JIANG min MENG Zhiqing shen Rui XU Xinsheng College of Business and Administration Zhejiang University of Technology

The bilevel programming is applied to solve hierarchical intelligence control problems in such fields as industry, agriculture, transportation, military, and so on. This paper presents a quadratic objective penalty function with two penalty parameters for inequality constrained bilevel programming. Under some conditions, the optimal solution to the bilevel programming defined by the quadratic objective penalty function is proved to be an optimal solution to the original bilevel programming. Moreover, based on the quadratic objective penalty function, an algorithm is developed to l^nd an optimal solution to the original bilevel programming, and its convergence proved under some conditions. Furthermore, under the assumption of convexity at function without lower level problems is defined and lower level problems, a quadratic objective penalty is proved equal to the original bilevel programming.

关键词： Algorithm bilevel programming penalty function quadratic objective.

GENERATING EXACT NONLINEAR RANKING FUNCTIONS BY SYMBOLIC-NUMERIC HYBRID METHOD

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Journal of Systems Science & Complexity 2013年第2期26卷 291-301页

作者： shen Liyong WU min YANG Zhengfeng ZENG Zhenbing School of Mathematical Sciences Graduate University of Chinese Academy of Sciences Shanghai Key Laboratory of Trustworthy Computing East China Normal University

This paper presents a hybrid symbolic-numeric algorithm to compute ranking functions for establishing the termination of loop programs with polynomial guards and polynomial *** authors first transform the problem into a parameterized polynomial optimization problem,and obtain a numerical ranking function using polynomial sum-of-squares relaxation via semidefinite programming(SDP).A rational vector recovery algorithm is deployed to recover a rational polynomial from the numerical ranking function,and some symbolic computation techniques are used to certify that this polynomial is an exact ranking function of the loop *** last,the authors demonstrate on some polynomial loop programs from the literature that our algorithm successfully yields nonlinear ranking functions with rational coefficients.

关键词： Program verification ranking function semidefinite programming symbolic-numeric hybrid method.

Secure fusion of encrypted remote sensing images based on Brovey

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Science China(Information Sciences) 2021年第2期64卷 243-245页

作者： Junzhi YANG Guohua cheng Meng shen School of Information and Electronics Beijing Institute of Technology School of Computer Science Beijing Institute of Technology Key Lab of Information Network Security of ministry of Public Security (The Third Research Institute of ministry of Public Security)

Dear editor,In the field of image fusion, panchromatic images captured by the Satellite Pour l’Observation de la Terre(SPOT) [1]have high spatial resolutions, whereas their spectral resolutions are relatively low. On the other hand, multispectral images have high spectral resolutions; however, their spatial resolutions are low. Because the two types of images captured by satellites cannot meet the demand [2], image fusion is generally necessary in practice.

关键词： Information Systems and Communication Service

Structural characterization of steam-heat treated Tectona grandis wood analyzed by FT-IR and 2D-IR correlation spectroscopy

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Chinese Chemical Letters 2015年第2期26卷 221-225页

作者： ming-Yu Li Shi-Chao cheng Dan Li shen-Nan Wang An-min Huang Su-Qin Sun Research Institute of Wood Industry Chinese Academy of Forestry Department of Wood Science and Technology Beijing Forestry University Department of Chemistry Tsinghua University

The properties of wood can be improved through steam-heat *** are many studies about mechanical properties of steam-heat treated wood,but very few studies are on the aspects of chemical *** this study,FT-IR spectra combined with SD-IR spectra,correlation coefficients and 2DIR spectra are employed to analyze the chemical modifications of teak[Tectona grandis L.F.） wood during steam-heat treatment under treatment temperatures from 120 ℃ to 220 ℃ at intervals of 20 ℃.Acetic acid,which is produced during steam-heat treatment,acts as a catalyst of condensation and degradation reactions of wood *** changes of wood components are more and more intense with increasing the treatment *** sensitivity of wood samples to thermal perturbation rises initially with increasing treatment temperature before falling *** steam-heat treated wood under180℃ is the most sensitive.

关键词： Teak wood Steam-heat treatment FT-IR spectroscopy The correlation coefficients 2D-IR spectroscopy

A QUANTUM MULTI-AGENT BASED NEURAL NETWORK MODEL FOR FAILURE PREDICTION

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Journal of Systems Science and Systems Engineering 2016年第2期25卷 210-228页

作者： Wei Wu min Liu Qing Liu Weiming shen School of Electronic and Information Engineering Tongji University Shanghai 201804 China The Key Laboratory of Embedded System and Service Computing Ministry of EducationTongji University Shanghai 200092 China

An effective prognostic program is crucial to the predictive maintenance of complex equipment since it can improve productivity, prolong equipment life, and enhance system safety. This paper proposes a novel technique for accurate failure prognosis based on back propagation neural network and quantum multi-agent algorithm. Inspired by the extensive research of quantum computing theory and multi-agent systems, the technique employs a quantum multi-agent strategy, with the main characteristics of quantum agent representation and several operations including fitness evaluation, cooperation, crossover and mutation, for parameters optimization of neural network to avoid the deficiencies such as slow convergence and liability of getting stuck to local minima. To validate the feasibility of the proposed approach, several numerical approximation experiments were firstly designed, after which real vibrational data of bearings from the Laboratory of Cincinnati University were analyzed and used to assess the health condition for a given future point. The results were rather encouraging and indicated that the presented forecasting method has the potential to be utilized as an estimation tool for failure prediction in industrial machinery.

关键词： Failure prediction complex equipment quantum-inspired multi-agent algorithm back propagation neural network

Using the Haddon matrix to explore medical response strategies for terrorist subway bombings

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Military Medical Research 2019年第4期6卷 320-327页

作者： Tie-cheng Yan min Yu Institute of Health Service and Transfusion Medicine Academy of Military Medical SciencesNo.27 Taiping RoadBeijing 100850China

Background:Since the 1970 s,terrorist bombings in subways have been frequently occurring *** cope with this threat and to provide medical response countermeasures,we analyzed the characteristics of subway bombing terrorist attacks and used the Haddon matrix to explore medical response ***:First,we analyzed 111 subway bombings from 1970 to 2017 recorded in the Global Terrorism Database to provide a reference for the strategy ***,we convened an expert panel to use the Haddon matrix to explore the medical response strategies to subway ***:In recent decades,at least one bombing attack occurs every 3 *** by the Haddon matrix,the influencing factors of medical responses to conventional subway bombings include the adequacy of first-aid kits and the medical evacuation equipment,the traffic conditions affecting the evacuation,the continuity and stability of communication,as well as the factors exclusively attributed to dirty bomb attacks in subways,such as ionizing radiation protection capabilities,the structure of the radiation sickness treatment network based on the subway lines,and the disposal of radioactive *** factors form the basis of the strategy ***:Since subway bombings are long-term threats,it is necessary to have proper medical response *** on the Haddon matrix,we explored the medical response strategies for terrorist subway bombings,especially dirty bomb *** matrix can help policymakers systematically find the most important factors,which makes the preparations of the response more efficient.

关键词： Haddon matrix Subway Terrorism Bomb attack Medical response

Optimum Detecting Arrays for Independent Interaction Faults

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Acta Mathematica Sinica,English Series 2016年第2期32卷 199-212页

作者： Ce SHI cheng min WANG School of Mathematics and Information Science Shanghai Lixin University of Commerce School of Science Jiangnan University

The use of detecting arrays （DTAs） is motivated by the need to locate and detect interaction faults arising between the factors in a component-based system in software testing. The optimality and construction of DTAs have been investigated in depth for the case in which all the interaction faults are assumed to have the same strength; however, as a practical concern, the strengths of these faults are not always identical. For real world applications, it would be desirable for a DTA to be able to identify and detect faulty interactions of a strength equal to or less than a specified value under the assumption that the faulty interactions are independent from one another. To the best of our knowledge, the optimality and construction of DTAs for independent interaction faults have not been studied systematically before, In this paper, we establish a general lower bound on the size of DTAs for independent interaction faults and explore the combinatorial feature that enable these DTAs to meet the lower bound. Taking advantage of this combinatorial characterization, several classes of optimum DTAs meeting the lower bound are presented.

关键词： Detecting arrays super-simple independent interaction faults optimum