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Fuzzy　Consistent　Matrix　and　Its　Application

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Journal of Systems Engineering and Electronics 1997年第1期8卷 57-64页

作者： Yao, Min zhang, sen Hangzhou Univ China

This paper presents a kind of fuzzy consistent matrix and introduces its application in analytic hierarchy process and adaptive fuzzy reasoning.

关键词： Fuzzy consistent matrix Analytic hierarchy process Fuzzy reasoning.

Robust exponential stability analysis of a larger class of discrete-time recurrent neural networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第12期8卷 1912-1920页

作者： zhang Jian-hai zhang sen-lin LIU Mei-qin Department of System Science ＆ Engineering School of Electrical Engineering Zhejiang University Hangzhou 310027 China

The robust exponential stability of a larger class of discrete-time recurrent neural networks (RNNs) is explored in this paper. A novel neural network model, named standard neural network model (SNNM), is introduced to provide a general framework for stability analysis of RNNs. Most of the existing RNNs can be transformed into SNNMs to be analyzed in a unified way. Applying Lyapunov stability theory method and S-Procedure technique, two useful criteria of robust exponential stability for the discrete-time SNNMs are derived. The conditions presented are formulated as linear matrix inequalities (LMIs) to be easily solved using existing efficient convex optimization techniques. An example is presented to demonstrate the transformation procedure and the effectiveness of the results.

关键词： Standard neural network model (SNNM) Robust exponential stability Recurrent neural networks (RNNs) Discrete-time Time-delay system Linear matrix inequality (LMI)

The art of designing carbon allotropes

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Frontiers of physics 2019年第1期14卷 5-21页

作者： Run-sen zhang Jin-Wu Jiang Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai University Shanghai 200072 China

Stimulated by the success of graphene and diamond, a variety of carbon allotropes have been discovered in recent years in either two-dimensional or three-dimensional configurations. Although these emerging carbon allotropes share some common features, they have certain different and novel mechanical or physical properties. In this review, we present a comparative survey of some of the major properties of fifteen newly discovered carbon allotropes. By comparing their structural topology, we propose a general route for designing most carbon allotropes from two mother structures, namely, graphene and diamond. Furthermore, we discuss several future prospects as well as current challenges in designing new carbon allotropes.

关键词： carbon allotropes mechanical properties

Predictive factors and model validation of post-colon polyp surgery Helicobacter pylori infection

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World Journal of Gastrointestinal Surgery 2024年第1期16卷 173-185页

作者： Zheng-sen zhang Health Management Center Affiliated Hospital of Shaoxing University(Shaoxing Municipal Hospital)Shaoxing 312000Zhejiang ProvinceChina

BACKGROUND Recently,research has linked Helicobacter pylori(***)stomach infection to colonic inflammation,mediated by toxin production,potentially impacting colorectal cancer *** To investigate the risk factors for post-colon polyp surgery,*** infection,and its correlation with pathologic *** Eighty patients who underwent colon polypectomy in our hospital between January 2019 and January 2023 were retrospectively *** were then randomly split into modeling(n=56)and model validation(n=24)sets using *** modeling cohort was divided into an ***-infected group(n=37)and an ***-uninfected group(n=19).Binary logistic regression analysis was used to analyze the factors influencing the occurrence of *** infection after colon polyp surgery.A roadmap prediction model was established and ***,the correlation between the different pathological types of colon polyps and the occurrence of *** infection was analyzed after colon polyp *** Univariate results showed that age,body mass index(BMI),literacy,alcohol consumption,polyp pathology type,high-risk adenomas,and heavy diet were all influential factors in the development of *** infection after intestinal *** multifactorial logistic regression analysis showed that age,BMI,and type of polyp pathology were independent predictors of the occurrence of *** infection after intestinal *** area under the receiver operating characteristic curve was 0.969[95%confidence interval(95%CI):0.928–1.000]and 0.898(95%CI:0.773–1.000)in the modeling and validation sets,*** slope of the calibration curve of the graph was close to 1,and the goodness-of-fit test was P>0.05 in the two *** decision analysis curve showed a high rate of return in both *** results of the correlation analysis between different pathological types and the occurrence of *** infection after colon polyp surgery showed that hyperplastic

关键词： Colon polyps Helicobacter pylori Risk factors Pathologic type Columnar graphic modeling

Mutual-information based weighted fusion for target tracking in underwater wireless sensor networks

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Frontiers of Information Technology & Electronic Engineering 2018年第4期19卷 544-556页

作者： Duo zhang Mei-qin LIU sen-lin zhang Zhen FAN Qun-fei zhang State Key Laboratory of Industrial Control Technology Zhejiang University College of Electrical Engineering Zhejiang University School of Marine Science and Technology Northwestern Polytechnical University

Underwater wireless sensor networks(UWSNs)can provide a promising solution to underwater target *** to limited energy and bandwidth resources,only a small number of nodes are selected to track a target at each *** all measurements are fused together to provide information in a fusion center,fusion weights of all selected nodes may affect the performance of target *** far as we know,almost all existing tracking schemes neglect this *** study a weighted fusion scheme for target tracking in ***,because the mutual information(MI)between a node’s measurement and the target state can quantify target information provided by the node,it is calculated to determine proper fusion ***,we design a novel multi-sensor weighted particle filter(MSWPF)using fusion weights determined by ***,we present a local node selection scheme based on posterior Cramer-Rao lower bound(PCRLB)to improve tracking ***,simulation results are presented to verify the performance improvement of our scheme with proper fusion weights.

关键词： Target tacking Fusion weight Mutual information Node selection Underwater wireless sensor networks

Optimal control for spatial-temporal distributed nonlinear autoregressive with exogenous inputs correlation model of steel rolling reheating furnace: a coordinated time-sharing control approach

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Control Theory and Technology 2023年第2期21卷 190-211页

作者： Qingfeng Bao sen zhang Jin Guo Zhiqiang Li Zhenquan zhang School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Knowledge Automation for Industrial Processes Ministry of EducationBeijing 100083China Hesteel Group Company Limited Shijiazhuang 050031HebeiChina

Accurate control of slab temperature and heating rate is an important significance to improve product performance and reduce carbon emissions for steel rolling reheating furnace(SRRF).Firstly,a spatial temporal distributed-nonlinear autoregressive with exogenous inputs correlation model(STD-NARXCM)to spatial temporal distributed-autoregressive with exogenous inputs correlation model(STD-ARXCM)in working point is ***,a new coordinated time-sharing control architecture in different time periods is proposed,which is along the length of the SRRF to improve the control ***,a hybrid control algorithm of expert-fuzzy is proposed to improve the dynamic of the temperature and the heating rate during time period 0 to t_(1).A hybrid control algorithm of expert-fuzzy-PID is proposed to enhance the control accuracy and the heating rate during time period t_(1) to t_(2).A hybrid control algorithm of expert-active disturbance rejection control(ADRC)is proposed to boost the anti-interference and the heating rate during time period t_(2) to t_(3).Finally,the experimental results show that the coordinated time-sharing algorithm can meet the process requirements,the maximum deviation of temperature value is 8-13.5℃.

关键词： Steel rolling reheating furnace Spatial-temporal distribution Coordinated time-sharing control Controller structure in different periods Hybrid control algorithm

H_∞ reference tracking control design for a class of nonlinear systems with time-varying delays

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Frontiers of Information Technology & Electronic Engineering 2015年第9期16卷 759-768页

作者： Mei-qin LIU Hai-yang CHEN sen-lin zhang State Key Laboratory of Industrial Control Technology Zhejiang University College of Electrical Engineering Zhejiang University

This paper investigates the H∞ trajectory tracking control for a class of nonlinear systems with time- varying delays by virtue of Lyapunov-Krasovskii stability theory and the linear matrix inequality （LMI） technique. A unified model consisting of a linear delayed dynamic system and a bounded static nonlinear operator is introduced, which covers most of the nonlinear systems with bounded nonlinear terms, such as the one-link robotic manipulator, chaotic systems, complex networks, the continuous stirred tank reactor （CSTR）, and the standard genetic regulatory network （SCRN）. First, the definition of the tracking control is given. Second, the H∞ performance analysis of the closed-loop system including this unified model, reference model, and state feedback controller is presented. Then criteria on the tracking controller design are derived in terms of LMIs such that the output of the closed-loop system tracks the given reference signal in the H∞ sense. The reference model adopted here is modified to be more flexible. A scaling factor is introduced to deal with the disturbance such that the control precision is improved. Finally, a CSTR system is provided to demonstrate the effectiveness of the established control laws.

关键词： H∞ reference tracking Nonlinear system State feedback control Time-varying delays Unified model

Energy-efficient localization and target tracking via underwater mobile sensor networks

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Frontiers of Information Technology & Electronic Engineering 2018年第8期19卷 999-1012页

作者： Hua-yan CHEN Mei-qin LIU sen-lin zhang State Key Laboratory of Industrial Control Technology Zhejiang University College of Electrical Engineering Zhejiang University

Underwater mobile sensor networks(UMSNs) with free-floating sensors are more suitable for understanding the immense underwater environment. Target tracking, whose performance depends on sensor localization accuracy, is one of the broad applications of UMSNs. However, in UMSNs, sensors move with environmental forces,so their positions change continuously, which poses a challenge on the accuracy of sensor localization and target tracking. We propose a high-accuracy localization with mobility prediction(HLMP) algorithm to acquire relatively accurate sensor location estimates. The HLMP algorithm exploits sensor mobility characteristics and the multistep Levinson-Durbin algorithm to predict future positions. Furthermore, we present a simultaneous localization and target tracking(SLAT) algorithm to update sensor locations based on measurements during the process of target tracking. Simulation results demonstrate that the HLMP algorithm can improve localization accuracy significantly with low energy consumption and that the SLAT algorithm can further decrease the sensor localization error. In addition, results prove that a better localization accuracy will synchronously improve the target tracking performance.

关键词： Underwater mobile sensor networks Energy-efficient sensor localization Target tracking

Long non-coding RNAs: From disease code to drug role

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Acta Pharmaceutica Sinica B 2021年第2期11卷 340-354页

作者： Yuanyuan Chen Zhaojun Li Xiaoguang Chen sen zhang State Key Laboratory of Bioactive Substances and Functions of Natural Medicines Institute of Materia MedicaChinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100050China

Enormous studies have corroborated that long non-codig RNAs(LncRNAs)extensively participate in crucial physiological processes such as metabolism and immunity,and are closely related to the occurrence and development of tumors,cardiovascular diseases,nervous system disorders,nephropathy,and other *** application of lncRNAs as biomarkers or intervention targets can provide new insights into the diagnosis and treatment of *** paper has focused on the emerging research into lncRNAs as pharmacological targets and has reviewed the transition of IncRNAs from the role of disease coding to acting as drug candidates,including the current status and progress in preclinical ***-edge strategies for lncRNA modulation have been summarized,including the sources of LncRNA-related drugs,such as genetic technology and small-molecule compounds,and related delivery *** current progress of clinical trials of lncRNA-targeting drugs is also *** information will form a latest updated reference for research and development of lncRNA-based drugs.

关键词： LncRNAs Targeted drug Gene therapy Small molecules Delivery ASncmtRNA Translational medicine Clinical trials