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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1836-1848页

作者： wei qian Yanmin Wu Bo Shen School of Electrical Engineering and Automation Henan Polytechnic UniversityJiaozuo 454000China College of Information Science and Technology Donghua UniversityShanghai 201620China

This article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(IT2)fuzzy technique under a differential evolution *** provide a more reasonable utilization of the constrained communication channel,a novel adaptive memory event-triggered(AMET)mechanism is developed,where two event-triggered thresholds can be dynamically adjusted in the light of the current system information and the transmitted historical *** conditions with less conservative design of the fuzzy imperfect premise matching(IPM)controller are presented by introducing the Wirtinger-based integral inequality,the information of membership functions(MFs)and slack ***,under the IPM policy,a new MFs intelligent optimization technique that takes advantage of the differential evolution algorithm is first provided for IT2 TakagiSugeno(T-S)fuzzy systems to update the fuzzy controller MFs in real-time and achieve a better system control ***,simulation results demonstrate that the proposed control scheme can obtain better system performance in the case of using fewer communication resources.

关键词： Adaptive memory event-triggered(AMET) differential evolution algorithm fuzzy optimization robust control interval type-2(IT2)fuzzy technique.

Signal perception during plant-bacteria interactions: from chemicals to physical signals

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Science China(Life Sciences) 2020年第2期63卷 305-307页

作者： Bao-Zhen Ren wei qian State Key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China College of Biological Sciences University of Chinese Academy of SciencesBeijing 100049China Center for Excellence of Biotic Interactions Chinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China

During interactions between host plants and microbes, discrimination between "self" and "nonself" is at the center of many biological relationships and determines the success of infection by microbial pathogens or imm... 详细信息

关键词： Signal immunity signals

Sword in the woods: How plant hosts defend against vascular pathogens

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Journal of Integrative Plant Biology 2022年第8期64卷 1465-1468页

作者： Xin Yin wei qian State Key Laboratory of Plant Genomics Institution of Microbiology Chinese Academy of Sciences

“We shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills”. Winston Churchill’s famous speech inspiring the will to fight is... 详细信息

关键词： pathogens fight beach

Image edge detection based on pulse coupled neural network and modulus maxima in non-subsampled contourlet domain

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The Journal of China Universities of Posts and Telecommunications 2018年第3期25卷 55-64页

作者： Hu Ling Chang Xia qian wei School of Mathematics and Information Science North Minzu University

Edge is the intrinsic geometric structure of an image. Edge detection methods are the key technologies in the lleld of image processing. In this paper, a multi-scale image edge detection method is proposed to effectively extract image geometric features. A source image is decomposed into the high frequency directional sub-bands coefficients and the low frequency sub-bands coefficients by non-subampled contourlet transform （NSCT）. The high frequency sub-bands coefficients are used to detect the abundant details of the image edges by the modulus maxima （MM） algorithm. The low frequency sub-band coefficients are used to detect the basic contour line of the image edges by the pulse coupled neural network （PCNN）. The final edge detection image is reconstructed with detected edge information at different scales and different directional sub-bands in the NSCT domain. Experimental results demonstrate that the proposed method outperforms several state-of-art image edge detection methods in both visual effects and objective evaluation.

关键词： edge detection modulus maxima pulse coupled neural network wavelet transform non-subsampled contourlet transform

Contribution of citizen science towards cryptic species census： “many eyes” define wintering range of the Scaly-sided Merganser in China's Mainland

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Avian Research 2018年第1期9卷 63-72页

作者： Qing Zeng qian wei Guangchun Lei School of Nature Conservation Beijing Forestry University Beijing 100083 China China Birdwatching Association Chengdu 610041 China

Background: Citizen science has tremendous potential in advancing scientific knowledge and improving natural resource *** detect the wintering distribution of the endangered species Scaly-sided Merganser(Mergus squamatus), national wintering surveys were organized by China Birdwatching ***: The surveys of *** were conducted in three successive winters from 2014 to 2016.A total of 2019 people from 102 organizations participated in the *** three groups of 13 environmental variables, species distribution model for its wintering distribution of each year was developed using random ***'s D index was used to compare the distribution of *** in 3 ***: Totally, 441, 634 and 1138 individuals of *** were recorded in 2014, 2015 and 2016 *** main sites in Dabie Mountain and East Qinling mountains were verified and the wintering range of *** was *** wintering range was found to be highly identical for the 3 ***: The highly overlapped distribution range among years suggested that the wintering range of *** was relatively *** organized and coordinated citizen science can be used to define distribution range and improve species conservation.

关键词： Wintering distribution Citizen science Mergus squamatus Random forest

Flutter analyses of complete aircraft based on hybrid grids and parallel computing

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Science China(Technological Sciences) 2013年第2期56卷 398-404页

作者： ZHENG GuanNan YANG Guowei qian wei Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences Shenyang Aircraft Design and Research Institute

A tightly coupled method was developed to analyse aeroelasticity by constructing subiterative schemes for fluid and structural equations of motion,*** MPI partition parallel computing,the fluid was solved by Navier-Stokes equations based on hybrid grids.A new unstructured background grid deformtion method was used for the CFD grid *** transonic flutter wind tunnel model of a complete aircraft was simulated to validate the developed *** flutter characteristics of the aircraft was analysed and compared with the test *** indicates that the devoloped method has a relatively higher precision and can be used for aeronautical engineering application.

关键词： CFD CSD aeroelasticity coupled method flutter MPI

Rhodium-Catalyzed N-Arylation Addition of Arylboronic Acids to Ketimines

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Chinese Journal of Chemistry 2024年第18期42卷 2243-2248页

作者： Xue-wei qian Xing-Wen Sun Department of Chemistry Fudan University220 Handan RoadShanghai 200433China

Herein,we report rhodium catalyzed N-arylation via addition of arylboronic acids to electron-deficientα-iminoesters which can be prepared in high efficiency by using easily accessible B-carbonyl *** reaction is highly regiospecific to achieve the N-aryl addition efficiently with up to 99%yield under mild *** corresponding product can be further efficiently converted into indoles andaseries of other important building blocks.

关键词： Rhodium catalyzed N-Arylation addition Amines Umpolung Indole C-C coupling

Dynamical output feedback stabilization for neutral systems with mixed delays

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第8期9卷 1043-1049页

作者： wei qian Guo-jiang SHEN You-xian SUN State Key Lab of Industrtal Control Technology Zhejiang University Hangzhou 310027 China Department of Computer Science and Technology Henan Polytechnic University Jiaozuo 454000 China

This paper is concerned with the issue of stabilization for the linear neutral systems with mixed delays. The attention is focused on the design of output feedback controllers which guarantee the asymptotical stability of the closed-loop systems. Based on the model transformation of neutral type, the Lyapunov-Krasovskii functional method is employed to establish the delay-dependent stability criterion. Then, through the controller parameterization and some matrix transformation techniques, the desired parameters are determined under the delay-dependent design condition in terms of linear matrix inequalities (LMIs), and the desired controller is explicitly formulated. A numerical example is given to illustrate the effectiveness of the proposed method.

关键词： Neutral systems Mixed delays Output feedback stabilization Linear matrix inequality (LMI)

Developing natural marine products for treating liver diseases

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World Journal of Clinical Cases 2022年第8期10卷 2369-2381页

作者： qian wei Jin-Sheng Guo Department of Gastroenterology and Hepatology Zhongshan HospitalFudan UniversityShanghai 200032China

In recent years,marine-derived bioactive compounds have gained increasing attention because of their higher biodiversity vs land-derived compounds.A number of marine-derived compounds are proven to improve lipid metabolism,modulate the gut microbiota,and possess anti-inflammatory,antioxidant,antibacterial,antiviral,and antitumor *** the increasing understanding of the molecular landscape underlying the pathogenesis of chronic liver diseases,interest has spiked in developing new therapeutic drugs and medicine food homology from marine sources for the prevention and treatment of liver diseases.

关键词： Natural marine products Liver disease Treatment Liver

Particle Measurement Sensor for in situ determination of phase structure of fluidized bed

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Particuology 2009年第3期7卷 175-182页

作者： qiang Zhang Cang Huang Dong Jiang Xiaobo wei Zhen qian Fei wei Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 China

Based on three-dimensional （3D） acceleration sensing, an intelligent particle spy capable of detecting, transferring, and storing data, is proposed under the name of Particle Measurement Sensor （PMS）. A prototype 60-mm-dia PMS was tested to track its freefall in terms of velocity and displacement, and served as a particle spy in a fluidized bed delivering the in situ acceleration information it detects. With increasing superficial gas velocity in the fluidized bed, the acceleration felt by PMS was observed to increase. The variance of the signals, which reflect the fluctuation, increased at first, reaching a maximum at the gas velocity （Uc） which marks the transition from bubbling to turbulent fluidization. Through probability density distribution （PDD） analysis, the PDD peak can be divided into the emulsion phase peak and the bubble phase peak. The average acceleration of emulsion and bubble phase increased, while the variance of both phases reached a maximum at Uc, at the same time. However, the difference between the variances of two phases reached the maximum at Uc. Findings of this study indicate that PMS can record independent in situ information. Further, it can provide other in situ measurements when equipped with additional multi-functional sensors.

关键词： Particle Measurement Sensor Fluidized bed Acceleration Gas-solid two-phase flow Phase structure