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A Looped Functional Method to Design State Feedback Controllers for Lurie Networked Control Systems

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IEEE/CAA Journal of Automatica Sinica 2023年第4期10卷 1093-1095页

作者： Wei Wang hong-Bing zeng The authors are with the School of Electrical and Information Engineering Hunan University of TechnologyZhuzhou 412007China

Dear Editor,This letter deals with the stabilization of Lurie networked control systems with network-induced delays(NID).By constructing a twosided looped Lyapunov functional,a sufficient condition is derived to ensure the absolute stability of the resultant closed-loop system under a state feedback ***,based on this condition,a cone complementary linearisation(CCL)iterative algorithm is presented to design state feedback *** is shown via a numerical example that the proposed method can deliver less conservative results as well as fewer iterations if compared with existing ones.

关键词： network sided stabilization

Inverse Ising techniques to infer underlying mechanisms from data

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Chinese Physics B 2020年第8期29卷 1-23页

作者： hong-Li zeng Erik Aurell School of Science New Energy Technology Engineering Laboratory of Jiangsu ProvinceNanjing University of Posts and TelecommunicationsNanjing 210023China Nordita Royal Institute of Technologyand Stockholm UniversitySE-10691 StockholmSweden KTH-Royal Institute of Technology AlbaNova University CenterSE-10691 StockholmSweden Faculty of Physics Astronomy and Applied Computer ScienceJagiellonian University30-348 KrakowPoland

As a problem in data science the inverse Ising(or Potts)problem is to infer the parameters of a Gibbs-Boltzmann distributions of an Ising(or Potts)model from samples drawn from that *** algorithmic and computational interest stems from the fact that this inference task cannot be carried out efficiently by the maximum likelihood criterion,since the normalizing constant of the distribution(the partition function)cannot be calculated exactly and *** practical interest on the other hand flows from several outstanding applications,of which the most well known has been predicting spatial contacts in protein structures from tables of homologous protein *** applications to date have been to data that has been produced by a dynamical process which,as far as it is known,cannot be expected to satisfy detailed *** is therefore no a priori reason to expect the distribution to be of the Gibbs-Boltzmann type,and no a priori reason to expect that inverse Ising(or Potts)techniques should yield useful *** this review we discuss two types of problems where progress nevertheless can be *** find that depending on model parameters there are phases where,in fact,the distribution is close to Gibbs-Boltzmann distribution,a non-equilibrium nature of the under-lying dynamics *** also discuss the relation between inferred Ising model parameters and parameters of the underlying dynamics.

关键词： inverse Ising problem kinetic Ising model statistical genetics fitness reconstruction

Bacterial diversity in soils around a lead and zinc mine

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Journal of Environmental Sciences 2007年第1期19卷 74-79页

作者： HU Qing QI hong-yan zeng Jing-hai ZHANG hong-xun Department of Environmental Biotechnology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Five samples of soil collected from a lead and zinc mine were used to assess the effect of combined contamination of heavy metals on soil bacterial communities using a polyphasic approach including characterization of isolates by culture method, community level catabolic profiling in BIOLOG GN microplates, and genetic community fingerprinting by denaturing gradient gel electrophoresis of 16S rDNA fragments amplified by PCR from community DNA （PCR-DGGE）. The structure of the bacterial community was affected to a certain extent by heavy metals. The PCR-DGGE analysis of 16S rRNA genes showed that there were significant differences in the structure of the microbial community among the soil samples, which were related to the contamination levels. The number of bacteria and the number of denaturing gradient gel electrophoresis （DGGE） bands in the soils increased with increasing distance from the lead and zinc mine tailing, whereas the concentration of lead （Pb） and cadmium （Cd） was decreased. Heavily polluted soils could be characterized by a community that differs from those of lightly polluted soils in richness and structure of dominating bacterial populations. The clustering analysis of the DGGE profiles showed that the bacteria in all the five samples of soil belonged to three clusters. The data from the BIOLOG analysis also showed the same result. This study showed that heavy metal contamination decreased both the biomass and diversity of the bacterial community in soil.

关键词： BIOLOG system DGGE heavy metal microbial diversity soils

Iodine-catalyzed Efficient Synthesis of β-Keto Esters from Aldehydes and Ethyl Diazoacetate Under Solvent-free Conditions

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Chemical Research in Chinese Universities 2009年第3期25卷 343-346页

作者： WANG hong-she zeng Jun-e Shaanxi Key Laboratory for Phytochemistry Department of Chemistry and Chemical Engineering Baoji University of Arts and Sciences Baoji 721013 P. R. China

An efficient procedure for the synthesis ofβ-keto esters from the reaction of aldehydes and ethyl diazoacetate catalyzed by iodine at room temperature under solvent-free conditions has been described. The catalytic p... 详细信息

关键词： Iodine β-Keto ester Aldehyde Ethyl diazoacetate

Influencing factors of fear of falling among glaucoma patients in west China:a cross-sectional study

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International Journal of Ophthalmology(English edition) 2023年第4期16卷 563-570页

作者： Jie Ren Xin Zhang hong Lin Ji-hong zeng Department of Ophthalmology West China HospitalSichuan University/West China School of NursingSichuan UniversityChengdu 610041Sichuan ProvinceChina

AIM:To investigate the current situation and influencing factors of fear of falling in glaucoma patients in western ***:In this cross-sectional study,glaucoma patients treated in the Ophthalmology Department of West China Hospital of Sichuan University were conducted to investigate the demographic data,visual acuity,visual field,activities of daily living,risk of falling,fear of falling and psychological *** linear model was used for multivariate analysis with fear of falling as dependent variable and other factors as independent ***:The mean score of the Chinese version modified Fall Efficacy Scale(MFES)was 7.52±2.09 *** analysis and multivariate analysis showed that the history of falls within one year,visual acuity,visual field,risk of falling,activities of daily living and psychological states had statistically difference on fear of falling(P<0.05).CONCLUSION:Glaucoma patients in west China have relatively high risk of fear of *** of falling within 1y,severe visual function impairment,high risk of falling,incapable of independence of daily living,and abnormal psychological state are risk factors of fear of falling among glaucoma patients.

关键词： glaucoma fear of falling influencing factors

Four first records of trichodinid (Ciliophora： Peritrichia) ectoparasites from cultured molluscs and fishes in China

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Acta Oceanologica Sinica 2018年第10期37卷 91-97页

作者： ZHAN Zifeng zeng hong LIN Nengfeng XU Kuidong Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Fujian Normal University Fuzhou 350007 China Institute of Biotechnology Fujian Academy of Agriculture Science Fuzhou 350003 China Center for Ocean Mega-Science Chinese Academy of Sciences Qingdao 266071 China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China University of Chinese Academy of Sciences Beijing 100049 China

Four species of Trichodina parasitizing the gills of cultured molluscs and fishes in China are described： Trichodina pectenis Stein, 1974 from the scallop Mizuhopecten yessoensis; Trichodinajadranica Raabe, 1958 from the fishes Mugil cephalus and Anguilla bicolor bicolor; Trichodina acuta Lorn, 1961 and Trichodina rostrata Kulemina, 1968 from the fish Acrossocheilusfasciatus. The description of T. pectenis presented here first includes both live characters and morphometric data obtained from specimens impregnated using the wet silver nitrate and protargol methods. The other species were revealed by the dry silver nitrate method. Intensities of infestation and comparisons with related species and populations are provided for each of the four.

关键词： taxonomy Trichodina pectenis Trichodina jadranica Trichodina acuta Trichodina rostrata trichodinid ciliates

Prevalence of post-traumatic stress disorder after earthquakes among the elderly in China: A meta-analysis

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World Journal of Emergency Medicine 2021年第2期12卷 137-142页

作者： Yong Liang hong zeng Yu-geng Liu Ai-min Xu Wen-hong Liu Emergency Medicine Clinical Research Center Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100043China

BACKGROUND: The study aims to investigate the occurrence of post-traumatic stress disorder(PTSD) after earthquakes among the elderly. METHODS: Data from cross-sectional studies focusing on the prevalence of PTSD after earthquakes among the elderly were collected from Pub Med, EMBASE, Cochrane Library, and China National Knowledge Infrastructure in December 2019. The search terms included post-traumatic stress disorder, earthquake, and elderly. This study used Review Manager 5.0 to evaluate the impact of the results. In addition, forest plots, sensitivity analysis, and bias analysis were carried out on the included articles. The combined estimate of the risk ratio and the standard deviation of the 95% confidence interval(95% CI) were measurements of the size of the ***: There were 4,834 patients included from 10 eligible studies. The sample sizes of PTSD group and non-PTSD group were 1,277 and 3,557, respectively. The meta-analysis showed that the overall occurrence of PTSD after earthquakes among the elderly was 0.25;the occurrence in females was higher than that in males, and the occurrence in the same province indicated little difference(Wenchuan city 0.25 and Ya'an city 0.24).CONCLUSIONS: After earthquakes, the occurrence of PTSD is higher among the elderly than among other age groups, and higher among the females than among the males, while there is little difference among different areas within the same province. This indicated that prioritized specific psychological interventions should be provided to the aged and the females.

关键词： Post-traumatic stress disorder The elderly Earthquake

Self-healing Hydrogelsand Underlying Reversible Intermolecular Interactions

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Chinese Journal of Polymer Science 2021年第10期39卷 1246-1261,I0005页

作者： Meng Wu Qiong-Yao Peng Lin-Bo Han hong-Bo zeng Department of Chemical&Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China

Self-healing hydrogels have attracted growing attention over the past decade due to their biomimetic structure,biocompatibility,as well as enhanced lifespan and reliability,thereby have been widely used in various biomedical,electrical and environmental engineering *** feature article has reviewed our recent progress in self-healing hydrogels derived from mussel-inspired interactions,multiple hydrogen-bonding functional groups such as 2-ureido-4[1H]-pyrimidinohe(UPy),dynamic covalent bonds(eg,Schiff base reactions and boronic ester bonds).The underlying molecular basics of these interactions,hydrogel preparation principles,and corresponding performances and applications are *** underlying reversible intermolecular interaction mechanisms in these hydrogels were investigated using nanomechanical techniques such as surface forces apparatus(SFA)and atomic force microscopy(AFM),providing fundamental insights into the self-healing mechanisms of the *** remaining challenging issues and perspectives in this rapidly developing research area are also discussed.

关键词： Self-healing hydrogels Mussel-inspired Interaction Multiple hydrogen-bonding Dynamic covalent bonds Intermolecular forces

Magneto-Caloric Effect of Gd5Si2Ge2Compounds under Different Processing Conditions

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Journal of Rare Earths 2004年第z1期22卷 76-78页

作者： zeng hong Yue Ming Niu Peili Zhang Jiuxing Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of TechnologyBeijing 100022 China

The magneto-caloric effect of Gd5 Si2Ge2 compounds produced by various techniques is investigated in terms of their magnetization behaviors in the magnetic field from 0 to 2.0 *** studied materials include arc-melted, annealed and sintered *** results demonstrate that the Gd5Si2Ge2 alloys obtained under different processing conditions possess distinct magneto-caloric effect due to their various *** annealing treatment can enhance the magneto-caloric effect of the alloy *** the sintered alloy bears relatively lower value of magnetic entropy change ( △ SM) than arc-melted *** magnetic entropy change of the annealed Gd5 Si2Ge2 alloy arrives the arrives the maximum value of - △SM = 15.29 J· kg-1· K-1 for magnetic field change under 2.0 T in the present work.

关键词： magneto-caloric effect processing conditions Gd5Si2Ge2 magnetic entropy change