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A STATE SPACE ISOMORPHISM THEOREM F0R MINIMAL dYNAMICAL SYSTEMS

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Acta Mathematicae Applicatae Sinica 1991年第1期7卷 34-37页

作者： W.P.dAYAWANSA C.F.MARTIN d.cheng Texas Technical University USATexas Technical UniversityUSATexas Technical UniversityUSA

Consider a discrete time dynamical system x_(k+1)=f(x_k) on a compact metric space M, wheref: M→M is a continuous map. Let h:M→R^k be a continuous output function. Suppose that all ofthe positive orbits of f are dense and that the system is observable. We prove that any outputtrajectory of the system determines f and h and M up to a *** M is a compactAbelian topological group and f is an ergodic translation, then any output trajectory determinesthe system up to a translation and a group isomorphism of the group.

关键词： A STATE SPACE ISOMORPHISM THEOREM F0R MINIMAL dYNAMICAL SYSTEMS lim

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用低温吸附泵获得低压强

国外导弹与航天运载器 1992年第4期 42-47页

作者： d.cheng 符锡理

本文介绍了低温吸附泵的工作原理和分子筛吸附泵的特性,给出了用低温吸附泵单级抽吸和分级抽吸一定容积容器的试验结果。低温吸附技术可应用于液氢、液氧输送管路、贮运容器真空绝热夹层真空度的获得与保持。

关键词：制冷吸附真空低温吸附泵

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电磁场与波 1版

电磁场与波

Synthesis and structure of dyP3O9 crystal

1984年

作者：（美）郑钧（d.cheng）赵姚同黎滨洪译

美国西瑞库斯((Syracuse)大学david K . cheng,(郑钧)教授毕业于上海交通大学电机系，在美国哈佛大学先后获得硕士和博士学位，现为国际著名的电磁理论和天线学者、上海交大、西北电讯工程学院和北京邮电学院的名誉教授.他在电磁场理论... 详细信息

ISBN: (纸本)13324·0019

美国西瑞库斯((Syracuse)大学david K . cheng,(郑钧)教授毕业于上海交通大学电机系，在美国哈佛大学先后获得硕士和博士学位，现为国际著名的电磁理论和天线学者、上海交大、西北电讯工程学院和北京邮电学院的名誉教授.他在电磁场理论、天线和天线阵列、通信和信号处理等方面都有很高的造诣和杰出的贡献.郑钧教授所著的“线性系统分析即一书在我国翻译出版后，很受欢迎。“电磁场与波，(Field and Wave Electromagnetics)是他的最新著作.

关键词：电磁场电磁波

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Synthesis and structure of DyP3O9 crystal

Theoretical studies of the electronic structure and optical properties of Hg1-xCdxTe

中国化学会第五届全国结构化学学术会议

作者： M.Fang H.Zhang d.Zhao W.-d.cheng~* State Key Laboratory of Structural Chemistry,The Graduate School of the Chinese Academy of Sciences,Fujian Institute of Research on the Structure of Matter,Yang Qiao Xi Road No.155,Fuzhou,Fujian 350002,China,

Crystals of dyP

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Theoretical studies of the electronic structure and optical ...

Investigating Müller glia reprogramming in mice: a retrospective of the last decade, and a look to the future

中国化学会第五届全国结构化学学术会议

作者： S.-P.Huang d.-S.Wu J.Shen Z.Xie H.Zhang W.-d.cheng State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,the Chinese Academy of Sciences,Fuzhou,Fujian 350002,People’s Republic of China.

HgCdTe is an alloy semiconductor that crystallizes in a zinc blende *** to its compositional and temperature dependence of energy gap,HgCdTe has become an important/versatile material for detector applications over th...

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Neural Regeneration Research 2025年第4期20卷 946-959页

作者： Zhiyuan Yin Jiahui Kang Xuan cheng Hui Gao Shujia Huo Haiwei Xu Key Lab of Visual damage and Regeneration&Restoration of Chongqing Southwest Eye HospitalSouthwest HospitalThird Military Medical University(Army Medical University)ChongqingChina

Müller glia,as prominent glial cells within the retina,plays a significant role in maintaining retinal homeostasis in both healthy and diseased *** lower vertebrates like zebrafish,these cells assume responsibility for spontaneous retinal regeneration,wherein endogenous Müller glia undergo proliferation,transform into Müller glia-derived progenitor cells,and subsequently regenerate the entire retina with restored ***,Müller glia in the mouse and human retina exhibit limited neural reprogramming.Müller glia reprogramming is thus a promising strategy for treating neurodegenerative ocular disorders.Müller glia reprogramming in mice has been accomplished with remarkable success,through various *** in molecular,genetic,epigenetic,morphological,and physiological evaluations have made it easier to document and investigate the Müller glia programming process in ***,there remain issues that hinder improving reprogramming efficiency and ***,understanding the reprogramming mechanism is crucial toward exploring factors that will improve Müller glia reprogramming efficiency,and for developing novel Müller glia reprogramming *** review describes recent progress in relatively successful Müller glia reprogramming *** also provides a basis for developing new Müller glia reprogramming strategies in mice,including epigenetic remodeling,metabolic modulation,immune regulation,chemical small-molecules regulation,extracellular matrix remodeling,and cell-cell fusion,to achieve Müller glia reprogramming in mice.

关键词： cell fusion chemical small-molecules epigenetic extracellular matrix immune metabolic mice Müller glia neurodegenerative diseases reprogramming retina regeneration

Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei Xiong Xuan Ye Hongzhang cheng Xiaoming Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3d） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3d crack modes in the interested time ***,we studied the relation of the 3d fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

Spatial transcriptomics combined with single-nucleus RNA sequencing reveals glial cell heterogeneity in the human spinal cord

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Neural Regeneration Research 2025年第11期20卷 3302-3316页

作者： Yali Chen Yiyong Wei Jin Liu Tao Zhu cheng Zhou donghang Zhang department of Anesthesiology West China HospitalSichuan UniversityChengduSichuan ProvinceChina Laboratory of Anesthesia and Critical Care Medicine National-Local Joint Engineering Research Center of Translational Medicine of AnesthesiologyWest China HospitalSichuan UniversityChengduSichuan ProvinceChina department of Anesthesiology Longgang District Maternity&Child Healthcare Hospital of Shenzhen City(Longgang Maternity and Child Institute of Shantou University Medical College)ShenzhenGuangdong ProvinceChina department of Anesthesiology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Glial cells play crucial roles in regulating physiological and pathological functions,including sensation,the response to infection and acute injury,and chronic neurodegenerative *** cells include astrocytes,microglia,and oligodendrocytes in the central nervous system,and satellite glial cells and Schwann cells in the peripheral nervous *** the greater understanding of glial cell types and functional heterogeneity achieved through single-cell and single-nucleus RNA sequencing in animal models,few studies have investigated the transcriptomic profiles of glial cells in the human spinal ***,we used high-throughput single-nucleus RNA sequencing and spatial transcriptomics to map the cellular and molecular heterogeneity of astrocytes,microglia,and oligodendrocytes in the human spinal *** explore the conservation and divergence across species,we compared these findings with those from *** the human spinal cord,astrocytes,microglia,and oligodendrocytes were each divided into six distinct transcriptomic *** the mouse spinal cord,astrocytes,microglia,and oligodendrocytes were divided into five,four,and five distinct transcriptomic subclusters,*** comparative results revealed substantial heterogeneity in all glial cell types between humans and ***,we detected sex differences in gene expression in human spinal cord glial ***,in all astrocyte subtypes,the levels of NEAT1 and CHI3L1 were higher in males than in females,whereas the levels of CST3 were lower in males than in *** all microglial subtypes,all differentially expressed genes were located on the sex *** addition to sex-specific gene differences,the levels of MT-Nd4,MT2A,MT-ATP6,MT-CO3,MT-Nd2,MT-Nd3,and MT-CO_(2) in all spinal cord oligodendrocyte subtypes were higher in females than in ***,the present dataset extensively characterizes glial cell heterogeneity and offers a valuable resource for explo

关键词： astrocyte glial cell human microglia oligodendrocyte sex differentiation single-nucleus RNA sequencing spatial transcriptomics species variation spinal cord

Lipid droplets in the nervous system:involvement in cell metabolic homeostasis

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Neural Regeneration Research 2025年第3期20卷 740-750页

作者： Yuchen Zhang Yiqing Chen cheng Zhuang Jingxuan Qi Robert Chunhua Zhao Jiao Wang School of Life Sciences Shanghai UniversityShanghaiChina School of Medicine Shanghai UniversityShanghaiChina Institute of Basic Medical Sciences Chinese Academy of Medical Sciences School of Basic MedicinePeking Union Medical CollegeBeijingChina Center of Excellence in Tissue Engineering Chinese Academy of Medical SciencesBeijingChina Beijing Key Laboratory of New drug development and Clinical Trial of Stem Cell Therapy BeijingChina

Lipid droplets serve as primary storage organelles for neutral lipids in neurons,glial cells,and other cells in the nervous *** droplet formation begins with the synthesis of neutral lipids in the endoplasmic ***,lipid droplets were recognized for their role in maintaining lipid metabolism and energy homeostasis;however,recent research has shown that lipid droplets are highly adaptive organelles with diverse functions in the nervous *** addition to their role in regulating cell metabolism,lipid droplets play a protective role in various cellular stress ***,lipid droplets exhibit specific functions in neurons and glial *** of lipid droplet formation leads to cellular dysfunction,metabolic abnormalities,and nervous system *** review aims to provide an overview of the role of lipid droplets in the nervous system,covering topics such as biogenesis,cellular specificity,and ***,it will explore the association between lipid droplets and neurodegenerative *** the involvement of lipid droplets in cell metabolic homeostasis related to the nervous system is crucial to determine the underlying causes and in exploring potential therapeutic approaches for these diseases.

关键词： Alzheimer's disease lipid droplet biogenesis lipid droplets lipid metabolism nervous system neurodegenerative disorders oxidative stress Parkinson's disease