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Admissibility analysis and control synthesis for switched linear singular systems

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Journal of Systems Engineering and Electronics 2009年第5期20卷 1037-1044页

作者： lin jinxing Fei Shumin Shen Jiong Key Laboratory of Measurement and Control of CSE Ministry of Education Nanjing 210096 P. R. China School of Energy and Environment Southeast Univ. Nanjing 210096 P. R. China

The problem of admissibility analysis and control synthesis of discrete-time switched linear singular （SLS） systems for arbitrary switching laws is solved. By using the switched Lyapunov function approach, some new sufficient conditions under which the SLS system is admissible for arbitrary switching laws are derived in terms of linear matrix inequalities （LMIs）. Based on the admissibility results, control synthesis is then to design switched state feedback and static output feedback controllers, guaranteeing that the resulting closed-loop system is admissible. The presented results can be viewed as the extensions of previous works on switched Lyapunov function approach from the regular switched systems to singular switched cases. Examples are provided to demonstrate the reduced conservatism and effectiveness of the proposed conditions.

关键词： switched singular systems admissibility switched Lyapunov function switched state feedback switched static output feedback.

Robust stability and stabilization for uncertain discrete-time switched singular systems with time-varying delays

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Journal of Systems Engineering and Electronics 2010年第4期21卷 650-657页

作者： jinxing lin Shumin Fei Jiong Shen Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University Nanjing 210096 P. R. China School of Energy and Environment Southeast University Nanjing 210096 P. R. China

The problems of robust stability and stabilization via memoryless state feedback for a class of discrete-time switched singular systems with time-varying delays and linear fractional uncertainties are *** constructing a novel switched Lyapunov-Krasovskii functional,a delay-dependent criterion for the unforced system to be regular,causal and uniformly asymptotically stable is established in terms of linear matrix inequalities（LMIs）.An explicit expression for the desired memoryless state feedback stabilization controller is also *** merits of the proposed criteria lie in their less conservativeness and relative simplicity,which are achieved by considering additionally useful terms（ignored in previous methods） when estimating the upper bound of the forward difference of the Lyapunov-Krasovskii functional and by avoiding utilizing any model augmentation *** numerical examples are provided to illustrate the validity of the proposed methods.

关键词： discrete-time switched singular system time-varying delay delay-dependent criterion switched Lyapunov-Krasovskii functional robust stability stabilization.

Morphological comparison and gonadotropins cell localization of mature female turbot and mouse pituitary

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Journal of Oceanology and Limnology 2023年第6期41卷 2418-2428页

作者： Yudong JIA Yunhong GAO jinxing lin Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Shanghai Laboratory Animal Research Center Shanghai 201203China

Reproduction is subtlety regulated by the hypothalamic-pituitary-gonad(HPG)axis in *** gland is the center of the HPG axis,while pituitary gonadotropins follicle stimulating hormone(FSH)and luteinizing hormone(LH)were identified the key elements of the HPG axis in teleost and ***,cell lines,and gonadotropins cell localization of female turbot and mouse pituitary were determined at mature stage to illustrate the anatomical difference and cell characteristics in this *** show that turbot pituitary is chicken heart-shaped,dorsoventral,located on the ventral surface of the *** mouse pituitary is oval,located in the pituitary fossa of the sella turcica at the skull *** well-distinguished areas adenohypophysis(AH)and neurohypophysis(NH)in pituitary were identified in turbot and *** AH comprised the rostral pars distalis(RPD),proximal pars distalis(PPD),and pars intermedia(PI).NH was not pronounced and with finger-like protrusions into ***,mouse AH only comprised the pars distalis(PD)and *** distribution was *** main types of cells(acidophilic,basophilic,and chromophobic cells)were distributed in the mouse PD region,whereas appeared in the turbot PPD,RPD,and ***,the percentage of mouse chromophobic and basophilic cells was higher and lower than that of turbot,*** diameter of the aforementioned three cells in the mouse was significantly higher than ***β-and lhβ-immunoreactive signals were identified in turbot-distinct pituitary cells that primarily occupied the peripheral and central regions of ***,mouse fsh-and lh-immunoreactive cells were expressed in the same cells and present in the *** results demonstrate the significantly difference of pituitary morphology,cell lines and gonadotropins(fshβand lhβ)location in female turbot and *** differences help for fully understand the evolution and endocrinological functions of pituitary.

关键词： turbot mouse pituitary gland cell line gonadotropins

Impulsive controller design for nonlinear networked control systems with time delay and packet dropouts

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Journal of Systems Engineering and Electronics 2012年第3期23卷 414-418页

作者： Xianlin Zhao Shumin Fei jinxing lin College of Engineering Nanjing Agricultural University Nanjing 210031 P. R. China College of Automation Southeast University Nanjing 210096 E R. China College of Automation Nanjing University of Posts and Telecommunications Nanjing 210003 E R. China

The globally exponential stability of nonlinear impul- sive networked control systems （NINCS） with time delay and packet dropouts is investigated. By applying Lyapunov function theory, sufficient conditions on the global exponential stability are derived by introducing a comparison system and estimating the corresponding Cauchy matrix. An impulsive controller is explicitly designed to achieve exponential stability and ensure state con- verge with a given decay rate for the system. The Lorenz oscillator system is presented as a numerical example to illustrate the theo- retical results and effectiveness of the proposed controller design procedure.

关键词： nonlinear impulsive networked control system (NINCS) exponential stability packet dropout.

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蛋白质寡聚化的活体检测技术及其研究进展

科学通报 2024年第8期69卷 1034-1046页

作者：罗鹏云李岩竣左新秀钱虹萍徐昌文林金星崔亚宁林木育种与生态修复国家工程研究中心林木遗传育种全国重点实验室树木花卉育种生物工程国家林业和草原局重点实验室北京林业大学生物科学与技术学院北京100083

蛋白质寡聚在许多生理过程中起着非常重要的作用,分析蛋白寡聚化有利于深层次解析蛋白质-蛋白质/配体相互作用、信号转导以及疾病发生相关机制等生物学过程.近年来,随着一些新兴技术的涌现,实时、动态、活体观测蛋白与蛋白相互作用的研... 详细信息

蛋白质寡聚在许多生理过程中起着非常重要的作用,分析蛋白寡聚化有利于深层次解析蛋白质-蛋白质/配体相互作用、信号转导以及疾病发生相关机制等生物学过程.近年来,随着一些新兴技术的涌现,实时、动态、活体观测蛋白与蛋白相互作用的研究已成为热点.通过提高时间分辨率和空间分辨率,可以更准确地观察和研究蛋白质的动态行为和相互作用.同时,新兴技术与算法的结合进一步扩展了对蛋白质在时间和空间尺度上的研究范围,使我们能更深入地探索蛋白质结构与功能之间的关系.本文首先简要介绍了寡聚蛋白质的分类和形成机制,随后从蛋白标记技术和活体检测技术两个方面综述了用于分析蛋白复合体寡聚化的几种主要技术以及其研究进展.最后,展望了蛋白质寡聚化研究的发展前景,希望为研究者在选择适合的分析技术时提供一些理论参考.

关键词：蛋白质寡聚化蛋白质-蛋白质相互作用蛋白质标记活体检测

Regulation of cytoskeleton-associated protein activities: linking cellular signals to plant cytoskeletal function

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Journal of Integrative Plant Biology 2021年第1期63卷 241-250页

作者： Na Lian Xinwei Wang Yanping Jing jinxing lin Bejing Advanced Innovation Center for Tree Breeding by Molecular Design Bejing Forestry UniversityBeiing 100083China College of Biological Sciences and Biotechnology Beiing Forestry UniversityBeiing 100083China

The plant cytoskeleton undergoes dynamic remodeling in response to diverse developmental and environmental cues. Remodeling of the cytoskeleton coordinates growth in plant cells, including trafficking and exocytosis of membrane and wall components during cell expansion, and regulation of hypocotyl elongation in response to light. Cytoskeletal remodeling also has key functions in disease resistance and abiotic stress responses. Many stimuli result in altered activity of cytoskeleton-associatedproteins,microtubuleassociated proteins(MAPs) and actin-binding proteins(ABPs). MAPs and ABPs are the main players determining the spatiotemporally dynamic nature of the cytoskeleton, functioning in a sensory hub that decodes signals to modulate plant cytoskeletal behavior. Moreover, MAP and ABP activities and levels are precisely regulated during development and environmental responses, but our understanding of this process remains limited. In this review, we summarize the evidence linking multiple signaling pathways, MAP and ABP activities and levels, and cytoskeletal rearrangements in plant cells. We highlight advances in elucidating the multiple mechanisms that regulate MAP and ABP activities and levels, including calcium and calmodulin signaling, ROP GTPase activity, phospholipid signaling, and post-translational modifications.

关键词： calcium cytoskeleton-associated protein phospholipid plant cytoskeleton post-translational modification ROP

Studies on inner wall structure of tracheids in Taxus chinensis with resin casting method

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Chinese Science Bulletin 1999年第15期44卷 1379-1382页

作者： Jianhua Xu Yuxi Hu jinxing lin Chinese Acad Sci Inst Bot Beijing 100093 Peoples R China

The resin casting method has been applied to studying the inner wall structure of tracheids in normal and compression wood, Taxus chinensis in gymnosperm. Not only the structures which are visible by the conventional method, but also the three-dimensional structures of pits pair in intertracheids unvisualized by the normal way have been observed. Moreover, it is found that there exist many differences in the angle, trend and occurrence of helical thickenings and distribution of warty layers on the inner walls of tracheids in normal and compression wood.

关键词： resin casting method Taxus chinensis compression wood tracheid structure.

An Arabidopsis Class II Formin,AtFH19,Nucleates Actin Assembly,Binds to the Barbed End of Actin Filaments,and Antagonizes the Effect of AtFH1 on Actin Dynamics

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Journal of Integrative Plant Biology 2012年第10期54卷 800-813页

作者： Yiyan Zheng Haibo Xin jinxing lin Chun-Ming Liu Shanjin Huang Key Laboratory of Plant Molecular Physiology Institute of Botanythe Chinese Academy of SciencesBeijing 1%0093China University of Chinese Academy of Sciences Beijing 10049China Ornamental Horticulture and Landscape Architecture China Agricultural UniversityBeijing 100094China

Formin is a major protein responsible for regulating the nucleation of actin filaments, and as such, it permits the cell to control where and when to assemble actin arrays. It is encoded by a multigene family comprising 21 members in Arabidopsis thaliana. The Arabidopsis formins can be separated into two phylogenetically-distinct classes： there are 11 class I formins and 10 class II formins. Significant questions remain unanswered regarding the molecular mechanism of actin nucleation and elongation stimulated by each formin isovariant, and how the different isovariants coordinate to regulate actin dynamics in cells. Here, we characterize a class II formin, AtFH19, biochemically. We found that AtFH19 retains all general properties of the formin family, including nucleation and barbed end capping activity. It can also generate actin filaments from a pool of actin monomers bound to profilin. However, both the nucleation and barbed end capping activities of AtFH19 are less efficient compared to those of another well-characterized formin, AtFHI. Interestingly, AtFH19 FH1FH2 competes with AtFH1 FHIFH2 in binding actin filament barbed ends, and inhibits the effect of AtFH1 FHIFH2 on actin. We thus propose a mechanism in which two quantitatively different formins coordinate to regulate actin dynamics by competing for actin filament barbed ends.

关键词： Actin actin-binding proteins actin nucleation Arabidopsis cytoskeleton formin.

Single-Particle Tracking for the Quantification of Membrane Protein Dynamics in Living Plant Cells

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Molecular Plant 2018年第11期11卷 1315-1327页

作者： Yaning Cui Meng Yu Xiaomin Yao Jingjing Xing jinxing lin Xiaojuan Li Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing Forestry UniversityBeijing 100083China College of Biological Sciences &Biotechnology Beijing Forestry UniversityBeijing 100083China Institute of Plant Stress Biology State Key Laboratory of Cotton BiologyDepartment of BiologyHenan UniversityJinming StreetKaifeng 475001China

The plasma membrane is a sophisticated,organized,and highly heterogeneous structure that compartmentalizes cellular *** decipher the biological processes involving membrane proteins,it is necessary to analyze their spatiotemporal ***,it is difficult to directly assess the dynamics and interactions of biomolecules in living cells using traditional biochemical *** tracking (SPT)methods for imaging and tracking single particles conjugated with fluorescent probes offer an ideal approach to acquire valuable and complementary information about dynamic intracellular *** can be used to quantitatively monitor the diverse motions of individual particles in living *** also provides super-spatiotemporal resolution that allows early-stage or rapid response information to be obtained for a better understanding of molecular basis of associated signal transduction *** importantly,SPT can be used to detect the motion paths of individual biomolecules in vivo and in situ,thus unveiling the dynamic behavior of the biomolecules that support developmental processes in living *** this review,we give an overview of SPT methods,from image acquisition to the detection of single particles,as well as tracking and data *** also discuss recent applications of SPT methods in the field ofplant biology to reveal the complex biological functions of membrane proteins.

关键词： single-particle tracking dynamics stoichiometry dwell time colocalization