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Passive Control for Uncertain Discrete Singular Bilinear Systems

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Passive Control for Uncertain Discrete Singular Bilinear Sys...

Further Analysis of the Function of AtBHLH29 in Regulating the Iron Uptake Process in Arabidopsis thaliana

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作者： zhang Xiu-hua zhang qing-ling School of Science Northeastern University

ISBN: (纸本)9781467355339

The passive control problem for a class of uncertain discrete singular bilinear systems is investigated. By means of generalized Lyapunov function and generalized Riccati inequality and linear matrix inequality, a sufficient condition is derived such that a prescribed discrete singular bilinear systems with time-delay is passive and its zero solution is asymptotically *** making use of the method of Norm-bounded, the bilinear items was manipulated ingeniously .Finally, an example is given to illustrate the validity of the obtained results.

关键词： uncertain bilinear singular passive robust

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Journal of Integrative Plant Biology 2006年第1期48卷 75-84页

作者： Juan zhang Hui-Fen Zhu Hui Liang Kun-Fan Liu Ai-Min zhang Hong-qing ling Dao-Wen Wang Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

Using T-DNA insertion and chemical mutants, two recent studies have shown that AtBHLH29, encoding a putative basic helix-loop-helix （BHLH） protein, is involved in regulating the iron uptake process in Arabidopsis thaliana. Herein, we report that RNA interference （RNAi） mutants can be used to reveal more accurately the genetic function of AtBHLH29. We compared the iron deficiency responses of seven RNAi strains that contained decreasing amounts of AtBHLH29transcripts. Under high iron conditions （50 μmol/L iron）, only in the most severe RNAi strains （R101, R111, and R119） was plant growth significantly retarded. However, these mutants could still survive and produce seeds. This suggests that the function of AtBHLH29 is beneficial, but not absolutely essential, to plant growth when iron supply is not limiting. Under low iron conditions （less than 10 μmol/L iron）, the Rlll and R119 strains died prematurely, demonstrating that AtBHLH29 is absolutely necessary for plant survival when iron supply is restricted. The transcription of AtBHLH29 was essential for the expression of AtFRO2 （encoding the ferric chelate reductase）. In contrast, the expression of AtlRT1 （encoding the high-affinity iron transporter） was not so strongly dependent upon the transcription of AtBHLH29. By transient expression, we found that the AtBHLH29-GUS fusion protein was targeted specifically to the nucleus in plant cells. Interestingly, the nuclear localization of AtBHLH29-GUS was abolished when the four consecutive arginine residues located in the basic region of the putative AtBHLH29 protein were replaced by alanine residues by mutagenesis. The implications of our findings on further studies of the mechanism underlying the function of AtBHLH29 are discussed.

关键词： Arabidopsis AtBHLH29 basic helix-loop-helix protein iron RNA interference.

Radiative Cooling Instability in Large Scale Line-shaped Laser Plasma

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Chinese Physics Letters 1997年第6期14卷 428-431页

作者： WU Yan-qing HAN Shen-sheng SHEN Bai-fei zhang ling-qing SONG Xiang-yang XU Zhi-zhan Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800

In the experiment of generating laser plasma in a line-focus system we found that the x-ray emission nonuniformity was increased rapidly after the pumping laser has been turned *** study indicates that radiative cooli... 详细信息

关键词： pumping laser nonuniformity

Passivity Control for Uncertain T-S Fuzzy Descriptor Systems

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自动化学报 2006年第5期32卷 674-679页

作者： ZHU Bao-Yan zhang qing-ling TONG Shao-Cheng Institute of Systems Science Northeastern University Shenyang 110004 College of Sciences Shenyang Jianzhu University Shenyang 110168 Department of Mathematics and Physics Liaoning Institute of Technology Jinzhou 121001

By means of matrix decomposition method a criterion is presented for the admissibility of T-S fuzzy descriptor system. Then, the problem of passivity control is studied for a kind of T-S fuzzy descriptor system with uncertain parameters, and sufficient conditions which make the closed-loop system admissible and strictly passive are obtained based on linear matrix inequality (LMI). The nonstrict LMIs restricted conditions which characterize the descriptor system are transformed into strict ones, so testing admissibility and passivity of the system can be finished simultaneously. The design scheme of state feedback controller is also obtained. Finally, a numerical example is given to show the validity and feasibility of the proposed approach.

关键词： Uncertain T-S fuzzy descriptor systems admissibility passivity linear matrix inequality (LMI)

Delay-dependent Robust Stabilization for Uncertain Singular Systems with Multiple Input Delays

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自动化学报 2009年第2期35卷 162-167页

作者： DU Zhao-Ping zhang qing-ling LIU Li-Li Institute of Systems Science Northeastern University Shenyang 110004 P. R. China Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 P. R. China

In this paper, the problem of delay-dependent robust stabilization is investigated for singular systems with multiple input delays and admissible uncertainties. First, an improved delay-dependent stabilization criterion for the nominal system is established in terms of linear matrix inequalities (LMIs). Then, based on this criterion, the problem is solved via state feedback controller, which guarantees that the resultant closed-loop system is regular, impulse free, and stable for all admissible uncertainties. Numerical examples are provided to illustrate the effectiveness of the proposed method.

关键词：物流管理信息系统自动化系统线性矩阵不等式反馈控制器

Delay-dependent Stability Criteria for Singular Time-delay Systems

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自动化学报 2010年第3期36卷 433-437页

作者： FENG Yi-Fu ZHU Xun-Lin zhang qing-ling Institute of Systems Science Northeastern University Shenyang 110004 P.R. China Jilin Normal University Siping 136000 P.R. China School of Computer and Communication Engineering Zhengzhou University of Light Industry Zhengzhou 450002 P.R. China Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 P.R. China

This note studies the problem of singular timedelay systems. At first,a simplified stability criterion is derived after establishing equivalence among several recently proposed stability criteria. By using a delay decomposition method,a new stability criterion, which is much less conservative than the existing ones,is presented. A numerical example is given to illustrate the effectiveness and less conservatism of the new proposed stability criterion

关键词：延迟分解法稳定性自动化系统时滞

Endoscopic Mucosal Resection of Mucosal Neoplasm Located on the Duodenal Bulb through Endoscope Retroflexion

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Clinical oncology and cancer researeh 2010年第5期7卷 289-293页

作者： Hua LI Qiang LI Jian-zhang HU Guo-qing zhang Feng-ling LI Department of Endoscopy 2 Department ofHepatobiliary Surgery Tianjin Medical University Cancer institute & Hospital Tianjin 300060China.

OBJECTIVE To assess the results of endoscopic mucosal resection （EMR） of benign mucosal neoplasms located on the duodenal bulb using endoscope retroflexion. METHODS This study involved 14 patients with 16 mucosal neoplasms located on the duodenal bulb. The diameter of each neoplasm was less than 15 mm. After endoscope retroflexion within the duodenum for evaluation of the size, extent and depth of the tumor, EMR was attempted with endoscope retroflexion for removing the lesion in the duodenal bulb. The rate of endoscope retroflexion, the time required for endoscope retroflexion, median operation time, curative resection rate, en bloc resection rate, complication, and median follow-up period were evaluated. RESULTS Sixteen lesions in 14 patents （median age of 56 years, 5 female, 9 male） were removed through EMR. The mean size of the lesions resected was 6.9 mm （median size of 5.5 mm, range of 3-15 mm）. Post-EMR histologic examination revealed Brunner＇s gland hyperplasia in 6, gastric mucosal metaplasia in 5, adenoma in 1, chronic inflammation in 3, and benign lymphocytic hyperplasia in 1. The curative resection rate was 100% （16/16）, and the en bloc resection rate was 94% （15/16）, with EMR. One of the lesions was piecemeal removed through EMR for its large size （15 mm） and for its involving the area from the duodenal bulb to the pyloric ring. The success rate of endoscope retroflexion within the duodenum was 94% （15/16）. The time required for endoscope retroflexion was longer for the first 10 lesions （median time of 2 min, range of 1-2.5 min） than that for the last 5 lesions （median time of 1.5 min, range of 1-2 min）. The median follow-up period was 22 months （range of 4-48 months）. During the follow-up, no residual, no pyloric or duodenal stenosis was found in any of the patients after EMR. There was no severe hemorrhage, or perforations occurring. CONCLUSION EMR of mucosal neoplasm located on the duodenal bulb through endoscope retroflexion, which is a feasible and

关键词： endoscopic mucosal resection mucosal neoplasm duodenal bulb endoscope retroflexion.

Robust Impulse Dissipative Control of Singular Systems with Uncertainties

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自动化学报 2007年第5期33卷 554-556页

作者： YANG Li zhang qing-ling LIU Guo-Yi LIU Pei-Yong Instittite of Systems Science Northeastern University Shenyang 110004 P.R. China Mathematics Department Liaoning University Shenyang 110036 P. R. China Biotechnology Institute Northeastern University Shenyang 110004 P. R. China

把方法基于线性矩阵不平等( LMI )，这份报纸讨论推动为有在对的描述下面的无常的单个系统的一个班的消散的问题州空间，并且获得柔韧的推动为有由解决线性矩阵不平等的许可的无常的单个系统的消散的州的反馈控制器和产量反馈控制器。... 详细信息

把方法基于线性矩阵不平等( LMI )，这份报纸讨论推动为有在对的描述下面的无常的单个系统的一个班的消散的问题州空间，并且获得柔韧的推动为有由解决线性矩阵不平等的许可的无常的单个系统的消散的州的反馈控制器和产量反馈控制器。最后，我们由一个数字例子证明我们的结果的可行性。

关键词：不确定系统单参数系统鲁棒控制线性矩阵不等式耗散控制

Delay-dependent Stability Analysis and Stabilization of Discrete-time Singular Delay Systems

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自动化学报 2010年第10期36卷 1477-1483页

作者： SUN Xin zhang qing-ling YANG Chun-Yu SHAO Yong-Yun SU Zhan Institute of Systems Science Northeastern University Shenyang 110004 P. R. China Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 P. R. China Department of Computer and Mathematics Teaching Shenyang Normal University Shenyang 110034 P. R. China Transportation Management College Dalian Maritime University Dalian 116026 P. R. China

In this paper, delay-dependent stability analysis and stabilization of discrete-time singular delay systems are addressed, respectively. First, a new delay-dependent sufficient condition of admissibility for discrete-time singular delay systems is derived. The proposed method is proved to have some advantages over the existing results. Then, by applying the skill of matrix theory, a state feedback controller is designed to guarantee the closed-loop discrete-time singular delay systems to be admissible. Finally, two numerical examples are given to demonstrate the effectiveness of the proposed method

关键词：自动化系统稳定性方法实验