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Journal of Systems Engineering and Electronics 2007年第1期18卷 111-119页

作者： Wo Songlin Shi Guodong zou yun Division of Public Teaching Changzhou Coll. of Information Technology Changzhou 213164 P. R. China Dept. of Automation Nanjing Univ. of Science and Technology Nanjing 210094 P. R. China

The decentralized robust guaranteed cost control problem is studied for a class of interconnected singular large-scale systems with time-delay and norm-bounded time-invariant parameter uncertainty under a given quadratic cost performance function. The problem that is addressed in this study is to design a decentralized robust guaranteed cost state feedback controller such that the closed-loop system is not only regular, impulse-free and stable, but also guarantees an adequate level of performance for all admissible uncertainties. A sufficient condition for the existence of the decentralized robust guaranteed cost state feedback controllers is proposed in terms of a linear matrix inequality （LMI） via LMI approach. When this condition is feasible, the desired state feedback decentralized robust guaranteed cost controller gain matrices can be obtained. Finally, an illustrative example is provided to demonstrate the effectiveness of the proposed approach.

关键词： Uncertain singular large-scale systems Time-delay system Guaranteed cost control LMI

On the impact of connected automated vehicles in freeway work zones:a cooperative cellular automata model based approach

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Journal of Intelligent and Connected Vehicles 2018年第1期1卷 1-14页

作者： yun zou Xiaobo Qu School of Civil and Environmental Engineering Faculty of Engineering and Information TechnologyUniversity of Technology SydneySydneyAustralia Department of Architecture and Civil Engineering Chalmers University of TechnologyGothenburgSweden

Purpose–Freeway work zones have been traffic bottlenecks that lead to a series of problems,including long travel time,high-speed variation,driver’s dissatisfaction and traffic *** research aims to develop a collaborative component of connected and automated vehicles(CAVs)to alleviate negative effects caused by work ***/methodology/approach–The proposed cooperative component is incorporated in a cellular automata model to examine how and to what scale CAVs can help in improving traffic ***–Simulation results show that,with the proposed component and penetration of CAVs,the average performances(travel time,safety and emission)can all be improved and the stochasticity of performances will be minimized ***/value–To the best of the authors’knowledge,this is the first research that develops a cooperative mechanism of CAVs to improve work zone performance.

关键词： Connected and automated vehicles Cooperative cellular automata model Microscopic traffic flow models Work zone

PD-based trajectory tracking control in automatic cell injection system

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控制理论与应用（英文版） 2013年第2期11卷 207-214页

作者： Wenkang XU Chenxiao CAI yun zou School of Automation Nanjing University of Science and Technology

Trajectory tracking technology has been the focus of industrial manipulatory applications for many years, and its research has been found in micromanipulation in bioengineering recently. In this paper, a hybrid vision and force control method is applied to the automatic cell injection. The three-dimensional cell injection process involves the trajectory tracking in free space and the force control in contact space. A PD plus feedforward compensation control method is applied to the trajectory tracking in 3D space. Further, a PD-based robust controller is introduced into trajectory tracking while the systemic uncertainty of the cell injection is additionally considered. Both of the two control methods are theoretically proved to be exponential convergent. Finally, the effectiveness of the proposed method is verified as compared with other control methods by its application to trajectory tracking problem.

关键词： Cell injection Trajectory tracking PD-based robust control

Lower Exciton Number Strong Light Matter Interaction in Plasmonic Tweezers

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Chinese Physics Letters 2021年第2期38卷 18-21页

作者： yun-Fei zou Li Yu School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

The plasmonic nanocavity is an excellent platform for the study of light matter interaction within a sub-diffraction volume under ambient *** design a structure of plasmonic tweezers,which can trap molecular Jaggregates and also serve as a plasmonic cavity with which to investigate strong light matter *** optical response of the cavity is calculated via finite-difference time-domain methods,and the optical force is evaluated based on the Maxwell stress tensor *** the help of the coupled oscillator model and virtual exciton theory,we investigate the strong coupling progress at the lower level of excitons,finding that a Rabi splitting of 230 meV can be obtained in a single exciton *** further analyze the relationship between optical force and model volume in the coupling *** proposed method offers a way to locate molecular J-aggregates in plasmonic tweezers for investigating optical force performance and strong light matter interaction.

关键词： interaction. method. coupling

Enhanced circular dichroism of plasmonic system in the strong coupling regime

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Chinese Physics B 2021年第4期30卷 492-496页

The circular dichroism(CD) signal of a molecule is usually weak,however,a strong CD signal in optical spectrum is desirable because of its wide range of applications in biosensing,chiral photo detection,and chiral *** this work,we show that a strong chiral response can be obtained in a hybridized system consisting of an artificial chiral molecule and a nanorod in the strong coupling *** artificial chiral molecule is composed of six quantum dots in a helix assembly,and its CD signal arises from internal Coulomb interactions between quantum *** CD signal of the hybridized system is highly dependent on the Coulomb interactions and the strong coupling progress through the electromagnetic *** use the coupled oscillator model to analyze strong coupling phenomenon and address that the strong coupling progress can amplify the CD *** work provides a scenario for designing new plasmonic nanostructures with a strong chiral optical response.

关键词： plasmonic chirality strong coupling circular dichroism

Two new upper bounds of the solution for the continuous algebraic Riccati equation and their application

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Science China(Information Sciences) 2015年第5期58卷 156-167页

作者： XIA YaPing CAI ChenXiao YIN MingHui zou yun School of Automation Nanjing University of Science and Technology

In this paper, for the solution of the continuous algebraic Riccati equation(CARE), we derived two new upper matrix bounds. Compared with the existing results, the newly obtained bounds are less conservative and more practical, which means that the condition for the existence of the upper bounds derived here is much weaker. The advantage of the results is shown by theoretical analysis and numerical examples. Moreover, in redundant optimal control, when we increase the columns of the input matrix, some sufficient conditions are presented to strictly decrease the largest singular value of the feedback matrix by utilizing these upper *** also give some examples to illustrate the effectiveness of these sufficient conditions.

关键词： upper matrix bound continuous algebraic Riccati equation optimal control redundant control largest singular value

The Effects of Redundant Control Inputs in Finite-Time Optimal Control

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Journal of Systems Science & Complexity 2016年第6期29卷 1553-1564页

作者： XIA Yaping CAI Chenxiao YIN Minghui zou yun School of Automation Nanjing University of Science and Technology

This paper is concerned with the effects of redundant control inputs on the quadratic optimal performance index in finite-time optimal ***,the effects of redundant control input on quadratic performance index is equal to study the effects of the redundant control input on the solution of Riccati differential equation(RDE).Hence,some sufficient conditions are presented to strictly decrease the solution of RDE with the column of input matrix ***,a necessary and sufficient condition is derived to strictly decrease the solution of the homogeneous RDE after control input ***,one sufficient condition is obtained,which guarantees that the minimum control energy index strictly decreases with input *** is shown that redundant control inputs can improve the system performance based on these *** examples are taken to illustrate the effectiveness of related problems.

关键词： Optimal control quadratic performance index RDE redundant control.

Optofluidic microring dye laser embedded in polydimenthylsiloxane with reduced threshold

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Science China Technological Sciences 2013年第3期56卷 594-597页

作者： SHEN ZhenHua zou yun CHEN XianFeng Department of Physics State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong University

We demonstrate an integrated optofluidic microring dye laser with a relatively low threshold on a polydimenthylsiloxane(PDMS) *** chip was fabricated through conventional soft *** consists of a liquid waveguide with microring structure providing the feedback.A reduced threshold is realized due to the unique design of the bus waveguide across the center of the microring structure,which results in a great reduction in the cavity *** dye rhodamine 6G(R6G) dissolved in benzyl alcohol was injected into the microfluidic channel as the gain *** the dye laser was pumped with a pulsed laser at 532 nm,the dye laser oscillation was achieved with a threshold of only 4?5 μJ *** convenience in fabrication and operation makes the optofluidic microring dye laser a promising underlying photonic component in the integrated optofluidic systems.

关键词： optofluidics optofluidic microring dye laser integrated optofluidic systems

Optimal Decreased Torque Gain Control for Maximizing Wind Energy Extraction Under Varying Wind Speed

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Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 853-862页

作者： Liansong Guo Minghui Yin Chenxiao Cai yunyun Xie yun zou School of Automation Nanjing University of Science and TechnologyNanjing 210094China

Optimal torque(OT)control is a widely used method for maximum power point tracking(MPPT)due to its *** order to overcome the adverse impacts of turbulent wind speed variations on MPPT,in several methods,modification factors have been proposed to dynamically modify the ideal power curve for OT ***,this paper finds that the update cycles used in existing methods to adjust power curve modification factors are very long and hence these factors are difficult to be updated in a timely manner along with the wind speed *** thereby may deteriorate the effectiveness of wind energy ***,an optimal decreased torque gain(DTG)control method is proposed in this *** on the persistence method,an offline mapping from the wind speed and rotor speed to optimal modification factors is established via optimal control *** power curve can be periodically modified online through the mapping *** this method,the update cycles for these power curve modification factors are shortened from tens of minutes to *** simulations and experiments show that the proposed method is more efficient than others in terms of energy extraction under varying wind speeds,especially for turbulent wind cases.

关键词： Decreased torque gain(DTG) maximum power point tracking(MPPT) offline mapping optimal control persistence method

Joining actions: crosstalk between intermediate filaments and actin orchestrates cellular physical dynamics and signaling

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Science China(Life Sciences) 2019年第10期62卷 1368-1374页

作者： Jian Li yun zou Zhifang Li Yaming Jiu CAS Key Laboratory of Molecular Virology and Immunology Institut Pasteur of ShanghaiChinese Academy of Sciences Shanghai 200031China University of Chinese Academy of Sciences Beijing 100049China

Many key cellular functions are regulated by the interplay of three distinct cytoskeletal networks, made of actin filaments,microtubules, and intermediate filaments(IFs), which is a hitherto poorly investigated area of research. However, there are growing evidence in the last few years showing that the IFs cooperate with actin filaments to exhibit strongly coupled *** review recapitulates our current knowledge on how the crosstalk between IFs and actin filaments modulates the migration properties, mechano-responsiveness and signaling transduction of cells, from both biophysical and biochemical point of view.

关键词： intermediate filaments actin cytoskeletal interaction cell migration signaling pathway cell mechanosensing