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International Symposium on Advanced control of industrial Processes (ADCONIP)

作者： Xinggao Liu Long Chen Yunqing Hu State Key Laboratory of Industrial Control Technology Institute of Industrial Control Department of Control Science & Engineering University of Zhejiang Hangzhou China

An effective dynamic optimization solution method based on the modified orthogonal collocation (mOC) and reduced successive quadratic programming (rSQP) is proposed, where the mOC is proposed to decrease the approximation error of the discrete optimal problem while traditional OC method converts the dynamic optimization problem to a regular but discrete nonlinear programming (NLP) problem, and the rSQP method is introduced to solve the resulting NLP problem in the reduced space of the independent variables. A classic benchmark of dynamic optimization problem is explored as demonstration, where the detailed comparative researches between the literature reports and the proposed method are carried out. The research results illustrate the efficiency of the proposed method.

关键词： Optimization Finite element methods Mathematical model Power system dynamics Dynamic programming Polynomials

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Recovering high dynamic range radiance maps from in vivo fluorescence molecular imaging

Recovering high dynamic range radiance maps from in vivo flu...

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2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce, AIMSEC 2011

作者： Song, Bofan Jin, Wei Jin, Qinhan Mu, Ying State Key Lab. of Industrial Control Technology Institute of Cyber-System and Control Zhejiang University Hang Zhou China

ISBN: (纸本)9781457705366

A recent development in molecular imaging is in vivo fluorescence molecular imaging with near-infrared light, which has extraordinary significance in early diagnosis of the disease. This paper presents a method of recovering high dynamic range radiance maps at in vivo fluorescence molecular imaging technology. Use differently exposed photographs to recover the response curve of the imaging process, with the known curve, can fuse a single, high dynamic range radiance map whose pixel values are proportional to the true fluorescence signal values in the scene. Will contribute to quilitative and quatitative analysis, offer better observation, and get information much more accurate and true. Have great significance for analysis and diagnosis. © 2011 IEEE.

关键词： Recovery

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Performance assessment of PID controller with time-variant disturbance dynamics

Performance assessment of PID controller with time-variant d...

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International Symposium on Advanced control of industrial Processes (ADCONIP)

作者： Mengfei Zhou Lei Xie Haitian Pan Shuqing Wang College of Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou China National Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control University of Zhejiang Hangzhou China

A method is proposed for performance assessment of PID control loops subject to time-varying disturbance dynamics, which is often observed in industrial processes. The proposed method optimizes overall performance of the processes and presents a PID tradeoff curve which provides a useful lower bound on the achievable performance of the PID controller in terms of both the most significant disturbance rejection and the representative disturbance rejection. One can choose an optional benchmark to assess the PID control performance according to the tradeoff curve. The developed performance assessment technique is illustrated by simulation and industrial examples.

关键词： Benchmark testing Process control Transfer functions Materials Petroleum Furnaces Transient analysis

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Output error method for identification of multiple-model process with transition

Output error method for identification of multiple-model pro...

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International Symposium on Advanced control of industrial Processes (ADCONIP)

作者： Yu Zhao Biao Huang Hongye Su Jian Chu University of Alberta Canada State Key Laboratory of Industrial Control Technology Institute of Cyber Systems and Control University of Zhejiang Hangzhou China Department of Chemical and Materials Engineering University of Alberta Edmonton AB Canada

This paper is concerned with the identification of multiple model process with transition using the output error (OE) method. Local multiple linear models with output error model structure are identified at fixed operating points first and then a global nonlinear model is approximated by interpolating the multiple linear models with exponential weighting functions. With all the obtained initial values of the system's parameters, nonlinear optimization strategy is implemented to find the optimal values of the parameters for both the local multiple models and their corresponding weighting functions. Finally a more accurate global model can be obtained. The effectiveness of the proposed approach is demonstrated through simulation examples.

关键词： Interpolation Spline Optimization Data models Coolants Numerical models Zinc

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Robust stabilization for networked control systems with nonlinear perturbation

Robust stabilization for networked control systems with nonl...

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作者： Gao, Jinfeng Zhao, Xinlong Bai, Jianjun Su, Hongye Institute of Automation Zhejiang Sci-Tech University Hangzhou 310018 China State Key Laboratory of Industrial Control Technology Zhejiang University Yuquan Campus Hangzhou 310027 China

ISBN: (纸本)9789881725592

This note discusses the problem of stabilization for a class of uncertain networked control systems(NCSs) with nonlinear perturbation. By introducing a new model of NCSs with parameter uncertainty, network-induced delay, nonlinearity and data packet dropout in the transmission, a strict linear matrix inequality (LMI) criterion is presented for robust stabilization the uncertain nonlinear NCSs based on the Lyapunov stability theory. The maximum upper bound of the allowable delay can be obtained by solving the convex optimization problem of the corresponding LMI. Numerical example is provided to demonstrate the applicability and feasibility of the proposed algorithm. © 2011 Chinese Assoc of Automati.

关键词： Networked control systems

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Growth of micro/nano-structured metal oxides on carbon fiber and construction of flexible devices

Growth of micro/nano-structured metal oxides on carbon fiber...

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2011 International Conference on Advanced Fibers and Polymer Materials, ICAFPM 2011

作者： Ma, Xingfa Liu, Sha Gu, Sihui Zheng, Jing He, Xiaochun Gao, Mingjun Zhang, Xintao Li, Guang School of Environmental and Material Engineering Center of Advanced Functional Materials Yantai University Yantai 264005 China State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China National Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Hangzhou 310027 China

ISBN: (纸本)9787122120199

Carbon fibers are attractive substrates to be used for designing flexible and weavable devices. In order to obtain some flexible chemical sensors or other nanodevices, surface treatment of carbon fiber was carried out with oxidation approach. Studies on preparation of some typical metal oxide or other inorganic functional film (such as, ZnO, NiO, CdS, et al) with different morphologies under hydrothermal reaction condition were examined. A series of characterizations were employed by scanning electron microscope (SEM), X-ray diffraction (XRD), photoluminescence spectra (PL), et al. Results indicated that the ZnO film with porosity was uniformly formed on the surface of carbon fibers, and the uniformities of other films will be improved further by adjusting synthesis conditions.

关键词： Carbon fibers

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Analysis and experiments for dual-rate beacon scheduling in ZigBee/IEEE 802.15.4

Analysis and experiments for dual-rate beacon scheduling in ...

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2011 IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2011

作者： Chen, Shantao Almeida, Luis Wang, Zhi State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Institute of Telecommunications DEEC - Faculty of Engineering University of Porto Rua Dr. Roberto Frias 4200-465 Porto Portugal

ISBN: (纸本)9781457702488

cyber-Physical Networked systems (CPNS) are systems that integrate a multitude of nodes that perform computations for the sake of interacting with, or controlling, a physical process. The network plays an important role in CPNS supporting the interactions among the distributed nodes that enable the collaborative work towards the application goals. Some systems, e.g., target tracking systems, require reconciling properties that are strongly influenced by the network in opposing directions. For example, it is important to maintain low energy consumption to prolong lifetime but it is also important to be reactive to event propagation for quick target detection. In the ZigBee/IEEE802.15.4 standards, the beacon-enabled mode can achieve low energy consumption by adopting low duty cycles but this causes reaction latency to events to degrade. In this paper, we carry out several experiments that validate the potential of the recently proposed dual-rate beacon scheduling method for ZigBee/IEEE802.15.4 sensor networks to accomplish a trade-off between low energy consumption and rapid events propagation. The experiments include both simulation with OPNET as well as a real test-bed built on CC2430-based nodes. The results show the impact of relevant configuration parameters and the superiority of the dual-rate beacon scheduling in providing low energy consumption and low latency in CPNS. © 2011 IEEE.

关键词： Energy utilization

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Corrigendum to “Application of titanium dioxide in arsenic removal from water: A review” [J. Hazard. Mater. 215–216 (2012) 1–16]

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Journal of Hazardous Materials 2012年 221-222卷 303-303页

作者： Xiaohong Guan Juanshan Du Xiaoguang Meng Yuankui Sun Bo Sun Qinghai Hu State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai PR China State Key Lab of Urban Water Resource and Environment Harbin Institute of Technology Harbin PR China Center for Environmental Systems Stevens Institute of Technology Hoboken NJ 07030 USA

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Bayesian statistical monitoring of complex semiconductor manufacturing batch processes

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IFAC Proceedings Volumes 2011年第1期44卷 14079-14084页

作者： Zhiqiang Ge Junhua Zheng Zhihuan Song Huaping Dai State Key Laboratory of Industrial Control Technology Institute of Industrial Process Control Zhejiang University Hangzhou 310027 Zhejiang China Zhejiang Titan Design & Engineering Co. LTD Hangzhou Zhejiang China

Abstract Most current batch process monitoring methods have been implemented under a single operation mode, thus the batch uncertainty is assumed to be caused by batch-to-batch variations. However, due to the change of market requirements, the batch operation mode should also be changed frequently, especially in the semiconductor manufacturing process. This paper proposes an efficient method for monitoring those batch processes. First, the data is partitioned into multiple clusters, which correspond to different operation modes. Second, a sub-statistical model is built for each operation mode. Then the Bayesian inference strategy is introduced for result combination in different operation modes. The monitoring performance of the proposed method is evaluated by a real semiconductor process application case study.

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The application and issuse of linear wireless sensor networks

The application and issuse of linear wireless sensor network...

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2011 International Conference on System Science, Engineering Design and Manufacturing Informatization, ICSEM 2011

作者： Wang, Zhengjie Zhao, Xiaoguang Qian, Xu College of Information and Electrical Engineering Shandong University of Science and Technology Qingdao China State Key Laboratory of Intelligent Control and Management of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Beijing China

ISBN: (纸本)9781457702471

Wireless sensor networks consist of a large number of sensor nodes that have low power and limited transmission range and can be used in various scenario. The nodes can be deployed in the long and narrow region, such as road, bridge, tunnel and pipeline, to get some interesting information. The linear topology of these network application is different other application and have special feature, such as multi-hop, long delay, long distance and low reliability. This paper introduces the concept of linear wireless sensor networks and discusses the classification of topology and key issue of this network. The application of the linear wireless sensor network, such as road, bridge, tunnel and pipeline is presented. The research challenges are discussed at last in this paper. © 2011 IEEE.

关键词： Topology

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