检索结果-内蒙古大学图书馆

第三十二届中国控制会议

作者： Yonghui Liu Yugang Niu Yuanyuan Zou Key Laboratory of Advanced Control and Optimization for Chemical Process(East China University of Science and Technology)Ministry of Education

ISBN: (纸本)9781479900305

This paper considers sliding mode control for a class of uncertain switched systems with state and input *** employing a weighted sum of the input matrix,a common sliding surface is designed and the corresponding sliding mode dynamics is *** guarantee the asymptotic stability of the sliding motion,a switching signal based on the min-projection strategy is ***,it is shown that the state trajectories can be driven onto the specified sliding surface despite the presence of state and input delay and external ***,a numerical example is given to demonstrate the effectiveness of the proposed method.

关键词： switched systems sliding mode control input delay multiple Lyapunov functions

来源：评论

学校读者我要写书评

暂无评论

Feed property identification of ethylene cracking based on improved fuzzy C-mean clustering algorithm

引用

Huagong Xuebao/CIESC Journal 2013年第12期64卷 4366-4372页

作者： Li, Jiawen Du, Wenli Li, Jinlong Qian, Feng Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai 200237 China

In ethylene cracking process, the changes of feed have many kinds, and due to its expensive feed analyzer, little industrial site equips with it, so online recognition of oil property is important to achieve cracking online optimization. As the traditional fuzzy C-means algorithm is based on the membership of the strike Euclidean distance, the algorithm contains only the mean center, bringing the unity of clustering results. To take full advantage of effective information of cracking feed, this paper proposes a fuzzy membership set method based on hybrid probabilistic model, namely through the establishment of Gaussian mixture model to achieve describing the probability distribution of clustering sample's affiliation, and use EM algorithm to estimate the model parameter's pole maximum likelihood. The algorithm can not only consider mean center of the sample, but also effectively use sample covariance and the weight coefficient information for mode discrimination. Finally, the simulation is based on classic IRIS data clustering and ethylene cracking feedstock identification, verifying the method described in this paper in the index of dunn and Xiebieni is better than fuzzy C-means clustering algorithm, showing that the method is effective. © All Rights Reserved.

关键词： Clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

Scheduling Method for Tire Building Based on Heuristic Algorithm

Scheduling Method for Tire Building Based on Heuristic Algor...

引用

第25届中国控制与决策会议

作者： Shengping Yu Diancai Yang Kehui Zhu Shaowen Lu Key Laboratory of Process Industry Automation of Ministry of Education Northeastern University Mesnac Co. Ltd National Tire Technology and Control Engineering Technology Research Center

ISBN: (纸本)9781467355339

There are more product specifications, great production and much equipment over the whole process of tire building. The actual complex scheduling problem of tire building is described in detail. To solve the complex multi-objective, large-scale production scheduling problem of tire building, a heuristic algorithm is proposed from the experience of the experts. The algorithm was tested by online data. Results show that the heuristic algorithm can quickly workout the optimal production scheduling of tire building, reduce the production cost, and improve productivity. The algorithm will lay the firm groundwork for application to production process in the future.

关键词： Tire Building Scheduling Heuristic Algorithm

来源：评论

学校读者我要写书评

暂无评论

Modeling and optimization for ethylene cracking furnace systems scheduling with consideration of changing feedstock

引用

Huagong Xuebao/CIESC Journal 2013年第12期64卷 4304-4312页

作者： Shang, Baopeng Du, Wenli Jin, Yangkun Qian, Feng Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai 200237 China

An ethylene plant employs multiple cracking furnaces in parallel to convert various hydrocarbon feedstocks to smaller hydrocarbon molecules. The continuous operational performance of cracking furnaces gradually decays because of coke formation in the reaction coils, which requires each furnace to be periodically shut down for decoking. Given multiple feeds and different cracking furnaces as well as various product prices and manufacturing costs, the operational scheduling for the entire furnace system should be optimized to achieve the best economic performance. In this paper, a new MINLP(mixed-integer nonlinear programming) model is developed to obtain cyclic scheduling strategies for cracking furnace systems. Compared to previous studies, the new model has more capabilities to address operation profitability of multiple feeds cracked in multiple furnaces. Meanwhile, solving the problem of the choice for the right time of changing feedstock in the process of cracking furnace, case studies demonstrate the efficacy of the developed methodology. © All Rights Reserved.

关键词： Feedstocks

来源：评论

学校读者我要写书评

暂无评论

Synchronization of Nonlinear Coupled Networks with Time-delay via Distributed Impulsive control

Synchronization of Nonlinear Coupled Networks with Time-dela...

引用

第三十二届中国控制会议

作者： ZHANG Hao FENG Gang YAN Huaicheng CHEN Qijun Department of Control Science and Engineering Tongji University Department of Mechanical & Biomedical Engineering City University of Hong Kong Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education School of Information Science and Engineering East China University of Science and Technology

ISBN: (纸本)9781479900305

In this paper,the synchronization of a nonlinear network with time-varying coupling delay is investigated via distributed impulsive *** objective is to design the distributed impulsive controller with minimum coupling strength such that the nonlinear network with coupling delay is globally exponentially *** sufficient conditions have been derived based on Lyapunov-Razumikhin method in terms of matrix *** example is presented to illustrate the effectiveness of the proposed control methods.

关键词： Global exponential synchronization Distributed impulsive control Time-varying delay Coupled network

来源：评论

学校读者我要写书评

暂无评论

A new silicon triaxial resonant micro-accelerometer

A new silicon triaxial resonant micro-accelerometer

引用

International Conference on Information Science, Electronics and Electrical Engineering (ISEEE)

作者： Bo Yang Bo Dai Hui Zhao Xiaojun Liu School of Instrument Science & Engineering Southeast University Ministry of Education Key laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Nanjing P. R. China College of Automation Nanjing University of Science and Technology School of Information and Control Nanjing University of Information Science&Technology Nanjing P. R. China

We present the design, fabrication, and testing of a new silicon triaxial resonant micro-accelerometer. It is characterized by a biaxial planar resonant micro-accelerometer and a vertical resonant micro-accelerometer based on electrostatic stiffness. The biaxial resonant micro-accelerometer, which is decoupled in two sensitive directions by four pairs of decoupling beams, senses the acceleration by two pairs of tuning fork resonators with an excellent linearity and uniformity. The vertical resonant micro-accelerometer, where the sensing movement of the accelerometer is decoupled with oscillation of the plane resonators, senses the acceleration by electrostatic stiffness. Six analog self-oscillation circuits and a digital frequency measurement circuit based on FPGA are designed to control the triaxial resonant micro-accelerometer. The standard three-mask Deep Dry Silicon on Glass (DDSOG) process is used for fabrication of the triaxial decoupled resonant micro-accelerometer. Experimental results demonstrate a mechanical sensitivity of 52.57Hz/g(x-axis), 51.64 Hz/g(y-axis) and 31.65 Hz/g(z-axis) and a bias stability of 0.294mg(x-axis), 0.278mg(y-axis) and 0.727mg(z-axis).

关键词： Accelerometers RLC circuits Electrostatics Frequency measurement Silicon Acceleration Resonant frequency

来源：评论

学校读者我要写书评

暂无评论

Outlet Temperature Correlation and Prediction of Transfer Line Exchanger in an Industrial Steam Ethylene Cracking process

引用

Chinese Journal of Chemical Engineering 2013年第4期21卷 388-394页

作者：金阳坤李进龙杜文莉王振雷钱锋 Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and Technology Shanghai 200237 China Institute of Automation East China University of Science and Technology Shanghai 200237 China

Predicting the best shutdown time of a steam ethylene cracking furnace in industrial practice remains a challenge due to the complex coking process. As well known, the shutdown time of a furnace is mainly determined by coking condition of the transfer line exchangers （TLE） when naphtha or other heavy hydrocarbon feedstocks are cracked. In practice, it is difficult to measure the coke thickness in TLE through experimental method in the complex industrial situation. However, the outlet temperature of TLE （TLEOT） can indirectly characterize the coking situation in TLE since the coke accumulation in TLE has great influence on TLEOT. Thus, the TLEOT could be a critical factor in deciding when to shut down the furnace to decoke. To predict the TLEOT, a paramewic model was proposed in this work, based on theoretical analysis, mathematic reduction, and parameters estimation. The feasibility of the proposed model was further checked through industrial data and good agreements between model prediction and industrial data with maximum deviation 2% were observed.

关键词： transfer line exchanger outlet temperature parametric model steam ethylene cracking

来源：评论

学校读者我要写书评

暂无评论

A delay-partitioning approach to stability analysis of discrete-time recurrent neural networks with randomly occurred nonlinearities

A delay-partitioning approach to stability analysis of discr...

引用

10th International Symposium on Neural Networks, ISNN 2013

作者： Duan, Jianmin Hu, Manfeng Yang, Yongqing School of Science Jiangnan University Wuxi 214122 China Key Laboratory of Advanced Process Control for Light Industry Jiangnan University Ministry of Education Wuxi 214122 China

ISBN: (纸本)9783642390647

This paper considers the problem of stability analysis for discrete-time recurrent neural networks with randomly occurred nonlinearities (RONs) and time-varying delay. By utilizing new Lyapunov-Krasovskii functions and delay-partitioning technique, the stability criteria are proposed in terms of linear matrix inequality (LMI). We have also shown that the conservatism of the conditions is a non-increasing function of the number of delay partitions. A numerical example is provided to demonstrate the effectiveness of the proposed approach. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Stability criteria

来源：评论

学校读者我要写书评

暂无评论

Shrinkage Common Spatial Pattern for Feature Extraction in Brain-Computer Interface

Shrinkage Common Spatial Pattern for Feature Extraction in B...

引用

2013年中国智能自动化学术会议

作者： Yu Zhang Jing Jin Bei Wang Xingyu Wang Key Laboratory for Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China University of Science and Technology

Common spatial pattern(CSP) has been one of the most popular methods for EEG feature extraction in brain-computer interface(BCI) application. Although the CSP usually provides good discriminant features for classification,it is also known to be sensitive to overfitting and *** study introduces a shrinkage technique to regularize estimation of the covariance matrices in the CSP and hence a novel shrinkage CSP(SCSP) method,which could effectively alleviate the effects of small training sample size and unbalanced data on classification. The proposed SCSP is validated on feature extraction of P300 that has been widely adopted for BCI *** accuracies are evaluated by using linear discriminant analysis(LDA) with experimental EEG data from seven *** results indicate that the proposed SCSP extracts more effective features that yield higher classification accuracy than that by the traditional CSP.

关键词： Brain-computer interface(BCI) Common spatial pattern(CSP) Electroencephalogram(EEG) P300 Shrinkage

来源：评论

学校读者我要写书评

暂无评论

Improved shuffled frog leaping algorithm for permutation flow shop scheduling

Improved shuffled frog leaping algorithm for permutation flo...

引用

2013 International Conference on Information and Communication technology for education (ICTE 2013)

作者： Zhenhao Xu Xiao Xu Xingsheng Gu Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology

This paper studies the scheduling problem in a permutation flow shop with the objective of makespan, which is known as one of major problems in the field of scheduling. In order to solving the corresponding model, an improved shuffled frog leaping algorithm(ISFLA) is put forward for this kind of scheduling problem. A new leaping rule based on the characteristic of the problem is devised to improve the performance of the ISFLA. And it can not only produce feasible solutions but also maintain the structure characteristic of the SFLA. Computational experiments on benchmark sets show that the proposed ISFLA is greatly effective to generate good solutions relative to the other two algorithms.

关键词： permutation flow shop SFLA new leaping rule

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：