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： Wang Ling Wu LuLu School of Automation & Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process(Ministry of Education)

ISBN: (纸本)9781479900305

This paper proposes a new incremental learning method based on weighted constraints support vector regression, called ***,a modified nearest neighbor clustering method is used to partition the whole input space into several ***,according to the distance distinguish condition,all the samples in sub-cluster are identified to form the candidate support vector *** each new sample added,it was clustered to an individual candidate support vector subset where the cluster center is the closest to the new ***,in the WCSVR learning process,the object function is modified by introducing a weight for each new sample and the corresponding regularization *** experiment shows prominence of our proposed incremental method in comparison with the standard SVR.

关键词： incremental learning support vector regression weighted constraint kernel Mahalanobis distance

来源：评论

学校读者我要写书评

暂无评论

Modeling and design of networked control systems based on reduced dimension observers

Modeling and design of networked control systems based on re...

引用

2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

作者： Liu, Lei-Ming Tong, Chao-Nan School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education Beijing China

ISBN: (纸本)9780769550114

The model of NCS (Networked control Systems) with reduced dimension observer is presented when the network-induced random time-varying delays are bounded and the upper bound of which is longer than one sampling period. Thus we established a discrete-time jump system model with Markov delay. Based on this, this paper gave also design method of stabilizing controllers by the optimization method. This paper generalizes previous results on delay-less reduced dimension observer systems. Theoretical analysis and simulation on a cart and inverted pendulum with random time delay show that feedback control Based on reduced dimension observer can make the system stable. © 2013 IEEE.

关键词： Networked control systems

来源：评论

学校读者我要写书评

暂无评论

Group Synchronization of Complex Networks with Nonlinear Dynamics via Pinning control

Group Synchronization of Complex Networks with Nonlinear Dyn...

引用

第三十二届中国控制会议

作者： LIU Bo WEI Pengfei WANG Xiaoling FENG Hongke ZOU Jietao YU Junyan ZUO Zhiqiang College of Science North China University of Technology School of Mathematical Sciences University of Electronic Science and Technology of China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781479900305

This paper has proposed a new group synchronization protocol for nonlinear dynamical complex networks whose information interaction exists among different groups via pinning control *** constructing an effective Lyapunov function,we have proved that all nodes in each group can converge to its own synchronous state ***,some simulations are presented to illustrate our theoretical results.

关键词： Group Synchronization Pinning control Complex Networks.

来源：评论

学校读者我要写书评

暂无评论

Field characteristic of two-phase flow measurement based on long waist cone and conductance sensor fusion

引用

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) 2013年第SUPPL.1期44卷 415-419页

作者： Ji, Pengcheng Tan, Chao Dong, Feng Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

According to the difficulties measuring two-phase flow process multi-parameter with single sensor, a gas-water of two-phase flow process parameters (flow rate and phase fraction) multi-sensor measuring system was presented, which combines a new long waist cone differential pressure sensor and conductance ring sensor. The computational fluid mechanics and multi-physics field coupling analysis were used to simulate the flow field and electric field of long waist cone conductance ring sensor in horizontal pipe (DN50 mm), which provided the accurate theoretical basis for the later study about coupling simulation of the electric field and fluid field.

关键词： Two phase flow

来源：评论

学校读者我要写书评

暂无评论

Switching Tracking control for Planar Systems with Transient Performance Constraints

引用

自动化学报 2013年第6期39卷 919-925页

作者： SU Qing-Yu SUN Xi-Ming ZHAO Jun State Key .Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang 110819 China School of Control Science and Engineering Dalian University ofTechnology Dalian 116024 China

这份报纸学习与被 overshoot 和安定时间决定的一些给定的短暂性能限制为平面系统的一个类追踪问题的输出。与产量限制(SSOFTOC ) 追踪的交换静态的产量反馈的问题第一次被建议并且解决。静态的输出反馈控制器和一条所谓的圆锥形的切换... 详细信息

这份报纸学习与被 overshoot 和安定时间决定的一些给定的短暂性能限制为平面系统的一个类追踪问题的输出。与产量限制(SSOFTOC ) 追踪的交换静态的产量反馈的问题第一次被建议并且解决。静态的输出反馈控制器和一条所谓的圆锥形的切换法律在没有违背短暂性能限制，靠近环的交换系统的输出能 asymptotically 在哪个下面追踪步信号下面被设计。而且，最佳的加权的短暂表演被解决一个非线性的编程问题获得。最后，到飞机扇涡轮引擎的一个数字例子和应用被给说明有效性和建议方法的适用性。

关键词：瞬态性能跟踪控制性能约束平面系统静态输出反馈输出反馈控制器非线性规划问题开关

来源：评论

学校读者我要写书评

暂无评论

Setpoints Compensation in Industrial processes via Multirate Output Feedback control

Setpoints Compensation in Industrial Processes via Multirate...

引用

9th Asian control Conference (ASCC)

作者： Yin, Shen Liu, Fangzhou Gao, Huijun Qiu, Jianbin Chai, Tianyou Fan, Jialu Karimi, Hamid Reza Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150080 China State Key Laboratory for Synthetical Automation of Process Industries Northeastern University Shenyang 110004 China Department of Engineering University of Agder Grimstad N-4898 Norway

ISBN: (纸本)9781467357692;9781467357678

This paper investigates the setpoints compensation for a class of complex industrial processes. Plants at the device layer are controlled by the local regulation controllers, and a multirate output feedback control approach for setpoint compensation is proposed such that the subsystems can reach the dynamically changed setpoints and the given economic objective can also be tracked via certain economic performance index (EPI). First, a sampled-data multivariable direct output feedback proportional integral (PI) controller is designed to regulate the performance of the subsystems. Second, the outputs and control inputs of the plants at the device layer are sampled at operation layer sampling time to form an EPI. Thus the multirate problem is solved by a lifting method. Third, static setpoints are generated by real time optimization (RTO) and the dynamic setpoints are calculated by the compensator according to the error between the EPI and objective at each operation layer step. Finally, a rougher flotation process model is employed to demonstrate the effectiveness of the proposed method.

关键词： PI control compensation complex networks control system synthesis feedback multivariable control systems optimisation process control sampled data systems

来源：评论

学校读者我要写书评

暂无评论

An Improved Total Variation Regularization Method for Electrical Resistance Tomography

An Improved Total Variation Regularization Method for Electr...

引用

2013年中国智能自动化学术会议

作者： Xizi Song Yanbin Xu Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

Electrical resistance tomography（ERT） attempts to image the conductivity distribution of an object by measuring the voltage on its boundary. The reconstruction of ERT is an ill-posed inverse problem,and little noise in the measured data can cause large errors in the estimated *** this paper, an improved TV regularization method for ERT is introduced with iterations updated by the projected Gauss-Newton *** replaces the conventional TV regularization penalty term（?）|▽g|dΩby（?）|▽g|dΩ,in which p is selected as 1.5. The choice of such a penalty compromises both the conventional smoothness and discontinuities of the imaged *** improved approach can reconstruct images with sharp edges as well as reducing the suffering of the staircase effect. Simulation and experimental results of the improved method,TV regularization and Tikhonov regularization are compared,which show that this improved TV regularization can endure a relatively high level of noise in the measured voltages.

关键词： Electrical resistance tomography(ERT) Image reconstruction Tikhonov regularization Total variation regularization

来源：评论

学校读者我要写书评

暂无评论

Distinction of Breast Tissues Based on Segmented Integral Area of Frequency-Resistance Curves

Distinction of Breast Tissues Based on Segmented Integral Ar...

引用

2013年中国智能自动化学术会议

作者： Chao Wang Yiming Wei Ruifeng Bai Tianjin Key laboratory of process Measurement and Control School of Electrical Engineering and AutomationTianjin University

Breast cancer seriously endangers the health of women,which makes intra-operative assessment of cancer focus have vital *** information of bioelectrical impedance has unique ability to distinguish cancerous and normal tissue,and can provide basis for intra-operative assessment of cancer *** order to achieve accurate measurement,a measurement system is established composed of the impedance analyzer and probe with optimized *** integral area is regarded as characteristic parameter to reflect the over all *** utilize the advantages of different frequency-resistance curves,BP neural network is finally selected and good-training neural networks are integrated to make the final *** result indicates that the characteristic parameter selected can reflect differences of tissues and the integrated BP neural network has better performance than single neural network.

关键词： Breast cancer Biological impedance measurement technology(BIMT) Characteristic parameter BP neural network Frequency-resistance curves

来源：评论

学校读者我要写书评

暂无评论

Numerical Simulation and Experimental Study of the Vortex Flow Around a Bluff Body in Horizontal Gas-liquid Two-phase Flow

Numerical Simulation and Experimental Study of the Vortex Fl...

引用

International Instrumentation and Measurement Technology Conference

作者： Hongjun Sun Jinxia Li Chao Wang Yong Yan Yonghui Hu Tianjin Key Laboratory of Process Measurement & Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China School of Engineering and Digital Arts University of Kent Canterbury Kent CT2 7NT UK School of Control and Computer Engineering North China Electric Power University Beijing 102206 China

ISBN: (纸本)9781467363846

Numerical simulation and experimental tests were undertaken to study the vortex stability of gas-liquid two-phase flow around a bluff body in a horizontal pipe. A 3-D Computational Fluid Dynamics (CFD) modeling is carried out in order to model the gas-liquid two-phase flow around a bluff body using a volume of fluid (VOF) model. The captured photographs of typical flow patterns are used to compare the CFD predictions and a good qualitative agreement is observed between them. The relationship between the Strouhal number and cross-sectional void fraction is derived from the experimental data. The vortex stability is analyzed in terms of frequency, Strouhal number and the requirement of vortex stability.

关键词： gas-liquid two-phase flow bluff body CFD VOF Stability

来源：评论

学校读者我要写书评

暂无评论

Two-phase flow measurement based on Kalman centralized fusion estimation

Two-phase flow measurement based on Kalman centralized fusio...

引用

Chinese control Conference (CCC)

作者： Feng Li Feng Dong Chao Tan Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University China

Due to the complexity of the multiphase flow process and the limitation of traditional single sensor, the existing measurement methods can not meet the requirement of accurate measurement for industrial processes. In order to solve the problem of accurate and comprehensive information acquisition of the multiphase flow process, a multi-sensor fusion method is proposed for multiphase flow parameter measurement. A conductance-ring sensor and a cone-shape differential pressure sensor are selected as the means of measurement. The cross-correlation velocity measurement technology is combined with the measurement model of differential pressures. Kalman centralized fusion estimation method not only can realize the effective information fusion between heterogeneous sensors, but also can satisfy accurate and real-time requirements of the multiphase flow parameters estimation. The experiment results have verified the feasibility of the method.

关键词： Fluid flow measurement Kalman filters Electric variables measurement Estimation process control Liquids Electronic mail

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：