检索结果-内蒙古大学图书馆

Chinese control Conference (CCC)

作者： Yonghui Liu Yugang Niu Daniel W. C. Ho Key Laboratory of Advanced Control and Optimization for Chemical Process Ministry of Education East China University of Science and Technology Shanghai China Department of Mathematics City University of Hong Kong Kowloon Hong Kong China

ISBN: (纸本)9781467325813

This paper considers the problem of sliding mode control (SMC) for a class of linear uncertain switched systems. In the controlled systems, it is not required that each subsystem model shares the same input channel, which is usually assumed in some existing works. By means of a transformation on input matrices, a single integral sliding surface is designed and the switching signals depending on the average dwell time are given. It is shown that the designed sliding mode controller can guarantee the reachability of the sliding surface. Moreover, the sliding motion on the specified integral sliding surface is exponentially stable under the designed switching signal. The efficiency of the proposed method is demonstrated by a simulation.

关键词： Switches Switched systems Stability analysis Sliding mode control Power system stability Linear systems

来源：评论

学校读者我要写书评

暂无评论

Improvements on Anhydrous Ethanol Production by Extractive Distillation using Ionic Liquid as Solvent

引用

Procedia Engineering 2012年 42卷 1016-1026页

作者： J.J. Figueroa B. Hoss Lunelli R. Maciel Filho M.R. Wolf Maciel State University of Campinas School of Chemical Engineering Laboratory of Optimization Design and Advanced Control Av. Albert Einstein 500 Cidade Universitária “Zeferino Vaz” Campinas-SP CEP 13083-852 Brazi

Biorefineries use a variety of separation methods in order to produce high value co-products from different feed streams. The ionic liquids (IL) represent new classes of non-volatile selective solvents with large solubility, low solution viscosities, low toxicity. In this work, a computational study on extractive distillation using ionic liquids aiming to improve the properties of separation and lower energy consumption compared to conventional extraction agents, showing significant potential for this application, was developed. The ternary vapor liquid equilibrium data were taken from literature and the process was modeled and simulated using Aspen Plus TM process simulation environment. Computed results showed that 1-Butyl-3-methylimidazolium methyl sulfate ([emim][mSO4]) consumes lesser energy per kilogram of anhydrous ethanol, obtaining an ethanol purity of 0.995 (in mass) and an ethanol percentage recovery of 99.9 wt%.

关键词： Biofuels ionic liquids azeotrope extractive distillation

来源：评论

学校读者我要写书评

暂无评论

A particle filter based on a constrained sampling method for state estimation

A particle filter based on a constrained sampling method for...

引用

15th International Conference on Information Fusion, FUSION 2012

作者： Zhao, Zhonggai Huang, Biao Liu, Fei Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University Wuxi 214122 China Department of Chemical and Materials Engineering University of Alberta Edmonton AB T6G 2G6 Canada

ISBN: (纸本)9780982443859

Increasingly in practical applications, nonlinearity, non-Gaussianity, and constraint are considered when dealing with state estimation problems. This paper proposes a novel constrained particle filter (PF) approach for state estimation, where three constraint strategies are implemented: First, to ensure the validity of prior, prior particles are restrictedly sampled in the constraint region by a constrained inverse transform sampling method. Second, if constraints are imposed on the posterior, a constrained re-sampling method, similar to the existing acceptance/rejection constrained PF method, is proposed to restrict the posterior particles to be generated from the valid prior particles. Third, the validity of state estimation is ensured through adjustment of part of posterior particles according to the posterior density function of states, which is accomplished by deleting uniformly selected violated posterior particle and uniformly selected valid posterior particle for reproduction. Compared with the existing methods, the proposed method implements constraints with better physical interpretation, and involves no numerical optimization procedure and no restrictive assumptions about the distributions. Simulation results demonstrate its effectiveness. © 2012 ISIF (Intl Society of Information Fusi).

关键词： State estimation

来源：评论

学校读者我要写书评

暂无评论

On-Line Batch Process Monitoring Using Multiway Kernel Partial Least Squares

引用

Journal of Donghua University(English Edition) 2011年第6期28卷 585-590页

作者：胡益马贺贺侍洪波 Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China University of Science and Technology

An approach for batch processes monitoring and fault detection based on multiway kernel partial least squares(MKPLS) was *** is known that conventional batch process monitoring methods,such as multiway partial least squares(MPLS),are not suitable due to their intrinsic linearity when the variations are *** address this issue,kernel partial least squares(KPLS) was used to capture the nonlinear relationship between the latent structures and predictive *** addition,KPLS requires only linear algebra and does not involve any nonlinear *** this paper,the application of KPLS was extended to on-line monitoring of batch *** proposed batch monitoring method was applied to a simulation benchmark of fed-batch penicillin fermentation *** the results demonstrate the superior monitoring performance of MKPLS in comparison to MPLS monitoring.

关键词： process monitoring fault detection kernel partial least squares(KPLS) nonlinear process multiway kernel partial least squares(MKPLS)

来源：评论

学校读者我要写书评

暂无评论

Classification of four-class motor imagery EEG based on CSP-HMM

引用

Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology 2012年第SUPPL.2期36卷 197-201页

作者： Wang, Dong-Yang Jin, Jing Wang, Xing-Yu Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and Technology Shanghai 200237 China

In this paper, a new classification method based on common spatial pattern (CSP) and hidden markov model(HMM)is presented to classify the EEG of four-class motor imagery. 4 s data of motor imagery is selected and four 2 s sub-data sets are obtained by sliding time window with 0.5 s step size. CSP is used to extract features from the four sub-data sets respectively. Features from each class are used to train one HMM. Four different HMMs are obtained corresponding with the four classes. Test data are measured by the four HMMs and classified based on the maximum likelihood obtained from the four HMMs. The results show that HMM yields better performance than Bayesian linear discriminant analysis.

关键词： Brain computer interface

来源：评论

学校读者我要写书评

暂无评论

Attribute reduction based on ant colony algorithm for optimization of minimal reductions

引用

Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology 2012年第SUPPL.2期36卷 48-52页

作者： Yin, She-Jie Zhang, Ling-Bo Gu, Xing-Sheng Xu, Zhen-Hao Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and Technology Shanghai 200237 China

Attribute reduction is an important topic of the rough set theory and it's a NP-hard problem to find a minimal reduction. Due to the advantage of ant colony algorithm in solving combinatorial optimization problems, this paper treats attribute reduction as a combinatorial optimization problem, and combines the rough set theory with ant colony algorithm to search the minimal reduction. In accordance with the problems in obtaining many minimal reduction sets of the same length, the paper takes the dependence degree of decision attributes on the non-core attributes to measure the solutions and selects the reduction set which has the maximum dependence degree, so as to find the optimal solution. Experimental results verify the validity of the presented algorithm.

关键词： Rough set theory

来源：评论

学校读者我要写书评

暂无评论

Anchoring gold nanoparticles on graphene nanosheets functionalized with cationic polyelectrolyte: A novel catalyst for 4-nitrophenol reduction

Anchoring gold nanoparticles on graphene nanosheets function...

引用

作者： Qin, Xiaoyun Lu, Wenbo Luo, Yonglan Chang, Guohui Asiri, Abdullah M. Al-Youbi, Abdulrahman O. Sun, Xuping Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province School of Chemistry and Chemical Industry China West Normal University Nanchong 637002 Sichuan China Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Center of Excellence for Advanced Materials Research King Abdulaziz University Jeddah 21589 Saudi Arabia

In this paper, a stable aqueous dispersion of graphene nanosheets (GNs) has been prepared by chemical reduction of graphene oxide (GO) with hydrazine hydrate in the presence of poly [(2-ethyldimethylammonioethyl methacrylate ethyl sulfate)-co-(1-vinylpyrrolidone)] (PQ11). Taking advantages of the fact that PQ11 is a positively charged polymer exhibiting reducing ability, we further demonstrated the subsequent decoration of GN with gold nanoparticals (AuNPs) by in-situ chemical reduction of HAuCl4. It was found that such nanocomposites exhibit good catalytic activity toward 4-nitrophenol (4-NP) reduction and the GN supports also enhance the catalytic activity via a synergistic effect. © 2012 American Scientific Publishers.

关键词： Catalyst activity

来源：评论

学校读者我要写书评

暂无评论

Carbon nanocapsules as an effective sensing platform for fluorescence-enhanced nucleic acid detection

Carbon nanocapsules as an effective sensing platform for flu...

引用

作者： Chang, Guohui Hu, Jianming Lu, Wenbo Qin, Xiaoyun Asiri, Abdullah M. Al-Youbi, Abdulrahman O. Sun, Xuping Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province School of Chemistry and Chemical Industry China West Normal University Nanchong 637002 Sichuan China Optical Engineering Key Laboratory of Chongqing College of Physics and Electronic Engineering Chongqing Normal University Chongqing 400047 China Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Center of Excellence for Advanced Materials Research King Abdulaziz University Jeddah 21589 Saudi Arabia

In this communication, we demonstrate the proof of concept that carbon nanocapsules (CNCs) can be used as an effective fluorescent sensing platform for nucleic acid detection with selectivity down to single-base mismatch. The detection is accomplished by two steps: (1) CNC adsorbs and quenches the fluorescence of the dye-labeled single-stranded DNA (ssDNA) probe;(2) in the presence of the target, a hybridization event occurs, which produces a double-stranded DNA (dsDNA) that detaches from the CNC surface, leading to recovery of the dye fluorescence. Copyright © 2012 American Scientific Publishers. All rights reserved.

关键词： Fluorescence

来源：评论

学校读者我要写书评

暂无评论

Immune response-based algorithm for optimization of dynamic environments

引用

Journal of Central South University 2011年第5期18卷 1563-1571页

作者：史旭华钱锋 Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China University of Science and Technology College of Information Science and Engineering Ningbo University

A novel immune algorithm suitable for dynamic environments (AIDE) was proposed based on a biological immune response *** dynamic process of artificial immune response with operators such as immune cloning,multi-scale variation and gradient-based diversity was *** the immune cloning operator was derived from a stimulation and suppression effect between antibodies and antigens,a sigmoid model that can clearly describe clonal proliferation was *** addition,with the introduction of multiple populations and multi-scale variation,the algorithm can well maintain the population diversity during the dynamic searching *** traditional artificial immune algorithms,which require randomly generated cells added to the current population to explore its fitness landscape,AIDE uses a gradient-based diversity operator to speed up the optimization in the dynamic *** reported algorithms were compared with AIDE by using Moving Peaks *** experiments show that AIDE can maintain high population diversity during the search process,simultaneously can speed up the ***,AIDE is useful for the optimization of dynamic environments.

关键词： dynamic optimization artificial immune algorithms immune response multi-scale variation

来源：评论

学校读者我要写书评

暂无评论

Poly (Lactic Acid) Production for Tissue Engineering Applications

引用

Procedia Engineering 2012年 42卷 1402-1413页

作者： M. Savioli Lopes A.L. Jardini R. Maciel Filho Laboratory of Optimization Design and Advanced Control School of Chemical Engineering State University of Campinas Campinas (SP) P.O. Box 6066 13083-970 Brazil Institute of Biofabrication State University of Campinas Campinas (SP) P.O. Box 6066 13083-970 Brazil

Tissue engineering is the most fascinating domain of medical technology and has emerged as a promising alternative approach in the treatment of malfunctioning or lost organs where patients are treated by using their own cells, grown on a polymer support so that a tissue part is regenerated from the natural cells. This support is known as scaffold and is needed to serve as an adhesive substrate for the implanted cells and a physical support to guide the formation of the new organs. In addition to facilitating cell adhesion, promoting cell growth, and allowing the retention of differentiated cell functions, the scaffold should be biocompatible, biodegradable, highly porous with a large surface/volume ratio, mechanically strong, and malleable. The scaffold degrades while a new organ or tissue is formed. A number of three-dimensional porous scaffolds fabricated from various kinds of biodegradable materials have been developed. Bioabsorbable polymers have been identified as alternative materials for biomedical applications, since these polymers are degraded by simple hydrolysis to products that can be metabolized by the human body. With their excellent biocompatibility, poly-lactones such as poly-lactic acid (PLA), poly-glycolic acid (PGA), and poly-caprolactone (PCL), as well as their copolymers are becoming the most commonly used synthetic biodegradable polymers as fixation devices materials for biomedical devices. Among the biomaterials (biopolymers) used in the medical field, the poly (lactic acid) (PLA) has received significant attention. Poly-lactic acid (PLA) is at present one of the most promising biodegradable polymers for this purpose and has convincingly demonstrated the proof of concept for using in bioabsorbable polymer as bone fixation devices, owing to its mechanical property profile, thermoplastic possibility and biological properties, such as biocompatibility and biodegradability. It is produced from lactic acid, a naturally occurring organic acid that c

关键词： Tissue engineering poly (lactic acid) biomaterials scaffold

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：