检索结果-内蒙古大学图书馆

ARMin - Exoskeleton robot for stroke rehabilitation

World Congress on Medical Physics and Biomedical engineering: Neuroengineering, Neural systems, Rehabilitation and Prosthetics

作者： Nef, Tobias Guidali, Marco Klamroth-Marganska, Verena Riener, Robert Department of Biomedical Engineering Catholic University of America Washington DC United States Center for Applied Biomechanics and Rehabilitation Research National Rehabilitation Hospital Washington DC United States Sensory-Motor Systems Lab. Institute of Robotics and Intelligent Systems ETH Zurich Switzerland Spinal Cord Injury Center Balgrist University Hospital University of Zurich Switzerland

ISBN: (纸本)9783642038884

Rehabilitation robots are becoming an important tool in rehabilitation of stroke, SCI and other neurological pathologies. Compared to manual arm training, robot-supported training can be more intensive, of longer duration, repetitive and task-oriented. Therefore, such devices have the potential to improve the rehabilitation process in stroke patients. Whereas a majority of previous work in upper limb rehabilitation robotics has focused on end-effector based robots, a shift toward exoskeleton robots is taking place because they offer a better guidance of the human arm, especially for movements with large range of motions. One of the first actuated exoskeleton robot that is ready for deployment in clinics is the ARMin III robot. This paper gives a short overview of the ongoing clinical application and evaluation process of the ARMin III robot. © 2009 Springer-Verlag.

关键词： Exoskeleton (Robotics)

来源：评论

学校读者我要写书评

暂无评论

Variational Bayesian framework for estimating parameters of integrated E/MEG and fMRI model

Variational Bayesian framework for estimating parameters of ...

引用

Medical Imaging 2009: Biomedical Applications in Molecular, Structural, and Functional Imaging

作者： Babajani-Feremi, Abbas Bowyer, Susan Moran, John Elisevich, Kost Soltanian-Zadeh, Hamid Image Analysis Lab. Radiology Department Henry Ford Hospital Detroit MI 48202 United States Neuromagnetism Lab. Neurology Department Henry Ford Hospital Detroit MI 48202 United States Department of Neurology Henry Ford Hospital Detroit MI 48202 United States Control and Intelligent Processing Center of Excellence Electrical and Computer Engineering Department University of Tehran Tehran 14395-515 Iran

ISBN: (纸本)9780819475138

The integrated analysis of the Electroencephalography (EEG), Magnetoencephalography (MEG), and functional magnetic resonance imaging (fMRI) are instrumental for functional neuroimaging of the brain. A bottom-up integrated E/MEG and fMRI model based on physiology as well as a method for estimating its parameters are keys to the integrated analysis. We propose the variational Bayesian expectation maximization (VBEM) method to estimate parameters of our proposed integrated model. VBEM method iteratively optimizes a lower bound on the marginal likelihood. An iteration of the VBEM consists of two steps: a variational Bayesian expectation step implemented using the extended Kalman smoother (EKS) and the posterior probability of the parameters in the previous step, and a variational Bayesian maximization step to estimate the posterior distributions of the parameters. For a given external stimulus, a variety of multi-area models can be considered in which the number of areas and the configuration and strength of connections between the areas are different. The proposed VBEM method can be used to select an optimal model as well as estimate its parameters. The efficiency of the proposed VBEM method is illustrated using simulation and real datasets. The proposed VBEM method can be used to estimate parameters of other non- linear dynamical systems. This study proposes an effective method to integrate E/MEG and fMRI and plans to use these techniques in functional neuroimaging. © 2009 SPIE.

关键词： Electroencephalography

来源：评论

学校读者我要写书评

暂无评论

Validation of a model of regulation in the tryptophan operon against multiple experiment data using global optimisation

Validation of a model of regulation in the tryptophan operon...

引用

ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Kim, Jongrae Kim, Jung-Su Postlethwaite, Ian Heslop-Harrison, Pat Bates, Declan G. Dept. of Aerospace Engineering University of Glasgow Glasgow United Kingdom Dept. of Control and Instrumentation Eng. Seoul National University of Technology Seoul Korea Republic of Systems Biology Lab. Depts. of Engineering and Biology University of Leicester LE1 7RH United Kingdom

ISBN: (纸本)9784907764333

This paper is concerned with validating a mathematical model of regulation in the tryptophan operon using global optimization. Although a number of models for this biochemical network are proposed, in many cases only qualitative agreement between the model output and experimental data was demonstrated, since very little information is currently availab.e to guide the selection of parameter values for the models. This paper presents a model validating method using both multiple experimental data and global optimization. © 2009 SICE.

关键词： Global optimization

来源：评论

学校读者我要写书评

暂无评论

Compiler/hardware assisted application code and data security in embedded systems

Compiler/hardware assisted application code and data securit...

引用

Conference on Digital Avionics systems (DASC)

作者： Chunguang Bu Xiang Wang Chi Zhang Jizhong Liu Xiaodong Wang Baosen Li School of Electronic and Information Engineering Beihang University Beijing China Aerospace Intelligent Control National Key Lab. of Sci. and Tech. on Beijing China

Embedded systems have stepped deeper into Integrated Avionics systems, and security is becoming an important concern. Most embedded systems present a number of software vulnerabilities, such as buffer overflows. Furthermore, the rapid growth and pervasive use of embedded systems makes it easier for a sophisticated attacker to gain physical access to launch physical attacks on insecure off-chip main memory. This paper presents a novel compiler/hardware assisted application code and data protection architecture (CHCDP) to monitor the execution of application. The compiler extracts the control flow and static data integrity validation information using hashing and cyclical redundancy check (CRC) integrity algorithms at compile time. The dynamic data integrity validation is generated in the process of application execution. Likewise, the function return address and frame point are also protected at runtime. The designed hardware observes its dynamic execution trace and checks whether the trace conforms to the permissible behavior. And it will trigger appropriate response mechanisms if finding a mismatch. An OR1200 processor is assigned to build a system on a programmable chip (SOPC) that implements the architectural design. The experimental analysis shows that the proposed techniques can eliminate a wide range of common software and physical attacks with low performance penalties and minimal overheads.

关键词： Hardware Data security Embedded system Application software Protection Cyclic redundancy check Aerospace electronics Embedded software Buffer overflow Computer architecture

来源：评论

学校读者我要写书评

暂无评论

Global Asymptotical Stabilization of Morse-Smale systems Using Weak control-Lyapunov Functions

引用

SICE Journal of control, Measurement, and System Integration 2009年第1期2卷 43-49页

作者： Gou Nishida Takayuki Tsuzuki Hisakazu Nakamura Yuh Yamashita RIKEN-TRI Collaboration Center for Human-Interactive Robot Research Center Advanced Science Institute RIKEN Department of Electronic and Control Systems Engineering Interdisciplinary Faculty of Science and Engineering Shimane University Systems and Control Lab. Graduate School of Information Science Nara Institute of Science and Technology Division of Systems Science and Informatics Graduate School of Information Science and Technology Hokkaido University

This paper proposes a method of constructing weak control-Lyapunov functions for nonlinear systems by introducing a topological geometric assumption called a Morse-Smale system. A Lyapunov function is one of the most important tools to study stability and stabilization of nonlinear systems. However, a general way of finding Lyapunov functions has not been found yet. First, we confirm there is a weak Lyapunov function for Morse-Smale systems. Next, we define the escapability for singular structures of the weak Lyapunov function. If all singular structures are escapable, then the Morse-Smale system is a globally asymptotically stabilizable one. Finally, we present the method of constructing a set of weak control-Lyapunov functions to achieve global stabilization. The method is described in terms of a recursive sequence of singular structures. We call the sequence a weak Lyapunov filtration.

关键词： nonlinear systems Lyapunov functions iterative modeling and control design

来源：评论

学校读者我要写书评

暂无评论

Higher-order model-free adaptive control for permanent magnet linear motor

Higher-order model-free adaptive control for permanent magne...

引用

Chinese control and Decision Conference, CCDC

作者： Rong-hu Chi Zhong-sheng Hou Institute of Autonomous Navigation and Intelligent Control School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingdao China Advanced Control Systems Lab School of Electronics & Information Engineering Beijing Jiaotong University 100044 China

A higher-order model-free adaptive control is presented for improving the permanent magnet linear motor position and velocity tracking performance. The controller is comprised of the adaptive control law and the PPD updating law. The control law gain is not linear but expressed by a nonlinear function with the PPD parameter tuned on-line by the updating law. The control design is model-free and just depends on the I/O data of the system, without requiring any other priori. By introducing higher-order learning law, this method can incorporate more control information obtained in previous sampling time instants, with a result of improving the convergence performance greatly. Simulation results illustrate the validity of the presented method.

关键词： Adaptive control Permanent magnet motors Partial response channels Navigation intelligent control Automation control system synthesis Automatic control Gain control design

来源：评论

学校读者我要写书评

暂无评论

Hybrid robust observers for locally Lipschitz systems

Hybrid robust observers for locally Lipschitz systems

引用

European control Conference (ECC)

作者： Alexey A. Bobtsov Denis V. Efimov Department of Control Systems and Informatics Saint-Petersburg State University of Information Technologies Mechanics and Optics St. Petersburg Russia Systems and Control @ Systems and Modeling Department Electrical Engineering and Computer Science Belgium CCS Lab. Institute for Problems of Mechanical Engineering St. Petersburg Russia

State observer design procedure is proposed for nonlinear locally Lipschitz systems. Possible presence of disturbances is taken into account. The solution is based on logic-based control approach applicable to nonline... 详细信息

关键词： Decision support systems Europe

来源：评论

学校读者我要写书评

暂无评论

Multi-step Prediction Error Approach for MPC Performance Monitoring *

引用

IFAC Proceedings Volumes 2009年第11期42卷 482-487页

作者： Yu Zhao Jian Chu Hongye Su Biao Huang State Key Lab. of Industrial Control Technology Institute of Cyber Systems and Control Zhejiang University Hangzhou China Department of Chemical and Materials Engineering University of Alberta Edmonton AB Canada T6G 2G6

Abstract Performance monitoring of model predictive control systems (MPC) has received a great interest from both academia and industry. In recent years some novel approaches for multivariate control performance monitoring have been developed without the requirement of process models or interactor matrices. Among them the prediction error approach has been shown to be a promising one, but it is k-step prediction based and may not be fully comparable with the MPC objective that is multi-step prediction based. This paper develops a multi-step prediction error approach for performance monitoring of model predictive control systems, and demonstrates its application in an industrial MPC performance monitoring and diagnosis problem.

关键词： Multivariable control systems Model predictive control Performance evaluation Performance monitoring Prediction error methods

来源：评论

学校读者我要写书评

暂无评论

Hybrid robust observers for locally Lipschitz systems 10

Hybrid robust observers for locally Lipschitz systems

引用

2009 10th European control Conference, ECC 2009

作者： Bobtsov, Alexey A. Efimov, Denis V. Department of Control Systems and Informatics Saint-Petersburg State University of Information Technologies Mechanics and Optics Kronverksky av. 49 St-Petersburg197101 Russia CCS Lab. Institute for Problems of Mechanical Engineering Bolshoi av. 61 V.O. St. Petersburg199178 Russia Systems and Modeling Department of Electrical Engineering and Computer Science Unviersité de Liège Liege Sart-TilmanB-4000 Belgium

ISBN: (纸本)9783952417393

关键词： Nonlinear systems

来源：评论

学校读者我要写书评

暂无评论

Multi-area integrated E/MEG and fMRI modeling

Multi-area integrated E/MEG and fMRI modeling

引用

Medical Imaging 2009: Biomedical Applications in Molecular, Structural, and Functional Imaging

作者： Babajani-Feremi, Abbas Bowyer, Susan Moran, John Elisevich, Kost Podell, Kenneth Soltanian-Zadeh, Hamid Image Analysis Lab. Radiology Department Henry Ford Hospital Detroit MI 48202 United States Neuromagnetism Lab. Neurology Department Henry Ford Hospital Detroit MI 48202 United States Department of Neurology Henry Ford Hospital Detroit MI 48202 United States Division of Neuropsychology and Sports Concussion Safety Program Henry Ford Hospital Detroit MI 48202 United States Control and Intelligent Processing Center of Excellence Electrical and Computer Engineering Department University of Tehran Tehran 14395-515 Iran

ISBN: (纸本)9780819475138

Functional magnetic resonance imaging (fMRI) has complementary spatiotemporal resolution compared to Electroencephalography (EEG) as well as Magnetoencephalography (MEG). Thus, their integrated analysis should improve the overall resolution. To integrate analysis of E/MEG and fMRI, we extend our previously proposed integrated E/MEG and fMRI neural mass model to a multi-area model by defining two types of connections: the Short-Range Connections (SRCs) between minicolumns within the areas and Long-Range Connections (LRCs) between inter-areas minicolumns. The nonlinear input/output relationship in the proposed model is derived from the state space representation of the multi-area model. The E/MEG signals are originated from the overall synaptic activities of the pyramidal cells of all minicolumns and can be calculated using the lead field matrix (i.e., forward electromagnetic model). The fMRI signal is extracted from the proposed integrated model by calculating the overall neural activities in the areas and using it as the input of the extended balloon model (EBM). Using the simulation results, the capabilities of the proposed model to generate E/MEG and fMRI signals is shown. In addition, changes in the dynamics of the model to variations of its parameters were evaluated and lead us to the appropriate ranges for the parameters. In conclusion, this work proposes an effective method to integrate E/MEG and fMRI for the more effective use of these techniques in functional neuroimaging. © 2009 SPIE.

关键词： Electroencephalography

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：