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Neurological rehabilitation of stroke patients via motor imaginary-based brain-computer interface technology

Neural Regeneration Research 2011年第28期6卷 2198-2202页

作者： Hongyu Sun Yang Xiang Mingdao Yang Department of Computer Science and Technology Tongji University Shanghai 201804 China College of Information and Electrical Engineering Shandong University of Science and Technology China Key Laboratory of Embedded System and Service Computing Ministry of Education of the People＇s Republic of China Tongji University Shanghai 201804 China Qingdao Economic ＆ Technical Development Area First People＇s Hospital Qingdao 266555 Shangdong Province China

The present study utilized motor imaginary-based brain-computer interface technology combined with rehabilitation training in 20 stroke patients. Results from the Berg Balance Scale and the Holden Walking Classification were significantly greater at 4 weeks after treatment （P 〈 0.01）, which suggested that motor imaginary-based brain-computer interface technology improved balance and walking in stroke patients.

关键词： brain-computer interface motor cortex neuronal plasticity rehabilitation stroke neural regeneration

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Assigning method for decision power based on linguisitc 2-tuple judgment matrices

Journal of Software

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Journal of Software 2011年第3期6卷 508-515页

作者： Zhang, Xixiang Yue, Guangxue Zheng, Xiajie Yu, Fei Business School of Jiaxing University Jiaxing China Mathematics and Information Engineering School of Jiaxing University Jiaxing China Department of Computer Science and Technology Huaihua University Huaihua China Jiangsu Provincial Key Laboratory for Computer Information Processing Technology Soochow University Soochow China

Decision power is very important in group decision making, which effects the final decision making result. When there exists uncertainty in group decision making, it is easy for an expert to express his/her preferences using fuzzy linguistic term such as 'good', 'very good'. The linguistic 2-tuple representation model was selected to represent fuzzy linguistic term for its accuracy in representing fuzzy terms and less loss of information in processing. To obtain the objective decision power in group decision making where the experts express their opinions using linguistic 2-tuple judgment matrices, the paper put forward a new approach to assign decision power based on element consistency level. And the method for calculating the contribution degree of each expert was also provided. The proposed method thought of calculating the different weight to aggregate different element according to the element consistent level. An illustrated example was used to demonstrate the proposed method. And a GDSS based on the method was also developed to simplify the application in ***. The GDSS was applied to building non-financial performance system for listed company in small and medium enterprise board in China, which showed its reasonability. © 2011 ACADEMY PUBLISHER.

关键词： Linguistics

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Case-based safety assessment of thermal power plants: A framework

Case-based safety assessment of thermal power plants: A fram...

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2011 International Conference on Business Management and Electronic information, BMEI 2011 - 2011 International Conference on Supernetworks and system Management, ICSSM 2011

作者： Liang, Changyong Gu, Dongxiao Bichindaritz, Isabelle Zuo, Chunrong Cheng, Fei School of Management Hefei University of Technology Hefei Anhui 230009 China Key Laboratory of Process Optimization Intelligent Decision-making of Ministry of Education of China Hefei Anhui 230009 China Institute of Technology University of Washington Tacoma WA 98402 United States Department of Computer Science University of Illinois at Chicago Chicago IL 60607 United States Research Center of Intelligent Decision Making Information System Technologies of Ministry of Education of China Hefei Anhui 230009 China

ISBN: (纸本)9781612841069

security assessment of Thermal Power Plants (TPPs) is one of the important means to guarantee the safety of production in thermal power production enterprises. Essentially, the evaluation of power plant systems relies to a large extent on the knowledge and length of experience of the experts. Therefore in this domain Case-Based Reasoning (CBR) is introduced for the security assessment of TPPs since this methodology models expertise through experience management. Taking the management system of TPPs as breakthrough point, this paper presents a case-based approach for the security assessment decision support of TPPs (SATPP). First, this paper reviews commonly used approaches for TPPs security assessment and the current general evaluation process of TPPs security assessment. Then a framework for the Management system security Assessment of Thermal Power Plants (MSSATPP) is constructed and an Intelligent Decision Support system for MSSATPP (IDSS-MSSATPP) is functionally designed. MSSATPP involves several key technologies and methods such as knowledge representation and case matching. © 2011 IEEE.

关键词： Case based reasoning

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Distributed Angle Estimation for Wireless Sensor Network Localization with Multipath Fading

Distributed Angle Estimation for Wireless Sensor Network Loc...

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IEEE International Conference on Communications (ICC)

作者： Weile Zhang Qinye Yin Hongyang Chen Wenjie Wang Tomoaki Ohtsuki MOE Key Laboratory for Intelligent Networks and Network Security Xi''an Jiaotong University Xi'an China Institute of Industrial Science University of Tokyo Tokyo Japan Department of Information and Computer Science Keio University Yokohama Japan

In this paper, we propose a distributed angle estimation method for wireless sensor network localization with multipath fading. The multiple antenna system is equipped at the anchor and the angle of departure (AOD) can be estimated individually at each sensor node with single antenna system. Further, we exploit the space diversity to improve the estimation performance by deploying multiple parallel arrays at the anchor. Analysis and simulations demonstrate the effectiveness of our method.

关键词： Estimation Receivers Peer to peer computing Wireless sensor networks Interference Delay Transceivers

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Secure identity-based threshold broadcast encryption in the standard model

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Journal of Networks 2011年第11期6卷 1602-1609页

作者： Zhang, Leyou Wu, Qing Hu, Yupu Department of Mathematical Science Xidian University Xi'an 710071 China School of Automation Xi'an Institute of Posts and Telecommunications Xi'an China Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China

The general threshold broadcast encryption is not suitable for the networks with the constraints of computation and energy. In this paper, two constructions of the proper threshold broadcast encryption to these networks are proposed. In the proposed schemes, any user can dynamically join the system as a possible recipient, and the sender can dynamically choose the set of recipients S and the threshold value t. The new schemes achieve constant size private keys and O(n-t)-size ciphertexts. In addition, these schemes achieve full security in the standard model. Finally, we also show that they are provable security under n+1-Weak Decision Bilinear Diffie-Hellman Exponent (n+1wDBDHE) assumption and the static assumptions respectively. © 2011 ACADEMY PUBLISHER.

关键词： Cryptography

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Smoothness in noise reduction of chaotic time series

Smoothness in noise reduction of chaotic time series

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2011 International Conference on computers, Communications, Control and Automation

作者： Chenxi Shao Jiangong Ji Jingyuan Shao Lipeng Xiao Department of Computer Science and Technology University of Science and Technology of China Department of Modern Physics and Nonlinear Science Center University of Science and Technology of China Anhui Province Key Laboratory of Software in Computing and Communication Information center Jianghuai Automobile Co.Ltd.

Noise is an omnipresent phenomenon. It obscures the real behavior of dynamical system. Lots of methods are proposed to remove the noise contaminating time series. However, almost all the methods consider the noise reduction in the phase space and often sharp points are kept. Different with these methods, this paper proposes a method directly on the time series itself, considering the gauss noise feature and the smoothness of the real data, uses curve-fitting way to eliminate the sharp points. The numeral results verify the effectiveness of our method.

关键词： smoothness,noise reduction,curve-fitting,Local-Geometric-Projection

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Energy Optimal Selection of Access Points in Wireless Sensor Networks

Energy Optimal Selection of Access Points in Wireless Sensor...

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International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS)

作者： Qin Xin Xiaolan Yao Wei He State Key Laboratory of Power Transmission Equipment & System Security and New Technology College of Electrical Engineering Chongqing University China Department of Applied Mathematics Universite Catholique de Louvain Louvain-la-Neuve Belgium School of Computer Science National University of Defense Technology Changsha China

In a Wireless Sensor Networks (WSN), there are normally one or several sensor nodes working as Access Points (AP), which are able to provide a relay for other sensors to an external Internet connection. Since WSNs are resource constrained, the selection of APs is very crucial in economizing power usage. In this paper, we study the optimal selection of APs to maximize the WSN lifetime. This issue is closely related to routing protocols in WSN. We propose a new adaptive multi-path routing protocol to reduce the energy consumption and guarantee QoS requirements with respect to transmission delay. In this paper, we formulate the issues we mentioned above as a non-linear NP-hard optimization problem. Due to the high computation complexity of this problem, we proposed two polynomial-time approximation algorithms to optimally select APs in the WSN that based on the framework in. Combining with our new adaptive multi-path routing protocol, our preliminary simulation results show that our schemes can save more than 20% energy compared with the existing APs selection schemes with single path routing protocols.

关键词： Wireless sensor networks Routing protocols Wireless communication Equations Mobile communication Routing Internet

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A Two-Layered Replica Management Method

A Two-Layered Replica Management Method

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IEEE International Conference on Trust, security and Privacy in Computing and Communications (TrustCom)

作者： Chuncong Xu Xiaomeng Huang Guangwen Yang Yang Zhou Department of Computer Science and Technology Tsinghua University Beijing China Ministry of Education Key Laboratory for Earth System Modeling Center of Earth System Science Institute for Global Change Studies Tsinghua University Beijing China ZTE Corporation Nanjing China

Replica management method has been widely used in distributed file system to improve parallelism and reliability. Traditional replica management method is synchronous replication management (SRM) which updates replicas synchronously. Because of synchronous updating, it is difficult to provide high throughput and low access latency. If the system achieves SRM in the memory hierarchy, it will take a lot of memory space. In order to improve write performance, we design a Two Layered Replica Management Method (TLRMM) based on memory and disk. It can be used for disk-based or memory-based data storage system. TLRMM maintains 3 replicas for every chunk and store one in memory. Using asynchronous update, it can improve the system's I/O performance significantly. We integrated TLRMM in Carrier which is a distributed file system designed by Tsinghua University, and use version number to ensure replica consistency. Furthermore, in order to ensure the reliability of Carrier, we design a replica recovery strategy to solve the failure of single point. We have implemented and evaluated the integrated prototype system. The experimental results show that TLRMM can deliver high performance on distributed file system. Compared with SRM, write throughput of TLRMM increased by a factor of 1.62~2.05, without read performance degradation.

关键词： Throughput Random access memory File systems Reliability Servers Educational institutions Benchmark testing

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Knowledge Granulation in Interval-Valued information systems

Knowledge Granulation in Interval-Valued Information Systems

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International Workshop on Intelligent systems and Applications, ISA

作者： Nan Zhang Duoqian Miao Can Gao Department of Computer Science and Technology University of Tongji Shanghai China Department of Electrical and Computer Engineering University of Alberta Edmonton AB Canada Key Laboratory of Embedded System and Service Computing of Ministry of Education University of Tongji Shanghai China

Rough set theory, proposed by Pawlak, has been proved to be a mathematical tool to deal with vagueness and uncertainty in intelligent information processing. In this paper, we propose the concept of knowledge granulation in interval-valued information systems, and discuss some important properties. From these properties, it can be shown that the proposed knowledge granulation provides important approaches to measuring the discernibility of different knowledge. It may be helpful for rule evaluation and knowledge discovery in interval-valued information systems.

关键词： information systems Approximation methods Uncertainty Rough sets computers Entropy

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A Multi-Hop Privacy-Preserving Reputation Scheme in Online Social Networks

A Multi-Hop Privacy-Preserving Reputation Scheme in Online S...

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2011 IEEE Global Telecommunications Conference - GLOBECOM 2011

作者： Linke Guo Xiaoyan Zhu Chi Zhang Yuguang Fang Department of Electrical and Computer Engineering University of Florida Gainesville FL USA National Key Laboratory of Integrated Services Networks Xidian University Xi'an China School of Information Science and Technology University of Science and Technology Hefei China

Online Social Networks (OSNs) are becoming immensely popular nowadays, and they change the ways people think and live. In this paper, we propose a novel reputation system which allows users to find potential connections between unfamiliar people based on the most updated friend list of each user in OSNs. To some extent, our scheme provides a way to judge people in OSNs without real interactions, but based on the existing overall attitudes on particular people. Moreover, our scheme can protect the confidentially of the potential relationships in which no one is able to acquire the detailed connections between two end nodes. Contrary to those which publish each individual's reputation online, we treat the reputation value in our system as a private issue that has been carefully guaranteed.

关键词： Peer to peer computing Encryption Servers Social network services Privacy

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