检索结果-内蒙古大学图书馆

5th IASTED European Conference on Internet and Multimedia Systems and Applications, EuroIMSA 2009

作者： Wuu, Lih-Chyau Hung, Chi-Hsiang Department of Computer Science and Information Engineering National Yunlin University of Science and Technology 123 University Road Touliu Yunlin Taiwan Graduate School of Engineering Science and Technology Doctoral Program National Yunlin University of Science and Technology 123 University Road Touliu Yunlin Taiwan

ISBN: (纸本)9780889868021

In Internet, IP multicast has been used successfully to provide an efficient, best-effort delivery service for group communication applications. However, applications such as multiparty private conference, distribution of stock market information, pay per view and other subscriber services require secure multicast to protect integrity and confidentiality of the group traffic, and validate group member's authenticity. Providing secure multicast for group communication is problematic without a robust group key management. In this paper, we propose an anonymous group key management with ID-based Signature and secret sharing technologies to distribute a new group key securely to each participant of a group with only one rekey message whenever the group membership changes. The key management guarantees that a legal user, without revealing his/her real identity, can join a group after finishing the mutual authentication with the group initiator, and enforces the forward secrecy and backward secrecy.

关键词： Multicasting

来源：评论

学校读者我要写书评

暂无评论

Registration of finger vein image using skin surface information for authentication

Registration of finger vein image using skin surface informa...

引用

Image Processing: Machine Vision Applications II

作者： Noh, SeungWoo Kong, Hyoun-Joong Park, SangYun Kim, JiMan Lee, Seung-Rae Kim, Taejeong Kim, Hee Chan Interdisciplinary Program Bioengineering Major Graduate School Seoul National University Seoul Korea Republic of Interdisciplinary Program Biomedical Engineering Major Graduate School Seoul National University Seoul Korea Republic of Institute of Medical and Biological Engineering Medical Research Center Seoul National University Seoul Korea Republic of Department of Electrical Engineering and Computer Sciences Seoul National University Seoul Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Seoul Korea Republic of

ISBN: (纸本)9780819475015

The finger vein image acquired with an acquisition system should be properly aligned to proceed with comparing algorithm. However it is not easy to find control the points since the images are naturally blurred with an inherent scattering property. To overcome this problem, we propose a novel finger vein registration method utilizing skin surface information (i.e. wrinkles and outlines). We assumed that finger crooking was insignificant. Images were sampled with intended translation and rotation. Each time, two images were acquired successively by switching the light source;one with infrared light and the other with white light. Degree of rotation and translation of sampled image were calculated using outline features in the white light image and then the infrared image was transformed according to the calculated data. To validate our method, correlation values were computed between identical subjects and different subjects. High correlation values were shown between identical subjects whereas low values were shown between different subjects. © 2009 SPIE.

关键词： Authentication

来源：评论

学校读者我要写书评

暂无评论

A Public Keys Based Architecture for P2P Identification, Content Authenticity and Reputation

A Public Keys Based Architecture for P2P Identification, Con...

引用

International Conference on Advanced Information Networking and Applications Workshops (AINAW)

作者： Neander L. Brisola Altair O. Santin Lau C. Lung Heverson B. Ribeiro Marcelo H. Vithoft Pontifical Catholic University of Paraná Graduate Program on Computer Science Curitiba Paraná Brazil Department of Computer Science Florianopolis Federal University of Santa Catarina Santa Catarina Brazil

In the classic use of P2P, e.g. file sharing, there is no concern about persistent peer identification, peer and content reputation and content authenticity. Security proposals currently found in technical literature try to adapt techniques from client-server architecture to P2P environments, which it is not the most appropriate approach. This work proposes applying public keys to identify peers. It allows creating a persistent identification scheme, without losing anonymity, even in a self-managed environment as P2P. Also, it applies digital signature to provide authenticity to the P2P content and to guarantee non-repudiation in the content transfer. In order to provide credibility to the non-certified content and public keys a reputation mechanism is applied. We have developed a prototype to show the benefits of this approach.

关键词： Public key Peer to peer computing Digital signatures Pollution computer science Network servers Certification Application software computer architecture Proposals

来源：评论

学校读者我要写书评

暂无评论

Fatigue and Non-Fatigue Mathematical Muscle Models During Functional Electrical Stimulation of Paralyzed Muscle

引用

IFAC Proceedings Volumes 2009年第12期42卷 365-370页

作者： Zhijun Cai Er-Wei Bai Richard K. Shield Electrical and Computer Engineering The University of Iowa Iowa City IA 52242USA Graduate Program in Physical Therapy and Rehabilitation Science The University of Iowa Iowa City IA 52242 USA

Electrical muscle stimulation demonstrates potential for restoring functional movement and for preventing muscle atrophy after spinal cord injury (SCI). To optimize delivery of electrical stimulation protocols, an accurate and easy-to-implement mathematical skeletal muscle model is essential. The existing models are either accurate but complex, making them hard to implement, such as the Hill-Huxley-type model, or simple but inaccurate, such as second order model. In this paper, we propose a Wiener-Hammerstein system to model the paralyzed skeletal muscle dynamics under electrical stimulus conditions. The proposed model has substantial advantages in identification algorithm analysis and implementation including computational complexity and convergence. Experimental data sets were collected on soleus muscles under 15 Hz frequency stimulation for fourteen subjects with SCI. The simulation results show that the proposed model outperforms the Hill-Huxley-type model not only in peak force prediction, but also in fitting performance for force output of each individual stimulation train.

关键词： modeling identification muscle modeling fatigue modeling

来源：评论

学校读者我要写书评

暂无评论

Understanding quantification of microvascularity with high-frequency power Doppler ultrasound

Understanding quantification of microvascularity with high-f...

引用

Medical Imaging 2009: Ultrasonic Imaging and Signal Processing

作者： Pinter, Stephen Z. Lacefield, James C. Biomedical Engineering Graduate Program Departments of Electrical University of Western Ontario London ON Canada Department of Electrical and Computer Engineering University of Western Ontario London ON Canada Department of Medical Biophysics University of Western Ontario London ON Canada Robarts Research Institute University of Western Ontario London ON Canada

ISBN: (纸本)9780819475169

High-frequency power Doppler imaging of angiogenesis can be challenging given the presence of small blood vessels and slow flow velocities. In the presence of substantial Doppler artifacts such as false-positive color pixels or undetected vessels, color pixel density (CPD) and related vascularity metrics do not provide accurate estimates of vascular volume fraction. As a step towards improved microvascular quantification, flow-phantom experiments were performed to establish relationships between CPD and wall filter cut-off velocity for various combinations of vessel size (160, 200, 250, 300, and 360 μm), flow velocity (4, 3, 2, 1, and 0.5 mm/s), and transducer frequency (30 and 40 MHz). Three distinct regions were observed in plots of CPD versus wall filter cut-off velocity: overestimation of CPD at low cut-offs, underestimation of CPD at high cut-offs, and a plateau at intermediate cut-offs. The CPD at the plateau closely matched the phantom's actual vascular volume fraction. The length of the plateau corresponded with the flow-detection performance of the Doppler system, which was assessed using receiver operating characteristic analysis. Color pixel density versus wall filter cut-off curves from analogous in vivo experiments exhibited the same shape, including a distinct CPD plateau. The similar shape of the flow-phantom and in vivo curves suggests that the presence of a plateau can be used to identify the best-estimate CPD value in an in vivo experiment. The ability to identify the best CPD estimate is expected to improve quantification of angiogenesis and anti-angiogenic treatment responses with power Doppler. © 2009 SPIE.

关键词： Flow velocity

来源：评论

学校读者我要写书评

暂无评论

Interval-based evolving modeling

Interval-based evolving modeling

引用

IEEE Workshop on Evolving and Self-Developing Intelligent Systems, ESDIS

作者： Daniel F. Leite Pyramo Costa Fernando Gomide Faculty of Electrical and Computer Engineering State University of Campinas-UNICAMP Brazil Graduate Program in Electrical Engineering Catholic University of Minas Gerais Brazil

This paper introduces a granular, interval-based evolving modeling (IBeM) approach to develop system models from a stream of data. IBeM is an evolving rule-based modeling scheme that gradually adapts its structure (information granules and rule base) and rules antecedent and consequent parameters from data (inductive learning). Its main purpose is continuous learning, self-organization, and adaptation to unknown environments. The IBeM approach develops global model of a system using a fast, one-pass learning algorithm, and modest memory requirements. To illustrate the effectiveness of the approach, the paper considers actual time series forecasting applications concerning electricity load and stream flow forecasting.

关键词： Predictive models Load forecasting Mathematical model Power system modeling Chaos Neural networks Demand forecasting Data engineering Data analysis Frequency domain analysis

来源：评论

学校读者我要写书评

暂无评论

Evolving granular classification neural networks

Evolving granular classification neural networks

引用

International Joint Conference on Neural Networks (IJCNN)

The objective of this study is to introduce the concept of evolving granular neural networks (eGNN) and to develop a framework of information granulation and its role in the online design of neural networks. The suggested eGNN are neural models supported by granule-based learning algorithms whose aim is to tackle classification problems in continuously changing environments. eGNN are constructed from streams of data using fast incremental learning algorithms. eGNN models require a relatively small amount of memory to perform classification tasks. Basically, they try to find information occurring in the incoming data using the concept of granules and T-S neurons as basic processing elements. The main characteristics of eGNN models are continuous learning, self-organization, and adaptation to unknown environments. Association rules and parameters can be easily extracted from its structure at any step during the evolving process. The rule base gives a granular description of the behavior of the system in the input space together with the associated classes. To illustrate the effectiveness of the approach, the paper considers the Iris and Wine benchmark problems.

关键词： Neural networks Prototypes Neurons Clustering methods Electrochemical machining computer networks Design engineering Association rules Data mining Iris

来源：评论

学校读者我要写书评

暂无评论

A topology control algorithm for wireless sensor networks that considers overhearing

A topology control algorithm for wireless sensor networks th...

引用

International Symposium on Autonomous Decentralized Systems (ISADAS)

作者： Flavio M. Assis Silva Ulisses Telemaco Neto PPGM-Graduate Program on Mechatronics LaSiD-Distributed Systems Laboratory DCC-Department of Computer Science UFBA-Federal University of Bahia Salvador Bahia Brazil

Topology control is one of the main techniques that can be used to decrease energy spenditure in wireless sensor networks. Although it has been the subject of much research, less attention has been devoted to study the effects of overhearing on topology control, i.e., the effects of the cost implied by nodes hearing transmissions even if these transmissions were not intended to them. In this paper we describe a distributed (localized) algorithm for topology control in wireless sensor networks. Our approach differs from previous work mainly in the sense that it takes the effects of overhearing into consideration and that it might eliminate more communication links from a given connectivity graph, and thus possibly assign lower transmission power to some nodes. This is done by eliminating so-called k-redundant edges, instead of eliminating only two redundant edges. We present the sketch of the proof of properties of the algorithm and simulation results.

关键词： Network topology Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Design of interleaved multithreading for Network Processors on Chip

Design of interleaved multithreading for Network Processors ...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Henrique C. Freitas Felipe L. Madruga Marco A. Z. Alves Philippe O. A. Navaux Graduate Program in Computer Science Informatics Institute Universidade Federal do Rio Grande do Sul Porto Alegre Rio Grande do Sul Brazil

ISBN: (纸本)9781424438273

Thread level parallelism and multi-core processors are current alternatives to increase performance of general-purpose applications. In the same way, networks-on-ohip (NoCs) are the main alternatives for supporting packet throughput for the next generations of many-core processors. NPoC (network processor on chip) is a proposal to increase the performance of programmable NoC routers and multi-cluster NoC architectures using interleaved multithreading (IMT) technique. Therefore, the main goal of this paper is to present the design impact of interleaved multithreading for network processors on chip focusing on area and performance feasibility. Results show that NPoC-based router has an acceptable and similar area relative to a conventional NoC, and higher performance up to 7.1% than the same NPoC version without IMT.

关键词： Multithreading Network-on-a-chip Throughput Pipelines Parallel processing Yarn Switches Hardware Costs Wire

来源：评论

学校读者我要写书评

暂无评论

Applying quorum role in network management

Applying quorum role in network management

引用

IFIP/IEEE International Symposium on Integrated Network Management

作者： Edemilson da Silva Altair Olivo Santin Edgard Jamhour Carlos Maziero Emir Toktar Graduate Program in Computer Science Pontifical Catholic University of Paraná Curitiba Parana Brazil LIP6 Computing Laboratory University of Paris VI Paris France

ISBN: (纸本)9781424434862

This work presents a proposal for extending the role-based access control (RBAC) model to support activities that demand runtime mutability in their authorization attributes. Such activities cannot be subdivided in a set of subtasks executed sequentially neither can be accomplished by a single role. The approach presented allows the creation of quorum roles, which can only be activated in a session with the endorsement of a quorum of other roles. A prototype illustrates the application of our proposal in a network management scenario. In the illustrative scenario, a previously defined set of roles, by endorsement, activates a quorum role to perform a management task without the participation of the network administrator role.

关键词： Authorization Access control Proposals NIST computer network management computer science computer networks Runtime Prototypes Centralized control

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：