检索结果-内蒙古大学图书馆

International Conference on Advanced Information Networking and Applications (AINA)

作者： Xiaofeng Wang Chee Shin Yeo Rajkumar Buyya Jinshu Su College of Computer National University of Defense Technology Hunan China Department of Computer Science and Software Engineering GRIDS Laboratory University of Melbourne VIC Australia

ISBN: (纸本)9781424440009

For an application in public-resource computing environments, providing reliable scheduling based on resource reliability evaluation is becoming increasingly important. Most existing reputation models used for reliability evaluation ignore the time influence. And very few works use a robust genetic algorithm to optimize both time and reliability for a workflow application. Hence, in this paper, we propose the reliability-driven (RD) reputation, which is time dependent and can be used to evaluate a taskpsilas reliability directly using the exponential failure model. Based on the RD reputation, we also propose knowledge-based genetic algorithm (KBGA) to optimize both time and reliability for a workflow application. KBGA uses heuristics to accelerate the evolution process without giving invalid solutions. Our experiments show that the RD reputation can improve the reliability of a workflow application with more accurate reputation, while the KBGA can evolve to better scheduling solutions more quickly than traditional genetic algorithms.

关键词： Processor scheduling Genetic algorithms Grid computing Runtime computer networks Genetic mutations Application software Acceleration Peer to peer computing computer network reliability

来源：评论

学校读者我要写书评

暂无评论

On the mobile wireless access via MIMO relays

On the mobile wireless access via MIMO relays

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Tae Hyun Kim Nitin H. Vaidya Young-Bae Ko Department of Electrical and Computer Engineering Coordinated Science Laboratory University of Illinois Urbana-Champaign IL USA Ubiquitous Networked System Laboratory School of Information and Computer Engineering Ajou University Suwon South Korea

While a network with stationary nodes can provide large capacity in many current wireless systems, a network with mobile users suffers from severe performance degradation. This happens due to quick channel variation and its resulting protocol overheads that are especially large for multiuser multiple-input multiple-output (MIMO) systems. In this paper, we propose a relay-assisted multiuser MIMO downlink system to support highly mobile wireless access. Through a theoretical throughput analysis that explicitly considers the protocol overheads, we show that the MIMO relay significantly enhances the sum throughput of the system.

关键词： MIMO Relays Downlink Throughput Access protocols Vehicles Receiving antennas Pervasive computing Media Access Protocol Transmitting antennas

来源：评论

学校读者我要写书评

暂无评论

A customizable pattern-based software process simulation model: Design, calibration and application

引用

software Process Improvement and Practice 2009年第3期14卷 165-180页

作者： Garousi, Vahid Khosrovian, Keyvan Pfahl, Dietmar Department of Electrical and Computer Engineering Schulich School of Engineering University of Calgary Canada Simula Research Laboratory Software Engineering Department P.O.Box 134 1325 Lysaker Norway Department of Informatics University of Oslo Norway

software process analysis and improvement relies heavily on empirical research. Empirical research requires measurement, experimentation, and modeling. However, whatever evidence is gained via empirical research is strongly context dependent. Thus, it is hard to combine results and capitalize upon them for the purpose of improvement in evolving development environments. The process simulationmodel GENSIM2.0 addresses these challenges. GENSIM 2.0 is a generic process simulation tool representing V-model type software development processes. Compared to existing process simulation models in the literature, the novelty of GENSIM 2.0 is twofold. Firstly, its model structure is customizable to organization-specific processes. This is achieved by using a limited set of generic structures (macro-patterns). Secondly, its model parameters can be easily calibrated to available empirical data and expert knowledge. This is achieved by making the internal model structures explicit and by providing guidance on how to calibrate model parameters. This article outlines the structure of GENSIM 2.0, gives examples on how to calibrate themodel to available empirical data, and demonstrates its usefulness through two application scenarios The first scenario illustrates how GENSIM 2.0 helps in finding effective combinations of verification and validation techniques under given time and effort constraints. The second scenario shows how the simulator supports in finding the best combination of alternative verification techniques. © 2009 John Wiley & Sons, Ltd.

关键词： software design

来源：评论

学校读者我要写书评

暂无评论

A utility model for peering of multi-provider content delivery services

A utility model for peering of multi-provider content delive...

引用

Conference on Local computer Networks (LCN)

作者： Mukaddim Pathan Rajkumar Buyya Grid Computing and Distributed Systems GRIDS Laboratory Department of Computer Science and Software Engineering University of Melbourne Parkville VIC Australia

Peering of Content Delivery Networks (CDNs) allow providers to rapidly scale-out to meet both flash crowds and anticipated increases in demand. Recent trends foster the need for a utility model for content delivery services to provide transparency, high availability, reduced investment cost, and improved content delivery performance. Analysis of prior work reveals only a modest progress in evaluating the utility for peering CDNs. In this paper, we introduce a utility model and measure the content-serving ability of the peering CDNs system. Our model assists in providing a customer view of the system's health for different traffic types. Our model also captures the traffic activities in the system and helps to reveal the true propensities of participating CDNs to cooperate in peering. Through extensive simulations we unveil many interesting observations on how the utility of the peering CDNs system is varied for different system parameters and provide incentives for their exploitation in the system design.

关键词： Costs Traffic control Investments Web server computer networks Grid computing Laboratories computer science software engineering Availability

来源：评论

学校读者我要写书评

暂无评论

Ideal perfect multilevel threshold secret sharing scheme

Ideal perfect multilevel threshold secret sharing scheme

引用

5th International Conference on Information Assurance and Security, IAS 2009

作者： Lin, Changlu Harn, Lein Ye, Dingfeng Key Laboratory of Network Security and Cryptology Fujian Normal University China State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences China Key Laboratory of Communication and Information System Beijing Jiaotong University Beijing Municipal Commission of Education China Department of Computer Science Electrical Engineering University of Missouri-Kansas City United States

ISBN: (纸本)9780769537443

Shamir proposed the first (t, n) threshold secret sharing scheme. Shamir's scheme is ideal and perfect. In this paper, we propose two modifications of Shamir's secret sharing scheme. In our first modification, each shareholder keeps both x-coordinate and y-coordinate of a polynomial as private share. In our second modification, dealer uses polynomial with degree larger than the threshold value t to generate shares for a (t, n) threshold scheme. We show that these two modified schemes are ideal and perfect. Using these two modifications, we design a multilevel threshold secret sharing schemes (MTSS). We prove that the proposed scheme is secure. © 2009 IEEE.

关键词： Information theory

来源：评论

学校读者我要写书评

暂无评论

Exposure-path prevention in directional sensor networks using sector model based percolation

Exposure-path prevention in directional sensor networks usin...

引用

2009 IEEE International Conference on Communications, ICC 2009

作者： Liang, Liu Xi, Zhang Huadong, Ma Networking and Information Systems Laboratory Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843 United States Beijing Key Lab. of Intelligent Telecomm. Software and Multimedia Beijing University of Posts and Telecomm. Beijing 100876 China

ISBN: (纸本)9781424434350

In wireless sensor networks, most existing works on region coverage mainly concentrate on the omnidirectional sensor based full coverage, which ensures that all points in the sensor-deployed region are covered. In contrast, this paper studies the problem of exposure-path prevention for the region coverage in directional sensor networks. Because the exposure paths are prevented as long as no moving objects or phenomena can go through a sensor-deployed region without being detected, exposure-path prevention does not require full coverage, and instead it only needs the partial coverage. Towards this end, we apply the percolation theory to solve the exposure path problem for directional sensor networks. In particular, we map the exposure path problem into a sector based percolation model, and then derive the bounds of critical density where directional sensors are deployed according to a 2-dimensional Poisson process. Also conducted is a set of extensive simulations to validate and evaluate our developed models and schemes. ©2009 IEEE.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

A 54GOPS 51.8mW analog-digital mixed mode Neural Perception Engine for fast object detection

A 54GOPS 51.8mW analog-digital mixed mode Neural Perception ...

引用

Custom Integrated Circuits Conference (CICC)

作者： Minsu Kim Joo-Young Kim Seungjin Lee Jinwook Oh Hoi-Jun Yoo Semiconductor System Laboratory Department of Electronic Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea

A mixed mode Neural Perception Engine (NPE) is proposed as the pre-processing accelerator of multi-object recognition processor to reduce the computational complexity and increase its efficiency. It consists of Motion Estimator (ME), Visual Attention Engine (VAE) and Object Detection Engine (ODE). The fabricated chip achieves 54 GOPS 51.8 mW NPE. By implementing a fast and robust neuro-fuzzy algorithm in analog-digital mixed circuits, the area and power of the ODE is reduced by 59% and 44%, respectively, compared to those of all digital implementation. The NPE can increase the frame rate by 2.09x and reduce power consumption by 38% of the multi-object recognition processor.

关键词： Analog-digital conversion Engines Object detection Energy consumption Signal processing Motion estimation Analog circuits Object recognition Heuristic algorithms Laboratories

来源：评论

学校读者我要写书评

暂无评论

Minimal exposure path algorithms for directional sensor networks

Minimal exposure path algorithms for directional sensor netw...

引用

2009 IEEE Global Telecommunications Conference, GLOBECOM 2009

作者： Liu, Liang Zhang, Xi Ma, Huadong Networking and Information Systems Laboratory Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843 United States Beijing Key Lab. of Intelligent Telecomm. Software and Multimedia Beijing University of Posts and Telecomm. Beijing 100876 China

ISBN: (纸本)9781424441488

As a fundamental problem of wireless sensor networks, the minimal exposure path problem corresponding to the sensor network's worst-case coverage plays an important role in the applications for detecting intrusions. However, most existing works about minimal exposure path are based on omnidirectional sensors. In contrast, this paper studies the minimal exposure path problem for directional sensor networks. We first develop a directional sensing model: directional sensitivity model. Then, we formulate the minimal exposure path problem by using two sensing intensity functions: all-sensor intensity function and maximum-sensor intensity function, and generate two weighted grids to convert the minimal exposure path problem into two discrete geometric problems. Based on the above weighted grids, we also develop two approximation algorithms to find the minimal exposure path for the directional sensitive model. We conduct extensive simulations to validate and evaluate our proposed models and algorithms.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Swarm Robots Long Term Autonomy Using Moveable Charger

Swarm Robots Long Term Autonomy Using Moveable Charger

引用

International Conference on Future computer and Communication, ICFCC

作者： Farshad Arvin Khairulmizam Samsudin Abdul Rahman Ramli Computer Systems Research Group Department of Computer System Engineering University of Putra Malaysia Serdang Malaysia Intelligent System and Robotic Laboratory Institute on Advanced Technology University of Putra Malaysia Serdang Malaysia

This paper proposes an alternative docking charger station for mobile robots. One crucial task in swarm robots scenario is to find low battery robots and recover them. Overcoming this problem requires a versatile mobile charging station that is able to actively locate and charge inactive mobile robots unlike the conventional stationary docking stations. The mobile charger robot should perform independent tasks other than the swarm robots global task. It uses similar communication method with other swarm robots, however new preprogrammed instructions are required to facilitate battery charging task for swarm robots.

关键词： Mobile robots Batteries Intelligent robots Service robots Robotics and automation computer interfaces Portable computers Robot sensing systems Humans Navigation

来源：评论

学校读者我要写书评

暂无评论

A new vertical handover mechanism for convergence of wired and wireless access networks

A new vertical handover mechanism for convergence of wired a...

引用

International Conference on Information Networking

作者： Soohong Park Pyung-Soo Kim Application Software Laboratory Digital Media Research and Development Center Samsung Electronics Company Limited Suwon South Korea System Software Solution Laboratory Department of Electronics Engineering Korea Polytechnic University Siheung South Korea

ISBN: (纸本)9781424445264

This paper proposes a vertical handover mechanism for mobile devices to keep connection with the Internet in wired and wireless coexistence networks. To support vertical handover between two heterogeneous access networks, the intermediate driver including a virtual mini-port driver and a virtual protocol driver is developed newly. Then, an actual IP address is assigned to the virtual mini-port driver. In addition, the intermediate driver includes the media independent handover (MIH) function of IEEE 802.21 standards group for efficient converging of two heterogeneous adapters. When communication via the running adapter gets disconnected while in service, the disconnection of the running adapter is automatically detected by the MIH function and then handover occurs by mapping information on the other adapter to the virtual adapter. Using the proposed handover mechanism, the session can be continued seamlessly even when handover between heterogeneous network adapters occurs at lower level in Internet applications. To evaluate the proposed handover mechanism, actual experiments are performed for wired and wireless coexistence networks using various Internet applications, and then their results are discussed.

关键词： Convergence Wireless networks IP networks Nonhomogeneous media Bridges Cities and towns Driver circuits Wireless LAN Protocols Research and development

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：