检索结果-内蒙古大学图书馆

7th international conference on Formal Methods for Open Object-Based Distributed Systems

作者： Chiyangwa, S Kwiatkowska, M Univ Birmingham Sch Comp Sci Birmingham B15 2TT W Midlands England

ISBN: (纸本)3540261818

Mobile ad hoc networks (MANETs) are wireless networks formed spontaneously. Communication in such networks typically involves multi-hop relays, and is subjected to dynamic topology changes and frequent link failures. this complex scenario demands robust routing protocol standards that ensure correct and timely delivery of messages. Recently, formal verification has been successful in detecting ambiguities in protocol standards. We consider the Ad hoc On Demand Distance Vector (AODV) protocol, a reactive protocol currently undergoing standardisation at the IETF (RFC3561). AODV performs route discovery whenever a route to the destination is needed, and retains routing information for a period of time specified by the standard. We apply the real-time model checker UPPAAL to consider the effect of the protocol parameters on the timing behaviour of AODV, thus complementing the earlier untimed verification effort. Our study of the recent versions of the standard (RFC3561-bis-01) has highlighted a dependency of the lifetime of routes on network size, which can be alleviated by allowing the route timeouts to adapt to network growth.

关键词： Object oriented programming

来源：评论

学校读者我要写书评

暂无评论

Automatic refinement checking for B

引用

7th international conference on Formal Methods and Software Engineering

作者： Leuschel, M Butler, M Univ Southampton Sch Elect & Comp Sci Southampton SO17 1BJ Hants England Univ Dusseldorf Inst Informat D-40225 Dusseldorf Germany

ISBN: (纸本)3540297979

Refinement is a key concept in the B-Method. While refinement is at the heart of the B Method, so far no automatic refinement checker has been developed for it. In this paper we present a refinement checking algorithm and implementation for B. It is based on using an operational semantics of 13, obtained in practice by the PR,013 animator. the refinement checker has been integrated into PROB toolset and we present various case studies and empirical results in the paper, showing the algorithm to be Surprisingly effective. the algorithm checks that a refinement preserves the trace properties of a specification. We also compare our tool against the refinement checker FDR for CSP and discuss an extension for singleton failure refinement.

关键词： B-method tool support refinement checking model checking animation logic programming constraints

来源：评论

学校读者我要写书评

暂无评论

Exploring long-time response to radiation damage in MgO

引用

NUCLEAR INSTRUMENTS & MEthODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WIth MATERIALS AND ATOMS 2005年第1-4期228卷 260-273页

作者： Uberuaga, BP Smith, R Cleave, AR Henkelman, G Grimes, RW Voter, AF Sickafus, KE Los Alamos Natl Lab Los Alamos NM 87545 USA Loughborough Univ Technol Dept Math Sci Loughborough LE11 3TU Leics England Univ London Imperial Coll Sci Technol & Med Dept Mat London SW7 2BP England

Using a variety of computational modeling and simulation methods, we examine the production and long-time evolution of damage created in irradiated MgO. We find that the damage produced in low energy (order 1 keV) collision cascades typically consists of point defects and small defect clusters. Over long times, interstitials annihilate with vacancies and aggregate with other interstitials, forming larger clusters that exhibit surprising behavior. For example, a sixatom interstitial cluster is found to have extremely high mobility. the implications of highly-mobile large clusters are explored via a rate theory model and comparison to other materials. We conclude that successful modeling of radiation damage evolution in MgO requires explicit treatment of large interstitial clusters. (C) 2004 Elsevier B.V. All rights reserved.

关键词： MgO radiation damage molecular dynamics accelerated molecular dynamics temperature accelerated dynamics molecular statics density functional theory interstitial clusters defect mobility

来源：评论

学校读者我要写书评

暂无评论

Elementary affine logic and the call-by-value lambda calculus 1

引用

7th international conference on Typed Lambda Calculi and Applications, TLCA 2005

作者： Coppola, Paolo Dal Lago, Ugo Ronchi Della Rocca, Simona Dipartimento di Matematica e Informatica Università di Udine via delle Scienze 206 33100 Udine Italy Dipartimento di Scienze dell'Informazione Università di Bologna via Mura Anteo Zamboni 7 40127 Bologna Italy Dipartimento di Informatica Università di Torino corso Svizzera 185 10149 Torino Italy

ISBN: (数字)9783540320142

ISBN: (纸本)9783540255932

the so-called light logics [1,2,3] have been introduced as logical systems enjoying quite remarkable normalization properties. Designing a type assignment system for pure lambda calculus from these logics, however, is problematic, as discussed in [4]. In this paper we show that shifting from usual call-by-name to call-by-value lambda calculus allows regaining strong connections with the underlying logic. this will be done in the context of Elementary Affine Logic (EAL), designing a type system in natural deduction style assigning EAL formulae to lambda terms. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Logic programming

来源：评论

学校读者我要写书评

暂无评论

An application of non-linear programming to train Recurrent Neural Networks in Time Series Prediction problems

An application of non-linear programming to train Recurrent ...

引用

作者： Cuéllar, M.P. Delgado, M. Pegalajar, M.C. Department of Computer Science and Artificial Intelligence E.T.S. Ingeniería Informática Univerity of Granada C/. Pdta Daniel Saucedo Aranda s.n. Granada Spain

ISBN: (纸本)9728865198

Artificial Neural Networks are bioinspired mathematical models that have been widely used to solve many complex problems. However, the training of a Neural Network is a difficult task since the traditional training algorithms may get trapped into local solutions easily. this problem is greater in Recurrent Neural Networks, where the traditional training algorithms sometimes provide unsuitable solutions. Some evolutionary techniques have also been used to improve the training stage, and to overcome such local solutions, but they have the disadvantage that the time taken to train the network is high. the objective of this work is to show that the use of some non-linear programming techniques is a good choice to train a Neural Network, since they may provide suitable solutions quickly. In the experimental section, we apply the models proposed to train an Elman Recurrent Neural Network in real-life Time Series Prediction problems.

关键词： Recurrent neural networks

来源：评论

学校读者我要写书评

暂无评论

Agent-based framework for software on-demand

Agent-based framework for software on-demand

引用

international conference on Advanced Communication Technology (ICACT)

作者： Chang-Hyun Jo Won-Young Kim Jeong-Min Shim Wan Choi California State University Fullerton CA USA Electronics and Telecommnications Research Institute Daejeon South Korea

this paper introduces an agent-based framework and a programming environment for the software on-demand (SOD) service. Streaming is a technology that enables either real-time or on-demand distribution of audio, video, and multimedia contents over networks. Recently streaming technology has been applied onto applications, and many deployment tools for enterprise applications have been developed. ETRI is also planning to provide the software on-demand service using the streaming technology through the Internet. this paper introduces an agent-based framework for the SOD system and presents programming environments for streaming service

关键词： Streaming media Application software Mobile agents programming environments Security Software systems Packaging Video on demand Web and internet services Software packages

来源：评论

学校读者我要写书评

暂无评论

Providing durable, safe, and quiet highways

Providing durable, safe, and quiet highways

引用

作者： Larson, Roger M. Scofield, Larry Sorenson, James Applied Pavement Technology Inc. 7501 Candytuft Court Springfield VA 22153 United States American Concrete Pavement Association 807 W. Keating Ave. Mesa AZ United States Federal Highway Administration 400 7th St. SW Washington DC 20590 United States

ISBN: (纸本)9780984065820

Most pavement design and construction specifications do not adequately define the pavement functional surface characteristics that are important to highway users. the result is that sometimes completed highway projects do not meet user expectations. Currently, most specifications address only smoothness (ride quality), whereas other desirable surface characteristics such as durability, and surface texture [friction (safety) and noise (environment)] are not often specifically addressed. the purpose of this paper is to look primarily at the functional characteristics of paved highway surfaces. First, functional performance will be described. Secondly, the individual surface characteristics affecting functional performance will be discussed with emphasis on pavement texture which has a major effect on friction (safety) and noise (environment). Next, recent innovative techniques and equipment to measure and evaluate these characteristics will be explained. Safety efforts underway both internationally and in the U.S. will be addressed. Finally, examples of the best practices will be described. Consideration of these factors by the engineering profession will help ensure that the highway user expectations are met on completed projects by providing durable, safe and quiet highways.

关键词： Friction

来源：评论

学校读者我要写书评

暂无评论

Mathematical programming evaluation of intrinsic survivability in packet-path networks

Mathematical programming evaluation of intrinsic survivabili...

引用

international conference on Transparent Optical Networks

作者： F.J. Gonzalez-Castano J.C. Burguillo-Rial C. Lopez-Bravo J. Garcia-Haro P. Pavon-Marino Departamento de Ingeniería Telemática Universidad de Vigo Spain Departamento de Tecnologías de la Información y las Comunicaciones Universidad Politécnica de Cartagena Spain

ISBN: (纸本)0780392361

In this paper, we evaluate the intrinsic survivability of packet-path networks such as ORION ones. By intrinsic survivability we refer to the ability to activate packet routing around node/link failures affecting paths. this can be considered as an automatic increase of traffic granularity (path to packet) around the failure. A distinctive feature of our model is that downstream nodes (after the failures) "catch" re-routed packets of the LSPs they recognize, and route them in path mode afterwards.

关键词： Mathematical programming Intelligent networks Telecommunication traffic Optical fiber networks Multiprotocol label switching Routing Traffic control Performance loss Optical packet switching Bandwidth

来源：评论

学校读者我要写书评

暂无评论

A slotted dynamic traffic scheduling algorithm in time-domain wavelength interleaved networks

A slotted dynamic traffic scheduling algorithm in time-domai...

引用

IEEE international conference on Networks

作者： Daojun Xue Yang Qin Chee Kheong Siew School of EEE Nanyang Technological University Singapore

We consider the scheduling problem in a new optical transport network called time-domain wavelength interleaved networks (TWIN). Due to the innovative architecture of TWIN, four issues are essential in the designing of scheduling schemes: there are no transmitting/receiving conflicts; propagation delays are observed; throughput is maximized; queueing delay and delay variance are kept as small as possible. We formulate the scheduling problem into an integer linear programming (ILP) problem and present a novel heuristic algorithm - the destination slot set (DSS) algorithm. We compare the performance of DSS with an existing algorithm in TWIN - dynamic scheduling (DS), and show that while achieving the maximum throughput, DSS introduces much smaller queueing delay and delay variance than DS. We highlight that this is a requisite for providing QoS in TWIN, which was overlooked by previous works. We also show that DSS has a smaller computing complexity than DS, which makes it feasible for real-time scheduling.

关键词： Telecommunication traffic Scheduling algorithm Time domain analysis Decision support systems Propagation delay throughput Traffic control Optical fiber networks Integer linear programming Heuristic algorithms

来源：评论

学校读者我要写书评

暂无评论

Collaborative strategies of partially interacting agents in a partially observable universe

Collaborative strategies of partially interacting agents in ...

引用

international conference on Information Fusion

作者： F. Dambreville Délégation Générale pour l'Armement DGA/CTA/DT/GIP Arcueil France

We are interested in optimizing the strategies of autonomous agents, which are coordinating their actions toward a same objective. Partial observations of the universe and partial communications between the agents are hypothesized. thus, the strategies of the agents are partially independent. this problem is related to the POMDP family. However, our approach is not based on the dynamic programming. In a previous work, it has been shown that the optimal strategies for the POMDP problem could be approximated by dynamic Bayesian networks with input and output (i.e. exchanging information with the universe). A method, based on the cross-entropy, has been implemented for optimizing the parameters of such DBN, relatively to the POMDP problem; as a result the whole method was able to compute a near-optimal solution of the POMDP. this method is applied to our problem of autonomous agents. In this case, the strategy of each agent is modelled by a dynamic Bayesian network. these DBNs are assumed to be disjoint (independence of the agents). However, these DBNs are able to exchange information with the universe and with the communication system.

关键词： Collaboration Dynamic programming Bayesian methods Optimization methods Autonomous agents Hidden Markov models Communication systems Robot kinematics Decision trees

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：