检索结果-内蒙古大学图书馆

8th International Symposium on Information and Communication Technologies Applied to Education, SIIE 2006

作者： Martínez-Ortiz, Iván Moreno-Ger, Pablo Sierra, Jose Luis Fernández-Manjón, Baltasar Centro de Estudios Superiores Felipe II Aranjuez Madrid Spain Department of Computer Systems and Programming Universidad Complutense de Madrid Fac. de Informática Madrid28040 Spain

The modelling of the educational processes and their operational support is a key aspect in the construction of more effective e-learning applications. Instructional models are usually described by means of an educational modelling language (EML). The EML used can be one of the available standards (e.g. IMS Learning Design), the customization of a standard to meet a specific application profile, or even a domain-specific EML specifically designed to best fit in the very particular needs of a learning scenario. In this paper we propose , a general authoring and operationalization architecture capable of dealing with all these possibilities in a highly modular and flexible way. We also outline a specific implementation of based on standard XML technologies and in the BPEL4WS workflow management language, and we describe how this implementation can be used to support IMS Learning Design.

关键词： E-learning

来源：评论

学校读者我要写书评

暂无评论

Performance of WLAN and MANET networks for new auto-configured mobile IP agents

Performance of WLAN and MANET networks for new auto-configur...

引用

International Symposium on Telecommunications

作者： G. Amvame-Nze Flavio E. de Deus Roque Lambert C. Jacy Barenco Abbas L. J. Garcia Villalba Electrical Engineering Department University of Brasilia Brasilia Brazil Department of. Computer Systems and Programming Complutense University of Madrid Spain

ISBN: (纸本)9781424436446

This work presents the performance of WLAN and MANET networks using the auto-configuration of Mobile IP Agents Protocol (DRMIPA). This scheme would allow groups of MIP nodes in WLANs or MANETs to enjoy IP mobility at any foreign or local network that doesn't implement MIP. To maintain a failure free MIP network, a passive agent is elected from an active agent if this active agent leaves or ceases its participation from current network. The DRMIPA protocol is implemented in WLAN and MANET. A performance analysis is done using a real world testbed scenario.

关键词： Wireless LAN Mobile ad hoc networks Home automation IP networks Protocols Ad hoc networks Fault tolerance Mobile agents Nominations and elections Proposals

来源：评论

学校读者我要写书评

暂无评论

New Formulations in the Applied Mechanics to Robotics

New Formulations in the Applied Mechanics to Robotics

引用

IEEE International Conference on Automation, Quality and Testing, Robotics, AQTR

作者： I. Negrean I. Vuscan Department of Mechanics and Computer Programming Technical University of Cluj Napoca Cluj-Napoca Romania Department of Manufacturing Engineering Technical University of Cluj Napoca Cluj-Napoca Romania

The algorithm of the dynamic control functions achieves a complex modeling regarding the behavior of any mechanical robot structure. First of all, considering the kinetic links dominated of stiffness hypothesis, on the basis of the new formulations with matrix exponentials, in this paper, the differentials expressions answerable to the forward kinematics of mechanical robot structures were presented. On the basis of these equations, in the following, the generalized dynamics forces were also analyzed for the robots with rigid and elastic structure

关键词： Robots

来源：评论

学校读者我要写书评

暂无评论

Making Slicing Mainstream How can we be Weiser?

Making Slicing Mainstream How can we be Weiser?

引用

Beyond Program Slicing 2005

作者： Kalleberg, Karl Trygve Hall, Tracy Ettinger, Ran Institutt for Informatikk Universitetet i Bergen PB 7800 NorwayN-5020 Norway Department of Computer Science Hertfordshire University HertfordshireAL10 9LB United Kingdom Programming Tools Group Computing Laboratory Oxford University OxfordOX1 3QD United Kingdom

By now, the concept of program slicing has been known in the research community for around 25 years. As a research topic, it has enjoyed a fair share of popularity, evidenced by the number of articles published on the topic following Mark Weiser’s seminal paper. However, outside research circles, program slicing appears to be virtually unknown. In this report, we take the premise that program slicing is both technically relevant, and has a sufficient theoretical foundation, to be applied in practice within the software industry. With this premise in mind, we ask ourselves, "what are the mechanisms by which we as a community could make program slicing mainstream"? © 2006 Dagstuhl Seminar Proceedings. All rights reserved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

InfoShield: a security architecture for protecting information usage in memory

InfoShield: a security architecture for protecting informati...

引用

IEEE Symposium on High-Performance computer Architecture

作者： W. Shi J.B. Fryman G. Gu H.-H.S. Lee Y. Zhang J. Yang School of Electrical and Computer Engineering Georgia Tech College of Computing Georgia Institute of Technology Programming System Lab Corporate Technology Intel Corporation USA Department of Computer Science University of Pittsburgh USA Department of Computer Science and Engineering University of California Riverside USA

Cyber theft is a serious threat to Internet security. It is one of the major security concerns by both network service providers and Internet users. Though sensitive information can be encrypted when stored in non-volatile memory such as hard disks, for many e-commerce and network applications, sensitive information is often stored as plaintext in main memory. Documented and reported exploits facilitate an adversary stealing sensitive information from an application's memory. These exploits include illegitimate memory scan, information theft oriented buffer overflow, invalid pointer manipulation, integer overflow, password stealing Trojans and so forth. Today's computing system and its hardware cannot address these exploits effectively in a coherent way. This paper presents a unified and lightweight solution, called InfoShield that can strengthen application protection against theft of sensitive information such as passwords, encryption keys, and other private data with a minimal performance impact. Unlike prior whole memory encryption and information flow based efforts, InfoShield protects the usage of information. InfoShield ensures that sensitive data are used only as defined by application semantics, preventing misuse of information. Comparing with prior art, InfoShield handles a broader range of information theft scenarios in a unified framework with less overhead. Evaluation using popular network client-server applications shows that InfoShield is sound for practical use and incurs little performance loss because InfoShield only protects absolute, critical sensitive information. Based on the profiling results, only 0.3% of memory accesses and 0.2% of executed codes are affected by InfoShield.

关键词： Information security Protection Cryptography computer security IP networks Web and internet services Nonvolatile memory Hard disks Buffer overflow Hardware

来源：评论

学校读者我要写书评

暂无评论

OpenModelica - A free open-source environment for system modeling, simulation, and teaching

OpenModelica - A free open-source environment for system mod...

引用

IEEE International Conference on computer-Aided Design

作者： Peter Fritzson Peter Aronsson Adrian Pop Hakan Lundvall Kaj Nystrom Levon Saldamli David Broman Anders Sandholm PELAB-Programming Environment Laboratory Department Computer Science Linköping University Linkoping Sweden MathCore Engineering AB Teknikringen 1B SE-583 30 Linköping Sweden EPACT AB Linköping Sweden

Modelica is a modern, strongly typed, declarative, and object-oriented language for modeling and simulation of complex systems. This paper gives a quick overview of some aspects of the OpenModelica environment - an open-source environment for modeling, simulation, and development of Modelica applications. An introduction of the objectives of the environment is given, an overview of the architecture is outlined and a number of examples are illustrated.

关键词： Open source software Education Load modeling Protection Equations Control systems System testing Packaging Connectors

来源：评论

学校读者我要写书评

暂无评论

Shortest path problem on a network with imprecise edge weight

引用

Fuzzy Optimization and Decision Making 2005年第4期4卷 293-312页

作者： Nayeem, Sk.Md. Abu Pal, Madhumangal Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar University Midnapore-721 102 India

A network with its arc lengths as imprecise number, instead of a real number, namely, interval number and triangular fuzzy number is considered here. Existing ideas on addition and comparison between two imprecise numbers of same type are introduced. To obtain a fuzzy shortest path from a source vertex to all other vertices, a common algorithm is developed which works well on both types of imprecise numbers under consideration. In the proposed algorithm, a decision-maker is to negotiate with the obtained fuzzy shortest paths according to his/her view only when the means are same but the widths are different of the obtained paths. Otherwise, a fuzzy optimal path is obtained to which the decision-maker always satisfies with different grades of satisfaction. All pairs fuzzy shortest paths can be found by repeated use of the proposed algorithm. © 2005 Springer Science+Business Media, Inc.

关键词： Fuzzy sets

来源：评论

学校读者我要写书评

暂无评论

Inventory of deteriorating complementary and substitute items with stock dependent demand

引用

American Journal of Mathematical and Management Sciences 2005年第1-2期25卷 83-96页

作者： Maity, K. Maiti, M. Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar University Midnapore - 721 102 India

The optimal production for an inventory control system of deteriorating multi-items where items are of complementary or substitute types is formulated with a resource constraint. Here, it is assumed that substitute products have linearly negative effect on one another's demands and this effect is positive for the complementary items. The effect of an item on the demand of the other item depends on the inventory level of the first item. The rate of deterioration of the items is stock dependent. An item's own demand is also stock dependent, shortages are not allowed, and deteriorated items are salvaged. The total profit which consists of the sales proceeds, production cost, inventory holding cost, salvage value is formulated as a Pontryagin Optimal Control problem for both steady and transient states and evaluated using optimal control theory satisfying the Generalized Legendre condition. The model is formulated in general form for n-items and in particular, is illustrated with two items for some numerical data. The optimum results are presented both in tabular form and graphically. Copyright © 2005 by American Sciences Press, Inc.

关键词： Inventory control

来源：评论

学校读者我要写书评

暂无评论

Numerical approach of multi-objective optimal control problem in imprecise environment

引用

Fuzzy Optimization and Decision Making 2005年第4期4卷 313-330页

作者： Maity, K. Maiti, M. Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar University Midnapore 721 102 India

In this paper, realistic production-inventory models without shortages for deteriorating items with imprecise holding and production costs for optimal production have been formulated. Here, the rate of production is assumed to be a function of time and considered as a control variable. Also the demand is time dependent and known. The imprecise holding and production costs are assumed to be represented by fuzzy numbers which are transformed to corresponding interval numbers. Following interval mathematics, the objective function is changed to respective multi-objective functions and thus the single-objective problem is reduced to a multi-objective decision making(MODM) problem. The MODM problem is then again transformed to a single objective function with the help of weighted sum method and then solved using global criteria method, calculus method, the Kuhn-Tucker conditions and generalized reduced gradient(GRG) technique. The models have been illustrated by numerical data. The optimum results for different objectives are obtained for different types of production function. Numerical values of demand, production function and stock level are presented in both tabular and graphical forms. © 2005 Springer Science+Business Media, Inc.

关键词： Problem solving

来源：评论

学校读者我要写书评

暂无评论

Deleting Outliers in Robust Regression with Mixed Integer programming

引用

Acta Mathematicae Applicatae Sinica 2005年第2期21卷 323-334页

作者： Georgios Zioutas Antonios Avramidis Division of Computational Methods and Computer Programming General Department Faculty of Technology Aristotle University of Thessaloniki 541 24 Thessaloniki GreeceDivision of Computational Methods and Computer Programming General Department Faculty of Technology Aristotle University of Thessaloniki 541 24 Thessaloniki Greece

In robust regression we often have to decide how many are the unusualobservations, which should be removed from the sample in order to obtain better fitting for the restof the observations. Generally, we use the basic principle of LTS, which is to fit the majority ofthe data, identifying as outliers those points that cause the biggest damage to the robust ***, in the LTS regression method the choice of default values for high break down-point affectsseriously the efficiency of the estimator. In the proposed approach we introduce penalty cost fordiscarding an outlier, consequently, the best fit for the majority of the data is obtained bydiscarding only catastrophic observations. This penalty cost is based on robust design weights andhigh break down-point residual scale taken from the LTS estimator. The robust estimation is obtainedby solving a convex quadratic mixed integer programming problem, where in the objective functionthe sum of the squared residuals and penalties for discarding observations is minimized. Theproposed mathematical programming formula is suitable for small-sample data. Moreover, we conduct asimulation study to compare other robust estimators with our approach in terms of their efficiencyand robustness.

关键词： Robust regression quadratic mixed integer programming least trimmedsquares deleting outliers penalty methods

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：