Catálogo de publicaciones - libros

How to discover resource rapidly and exactly in distributed and heterogeneous grid environment is a key problem that affects grid computing performance. In this paper, the P2P method is used to improve scalability of resource discovery mechanism, and a decentralized resource discovery method with well scalability is presented, this method uses binary tree to manage data, each node in grid is responsible for managing a part of resource information. Experimental result shows that the method presented in this paper can resolve many problems that exist in centralized mechanism, such as poor scalability, heavy load on resource information server and single point failure.

As the complexity of application system for enterprises, an important challenge is to dynamically schedule and integrate the heterogeneous and distributed services or activities to work cooperatively and efficiently. An effective technology to resolve the problem is grid service. A grid service built on both grid computing and web services technologies is an extended Web service. An application system for enterprises is a grid service composition that consists of a collection of grid services related by data and control flow. Therefore, there is a need for modeling and analyzing techniques and tools for reliable and effective grid service composition. The Petri net based method is an idea approach. In this paper, we use a colored dynamic timed Petri net (CDTPN) to model the grid service composition. The definition of CDTPN for grid service and an algorithm to construct a composite service are proposed. We give a definition of reachable service graph and an algorithm for constructing the reachable service graph of CDTPN. Finally, we discuss the correctness and effectiveness of the grid service composition by analyzing the reachable service graph.

Collaborative team members usually come from diverse disciplines; their demands for knowledge are also different from each other. This paper is mainly concerned with how to capturing designers’ knowledge demands in collaborative team. With the view from workflow, designers’ knowledge demand is modeled from three aspects, members, roles, and tasks’ requirements for knowledge. Based on the model of knowledge demand, some intelligent mining methods are proposed so that designers’ knowledge demand could be derived automatically. With the knowledge demand model, a knowledge supply system could be developed to realize: knowledge within an appropriate domain could be delivered to the proper user among the collaborative team.

In this paper, we introduce a new cooperative design and visualization environment, called “Integrare”, which supports designers and developers in building dependable, component-based systems using a new behavior-oriented design method. This method has advantages in terms of its abilities to manage complexity, find defects and make checks of dependability. The environment integrates and unifies several tools that support multiple phases of the design process, allowing them to interact and exchange information, as well as providing efficient editing capabilities. It can help formalize individual natural language functional requirements as Behavior Trees. These trees can be composed to create an integrated tree-like view of all the formalized requirements. The environment manages complexity by allowing multiple users to work independently on requirements translation and tree editing in a collaborative mode. Once a design is constructed from the requirements, it can be visually simulated with respect to an underlying operational semantics, and formally verified by way of a model checker.

This paper is focused on differential conversion, which is a new approach to data transformation between different software systems. The strategy of differential conversion, which is built on a log of changes and identifier mapping, was introduced in CDVE 2006 in a purely theoretical paper entitled . A specific case study of differential conversion in use is elaborated in this text. It is about an intelligent bi-directional transformation between DWG and SVG. DWG is a proprietary CAD-format of the AutoCAD system, whereas SVG is an open, generic graphics format, based on XML. The implemented transformation allows usage of a model created in a CAD-system within a cooperative design intended for non-CAD users. It is useful not only for reading, but even for writing into the model and modifying it. Any changes made are returned back to the original model. The following case exemplifies the previously discussed strategy. For example, a project submitter, or another party in the review process, can use a normal, generic SVG editor for writing comments and proposals into the model. A solver can transform them back into the CAD-model, without other entities in the model being damaged. This case study describes differential export and import tools and takes note of the particular solutions of the log of changes and identifier mapping problems. It also describes the relationship to the original differential conversion proposal, discusses the particular implementation, and again generalizes into some for differential conversion implementation projects in the conclusion.

Version control is the prerequisite of collaborative product development environment, which, in its turn, has attracted increasing attention of CAD/CAM engineers. We aim to present our research results on a strategy of supporting evolution of versions in a collaborative environment. The strategy we provide is consists of a functional model which make application developing more easier, a deployment model in which a Version Management Unit is the deploying cell and a communication agent is included to exchange version information, a storage model which support that version information is saved in space of personal, group or global respectively. The topics discussed also in this paper are definition of version status, the transform of version status, the storage location of version and corresponding version operations.

Semantic Web Services are the key technology providing services for the users’ convenience in the semantic web environment. Many companies in various fields are researching and developing languages for constructing Semantic Web Services such as DAML-S, WSDL, X-LANG and BPEL4WS. DAML-S is a method that accesses the existing Web Service method from a semantic web environment. However, the current Semantic Web Services Discovery System does not provide sufficient processing of quality factors (performance, accessibility, availability, reliability and transaction) nor reliable and accurate service results desired by the user through a UDDI search method. The present study analyzes the disadvantages of the current web services and suggests a Semantic Web Services Discovery System based on QoS applying semantic web technologies as a solution to the problems. The suggested system provides a UDDI and DAML-S based discovery engine to allow efficient web service discovery and composition.

As digital libraries become more popular, information and knowledge overload has become a pressing yet required literature searching problem. Problems with searching in digital libraries will become more complex as the amount of information/knowledge increases. Traditional digital libraries often index words and documents while learners think in terms of topics and subjects. As a result, learners cannot determine how well a particular topic and/or subject is covered, or what types of search methods will provide the required information and knowledge without problems. In order to increase the efficiency and quality of the Brita in PuBs project’s activities, an Intelligent Library and Tutoring System for the Brita in PuBs project (ILTS-BP) was developed. ILTS-BP has the ability to personalize, maximize reuse, index, analyse and integrate valuable information and knowledge from a wide selection of existing sources. Also, the authors have integrated ILTS-BP with a Voice Stress Analyser Subsystem. ILTS-BP is briefly analysed in this paper.

Under collaborative environment based on PDM, the coupling of information between PDM and QIMS makes the development of QIMS complicated. During constructing cooperative circumstance, the development of QIMS can be simplified through fusing rules of quality control into the processes managed by PDM. On the other hand, since the joint model of processes managed by PDM is equivalent to the virtual product model in the collaborative environment, QIMS can also reach quality objectives of enterprise by controlling the quality view of joint model. On the basis of the quality view, an integration model between QIMS and PDM is designed to achieve the combination between quality management and process management by information integration and interface.

To meet the challenges of geographically and logically distributed development processes. Manufacturing resources have to be encapsulated into services. The paper presents an extensible resource encapsulation framework and provides an approach to grid-enable manufacturing resources following Web Service Resource Framework (WSRF) specification which can make them offer their services and functionality in grid environment. The framework includes a Resource Container Factory Service and many Resource Container Instance Services. The same kinds of resources are deployed in one resource container instance. The encapsulation framework has many advantages such as extensible, plug-and-play deployment, automatic encapsulating and manageable. The paper presents the design principle of the resource encapsulation framework. One kind of resource container-resource container for legacy binary codes is introduced as an example in this paper, which can cast legacy binary codes into web services. At last, we give a use case to validate our method and put forward the future work.