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Web service composition is aimed to compose new web service form to respond the goal of business process. The web service selection brings to consider accurate and reliability composition. Mostly a web service is exist tested quality of service (QoS) that is called non-functional testing described time, availability and cost. However, the web services composition need to meet the business requirement...
Web service selection is a key step to construct a Web service composition system. For each system function, a suitable Web service must be selected from many candidate component services, respectively. However, when there exist complex dependency relationships between component services, it is difficult to make global service selections without any selection conflict. Therefore, we present a conflict-free...
Service-oriented architecture implemented by Web Services is one of the most popular and promising software development paradigm that has brought some challenging research issues today. One of the most important issues is how to automate web service composition at design phase. Currently, there are many researchers concentrating on service composition problem that can be partitioned into three parts,...
Service Composition becomes the most interesting challenges in the Web services area. In this paper, the Quality of Service (QoS)-aware composition of Web Services is discussed. In this paper, we describe the web services composition process model with a directed graph, and simplexes the model by converting all connections into sequence ones. At last, an adaptive genetic algorithm is prompted to gain...
In service oriented application, value-added service is composed of some component services which are selected from candidate services. However, in the current service selection models, services in the composite service are independent from each other. In fact, there are relations (e.g. data interaction, condition dependency) between them. Both QoS and service relation should be regarded as criterions...
This paper presents a model of a web service composing based on particle swarm to resolve dynamic Web services selection with QoS global optimal in Web services composition. It can dynamically select and bind the best suitable Web service to meet the requirement of different users. The essence of the model is that the problem of dynamic Web Service selection with QoS global optimal is transformed...
The discrete particle swarm optimization (DTSO) has many merits, for example simple, rapid convergence speed. This paper proposes an approach for web services composition based on quality of service (QoS) and DTSO. In the case of lots of web services, this approach has an obvious effect. The simulation results comparing with genetic algorithms (GAs) show that it can produce better results.
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