There are two service selection strategies in dynamic service composition, i.e., global strategy and local strategy. The existed global service selection algorithms, due to insufficiently show users’ partiality and feature of the service, is unfavorable to encourage the service provider to optimize the service quality to some extent. In this paper, an ordinary utility function is used as a nume...

Nowadays, agent-based service-oriented systems have been widely applied in many complex domains such as e-markets, grid systems, e-governments and service-oriented software systems, cross Internet and organizations. In this kind of service-oriented multi-agent systems, service providers (agents) and service consumers (agents) are autonomous entities and can enter and leave environments freely. ...

In addition to functional aspects web services also expose non-functional properties, which describe how the offered functionalities are delivered. In service-oriented systems with real business settings, the non-functional properties play an important role in the service life cycle, including discovery, selection and operation of services. This PhD thesis focuses on two research challenges rel...

Building applications dynamically from individual services offered by different organizations is one of the opportunities that Service-oriented Architecture (SoA) provides. With increasing number of providers, there is a choice among several functionally equivalent services resulting in a need to select the most appropriate ones in terms of Quality of Service (QoS) and transactional properties....

Nowadays, service compositions are increasingly used to execute business processes. During the execution of a service composition, a service failure leads to a necessary re-planning. Due to such runtime events, the ex-post realized Quality of Service (QoS) values and thus the realized utility of an executed service composition may be significantly lower than the ex-ante computed one. The presen...

With the increasing deployment of functionally similar web services by different service providers, nonfunctional aspects, which are often referred to Quality of Service (QoS), play a vital role in ranking web services. Various users may have different priorities of QoS attributes. However, ordinary users are lacking in the ability to map their plain requirements to the obscure technical QoS me...

Due to the dynamic infrastructure in Mobile Ad-hoc Networks (MANET), supporting a reliable and timely service access is one of the main requirements of applications deployed over MANETs. In this paper, a reliability-aware service selection scheme is proposed in which a client node collects and ranks the available service providers based on their estimated response time and reliability. However,...

Selecting most appropriate service among the available services for performing an activity is one of the important activities of semantic web service composition process. The paper presents a cognitive parameters based model for rating the different service providers based on their cognitive parameters like trustworthiness, capability, commitment, intention, desire, reputation etc. The model co...