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The classic requirement engineering provides limited technology and inefficient methods for requirements evolution, which leads to great restriction on finish the task of requirements evolution with high-efficiency and high-quality. For resolving above problem, this paper presents a reflective requirements specification for requirements evolution. The reflective requirements specification divides...
Semantic Web Service technology provides a strong support for automation software development based on Web service. By analyzing the existing description models and methods of semantic Web service, a Semantic Web Service Description Model (WSDM4S) and its formal description based on SHOIN+(D) are proposed, which attempt to offer an effective model for description, publication, discovery, composition,...
In recent years, semantic Web service technology has gradually become the hot issue of academia and industry, for it can annotate Web service with semantic information to realize the automatic discovery, automatic composition and invocation. However, nowadays there is lack of ontology used to describe the semantic information of Web service directly, which results in the no basis and hard operation...
A method of video stream evaluation and test performance based on Ethernet-PON (passive optical network) was proposed. The IP-based video service or so called IPTV has emerged as the most promising network technology and its QoS (quality of service) has becoming a key concern in access network. The paper gives the performance evaluation of unicast and multicast video stream with different flux. Detailed...
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