Yunjiao Xue

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Simulation for wireless sensor networks has become a challenging exercise due to the hardware design, energy constraints, and deployment of large number of nodes. NS-2 has been widely used in network simulations but does not perform well for wireless sensor networks. This paper provides a comprehensive analysis of the NS-2 simulator based on performance(More)
Software metrics is one of the most active research areas of software engineering. In this paper, a process model for software process metrics is proposed, which defines the roles, activities and related supporting tools and methods for the implementation of software process metrics, and gives an emphasis on the description of the goals, tasks and methods(More)
This paper extends the classical tree similarity measuring method and proposes a definition for cost of tree transformation operations based on the importance of each concept in the entire concept structure and similarity between individual concepts in a knowledge context. We apply the proposed method to ontology comparison where different ontologies for(More)
Spoken language education plays an important role in modern language courses. Computer-based spoken language test systems provide a convenient, efficient and reliable approach to test and assess individual spoken abilities. But most E-Learning systems concern more about written training and test. Existing models and systems do not completely meet special(More)
In collaborative enterprise networks, semantic heterogeneity is an important factor that hinders collaboration of various information systems. Ontology-driven semantic integration is an important category of solutions for the semantic integration problem. However, in many domains, there are no explicit and formal ontologies available. This paper proposes to(More)
The application of component repository has become more and more popular in the practice of component-based software development. Most of the repositories are physically isolated and vary in the classification and specification mechanisms, forming a distributed and heterogeneous network, which hinders the share and reusability of component resource.(More)
As an important part of service-oriented software engineering, service retrieval receives much attention from industry and academia, but which still leaves much to be expected: how the truth of the advertisement of service can be assured; how incomplete retrieval requirement can be dealt with; how a service fit a user's need, existing methods based on(More)