The popular search engines can no longer satisfy the need for searching information on the Internet.The second generation search engines are coming into our field of vision.They have brought us new hope and pleasure i...The popular search engines can no longer satisfy the need for searching information on the Internet.The second generation search engines are coming into our field of vision.They have brought us new hope and pleasure in search of information on the Internet with their classification system,technical innovation and advantages in special technical spheres.This paper analyzes some representative search engines and their technical connotations.展开更多
As novelty check plays an important role in scientific and technical management,the quality of novelty check itself is being paid more and more attention to.Based on a brief analysis of the factors that affect novelty...As novelty check plays an important role in scientific and technical management,the quality of novelty check itself is being paid more and more attention to.Based on a brief analysis of the factors that affect novelty check quality,the paper introduces the practice of Tsinghua Novelty Check Station in improving the novelty check quality,including working flow,retrieval methods,utilization of Internet resources,the quality of novelty checker,cooperation with clients,etc.展开更多
For current service-oriented applications, individual web service usually cannot meet the requirements arising from real world applications, so it is necessary to combine the functionalities of different web services ...For current service-oriented applications, individual web service usually cannot meet the requirements arising from real world applications, so it is necessary to combine the functionalities of different web services to obtain a composite service in response to users＇ service requests. In order to address the problem of web service composition, this paper proposes an efficient approach to composing basic services in case no any individual service can fully satisfy users＇ requests. Compared with the general strategies adopted in most previously proposed approaches where only the best composition solution is produced, the QoS-aware service composition approach is given and top k solutions in the framework are provided, rather than focusing on obtaining the best composition solution, since the presented approach allows more candidates that are likely to meet the requirements of the users. The approach is based on a succinct binary tree data structure, and a system,named ATC （Approach to Top-k Composite services retrieval） system is implemented. In ATC, Qos is taken into account for composite service, and a heuristic-based search method is proposed to retrieve top k composite service. Some extensive experiments are designed and two web service benchmarks are used for performance study. The experimental results snow that the proposed approach can assure high precision and efficiency for composite service search.展开更多
文摘The popular search engines can no longer satisfy the need for searching information on the Internet.The second generation search engines are coming into our field of vision.They have brought us new hope and pleasure in search of information on the Internet with their classification system,technical innovation and advantages in special technical spheres.This paper analyzes some representative search engines and their technical connotations.
文摘As novelty check plays an important role in scientific and technical management,the quality of novelty check itself is being paid more and more attention to.Based on a brief analysis of the factors that affect novelty check quality,the paper introduces the practice of Tsinghua Novelty Check Station in improving the novelty check quality,including working flow,retrieval methods,utilization of Internet resources,the quality of novelty checker,cooperation with clients,etc.
文摘For current service-oriented applications, individual web service usually cannot meet the requirements arising from real world applications, so it is necessary to combine the functionalities of different web services to obtain a composite service in response to users＇ service requests. In order to address the problem of web service composition, this paper proposes an efficient approach to composing basic services in case no any individual service can fully satisfy users＇ requests. Compared with the general strategies adopted in most previously proposed approaches where only the best composition solution is produced, the QoS-aware service composition approach is given and top k solutions in the framework are provided, rather than focusing on obtaining the best composition solution, since the presented approach allows more candidates that are likely to meet the requirements of the users. The approach is based on a succinct binary tree data structure, and a system,named ATC （Approach to Top-k Composite services retrieval） system is implemented. In ATC, Qos is taken into account for composite service, and a heuristic-based search method is proposed to retrieve top k composite service. Some extensive experiments are designed and two web service benchmarks are used for performance study. The experimental results snow that the proposed approach can assure high precision and efficiency for composite service search.
