In recent years, the number of Web services has increased significantly. Web service discovery has drawn much attention with the development of Web service applications and big data analysis. Under this circumstance, ...In recent years, the number of Web services has increased significantly. Web service discovery has drawn much attention with the development of Web service applications and big data analysis. Under this circumstance, traditional Web service discovery strategies cannot adequately meet high user requirements due to the efficiency and precision of service discovery is low. In order to improve the accuracy and efficiency of service discovery, a user requirement oriented Web service discovery approach based on Petri nets is proposed in this study. A data preprocessing strategy of Web service is first designed. Then, a service clustering method is proposed based on Petri nets, which can conduct service cluster head generation, service cluster composition, and service discovery. The proposed method utilizes a superior data preprocessing method. Using simulation experiments,the efficiency and precision of Web service discovery are illustrated. Finally, the application value of the approach on real Web service is discussed.展开更多
目的本研究介绍一种新的保头手术:钛网伞状加股方肌骨柱移植治疗酒精性股骨头坏死,并与原带股方肌蒂骨移植的方法进行比较来评价其近期治疗效果。方法 2008年1月至2008年12月,郑州大学第一附属医院设计应用股方肌蒂骨柱加钛网伞状支撑...目的本研究介绍一种新的保头手术:钛网伞状加股方肌骨柱移植治疗酒精性股骨头坏死,并与原带股方肌蒂骨移植的方法进行比较来评价其近期治疗效果。方法 2008年1月至2008年12月,郑州大学第一附属医院设计应用股方肌蒂骨柱加钛网伞状支撑手术治疗股骨头坏死10例(12髋)(A组)。平均年龄30.1(21～42)岁。ARCO II B期2髋,ⅡC期10髋。同期采用单纯股方肌蒂骨瓣移植的手术方法治疗股骨头坏死12例(16髋)(B组),平均年龄29.8(20～41)岁。ARCO II B期6髋,ⅡC期10髋。所有病例均为酒精性股骨头坏死。术后定期随访患者,参照百分法进行疗效评价,采用非参数秩和检验比较A和B组间临床和影像学间的差异。结果随访时间A组平均29.2个月,B组平均28.5个月。A和B组疼痛和功能均改善明显。至最后随访时,A组优11髋,良1髋,B组优14髋,良2髋。两组间的临床和影像学结果比较无统计学差异。结论股方肌蒂骨柱加钛网伞状支撑术治疗ARCO IIC期股骨头坏死的近期效果良好,远期疗效有待进一步观察。展开更多
基金supported by the National Natural Science Foundation of China(61170078,61472228)the Science and Technology Development Plan of Shandong Province(2012G0020120)the Science and Technology Innovation Project of Shandong University of Science and Technology(SDKDYC17022)
文摘In recent years, the number of Web services has increased significantly. Web service discovery has drawn much attention with the development of Web service applications and big data analysis. Under this circumstance, traditional Web service discovery strategies cannot adequately meet high user requirements due to the efficiency and precision of service discovery is low. In order to improve the accuracy and efficiency of service discovery, a user requirement oriented Web service discovery approach based on Petri nets is proposed in this study. A data preprocessing strategy of Web service is first designed. Then, a service clustering method is proposed based on Petri nets, which can conduct service cluster head generation, service cluster composition, and service discovery. The proposed method utilizes a superior data preprocessing method. Using simulation experiments,the efficiency and precision of Web service discovery are illustrated. Finally, the application value of the approach on real Web service is discussed.
文摘目的本研究介绍一种新的保头手术:钛网伞状加股方肌骨柱移植治疗酒精性股骨头坏死,并与原带股方肌蒂骨移植的方法进行比较来评价其近期治疗效果。方法 2008年1月至2008年12月,郑州大学第一附属医院设计应用股方肌蒂骨柱加钛网伞状支撑手术治疗股骨头坏死10例(12髋)(A组)。平均年龄30.1(21～42)岁。ARCO II B期2髋,ⅡC期10髋。同期采用单纯股方肌蒂骨瓣移植的手术方法治疗股骨头坏死12例(16髋)(B组),平均年龄29.8(20～41)岁。ARCO II B期6髋,ⅡC期10髋。所有病例均为酒精性股骨头坏死。术后定期随访患者,参照百分法进行疗效评价,采用非参数秩和检验比较A和B组间临床和影像学间的差异。结果随访时间A组平均29.2个月,B组平均28.5个月。A和B组疼痛和功能均改善明显。至最后随访时,A组优11髋,良1髋,B组优14髋,良2髋。两组间的临床和影像学结果比较无统计学差异。结论股方肌蒂骨柱加钛网伞状支撑术治疗ARCO IIC期股骨头坏死的近期效果良好,远期疗效有待进一步观察。
