As the increasing popularity and complexity of Web applications and the emergence of their new characteristics, the testing and maintenance of large, complex Web applications are becoming more complex and difficult. W...As the increasing popularity and complexity of Web applications and the emergence of their new characteristics, the testing and maintenance of large, complex Web applications are becoming more complex and difficult. Web applications generally contain lots of pages and are used by enormous users. Statistical testing is an effective way of ensuring their quality. Web usage can be accurately described by Markov chain which has been proved to be an ideal model for software statistical testing. The results of unit testing can be utilized in the latter stages, which is an important strategy for bottom-to-top integration testing, and the other improvement of extended Markov chain model (EMM) is to present the error type vector which is treated as a part of page node. this paper also proposes the algorithm for generating test cases of usage paths. Finally, optional usage reliability evaluation methods and an incremental usability regression testing model for testing and evaluation are presented. Key words statistical testing - evaluation for Web usability - extended Markov chain model (EMM) - Web log mining - reliability evaluation CLC number TP311. 5 Foundation item: Supported by the National Defence Research Project (No. 41315. 9. 2) and National Science and Technology Plan (2001BA102A04-02-03)Biography: MAO Cheng-ying (1978-), male, Ph.D. candidate, research direction: software testing. Research direction: advanced database system, software testing, component technology and data mining.展开更多
提出一种基于判别模型的拼写校正方法.它针对已有拼写校正系统Aspell的输出进行重排序,使用判别模型Ranking SVM来改进其性能.将现今较为成熟的拼写校正技术(包括编辑距离、基于字母的n元语法、发音相似度和噪音信道模型)以特征的形式...提出一种基于判别模型的拼写校正方法.它针对已有拼写校正系统Aspell的输出进行重排序,使用判别模型Ranking SVM来改进其性能.将现今较为成熟的拼写校正技术(包括编辑距离、基于字母的n元语法、发音相似度和噪音信道模型)以特征的形式整合到该模型中来,显著地提高了基准系统Aspell的初始排序质量,同时性能也超过了一些商用系统(如Microsoft Word 2003)的拼写校正模块.此外,还提出了一种在搜索引擎查询日志链中自动抽取拼写校正训练对的方法.基于这种方法训练的模型获得了基于人工标注数据所得结果相近的性能,它们分别将基准系统的错误率降低了32.2%和32.6%.展开更多
文摘As the increasing popularity and complexity of Web applications and the emergence of their new characteristics, the testing and maintenance of large, complex Web applications are becoming more complex and difficult. Web applications generally contain lots of pages and are used by enormous users. Statistical testing is an effective way of ensuring their quality. Web usage can be accurately described by Markov chain which has been proved to be an ideal model for software statistical testing. The results of unit testing can be utilized in the latter stages, which is an important strategy for bottom-to-top integration testing, and the other improvement of extended Markov chain model (EMM) is to present the error type vector which is treated as a part of page node. this paper also proposes the algorithm for generating test cases of usage paths. Finally, optional usage reliability evaluation methods and an incremental usability regression testing model for testing and evaluation are presented. Key words statistical testing - evaluation for Web usability - extended Markov chain model (EMM) - Web log mining - reliability evaluation CLC number TP311. 5 Foundation item: Supported by the National Defence Research Project (No. 41315. 9. 2) and National Science and Technology Plan (2001BA102A04-02-03)Biography: MAO Cheng-ying (1978-), male, Ph.D. candidate, research direction: software testing. Research direction: advanced database system, software testing, component technology and data mining.
基金Supported by the National Natural Science Foundation of China under Grant No.60603027 (国家自然科学基金)the Science-Technology Development Project of Tianjin of China under Grant No.04310941R (天津市科技发展计划)the Applied Basic Research Project of Tianjin of China under Grant No.05YFJMJC11700 (天津市应用基础研究计划)
文摘提出一种基于判别模型的拼写校正方法.它针对已有拼写校正系统Aspell的输出进行重排序,使用判别模型Ranking SVM来改进其性能.将现今较为成熟的拼写校正技术(包括编辑距离、基于字母的n元语法、发音相似度和噪音信道模型)以特征的形式整合到该模型中来,显著地提高了基准系统Aspell的初始排序质量,同时性能也超过了一些商用系统(如Microsoft Word 2003)的拼写校正模块.此外,还提出了一种在搜索引擎查询日志链中自动抽取拼写校正训练对的方法.基于这种方法训练的模型获得了基于人工标注数据所得结果相近的性能,它们分别将基准系统的错误率降低了32.2%和32.6%.
