【作者】 蔡勇智；

【导师】 傅清祥；

【作者基本信息】 福州大学 ， 计算机应用技术， 2006， 硕士

【摘要】 随着移动通信和搜索引擎的快速发展,移动搜索越来越受人们的关注。它将移动通信和搜索引擎有机的结合起来,使得手机用户能够在任何时间、任何地点对互联网进行搜索并获取自己所需的信息。因此,移动搜索系统的开发具有重要的实际意义和广阔的应用前景。本文从实际应用的角度出发,根据移动搜索系统的特殊性,选择系统的服务方式,提出我们所开发的SMSBMS系统的服务定位——为移动用户提供简短信息的检索服务、优化高频查询的服务质量,同时对SMSBMS系统进行需求分析。针对SMSBMS系统的服务定位和需求分析,我们对系统进行了整体结构设计,把它划分为五个模块。其中(1)元搜索引擎模块用来获取系统数据。它使用基于遗传算法的调度策略提高系统数据源的质量。(2)本地缓存模块用来管理高频查询词对应的网页快照内容,以降低系统的复杂度和减少系统所需的存储空间,同时使用高速缓存来提高检索速度。(3)中文分词模块用来支持系统的文本分词预处理操作。它使用基于HMM模型的歧义消除算法来提高分词预处理的切分精度。(4)检索模块用来响应用户的查询请求。它利用简单灵活的聚类/分类算法来优化系统的搜索服务。(5)短信接口模块用来与短信网关进行数据通信。它遵循的通信协议是CMPP3.0。此外,我们还根据各模块功能和实现技术的要求,设计了SMSBMS系统需要的数据库及相关的信息表。最后,我们在PC机上实现了SMSBMS系统的上述设计。模拟测试的结果表明系统能够快速有效地为移动用户提供简短信息检索服务,基本上达到预期的目标。更多还原

【Abstract】 With the fast development of mobile communication and search engine, mobile search attracts more and more attention. It combines mobile communication technology with search engine and enables mobile phone users to search the Internet and obtain relevant information at any time and any place they want. Thus, mobile search do has important worth of application and significant applied space.This paper focuses on real use. According to the particularity of mobile search system, it chooses a suitable mode to show the result for mobile users. Our SMSBMS system’s service orientation is: providing short information retrieval for mobile users and optimizing the service of frequent search. Then we finish the request analysis of SMSBMS system.According to the service orientation and request analysis of the SMSBMS system, we designed the whole structure of the system and divide the system into five modules: (1) the meta search engine module to obtains system data. it adopts genetic algorithm in schedule strategy to improve the quality of system data source, (2) the local store module to manage the web snapshot content of frequent words, this can reduce the system complexity, saves store space. Meanwhile it accelerates the search process by cache.(3) the Chinese word segmentation module to support the text segmentation of system, it uses HMM-based disambiguation algorithm to improve the accuracy of the word segmentation.(4) the search module to response the users’search request, it applies an efficient clustering/classification algorithm to optimize the search service quality. (5) the communication interface module to transfer data with short message gateway. It follows to the protocol of CMPP3.0. Besides, according to the request of modules’function and real technique, we gave the design of relevant tables’structure of SMSBMS system.At last, we implement those designs on PC. The results of simulate test showed that: the SMSBMS system can quickly and efficiently provides short information retrieval service for the mobile users, satisfied the expectation.更多还原