Chinese Automatic Segmentation Research And Application In Location Based Services

Location Based Services is defined as services through mobile terminals and mobile network, mobile users to determine the actual location, thus providing users with the necessary location information-related services. This is the use of user location information of value-added services of mobile communications and navigation services in the form of integration.Chinese automatic segmentation technology was proposed in the 20th century in the early 1980s, Chinese information processing field. It can be divided into mechanical and non-mechanical segmentation methods. By word-based string matching principles, the mechanical method is easy to implement. In accordance with the direction of harvesting string, mechanical methods can be divided into sub-term positive match and the reverse match; According to match each priority consideration long-term or short-term priority. Mechanical methods can be divided into sub-term matching the largest and smallest matching; According to reconsider resection matching string of unsuccessful strategies, mechanical methods can be divided into sub-term growth and reduce the Law on the word. One of the biggest matches, the minimum matching and word-by-word traversing method was considered essential for Chinese word segmentation, traversing law is not by words but practical. The other segmentation methods are in the course of the segmentation technique but not purely mechanical sense Word. The non-mechanical method includes expert system and neural network method. Ambiguity in the field of segmentation algorithm is a hard nut to crack. In automatic segmentation process it is difficult to separate the inevitable ambiguities arise. The main reason for the ambiguity: First, automatically by a computer breakdown of the word unique interpretations; Second, by the ambiguity in natural language caused a discrepancy; Third, Due to the size of sub-word thesaurus caused a discrepancy. From constitute a form of a discrepancy segmentation field is divided into sub-fields all wrong intersection justice portfolio and multi-segmentation ambiguityfield. Results from segmentation, segmentation ambiguity field can be divided into two types of real ambiguity and ambiguities. Just the knowledge from all levels of classification differences can be divided into: Ambiguity field ambiguous grammar, semantics and pragmatics ambiguous interpretations. At present, there are several well-known colleges and universities have developed their own segmentation system. Segmentation and the speed and accuracy of the segmentation have reached a certain requirements.The China Telecom in Zhejiang 114 numbers super searches service platform is the map inquiry system which the net user provides for the Zhejiang Telecom. In the platform, we need to address stored in the database are transformed into longitude and latitude to map out its location on a map. The Chinese address transformation in this paper refers to Chinese address are transformed into longitude and latitude for satisfying the function demand of the super search service platform. As a result of people's many written habits, the Chinese address appearance form is complex. But there is a higher frequency of certain key words. To use these keywords as segmentation, the initial address segmentation may be completed. With the address segmentation results, we can be more accurate to search out the latitude and longitude information retrieve with addresses in the longitude and latitude information database. By calculating the corresponding address and the approximate longitude and latitude come.