Electronic navigation system information searching method and device thereof
A technology of information retrieval and electronic navigation, applied in road network navigators, electronic digital data processing, special data processing applications, etc., can solve the problems of inability to retrieve and low retrieval accuracy, and achieve the goal of improving retrieval accuracy and shortening response time Effect
Active Publication Date: 2009-11-25
ALIBABA (CHINA) CO LTD
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[0003] The shortcoming of prior art is: owing to adopting to find out the field that matches search word in database, just all characters of search word are used as a keyword to match, for example: user input: "Chinese Academy of Sciences National Planning Commission Geography The search term "Institute" is used to find a field that is exactly the same as "Institute of Geography, National Planning Commission, Chinese Academy of Sciences" in the database. If the user does not remember the full name, but only a few words such as "National Planning Commission", then the existing technology cannot be retrieved, so the existing technology retrieval accuracy is low
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[0038] Such as figure 1 As shown, the information retrieval method of the electronic navigation system of the present invention comprises the following steps:
[0039] Step 1) receiving the search term;
[0040] Step 2) classifying the search terms, and performing word segmentation to obtain some lexical units;
[0041] Step 3) Retrieve the field matched with the lexical element in the navigation electronic map database;
[0042] Step 4) Display information related to the field.
[0043] The word segmentation in the above refers to the process of recombining continuous word sequences into word sequences according to certain specifications. For example: "No. 33, Xueyuan Road, Haidian District, Beijing", this Chinese character string can be processed by word segmentation to obtain four word segmentation units of "Beijing", "Haidian District", "Xueyuan Road" and "No. 33", also known as four lemmas, that is, the search term "No. 33 Xueyuan Road, Haidian District, Beijing" is d...
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The invention discloses an information retrieval method of an electronic navigation system, which comprises the steps of receiving a search word; performing word segmentation processing on the search word to obtain several word elements; retrieving a field matching the word element in a navigation electronic map database; displaying information about the field. Correspondingly, the present invention also discloses an information retrieval device for an electronic navigation system, including an input unit for receiving search terms; a word segmentation unit for performing word segmentation processing on the search terms received by the input unit to obtain several word units; a matching unit The method is used to find out the field matching the search word or the lexical element in the navigation electronic map database; the display unit is used to display information related to the field found by the matching unit. By adopting the technical solution of the invention, the required information can be retrieved without inputting the full name, thereby greatly improving the response time and precision of the retrieval.
Description
technical field [0001] The invention relates to the field of electronic navigation, in particular to an information retrieval method and device for an electronic navigation system. Background technique [0002] Existing vehicle-mounted satellite navigation systems generally provide an information retrieval method in the navigation electronic map database, including receiving input search terms; finding a field matching the search term in the navigation electronic map database; Related information. The navigation electronic map database is used to store electronic map information, such as names and coordinates of places and so on. [0003] The shortcoming of prior art is: owing to adopting to find out the field that matches search word in database, just all characters of search word are used as a keyword to match, for example: user input: "Chinese Academy of Sciences National Planning Commission Geography The search term "Institute" is used to find a field that is exactly t...
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IPC IPC(8): G01C21/26G01C21/34G01C21/36G06F17/30
Inventor 姜德荣孙竹平
Owner ALIBABA (CHINA) CO LTD