| 公路自然区划地理信息系统优化设计 |
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| 引用本文： | 许金良,牛玉欣,杨宏志,韩跃杰.公路自然区划地理信息系统优化设计[J].长安大学学报(自然科学版),2011(1). |
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| 作者姓名： | 许金良 牛玉欣 杨宏志 韩跃杰 |
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| 作者单位： | 长安大学特殊地区公路工程教育部重点实验室; |
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| 基金项目： | 国家西部交通建设科技项目(200331881236) |
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| 摘 要： | 为了提高公路自然区划的准确性和高效性,对公路自然区划地理信息系统进行优化设计研究。系统优化设计通过选用简单和大容量日志记录相结合的恢复模型加快数据载入速度,采用API函数实现数据的批量拷贝,引入DECODE函数优化SQL语句,建立临时表优化查询缓存,减小了系统的响应时间,提高了I/O和CPU(中央处理器)的反应速度。
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| 关 键 词： | 道路工程 公路 自然区划 地理信息系统 优化设计 |
Optimum design of geographic information system for highway natural regionalization |
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| XU Jin-liang,NIU Yu-xin,YANG Hong-zhi,HAN Yue-jie.Optimum design of geographic information system for highway natural regionalization[J].JOurnal of Chang’an University:Natural Science Edition,2011(1). |
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| Authors: | XU Jin-liang NIU Yu-xin YANG Hong-zhi HAN Yue-jie |
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| Institution: | XU Jin-liang,NIU Yu-xin,YANG Hong-zhi,HAN Yue-jie(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an 710064,Shaanxi,China) |
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| Abstract: | Optimum design of geographic information system for highway natural regionalization is developed in order to improve the accuracy and efficiency of highway natural regionalizing.By choosing the recovery model of simple and bulk-logged,using the API function,the speed of data loading optimized and bulk data copying is significantly improved.By introducing DECODE function to optimize the SQL statement,the temporary table is established to optimize the query cache.It is found that these optimization methods ca... |
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| Keywords: | road engineering highway natural regionalization geographic information system optimum design |
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