In application scope, GIS serves for the department at early stage, and later for the government application, the local application, the national application, even global application. "The Digital Earth" also is brought up on the bases of three essential spatial information technologies\' (GIS, GPS, RS) development and the integration.
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Genetic Algorithms is used in solving the mathematical model, it can obtain the global optimum even if there exists local optimums, and enlarge the application range of Fuzzy Physical Programming.
利用遗传算法求解数学模型，解决了最终优化目标可能存在多个局部最优解的问题，拓宽了模糊物理规划的应用范围。
Even for a readonly application a global context is not a good choice because you probably want fresh data each time you query the application.
即使是一个只读的应用程序在全球范围内是不是一个好的选择，因为你可能每次都希望新的数据你查询应用程序。
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