【Key words】 Complexity System； Artificial Life； Cellular Automata； Genetic Algorithm； Particle Swarm Optimization； Artificial Immune System； Ant Algorithm； Complex Adaptive System； Sites Finding of firehouse； Urban Influence Regions；
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urban economic influence regions 城市经济影响区域
The work to define spatial relationship among urban economic influence regions is a quite difficult issue, but an important job to urban geography and urban planning.
确定城市经济影响区域的空间组织是一项十分复杂的工作，在区域规划和城市规划中有着重要的理论和实际意义。
For years plenty of farmland is occupied in the regions between cities and countryside under the influence of regional conditions, differential land benefit and urban economic radiation.
受区位条件、土地级差收益和城市经济辐射的影响，多年以来城乡交错地带耕地被大量征占。
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