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长沙城市土地扩张模型及其应用 总被引：2，自引：0，他引：2
Although traditional urban expansion simulation models can simulate dynamic features, these models fail to address complex
changes produced by different agents’ behaviors. The paper has built up a set of spatial-temporal land resource allocation
rules and developed a dynamic urban expansion model based on a multi-agent system, which can simulate the interaction among
different agents, such as residents, peasants, and governments. This model is applied to simulate urban expansion process
taking Changsha City, in China as a study area. The results show that this model can not only reflect basic characteristics
of urban expansion, but also help explain the reasons for urban expansion process and understand the effect of agents’ behavior
on the expansion process, and provide insights into the causing factors behind the expansion. In addition, in contrast to
simulation results with land use classification map from remote sensing images, the precision of the simulation reached over
68% with higher precision than cellular automata model according to the cell-by-cell comparison. The results suggest that
the model can help to provide land use decision making support to government and urban planners. 相似文献
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珠江口黄茅海冬季海洋生态环境特征 总被引：1，自引：0，他引：1
根据2007年12月在珠江口西部黄茅海的调查采样,对该海域的叶绿素a、初级生产力(C)、浮游动、植物进行了初步的研究.分析了浮游动、植物的种类组成、群落结构、数量和生物景等.结果表明,叶绿素a浓度和初级生产力(C)均值分别为2.75 mg/m3和61.16 mg/m2·d.浮游植物共有43种,以硅藻为主,绝对优势种为颗粒直链藻,平均细胞丰度为20.1×104 cell/m3,以近海广布种为主要类群,多样性指数和均匀度均值分别为2.59和0.73.浮游动物共有57种,暖水种沿岸类群种类占大多数,以丹氏纺缍水蚤为绝对优势种,平均丰度和牛物量分别1 850 ing/m3和679.74 mg/m3,多样性指数和均匀度均值分别为2.92和0.63. 相似文献
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