计算的复杂性理论

Land use type is the outcome of duple influence of nature and human activity, which possessing scrambling, relative instability and complexity, and it can be discussed by fractal theory. Application of fractal theory in land use structure involve in the calculation of fractal dimension of land use type, research method and fractal description of change of land use structure, fractal model of region landscape and so on, but fractal mechanism of spatial diversity of land use type is rarely reported.

土地利用类型是一种在自然和人类活动双重作用下的产物，具有不规则、相对不稳定性和复杂性特征，可以利用分形方法进行探讨；分形理论在土地结构研究中的应用涉及土地利用类型分数维的计算、土地利用结构分形研究方法、土地利用结构及其动态变化的分形描述、区域景观结构的分形模型等方面；但土地利用类型的分形机制的空间差异研究少见报道。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。