集总网络

Therefore, it is significant to research and develop a management information system of agricultural mechanization equipment for agricultural modernization. Based on the modern management theory, some mathematical modelings are constructed by system engineering theory, rough set theory, gray system theory, avail theory and neural network theory in this dissertation. It can resolve some actual problems, for instance, forecasting machine amount, agricultural machine power and prices.

本文在现代管理理论的基础上，运用系统工程、粗糙集理论、灰色理论、效用理论、人工神经网络等方法，进行数学建模，对未来农机需求、农机总动力、农机价格等问题进行探讨，并应用到农机装备管理信息系统的各个方面，对农业机械的各种信息进行传输、存贮、组织和处理分析，最终取得了较为理想的结果。

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。