借助

This paper starts with the Naroll-Bertalanffy's hypothesis of the allometric growth of urban-rural population, namely and Sherratt's model about the distribution of urban population density, which are both based on the Christaller-l o ··sch's central place hypothesis and the hypothesis of supposing the regional population movement on the ideal land surface is similar to Brownian movement process.

基于中心地假设，从城市人口分布的Sherratt模型和Naroll Bertalanffy的城乡人口异速生长关系出发导出关于人口分布空间动力学和城市扩展时空过程的数学模型，然后借助Batty等关于城市生长的DLA -DBM模拟结果证明人口的区位选择过程与城市的分形形态存在着内在关系。

Based on Brune ω~2 source spectrum ,Hanks and McGuire deduced a simplified formula of RMS accelera- tion by stationary random vibration theory and Parseval theorem.

Hanks 和 McGuire 基于 Brune 的ω~2震源谱，借助平稳随机振动理论和 Parseval 定理给出了估计均方根加速度衰减关系的表达式。

In this paper,the process of built-up edge formation is studiedby means of a high frequency camera.

本文借助高频摄影机研究积屑瘤的形成过程。

Adopting orthogonal polynomial regression method,the mathema tical model of the effects of NAA on bulbil induction, and that of 2,4ˉD on callus induction f rom leaflet on oriental lily cv."Tiber" were established.

借助正交回归多项式建立数学模型的方法，研究了NAA对东方百合"蒂伯"鳞片诱导小鳞茎及2，4ˉD对小叶片诱导愈伤组织的影响，以探讨东方百合组织培养中NAA及 2，4ˉD 的用量范围及最佳用量。

The pressure over the sample can then be increased via a gas burette.

借助量气管可增加样品上的压力。

Among them, in to the necessity analysis of newarea development in Guiyang city, the article with the help of "social burnable theory"of the social physics.

其中在对贵阳市新区开发的必要性分析中本文借助了社会物理学的"社会燃烧理论"。

Our company warmly welcomes friends of all walks of life home and abroad to negotiate business transaction.

公司借助政府的优惠政策和优越的地理条件，发展前景无限，是绿色化工企业。

By dint of computer, the system can provide Virtual Instrument's function of bus interface oriented.

借助计算机，系统可提供面向总线接口的虚拟仪器功能。

I've got this job by the agency of my teacher.

我借助老师的力量得到了这份工作。

The cacique of our high level sees the strength of the network, if network of have the aid of accelerates the propulsion of democracy, it is very useful.

我们高层的领袖看到网络的力量，假如借助网络加快民主政治的推进，是非常有用的。

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。