幂函数

N -alkylation of aniline by diethyl ether on Al 2O 3 was studied.

研究了在氧化铝催化剂上，苯胺与乙醚气相N -乙基化反应的动力学，得到了幂函数型动力学模型。

To improve the precision of tree biomass parameter calculation, this paper explicates the principle, method and process to estimate the parameters of tree biomass by the nonlinear least square according to the formula of allometry method. It gives the formula to calculate the variance and covariance estimated parameters, and reveals the essence of logarithmic linearization regression of power function.

为了提高林木生物量参数的计算精度，根据林木相对生长公式，阐述用非线性最小二乘法求解生物量参数估值的原理、方法和过程；给出计算参数估值之方差与协方差的公式；揭示幂函数对数线性化回归的本质。

The relationship of fresh, dry biomass and their diameter of fruits took on power or exponential allometry, and linear isogony, which were significant and very significant in east, south, west and north in two sites.

樱草蔷薇果实生物量中，果实鲜、干重和其果球径两个数量性状之间或呈异速或同速生长，其相关性均达到了极显著水平，总体上均呈直线或幂函数的规律变化。

The water content of attraction and capillary decreased with the increase of the matrix suction, which consisted of attraction and capillary power s.

结果表明，非饱和黄土的水分特征曲线可用幂函数关系描述；吸着水含量与毛细管水含量随基质吸力的增大而减小；基质吸力由吸着力和毛细管力形

It was shown that the matrix suction decreased with the increase of the water content and density. The relationship among temperature, density, matrix suction and water content was exponential.

试验数据分析表明：基质吸力随含水率的增大而减小；基质吸力随密度的增大而增大：温度、密度、基质吸力与含水率之间符合幂函数的变化关系。

Applying the reaction route that methanol direct reforming and methanol decomposition carry out parallel, the kinetic model with power function type was established for Samp-10 catalyst in SRM, and the parameters of the model were also computed by the least twain multiply method.

以Samp-10催化剂为例，采用甲醇直接重整和甲醇分解平行进行的反应途径，建立了适合其在SRM制氢反应中使用的幂函数型动力学模型，并利用最小二乘法确定了模型参数，得到了其速率方程表达式。

By mono-factor analysis of the point drip infiltration,the horizontal and vertical movement distance of soil wetting front were not only in close relation with dripper discharge and drop water,but also had good power functional relation which exists with the soil characteristic ( soil density, soil initial moisture).

以室内试验为基础，测定了重壤土、中壤土、砂壤土在不同滴头流量、不同灌水量下的点源入渗运动过程，通过对点源入渗特性的单因子分析表明，湿润锋水平、垂直扩散距离不仅与滴头流量、灌水量关系密切，与土壤特性(土壤容重、初始含水率)也存在良好的幂函数关系，得出了以土壤物理参数和湿润比及湿润深度为基础的点源滴灌滴头流量的设计模式

On the basis of analyzing hyperbola and exponent models in common use, the power function model is presented.

在分析了岩体节理法向变形的对数模型、双曲线模型的基础上，提出了一种幂函数模型。

In the first chapter, we discuss the Newtonian filtration equation with nonlinear exponential boundary sources.

在第一章里，我们讨论具幂函数型非线性边界源的Newton渗流方程。

The former two accorded with exponential function equation,and the latter power function equation.

前两者以指数函数类型建立的回归方程最好，后者以幂函数类型建立的回归方程最好。

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。