指数函数

When coverage varying from high to low, the parameter a decreasing, and b increasing. The fitted regression equation between total vegetation coverage and runoff duration as following, C = 3.4881nt_p -11.772 (R~2=0.9477). The equation shows that the vegetation is positive correlation to duration, i.e.

高寒草甸产流、产沙的试验结果表明，不同植被盖度的嵩草草甸其产流、产沙过程可以用幂函数R=at~b分布来描述，随着盖度由大变小，方程参数a值逐渐变小，b值逐渐增大；而覆盖度在5％以下的黑土滩，其产流、产沙过程更符合指数函数R=ae~分布。

Transcendental function can't be expressed in terms of algebra.

超越函数包含了三角函数，反三角函数，指数函数以及对数函数。

In this paper, we present an algorithm to accurately compute the exponential of a triangular essentially nonnegative matrix.

本文给出了一个计算本质非负三角阵的指数函数的高精度算法。

A function description method of synergies among the human joints was proposed by using trigonometric and exponential functions.

利用三角函数和指数函数，建立了人体关节角度之间协调元的函数描述方法。

The time course of RRP and SRP secretion can be fitted by single exponential function, and UPP by line function.

研究发现RRP的分泌和SRP的分泌都能够很好的被单指数函数拟合，UPP的分泌可被线性函数拟和。

That attical is to appty the regression analysis and the colleet analy- sis in the mathematics statistics method to make the first definite mea- sure analysis for recationship of physical geography factor and divis on of geographical type.

本文应用数理统计方法中的回归分析和聚类分析，对自然地理要素间关系和地理类型的划分作了初步的定量分析。在回归分析中，应用我国山地的降水资料建立了地形高度对降水影响的数学模型，得出山地降水垂直分布规律服从于线性、幂函数、指数函数和对数律。

When constructing the chronology,the cambial age of the first ring from the pith is regarded as 1 year.

该方法对建立可靠、准确的长年表有重要意义，所建年表比用传统负指数函数方法建立的年表保留了更多的低频变化信息。

Thunbergii trees were established, and the sun survivorship curves were drawn with field data. The results showed that in the three plots, the height and basal diameter growth of regenerated young P. thunbergii trees had exponential, linear, and quadratic functional relations with age and the age structure was of spindle, discrete, and pyramid types, respectively. Most of the regenerated young trees were distrbuted at 0.3-1.2 m from their nearest standing trees, and the individuals of the young trees decreased near to or far from the nearest standing trees. Inplots Ⅰ and Ⅲ, the expected average life of regenerated young P. thunbergii trees had a decreasing trend with their increasing age, and the survival number of the population also decreased with increasing population age. The survivorship craves of regenerated young P. thunbergii trees in the two plots approximated to the type of Deevey Ⅱ, indicating that the young P. thunbergii populations in the plots were at stable development stage. The population structure of regenerated young P. thunbergii trees in plot Ⅱ was lesser integral, suggesting that the population was of declining types being related to human disturbance, slope and other environmental factors.

结果表明：(1) 3个样地中幼龄植株高生长、基径生长与年龄均分别呈指数函数、直线和二次函数关系；(2) 3个样地黑松幼龄植株年龄结构存在着明显差异，分别表现为纺锤形、残缺型和金字塔型；(3)幼龄植株主要集中分布在距最近立木0.3~1.2m，离立木越近或越远幼龄植株均逐渐减少；(4)对样地Ⅰ和样地Ⅲ黑松幼龄植株生命表和存活曲线的分析表明，随年龄的增加，黑松幼龄植株生命期望值基本上呈递减趋势，黑松幼龄植株种群存活数也随着年龄的增加而降低；样地Ⅰ和样地Ⅲ黑松幼龄植株种群存活曲线近似于Deevey Ⅱ型，表明2个样地黑松幼龄植株种群处于稳定发展阶段；(5)样地Ⅱ幼龄植株种群结构很不完整，表明该种群属于衰退型，与人为干扰及坡度等有关。

The total of these two sorts of functions is called S-functions The indicial function, sinusoidal function, cosinusoidal function, hyperbolic sinusoidal function, hyperbolic cosinusoidal function, trigonometric function of n-order and hyperbolic function of n-order etch are all belong to S-functions.

指数函数、正弦函数、余弦函数、双曲正弦、双曲余弦、n阶三角函数和n阶双曲函数等。都是S－函数的特殊形式。文中证明了关于S－函数及其各阶导数的性质的三个定理。

By comparing the tuning width of the input and output tuning curves, it is shown that the orientation selectivity is sharpened after being processed by the intracortical connection.

为了阐明这种锐化作用的机制，我们进一步分析了视皮层神经元的调制传递函数，观察到在输入和输出信号之间，存在着一种指数函数关系。

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。