当产品的寿命分布为指数分布时，其密度函数为，(2)其中为指数分布的失效率。
Exponential distribution: the density function is as follows, (2) in which is the failure -rate of the.
从而导出了油液阻尼器受指数型高斯色噪声外激励时的速度响应的概率密度函数。
The probability density function of velocity response of oleo damper excited by exponential colored Gaussian noise has been obtained.
结果表明：流量与汇入率呈指数函数关系；流量-密度呈线性函数关系，并与美国经验公式一致。
The results indicate that the relationship between the flow and merging rate is exponential, and the flow-density relationship does linear, being agreeable with the empirical formula from America.
树种数和树木的密度都随高度级、径级的增加而呈负指数或负幂函数递减。
Both the Numbers of tree species and tree density decreased as height class or diameter class increased, fitting both negative exponential and negative power equations.
树种数和树木的密度都随高度级、径级的增加而呈负指数或负幂函数递减。
Both the Numbers of tree species and tree density decreased as height class or diameter class increased, fitting both negative exponential and negative power equations.
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