对于气井，在双对数坐标纸上绘出流量对平均储层压力与井筒压力平方差的关系图。
For a gas well the flow versus the difference of the squares of the average reservoir and wellbore pressures are plotted on log-log paper.
其结果表明，当光源的相干性变差，即变为部分相干光后，对数光强起伏方差变小；
The results show that logarithmic light intensity fluctuation variance will be less when light source coherence becomes worse, i. e. it becomes into partially coherent light.
通过ARCHLM检验认为BD I对数序列存在高阶ARCH效应，并用GARCH（1，1）模型消除残差序列的条件异方差性。
High-level ARCH effect is certification in the BDI logarithm process by ARCH LM test, GARCH(1,1)model is used to eliminate the conditional heteroscedasticity.
这里的最优准则是指正常应力水平下产品对数平均寿命估计的方差的极小化。
The optimum test design is obtained to minimize variance of least square estimation of the mean life at a normal stress level.
多重信号分类(MUSIC)算法是通过对数据协方差矩阵进行本征分解获得信号空间谱估计的方法。
MUSIC (MUltiple SIgnal Characterization) is a special spectral estimation method based on the eigen decomposition of the sample covariance matrix.
在PP图的应用中，检验了对数收益的无条件方差的分布和ARCH类模型。
In the application of pp plots, unconditional variance distribution of logarithmic return and ARCH type models are tested.
方法采用自编的工作倦怠问卷和组织公民行为问卷对党政干部进行调查，用t检验、方差分析、相关分析、回归分析对数据进行处理。
Methods to investigate the party and governmental cadres by questionnaire of job burnout and organizational citizenship behavior, t-test, ANOVA, correlation, regression were used to compute data.
通过长程情况下的马尔科夫近似，得到了互相关函数，对数振幅和相位协方差函数。
According to the Markov approximation under a long haul condition, we get the inter-correlation function, log-amplitude and phase covariance function.
本文进一步计算出股票价格模型的期望与方差，讨论了跳跃服从对数泊松分布时模型的无套利价格的下界。
We furthermore calculate the expectation and variance of random variable, and discuss the approximate value of no-arbitrage price when jump obeying poisson distribution.
本文进一步计算出股票价格模型的期望与方差，讨论了跳跃服从对数泊松分布时模型的无套利价格的下界。
We furthermore calculate the expectation and variance of random variable, and discuss the approximate value of no-arbitrage price when jump obeying poisson distribution.
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