协和

The application of Karhunen-Loeve expansion to simulating the soil parameters random field is researched;and the characteristics of the KL decomposition are analyzed;and the Galerkin finite element method is adopted to solve the integral equation numerically in the irregular region and for arbitrary covariance function and to simulate the anisotropic conductivity field.

研究了Karhunen-Loeve展开在土性参数随机场模拟中的应用，分析了KL展开的特点，针对不规则区域和任意类型协方差函数提出了积分方程的Galerkin数值解法，模拟了土壤渗透系数各向异性随机场。

The whole algorithm does not need computing covariance matrix and eigen-decomposition, so the complexity is greatly decreased.

整个算法不需要协方差矩阵的计算和特征值的分解，具有较低的计算复杂度。

There are three traditional methods of estimating VaR: Covariance matrix, History simulation and Monte Carlo simulation.

估计VaR的传统方法有三种：协方差矩阵法、历史模拟法和蒙特仁洛模拟法。

Here we estimate and tune the background error covariance matrix which adapts to China region.

实际研究表明，背景场误差协方差在全球不同的区域，方差和特征长度各不相同。

Significance and application of covariance functions are discussed.

对协方差函数的意义和应用做了讨论。

To some extent,expectations and covariance s can.

均值和协方差一定程度上可以描述这些随机变量的概率分布特性。

Another emphasis in this study is analyzing the effect of change in the variance, covariance and different elasticity.

除此之外，为了更清楚了解金融市场对最优权重的影响，本文重点分析了分配给两国货币权重大小的比较以及方差、协方差和各种资产需求弹性的变化所引起的最优权重的变化。

A system model reduction method based on regional pole and covariance equivalent is proposed.

文中提出了一种基于极点分布和输出协方差匹配的随机系统模型降阶方法。

It is almost certain that genetic influences will be found, as will genetic covariance between entrepreneurship and other psychological traits.

几乎可以肯定的是，遗传的影响可以通过研究创业行为和其他心理特征的遗传协方差得以证明。

By the natural and harmonious relationship between differential forms and differential equations and between differential forms and vector analysis, we discuss the properties, which are covariant under the transformation of coordinates in the framework of differential forms, of particle motion in a central force field .

通过微分形式与微分方程和向量分析之间存在的自然而协调的关系，在微分形式框架下讨论了质点在有心力场中运动的特性并得出在坐标变换下其均是协变的

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。