阶矩

The analysis indicates that the mean intensity distribution on the receiver plane is closely related to the ratio of the lateral correlation length to the surface root mean square height.

研究了粗糙目标对相干光场的散射，导出了在接收平面上光场的自相关函数、光强度的分布和光强度的二阶矩，在分析粗糙目标对激光脉冲后向散射的基础上，提出了后向散射光强度与目标均方根高度和相关长度的关系，阐明了粗糙目标的后向散射机理。

Based on the approach of turning some of the relevant extreme-value-type and logarithmic normal distribution variables into independent and normal random variables, the shear-slipping failure probability of a high arch dam is worked out to be of the order of magnitude of 10^(-5) by means of second-order moment method.

在将部分相关的极值型与对数正态分布随机变量转换为独立、正态随机变量的基础上，利用二阶矩法计算得到某高拱坝的剪滑失效概率为10^(-5)量级。

In addition, the data in the archive is often subjected to the same analysis: marginal distribution estimation and analysis, second and higher order moment analysis, statistical fitting, and time- based load estimation.

另外，数据在档案中，是经常遭受同样的分析：边缘分布的估计和分析，第二次和高阶矩分析，统计拟合，并基于时间的负载估计。

The projection area of egg image is extracted by 0-order moment and used to classify egg weight instead of metage. The classification accuracy is 97.73% for bigger eggs, 97.04% for normal eggs, and 96.51% for smaller eggs.

提出利用种蛋图像零阶矩计算图像投影面积代替重量称量的方法，检测结果与实际称量值间有良好的相关性，过大蛋、正常蛋、过小蛋检测准确率分别达到了97.73%、97.04%和96.51%。

Inspired by image salient area detection model, A model for extracting local invariant feature is proposed based on salient measurement of local second moment matrix.

借鉴图像显著性区域的检测思想，提出一种基于局部二阶矩显著性估算的局部不变特征提取算法。

With the correlation, the second moment of crystal size distribution in the kinetic model of literature was able to be replaced, and the parameters of nucleation and crystal growth rate were able to be directly acquired by computer program design.

利用此关联式，对文献模型中晶体粒度分布函数的二阶矩量进行替换，并结合计算机程序设计，可直接拟合得到结晶体系的成核和生长动力学参数，从而为结晶动力学模型的求解建立了一种新型算法。

The study aims to evaluate the pricing of water utilities by generalized method of moments estimation.

主要介绍城市水价预测边际成本方法数学模型及其广义二阶矩估计的研究。

By measuring the instantaneous value of short-wave spectrum, we can get an important parameter of the local ionosphere, foF2, and then work out the MUF of the electrocircuit.

通过对测试结果进行统计分析可以得出：短波频谱的一阶矩ICF和电离层F2层临界频率f0F2具有很好的相关特性，通过测量短波频谱的瞬时值可以得到本地电离层的重要参量f0F2，进而可以计算出电路的最高可用频率。

In fact, negative skewness means that the risk for a substantial loss is bigger than the chance of a substantial gain. A high level of kurtosis means that the asset has a high probability of extreme events.

负偏度的存在使得资产收益下降的可能性大于上升的可能性；超出峰度的存在使得极值事件比在正态条件下更容易发生，从而增加风险，将其统称为高阶矩风险。

Especially, as an important consequence, the light intensity on the transverse plane perpendicular to the propagation axis is given.

作为一个重要的特例情况，文中还给出了横截面上的光强公式，这个结果可用来对非傍轴光束的强度二阶矩及M2因子等物理量进行研究。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。