查询词典 probability density function

Research into the method of establishing probability density function model of radar clutter signals Based on the careful analysis of the kernel estimation and the fundamental principles of the Legendre polynomial, the dissertation tentatively combines two and gets better results.

雷达杂波信号的概率密度分布模型建立方法的研究在认真分析了核估计和Legendre多项式的基本原理的基础上，探索性地将两者结合起来，取得了很好的效果。

Turbine blade ; Structural reliability ; Neumann problem ; Finite element method ; Probability density function

涡轮叶片；结构可靠性；诺曼问题；有限元法；概率密度函数

Rosenblatt and Nearest neighbors estimates are the nonparametric estimation of the probability density function.

Rosenblatt估计与最近邻估计是概率密度的两种非参数估计方法。

The results indicate that the initial deviations of the joint positions match normal probability density function limited in the range of double mean variance.

随机缺陷分析方法中假定结构每个节点的位置偏差符合二倍均方差范围内的正态概率密度函数是可以接受的。

By the minimum risk Bayes decision theory, this paper develops a new way of image segmentation: establish the mathematics model of image segmentation; estimate the probability density of grey scales and figure out its math-expectation and square difference that accord with normal distribution and the loss function; and judge the every pixel dot in the image according to the minimum risk Bayes decision theory and determine whether it is of target or non-target images, thereby realizing the extraction of the target image.

依据最小风险贝叶斯决策理论，提出了一种基于最小风险贝叶斯决策的图像分割方法。首先建立图像分割的最小风险贝叶斯决策模型，对灰度级类条件概率密度估计出其符合正态分布的数学期望和方差以及损失函数，再依据最小风险贝叶斯决策理论对图像中的每一像素点进行目标图像和非目标图像的类别判断，从而实现目标图像的提取。

The probability density function of velocity response of oleo damper excited by exponential colored Gaussian noise has been obtained.

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。

Firstly, Dempster-Shafer is developed by not only considering the certainty of the evidence, but also considering the average support of the evidence to different subsets in the assignment framework so that it can give more reliable combination result. Secondly, amplitude ratio feature and Euclid distance of the probability density distribution function in Pearson graph from different temporal SAR images are extracted to present change feathers in different scales. Finally, the improved Dempster-Shafer algorithm is applied to fuse the two different features to detect change information of SAR images.

首先通过综合考虑证据本身的确信度和证据对辨别框架中子集的平均支持度进行证据间的加权合成，改进证据理论对证据的合成，提高其可靠性；然后提取不同时相图像间的散射幅度的对比度和概率密度分布函数在皮尔逊图中的欧式距离，两种特征参数代表了像元级和区域级不同空间尺度下微波遥感图像中关于地表变化的信息；最后将改进的证据理论用于两特征之间的融合处理，得到地表的变化信息。

Vibro-impact system; Poisson white noise; Perturbation approach; Probability density function; Generalized Fokker-Planck-Kolmogorov equation

碰撞振动系统；泊松白噪声；摄动法；概率密度函数；广义FPK方程

Bayesian method is used to calculate the posterior probability density function of the parameters for the model, and then Monte Carlo method is used to sample the model for getting the estimated values of the parameters.

采用贝叶斯方法计算出模型参数的后验概率密度函数，通过蒙特卡罗方法时其进行采样来获得参数的佑计值。

On the basis of the above, the bearing estimation property of vector sensor is discussed, including the probability density function and mathematical characteristic of bearing estimation, the influence of electrical rotation, bearing correction in the low SNR, the estimation method of SNR, the restriction of multiple targets bearing estimation, the postposition process and so on.

在此基础上，继续讨论单矢量传感器的方位估计性能问题，包括方位估计的概率密度函数及其数字特征、仿真、电子旋转产生的影响、低信噪比的方位纠偏、信噪比估计方法、多目标方位估计的局限、后置处理等内容。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样