查询词典 variance

Consider the dependencies between the coefficients and their parents, a non-Gaussian bivariate distribution is given, and corresponding nonlinear threshold function is derived from the model using Bayesian estimation theory. According to non-subsampled Contourlet transform and bivariate threshold function, a novel Non-Subsampled Contourlet Transform based on Bivariate threshold function for image denoising is proposed. This scheme achieves enhanced estimation results for images that are corrupted with additive Gaussian noise over a wide range of noise variance.

该文依据非下采样Contourlet分解系数与其父系数之间的相关性，给出非高斯双变量分布，对该模型应用Bayes估值理论推导得到相应的非线性双变量阈值函数，综合非下采样Contourlet分解和双变量阈值函数，提出一种基于双变量阈值的非下采样Contourlet变换图像去噪方法。

Events,Operation and Relation of Sets, Classical Probability, Geometrical Probability , Statistical Stability of a Frequency, Axioms of Probability, Conditional Probability, Total Probability Theorem, Bayes' Rule,Independent Events,Independent Repeated Trials, One Dimensional Random Variables, Discrete Random Variables, Distribution Function of a Random Variables , Continuous Random Variables, Normal Distribution, Distribution of a Function of a Random Variable, Multidimensional Random Variables, Joint Distribution Function, Marginal Distribution Function,Discrete Two—Dimensional Random Variables,Continuous Two—Dimensional Random Variables, Independent Random Variables, Distribution of Functions of Random Variables,Expectation,Variance, Covariance, Coefficient of Correlation, Bivariate Normal Distribution, Law of Large Numbers, The Central Limit Theorems, Sample and Population ,Chi—Squared, T and F Distributions , Sampling Distributions , Point Estimation , Interval Estimation , Testing Hypotheses , A Test of Significance for Parameters in a Single Sample From a Normally Distributed Population , A Test of Significance for Parameters in Two Sample From Normally Distributed Populations .

本课程的主要内容：概率的概念与运算、随机变量及其分布、随机变量的数字特征与极限定理、数理统计的基本概念、估计和检验的基本方法，随机事件与概率随机事件、事件的关系与运算、几何概率、统计概率等，条件概率、全概率公式、贝叶斯公式、事件的独立性、二项概率公式，随机变量的概念、离散型随机变量、随机变量的分布函数、连续型随机变量、随机变量函数的分布，多维随机变量及其分布函数、边缘分布函数、随机变量的独立性、二维随机变量函数的分布，数学期望、方差、协方差和相关系数、大数定律、中心极限定理，总体与样本， X 2-分布、 t-分布和 F-分布，统计量及抽样分布，假设检验的基本概念、单个正态总体参数的显著性检验、两个正态总体参数的显著性检验。

Methods Detect the prothrombin time,activated partial thromboplastin time, fibrinogenand thrombin timein 31 cases normal person, 35 cases diabetes mellitusand 32 cases diabetic retinopathypatients with Sysmex CA-1500 automated blood coagulation analyzer, data grouping and treatment with analysis of variance.

用日本东亚CA1500全自动血凝仪对31例正常对照组，35例单纯糖尿病组及32例糖尿病视网膜病变组的凝血酶原时间、活化部分凝血酶时间、纤维蛋白原、凝血酶时间时行检测，并分组比较。

Bohr developed his theory using three concepts, all of which were at variance with the classical theories.

玻尔在发展他的学说时用了三个概念，都是与经典理论相矛盾的。

According to the ratio of genotype variance, the boll number is controlled mainly by dominance effects.

从加性效应、显性效应占基因型方差的比值看，显性效应对铃数影响更大。

It was took by variance analysis on ankle/brachium index number and temperature of toes skin and outflow tract of visualization score at the prior-treatment and post-treatment.

对比治疗前与治疗后踝/肱指数、趾端皮肤温度及流出道动脉造影显影分数的差异。

Using Latin square test, the effect of geometrical parameters on the characteristics of non-overload sewage pump was studied, and the effecting principle of geometrical parameters on efficiency, maximum brake horsepower and its location were researched, the major and minor factors affecting these performance were found out by way of variance analysis, the correction of equation on maximum brake horsepower and its location were also tested.

用正交试验法研究了各几何参数对无过载排污泵性能的影响，探索了各几何参数对效率、最大轴功率值及其位置的影响规律，并通过方差分析找到了影响这些性能的主要因素和次要因素，验证了无过载排污泵最大轴功率值及其位置公式的正确性，根据试验结果对模型泵提出了进一步设计方案，本试验结果对无过载排污泵水力设计有一定的参考价值。

BecauseIMLC is involved in not only Bulmer′s effect of selection on variance decrease but alsoancestor and its offspring′s "selective advantage"by the regression of offspring′s breedingvalues on their ancestor′s,it comes to the conclusion that IMLC could predict morereasonable and more accurate rates of inbreeding in a small closed nucleus.

作者认为长期贡献方法预测闭锁核心选择群体的近交率结果比Robertson方法更合理且更准确，这是因为长期贡献方法不但考虑了闭锁群体因选择而遗传方差降低的Bulmer效应，而且，通过后裔指数育种值对其祖先指数育种值的回归考虑了被选个体本身及其后裔的选择优势。

Burgess finds nature's reliance on disturbances and variance to be a practical issue.

博格斯发现自然对侵扰和矛盾的依赖是个实际问题。

The bright new sheen of the grey coat was sadly at variance with the worn and patched butternut trousers and the scarred boots, but if he had been clothed in silver armour he could not have looked more the shining knight to her.

灰色上装发出簇新的光彩，可惜的是底下的土布裤子却穿旧了，并打了补丁，靴子也伤痕累累，不太协调。但是在她看来，就算他穿着银盔甲也不可能胜过现在-------一个辉煌的骑士。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。