分布

High density polyethylene with wide or bimodal molecular weight distribution was prepared by using bimetallic composite catalysts.

采用双金属复合催化剂制备出了宽或双峰分子量分布的高密度聚乙烯，并对所合成出的聚合物进行了结晶行为分析、分子量及分子量分布测试。

The result of attrition is that, where the areas of the whole leaves follow a normal distribution, a bimodal distribution is produced, one peak composed mainly of fragmented pieces, the other of the larger remains.

磨擦的结果是，在叶面上服从正态分布的地方就会产生两种分布方式，顶点上主要是小块，其他的地方是小块，其他的地方是大块的地方。

The bimodality appeared at high frequency which depends on the method used may be a false phenomenon, and which appeared at low frequency of swell can be attributed to the too weak nonlinear interaction between waves to transfer energy among different directions effectively.

高频域出现的双峰方向分布不仅依赖于估计方法，而且受到使用不恰当频散关系的影响，因此它可能是一种物理假象，但涌浪低频域的双峰方向分布随非线性度的减小出现的比率增大，可以由非线性相互作用过弱，不同方向之间不能有效传递能量来解释。

As to the Boolean Function in binary field, We studied its Non-linearity, Linearity Structure, Output Bit Independence Criterion, Balance, Completeness, Strict Avalanche Criterion, Propagation Criterion, Correlation Immunity, Linear Approximation Table and XOR Distribution Table .

对于二元域上的布尔函数主要讨论了其非线性性、线性结构、比特独立准则、平衡性、完整性、雪崩准则、传播准则、相关免疫性、线性分布表及异或分布表等特性。

NMath Stats contains a data table class with functions for computing descriptive statistics, such as mean, variance, standard deviation, percentile, median, quartiles, geometric mean, harmonic mean, RMS, kurtosis, skewness, and many more; PDF, CDF, inverse CDF, and random variable moments for a variety of probability distributions, including normal, Poisson, chi-square, gamma, beta, Student's t, F, binomial, and negative binomial; Combinatorial functions, such as factorial, log factorial, binomial coefficient, and log binomial; Multiple linear regression; Basic hypothesis tests, such as z-test, t-test, and F-test, with calculation of p-values, critical values, and confidence intervals; One-way and two-way analysis of variance and analysis of variance with repeated measures; Multivariate statistical analyses, including principal component analysis and hierarchical cluster analysis.

nmath统计包含一个数据表的阶层与职能计算描述性统计，如平均，方差，标准差，百分位，中位数， 25 ％，几何平均数，调和的意思是，有效值，峭度，偏度，还有更多的； PDF格式，民防部队，逆民防部队，并随机变量矩的各种概率分布，包括正常，泊松，卡方检定，伽玛，测试版，学生的吨，男，二项式，并负二项分布；组合的功能，例如阶乘，日志阶乘，二项式系数，并登入二项式；多元线性回归；基本假设测试，如的Z测试， t检验， F检验，计算p值，临界值，和置信区间；之一，双向和双方法方差分析和方差分析与反复的措施；多元统计分析，包括主成分分析和聚类分析。

Objective To study the distribution of Oncomelania hupensis with generalized negative binomial distribution, and provide the theoretical support for quantitative study.

目的 介绍并应用广义负二项分布研究湖北钉螺的分布规律，为定量化研究提供理论依据。

The relationship between the negative binomial distribution and the time-dependent Poisson distribution was further discussed.

并进一步阐明了负二项分布与时依Poisson分布的关系。

A theoretical distribution that is a good approximation to the binomial distribution when the probability is small and the number of trials is large.

当概率小而试验次数大时逼近二项式分布的一个理论分布。

In Bayesian statistics, it can be seen as the posterior distribution of parameter p of a binomial distribution after observing α-1 independent events with probability p and β-1 with probability 1-p.

在贝叶斯统计，它可以被看作是后分布参数P一二项分布后，观测α-1独立事件的概率P和β- 1与概率1 - P的。

Through a probability problem,a connection is showed between binomial distribution and negative binomial distribution and therefore a composed formula is set up,which is proved by way of probability and algebra.

通过一个概率问题，给出二项分布与负二项分布的一种联系，从而建立一个组合公式，并由概率思维方式与代数方式给出证明

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。