Samples that can be obtained in these trails are independent with each other,but have diverse distributions,they are called unsimple random samples.
这样试验得到的样本,虽相互独立,但分布不同,是一个“非简单随机样本”。
Let X(1),…,X(n) denote the order statistics of a random sample,X1,…,Xnfrom a continuous population.
设X(1),…,X(n)是来自于一个连续分布总体的随机样本X1,…,Xn的秩序统计量,给出了任意两个秩序统计量的联合分布函数和联合密度函数的推导证明,从而为其进一步应用打下了基础。
The random samples possesses the same statistical characteristics.
结果表明:随机相位角、功率谱密度等级分别影响路面谱激励的样本形状和幅值大小,不同随机样本具备相同统计特征;对于系统的响应曲线,路面平整度等级对幅值影响相对显著,车速变化对形状影响相对显著;根据算例中不同路面平整度等级的计算结果,给出了相应的工程建议。
Structural risk minimization principle of birandom samples
双重随机样本的结构风险最小化原则
the population is divided into strata and a random sample is taken from each stratum.
总体分成阶层后由各阶层抽选出来的随机样本。
The Key Theorem of Learning Theory on Rough Random Samples;
基于粗糙随机样本的学习理论的关键定理
Structural Risk Minimization Principle Based on Complex Random Samples
基于复随机样本的结构风险最小化原则
Key Theorem of Learning Theory Based on Rough Random Samples
基于粗糙随机样本学习理论的关键定理
In this paper, the author arrives at the method keying to random sampling sum distribution in normal statistics structure.
给出了常见的统计结构中随机样本和的分布的求解方法。
The Solution of Hypothesis Test of Randomized Sample Means without Original Variable Data in SPSS Software;
无原始观测值的随机样本均数的假设检验在SPSS软件中的实现
random sampling
随机抽样,随机采样
Evaluation of the Comparative Methods of Independent Samples;
完全随机设计两样本比较方法的评价
A Goodness-of-fit Test for Linearity of a Stochastic Regression Model with Ranked Set Sample;
秩集样本随机回归模型的线性性检验
Estimation of Sample Lyapunov Exponent for Stochastic Differential Equation;
随机微分方程的样本Lyapunov指数估计
Setting of class weights in random forest for small-sample data
随机森林针对小样本数据类权重设置
A random variable with a numerical value that is defined on a given sample space.
随机变量在给定的样本空间内定义的，具有一个数值的随机变量
Through the successive sampling and the stratified random sampling in soybean fields,114 dis- tribution samples of larvae of Plusia agnata Staudinger,Clanis bilineata(Walker),Heliothis armigera H(?)
通过分层随机与连片调查获得114个样本.
PROBABILITY DISTRIBUTION OF SMALL SAMPLES OF GEOTECHNICAL PARAMETERS USING STOCHASTIC WEIGHTED METHOD
随机加权法辅助小样本岩土参数分布拟合
single random sampling
单次随机抽样 单次随机抽样
simple random sampling
简单随机抽样 简单随机抽样
A type of probability sample in which aggregations of sampling units, called clusters, are sampled at some stage in the process.
是一种将样本单元聚集在一起的随机抽样法.样本群在抽样的某一步骤被抽出.