数学期望

按照期望值决策准则，使得总费用的数学期望E（c）达到最小值的设计，就是优化设计。

When the mathematical expectation of the total cost , E ( c ), reaches minimum , the design is optimal according to the expected value decision rule .

利用AID（AutomaticInteractionDetection）预测法，进行了编程计算，得到了预测规则，并给出了预测的偏差平方和及降水pH值的数学期望估计值；

Based on the AID ( Automatic Interaction Detection ), a forecast method and the error square sum of forecast are given . Then the mathematical expectation of the pH value is estimated .

根据扫描电镜照片，对Si相分类统计，用概率统计求其数学期望值来定义变质度。

The modification rate was defined as statistic probability for expectated value based on the classified Si phase SEM photos .

当数学期望已知时，估计或检验方差所使用的统计量是x~2分布而不是u分布。

When the mathematical expection is known , the statistic used for estimating or sting variance is x2 distribution not u distribution .

为了减少计算量，并使Web服务的QoS指标值随着各因素的变化能够动态地自适应更新，使用数学期望和方差对QoS指标进行处理。

In order to reduce the computational complexity and make the Web service QoS index value dynamically adapting to all factor changes , use mathematical expectation and variance index for QoS processing .

利用偏最小二乘回归理论，对酸雨数据进行了编程计算，得到了偏最小二乘回归方程，并计算了偏最小二乘回归模型的预测残差平方和降水pH值的数学期望估计值。

Using the partial least square regression theory , the partial least square regression equation the error square sum of forecast are given . Then the mathematical expectation of the pH value is estimated .

给出了p－范分布子样的3个抽样分布&χp分布、tp分布及Fp分布的分布函数及数学期望、方差与不确定度区间的计算公式，并对若干有关分布的应用问题进行讨论。

This paper gives the calculating formulas of the distribution function and some digital characters of the p norm sample distributions & the χ p 、 t p and F p distribution .

针对多径信道环境下的DVB-T系统，给出了数学期望最大（EM）算法迭代检测发送信号的方法，初始信道的频率响应采用最大似然（ML）和最小均方误差（MMSE）方法进行估计。

This paper gives the ML and MMSE method of channel estimation in DVB-T system and gives an iterative detection of transmitted signals using EM algorithm .

借助广义Pettis积分、算子值数学期望、连续修正模等概念，得到了指数有界C半群的概率型逼近式及收敛速度的估计式，改进了已有的结果。

Making use of general Pettis integral , operator-valued mathematical expectation and continuous modified modulus , this paper has deduced the probabilistic approximation and convergent rates about exponentially bounded C-semigroups , which has improved existing results .

方法：以离散性Markov链拟合生存过程，据此计算log-rank统计量的数学期望和方差，导出样本含量估计公式。

Methods : The survival process was modeled by discrete Markov chain and the asymptotic expectation and variance of log-rank statistics were calculated thereafter . The sample size formula was thus derived .

本文讨论了如何用倒向随机微分方程（BSDE）来计算一类最小数学期望；

In this paper we discuss how to use Backward Stochastic Differential Equation ( BSDE ) to compute one kind of the minimum expectation .

其原因是，当应用Gauss-Hermite积分公式近似条件数学期望时并没有考虑到标准布朗运动的性质。

The reason is that we apply Gauss-Hermite quadrature rule to approximate the conditional mathematical expectations with-out considering the properties of the standard Brownian motion .

利用Bernstein算子的数学期望表达式及概率论中相关的数字特征不等式来证明文献[4]中定理A，使其证明过程得到简化，并且我们把这种证明方法推广到一类概率型算子当中。

We prove Theorem A in [ 4 ] by using probabilistic representation of the Bernstein operators and probabilistic inequalities so that the proof is simplified . Moreover , we extend this method of the proof to a class of operators of probabilistic type .

为了获得比较准确的MTBF，论文首先拟合故障间隔时间的分布模型，然后引入灰关联分析法寻求故障间隔时间的最佳分布函数，最后用数学期望法计算得到MTBF。

To acquire accurate meantime between failures , the distribution function should be fitted , then the grey associative analysis is used to get the best distribution model , from which precise MTBF can be obtained by calculating the expectation .

为定量估计与提高基于空间分割的手写输入系统用户绩效，运用Fitts定律及离散变量的数学期望等方法推导了用户绩效的数学模型。

To predict and improve the human performance in spatial segmentation Chinese handwriting recognizer , a mathematic performance model was set up based on the Fitts ' law and mathematical expectation of the discrete variables .

文章引入Bernoulli随机变量，研究它的基本运算性质，并尝试借助Bernoulli随机变量的数字特征及其各种运算性质来计算部分离散形随机变量的数学期望及方差。

The paper introduces the random variable of Bernoulli and discusses its basic operational quality . The paper also tempts to use the digital characteristic of the random variable of Bernoulli and different kinds of operational qualities to caculate the expectancy and variance dispersion of some random variables of discrete .

由于目标函数是完工时间与工期平方偏差和的数学期望（ESSD）时，有些问题的求解变的非常困难，采用的目标函数是期望完工时间与工期平方偏差和（SSDE）。

When object function is the expected sum of squared deviations ( ESSD ) of the job completion times , some problems are very hard for solving . Our object function is the sum of squared deviations of the job expected completion times ( SSDE ) .

在线计算离散随机变量数学期望的实时算法

Real-time Algorithm of Calculating the Mathematical Expectation of Discrete Random Variables

离散型随机变量的数学期望应用举例

On the Mathematical Expectation of the Application of Scattered Random Variable

求随机变量数学期望的常见方法和技巧

Commonly-used methods and Technigues in demonstrating mathematics expectation of stochastic variable

对随机变量数学期望概念的探讨

A Discussion of the Definition of Expectation of Random Variable

数学期望与不确定性条件下选择理论的几个问题

Several Problems about Expectation and Choice Theory on the Condition of Uncertainty

模糊概率随机变量的数学期望和方差

Mathematical expectation and variance of random variable with fuzzy probability

证明了变异系数的数学期望是不存在的；

Prove that the mathematical expectation of the coefficient of variation inexists ;

一种基于数学期望的亲子与同胞相关系数的估计方法

A method for estimating parent-offspring and AMONG-OFFSPRING correlations based on mathematical expectations

多项分布的数学期望、协方差阵、特征函数及母函数

Expectation covariance , matric characteristic function and generating function of multinomial distribution

指出了最小数学期望算子与数学期望算子的某些不同之处。

The difference between the minimum expectation and the expectation operator is shown .

数学期望法在高聚物共混体系辐射交联中的应用

The application of mathematical expectation theorems to radiation crosslinking of polymer blend system

然后求出了使利润数学期望值最大化的最优存贮水平的条件方程式，为实际补到水平控制提供依据。

It provides a reference for how to control actually the replenishment level .

一类单调函数的数学期望

A Mathematical Expectation for a Class of Monotone Function