标记基因的位置效应和干扰因素对这一期望值的影响是很小的，而染色体的长度对期望方差值影响很大。
The position effects of mark gene and other factors have a little influences on the expect value, but the chromosome length have much influences on it.
这是因为当增加回答选项时，就增加了方差值的数目 — (观察值-期望值)2 —您可以求它的总数。
This is because as you add response options, you increase the number of squared difference scores -- (Observed - Expected)2 -- you can sum over.
随机变量的方差衡量随机变量值与期望值偏离的程度。
The variance of a random variable measures how far from the expected value its values typically are.
3方差的专业定义是随机变量的二次中心矩，与期望值之差的平方的加权平均值。
The technical definition of variance is the random variable's second central moment, the weighted average of the square of the differences from the expected value.
本文将拉丁超立方抽样法与条件期望和对偶变数方差减缩技术组合用于分析船体总纵极限强度可靠性。
This paper proposes Latin hypercube sampling combined with variance reduction techniques of conditional expectation and antithetic variates to assess ultimate strength reliability of ship hull girder.
二次方差法对已获取的食物点作方差计算，快速剔除距其他点较远的噪声点，获得食物分布的期望位置。
The quadratic method to food spot which gains made the variance computation, rejected noise spots which were apart from other normal spots, so that it obtained the expected food distribution position.
投资者的最优收益的期望值和方差由其对应信息的风险-收益系数和风险厌恶参数共同决定。而市场的风险价格完全由信息的风险-收益系数确定。
The mean and variance of the optimal payoff is determined by both the payoff-risk coefficient of information and the risk aversion parameter, but the risk price is only by the former.
研究一类随机系统具有期望的动态误差系数、稳态输出方差和相对稳定裕度约束的满意PID控制问题。
The problem of satisfactory PID control for a class of stochastic systems with constraints on dynamic error coefficient, steady-state output variance and relative stability margin is considered.
推导出了正态分布下大额赎回量的期望和方差计算公式。
The expectation and variance of LAR formula is given by inference under normal distribution.
本文进一步计算出股票价格模型的期望与方差，讨论了跳跃服从对数泊松分布时模型的无套利价格的下界。
We furthermore calculate the expectation and variance of random variable, and discuss the approximate value of no-arbitrage price when jump obeying poisson distribution.
拟合与时间相关的QTL基因型的期望均值向量和剩余误差的协方差矩阵是动态性状功能定位的核心内容。
Modeling time-dependent expected mean vectors of QTL genotypes and the structure of the within-subject residual covariance matrix are the essence for functional mapping QTL of dynamic traits.
最后利用母函数这一工具求得一些连续型非负分布随机变量的数学期望及方差。
And finally, this tool-the generating function-can be used to get some expectation and variance of random variable of continual-type non-negative distribution.
其次，提出了价格的凸分布模型，并给出了期望价格，价格的方差和期望收益的计算公式。
Second, a convex distribution model for the price is proposed. The formulae are given respectively for the expectation price, the variance of the price and the income.
停止损失再保险作为一种再保险方式，在具有相同保费的前提下，能使保险人的期望效用最大，并能使其自留风险方差最小。
The stop-loss reinsurance as one way of reinsurance can make insurers obtain the highest expected effectiveness but the lowest risk variance.
根据中心极限定理，以随机数为基础，设计了正态随机变量的结构公式，其数学期望和方差可任意给定。
On the basis of random numbers, The structure-formula of the normal random variable has been designed according to the limit theorem.
停止损失再保险作为一种再保险方式，在具有相同保费的前提下，能使保险人的期望效用最大，并能使其自留风险方差最小。
Aiming at stop loss reinsurance, this paper derives optimal pricing model of reinsurance on the basis of total claim amount using mean-variance premium principle and utility theory.
本文利用期望-方差效用理论，讨论了单时段市场风险资产的绝对免赔额保险中最优免赔额的存在性问题，并给出了最优免赔额、最优风险资产投资额的定价表达式。
This paper discuss the optimal investment and insurance in such a one-period market and get the valuation of the optimal assets investment amount and the optimal amount of dismiss compensate.
无纸考试系统理想的组卷方式是根据试题得分概率和答题时间概率分布自动组卷，使所组卷子的预期考试成绩和答题时间数学期望和方差符合要求。
A ideal exam-paper formation algorithm of a no-paper examination system automatically makes a exam-paper to meet pre-demands of exam-grade distribution and exam-time.
无纸考试系统理想的组卷方式是根据试题得分概率和答题时间概率分布自动组卷，使所组卷子的预期考试成绩和答题时间数学期望和方差符合要求。
A ideal exam-paper formation algorithm of a no-paper examination system automatically makes a exam-paper to meet pre-demands of exam-grade distribution and exam-time.
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