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- sample mean and variance 样本平均值与方差
- We simulate the stochastic cycle time and get its mean and variance. 我们模拟随机的周期时间,得到平均值以及变异数。
- Process capability index that is affected by the difference between the sample mean and the target value. 受样本中心值与规格中心值之差所影响的制程能力指针。
- This paper investigates dynamic portfolio selection based on serially correlated returns for an investor who optimizes the mean and variance of the terminal wealth. 摘要以动态均值-方差模型研究基于收益序列相关的投资组合选择。
- In order to enhance the effects of fingerprint image segmentation, spatial distribution model of pixels based on Coherence, Mean and Variance was advaced and analyzed at first. 摘要为增强指纹图像分割的效果,首先,基于方向一致性、局部灰度均值和灰度方差指标,提出了像素空间分布并进行了分析;
- For a specification that facilitates regime-switching, Whitelaw (2000) documents a negative unconditional link between the mean and variance of the market portfolio. 为规范,有利于政权的开关,怀特劳( 2000 )文件的负面无条件地之间的联系,均值和方差的市场组合。
- The market possesses prior information about the mean and variance of the value of the risky asset, as well as the crosscorrelation between the public and private information. 在模型中,假设市场揭露了标的风险资产真实价值事前的平均数与变异数,以及公开与私有消息之间的共变量等消息。
- The paper deals with the change point of the mean and variance of a normal distribution.The CUSUM estimators of the locations of the change point are presented. 摘要文章讨论了正态分布中均值与方差变点问题,给出了变点位置的CUSUM型估计,证明了此估计是真实变点位置的强相合估计;
- The space distribution of the prosodic parameters is drawn using the mean and variance of the speaker pitch parameters, through which the separability of the speaker is obvious. 首先利用基音周期均值和方差的统计特性,绘制出话者音高特征空间分布图,从中看出音高特征在区分说话人个性方面的可行性,可在少量话者集合或初级识别中加以利用。
- Let be a sequence of independent and identically distributed random variables, with mean and variance .While the distribution function is unknown, and is large, then is a normal approximation distribution . 3设相互独立的随机变量服从同一分布,已知均值为,方差为.;单分布函数未知,当充分大时;近似服从正态分布
- The correlation coefficient stationary series in which the mean and variance may vary with time is one kind of familiar series in engineering, and the traditional stationary series is just a special case of that. 摘要相关系数平稳序列的均值和方差都随时间变化,是一类工程中常见的随机序列,传统的平稳序列只是它的一个特例。
- In grey-scale model, mean and variance are main feature statistical measures;in texture model, the energy, entropy, contrast, local homogeneity and correlation are main feature statistical measures. 均值和方差是灰度模型中重要的特征统计量,而能量、熵、对比度、局部相似性和相关性是纹理模型中重要的特征统计量。
- The first paper introduces a new way of approximating the probability distribution of a function of random variables.This is done with a Gaussian probability law with stochastic mean and variance. 在实际状况无法掌控时,工程师便引入机率的观点来判断系统本身具有的特性,藉由特定且连续之曲线来适当描述系统的失效机制,可靠度模型便由此衍生而来。
- Meanwhile, a recursive algorithm for computing the sample mean and covariance matrix with forgetting factors was also given to overcome the difficulties of storing the vast old training samples. 给出了带有遗忘因子的样本均值和样本协方差矩阵的递推算法,用以克服传统方法需要保存大量以往故障训练样本所带来的困难。
- I call his behaviour mean and selfish. 我认为他的行为卑鄙、 自私。
- correlation between mean and variance 均值与方差间的相关
- Distribution of sample mean and samplevariance of normal a population 正态总体样本均值及样本方差的分布
- a theoretical distribution with finite mean and variance. 平均数和方差数都为有限的一个理论分布。
- It is mostly because we're mean and ornery. 多半是因为我们小心眼,有点固执。
- Uncle Sam is portrayed as scruffy, mean and bitter. 山姆大叔的形象被画得衣着邋遢、吝啬且心胸狭窄。