We often assume in finance that random variables, such as returns, are normally distributed.
我们经常在金融学中假设随机变量，比如回报，是正态分布的。
We often assume in finance that random variables, such as returns,are normally distributed.
金融学中我们常假设随机变量,例如收益率,是服从正态分布的
In mathematical terms, values that are not known with complete certainty are called random variables.
在数学术语中，不完全确定的值称为随机变量。
3 For many random variables, a good choice is the normal distribution, often represented as a bell-shaped curve, shown in Figure 1.
3对于许多随机变量来说，一个好的选择是正态分布，常常表现为一个钟型曲线，如图1所示。
Should your stochastic variables be correlated, you should rather introduce the correlation yourself instead of reusing a random engine, so that you can ensure it is correctly modeled.
应该你的随机变量是相关的，你应该介绍相关而不是重用一个随机的引擎，这样你就可以确保它是正确地建模。
In classical reliability theory, the lifetimes of systems and components have been assumed to be random variables.
在传统的系统可靠性的研究中，系统和各部件的寿命都看作随机变量。
No matter how ahead of us is the random variables, no matter how the variance of future, believe the trough, wave be far behind?
不论我们前面是怎样的随机变量，不论未来有多大的方差，相信波谷过了，波峰还会远吗？
A time series data set is a sequence of random variables indexed by time.
时间序列数据是以时间为指标的一个随机变量序列。
The paper gives four kinds of convergence of sequence of random variables in probability theory, proves the relations between them.
给出了概率论中所用到的随机变量列的四种收敛性，证明了它们之间的关系。
This paper gives a new concept of variance of fuzzy random variables and discusses it's property and calculation.
本文给出了模糊随机变量的方差这一概念，并讨论了它的一些性质及计算方法。
The main research objects of this theory that bases on the geostatistics are those random variables with certain variability on space.
该理论是建立在地统计学基础之上，其研究的主要对象就是那些在空间上具有一定变异性的随机变量。
Considering the effect of the shadow fading and fast fading on the receive signal, the received useful signal and interference signal should be random variables which change continuously.
考虑到阴影衰落和快衰落对于接收信号的影响，接收到的有用信号和干扰信号是随机变量，相应的载干比也是随机的。
Variance is an index that can describe distribution of random variables, and is used to describe inter-category distribution of feature term .
方差是描述随机变量分布情况的指标，本文用方差来描述特征词在类间的分布情况。
The convergence of the sum of random variables has being studied by many people for a long time.
随机变量之和的收敛性问题已有许多人在研究，并取得很多很好的结果。
For a problem with performance functions which include random variables with fuzzy distribution parameters (FDP), it is important to evaluate their reliability accurately and rapidly.
对于功能函数中含有模糊分布参数(FDP)的随机变量问题，如何准确且简便地评估其可靠性，是十分重要的。
This paper studies estimation of stochastic intensity from observed values of mixed Poisson random variables.
研究用混合泊松随机变量的观察值来估计其随机强度的问题。
The advantage of the method is that there is no requirement on the distribution of the random variables involved.
不要求了解所涉及的随机变量的分布函数是该方法的特点。
Through the experiment of 16 CFRP strengthened RC beams, the stochastic parameters of random variables were obtained.
通过对16根CFRP加固混凝土实验梁受弯实验，得到了随机变量的统计参量。
Supposed the income flow of the insurance company is a serial of random variables in the compound binomial model, we generalized the compound binomial model.
本文假设在复合二项模型中保险公司的保费收入流为一个随机变量序列，将模型进行推广。
How big are the lag increments of partial sums of dependent random variables? In this paper, the question will be answered: in suitable mixing conditions, we have.
相依随机变量部分和过程的滞后增量有多大？本文回答了这个问题。在适当的混合条件下，有。
From the mathematical point of view, survival analysis is a type of statistical analysis towards one or more non-negative random variables.
从数学角度看，这种研究主要是对一个或多个非负随机变量进行统计分析。
In the design of mechanical strength reliability of tower vessel, all kinds of random variables need to be analyzed statistically.
在塔器的可靠性强度设计中，需要进行各种随机变量的统计分析。
The probability sensitivities between random variables are analyzed and the reliability index and the corresponding condition classes are obtained.
得到了多个随机变量的概率灵敏度、主要失效模式所对应的可靠度指标及其相应的状态等级。
When the mean of random variables is zero, the solution is shown to reduce a known result for the value of the integral over the first quadrant.
当随机变量的均值为零时，这个解在第一象限上的积分值可简化为一个已知的结论。
The results of this paper further enrich the theory of fuzzy random variables.
研究结果进一步丰富和完善了模糊随机变量理论。
This paper studies the statistical method of hydraulic structural size random variables and the influence of size uncertainty on reliability of hydraulic structure.
研究了水工结构尺寸随机变量的统计方法以及尺寸不定性对水工结构可靠度的影响。
On the other hand, the moment, the second moment and variance of the present value random variables about some life annuities and annuities with random interest rate are gotten.
另一方面讨论了随机利率下的一些离散年金、连续年金和连续生存年金现值随机变量的一阶和二阶原点矩及其方差。
Some qualities of characteristic functions are discussed, and study on random variables is studied.
讨论了特征函数的一些性质，并对随机变量的研究作了一定的探讨。
Partial derivatives of eigenvalues and eigen vectors with respect to random variables for structures are deduced by means of the concept of mode truncation.
为求出随机特征对的方差，借助于模态截断概念推出诸特征值与特征向量对随机变量的偏导数。
Partial derivatives of eigenvalues and eigen vectors with respect to random variables for structures are deduced by means of the concept of mode truncation.
为求出随机特征对的方差，借助于模态截断概念推出诸特征值与特征向量对随机变量的偏导数。
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