数学期望是随机变量的重要数字特征之一。
Mathematical expectation is one of the important digital features of random variable.
峭度是随机变量非高斯性的一个经典度量。
Kurtosis is a classical measure of non-Gaussianity of random variable.
然而，当利率是随机变量时，目前的研究成果并不多见。
However, when the interest rate being stochastic, these are not more.
因而，是随机变量X的范围和是随机变量Y的范围等等。
Thus is the range of random variable X and is the range of random variable Y and so forth.
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.
它的主要理论基础是概率论中的大数定理，其主要手段是随机变量的抽样。
Its main theoretical base is the law of large Numbers in the theory of probability, whose main means is the sampling of random variable.
网络中的数据流是不确定的，数据包的到达时间、长度和处理时间都是随机变量。
Data stream of network is random. Arrival time, length and processing time of data packet are random variable.
坝体材料的物理参数和作用于坝体的荷载是随机变量，坝体的应力和变形呈现出不确定性。
The physical parameters of rockfill materials and the loads on concrete-faced rockfill dam (CFRD) are all random variables. They give rise to the uncertainties of stress and deformation of CFRD.
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。
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.
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
We often assume in finance that random variables, such as returns,are normally distributed.
随机变量是一个根据概率分布取值的函数。
A random variable is a function that takes values based on a probability distribution.
随机变量的加权平均值是期望值。
The weighted mean of the random variable is the expected value.
对于这个随机变量X，可能的取值个数是无限的。
I have it down that there might be an infinite number of possible values for the random variable x.
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.
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。
3 For many random variables, a good choice is the normal distribution, often represented as a bell-shaped curve, shown in Figure 1.
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？
No matter how ahead of us is the random variables, no matter how the variance of future, believe the trough, wave be far behind?
在风险分析中，随机变量的尾部一直是风险分析的重点，因为灾难事件往往就在这个区域里发生。
The tail of random variable's distribution is the focus of the risk analysis because the event with small probability often occurs in this area.
是x的连续型随机变量的概率分布。
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。
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.
市场需求量是一个随机变量，它给订货者追求最大利润，确定最优订货量带来了困难。
Market demand is a stochastic variable which brings difficulty for most profit by ordering right goods.
奇异函数是一极为重要的奇异型随机变量的分布函数，被广泛研究。
Singular function is an important distribution function of the singular random variable. It is studied widely.
估计量是一个随机变量。
空间变异理论是研究随机变量空间变异性的理论。
Spatial variability theory is the theory of studying space variability of random variable.
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。
Variance is an index that can describe distribution of random variables, and is used to describe inter-category distribution of feature term .
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。
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.
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。
The advantage of the method is that there is no requirement on the distribution of the random variables involved.
论文通过分析船公司在港口的月集装箱需求量得出其在港口的年集装箱需求量是一个符合正态分布的随机变量。
This essay deduces that the demanded container number in one port in a year is a normal school stochastic variable by analyzing the data.
如果你有一个试验，这个试验的结果是一个数，那么相对应的随机变量，指的就是这个试验结果所对应的那个数。
If you have an experiment and the outcome of the experiment is a number, then a random variable is the number that comes from the experiment.
讨论了在一个时期内商品的订购价格有折扣，而且该商品的需求量是离散型随机变量的订购问题，得出了使利润最大化的最佳订购量的计算方法。
In a given period the seasonal goods can be ordered at a discount price, and the demand for the goods is an issue of discrete random variable.
信号是任意自然物理量随其规模和时间(或其他一些随机变量)的变化而包含的信息。
A signal is simply any physical quantity whose magnitude and variation with time (or occasionally some other variable) contain information.
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