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If cumulative is TRUE, EXPONDIST returns the cumulative distribution function; if FALSE, it returns the probability density function. 如果cumulative为TRUE,函数EXPONDIST返回累积分布函数;如果cumulative为FALSE,返回概率密度函数。
In this paper, the method of generating random number with given probability density function is proposed by using vertical density representation. 摘要本文首先介绍基于垂直概率密度表示的，给定密度函数的随机数生成的通用方法；
The structure of PMN is a four layer feedforward neural networks(FNN), where the Gaussian probability density function is realized as an internal node. PMN网为一个四层前馈网，它构成一个贝叶斯分类器，实现多类分类的贝叶斯判别，把输入的说话人语音数据模型参数通过网络变换为输出的说话人判定。
For the accident assessment probability density function can be used to solve the uncertainties of estimation of the source intensities. 应用几率密度函数可解决事故预测时源强估算的不确定性问题。
The binned kernel density estimators were exploited to estimate the probability density function of background intensity in training sequence. 该模型采用分箱核密度估计算法从训练图像序列中得到背景的密度函数。
Weibull probability density function (pdf) is used to describe the diameter of breast height (dbh) distribution for stand structure. 以韦伯机率密度函数来描述直径分布，表示其林分结构，性态值分布状况。
However, the better such a representation, the higher its dimensionality, the more difficult it is to estimate a probability density function. 然而，这种表示方法表示得越全面，所需要的维数就越高，估计概率密度函数也就越困难。
From this expression, the Peak Probability Density Function (PDF)of echoes in the time gate is conducted by using statistical theory, and has been strong proved by field data. 然后从该式出发,应用统计学原理导出了在整个取样门持续时间内,回波峰值的概率密度函数(PDF),并给出和讨论了现场的骓证结果。
By employing the modified probability density function of Cox and Munk’s, and Pierson’s empirical sea spectrum , the bistatic scattering coefficient of sea surfaces is derived . 利用半经验的Pierson海洋波高谱以及修正的Cox和Munk大尺度坡度分布的概率密度函数，推导了白帽泡沫覆盖的随机双尺度粗糙海面的双站散射系数。
In signal processing applications, it is often required to compute the integral of the bivariate Gaussian probability density function (pdf) over the four quadrants. 在信号处理的应用中 ;经常需要计算双变量高斯概率密度函数在四个象限上的积分值 .
If Bayesian inference used to describe the problem, the posterior probability density function of earth model describes the solution of a geophysical inverse problem. 若贝叶斯理论被用来描述反演问题的话，则地球模型的后验概率密度函数可以用来描述反演问题的解。
On the basic of academic function,using the“beeline substitute curve”theory,designed a kind of new probability density function:simplified linear normal distribution function. 在理论分析的基础上,应用“以直代曲”的思想,设计出一种新的简化正态分布函数。
By means of the equivalent nonlinear system met hod, the analytical solution of the joint probability density function of steady- state responses of Coulomb sliding friction rigid structures to vertical Gauss ian white noises is derived. 运用等效非线性系统法推导了库伦摩擦刚性滑移结构在竖向高斯白噪声地面作用下响应的稳态合概率密度函数的解析解。
In blind source separation (BSS), the general methods firstly assume the probability density function (PDF) of sources to obtain the important activation function (AF), and then separate the source signal from mixture signals. 盲源分离(BSS)算法通常需预先假设源信号的概率密度函数(PDF),并由此获得关键的激活函数(AF),进而从混合信号中分离出源信号。
To estimate probability density function(PDF) of the target state based on samples,a new Expectation Conditional Maximization Either(ECME) algorithm is introduced and embedded in the SPF. 为了根据样本估计目标状态的概率分布;提出了一种新的ECME算法;并嵌入到t-分布粒子滤波器中.
Since the probability density function of chaotic sequence for Kent map is the uniform function on interval (0,1), the hybrid chaos optimization-BFGS algorithm is established on basis of Kent map. 之后,考虑到Kent映射混沌轨道点密度为均匀分布,建立了基于Kent映射的混沌-BFGS混合优化算法。
By utilizing constructional test data for concrete pavement in Shantou-Meiling Expressway,this paper concludes a new nonnormal probability density function,which is used to test the construction result and the results is reliable. 利用汕梅高速公路混凝土路面标的施工试验数据,提炼出了一种新的非正态概率密度函数,并对施工结果进行了检验,得出了可靠的结果。
In the research of electricity price uncertainty, the probability density function (PDF) of system marginal price (SMP) in the day-ahead spot market is one of focused and unsolved problems. 该文针对系统边际价格的概率分布模型问题，展开实证分析，验证了系统边际价格概率分布的超高斯性，并提出了适合的电价超高斯型概率分布模型。
The nonuniformity of infrared focal plane arrays (IRFPA) was analyzed from the probability density functions of the input irradiance and read-out response. 摘要提出从输入辐射和输出响应的概率密度函数角度分析红外焦平面阵列非均匀性问题，并以此建立基于时域统计特性的自适应非均匀校正算法。