查询词典 probability density function

They concluded with a challenge that has become the rallying cry for all SETI enthusiasts since:"The probability of success is difficult to estimate; but if we never search, the probability of success is zero."

他们和所有 SETI 爱好者的挑战已经来临，而他们的口号是："成功的可能性无法估计；但是，如果我们不去搜索，那么将无法成功。"

The acute rejection probability is higher in patients with positive PRA; in other hand, the probability is lower in patients with negative PRA.

术前、术后群体反应性抗体阳性患者，术后发生急性排斥的概率较高；而术前、术后群体反应抗体阴性的患者发生急性排斥的概率较低。

How to use the result of probability prediction i s discussed in this paper. It is noticed that the probability of earthquake occu r rence strongly depends on the time, space and magnitude span to be predicted.

对概率预测结果的使用进行了探讨，提出应充分注意发震概率的大小与地震发生的时空强范围之间的关系。

The results show:(1) the probability at small scattering angle is larger than that at big scattering angle. With the increase of collision energy, the scattering probability and the tail effect slow down.

结果表明：(1)小角散射的概率大于大角散射的概率；碰撞能量越高，散射概率越小，尾部效应越弱。

People, on the other hand, do senesce , because the probability of a 70-year-old dying in the next year is higher than the probability of a 60-year-old dying in the next year.

另一方面，人们却实实在在衰老，因为在下一年度，70岁老人死亡的可能性高于60岁老人。

For evaluating the firing efficiency of missiles to do ship-to-shore firing, this paper chooses damage probability as the index, uses overlapping coefficient to correct the effect of overlapping, and calculates the damage probability based on Monte Carlo method.

为了更好的评定舰载火箭炮对岸射击的射击效能，选用了毁伤概率为效能指标，应用重叠系数法排除子弹重叠的影响，运用蒙特卡罗法计算出毁伤概率，并给出了保证实验精度的方法。

The message overflow probability is discussed. The probability distribution and the expectation of message sojourn time are presented. This paper illuminates how to choice system parameters to meet the real-time requirements of the system.

本文研究了基于TDMA的通信系统中报文延迟问题，建立了时延模型，讨论了报文溢出概率，给出了报文驻留时间的概率分布和期望值的计算方法，并说明了如何选择系统参数以满足系统的实时性要求。

It is proved that if the optimal solution tree has an inter-node, the necessary and sufficient condition that tree structure GAs are solution foundable is that the initial population contains an inter-node; the upper limit of solution foundable probability is also calculated and the population size is proved to increase at most in a polynomial of increasing problem complexity and the probability upper limit.

本文接着给出了当初始群体随机产生，只有杂交算符作用或只有复制与杂交算符作用的遗传算法有解的充要条件，并加以证明；而且求出了这时有解的概率上限，并证明群体大小的增加不超过问题复杂性和有解概率上限的某个多项式。

An inductive learning method for classification based on information theory is proposed, which is a maximum contribution classification method according to the theory of channel transmission in information theory, the definition contribution is developed based on probability distribution of classified space, probability transfer matrices of classified space and feature space and mutual information, then entities is classified by the maximum contribution method.

提出了一种基于信息论的归纳分类学习算法－最大贡献分类算法。该算法根据信息论中信道传输的理论，把类别空间和各特征空间的概率转移矩阵以及互信息结合起来，定义了贡献的概念，从而得出了对给定的观测值，用它的最大贡献作为对实体进行分类的规则。

Students will learn Descriptive Statistics, Probability and Random Variables, Probability Distributions, Sampling and Sampling Distributions, Statistical Estimations, and Hypothesis Testing in Statistics.

同学们将在统计学中学习叙述统计量的意义与计算、机率与随机变数、机率分配、抽样与抽样分配、统计估计、假说检定等基础统计方法。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。