mathematical expectation

In this paper, we consider both the mathematical expectation and variance for the time to failure of some systems and design a system with ideal reliability.

本文研究系统寿命的均值和方差，并设计出较为理想的可靠性系统。

Build mathematical model of quantitative analysis, confirm the expectation value of light intensity, build standard work curve, improving analysis precision.

建立定量分析数学模型，确定光强值，建立标准工作曲线，提高分析精度。

The software can be used for the general calculations and plotting of the residence time distribution, the mathematical expectation, the variance, the model parameter in single still, double still and third still of the chemical reaction engineering.

该软件可用于化学反应工程中单釜、双釜和三釜停留时间分布函数、数学期望、方差和模型参数的计算及绘图。

In this paper, a method of binary based on the threshold of the calculated character expectation value of the image's grey degree distributing is proposed. The segmentation of image object is presented based on mathematical morphology method.

给出了一种基于图像灰度分布统计特征期望值为阈值的二值化方法，并在此基础上运用数学形态学方法进行图像目标定位分割。

A Mathematical Expectation for a class Function and in Application

一类函数的期望及应用