unknown variable

The unknown nis called a variable because its value varies.

未知数n称为变量,因为它的值可变.

In the model, the reasoning algorithm about time instants has been derived from treating the unknown temporal variable as random variable and introducing MAP estimation into temporal reasoning.

然后在这一模型下，将未知时间变量扩展为随机变量，采用基于最大后验概率估计（MaximumaPos－terioriEstimation，MAP）的方法进行统计时间推理。

Phrases like "a number" or "the number" tell us our expression has an unknown quantity, called a variable.

像一个数或这个数之类的短语，告诉我们表达式中含有一个未知量，称之为变量。

The approach based on Maximum Likeihood ( MLE) treats the unknown temporal variable as a constant, which generates a larger estimate variance, In this paper, the relation model of known temporal information and unknown temporal variable has been established.

Kirilov的基于极大似然估计（Maxi－mumLikelihoodEstimation，MLE）的推理方法将未知时间变量看作常数，估计方差较大。

However, this project work range and the relationship between complex, engineering emergency, short time limit, task, and unknown variable factors is various, certainly will increase the project risk and technical difficulties.

然而，这种项目的工作范围大而且相互之间的关系复杂，工程紧急，工期短，任务重，而且未知的可变的因素繁多，势必增加了该项目的风险性和技术难度。