In fact, tunnel fire is unsteady and variational because of throttling effect and buoyancy effect.

实际上,在节流效应和浮力效应作用下, 隧道火灾是动态变化的.

Owing to the good fitness of this control method, it can be used in large delay industry process of uncertain model and variational parameters.

由于该控制方案有很强的适应能力，所以适用于缺乏精确数学模型且参数变化的大迟延工业过程。

The past state information, state variational information and the past inspirit information were used to estimate the uncertainty and the external disturbance.

时滞观测器是利用系统过去的状态信息、状态变化的信息以及过去的激励信息来估计当前系统存在的不确定性、外部扰动。

The variational calculus is a powerful tool in mathematical physics.

变分的微积分是数学物理中的强大工具。

The variational principle helps in finding the best possible solution.

变分的原理有助于找到最佳的解决方案。

Researchers applied a variational approach to solve the optimization problem.

研究人员应用了一种变分的方法来解决优化问题。

The variational method is used to approximate the ground state of a quantum system.

变分的方法用于近似量子系统的基态。

In physics, variational techniques are often employed to derive equations of motion.

在物理学中，变分的技术常用于推导运动方程。

Then the stochastic variational principle is formulated.

并由此推导了二阶摄动随机变分原理.

Objective To study the variational rules of biological stabilization.

目的研究饮用水管网生物隐定性指标的变化规律。