perturbation

英 [ˌpɜːtəˈbeɪʃn]

美 [ˌpɜːrtərˈbeɪʃn]

n.  忧虑; 不安; 烦恼; 摄动; 微扰; 小变异

复数：perturbations　

化学

BNC.24447 / COCA.19948

牛津词典

noun

• 忧虑；不安；烦恼
  the state of feeling anxious about sth that has happened
• 摄动；微扰；小变异
  a small change in the quality, behaviour or movement of sth
  1. temperature perturbations
     温度的些微变化

柯林斯词典

• N-VAR （尤指不常出现的）小变化
  Aperturbationis a small change in the movement, quality, or behaviour of something, especially an unusual change.
  1. ...perturbations in Jupiter's gravitational field.
     木星重力场的微小变化
• N-UNCOUNT （某事引起的）忧虑，不安，烦恼
  Perturbationis worry caused by some event.
  1. This message caused perturbation in the Middle East Headquarters.
     这则消息在中东总部引起了不安。

英英释义

noun

• the act of causing disorder
  Synonym:disruption
• a disposition that is confused or nervous and upset
  Synonym:fluster
• activity that is a malfunction, intrusion, or interruption
  1. the term `distress' connotes some degree of perturbation and emotional upset
  2. he looked around for the source of the disturbance
  3. there was a disturbance of neural function
  Synonym:disturbance
• (physics) a secondary influence on a system that causes it to deviate slightly
• an unhappy and worried mental state
  1. there was too much anger and disturbance
  2. she didn't realize the upset she caused me
  Synonym:disturbanceupset

双语例句

• We must seek two main approximation methods of solution, the variation method and perturbation theory.
  我们必须寻求两个主要的近似解法、变分法和微扰法。
• The problem of robust quadratic optimal control for uncertain linear systems with Square-integral perturbation is discussed.
  在假定扰动为平方可积的条件下，讨论了不确定线性系统二次指标下的最优控制问题。
• The interval parameter perturbation method and the interval parameter back analysis method are studied, and the interval parameter monotony back analysis method is presented.
  研究了区间参数摄动法和区间参数优化反分析法，提出了区间参数单调性优化反分析法。
• By these equations, the perturbation of linear high-order dispersion in the fiber is calculated.
  在此基础上，计算了色散缓变光纤中的线性高阶色散微扰。
• This paper introduces the concept of minimal perturbation efficient solution in minimal perturbation constraints programming.
  文中引进了极小扰动约束规划的极小扰动有效解概念。
• The system under consideration involves state time delay, nonlinear perturbation and parameter uncertainties.
  系统包含状态时滞，非线性扰动和参数不确定性。
• In the regular solution problem of the perturbation equation, the solution of convergence order is important.
  在扰动方程的正则化求解问题中，解的收敛性估计是十分重要的。
• By using the transformation and the perturbation method, the nonlinear displacement equations are linearized, and the approximate boundary value problems are obtained.
  利用变换和摄动法将非线性位移方程线性化，得到了近似边值问题。
• The quaternion matrix singular value perturbation theorem is generalized and these results are also new one for complex matrix.
  本文对四元数体上矩阵奇异值摄动定理给出了推广，且这些结果对复矩阵也是新的。
• The coupling between the transverse velocity and electromagnetic perturbation is considered.
  考虑了横向扰动速度与电磁场扰动的耦合。