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。
• In this paper, the logarithmic perturbation scheme for the central potential field is investigated.
  对中心势场的对数微扰论方法作了进一步探讨。
• Some new absolute and relative perturbation bounds of matrix are obtained.
  给出了矩阵特征值加法扰动的新的绝对扰动界和相对扰动界。
• The solution of eigenproblem of slightly damped gyro-systems by the direct perturbation method in configuration space;
  导出了在位形空间中，求解对应无阻尼问题有等导重特征值的弱阻尼陀螺特征值问题的直接摄动法。
• The equations defining the zero-order perturbation simply govern the static solution.
  定义零级微扰的方程简单地决定了静态解。
• This paper presents an iterative method for separating singular perturbation control systems.
  文章提供了一种奇异摄动控制系统的迭代分解方法。
• A mutual interference stage-structured predator-prey model is considered with time delay and impulsive perturbation on predators.
  研究了一个捕食者具连续收获与食饵具脉冲存放的阶段结构时滞捕食-食饵模型。
• From the perturbation equation of the shaker stability, the conditions of self synchronous stable running are derived.
  利用振动筛的稳定性扰动方程得到了同步稳定运转条件。
• J2 perturbation makes the relative orbit drift in the in-track direction, nutation or procession.
  J2摄动对相对轨道的影响分为相对轨道构形的漂移、相对轨道平面的章动和进动。
• 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。