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

• 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。
• When crack expanding problem is studied, a high efficiency semi-analytical matrix perturbation method is put forward.
  对于裂纹扩展问题，提出了一种高效的半解析矩阵摄动法。
• This message caused perturbation in the Middle East Headquarters.
  这则消息在中东总部引起了不安。
• 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。
• 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。
• A sliding mode perturbation observer ( SPO) was designed for linearization of robot manipulators.
  为机械手线性化和随动控制设计了一种滑动模态扰动观测器。
• A precision analytical equation to relative motion of formation flying satellites for J2 perturbation is presented.
  给出了一种描述J2摄动情况下编队飞行卫星相对运动的精确解析模型。
• 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。
• 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。
• 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。