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

• 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 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。
• 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。
• 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。
• 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。
• 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 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。
• The paper put forward a method based on resonant cavity perturbation principle to measure the hydrogen wetness in generator.
  针对目前测量发电机氢气湿度方法和仪器的不足，提出了采用谐振腔微扰测量氢气湿度的新方法。
• 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。