Modeling an inverted pendulum. Generally the inverted pendulum system is modeled as a linear system, and hence the modeling is valid only for small oscillations of the pendulum.
为倒立摆建模。通常倒立摆系统建模成一个线形系统，因此模型只对小幅度摆动的摆才有效。
Newtonian dynamics: first, second and third laws, inertial and non-inertial reference frames, conservation laws, forces and potentials, gravitational field, central forces, small oscillations.
牛顿力学：牛顿第一、二、三定律，惯性和非惯性参考系，牛顿守恒定律，力和潜能，重力场，向心力，低频振荡。
The bullet has a small magnet inside that lets it generate AC current as it spins and a microprocessor that measures those current oscillations to derive how far it's traveled.
子弹藏有一块小磁铁和一颗芯片，子弹旋转带动小磁铁产生直流电，芯片通过电流波动感知射程的远近。
Based on the linearized equal area criterion and small signal analysis, the Principle and techniques of Energy Storage System(ESS) Damping Power System Oscillations are proposed in this paper.
基于线性化等面积法则和小干扰分析方法，提出储能系统抑制电力系统低频振荡的原理和方法。
Currently, Power System Stabilizers (PSS) and FACTS damping controllers are widely used to suppress the low frequency oscillations and to improve small signal stability.
目前，电力系统主要采用电力系统稳定器(PSS)和FACTS阻尼控制器来抑制低频振荡，提高系统小扰动稳定性。
Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?
JUNO或RENO-50实验中地球物质效应对反应堆反中微子振荡的影响：多小才算小？
Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?
JUNO或RENO-50实验中地球物质效应对反应堆反中微子振荡的影响：多小才算小？
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