harmonic vibration

We show that the intermediate-range force at centrical region of a spheric shell is centrifugal or centripetal, thus this region is the vacuum region or the region of the simple harmonic vibration of the particle whose vibrational frequency is an observable value;

指出球壳的中心区的中程力是离心的或向心的，因而为粒子的真空区或简振区，其振动频率是一个可观察值。

Adjustable tuyere creates a advantaged condition for smelting operation of cupola. To avoid the harmonic vibration of air, the low resistance adjustable air exit is used.

采用涡螺式风箱、低阻压式可调风口等措施，防止产生风啸和不谐振动；

The Effect on the Amplitude of Vibration Span of Resonance-Approached of Simple Harmonic Vibration of Undamped Single-Degree-of-Freedom System

振动时间对无阻尼单自由度简谐振动共振时振幅的影响

The Study on Simple Harmonic Vibration and Simple Harmonic Wave(ⅰ)

关于简谐振动和简谐波的研究（Ⅰ）

The Optimization of Parameters for a Belleville Spring Absorber under Harmonic Vibration

简谐振动时碟簧吸振器参数优化