谐振的

By performing appropriate time-dependent gauge transformation,closed formulas for the time evolution of quantum states and Berry phases are obtained.

通过适当的含时规范变换得到有限维含时谐振子量子态时间演化的封闭解，并给出量子态的Berry相位。

The dissertation is about the identification of its controlled model and its resonant frequency point by the direct use of computer control system of the tracking gimbal from engineering application aspect.

论文从工程应用角度上直接利用跟踪转台的计算机控制系统，辨识其用于计算机控制的二阶模型以及系统的机械谐振频率点。

The results of the relation curves describe the relationships of the dimensions vs maximum displacement of the mass, the dimensions vs resonant frequency and the forced vibration responding of the mass's harmonic curve were also given.

同时，拟合出了悬臂梁及质量块的结构参数与质量块最大位移量和谐振频率的关系曲线，以及质量块受迫振动的谐响应曲线。

Simple harmonic motion is the motion executed by a particle of mass m subject to a force that is proportional to the displacement of the particle but opposite in sign.

简谐振动是指质量为m的质点-该质点承受一种与其位移成正比而方向相反的力作用-的运动。

The University of Minnesota team, including collaborators Andriana Lehr and Andrew Oxenham, was able to independently manipulate both the harmonic frequency relations of the sounds and another quality known as beating.

明尼苏达大学的团队，包括合作者安德里亚娜莱尔和安德鲁奥克斯纳姆，能够独立操作的声音，另外两个谐振频率的关系质量称为跳动。

Switching power amplifier of magnetic bearing worked in hard switching. To overcome drawbacks of large loss of switching and current harmonic distortion, a parallel resonant DC link soft-switching power amplifier was adopted in this paper.

为克服磁悬浮轴承开关功率放大器工作在硬开关状态时存在的开关损耗和电流纹波干扰严重的缺点，提出一种磁悬浮轴承并联谐振直流环节的软开关功率放大器电路。

In Magneto hydrodynamicsgeneration a conductive gas is directed through a magnetic field AND a potential is developed.

谐振腔中的强磁场是激发起固体中电子和原子核的自旋和轨道运动的理想环境。

A kind of weak current sensor using a single amorphous core double-winding multivibrator bridge is studied in this paper.

对采用非晶丝单磁芯双线圈多谐振荡桥制成的弱电流传感器进行了研究：对传感器的工作原理进行了分析，对传感器的信号处理电路进行了设计。

Firstly, based on general equivalent circuit model for coupled resonator filters, the synthesis is discussed using the orthogonal transformation of the coupling matrix.

首先，通过分析交叉耦合谐振滤波器的等效电路模型，给出了滤波器电路参数与散射参数之间的函数关系和利用正交变换综合设计滤波器的方法。

The aim of this research is to use DC link parallel resonance three---phase soft---switching technique to realize in inverter.

本研究课题的目标是三相软开关变频器DC直流环节的并联谐振，实现逆变桥上每个功率开关器件以零电压方式开通，达到软开关的目的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。