查询词典 damping

In this paper, we will discuss the existing condition of the periodic solution of Duffing type equation with damping term. We use homeomorphism and fixed point method to prove the periodic solutions existence. We try to loose its condition, analysis and then get the existing condition of periodic solution according to defining atmospheric dynamics equation.

本文中，我们探讨带阻尼项的Duffing型方程周期解的存在性条件，运用不动点方法和Leray-Schauder度理论来证明其存在周期解，尽可能放宽其约束条件，并针对具体的大气动力学方程，分析并求取其周期解的存在性条件。

Then, based on a large number of static and dynamic laboratory test results, the calculation formulation on dynamic modules of shear deformation, damping ratio, dynamic pore water pressure, dynamic residual deformation are proposed, the parameters of these formulations are also given.

在此基础上，对粉煤灰进行了大量的动力特性试验研究，提出了该类粉煤灰相应的动模量及阻尼比的计算公式并给出其抗液化强度、动孔隙水压力及动残余应变的计算公式及其参数。

Firstly, based on the wave equation, determining reasonably its initial boundary condition, the paper establishes a computer diagnostic model of oil pumping mechanical well, the damping factor in the model has been reasonably determined, the implicit difference solutionis conducted to the model by changing of step width expression difference solves, and the half analytical solution is explored to the model - fine integral method; and realizes the transformation from dot indicator diagram to indicator diagram of any section.

首先从抽油机井计算机诊断技术的理论基础入手，考虑多级抽油杆连续性，建立了粘滞阻尼波动方程，合理确定模型中的阻尼系数，采用无条件稳定的隐式差分法及半解析方法求解方程，获得抽油杆柱任意断面和抽油泵处的示功图。

The VE materials have the damping character that the strain is delayed to the stress, so the VE damper and energy dissipation brace are basically a kind of velocity dependent device of suppressing vibration and energy dissipation which can be used in aseismic and wind-resistant design.

粘弹性材料具有应变滞后于应力的阻尼特性，由它构成的粘弹性阻尼器及消能支撑是一种基本上与速度相关的减振装置，可用于抗风振也可用于抗震。

Then the uncertainty of modal frequency and modal damping in the controlled subsystem was expressed as a diagonal structure in the form of linear fraction transform.

最后通过最小化一个结构奇异值μ得到的控制器，以保证具有上述混合不确定性的闭环系统稳定并满足鲁棒性能要求。

Moreover, when the normalized damping matrix is diagonally dominant, it is strictly shown that decoupling the modal equations by neglecting the off-diagonal elements indeed minimizes the error upper bound.

同时，还严格地证明了，当正则化的模态阻尼矩阵是对角占优时，由忽略其非对角线元素使模态方程解耦的方法所引起的误差的上限的确能达到最小。

Through experiment, rational joint technology was defined and matrix of diamond saw blade with noise damping was prepared.

试验出合理的基体连接工艺，并成功地制备出具有消音功能的金刚石锯片的基体。

The results show that the nonlinear diffusive phenomenacaused by frictional damping is also true in the presence of boundaryeffects.

以往的结果（[50]）是该结果的一个特例，所用方法已被推广用于解决多孔介质中的可压缩流方程组的初边值问题（[43]）。

The shroud dry friction damping factor is a dimensionless quantity which can be defined as the ratio of the sum of work done per cycle of vibration by all dry friction force at shroud interface to the peak strain energy of corresponding blades under the resonance condition.

干摩擦阻尼因子是一个无量纲量，它被定义为：在共振条件下，所有的凸肩干摩擦力在振动一周内所做功之和与对应叶片系统峰值弹性变形能之比。

Damping identification ; Transfer function ; Spectrum analysis ; Discrete spectrum ; Signal processing

阻尼识别；传递函数；频谱分析；离散频谱；信号处理

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％。