查询词典 damping-off

The air damping analysis of the fence structural micromachined vibratory rate gyroscope shows that the air damping in the driving mode and the sensing mode of the device is slide film damping mainly, therefore the coefficient of damping force is comparatively little, and the quality factor of both them is close to.

栅结构微机械陀螺的空气阻尼分析表明，陀螺的驱动模态和检测模态受到的空气阻尼主要是滑膜空气阻尼，因此陀螺系统的驱动模态和检测模态的阻尼力系数较小，并且两者的品质因子接近。

Phytophthora capsici is an important fungal pathogen that causes seed rot, seedling damping-off, root and crown rot, leaf spots, stem lesions, foliar blight, and fruit rot in many solanaceous crops and cucurbits (cantaloupe, cucumber, summer squash, pumpkin, watermelon). Rottingof seedlings prior to emergence (preemergence damping-off) and blighting of recently emerged seedlings (postemergence damping-off) can occur.

茄科疫病菌为一重要病原真菌，其在许多茄科作物与葫芦科作物(如哈密瓜、胡瓜、栉瓜、南瓜、西瓜)中会引起种腐病及种苗的猝倒、根腐及冠腐、叶斑、茎部病灶、叶枯和果腐病，而幼苗前猝倒病与后猝倒病亦皆会发生。

It is worth to be noted that the needed driving current to the MR valve with both annular and radial damping gaps is less than that to the MR valve with annular damping gaps under the cut-off state of the MR valves, which show that the MR valve with both annular and radial damping gaps consumes less energy.

测试结果显示：（1）在相同的工作条件下，同时具有圆环和圆盘阻尼间隙的磁流变阀产生的压降更明显；（2）处于截止状态时，同时具有圆环和圆盘阻尼间隙的磁流变阀的激励电流明显小于具有圆环阻尼间隙的磁流变阀的激励电流，因此采用同时具有圆环和圆盘阻尼间隙的磁流变阀可以节约能量的消耗。

The amplitude has a critical value in its effect on BBD damping, when the amplitude is in excess of the critical value, the damping property of BBD is very good, otherwise, the damping property of BBD is poor.

振幅对BBD阻尼特性的影响有一临界值，当振幅大于此临界值时，BBD的阻尼性能迅速增大，而当振幅小于此临界值时，BBD的阻尼性能较小。

The governing equation of in-plane vibration of cable-restraint system is derived by means of D'Alembert principle, and then those partial differential equations are transformed into a set of ordinary differential equations by Garlerkin method. The method of Runge-Kutta integration is applied to solve the equation. The simulation analysis is made to prove that this vibration control has obvious damping effects and then the influence of cable tension, support mass, natural frequency and spring stiffness on the damping are discussed. Eventually, the approximate analytic solution of the optimum damping parameter is obtained to provide a simple and effective reference and design method for the engineers.

通过D'Alembert原理建立拉索－弹性约束系统振动方程，通过Galerkin方法将偏微分方程转化为常微分方程，应用龙格－库塔积分法求解方程；经过仿真分析，验证了该振动控制具有明显的减振效果，并且讨论了初始拉力、支座质量、振动频率及弹簧刚度对减振效果的影响；最后给出了计算最优阻尼参数的近似解析式，为工程师提供了简便有效的参考依据及设计方法。

Characteristics of free vibration and forced vibration of a damped system with dry frictional damping,viscous damping and c x·2 damping are analyzed and calculated,acceleration response of free-vibration of the dry frictional damped system has a sudden change when x· is zero,the change value is constant and depends only on the natural frequency ωn and the displacement xk due to dry friction.

本文对存在干摩擦阻尼、粘性阻尼和c.x2阻尼系统的自由振动及受迫振动特性进行了解析及数值计算，得到干摩擦阻尼系统自由振动的加速度响应在速度零点有一突变，这一变化量为定值，且只与系统固有频率ωn及摩擦当量位移xk有关。

Vibration-damping property of damping material is related closely to its damping factor and modulus.

阻尼材料的阻尼减振性能和材料的损耗因子和弹性模量密切相关。

Analytical result of structural dynamic response is restricted by selection of damping model. Therefore, the mechanism of damping force and damping parameter identification in a vibrating structure are always an active area of research.

在结构动力响应的分析中，阻尼模型的选取对得到的分析结果具有相当的制约性，因此，结构的阻尼值机理及阻尼参数的识别研究一直倍受关注。

The research results show that stiffness ratio of superstructure and ratio of damping and stiffness in isolated story have great influence on local deformation of structure. It can reduce the local deformation and increase entirety of structure effectively through rational laying rubber bearing and adjusting distribution of stiffness and damping in isolated story. The specific conclusion of the paper is that local deformation of isolated structure becomes minimality when translational stiffness ratio of superstructure is consistent with stiffness ratio of isolated story; and it also can reduce local deformation of minor structure by reducing damping ratio of isolated story properly.

本文研究表明，上部结构的刚度比及隔震层的刚度和阻尼比对结构的局部变形有着很大影响，通过橡胶垫的合理布置，调整隔震层的刚度和阻尼分布，能有效的减小结构的局部变形，提高结构的整体性，从而使隔震效果得以确保；本文的具体结论是，当上部结构的侧移刚度比与隔震垫刚度比一致或相近时，隔震结构的局部变形最小；适当减小子结构的隔震层阻尼比可减小该子结构的局部变形。

In this thesis the dynamic property of viscoelastic damping material was first be explained on the basis of the characteristics of polymer molecular structure. The mathematical models describing the dynamic property of damping material were discussed and the nomogram curve-plotting program of damping property of material was compiled by Visual Basic language.

所以，研究粘弹阻尼结构的动态力学性能，首先要对材料阻尼性能的温度、频率依赖性进行准确的表征，进而才能探讨材料阻尼特性与结构动态力学性能之间的相关关系，以寻求抑制结构振动的内在规律。

Looking to bounce back from defeat against Cesena last weekend, the Calabrian boss will be sticking to his tried and tested 4-3-3, with Lopez and Sedivic joined up front in Giampaolo's absence by either Nanni or Plasmati.

鉴于上周末对切塞纳的比赛中反败为胜，这支南方球队将会更坚持其一贯而有效的4-3-3阵型，洛佩斯和塞德维奇将取代受伤缺席的詹保罗，和纳尼或者帕斯马蒂中的一个搭档锋线。

Meanwhile, their exposure to the more freewheeling ways of the West broadened dramatically.

另外，西方较自由的生活方式对年轻人的影响增大。