1)Radiation damping辐射阻尼
1.Random vibration analysis of arch dam in consideration of radiation damping;考虑辐射阻尼的拱坝随机振动分析
2.Effects of foundation radiation damping and reservoir level on arch dam nonlinear seismic response;地基辐射阻尼和库水对拱坝非线性地震响应的影响
3.Effects of radiation damping of infinite foundation on seismic response of the Xiluodu arch dam;无限地基辐射阻尼对溪洛渡拱坝地震响应的影响
英文短句/例句
1.electromagnetic mass and radiation damping电磁质量和辐射阻尼
2.The damping force of radiation is a jumpulse of the time rate of change of force.“辐射阻尼力”是一种力变率的猝量。
3.Effect of radiation damping on seismic response of structures地基辐射阻尼对结构地震响应的影响
4.Study of the acoustic radiation damping of fluid-loaded plate in the acoustic radiation modes condition轻/重流体介质中振动板声辐射模态下的声辐射阻尼研究
5.Effect of radiation damping on nonlinear response of high arch dams地基辐射阻尼对高拱坝非线性地震反应的影响
6.Study on Random Seismic Responses of Arch Dams Considering Radiation Damping of Infinite Canyon;考虑无限地基辐射阻尼的拱坝随机地震响应规律性研究
7.Hydraulic Vibration Analysis of Bulb Tubular Pump-houses Considering Foundation Radiation Damping考虑地基辐射阻尼的灯泡贯流泵房水力振动分析
8.Vibration and acoustic analysis of plate with viscoelastic damping treatment敷设粘弹性阻尼的板的振动与声辐射分析
9.Research on the Vibration Passing and Sound Radiation of the Double Cylindrical Shell敷设阻尼材料的圆柱壳声辐射性能实验分析
10.Effects of hydrostatic pressure and damping material on acoustic radiation of cylindrical shell静水压与阻尼覆盖层对圆柱壳声辐射的影响
11.occipitothalamic radiation(视辐射线) 韦尼克氏放射
12.Sound Radiation Analysis of Ribbed Cylindrical Shells with Viscoelastic Layer and Noise Characteristics Analysis;敷设阻尼层的加肋圆柱壳辐射性能及噪声特性分析
13.Sound Radiation Analysis of Finite Cylindrical Shells Partially Covered with Viscoelastic Layer in Fluid;部分敷设阻尼材料有限长圆柱壳在流场中声辐射性能分析
14.Analysis of Sound Power Sensitivity of Viscoelastic Damping Plates Based on Acoustic Radiation Modes基于声辐射模态分析粘弹性阻尼板的声功率灵敏度
15.graphite resistor radiation furnace石墨电阻辐射加热炉
16.Radiation Impedance of Flexural Thin Circular Flat Plate with Fixed Boundary固定边界弯曲振动圆盘辐射阻抗研究
17.UCRL (University of California,Lawrence Radiation Laboratory)加利福尼亚大学劳伦斯辐射实验室
18.Radiation Impedance and Acoustic Radiation Power of the Simply Four-side-supported Square Thin Plate in Flexural Vibration;四边简支弯曲振动方形薄板辐射阻抗及辐射声功率的研究
相关短句/例句
damping radiation阻尼辐射
3)acoustic radiation damping声辐射阻尼
1.A study on the variations of acoustic radiation damping of a damaged stiffened plate;含损伤加筋板结构声辐射阻尼变异研究
2.Study of the acoustic radiation damping of fluid-loaded plate in the acoustic radiation modes condition轻/重流体介质中振动板声辐射模态下的声辐射阻尼研究
4)radiation damping force辐射阻尼力
5)radiation damping of foundation地基辐射阻尼
6)RD effects辐射阻尼效应
1.According to the analytical solutions of classical Bloch equations and the numeric solutions of extended Bloch equations with radiation damping (RD) effects, the effects of longitudinal relaxation on nuclear magnetic resonance (NMR) lineshape are theoretically studied when radio frequency (RF) field irradiation or RD effects must be considered.根据经典Bloch方程的解析解以及考虑辐射阻尼效应的Bloch方程的数值解 ,通过解析分析和数值模拟 ,从理论上研究了在射频场扰动下以及在辐射阻尼效应的作用下纵向弛豫对核磁共振线型的影响。
延伸阅读
辐射阻尼 因辐射引起一个发射体系的运动的衰减，是谱线致宽的主要原因之一。经典电动力学理论把发射(或吸收)光的原子当作谐振子，辐射是由激发谱振子的振动产生的。由于辐射，谐振子受到阻尼力的作用，结果辐射出的电磁波的振幅不断衰减，这样就会得到具有一定宽度的谱线。角频率为ω0的谐振子的能量消耗规律为 E(t)=，式中t为时间，E0为初始能量,为阻尼常数，e、me、c分别为电子电荷、电子质量和光速。辐射强度I(w)与角频率的关系为： 。因为在角频率间隔处I(w)减小到一半,所以称为谱线的半宽,γ 称为全半宽。以波长标度表示的谱线全半宽γ＝1.17×10-4埃，是一个和波长无关的常数。这个宽度又称为谱线的自然宽度。由经典辐射阻尼理论得到的吸收系数，按频率的分布形式与上式类似。近代量子力学理论认为，谱线是由原子分立能级间的跃迁引起的。原子在各能级上只能停留一有限的时间Δt。根据测不准关系，原子能级不应是无限窄的，而是有一定的宽度。这就使得两个能级的跃迁不可能是单一频率的辐射,而存在一定的频率间隔。因此,由原子能级跃迁所形成的谱线便有一定宽度和形状。量子力学理论得出的谱线形状与经典电动力学理论得出的相同。不过，阻尼常数γ =γi+γk,。τi和τk分别为初态和末态的平均寿命。γi或γk决定于跃迁概率，它等于单位时间内原子离开该能级的所有可能跃迁总概率。
