Coherent properties for excitons and for free carriers in intrinsic bulk GaAs are studied with femtosecond free induction decay (FID).
实验与理论分析结果表明: 对于均匀增宽的二能级体系, 这种测量方法可以直接反映相干态的自由感应衰减。
Monte Carlo simulation has been carried out to get the free induction decay and photon echo decay for a system of A spins, isolated from each other, whose resonant frequency fluctuates because of the flipping of a surrounding B spins.
动态微扰可以引起跃迁频率发生变化,产生光谱扩散,我们用Monte Carlo法模拟了由于频率变化引起的自由感应衰减和光子回波衰减。
A micro-cantilever and a micro-membrane, which are both attached with piezoelectric devices, are excited respectively by the ramp pulse signal and produce free damping motion.
附有压电驱动的微悬臂梁和微振动薄膜在斜波脉冲激励信号作用下产生自由衰减振动,通过激光多普勒测振仪将瞬态运动速度转换为模拟信号,经数据采集卡数字化后送入计算机,对其振动特性进行分析。
free damping oscillation vibrometer
自由衰减振荡示振仪
Free Damping Test Method for Vibration Characteristics of Microstructures;
微结构振动特性的自由衰减测试方法
Analysis of FID Signal in Pulse NMR Experiment;
脉冲核磁共振实验自由衰减信号分析
Two kinds of concrete specimens, one is crumb rubber concrete( CRC) and the other is controlled concrete, are tested as a cantilever beam for measuring their damping coefficients by the free attenuation method.
本文采用自由衰减法,对两组橡胶集料混凝土及普通混凝土小型悬臂梁的阻尼比进行了测定。
Degenerative Transfer (DT) Polymerization of Vinyl Acetate;
衰减链转移自由基（DT）聚合醋酸乙烯酯
Numerical Simulation of Ship Free Roll Decay Motion in Viscous Flow
黏性流中船舶自由横摇衰减运动数值模拟
The Atom Transfer Radical Polymerization and Degenerative Transfer Polymerization Initiated by Initiator Formed in Situ
原位合成引发剂引发原子转移自由基及衰减链转移同步聚合
The Energy Decay of Cantilever Timoshenko Beam with Local Viscoelastic Damping on the Free End
自由端具有局部粘弹性阻尼的悬臂Timoshenko梁的能量衰减问题的研究
High amplitude noise attenuation based on Gabor transform
基于Gabor变换自适应噪声衰减
Local characteristics in converging-diverging tube with delaying self-sustaining swirl flow
缩放管内带衰减性自旋流的局部性能
Automatic Testing System of Attenuator Based on Visual Basic 6.0
基于Visual Basic 6.0的衰减器自动校准系统
Automatic Calibration of Large Attenuation Based on Visual Basic 6.0
基于Visual Basic 6.0的大衰减量的自动校准
attenuation compensator
衰减均衡器衰减补偿器
The slope of attenuation is determined by the order of the filter.
衰减的斜率是由滤波器的阶数所决定的。
Nor need demographic decline imply economic decline.
由人口的减少来推断经济的衰退是没有必要的。
Free Radical Mechanism of Aging and The Positive Effect of Exercise On Retarding Aging;
衰老自由基学说和运动对抗自由基损伤的作用
A Sign of British Decline: The End of Laissez-Faire;
英国衰落的标志:自由放任政策的终结
Rise and Fall --On the Ups and Downs of New Liberalism;
潮起潮落——谈新自由主义的兴起与衰落