1) slowly varying amplitude approximation
缓变振幅近似
1.
The expressions of Gaussian beam are obtained respectively by using Fresnel diffraction integral and Helmholtz e-quation under the circumstances of slowly varying amplitude approximation.
使用菲涅耳衍射积分公式,推导出在自由空间传播的高斯光束表达式,与用亥姆霍兹方程在缓变振幅近似下求得的结果作比较,得出在计算高斯光束时两种近似方法是等效的,计算时可以根据需要进行适当的选择。
3) coupled amplitude approximation
耦合振幅近似
4) slowly-varying envelope approximation
缓变包络近似
1.
We show the invalidation of the slowly-varying envelope approximation (SVEA) theory because it leads to the spatial singularity of the ultrashort pulsed-beam solution and is inconsistent with the physical significance of the beam propagation.
结果显示 ,在此情况下缓变包络近似理论已不再有效 ,其失效的原因是 ,该理论导致了脉冲光束解的空间奇异性 ,并使脉冲光束不再具有符合物理意义的光束行为 ,而通过复解析信号的分析方法可以消除这种空间奇异性 。
5) strain amplitude
应变振幅
1.
Influence of different boundary conditions and strain amplitudes on the structural internal friction of anisotropic laminated damped structures;
不同边界条件和应变振幅对各向异性层合阻尼结构内耗的影响
2.
Influences of strain amplitude on damping capacity of SiC_p/Al composite;
SiC_p/Al室温阻尼性能与应变振幅的相关性
3.
According to endochronic theory, the relationship between attenuation and strain amplitude of rock samples can be briefly at intermediate strain levels by introducing an inelastic parameter α.
根据内时理论,简要推导了在中等应变条件下,岩石衰减与应变振幅的用非弹性参数α表示的具体关系式。
6) amplitude jump
振幅突变
1.
The shapes,maximum amplitude,stability and amplitude jump of main resonance are analyzed.
分析了主共振的振型、最大振幅、稳定性和振幅突变性。
补充资料：缓变pn结（gradedp-njunction）
缓变pn结（gradedp-njunction）
从p区到n区掺杂浓度逐渐改变的pn结，如用固态扩散工艺制造的pn结。大多数缓变pn结数学上可作为线性缓变结处理。通常由扩散工艺制备的pn结为缓变pn结，但在浅扩散结或高反偏时它更接近于单边突变pn结。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条