查询词典 P wave

A photonic crystal-air interface or line defect is utilized as a holophote or a partial reflective mirror to design a paralleled plane cavity, a single ring cavity structure and a multi-ring cavity structure. The method has simple design idea, good integration and wide application; by adopting the method, the self aligning photonic crystal lasers with different wave bands can be designed according to the luminescent characteristics of different materials; particularly, the utilization of semiconductor materials to design a light source of optical communication wave bands has more important practical value.

利用光子晶体-空气界面或线缺陷作为全反射或部分反射镜设计平行平面腔、单环形和多环形腔结构；该方法设计思路简单，集成性好，适用范围广，可根据不同材料的发光特性设计不同波段的自准直光子晶体激光器，特别是用半导体材料设计光通讯波段的光源器件具有更重要的实用价值。

The space contraction results in an increase of the wavelength of light. The energy flux density of the light wave decreases with the times of vibration in a unit time while decreases with the number of wave (caused by the increase of the wavelength) in a unit volume (unit length for plane homochromatic waves).

光波的能流密度一方面会随单位时间内波振动次数的减少而减小，另一方面会随单位体积内（对单色平面波就是单位长度内）波的数目的减少而减小。

The behavior of Hunanese in the modern Chinese historical stage reflected a kind of widely known spirit of modern Hunanese, that is, patriotism concerning about his country and his people, sacrificing spirit of advance wave upon wave, realistic spirit of benefiting the nation and practice, firm spirit of being persistent and unyielding and struggling spirit of emphasis on his own effort.

近代湖南人在中国近代历史舞台上的表现，体现了一种广为国人传颂的近代湖南人的精神，即：忧国忧民的爱国精神，前赴后继的牺牲精神，经世致用的求是精神，坚忍不拔的执着精神和自强不息的奋斗精神。

And it is shown that the contribution from ingoing wave is equal to the one from outgoing wave in the radiation spectrum chemical potential term caused by the charged rotating particle.

而且在结果中显示，由带电旋转粒子引起的，辐射谱中类似化学势的项，入射波与出射波的贡献是相等的。

The inial optimizing value is chosed according to Rayleigh wave with dominant energy in the Lamb's problem and the difficulty of calculating the velocity of Rayleigh wave of transversely isotropic saturated soils is solved.

分析表明：瑞利波速在饱和均质半空间具有弥散性，各向异性参数ζ〓、ζ〓对瑞利波速有明显影响，ζ〓在特征频率附近对瑞利波速的影响较大，在高低频区段对瑞利波的影响较小。

The wave function of the phonon is assumed to take thecoherent state,a self-consistent integrodifferential equationsatisfied by the electron wave function is derived.Solving for thisequation,we get the polaron ground-state energy E=-0.1085α2, whichis very close to these of previous strong-coupling theories.In chap.4,we will apply approaches developed in chaps.2 and 3 to discuss theimportant two-dimensional(2D)polaron problem.

把声子部分取成相干态的形式，我们推导出电子波函数所满足的非线性的微分积分方程，求解这个方程，我们得到基态能为E＝-0.1085α2，它与以前的各种强耦合理论的结果非常接近，在第四章中，我们利用在第二，三章中发展的方法讨论很重要的二维极化子问题。

It has been shown that when the theoretical phase shifts are used the poor accuracy in the determination of the interatomic distance is due to the use of the plane-wave rather than the spherical-wave approximation in the EXAFS scattering theory.

研究结果证明：（1）在EXAFS测定C（2×2）S/Ni（100）金属吸附表面结构的数据处理中所发现的理论相移相对实验相移存在的较大误差来自于EXAFS散射理论中所采用的平面波近似。

The main factors effecting on exploration precision of surface wave are analyzed in the light of calculation of phase velocity of surface wave; the merits and demetits of common computing methods for phase velocity between stations and their applied range are discussed and calculation of interstation Green's function for correcting phase is put forward to get the precise phase difference between two stations.

分析了影响面波勘探精度的主要因素，针对计算面波相速度的精度问题，讨论了常用测量台间面波相速度方法的优缺点及其适用范围，并提出通过测量台间格林函数进行相位校正，以得到两台之间的精确相位。

The main factors effecting on exploration precision of surface wave are analyzed in the light of calculation of phase velocity of surface wave; the merits and demetits of common computing methods for phase velocity between stations and their applied range are discussed and calculation of interstation Green's function for correcting phase is put forward to get the precise phase difference between two stations.

分析了影响面波勘探精度的主要因素，针对计算面波相速度的精度问题，讨论了常用测量台间面波相速度方法的优缺点及其适用范围，并提出通过测量台间格林函数进行相位校正，以得到两台之间的精确相位。以合成的高频理论地震图作为记录信号，并在理论地震图上叠加了 2 0 %的随机噪声，利用这些方法分析理论信号，数字实验表明：在相干频率范围内，格林函数方法能够精确测量台间相速度，而互相关法和窄带通滤波互相关法所得结果较为离散。

We selected 223 pairs of Rayleigh wave from 2681 waveforms recorded by 58 tations in the EuroAsia land and west pacific region. The fundamentalmode surface wave was separated using the phasematch for each seismograms. The fundamentalmode interstation attenuation coefficients γ was calculated using the twostation methods.

根据欧亚大陆及西太平洋地区58个数字地震台站2861个长周期波形记录，从中挑选出符合条件的223对经过中国大陆的双台路径记录，采用相匹配滤波和频率域维纳滤波相结合的方法，计算出双台之间的混合路径衰减系数。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。