查询词典 P wave

Correlation of drillability anisotropy index of the roller cone bit and PDC bit, the difference between drillability of the roller cone bit in perpendicular and horizontal directions of the bedding plane with the P-wave velocity anisotropy coefficient are studied respectively by means of mathematical statistics. A mathematical model is established for predicting drillability anisotropy index by using P-wave velocity anisotropy coefficient.

用数理统计方法研究分析了牙轮钻头岩石可钻性各向异性指数、牙轮钻头垂直于和平行于地层层面方向岩石可钻性差值和PDC钻头岩石可钻性各向异性指数与纵波波速各向异性系数的相关关系，建立了用纵波波速各向异性系数评价地层可钻性各向异性的模型。

The innovative points include of this dissertation is introducing the x-p transformation into transient Rayleigh wave method to improve the extracting effect of fundamental surface wave; utilizing several methods to suppress alias and leverage point effects to raise the signal-to-noise.

本文的主要创新点：在瞬态瑞雷面波资料处理过程中入τ-p正、反变换，提高了面波基波的提取效果；综合使用多种压制假频和端点效应的方法，提高了地震资料的信噪比。

The comparison of blood loss and operation score between two neighboring groups both showed no significance. Also, we found significant difference between group4 and group 7, as well as group5 and group 7 in their operative time comparison (P=0.045 and 0.028, respectively). No complications but a slight subcutaneous emphysema happened on the 21 cases.3. When the electronic pulse-wave mode insufflator is working, IAP of patients may reach 40mmHg, more than twice of the setting point, 15mmHg.

相邻两组的手术时间比较为第5组与第6组间差异有显著性(P=0.034)，相邻两组的出血量比较差异均无显著性(P值分别为0.273，0.607，0.731，0.494，0.863，0.494)，相邻两组的手术得分比较差异均无显著性P值分别为0.761，0.729，0.344，0.873，0.074，0.816非相邻组别的手术时间比较为第4组与第7组、第5组与第7组间差异有显著性(P值分别为0.045，0.028。

The amplitude of wave before repeat wave was increased, the height of dicrotic notch was increased, there was obvious difference compared with the control groupP

与弦脉比较，紧脉重搏前波波幅及降中波波幅增高明显（P＜0.01）；而主波宽度不如弦脉增加明显（P＜0.01）。

Summer monsoon precipitation in 1998 is simulated with different soil temperature and solar short wave radiation parameterization schemes using the improved p-σ nine level hybrid coordinate model.It is found that the improved soil temperature calculation method together with Lacis and Hansen short wave radiation parameterization has a good simulation for precipitation.

利用改进后的p-σ 9层混合坐标系模式，采用不同的土壤温度与太阳短波辐射参数化方案，对1998年夏季风降水进行模拟，发现改进的土壤温度计算法和改进的Lacis和Hansen 短波辐射参数化方法相结合能较好地模拟降水。

In this paper, those teleseismic records with clear P waveforms are chosen to carry out receiver function analysis and modeling. A simple crustal structure model beneath the station is obtained, in which the Moho depth is 28 km. On the top of the upper crust is a 2 kmthick low velocity layer with a shear wave velocity of only 23 km/s. The shear wave velocity increases gradually with depth to 38 km/s in the lower crust.

本文对具有清晰P波波形的远震记录进行了接收函数处理和计算模拟，得到台站下简单的地壳结构模型，其莫霍面深度为28 km，上地壳顶部有一层2 km厚的低速层，横波速度只有23 km/s，向下逐渐过渡到横波速度为38 km/s的下地壳。

The paper has studyed the characteristics of seismic wave field in the media of EDA, and has made out three aspects of numerical simulation on wave field features by using definite difference: The simulation of P-wave ground seismic logs in the media of EDA; the diagnostic complication of seismic wave field in cranny belts due to the scattering of cranny wrappage; the decreasing of amplitude and the reversing of polarity of the wave reflected on not only the top but also the bottom of fracture zone.

2通过罗67井岩芯的系统研究表明，泥岩的横波和纵波速度随温度增大而降低，一定温度条件下随为压力而增大；泥岩裂缝的测井曲线一般表现为高电阻率、负自然电位异常、低声波时差，利用该规律可以半量定地识别划分泥岩裂缝储层特征，为解决不同度数据的相互匹配这一重点和难点问题提供了思路和方法。

This kind of gratings can be kept in the material for a long time. A mode of molecular reorientation was used to explain the formation mechanism of these gratings and it is well consistent with our experimental results. 3. Three kinds of azobenzene polymers P , P (MMA-co-GY7) and P (MMA-co-GO13) were synthesized by radical polymerization. High-density optical storage and the three-dimension (3D) microstructures in the azobenzene polymer films were presented. Twenty gratings have been stored on the same spot in our material. It is twice as many as the best recording that has been reported. It is the first time, a rectangular microstructure and a complicated double layers nesting six-pointed star microstructure are inscribed in it by using a simple two-wave couple setup.

采用共聚反应设计合成了单偶氮苯聚合物P、双偶氮苯聚合物P（MMA-co-GY7）和P（MMA-co-GO13）三种聚合物，研究了偶氮苯聚合物薄膜中的高密度光学存储和3维微结构，成功的将20套光栅储存在样品中同一个点上，是已有报道的两倍；并首次用简单的2波混频光路在该材料中刻写出长方格子和六角星型的微结构，在制作多重不同周期不同角度的高密度光栅结构实验过程中，发现不同周期光栅的刻写顺序对整个微结构形成的最终结果具有决定性的影响，并用相衬显微镜观察了这些微结构图像。

Bius digital base band communication system of five often used modem function set, those are the even and odd symmetrical triangle wave, even and odd symmetrical square wave and saw-tooth wave and their inverse transforms, are simulated 10000 times, and the fluctuation ranges of the error rate P(subscript b are observed.

bius数字基带通信系统中偶对称三角波、奇对称三角波、偶对称方波、奇对称方波和锯齿波这5种常用的调制解调函数族及其逆变换进行仿真1万次，观察错误概率P

But the dependency of the first type compression wave and the shear wave is much smaller than that of the second type compression wave.

通过对比u-w和u-p方程的结果，首次定量说明了u-p方程适用于包含地震工程在内的大多数工程问题。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。