查询词典 attenuation

Numerical simulation analyzes the rules of the phase velocity and attenuation of the six kinds of ela...

数值模拟分析了6种弹性波的相速度、衰减、液固相振幅比随孔隙度、频率的变化规律以及快P波、快SV波的衰减随流体性质、渗透率、入射角的变化规律。

Codes for estimation of phase velocity and attenuation was written based on the expressions proposed by Gelinsky and others.

在非均匀介质中，阻抗的起伏会导致多孔弹性散射，介质各层压缩系数的变化会引起层内流动。

The initial luminous efficiency of the phosphor increases by about 2%, and reliability of packaged LED is improved, attenuation of luminous efficiency degrades 6%.

结果表明，表面处理使硅酸盐荧光粉的初始发光强度提高约2%，可靠性也有所提高，可使封装后的 LED 的光衰减少6%。

In the work, the laser-behavior under exposure of Ar〓 laser was discussed. The kinetic process of photochemical reaction, intermediate, sensitive process of diazophthoquinon system were studied by laser fluorescence spectrum and laser induced fluorescence attenuation. The nonlinear relation between photodecomposition rate of the system and laser power and concentration of solution was investigated in detail.

论文也进行了感光组成物感激光性能的研究：利用激光荧光光谱及激光诱导荧光衰减法实现了实时探测邻叠氮萘醌型光敏剂感激光光化学过程、中间体的产生与结构以及增感作用的研究，该方法在国内外文献中未见有报道。

To evaluate the role of the right lateral imaging in the attenuation correction of left ventricular inferior wall. The RL imaging were obtained immediately after the supine imaging. The inferior wall configuration and regional myocardial counts were assessed by tomography imaging and quantitative polar map analysis for 31 normal controls and 22 coronary artery disease patients all with coronary arteriography.

为探讨右侧卧位对左室下壁心肌衰减校正和心梗诊断的价值，对31名正常者和22名冠心病病人同时进行了仰卧位和右侧卧位的99mTc-MIBI静息心肌显像，病人均作了冠状动脉血管造影。

But the power of generator and degree of vacuum almost do not affect the horizontally polarized wave attenuation.

真空度和发生器功率对水平极化电磁波没有显著影响。

The mass flow rate and power of generator and the background pressure affect the attenuation of vertically polarized wave.

发生器流量、功率以及实验真空度对垂直极化电磁波在等离子体中的衰减影响明显。

The microwave test method of space reflective wave was applied to study the attenuation characteristics of differently polarized wave scattered by microwave argon plasma jet in vacuum and its influencing factors.

在真空环境中，利用空间反射电磁波测量装置，开展微波等离子体喷流对垂直和水平极化电磁波衰减的实验研究，分析不同极化电磁波在等离子体中衰减的影响因素。

The influence of the various attenuation length and the angle of the polarizer on the contrast of the objects are also discussed in this paper.

在大气介质中，某些微波遥感系统除了利用信号的强度和位相特征外，还利用信号的偏振特性，以便获得更多的信息。

Objective: Attenuation correction is one of the most important corrections in the quantification of positron emission tomography.

目的：在正子断层扫描之定量分析中，衰减修正为最重要的修正之一。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。