查询词典 propagation of errors

Based on wave propagation feature, this paper analyses 3D seismic migration algorithms such as alternating direction implicit method, LU decomposition method, and inverse operator approach method. The result shows that the alternating direction implicit method is fast but causes distortion in wave field extrapolation and affects image accuracy; however LU decomposition and inverse operator approach methods are fast while holding circular symmetry of wave field, and are promising in oilfield exploration and development.

在波的传播特征分析基础上，对交替方向隐式法、LU分解法、逆算子逼近法等三维地震偏移算法进行了分析研究，结果表明，交替方向隐式法虽然快捷但是在波场外推中明显产生畸变并影响成像的准确性，而LU分解和逆算子逼近法是保持波场圆对称特征前提下的快速算法，在油田勘探开发中具有较好的应用前景。

Each ambient noise model consists of a sound source model and a sound propagation model.

每一个环境噪声模型都包含噪声源模型和传播模型两部分。

In this thesis we investigate the beam propagation and amphoteric refraction in a Uniaxially anisotropic crystal.

本文在理论上研究了单轴晶体中的光束传输和正负折射现象。

Anechoic chamber is the primary test site of electromagnetic radiation measurement, also the important facility for antenna and wave propagation research.

电波暗室是辐射电磁场的主要测量场地，也是研究天线与电波传播特性的重要试验设施。

A deflection angle of acoustooptical Bragg diffraction on an acoustic-optical medium is modulated by ultrasonic, and on the other hand, surface acoustic wave propagation velocity can be influenced by rotational velocity Ω of SAW medium.

摘 要：声表面波陀螺效应表现为SAW介质旋转角速度Ω对SAW波速的调制作用，以及对布拉格衍射角的调制作用。

Figure 15 after the installation of projection angle control agencies, supplemented by the net back propagation algorithms, mobile robot path, projected position and hit the target or diagram (circular icon that hit the target location, location triangle icon that did not hit the target)...

图15 加装投射角控制机构后，并辅以经网之倒传递演算法则，机器人移动径，投射位置与命中目标物与否示意图(圆形图示位置表示命中目标物，三角形图示位置表示未命中目标物)。。。。

The pulse width broadening of the femtosecond laser after angular dispersion wasdescribed,the pulse width expression at arbitrary propagation distance was provided,the pulse width broadening of the femtosecond laser by AOD was precisely predicted,thegeneral theory on pulse width broadening of plane wave,spherical wave and Gaussianbeam was deduced and the physical mechanism of pulse width broadening based on eachabove light beam model was revealed.

本文对随机扫描双光子显微镜中飞秒激光传输特性进行了系统深入的研究，完整解决了这一理论问题，发现了空间与时间色散通过角色散耦合的规律，为空间与时间色散同时补偿的方案提供了理论依据，基于此原理的单个角色散器件同时补偿空间和时间色散的方案高效解决了声光偏转器的色散补偿这一核心难题，为建立随机扫描双光子显微成像装置并应用于神经学研究奠定了基础：阐明了飞秒激光经角色散后的光斑展宽规律，获得任意传输距离处的光斑解析式，精确预测了声光偏转器对飞秒激光的光斑展宽，并揭示了光斑展宽的物理机制。

Based on the food chain relationship between nutrition, autotrophy and detritus biomass, considering the complementarity of the nutrition which is caused by the animalcule decomposition of the propagation reliquiae, as well as its losing caused by physical therapies, we set up a model of zoology dynamics about the reciprocity of nutrition-autotrophy-detritus biomass, and analyze the dynamical stability of the model solution by using modern nonlinear theory.

基于营养盐、赤潮藻类、碎屑的生物量之间的食物链关系，考虑到由于海洋内微生物分解动植物遗体对营养盐的补充以及物理因素导致的流失，建立了营养盐－赤潮藻类－碎屑的生物量相互作用的耦合生态动力学模型。运用现代非线性动力学理论，对模型解的动力学稳定性进行了分析。

In recent years, the study of light propagation in anisotropic media has attracted a good deal of attention.

晶体中的光传输问题一直吸引着人们的浓厚兴趣。

Thus, it would be ofimportant significance to study the propagation properties of annular beams.

因此，研究环状光束的传输变换特性具有重要意义。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。