分解

However the computation of the finite element method is very complex when dealing high-dimensional problems. So that in order to solve the multi-variables problems, the alternating- direction method appears. It can lower the dimension.

有限元方法虽然具有高精度的优点，但是在处理高维问题时计算很复杂，因此为求解多变量的复杂问题，出现了交替方向法，可以把多维问题降维，分解成连续解几个一维问题。

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。

The PSF values can be estimated by alternating iterative minimizing the objective function, and the object images can be restored by the constrained least-squares filtering method.

将小波变换与分解的多分辨特性和时频局部化特性应用在湍流退化图像的盲目复原中，降低了算法的计算复杂性并提高了其抗噪能力。

Moreover, it is an effective and reliable method to analyze signals with spectrum on the basis of wavelet alternation.

此外，在小波变换的基础上对小波分解系数再进行常规谱分析是一种有效的故障诊断方法。

Decomposition of supersaturated sodium aluminate solution is one of the most important procedures in the production of alumina.

过饱和铝酸钠溶液分解是氧化铝生产过机理的研究是氧化铝生产过程的重要基础问题。

The factors that have effect on seed precipitation of sodium aluminate solution have been systematically discussed in this paper.

系统介绍了影响晶种分解过程的主要因素以及国内外在这方面的新的研究成果。

It is an important process for seeded precipitation in sodium aluminate solutions.

氧化铝生产过程中，铝酸钠溶液的晶种分解是一个非常重要的过程。

A systematical summary is made of the advances in research on decomposition mechanism of solution aluminate seeds.

系统总结了铝酸钠溶液种分过程的溶液结构及分解机理的研究进展。

The paper researches the mechanism of anion surfac tant in sodium aluminate solution decomposition process.

目的研究铝酸钠溶液晶种分解过程中阴离子表面活性剂的作用机理。

Effect of NH4Cl on phase transformation of Al2O3 obtained from ammonium aluminum carbonate hydroxide has been studied.

利用 NH4Cl 其分解时释放气体的特点控制以碳酸铝铵为前驱体的氧化铝α相变过程中的团聚。

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。