In this paper we study matter wave diffraction with a quantum mechanical approach.

The researches of compress effect on near light wave diffraction field

近光学衍射场的压缩效应研究

On the Second Order Wave Diffraction in Two Layer Fluids

关于二层海中的二阶波浪绕射问题

Numerical Simulation of Infinite Similar Element Method on Wave Diffraction

波浪绕射问题的无限相似单元数值模拟

" Adversity shows insight," Thank you help me tide over their difficulties!

“患难见真知”，谢谢你帮我度过难关！

No matter what will happen then, we must work together to tide over their difficulties.

不管将来会发生什么事，我们都要一起度过难关。

It must be magic power that helped him tide over the difficulties.

肯定是磨力帮助他度过了道道难关。

Therefore, cost control has become the only way for enterprises to tide over the difficulties.

因此，控制成本成为企业渡过难关的必由之路。

Without their help we wouldn't be able to tide over our difficulties in carrying out the task.

要是没有他们的帮助，我们在完成这项任务时就会有好多困难克服不了。

At a time when people are worrying about their future, the government must make genuine and vigorous efforts to help them tide over difficulties and lead them on the road to happiness.

当市民对自己的前景感到忧虑的时候，政府更需要拿出坦诚和活力，坚定地带领大家走出难关，重新踏上通往幸福的康庄大道。

So long as people exist, we can surely tide over difficulties and conquer the major natural disaster.

只要人在，我们就一定能够渡过难关，战胜这场重大自然灾害。

According to the author, explains the security and economic difficulty problem exists between more than one path.

依笔者之见，破解担保与经济确有困难之间存在难题的路径不止一种。

Comparatively, this problem is purely economic difficulty in western countries.

比较而言，这个难题对于西方国家来说是一种较为单纯的经济问题。

In the1980s, American farmers entered a period of economic difficulty.

80年代美国农民进入经济困难时期。

The Analysis of Technical Difficulty and Project Practice in Foundation Pit Design and Construction

深基坑工程设计施工中技术难点分析与工程实践

This also lies the technical difficulty of the project.

这也是本工程的重要技术难点。

However, the technical difficulty of the hole density perforating.

然而，高孔密射孔器的技术难度相对较大。

However, its technical difficulty and construction more difficult, economic indicators have also increased.

但是，其技术难度和施工难度加大，经济指标也加大。

Noise Analysis of Differentiator Amplifier and Consideration to Application of Low Noise

差分放大器的噪声分析及低噪声运用考虑

Theoretical analysis and numerical examples show that the marching method is valid if the eigenvalues of the two-order partial differentiation operator is exactly approximated.

理论分析及数值实例显示，如果离散格式能够精确逼近二阶偏导算子的特征值，步进方法对高频波传播计算是有效的。

The dynamic coefficients of tilting pad guide bearings are derived with the help of finite-elements using pressure parameters partial differentiation.

本文采用有限元法，利用压力参数法和偏导数法直接推求分块可倾瓦导轴承的动力特性系数。