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It is important to recall that a sound wave in a nonhomogeneously deformed material cannot be a plane wave.

重要的是要记得，非均匀变形材料中的声波不可能是平面波。

In this paper, the plane wave expansion method has been applied to Lamb wave dispersion relation in multilayer calculations.

本文将平面波展开法推广应用到多层板中兰姆波色散关系的计算。

Based on plane wave decomposition, We propose a wave-equation depth migration method for pre-stack seismic data.

提出了一套基於平面波分解的波动方程叠前地震数据深度偏移方法。

Common phenomenon of optical simulation projects, such as plane wave spherical wave of the simulation, the simulation of some interference.

详细说明：常见的工程光学的现象模拟，如平面波球面波的模拟，一些干涉现象的仿真。

The recording capability with the spherical wave is larger than with the plane wave.

以上分析是数字全息记录光路设计的主要依据。

Company's main products are: plug-in line, belt assembly line, wave soldering, hot air reflow, tooling plate differential chain assembly line (the General Armament Department, the Department installed), the hoisting of transmission lines, transmission lines linked board, roller conveyor line, painting bake A section of line, conveyor belts, turn conveyor, climbing conveyor, conveyor chain plate, hoist; white non-toxic food industry conveyor belt through the FDA testing; electronics industry, from the PCB plug-in automatically on the board → automatic →→ wave plate → detection → product assembly, electronic automation equipment higher color TV sets, refrigerators, air conditioners, washing machines, water heaters, VCD, DVD, LCD, speakers, computers and other home appliances, electronic products整机assembly, with the Department of , The General Armament Department, aging, testing, packaging, complete sets of production lines, whole plant logistics transportation; parts material handling industries, climbing, hanging chain and improve delivery of materials between floors; motorcycles, electric bicycles, scooters linked the board assembly line ; Pieces of metal, plastic, pieces of the surface coating paint systems, liquid of paint systems, automatic painting system, water-lim painting

公司主要产品有：插件线、皮带装配线、波峰焊、热风回流焊、工装板差速链装配生产线、悬挂输送线、板链输送线、滚筒输送线、涂装烤漆线、皮带输送机、转弯输送机、爬坡输送机、链板输送机、提升机等；食品行业白色无毒输送带通过FDA检测；电子行业，从PCB插件→自动上板→全自动波峰焊→下板→检测→产品装配，电子设备自动化较高；彩电、冰箱、空调、洗衣机、热水器、VCD、DVD、LCD、音箱、电脑等各种家电、电子产品整机装配、部装、总装、老化、检测、包装成套生产线、整厂物流输送；各行业零部件物料输送、爬坡、悬挂链及楼层间物料输送提升机；摩托车、电动自行车、滑板车的板链装配线；金属件、塑料件的表面处理涂装烤漆系统、液体涂装系统、自动喷漆系统、水廉喷漆

Study on the activity of PAL、POD and SOD in the corn after inoculated pathogen showed that there were big differences between resistance and susceptible materials. The changs were more stabilization in resistance materials than in susceptible materials. There is a wave crest of activities in resistance materials, but no activity wave crest in the susceptible.

通过对抗、感品种接种病原菌后，其苯丙氨酸解氨酶、过氧化物酶和超氧化物歧化酶活性变化的研究表明，抗、感材料之间的变化大不相同，抗病材料中的各种酶活性变化都比较稳定，并且有活性波峰；而感病材料中各种酶活性变化都比较大，并且没有活性波峰。

The research results show that there is a good positive correlativity between dynamic modulus of elasticity and the longitudinal or transverse wave velocity, but there is no such positive correlativity between dynamic Poisson's ratio of the rocks and its longitudinal or transverse wave velocity.

研究结果表明，煤系岩石的动弹性模量与岩石的纵波或横波速度具有很好的正相关关系，而与泊松比不具有这种正相关关系。

At the chapters of theory analysis,constitutive equation of dusty is deduced from the results of the experiment and related theories about oblique shock wave.after that relationship of parameters reflecting flow-field characteristic are deduced from theories of shock wave polar .The paper set up conservation equations depicting gas and solid flow-field by double fluid model,thus equations and constitutive equation of granular phase form closed equations.then the paper uses AUSNT vector splitting method to numerically calculate the equations.

理论部分主要包括：利用实验测试结果以及斜激波理论测试出该堆积粉尘的本构方程，然后利用和激波极曲线理论得到反映流场特征参数的变化曲线；本文还利用双流体模型，建立了描述气—固两相流动的守恒型方程组，与本构方程一起构成封闭方程组。

The main work and contributions accomplished in this dissertation are as follows:(1) The fundamental theory of electromagnetic wave polarimetry in radar, including the polarization representation of EM wave, the scattering coordinate system in polarimetric SAR imaging and the polarimetric scattering description, is presented.

本文的主要工作和贡献如下：(1)介绍了雷达极化的基本理论，包括极化表示以及极化SAR成像中的散射坐标系和极化散射描述。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。