二维的

AIM: To study the compression performance of three-dimensional CT image based on region wavelet SPIHT algorithm, underlaying the previous researches on the compression coding algorithm of two-dimensional X-ray image based on SPIHT target area.

目的：在以往对二维X射线影像进行基于SPIHT的区域压缩编码算法研究的基础上，探讨基于目标区域小波SPIHT算法对三维CT图像的压缩方法。

This paper puts forward an improved Curtice model, by modify drain-source current I ds and breakout volage V p of GaAs MESFET tube on the basis of Curtice semiexpirical model, and uses fast simulated annealing algorithm to resolve it.

从模型的建立方法来看，现有GaAsMESFET非线性模型大致分为 3种类型：(1)最值模型[1] 这种模型从求解GaAsMESFET的二维或三维电磁场方程出发，用数值计算算出MESFET的非线性特性。

The formula for unitizing is derived theoretically , which can be used as the foundation to determine the measuring light points in skirt circuit design .

介绍了新型传感器PSD在一维空间和二维空间的检测原理，并以理论推导的方式给出了归一化公式，来作为设计外围电路检测光点位置的依据。

Numerical simulation of water injection into coal seam throughlong drill hole and determination of its reasonable parameters

用有限元数值模拟方法求解了煤层注水二维、三维非定常渗流方程，用该数值计算模型结合具体实例，主要分析了工艺参数中注水压力、时间和钻孔间距与湿润范围的动态变化关系，给出了选取合理的注水工艺参数的计算公式。

A framework of 2D high resolution geologic correlation is built for the 2nd member of Hetaoyuan Fm of delta facies and the characteristics of combination and plane distrib.

并在此基础上在核二段三角洲相地层建立了二维高分辨率地层对比格架，分析了不同的沉积时期各沉积微相的组合特征和平面分布特征。

We first proprosed the method of exposing holographic plate by dividing the area with mask. In the experiment, we fabricted the elements of 1—D and 2—D butterfly, interconnection and 1—D crossover interconnection.

本首次提出并采用分区掩膜曝光制备这两种光互连全息元件的方法，在实验上制备出光学蝶互连网络的一维和二维全息元件和交叉互连网络的一维全息元件。

In Chapter Two, we introduce the Dirac Fermion as the low energy excitations of the graphene, based on the field theory. We then discuss two-dimensional honeycomb lattice in the nearest-neighbor tight-binding model.

在第二章里，我们研究最近邻紧束缚模型下的二维蜂窝结构的电子态，然后讨论对应的场论模型，即一维Dirac Fermions 模型，最后引出有效质量方程。

Tidal mixing plays a key role in the simulation of the thermal structure of the ocean, and how to calculate the value of the vertical kinematic viscosity coefficient in ocean models is very important.

海流数值模拟从二维过渡到三维，垂直涡动粘性系数的确定成为一个研究热点，潮混合在海洋热结构的数值模拟上起着非常重要的作用。

Firstly,BEM can be used to accurately calculate the expanding stress at the tip of reamers,with regarding the soil medium as the elastomer.

采用轴对称数值方法，将三维模型转化为二维模型，再采用弹性体边界元边界方法，精确计算扩孔器端面的扩张应力，在此基础上求得扩孔器工作过程中所受的阻力和阻力矩，并通过遗传算法，以阻力和阻力矩最小为优化目标函数，对扩孔器的形状、尺寸进行优化。

Then the absorbed pump power density, 2D distributions of temperature and index of refraction are also analyzed and discussed.

数值计算的结果表明二维效应的温度分布和应力分布要比一维效应给出的分布更均匀。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。