二维的

If the value of two-dimension random variable is finite or countable, then is called two-dimension discrete random variable.

Definition 3.3 如果二维随机变量可能取的值只有有限个或可列个，则称为二维离散型随机变量。

Through customizing 3D template and 2D drawing template, Improving the efficiency of using Pro/Engineer modeling greatly, bringing the result that gets twice the result with half the effort to the establishment of the 2D drawing and BOM too.

通过三维模板及二维工程图的定制，大大提高了使用Pro/Engineer建模的效率，也给二维工程图及BOM的创建带来事半功倍的效果。

The main purpose of this study is to find the solution of the two- dimension irrotational flow and supercritical flow in channel contractions. For irrotational flow, the potential function is used to compute the water depth and velocity distributions in constriction channel.

本文的主要目的为分析二维渠道中非旋流及超临界流之流况，针对二维束缩段非旋流时，利用等势能函数来计算矩形渠道收缩段之水深及流速分布。

The nonlinear equations are dealt by the quasi linear iteration equation,at last,by the orthogonal discrete method,the solutions of the initial problem are obtained.

本文建立的载流板壳二维磁弹性问题的数值计算方法——差分正交离散法不仅对二维问题有效，同样也为三维磁弹性的边值问题的解决奠定了理论基础。

In order to forecast the storm surge inundation , a two-dimensional forecast model of storm surge inundation is established.

本文建立了一个二维风暴潮漫滩数值预报模式，用交序法对二维全流方程组进行了求解，并采用干湿网格法对岸边界进行处理，实现了岸界的移动。

This is a two-dimensional vector graphics of the source of two-dimensional graphics become very helpful.

详细说明：这是一个对二维图形矢量化的源码，对二维图形变成很有帮助。

The decode principle and design of two-dimensional VERNIER position sensitive anode are introduced in detail.

报道了二维游标位敏阳极光子计数成像探测器，详细介绍了二维游标位敏阳极的解码原理和设计结果。

With the development of technology, the one dimension barcode can no longer meet the social needs because of its limitary information capacity and dependence on data-base, so the various 2-D barcodes come into use and generalization among which the PDF417 barcode is most widely used.

随着科技的发展，一维条码由于受到信息容量的限制和使用时对数据库的依赖，在很多场合已不能满足需要，于是二维条码得到推广和使用。在众多二维条码中，PDF417条码的应用最为广泛。

Paired t-test was used to compare the intensity value.Results:After having injected FX530,enhancement of liver on grey scale imaging was divided into four continuous phases-arterial,phase,portal veinous phase,capillary phase and delayed vascular phase,three phases in kidney—arterial,capillary and delayed vascular phases,but no parenchyma enhancement appeared in testis.Parenchyma enhancement in liver showed"detained enhancement",while in kidney it showed "wash-in and wash-out".

结果：造影后，肝脏二维灰阶增强分为四个连续的时相即动脉相、门静脉相、毛细血管相和延迟血管相，实质增强有&滞留增强&现象；肾脏二维灰阶增强分为动脉相、毛细血管相和延迟血管相，肾实质增强表现为一过性；睾丸仅表现为血管增强，睾丸实质无增强。

Based on the estimation of the directions of arrival and the Doppler frequencies of the sources, a quaternion model was proposed, which made the estimation of the DOA and the Doppler frequencies similar to that of one-dimensional azimuths so as to avoid direct and indirect pairing with the complex model.

针对阵列信号处理中方向角、多普勒频率的同时估计问题，提出了方向角、多普勒频率的四元数模型，使估计方向角、多普勒频率二维问题与估计一维问题相类似，从而避免了在经典的二维复数模型估计中直接或间接的配对。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。