二维的

Aiming at the dentate boundary problem which is brought by the traditional Cartesian method, Part 4 introduces the diagonal Cartesian method to improve the former 2-D flow mathematic model.

第四部分针对笛卡尔坐标方法处理复杂边界存在的锯齿状问题，引进斜对角笛卡尔方法，对已有的蓄滞洪区二维水流数学模型进行了改进。

We apply a differential evolution algorithm to study parameter inversion of two-dimensional wave equation.

利用微分进化算法进行二维波动方程参数反演的研究。

Under bivariate normal models, we characterize the classification problems of differential difficulty via parameter tuning.

在二维常态模型下，我们透过参数选择来刻划不同困难度的分类问题。

Key words two-dimensional wave equation; parameter inversion; differential evolution algorithm; finite element

利用微分进化算法进行二维波动方程参数反演的研究。

In the first part work,we developed a new method for measuring the effective diffusion constant oftwo-dimensional electrons in the presence of magnetic field.

在第一部分中，我们提出一种测量强磁场下二维电子气有效扩散系数的新方法。

A new algorithm based on the method of moments is introduced for the scattering analysis of two dimensional targets.

针对二维目标电磁散射特性分析问题，提出了一种基于传统矩量法的新算法。

In our example, we will start with two dimensions: Products and Customers.

在我们的例子中，我们从二维开始：产品和客户。

A tunable Diode laser was used to probe gain spectra of a supersonic COIL.

用小型亚音速氧碘激光器做探测光源，逐点测量超音速氧碘激光器的小信号增益二维空间分布，最大增益为1.1×10〓cm〓。

For every ULA, the wide-band signals are sampled in spatial and temporal, then 2-D discrete Fourier transform is carried out. A projection operation on 2-D representation of wide-band signals is applied in the spatial-temporal frequency domain. The direction cosine relative to the ULA axes is estimated by MUSIC algorithm.

该方法采用3个共面的均匀线阵，每一均匀线阵对宽带信号空间采样，然后进行空时二维DFT变换，在空时频率域对宽带信号进行投影变换，用MUSIC算法实现宽带来波信号方向余弦的估计。

Time-Frequency parameter estimation and direction finding for nonstationary signals impinging on an antenna array over a wide frequency band (2~18GHz) is under in-vestigation, and a new method for parameter and 2-D Angle-Of-Arrival estimation of spatio-temporal undersampled LFM sources is proposed in this paper.

摘要针对宽频段(2-18GHz)内非平稳来波信号的参数估计和测向问题，提出一种时空欠采样线性调频信号参数与二维到达角联合估计方法。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。