二维分布

Based on two-dimensional elastic wave equation and adopts the well logs as constraint condition, a new imaging method of crosswell seismic data-elastic wave equation inversion and imaging with the well logs constraint is given by using adjoint theory of distribution-parameter control system.

基于二维弹性波动方程，利用分布参数控制系统的伴随理论，采用测井资料作为约束条件，本文给出了一种井间地震资料速度成像的新方法——井间测井约束弹性波动方程反演成像。

The computation of two-dimensional advection transport using current methods such as Alternating Direction Implicit Method and linear interpolation technique can be subject to numerical attenuation,parasite oscillation and poor reproduction of wave propagation when large time steps are used.

在概化的平面区域内，采用上述方法模拟了二维初始浓度高斯分布和水流激波在旋转速度场及均匀速度场上的对流输移问题，结果表明方法在优化幅值衰减和数值扰动以及计算效率方面具有相当的发展潜力和应用前景

Structural reliability/narrow bounds ; bivariate normal integral

结构可靠度／二阶界限法；二维正态分布函数

In chapter 3,we dig out two families of invariant quartic curves of a quadratic system.

第五章讨论向量场具有对称中心的二次系统，利用系统的不变双曲线及不变四次曲线，我们确定了一个对应极限环（1.1）分布的二维参数区域，其边界的构成为如下几种常见的极限环分枝：霍夫分析，庞加莱分枝，同宿分枝和异宿分枝。

Ten optic disc stereometric parameters including"tw o-dimensional","three-dimensional"and "RNFL-related"parameters were acqu ired to assess the intraobserver and interobserver reproduci...

结果：观察者内和观察者间各视盘参数的ICC值均较高，分别为，正常人组0.811～0.998和0.724～0.963，青光眼组0.803～0.996和0.637～0.897，其中观察者间各视盘参数测量的ICC值在正常人组和青光眼组差异有显著性(P=0.000)，ICC值在&二维&视盘参数、&三维&视盘参数及&与视网膜神经纤维层相关的&视盘参数呈递减分布。

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。

In the early life evolution, the evolution of ecosystem mainly exhibited the development what was from passive accepters to active competitors in life demands for environment factors, from dependence on to reform in the environment, from two-dimension to three-dimension in the spatial distribution, and from outside to inside of organism in the style of energy transformation.

在生命演化的早期，生态系统的演化主要表现为生物从被动地接受环境因子到对环境因子需求的竞争，从依赖环境到参与对环境的改造，生物的环境空间分布从二维到三维，生物的能量传递方式从生物体外到体内。

Then the spatial localization of the main well-known visual neuron's receptive field models such as DOG function, LOG function, higher order derivatives of Gaussian functions and 1—D, 2—D Gabot function models is quantitatively analysed.

如对通常被作为建立模型的主要根据的&最优的空间定域性&判据的物理意义和适用性也没有得到深入的论证，而且已有的主要几类感受野模型，如DOG函数、LOG函数、高斯函数的高阶导数和一维、二维Gabor函数等模型在空间分布形态上难以准确反映系统中神经元感受野的形态和信息处理机制等等。

The relations between the potential difference and the discharging time when the discharge current is a step function as well as a step function containing high frequency vibrations, the relations between one-dimensional and two-dimensional spark locations and potential difference based on the thin wall model and the thick wall model have been studied.

仿真研究了放电电流为阶跃函数以及含高频振荡时电位差与放电时间的关系；基于薄壁模型和厚壁模型，仿真研究了电极下表面一维放电点位置和二维放电点位置与电位差的关系；对于确定的电位差，仿真研究了放电点位置的分布情况，说明两点输入不能唯一地检测出放电点位置，从而引入四点输入检测的思想。

5 Dimensional gravity forward modeling is fulfilled in accordance with this gridded model.

重力正演利用了该网格的二度半体模型，并进一步改进了地震走时的二维射线追踪计算方法，以适用于速度随机分布的网格介质。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！