有限模型

Following work has been done In the first part, we use the two dimensional or 2＇-state Markov modulated deterministic process to approximate the actual arrival process and then model the ATM multiplexer as an two dimensional MMDP/D/1/K or 2＇-state MMDP/D/1/K queueing system respectively.

概括如下：首先在连续时间模型下，利用二元MMDP和2＇-状态的MMDP近似实际到达过程，然后对具有有限存储器的ATM多路复用器建模。

This model is a group of partial differential equations. Th solution is obtained with finite difference method to give a differential equation of gas pressure, temperature and rate and its calculation step.

该模型是一组偏微分方程，采用有限差分法对其进行求解，给出了计算气体压力、温度、速度的差分方程和详细的计算步骤。

The finite difference method is used in simulation and comparison.

采用该模型和有限差分方法，对系统性能进行仿真，并与实验数据进行比较。

The model is solved by means of finite difference method.

应用有限差分数值算法对该模型进行了求解。

A new prestack depth migration method that is based on wave field continuation has been developed by combining physical model of plane wave synthesizing with Fourier finite difference operator for wave field continuation.

本文将平面波合成的物理模型与傅里叶有限差分波场延拓算子相结合，提出了一种新的基于波场延拓的叠前深度偏移方法。

This paper proposes a two-player, finite-horizon differential game model to analyzejoint implementation in environmental projects, one of the flexible mechanisms considered in the Kyoto Protocol.

提出了一个两人有限微分对策模型用以分析在环境工程项目中的联合行动，其灵活机制之一已在京都议定书中得到了考虑。

In this paper, the temperature field in the well has been predicted by applying the finite differential method.

本文应用有限差分的控制容积法对井筒温度进行了模拟预测，建立了合理的物理和数学模型。

In HgCdTe with low dislocation density, the main component is a Guassian like distribution and can be described by the Fick's law with a constant diffusion coefficient with a limited source as the boundary condition.

在缺陷密度比较低的碲镉汞材料中，砷扩散的主体符合恒定扩散系数的有限源扩散模型，呈现出浓度随深度的高斯分布。

The time-dependent Dirichlet boundary condition was used to describe the variation of water head during water level fluctuation.

模型的求解采用效率较高的积分有限差分法进行空间离散，并编制了全隐式联立求解的计算程序，通过变换主要变量，实现了饱和与非饱和的相互转变，采用随时间变化的Dirichlet边界条件精确模拟水位波动时的变水头边界条件。

During the calculation the results got by quintic spline kernel was the best so it was chosen as the proper kernel for the SPH simulation. By comparison of the simulation results got by SPH and finite volume method, it was proved that the buffer cells method proposed in the SPH simulation to implement the Dirichlet boundary conditions was accurate, and this is of great importance for the simulation of flows pass a pipe. At last, the SPH method was improved to simulate the liquid-solid two phase flows and the results show that this method was appropriate for the simulation of flows containing viscous fluid and macroscopic solid components. Now the two methods are both able to predict the continuum flows and rarefied flows severally, but the hybrid program still has some aspects to be improved.

首先用标准算例验证了SPH方法的理论模型和计算程序的准确性；通过比较确定选用五次样条核作为计算低雷诺数下的粘性连续流动时的核函数；采用SPH方法和有限体积法分别对同一管道流动进行了对比计算，证明了本文提出的边界缓冲区方法在实现SPH方法中的流体边界条件时的有效性，解决了SPH方法模拟管道流动时的一个关键问题；巧妙地使用SPH方法对化工分离流动中常见的固液两相流及固液耦合作用进行了模拟尝试，获得了较好的结果；在跨尺度计算方面，目前两个子程序已经能够分别模拟连续的和稀薄的二维管流问题，二者的耦合计算程序还处于调试和优化阶段，各个参数对于计算精度和计算速度的影响规律仍在探索中。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。