有限模型

Therefore the emphasis of this task is to study auto-regressive model of non-stationary time series with finite length.

所以，有限长度非平稳时一间序列的自回归模型，是本课题理论研究的重点。

In order to optimize the structure for the firer base plate by means of FEM,A three- dimensional shell model has been set up for a particular type of firer base plate.

为了优化发射器座钣的结构设计，采用有限单元法对某型号发射器座钣三维空间板壳结构进行了整体三维建模，同时运用弹性力学有限元法对座钣建立的有限元模型进行模态分析和瞬态动力学分析。

The main work of this thesis is simulation study on the basis of large sample properties for two estimates by Monte Carlo method with some models. We consider the problem of the choice of window width, consistent rate and some doubtful points about consistent rate with fixed sample size.

本文的主要工作是依据大样本性质，对特定模型的这两种估计用Monte Carlo方法进行了模拟试验，讨论了长度有限的样本情况下窗宽的选择问题，比较了两种估计的拟合程度，相合速度并提出了对相合速度的一些疑难点。

Computational results show that the interaction of turbulence and combustion in scramjet can't be ignored. Applying flamelet model to simulate turbulent combustion in scramjet is a good choice.

说明超燃冲压发动机内流场的湍流和燃烧相互作用比较强，火焰面模型比有限速率反应在模拟超燃冲压发动机内的燃烧流场更有优势。

On the basis of this, the finite difference forward simulation program of crosswell seismic wave equation was compiled.

在此基础上，编制了跨孔波场交错网格有限差分正演程序，并应用该程序对半空间粘弹性跨孔模型进行了正演计算，得到了震源在不同位置时的波场快照及地震记录图。

The results showed that the mobility of free carriers is the key inluencing factor on the electrical conductivity of intrinsic nc-Si: H films but the effect of free carrier concentration is finite, while the free carrier concentration and mobility are both the main influencing factors on the electrical conductivity of phosphorus-doped nc-Si: H films. Its transportability can be reasonably explained by a HQD model.

研究结果表明影响本征纳米硅电导率的主导因素是载流子的迁移率，而自由载流子浓度影响有限；影响掺磷纳米硅薄膜电导率的因素既包括磷掺杂产生的自由载流子，又包括迁移率，其输运过程可用量子点隧穿模型合理解释。

The discrete heat and moisture transfer equation and control conditions are obtained with finite volume method. The temperature and moisture distribution and transient heat and moisture absorbing and desorbing of porous envelop are calculated with numerical method. The program for porous envelop heat and moisture transfer are developed by use of FORTRAN. The heat and moisture transfer model is verified using the examples given out in the reference [41] and testing data of funk hole located in A zone Chongqing university.

采用有限体积法对多孔材料热湿传递方程及控制条件进行离散，用数值方法求解多孔围护结构温湿度分布和壁面的瞬时热湿吸放量，采用FORTRAN语言编写了围护结构热湿传递计算程序，并用文献[41]给出的算例和重庆大学A区防空洞的测试数据对模型进行了验证。

This thesis is composed of following parts: the fundamental theory of the modern cryptology is briefly researched, in which the mathematic model of cryptology, data encrypt principle and Galois field theory related with elliptic curve crypto is discussed.

研究了现代密码学相关的基本理论，介绍了密码系统的数学模型、数据加密原理和与椭圆曲线加密密切相关的有限域理论； 2。

Starting from the configuration of the optical prime code, a kind of key signature code for the optical code-division multiple access system, based on the linear congruence theory in the finite Galois field, the correlation properties of the basic prime code, the extended prime code and the modified prime code are mathematically analyzed, the distribution of cross-correlation values is given and the overlap area of "1"s in the case of periodically circularly shifting is indicated.

摘 要：围绕OCDMA系统的重要地址码类型--光素数地址码的结构模型，根据有限Galois域上的线性全等理论，系统分析了基本素数码、扩展素数码、修正素数码的互相关特性，指出码字中"1"位的重叠区域。

Calibration of discretionary lane changing model based on close-range photogrammetry;2. In order to solve the problem that Gipps lane changing framework calculation is inefficient in lane changing model,a vehicle moving framework based on finite state automaton was proposed.

为了解决车道变换模型中采用Gipps换道框架计算效率不高的问题，提出了一种车辆行驶的有限状态自动机框架，该框架能够容纳选择性换道和强制性换道，使驾驶员从当前状态出发进行局部决策。

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。