模型理论

Enerally, the prediction models can be either empirical also called statist

一般说来，预测模型可以是经验模型，也可以是理论模型

The linear stability and the structural properties of the solutions in the relaxation limit have been discussed.

我们对SG模型做了相关的理论分析，探讨了此模型的线性稳定性以及松弛极限下模型解的结构特性。

In the part of the vibration experiments and analysis, firstly, used the simple-beam theory to estimate the natural frequency of the beam of the 20-headed computerized embroidery machine.secondly, measured the beam of its low rank natural frequency, the beams horizontal vibrating acceleration amplitude, speed amplitude and the displacement amplitude in different rev and different turn parts. Found that it is sympathetic vibration, which bring on the thread-broken rate rise rapidly. On this base, established the finite element analysis modle of the vibrating beam, and took on hamonic analysis and modal analysis with the mold. The rusult of test and analysis offer the basis for farther improvement of the computerized embroidery machine.

振动分析部分，首先由简单梁理论出发，对横梁的固有频率进行估算；接着通过测振仪器对20头电脑刺绣机横梁进行了试验模态分析和不同工况振动测试；获得了横梁前四阶固有频率和模态振型，以及在不同工作转速、不同回转部件下横梁振动的加速度幅值、速度幅值和位移幅值；找到了横梁振动加剧的原因——共振；在此基础上建立了符合实际情况的横梁有限元模型，对模型进行了模态和谐响应计算，证实了模型的可靠性，为下一步的改进设计提供了依据。

Different from traditional system protection models, such as access control matrix model, this theory describes the operations in system by functions of random variable vectors, build an analysis model of trusted system with three axioms, and analyze the information flow in the system by tracing the operation sequence of the system.

与访问控制矩阵模型等传统的保护系统模型不同，这一理论用随机变量向量的函数来描述系统操作，基于三条公设建立了可信系统的分析模型，并通过对系统操作序列的跟踪来分析系统中的信息流。

This paper develops a new theoretical model based on the mathematical model of the tangential velocity .

本文以旋风分离器切向速度模型为基础，给出了各部分压力损失的计算方法，并针对不同的旋风分离器模型，将其计算结果与实验结果及其他的压力损失理论模型进行了比较，结果表明该计算方法可行。

Based on the applications of the economics theory, the improvements of estimation methods, and the coverage of data, the models for forest product markets become better and better.

近几十年来，由于经济理论在林产品市场模型中的应用，模型估计方法的改进，以及详细数据的获得，林产品市场模型越来越完善。

Based on the thermionic emission theory, a method to extract parameters of Si SBD is given in this study. Using this model, we tested the characteristics of devices and extracted the parameters of two kinds of samples. The ideality factor is 1.01 and 2.13 respectively. The zero-field barrier height is 0.70eV and 0.72eV. The surface state density is 5.5×10~(15)cm~(-2)eV~(-1) and 4.3×10~(12)cm~(-2)eV~(-1). The interface oxide capacitance is 9.0×10~(-4)F·cm~(-2) and 5.4×10~(-6)F·cm~(-2). The neutral level of the surface states is 0.81eV and 1.1eV. The reverse breakdown voltage is 101V and 56V.

本研究在热电子发射模型的基础上，建立一种提取Si基SBD器件特性参数的理论模型，基于这个模型，对两种样品的性能进行测试，并计算出退火和未退火样品的理想因子分别为1.01和2.13、零电场势垒高度分别为0.70eV和0.72eV、表面态浓度分别为5.5×10~(15)cm~(-2)eV~(-1)和4.3×10~(12)cm~(-2)eV~(-1)、界面层电容分别为9.0×10~(-4)F·cm~(-2)和5.4×10~(-6)F·cm~(-2)、表面态中性能级为0.81eV和1.1eV、反向击穿电压101V和56V。

Ds Explained the technology of tolerance design;Aimed at Antenna Structure based on modularized assembly, by referring to the random numbers based on Uncertainty Theory that accord with tolerance distribution rule and using Monte Carlo simulation, a simulated analysis and mathematical statistics of the Antenna-Structured Precision Information Model terminal error have been done.

对产品精度信息模型的公差分析和公差综合技术进行说明；针对模块化装配的天线结构产品精度信息模型，基于不确定性理论的随机公差分布，利用蒙特卡洛模拟法来对天线结构的装配产品精度信息模型的终端误差进行仿真分析和综合。

The main contributions of the dissertation are concluded as follows: 1 A mathematical basis of the exchange of product data----the Set-based model mapping is established. The shape model mapping, such as the 1: 1, 1: n and n: n topological and geometrical mapping, is especially analyzed.

总结下来，论文做出了以下几个方面贡献：(1)建立了产品数据交换的数学理论基础——基于集合的模型映射，重点研究了在产品数据模型映射中具有代表性的形状模型映射，给出了一到一、一到多和多到多的拓扑几何映射分类。

The theoretical study shows that the continuous variability of non-operator, and operation, and or operation can be realized in mathematics, and can use a variety of forms such as mathematical index, polynomial and trigonometric. This paper introduces several and/or operations models, and the comparison by the simulation experiment shows that the model I is a more ideal model.

理论研究表明泛逻辑中泛非、泛与／或运算的连续可控性在数学上是完全可以实现的，并可以用多种数学形式如指数、多项式和三角函数等形式来实现，本文介绍的泛与／或运算的几个模型，通过仿真实验比较可以得出模型一就是一个比较理想的模型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。