查询词典 atom model

A Foundation Model - the Graded Component Object Model of Product Family is offered on the analysis of knowledge characteristics of PFM. Then, the component object, the Conjunctional Hiberarchy Model of Product and the relationships among component objects are defined respectively. Whereafter, the rapid generating mechanism of the instances of component objects and product is introduced. Based on the theory of GCOM, an Enhanced Model - the Skeleton Model of Product Family is offered.

通过分析产品族模型蕴含知识特性，提出了一种具体的产品族基础模型表达——产品族元件分级对象模型，分别定义了各级元件对象、层次联接结构模型和元件对象关系，并探讨了产品族元件分级对象实例的生成与产品实例快速获取的机制。

After 1-D approximating of electrostatic fields in the IDT, we give the basic analysis model of IDT: the Delta function model, impulse response model, equivalent circuit model, and the model parameters.

从激励产生SAW的IDT上静电场的一阶近似入手，给出了分析IDT的基本模型：δ函数模型、脉冲响应模型、等效电路模型，给出了各模型的基本特点与参数。

Firstly, we briefly introduce the assembly model, analyze and evaluate the typical assembly model. Secondly, we propose a new-layered assembly model which is based on discrete face. At last, we briefly discuss how to use the DENEB system to abstract the information from the CAD model and how to add constrain information to the DENEB model.

首先，对装配模型进行了简要介绍，并对当前典型的装配模型及其特点进行了介绍和分析；其次，结合本文提出的装配规划算法提出了基于离散面片的层次化装配模型；最后，简要介绍了如何通过DENEB系统对CAD模型中的信息进行抽取以及如何添加约束信息。

Methods Introduce some common used experimental animal models in the medical psychological studies,include anxious animal model,depression animal model,post trauma stress disordermodel ,morphine dependent model of rat,sleep deprival animal model and society stress animal model.

主要包括有焦虑动物模型、抑郁动物模型、创伤后应激障碍模型、大鼠吗啡成瘾及戒断模型、睡眠剥夺动物模型及社会应激动物模型等。结果了解医学心理学研究中的动物模型制作和使用方法。

Consequently the diathermancy was strengthened, the effect of heat transfer was improved and the flow and combustion process in the boiler has become much better. First, in this thesis the burn characteristic of the rubbish and the process of combustion in the chain boiler has been studied. A series of mathematic model has been given. This thesis carefully introduced the principle and formula of the turbulent flow model、two-equation model、radiation model、dispersed phase model and standard wall function method. The software FLUENT has been applied to simulate the temperature、pressure、velocity and mass fraction of species in the boiler furnace and stokehole. The analysis and the comparison have been done. The calculation results indicate agreement with the fact and the studies both here and abroad.

首先，本文针对SZL10-1.25-MJ造纸垃圾焚烧锅炉，结合其燃料的特性，对垃圾的燃烧特性以及层燃炉中垃圾的焚烧过程进行分析；给出一套完整的垃圾锅炉炉内传热数学模型，并分别详细阐述了湍流流动模型、双方程模型、辐射传热模型、离散相模型及标准壁面函数的原理及计算公式；借助于Fluent软件平台对炉膛内的温度场、速度场、组分浓度场及炉膛出口的温度分布、速度分布、组分浓度分布等进行数值模拟，分别从定性和定量的角度与实际情况进行了比较，得到了较满意的结果；模拟结果与国内外的很多研究能较好符合。

In the section of physical models, the paper presents a three-dimensional model called nine-equational model that treats the object as two phases and two components. The nine-equational model includesκ－εturbulence model and diffusibility model owing to the gradient of mass concentration.

在物理模型部分，本文对钢安全壳内部大空间提出了三维、两相、两组份、对气相引入κ－ε湍流计算模型和考虑由于气体浓度差引起的扩散效应的九方程模型。

Taking a heavy truck cab as the example, a model of the spotweld space based on finite element was built to analyse the torsional stiffness of the model, and the amount and layout of the spotweld using the discrete variable topology optimization were optimized. Comparing with the original model in welding spot's number and the torsional stiffness, the optimized model has less number of welding spot, but the torsional stiffness of the two model is almost the same.

以某重型卡车驾驶室为例，在有限元模型基础上建立焊点空间模型进行扭转刚度分析，并采用离散变量拓扑优化方法对焊点的数量及空间布局进行优化，通过优化前后的对比可知，优化后在不降低扭转刚度的同时减少了焊点数目。

With the analysis of the framework of MDA and categorization research on all kinds of model transformation methods and languages in existence, analyzing the applications of OCL in MDA considering the characteristic of OCL, three directions is emphatically studied in this paper:First of all, according to the declarative characteristic of OCL, this paper proposes a hybrid model transformation language named Hybrid-OCL by extending OCL from three aspects, the syntax and semantics is also defined. Hybrid-OCL can describe dynamic semantics, store model transformation information in order to support model transformation synchronization, and provides the integrated model transformation program framework.

本文以MDA整体框架为起点，分类研究了现阶段各种模型转换方法和模型转换语言，结合OCL的特性分析了其在MDA框架中的应用，并在此基础上重点研究了以下三方面内容：首先，根据OCL声明式语言的特点，选取三个角度对其进行扩展，从而设计产生了混合式模型转换语言Hybrid-OCL，详细定义了其语法和语义，并通过具体转换实例验证了这种扩展的可行性。

On the basis of 414 soil profiles from 14 provinces, it was found that soil organic carbon, differing from soil inorganic carbon and other elements, has a trend of exponentially decreasing with depth. Integral analysis of exponential curve contrasting with the linear model affords the uncertainties of linear model and exponential model for carbon storage calculation. It was found that the integration of TOC with the linear model has errors between +20% to +100%, much higher than that of the exponential model (-10% to +20%).

在收集分析14个省市414条的土壤剖面数据的基础上，发现土壤有机碳的垂直分布与无机碳和其他元素不同，存在指数分布规律，运用面积积分运算方法发现利用直线模型计算土壤有机碳库的误差(+20％~+100％)远大于指数模型的误差(-10％~+20％)。

In the model randomness, model with constantly complex modules, Kelvin-Voigt model, fractional derivative model with three parameters and standard rheologic model with three parameters are considered.

在 模型的随机性分析中分别考察了常复数模型、Kelvin-Voigt模型、三参数分数导数模型和三参数标准流变学模型。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。