模型理论

Not only for obtaining practical application but also to providing theoretical basis of ore drawing, a combined conceptive model of column drawing and MMVD has been resulted which is applied for the ore drawing simulation of high level block caving production management.

为了便于实际应用，又具有理论依据，提出了柱状体与改进的空位扩散模型的组合概念模型，该模型可应用于高阶段矿块崩落法放矿生产管理的放矿仿真中。

Using SAP5 and model experimental analysist method, the static and dynamic properties of the close-combine frame of the Edger have been predicated.

该方法包括：运用键图理论和方法，建立系统数学模型将数学模型转化为仿真模型，并进行计算机仿真对仿真计算的数据进行时域和频域两方面的分析根据设计需要，决定是否对系统进行优化设计用此方法预测了立辊轧机主传动系统的动态响应特性。

In theoretical investigations, elastic strain energy method, fiber inclination model, three cells model ...

在理论研究方面，介绍了弹性应变能法、纤维倾斜模型、三细胞模型和有限元模型等工作。

The earliest proposed line element error band theory is "ε-band" model,then "E-band" model was proposed and developed to "G-band" model.

最早提出的线元误差带理论为"ε-带"模型，后来又提出了"E-带"模型和在其基础上发展的"G-带"模型。

Integrated with the calculation methods of soil pressure, the mechanism of soil pressure of fale is studied systematically and detailedly based on the mode of axial stress distribution of wholly grouted anchor.

在全长粘结式锚杆拉力分布模型基础之上，结合本文的土钉土压力计算方法，本文对面层土压力机理进行了系统详细的研究，提出了面层局部土压力、面层土压力及土钉最大拉力的计算公式和分布模型，理论分析和实例分析表明，本文提出的轴力分布模型和面层土压力机理是合理的，解决了面层土压力取值标准问题，为面层设计提供了定量的依掘，土钉最大拉力可直接用于土钉长度设计。

Using numerical simulation technology and method of orthogonal experiment design and single factor rotating optimization, this thesis makes a study of "lost core injection ", thus achieve the optimization of the parameters of molding process, to offer basic reference when developing production technology and mould of the plastics intake manifold. Based on the study of the status in quo and development trend of weight reduction on automobile, the application of plastics to automobile and intake manifold, then under the guidance of theory model and numerical simulation technology in the process of high polymer material, this thesis launches flowing main research work: First of all, on the basis of the three-dimensional model of the part and finite element net model, several designs of gating and running system are numerically simulated and analyzed via MPA of Moldflow.

本文在对当今汽车轻量化、零部件塑料化以及的汽车进气歧管塑料化的发展现状和发展趋势进行了研究和简要介绍，然后在高分子材料成型过程中的理论模型和数值计算方法的指导下，展开主要的研究工作：首先，在零件三维模型和有限元网格模型的基础上，使用Moldflow 的MPA模块对塑料进气歧管的多个浇注系统设计方案进行数值模拟，通过分析各个方案的充填质量、熔接线位置及数量等指标，得到了综合质量较高的4 个进料口的浇口位置及半限制型浇口大小的浇注系统。

As the application of the intermediate models is concerned, the works applying the intermediate models to investigate the topographic boundary layer, frontogenesis and low-level frontal structures, and the boundary layer jet are summarized in this article. It is mainly focused on the dynamic characteristics of the Ekman layer and its effect on the low-level structure and circulation of the weather systems illustrated by the models. It is shown that the intermediate boundary-layer models have great potential in illustrating the low level structures of the weather and climate systems as they are coupled with the free atmospheric models.

对于这些Ekman边界层近似理论模型的进一步应用问题，主要回顾和总结了利用上述模型探讨地形边界层结构、大气锋生过程、低层锋面结构和环流以及边界层日变化、低空急流形成等动力学问题的研究，并对这些研究所揭示的Ekman层动力学特征及其对自由大气低层运动的影响进行了分析，结果表明，这些Ekman边界层近似模型可以较好地揭示大气边界层动力学特征，在大气边界层动力学及其与自由大气相互作用的研究上具有重要价值。

On the basis of Gaskell′s calender theories,it was set up that the mathematics model of the symmetrical calender processing of Newtonian fluid and that of non－newto nian fluid which was looked on as pure v iscous power－law fluid.It also included the content of rolls deformation and com pensation complied with mechanical calcu lation.

本研 究主要根据Gaskell理论建立了牛顿流体对称过程的压延流变数学模型、非牛顿流体对称过程的压延流变数学模型；还根据机械计算方法建立了压延辊筒变形的计算及补偿方法的数学模型。

In this paper, 3ds model file format is analyzed and adopted as a primary representation of the geometric model in virtual environment. The feasibility and generality are investigated from the point of view of principle, practical application and experiment result. It is proved that, for application not very complex, it is a practical way to adopting 3ds model and relative 3-d modeling software to establ...

该文采用了 3DS模型文件作为虚拟环境中几何模型的主要存储格式，并且从理论上、实际应用方法以及试验仿真结果几个方面分析了该方法的可行性、通用性，说明了在要求不高的条件下，采用 3DS模型和相关的三维建模软件进行虚拟现实研究工作是一条现实的途径

Theories concerning drug addiction dominantly consist of Hedonics, Abnormal Learning, Motivation-sensitization and Dysfunction of Prefrontal Cortex. Models of Self-administration and Conditioned Place Preference are often applied to study drug addiction.

药物成瘾的理论假说主要包括：享乐学说、异常性学习学说、动机-敏感化学说和额叶功能异常学说；且该研究中经常采用的动物模型有自我给药模型、条件化位置偏好模型等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。