When somebody designed that database, they didn't have tables like this, so they moved from a model of abstract things they wanted to represent into some physical database structure.
最初设计数据库时，并不存在这样的表，因此这些表需要从抽象的模型中得出，表现为某些实际的数据库结构。
Its interior structure and vapor condensation characteristic are introduced, and the physical model is constructed. The vapor condensation process around water condenser is calculated in theory.
介绍了捕水器的内部结构和捕水特性，建立了物理模型，对水蒸气在捕水器管路凝结问题进行了理论计算。
According to the special structure of the differential velocity bed, a simulation calculation of the coal combustion and the physical and chemical process was carried out by the cell model.
针对差速循环流化床的结构及特有形式，采用小室模型的方法，对炉内煤的燃烧及其物理、化学反应过程进行了相应的仿真计算。
In view of the fact that this article analyzed the fuel cell interior heat management with emphasis, to union the fuel cell physical structure establishes its simulation model.
鉴于此，本文重点分析了燃料电池内部热管理机理，结合燃料电池的物理结构建立其仿真模型。
In this paper, a physical model of the structure and attenuation of shock waves in metals is presented.
本文给出了研究金属中激波构造与衰减的一个物理模型。
The paper gives a partial demonstration and complete analysis to deduce the printer model on the basis of physical structure of printers and printing arts.
从印机物理结构以及印刷工艺出发，给出了部分推导无主轴凹版印刷机模型步骤以及完整思路。
The H-E model provides the thermal parameter and the structure forming parameter of cement initial hydration, which combines the chemical reaction course and physical state of the structure forming.
模型提供水泥初始水化历程的热学参数及结构形成参数，将化学反应进程与结构形成的物理状态结合起来。
In this paper, physical model is designed and thermal simulation experimental system built for new type cooling and lining structure of BF.
针对高炉新型炉体冷却结构，设计了物理模型并建立了热态模拟实验系统。
In this article, the physical model of the HD reading system was built according to its structure, the reasons of why nonlinear factors exist were also explained.
该文根据磁盘读取系统的结构，建立了它的物理模型，并指出其存在非线性因素的原因。
A sub circuit model for VDMOS is built according to its physical structure. Parameters and formulas describing the device are also derived from this model.
从VDMOS的物理结构出发建立子电路模型，进而导出描述其交直流特性的参数及模型公式。
Research contents of database design include database structure characteristics design, database behavior characteristics design and database physical model design.
研究数据库的设计内容，主要包括数据库的结构特性设计、数据库的行为特性设计、数据库的物理模式设计。
Based on the data of physical education teaching model, this paper focused on concept, structure and function of the model.
在对体育教学模式进行文献资料整理与归类的基础上，重点分析了体育教学模式的概念、结构及功能。
A new approach of full-mode flutter analysis with double parameters is proposed, which is realized in ANSYS, based on the full-order discretized physical model of structure.
基于结构的有限元全物理模型，提出了一种双参数全模态颤振分析方法，并在ANSYS中实现。
Different smart IC card has different characters of physical storage structure and data storage structure, IC card data storage model could present IC card internal storage structure.
不同型号的智能IC卡的存储器有其不同的物理存储器构造和不同的数据存储结构的特点，IC卡数据存储模型可以很好的描述IC卡内部存储结构。
The two components have identical vertical structure and physical process. The global spectral model component uses spherical harmonics as horizontal basis functions.
这两部分采用相同的垂直结构和物理过程，都用球谐函数作为水平基本函数。
According to the analysis of the physical structure of wheeled mobile robot, motion model can be constructed.
通过对轮式移动机器人的物理结构进行分析，得到移动机器人的运动模型。
To evaluate the stability of the proposed method, the statistical properties of the physical parameters of the bridge structure were analyzed under the model parameters with random errors.
为了评定此桥梁损伤识别方法的稳定性，在模态参数带有一定的随机误差的情况下，分析了这种桥梁损伤识别方法的结构物理参数的统计特性。
The Physical model is analoqous to the real structure used in the hydraulic power plants.
水电阻按照水电厂中实际使用的结构来计算。
As illustrated in FIG. 1, at step 102, a finite element model (FEM) representing the physical structure of a heart is generated.
如图1中所示，在步骤102中，产生表示心脏的物理结构的有限元模型(FEM)。
The model can reduce redundant managements and simplify structure of grid system through uniting physical grid nodes.
该模型通过物理网格节点的联合，来消除管理上的冗余，简化网格系统结构。
In some respects, such as relations between deposit and tectonic setting, mineralization physical chemical condition and structure, and genetic model and so on, many questions are waiting.
但在矿床与构造环境、构造与成矿物理化学条件及成因模型等方面还有待于深入研究。
This paper proposes a new direct flutter analysis of long span Bridges, based on the full order discretized physical model of structure.
基于结构的有限元全物理模型，提出了用于分析大跨度桥梁耦合颤振新的直接分析方法。将系统的气动运动控制方程转化成广义特征值问题。
Then the model of random meshwork is adopted to describe approximately the material's physical structure.
可以近似用“无规网络模型”描述材料的结构。
In hydropower engineering construction, the research to the characteristics of discharging structure mainly depend on physical model experiment and numerical analysis method.
在水电工程建设中，对泄水工程水力特性的研究主要是借助物理模型试验和数值分析方法。
The randomness of both physical parameters of structure and the amplitude peak of applied load are taken into account in the present model.
利用振型迭加法导出了结构物理参数和作用荷载幅值同时具有随机性时结构动力响应随机变量的数字特征计算表达式，并提出了求解方法。
The utility model aims to provide a traditional Chinese medicine physical therapy pulse device which has simple structure and convenient use.
本实用新型的目的在于提供一种结构简单、使用方便的中药理疗脉冲装置。
The physical model of solution space on the structure of six-axis accelerometer with nondimensional parameters was established and changed into 2D plane by the conversion formulas.
用空间模型理论建立了六维加速度传感器弹性元件无量纲尺寸的空间模型，并转换到二维平面，给出了转换公式。
The physical model of solution space on the structure of six-axis accelerometer with nondimensional parameters was established and changed into 2D plane by the conversion formulas.
用空间模型理论建立了六维加速度传感器弹性元件无量纲尺寸的空间模型，并转换到二维平面，给出了转换公式。
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