根据物理模型所依据的物理原理和数学表达，大致将其分为两类：能量模型和拉格朗日动态模型。
According to its physics principle and math representation, the physics based models are mainly classified into two types: energy model and dynamic Lagrangian model.
模型也可以作为实现物理系统的先驱被开发，或者模型可以根据一个已存在的系统或者开发中的系统被产生作为理解系统行为的帮助手段。
The models may be developed as a precursor to implementing the physical system, or they may be derived from an existing system or a system in development as an aid to understanding its behavior.
DB - aware对象创建的SQL语句根据所访问数据库的物理数据模型而生成。
The SQL statement created by the DB-aware objects will be generated based on the physical data model for the database being accessed.
可以根据共用的uml模型生成物理jpa类，这使您能够控制解决方案工件并保持其一致性，从而加快整个开发周期。
Starting from one common UML model down to the physical JPA classes provides control and consistency over your solution artifacts, accelerating your overall development cycle.
值得注意的是，根据术语的不同，物理结构可能不是必需收集的信息，可以以后在开发数据模型时再确定。
It is worth noting that, depending on the term, the physical structure may not be a mandatory aspect to collect and may be defined later or in the specification phase as data models are developed.
在使用RDA将逻辑数据模型转换为物理数据模型时，实体和属性名称根据以下规则被转换为表和列名称。
When transforming a logical data model to a physical data model using IDA, entity and attribute names are transformed to table and column names according to the following rules.
RDA提供了大量的功能在概念、逻辑和物理级别上定义数据模型，并且可根据需要在uml与informationEngineering标记法之间转换。
RDA provides extensive capabilities to define data models on a conceptual, logical and physical level and to convert between UML and Information Engineering notations as needed.
根据实际的物理对象，本文建立了系统三自由度动态数学模型。
The dynamic mathematics model is established from the actual physics objects in this paper.
根据电场计算方法和物理模型建立了空腹式接地装置的计算等效模型。
With the model and electric calculation method, it programmed for the calculation of hollow grounding device resistance.
看，这是物理学中的一种标准方式——首先通过一些计算来近似地得到粗略的结果，然后物理学家再根据给出的物理系统的行为方式来逐步完善这个模型。
Then physicists can refine the model bit by bit, according to how given physical systems are known to behave.
其次以典型三惯量机电位置伺服系统为研究对象，根据系统的物理定律建立了伺服系统的动力学模型。
Next take the typical three-inertia Electrical position servo system as the research object, according to the system physical law set up a dynamic model of servo system.
根据简化的推进系统物理模型，建立了贮箱、管路、自锁阀与过滤器，以及推力器的仿真数学模型。
The simulation models of tank, pipe, self-locking valve and filter, and thruster were established according to the simplified physic model of the propulsion system.
根据更换钢丝绳的依据和物理概念，建立了数学模型。
On the basis of the replacement of wire ropes and physical concepts, a math model is established.
根据密度和膨胀系数的物理定义，通过公式推导，建立了相应的数学模型。
The corresponding mathematic model has been established in accordance with the physical definition of the density and the expansion coefficient through formula derivation.
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。
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.
根据石油化工组分合并集总的原理，提出了28集总的重整反应动力学物理模型，并与其它文献报导的重整反应模型作了对比。
A 28 lumped kinetk physical model for reforming reaction was established according to the lumping principles of petrochemicals components, and compared with other reported models.
根据单脉冲过程电光开关气体放电的微观物理过程，提出了氦气放电的一维数值模型。
A one-dimensional numerical model for analyzing helium discharging of electro-optic switch driven by single-pulse process is proposed based on its microscopic physical mechanism.
根据等轴枝晶生长过程的物理机制，改进了等轴枝晶生长的溶质扩散模型。
In the light of physical mechanism of equiaxed dendrite growth, solute diffusion models for equiaxed growth was improved.
研究了窄谱带模型在气体辐射中的运用，根据气体介质的物理性质，计算了对应各个波长段的辐射强度和穿透率。
The dissertation calculates the spectral intensity and transmittance along the wavelength, using narrow band model, according to the physical property.
根据统计能量分析的基本物理模型，对撞击力所做的功进行了推算。
According to the physical model of the statistical energy analysis, the work done by the impact force is calculated.
根据试验结果，论述了燃速增加率与燃烧历程的关系，提出和探讨了燃烧物理模型问题。
Based on the results of tests, the relationship between burning rate augmentation and burning time is discussed. A physical model is also presented and studied.
最后，根据实验结果，提出了这种磷光体发光衰减过程的物理模型。
Finally the model of luminescence decay in this phosphor is proposed according to experimental results.
本文根据不连续岩石梁的物理力学特性提出了无拉力岩石梁的力学解析模型。
A no tension rock beam model has been presented according to the mechanical behaviors of cracked roof beam in this paper.
根据热型连铸技术原理，建立了热型连铸凝固过程一维稳态温度场的物理、数学模型。
Based upon the principle of thermal-die continuous casting process, the physical and mathematical models of one-dimensional steady-state heat transfer for temperature field are established.
根据实际工程资料建立黄土物理力学数据库，用BP算法建立预测模型。
The database should be created based on practical engineering, and a prediction model, built with the BP neural network.
文章根据毕沙定律、电流回路元和载流线圈的费曼模型，用普通物理的方法计算出载流线圈在远处一点的磁场分布。
Using Biot-Savart law and the Feynman's model, the paper suggested a simple method to calculate the magnetic field generated by a current loop with arbitrary shape.
本文根据树木的物理属性，建立枝条弯曲模型，实现枝条弯曲形态的生成算法。
In this paper, the physical attributes of trees are considered to build the(branch's) bending model and it realizes the synthesis algorithm for the shape of bended branch.
首先建立了场景的3d物理模型，然后根据黑体辐射理论分别计算出背景与目标的红外辐射特性。
First, a 3d physics model is constructed. Afterwards, the infrared radiation characters of background and targets are calculated respectively according to the blackbody radiation theory.
本文根据人工神经网络的一典型模型—反向传播模型，以及地震荷载下的各项土的物理—力学参数，建立了土液化类型的神经网络数学模型。
A typical artificial neural network model-back-propagation model was presented for prediction on the soil liquefaction type based on the physical parameters of soils under earthquake.
本文根据人工神经网络的一典型模型—反向传播模型，以及地震荷载下的各项土的物理—力学参数，建立了土液化类型的神经网络数学模型。
A typical artificial neural network model-back-propagation model was presented for prediction on the soil liquefaction type based on the physical parameters of soils under earthquake.
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