应用实体

Cutting discontinuities's 3-D model could get cutaway view and date directly on AutoCAD plat, it will be good for research instability clastic mass. The author select rock mass from damsite in Laxiwa hydroelectric station as object to which information processing system on rock mass structure is applied.

通过结构面的数学建模，使采集所得结构面数据的处理实现了信息化，程序化，应用多功能数据库在计算机上人机交互划分岩体结构，初步实现岩体结构的信息化，并且通过结构面与相关实体的真三维实体模型的建立，既可清晰直观的展示结构面模型的空间形象，又可容易的切割模型并获取切图的数据，对不稳定块体的分析研究提供了强有力的辅助手段。

Affine geometry is often assumed in model-based vision systems because fewer features are required to compute model pose uniquely under affine projection and the perspective projection.

根据三维实体的二维透视图像构造关于该实体的不变因子是一项困难的任务，也是当前将不变因子理论应用于计算机视觉的一个主要目标。

Using the methods, we can improve the autoimmunization's degree and predigest the complicacy of modeling. RDB will benefit from the method and improve its application value.

利用XML技术实现对象模型向实体关系模式的转换，可以提高实体关系模式建模的自动化程度，简化建模的复杂程度，有利于将实体关系模式和关系数据库融合到应用面向对象技术的系统开发过程中。

Then this paper introduces the definition of conditional random fields, the graph structure, potential functions, parameters estimation and probability computations.

进一步地，将条件随机场模型应用于中文命名实体识别任务，提出了适合于各类中文命名实体的特征模板，并通过实验进行验证，确定了有效特征。

First of all,the procedure and methods of the implementation of the STEP neutral file are introduced,and the EXPRESS representation for the geometric and non geometric entities of a 2D engineering drawing are also discussed.

首先简要介绍了STEP中性文件实施的过程和方法，以及二维工程图IGES和STEP实体的对应关系，然后介绍了二维工程图基本几何实体和文本注释、尺寸标注等非几何信息的EXPRESS描述，及其映射生成STEP中性文件的方法，并给出一个实际工程图的STEP中性文件（由自行研制的AP201应用工具的后处理器生成），最后对STEP中性文件的优缺点进行了评价。

this article is research of application of 3d design software ug carries on the components entity design and movement analysis to the boring lathe main axle system.through the method of virtual design and analysis, obtains the design manufacture or the optimized design reference information and data .first complete the boring lathe main axle system's entity components modelling and assembles using the ug formidable entity modelling function and the assembly function,and then establishes the scenario model under the ug organization analysis function module and completes the movement to analyze.obtains on the main axle components the specified point speed, the acceleration and the displacement on a ideal characteristic parameter and output analysis result of obtains office of destination law of motion by the graph form.

本文是应用3维软件ug对镗床主轴系统进行0件实体设计和运动分析的研究。通过虚拟设计的方法进行设计与分析，得到设计制造或者优化设计的参考信息和数据。应用ug强大的实体造型功能和装配功能首先完成镗床主轴系统的实体0件建模和组装，再对装配好的组件在ug机构分析功能模块下建立scenario模型并完成运动分析，得到主轴0件上特定点的速度、加速度和位移等理想的特征参数并以图表的形式输出分析结果得到指定点的运动规律。

According to the tolerance principle in GB/T 4249-1996,GB/T16671-1996 of national standard, we can put forward some application law of examining the wall thickness of the axle sleeve parts, which can be put into manufacturing practice.

它既可以应用于被测要素，也可以应用于基准要素。最小实体要求适用于中心要素。最小实体要求是控制被测要素的实际轮廓处于其最小实体实效边界之内的一种公差要求[1] 。

The main contents are as follows: Creating finite element model of cradle carriage, top carriage and trail of the howitzer. The structural static stress analysis of are dealt with finite element program system I-DEAS. For accuracy and computation cost, the nonlinear finite element structural dynamics model of the howitzer is created with different elements such as solid elements, shell elements and beam elements.

主要包括以下几个方面工作：建立了该炮摇架、上架和下架的三维有限元静力学模型，并应用I－DEAS有限元软件进行了强度分析；顾及计算准确性和计算成本，应用实体单元、壳单元和梁单元相结合的方法建立了该炮的非线性有限元结构动力学模型。

And then, this article makes full illustration of the RP technology and study on intomb messages describing, fault-tolerance dicing, the Laminated Object Manufacturing which is applied greatly according to the characteristics of CAS development. On the base of author's own scientific research work, this article gives a typical developing mode for new motorcycle products, discusses the trend towards integration of RP technology and the application of the RE/RP-based Rapid Mould Manufacture, especially the cooperative mechanism of infuse plastic product rapid manufacture and the development trend of RT technology as well as the developing policy to that.

根据CAS产品开发的特点，对RP技术作了全面的论述，研究了RP制造中实体信息描述与容错切片，对应用范围较广的叠层实体制造工艺的工艺过程作了详细的研究，并结合作者的科研工作，提出了一种典型的摩托车新品的开发模式，讨论了RP技术的集成化发展趋势和基于RE／RP技术的快速模具制造技术的应用特别是注塑产品快速制造的协同机制。

Based on analysis and compare of all kinds of precept-sorting of feature of plastic product for the different structural plastic product, a 3D feature library of plastic product was built on the platform by integrating Feature-Modeling technique with parametric technique. The feature schleps its information of non-geometry by database-externed technique of the entity. After building the database of plastic material, the module of choice of plastic material is developed by technology of ODBC. The plastic product can be sculpted by calling of feature of plastic product and inputting parameters interactively.

针对不同结构类型的塑件，在全面分析、比较塑件特征分类的各种方案的基础上，采用三维特征建模技术和参数化技术，建立了注塑产品的三维特征库；应用实体扩展数据库技术，使特征携带非几何信息；再在建立塑料物性数据库的基础上，采用ODBC技术，开发了塑料材料选择模块；通过塑件特征的调用和人机交互输入参数的方法进行塑件三维造型，再把塑件的三维实体和塑件的非几何信息结合起来，生成塑件全信息模型。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。