Development of a geometric tolerance code tagging system based on the AutoCAD 基于AutoCAD的形位公差代号标注系统的开发
Depending on this system a design can carries out the geometric scheming part drawing, NC source code creating of a gear base in shorter time. 利用该系统设计者能够在较短的时间内完成齿坯的几何设计,零件图绘制,NC源代码的生成。
The issue predigests geometric structure of SPRR-300 reactor core with repeated structure geometry feature of MCNP code and sets up the irradiation channel mathematical model to calculate the neutron flux. 利用MCNP程序的重复几何结构功能,对SPRR-300的堆芯几何结构进行了简化处理,建立了该堆辐照孔道中子注量率分布计算的数学模型。
Error analysis shows that the displacement measuring error entirely depends on geometric positioning precision of the first bar code center. 仿真结果表明,整个对准系统的定位误差与机械导轨的位移测量误差处于同一数量级;误差分析表明:位移测量误差完全取决于首条码中心几何定位。
Survey on coordinate measure-ment, geometric modeling and RP or NC code generation from measured data points 复杂曲面快速测量、建模及基于测量点云的RP和NC加工
Based on the sculpture surface data file obtained by the computer aided geometric modeling the cutter offset required in the numerical control machining has been analysed and calculated The NC code file for numerical control machining has been produced. 本文在计算机辅助造型获得的表面数据文件的基础上,对数控加工中所需要的刀偏量进行了分析计算,产生了适合数控力。
Four geometric attributes, such as chain code, convex/ concave, circular/ rectangular, and open/ closed attribute, were extracted from a scanned point set and presented to the ANN module for feature recognition. 该算法先从扫描点云中抽取四大基本几何属性:方向、凹/凸性、圆/直性、开/闭性,接着输入点的几何属性到人工神经网络(ANN)进行特征识别。
Research in this paper includes boundary tracing, transformation algorithms among chain code, region filling algorithm, obtaining geometric characteristic of image and form processing software based on chain code, algorithm and application of chain code are researched widely. 本文从边界跟踪、链码转换、区域填充、图像几何特征的计算到基于链码的表格处理软件,对链码相关的算法和链码的应用问题进行较为宽幅度的研究。
A series of numerical model tests were performed to investigate the effects of geometric and mechanical heterogeneity ( pre-existing faults) of rocks on earthquake precursors using the newly-developed rock progressive failure analysis code ( RFPA~ ( 2D)). 使用新开发岩石破裂过程分析软件(RFPA2D),通过一系列模型实验,研究岩石中预制断层面几何特征和力学非均匀性对地震前兆产生的影响。
Based on shape features, feature extraction adopted geometric characteristics in the region and adopted chain code on the edge of the region. 特征提取基于形状特征,在区域内用了几何特征,区域边界用链码。
These operations make full preparations for the subsequent recognition research. ( 2) It designs the recognizer in multi classifier fusion thought, and proposes single stroke classification method which is the combination of geometric features and eight direction chain code features. 这些操作为后续的识别研究做了充分的准备。(2)以多分类器融合的思想对识别器进行设计,提出了一种几何特征和八方向链码特征相结合的单笔划分类方法。
We select the appropriate threshold for geometric features by analyzing the data collection of the characteristics of the sample set. Meanwhile, it has also carried on the processing of duplicate removal for eight direction chain code of strokes, and selected more appropriate critical angle. 通过对所收集样本的特征数据集进行分析,为几何特征选择了合适的阂值;同时,也对笔划的八方向链码特征进行了去重的处理,并选出比较合适的临界角。
After inputting of calculating parameters including pipes geometric parameters, location parameters and system parameters, system automatically calculates and generates NC code. 在数控系统中输入管件几何、位置参数以及相关系统参数后,数控系统自动完成计算,并生成数控加工代码。
In the vector spacial database, these entities describe the association between property characteristics and geometric features by topological structure. The link of them is the identification code ( ID). 在矢量型空间数据库中,这些实体通过拓扑结构来描述属性特征和几何特征的联结关系,其联系纽带是实体的标识码(ID)。
In addition, for the geometric feature extraction, we propose a chain code based method which can extract the geometric feature robustly for both static images and image sequences. 此外,针对图像几何特征提取,本文提出了基于链码的思想,该方法对静态图像和图像序列均可提取较鲁棒的几何特征。
Then the geometric error compensation software was used to establish geometric error model and compensate the NC code of blade test part. 运用开发的软件完成了该机床的几何误差建模,并对叶片测试零件的NC代码进行误差补偿。
This paper mainly discusses and studies the following issues: ( 1) According to the geometric characteristics of the strokes of the notes designed, electing eight geometric features and one eight direction chain code which is suited for the strokes set. 本论文中主要讨论研究了下面几个问题:(1)根据所设计的音符笔划的几何特征,选出了适合于本笔划集的8个几何特征和1个八方向链码特征。
And bilinear interpolation method was used to correct geometric distortion, solve the impact of image distortion on the bar code information. 利用双线性插值变换进行失真矫正,解决了图像畸变对条码信息的影响。