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Description: 该源码包含了常见的图像形态学算法，如图像基本逻辑运算，阈值分割，边缘处理，孔洞填充-the source contains common morphological image algorithms, such as images basic logic operations, thresholding segmentation, edge, filled Hole
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Size: 98759 |
Author: jiangxia |
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Description: 通过三维有限元计算来研究含圆孔有限厚度板的圆孔边缘应力场,找出了应力集中系数与板的厚度、
圆孔半径之间的关系,同时还分析了圆孔边缘的三维应力约束程度和三维应力约束区域的大小. 研究结果表
明:离面应力约束系数在板的中面最大,而在表面为0 ,三维应力约束影响区域的长度约为板厚的一半 应力
集中系数沿厚度的分布是不均匀的,其最大值及位置与厚度有关 有限厚度板中面的应力集中系数及其最大
值均大于平面应力或平面应变的应力集中系数 对含圆孔任意厚度板的应力集中问题,按平面应力或平面应
变来考虑是不安全的 Sternberg 等人对含圆孔任意厚度板的应力分布及应力集中系数的近似三维求解,仅适
用于厚度较小的板,当板超过一定厚度时同样也是不安全的.
关键词: 应力集中系数 有限元分析 有限厚度板-through 3D FEM to study with limited thickness of plate hole hole edge of the stress field, identify the stress concentration factor with the plate thickness, the radius hole of the relationship between also analyzed the edge of the hole three-dimensional and three-dimensional stress extent constrained the size of the area. The results showed : Stress from the restrictive factor in the board faced the greatest, and the surface of 0, the three-dimensional effect of the length of the regional thickness of about half of the stress concentration factor along the thickness of the distribution is uneven, and the location of its maximum thickness and the limited thickness of the slab surface stress concentration factor and the maximum value is greater than or plane stress level plane strain, the
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Size: 59710 |
Author: 张开 |
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Description: 该源码包含了常见的图像形态学算法，如图像基本逻辑运算，阈值分割，边缘处理，孔洞填充-the source contains common morphological image algorithms, such as images basic logic operations, thresholding segmentation, edge, filled Hole
Platform: |
Size: 98304 |
Author: jiangxia |
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Description: 通过三维有限元计算来研究含圆孔有限厚度板的圆孔边缘应力场,找出了应力集中系数与板的厚度、
圆孔半径之间的关系,同时还分析了圆孔边缘的三维应力约束程度和三维应力约束区域的大小. 研究结果表
明:离面应力约束系数在板的中面最大,而在表面为0 ,三维应力约束影响区域的长度约为板厚的一半 应力
集中系数沿厚度的分布是不均匀的,其最大值及位置与厚度有关 有限厚度板中面的应力集中系数及其最大
值均大于平面应力或平面应变的应力集中系数 对含圆孔任意厚度板的应力集中问题,按平面应力或平面应
变来考虑是不安全的 Sternberg 等人对含圆孔任意厚度板的应力分布及应力集中系数的近似三维求解,仅适
用于厚度较小的板,当板超过一定厚度时同样也是不安全的.
关键词: 应力集中系数 有限元分析 有限厚度板-through 3D FEM to study with limited thickness of plate hole hole edge of the stress field, identify the stress concentration factor with the plate thickness, the radius hole of the relationship between also analyzed the edge of the hole three-dimensional and three-dimensional stress extent constrained the size of the area. The results showed : Stress from the restrictive factor in the board faced the greatest, and the surface of 0, the three-dimensional effect of the length of the regional thickness of about half of the stress concentration factor along the thickness of the distribution is uneven, and the location of its maximum thickness and the limited thickness of the slab surface stress concentration factor and the maximum value is greater than or plane stress level plane strain, the
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Size: 59392 |
Author: 张开 |
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Description: 提出了一种基于CCD图像的塑料齿轮齿形缺陷检测方法。采用A102FCCD数字摄像头采集塑料齿轮的图像, 经
过IEEE1394数字接口卡传输到计算机。对含有噪声的原始数字图像实施平滑处理、图像分割、轮廓提取及细化等处理,
使图像转变成易于检测的单像素宽边缘信息。检测了齿轮中心孔的圆心, 进而对齿轮齿形缺陷进行检测。理论分析及实验
结果表明该方法检测速度快、精度高, 满足产品在线检测的要求。-A CCD image of the plastic-based gear defect detection methods. A102FCCD using digital camera images collected plastic gears, the transmission IEEE1394 digital interface card to a computer. Containing the original digital image noise smoothing the implementation of treatment, image segmentation, contour extraction and refining, such as treatment, so that image into a single easy to detect the edge information pixels wide. Detection of the gear center hole of the center of a circle, and thus gear defect detection. Theoretical analysis and experimental results show that the method of detection of high speed and accuracy to meet the requirements of product-line detection.
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Size: 391168 |
Author: 高子 |
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Description: 利用MATLAB对扩频信号进行检测和参数估计，结果表明本方法具有在低信躁比下检测的优势-The use of MATLAB for spread spectrum signal detection and parameter estimation results show that this method is in the low than under the letter impatient edge detection
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Size: 2048 |
Author: 王将 |
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Description: This edition addresses these new elements of the printed circuit processes, both revolutionary
and evolutionary, while still maintaining its foundation on the basics of the technology.No
matter how sophisticated the leading edge of the technology becomes, at the core of all
printed circuits is the plated-through hole in its various forms.
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Size: 14547968 |
Author: jomata63 |
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Description: DistMesh giving a singular FEM matrix?-Hi
Anyone here with some experience of using DistMesh in finite element code? I m solving the scalar Helmoltz equation in an annular region in 2D:
rho_1 < rho < rho_2
where rho_1 is the radius of a Perfect Electric Conducting cylinder and rho_2 is where the mesh is truncated using an Absorbing Boundary condition.
Now, I ve written code to mesh the region myself (by dividing the region into annular rings and picking a fixed number of points on each ring) and I ve written another program which uses DistMesh to mesh the region. I get a nice solution using my own meshing code but the FEM matrix becomes singular when I use DistMesh. This is the DistMesh Code I used:
Circle with hole
rABC=1.5
rCyl=0.5
fdstring=sprintf( ddiff(dcircle(p,0,0, f),dcircle(p,0,0, f)) ,rABC,rCyl)
fd=inline(fdstring, p )
box=[-2,-2 2,2]
[p,N]=distmesh2d(fd,@huniform,0.04,box,[])
I tried changing box and the 0.04 value (initial edge length). But every time, the matrix becomes sin
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Size: 37888 |
Author: skypigr |
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Description: 传说中，南极有一片广阔的冰原，在冰原下藏有史前文明的遗址。整个冰原被横竖划分成了很多个大小相等的方格。在这个冰原上有N个大小不等的矩形冰山，
这些巨大的冰山有着和南极一样古老的历史，每个矩形冰山至少占据一个方格，且其必定完整地占据方格。冰山和冰山之间不会重叠，也不会有边或点相连。
ACM探 险队在经过多年准备之后决定在这个冰原上寻找遗址。根据他们掌握的资料，在这个冰原上一个大小为一格的深洞中，藏有一个由史前人类制作的开关。
而唯一可以 打开这个开关的是一个占据接近一格的可移动的小冰块。显然，在南极是不可能有这样小的独立冰块的，所以这块冰块也一定是史前文明的产物。
他们在想办法把这 个冰块推到洞里去，这样就可以打开一条通往冰原底部的通道，发掘史前文明的秘密。冰块的起始位置与深洞的位置均不和任何冰山相邻。
这个冰原上的冰面和冰山都是完全光滑的，轻轻的推动冰块就可以使这个冰块向前滑行，直到撞到一座冰山就在它的边上停下来。冰块可以穿过冰面上所有没有冰山的区域，
也可以从两座冰山之间穿过。冰块只能沿网格方向推动。-According to legend, there is a vast Antarctic ice sheet, the ice sheet under the possession of the site of prehistoric civilization. If they had the entire ice sheet is divided into many equal-sized squares. N in the ice on the tip of a rectangle of varying sizes,
These huge Antarctic icebergs has and as old as the history of the tip of each of at least occupy a rectangular box, and will fully occupy the square. Do not overlap between the tip of the iceberg and there will not be connected to edge or point.
ACM expedition after the decision, after years of preparation in the ice to find sites. According to their information available in the ice sheet the size of a cell of a deep hole, possession of a prehistoric people made the switch.
The only you can open an account for this switch can be moved close to a grid of small ice cubes. Clearly, in the Antarctic is not possible to have such a small independent ice, so this ice must also be a product of prehistoric civilization.
They
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Size: 245760 |
Author: 胡灏 |
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Description: 在genesis里面自动加尾孔，应用非常方便，把它复制到陈放封边脚本的目录，就像运行封边脚本一样。-Automatic tail hole for genesis，Application is very easy to copy it to Chen Fang Edge scripts directory, run the edge as the same script.
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Size: 1024 |
Author: 邓烈焰 |
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Description: 圆形，孔型工件的尺寸测量，主要采用canny算子检测边缘，并进行亚像素细分，还有GUI，测量精度在0.1-Circular hole workpiece size measurement using canny operator edge detection and subpixel, as well as GUI, measurement accuracy of 0.1mm
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Size: 149504 |
Author: 杨亚普 |
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Description: 在NX平台上，利用二次开发工具创建孔、型腔、边倒圆，并进行相对定位-On the platform of NX, using NX second development tools to create a hole, cavity, edge rounding, and relative positioning
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Size: 2048 |
Author: 周星 |
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Description: 图像特征分析实例，包括轮廓跟踪、边界检测、消除小洞、计算形心、计算不变矩、细化算法等。-Examples include image feature analysis, contour tracking, edge detection and elimination of small hole, calculate the centroid, moment invariants, thinning calculation.
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Size: 3345408 |
Author: ycr40 |
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Description: 对人脸识别的基本进程进行综述,介绍了空间转换及识别的方法；采用低通滤波处理策略,在总结和分析这些处理方法的基础上,运用填孔处理和边缘检测的人脸识别方法进行人脸识别工作；将几种边缘检测算法与人脸识别相结合进行检测,其识别率有可观的提升。(The basic process of face recognition is reviewed, and the method of space conversion and recognition is introduced. On the basis of summarizing and analyzing these processing methods, the face recognition method is carried out by using the face recognition method of hole processing and edge detection, and several edge detection algorithms are combined with face recognition based on the low pass filtering processing strategy. The detection rate has a considerable increase in recognition rate.)
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Size: 2003968 |
Author: 伯爰虞 |
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