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3-Restricted arc connectivity of digraphs 期刊论文  OAI收割
DISCRETE MATHEMATICS, 2017, 卷号: 340, 期号: 10, 页码: 2341-2348
作者:  
Lin, Shangwei;  Jin, Ya'nan;  Li, Chunfang
  |  收藏  |  浏览/下载:20/0  |  提交时间:2018/07/30
Centroid localization algorithm based on bicubic interpolation gray square weighted (EI CONFERENCE) 会议论文  OAI收割
2012 3rd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2012, December 22, 2012 - December 23, 2012, Beihai, China
作者:  
Zhou J.
收藏  |  浏览/下载:152/0  |  提交时间:2013/03/25
The 3D coordinates of measured point is embodied in 2D image coordinate of the optical characteristic point via the visual measurement system. Based on the gray square weighted centroid localization algorithm  the paper presents bicubic interpolation gray square weighted centroid localization algorithm  increases the number of effective pixels around the optical characteristic point imaging center  and reduces noise error via the gray square weighted  improves the imaging center location accuracy of optical characteristic point  realizes the accurate location of the optical characteristic points. Results indicate application of the proposed algorithm to location  the standard tolerance along the direction of x is 0.0022 Pixel  the standard tolerance along the direction of y is 0.0023 Pixel  compared with the others  the standard tolerance is minimum and discrete to a lesser degree distancing ideal image point  that is  the proposed algorithm has higher location accuracy. The maximum tolerance along the direction of x is 0.008 Pixel  the one along the direction of y is 0.007 Pixel  compared with the other two algorithms  the maximum tolerance is minimum.Results indicate that the stability of the proposed algorithm is better. (2013) Trans Tech Publications  Switzerland.  
An improved upper bound for the Laplacian spectral radius of graphs 期刊论文  OAI收割
DISCRETE MATHEMATICS, 2009, 卷号: 309, 期号: 21, 页码: 6318-6321
作者:  
Lu, Mei;  Liu, Huiqing;  Tian, Feng
  |  收藏  |  浏览/下载:9/0  |  提交时间:2018/07/30
Study on color model conversion for camera with neural network based on the combination between second general revolving combination design and genetic algorithm (EI CONFERENCE) 会议论文  OAI收割
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Li Z.;  Zhou F.;  Wang C.;  Li Z.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
Munsell color system is selected to establish the mutual conversion between RGB and L*a*b* color model for camera. The color luminance meter and CCD camera synchronously measure the same color card  XYZ value is gotten from the color luminance meter  the training error is 0.000748566  it can show that the method combining second general revolving combination design with genetic algorithm can optimize the hidden-layer structure of neural network. Using the data of testing set to test this network and calculating the color difference between forecast value and true value  the color picture captured from CCD camera is expressed for RGB value as the input of neural network  and the L*a*b* value converted from XYZ value is regarded as the real color value of target card  which the difference is not obvious comparing with forecast result  the maximum is 5.6357 NBS  namely the output of neural network. The neural network of two hidden-layers is considered  the minimum is 0.5311 NBS  so the second general revolving combination design is introduced into optimizing the structure of neural network  and the average of color difference is 3.1744 NBS.  which can carry optimization through unifying project design  data processing and the precision of regression equation. Their mathematics model of encoding space is gained  and the significance inspection shows the confidence degree of regression equation is 99%. The mathematics model is optimized by genetic algorithm  optimization solution is gotten  and function value of the goal is 0.0007168. The neural network of the optimization solution is trained  
On the Randic index 期刊论文  OAI收割
JOURNAL OF MATHEMATICAL CHEMISTRY, 2005, 卷号: 38, 期号: 3, 页码: 345-354
作者:  
Liu, HQ;  Lu, M;  Tian, F
  |  收藏  |  浏览/下载:11/0  |  提交时间:2018/07/30
On the Laplacian spectral radius of a graph 期刊论文  OAI收割
LINEAR ALGEBRA AND ITS APPLICATIONS, 2004, 卷号: 376, 页码: 135-141
作者:  
Liu, HQ;  Lu, M;  Tian, F
  |  收藏  |  浏览/下载:17/0  |  提交时间:2018/07/30