城市街道边缘空间的研究

城市街道的各种边缘空间与人的行为活动密切相关，重视、利用边缘，是设计者实现自己设计意图的重要环节。将空间的创造和行为的预见结合起来，能为人们提供良好的物质环境。     

Iris Localization Algorithm Based on Improved Generalized Symmetry Transform

Accuracy and fastness of iris localization are very important in automatic iris recognition. A new fast iris localization algorithm based on improved generalized symmetry transform (GST) was proposed by utilizing iris symmetry. GST was improved in three aspects: 1 ) A new distance weight function is defined. The new weight function, which is effective in iris localization, utilized the characteristic of irises that the iris is a circular object and it has one inner boundary and one outer boundary. 2) Each calculation of the symmetry measurement of a pair of symmetry points was performed by taking one point of a pair as the starting point of the transformation. This is the most important reason for fast iris localization, due to which, repetitious computation was largely excluded. 3) A new phase weight function was proposed to adjust GST to locate circle target much better because the inner part of iris is darker than the outer part. The edge map of iris image was acquired and GST was only implemented on the edge point, which decreased computation without loss of accuracy. The modification of distance weight function and phase weight function leads to the accuracy of localization, and other ideass peed up the localization. Experiments show that the average speed of new algorithm is about 7.0-8.5 times as high as traditional ones including integro-differential operator and Hough transform method.     

内蒙古特色产业的比较优势向竞争优势的转化

区域特色产业是利用和发挥比较优势,形成和发展竞争优势的结果。笔者从比较优势出发分析了内蒙古以畜牧经济为基础的特色产业的竞争优势,并从保护和建设草原、培育龙头企业、扶持和引导特色产业、树立特色品牌、构建特色产业链和产业群落、推进制度创新等几个方面提出了加强特色产业竞争力的具体对策。     

Registration Method for CT-MR Image Based on Mutual Information

Medical image registration is the process of finding ageometric transformation between two image-based coordi-nate systems that have the same patient-based coordinates ,i .e .the same anatomic locations .The registered multi-mo-dality images lead to impro…     

一种提取模糊图像边缘区域的双阈值分割方法

针对目标和背景在同一平面的图像，提出一种双阈值分割方法获取图像由目标过渡到背景的边缘区域，并将提取的边缘区域平均梯度用于图像清晰度的评价，评价效果较好．     

一类边列表3-染色图

如果S是图G的割边集,△(G(S))是边导出子图G(S)的最大度,G1,G2是G\S的连通分支,且G1,G2分别是边列表k1,k2-染色的,则图G的边列表染色指标不超过max{k1,k2} 2△(G(S)),由此给出一类边列表3-染色图,并且证明完全图k4是边列表3-染色的.     

浅谈数学的作用

作者从数学是什么?数学的应用、工具性、教育价值等方面论述了数学的作用.     

黄土高原西缘地区末次冰期气候不稳定事件

通过野外考察、系统采样和测试分析，在同格陵兰冰芯氧同位素资料对比的基础上，结合年龄数据讨论分析了黄土高原西缘地区末次冰期以来的古气候变化，将研究区古气候总体划分为三个演化阶段：Ⅰ、末次冰期间冰阶（30～20kaB，P．），气候较为冷湿；Ⅱ、末次冰期冰盛期（20～10kaB．P．），气候寒冷干燥；Ⅲ、全新世（10～3kaB．P．），冬季风消退夏季风增强，气候逐渐变暖．发现黄土高原西缘地区记录了多次末次冰期以来的典型的气候突变事件，包括3次H事件，时间分别为：29、23、16kaB．P．；时间对应而且变化趋势也很相似的YD事件和两次D／O旋回事件，时间上的滞后现象有可能是区域性差异的缘故．     

异形阳台边梁设计的计算方法

从工程施工、设计中常见的质量问题分析入手,着重讨论了异形阳台边梁的受力性能,并提出了解决该问题的办法,即采用本人设计的钢筋砼受弯、剪、扭构件配筋实用计算程序。     

CCD测量液体折射率时边缘检测算法的改进

采用CCD作为光电探测器改进传统阿贝折射仪,进行液体折射率的自动测量,其关键是对CCD采集到的图像信号进行边缘检测,提出应用Canny算子对数字化图像进行处理,以获得亚像素分辨率边缘位置数据的数值算法。该算法能较好地抑制噪声干扰并有较高的边缘定位精度。