Iris Localization Based on Edge Searching Strategies

An iris localization scheme based on edge searching strategies is presented. First, the edge detection operator Laplacian-of-Gaussian （LOG） is used to iris original image to search its inner boundary. Then, a circle detection operator is introduced to locate the outer boundary and its center, which is invariant of translation, rotation and scale. Finally, the method of curve fitting is developed in localization of eyelid. The performance of the proposed method is tested with 756 iris images from 108 different classes in CASIA Iris Database and compared with the conventional Hough transform method. The experimental results show that without loss of localization accuracy, the proposed iris localization algorithm is apparendy faster than Hough transform.     

一种车牌定位的新方法

研究了一种定位车牌区域的新方法,该方法首先对车牌图像进行边缘检测,然后进行骨骼化处理,最后通过线扫描定位车牌。实验证明使用该方法定位车牌的准确率达到了98.8%,平均耗时0.1s,同时对光线较昏暗、车牌较模糊的图像也能实现比较准确的定位。     

准双曲面齿轮传动的轮齿接触分析

本文推导了准双曲面齿轮传动的轮齿接触分析方法，包括齿面接触分析和边缘接触分析，代表了齿轮啮合的完整过程。该方法便于在计算机上实现，通过计算机数值仿真，可准确地显示不同参数，不同误差的齿轮啮合过程和性能，能有效地降低产品成本，提高产品质量。     

上海帕萨特轿车防盗系统的检测与维护

介绍了上海帕萨特轿车防盗系统测量数据块的读取方法,点火开关钥匙的匹配,钥匙丢失时的操作方法,更换组合仪表时的操作方法,更换发动机控制单元时的操作方法(包括更换说明,更换条件必须有认可的点火钥匙及更换方法),防盗装置发生故障情况下的操作方法。     

Torsional behavior of GFRP-reinforced concrete pontoon decks with and without an edge cutout

Using glass fiber-reinforced polymer (GFRP) bars in precast concrete pontoon decks in aggressive marine environments would eliminate corrosion problems encountered with steel reinforcement. Although wave action usually subjects pontoon decks to torsion, but little is known about the behavior of such structures. Moreover, nothing is known about the effects of cutouts on the torsional behavior of pontoon decks. This study experimentally investigated the torsional behavior of GFRP-reinforced concrete (RC) pontoon decks in terms of the effect of edge cutouts, reinforcement-bar distribution, and rotation direction. The results show that the bar configuration affected the failure behavior and torsional capacity of the GFRP-reinforced concrete decks under torsion. The decks with double-layer reinforcement exhibited slower and narrower cracking growth in the post-cracking stage than the decks with single-layer reinforcement. In addition, the edge cutouts reduced the cracking torque of the solid rectangular decks by an average 17%. The torsional behavior of the GFRP-reinforced planks can be accurately described by the ACI318-14 equation in the cracking stage, while the decks’ post-cracking torsional rigidity can be predicted accurately from the contribution of the GFRP bars.