In the proposed system for online inspection of steel balls, a diffuse illumination is developed to enhance defect appearances and produce high quality images. To fully view the entire sphere, a novel unfolding method...In the proposed system for online inspection of steel balls, a diffuse illumination is developed to enhance defect appearances and produce high quality images. To fully view the entire sphere, a novel unfolding method is put forward based on geometrical analysis, which only requires one-dimensional movement of the balls and a pair of cameras to capture images from different directions. Moreover, a realtime inspection algorithm is customized to improve both accuracy and efficiency. The precision and recall of the sample set were 87.7% and 98%, respectively. The average time cost on image processing and analysis for a steel ball was 47 ms, and the total time cost was less than 200 ms plus the cost of image acquisition and balls' movement. The system can sort 18 000 balls per hour with a spatial resolution higher than 0.01 mm.展开更多
设计和实现了一种全新的在线文件系统检查工具—OnlineFSCK(On-Line File System Checker).OnlineFSCK可以对在线的文件系统进行一致性检查.利用OnlineFSCK对文件系统进行检查时,文件系统可以继续正常提供服务.提出和实现了一种对在线...设计和实现了一种全新的在线文件系统检查工具—OnlineFSCK(On-Line File System Checker).OnlineFSCK可以对在线的文件系统进行一致性检查.利用OnlineFSCK对文件系统进行检查时,文件系统可以继续正常提供服务.提出和实现了一种对在线文件系统生成镜像的算法,并将这个算法与现有的文件系统检查工具相结合,最终达到对在线文件系统进行检查的目的.针对ext3文件系统实现了OnlineFSCK的原型,实验结果表明,OnlineFSCK在满足对性能的要求的前提下,能够达到与传统文件系统检查工具相同的检查能力.OnlineFSCK的实现中没有修改文件系统的内核源码,可以扩展支持多种文件系统.展开更多
德国波茨坦2014年6月12日电/美通社/--〈br〉 网络罪犯盗取了我的私人数据，并在网上免费提供，使得其他人可以访问并进行滥用了吗？全球互联网用户现可使用德国波茨坦大学（University of＆amp;nbsp；Potsdam）哈索-普拉特纳IT系统工...德国波茨坦2014年6月12日电/美通社/--〈br〉 网络罪犯盗取了我的私人数据，并在网上免费提供，使得其他人可以访问并进行滥用了吗？全球互联网用户现可使用德国波茨坦大学（University of＆amp;nbsp；Potsdam）哈索-普拉特纳IT系统工程研究所（Hasso Plattner Institute for IT Systems Engineering）提供的免费服务回答这一问题。然后系统将搜索互联网，获得与他们有关的免费私人数据。展开更多
文摘In the proposed system for online inspection of steel balls, a diffuse illumination is developed to enhance defect appearances and produce high quality images. To fully view the entire sphere, a novel unfolding method is put forward based on geometrical analysis, which only requires one-dimensional movement of the balls and a pair of cameras to capture images from different directions. Moreover, a realtime inspection algorithm is customized to improve both accuracy and efficiency. The precision and recall of the sample set were 87.7% and 98%, respectively. The average time cost on image processing and analysis for a steel ball was 47 ms, and the total time cost was less than 200 ms plus the cost of image acquisition and balls' movement. The system can sort 18 000 balls per hour with a spatial resolution higher than 0.01 mm.
文摘设计和实现了一种全新的在线文件系统检查工具—OnlineFSCK(On-Line File System Checker).OnlineFSCK可以对在线的文件系统进行一致性检查.利用OnlineFSCK对文件系统进行检查时,文件系统可以继续正常提供服务.提出和实现了一种对在线文件系统生成镜像的算法,并将这个算法与现有的文件系统检查工具相结合,最终达到对在线文件系统进行检查的目的.针对ext3文件系统实现了OnlineFSCK的原型,实验结果表明,OnlineFSCK在满足对性能的要求的前提下,能够达到与传统文件系统检查工具相同的检查能力.OnlineFSCK的实现中没有修改文件系统的内核源码,可以扩展支持多种文件系统.
文摘德国波茨坦2014年6月12日电/美通社/--〈br〉 网络罪犯盗取了我的私人数据，并在网上免费提供，使得其他人可以访问并进行滥用了吗？全球互联网用户现可使用德国波茨坦大学（University of＆amp;nbsp；Potsdam）哈索-普拉特纳IT系统工程研究所（Hasso Plattner Institute for IT Systems Engineering）提供的免费服务回答这一问题。然后系统将搜索互联网，获得与他们有关的免费私人数据。
