排序方式: 共有22条查询结果,搜索用时 62 毫秒
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为实时测量多晶硅棒直径,研制了多晶硅棒径在线视频检测系统.该系统采用双相机成像的机器视觉方法实现目标硅棒的监测,采用左中右差分的图像分割技术提取目标,采用基于小区域的质心跟踪算法跟踪目标.系统标定后,可实时测量还原炉内多晶硅棒的直径.实验结果表明:该系统能检测微弱边缘,在直径为8~150 mm的范围内,测量精度高于工业视觉图像测量的要求. 相似文献
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Capacity and QoS based codebook construction for MIMO precoded spatial multiplexing systems with limited feedback 总被引:1,自引:0,他引:1
This paper deals with the design and performance analysis of transmit precoder optimization for multiple input multiple output (MIMO) systems with limited feedback of channel state information. A capacity criterion based optimal codebook construction algorithm for MIMO precoded spatial multiplexing systems is pre-sented. The optimal precoder structure combining precoding and power allocation is employed. Simulation results show that the capacity criteria based codebook can achieve higher capacity than that of equally power allocation based codebook of previous research. 相似文献
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西安公交总公司为记取成都公交车燃烧事故教训,杜绝此类事故的发生,提出四项措施防范。一是加强公交各线路站点值班和线路巡查,强化对路线的现场管理,检查安全隐患,消除事故根源;二是对车辆和重点部门进行安全排查,重点对车辆的油、气、电路,天然气阀门及接口、车辆消 相似文献
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水下等离子体声源聚焦性能仿真及误差分析(英文) 总被引:2,自引:0,他引:2
Focused underwater plasma sound sources are being applied in more and more fields. Focusing performance is one of the most important factors determining transmission distance and peak values of the pulsed sound waves. The sound source’s components and focusing mechanism were all analyzed. A model was built in 3D Max and wave strength was measured on the simulation platform. Error analysis was fully integrated into the model so that effects on sound focusing performance of processing-errors and installation-errors could be studied. Based on what was practical, ways to limit the errors were proposed. The results of the error analysis should guide the design, machining, placement, debugging and application of underwater plasma sound sources. 相似文献
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根据包西铁路通道建设中双绕段改造的施工过程,尤其是田庄至呼家塔车站间双绕段的方案优化和施工组织,详细介绍了双绕段施工组织的特点、难点,以及施工过程中的注意事项。 相似文献
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<正>近年来随着我国加大基础设施建设投入,非自愿性移民的征迁安置问题越来越突出。一些大型工程项目,如水库工程、高速公路工程、城市改造工程等,征迁安置是制约工程的关键因素,而统计调查是征迁安置工作的主要基础工作之一。笔者通过全过程参与世界银行贷款项目中国公路项目Ⅲ、中国公路项目Ⅳ的征迁安置工作,体会到,运用科学的统计调查方法对搞好征迁安置工作尤为重要。 一、统计调查在征迁安置工作中的作用 统计调查从项目论证,到项目实施及工程竣工后的社会评估,贯穿于工程全过程,其作用 相似文献