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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 Spatial-temporal heterogeneity of hand, foot and mouth disease and impact of meteorological factors in arid/ semi-arid regions: a case study in Ningxia, China 期刊论文 BMC PUBLIC HEALTH, 2019, 卷号: 19, 期号: 1, 页码: 11 作者:  Li, Jie;  Zhang, Xiangxue;  Wang, Li;  Xu, Chengdong;  Xiao, Gexin 收藏  |  浏览/下载：17/0  |  提交时间：2020/05/19 Hand  Foot and mouth disease  Spatial-temporal variation  GeoDetector  Bayesian space-time hierarchical model  Ningxia   夯土建筑遗址表面温度变化特征及预报模型 期刊论文 岩土力学, 2011, 卷号: 32, 期号: 3, 页码: 867-871 作者:  孙博;  周仲华;  张虎元;  张永霞;  郑龙 收藏  |  浏览/下载：4/0  |  提交时间：2016/07/27 夯土建筑遗址  红外热成像法  表面温度变化规律  预报模型  Daily temperatures  Data support  Earthen architectures  Field monitoring  Prediction model  Rammed earth  Rammed earthen architecture ruins  Significant factors  Soil mass  Soil strength  Surface temperatures  Temperature differences  Time and space  Variation law of surface temperature  Wall surfaces   大豆综合比较优势时空特征动态变化研究 期刊论文 2010, 2010 朱犁; 孙玲; ZHU Li 收藏  |  浏览/下载：2/0 Disc varifocal mechanism to improve efficiency of scene matching navigation system (EI CONFERENCE) 会议论文 2009 2nd International Conference on Future Information Technology and Management Engineering, FITME 2009, December 13, 2009 - December 14, 2009, Sanya, China Leng X.-F.; Meng Y.; Wang S.-Y.; Zhang C.-L. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 In order to meet special requests of optical imaging sensor in scene matching navigation system  a disc varifocal mechanism is proposed for the flight vehicles of long flying time and range. Within small space occupied  it can obtain real images with various resolutions. Moreover  using plate traveling-wave Ultrasonic Motor as its driven motor can reduce energy loss  improve control precision and ensure image obtaining being real-time and stable. Disc varifocal mechanism driven by plate traveling-wave Ultrasonic Motor is high-response  and variation in load doesn't affect its performance parameter. Therefore  applying disc varifocal mechanism in scene matching navigation system  combing software and hardware  can obviously improve the accuracy  real-time and robust of scene matching navigation system. The experiment showed that when the weight of mechanism was 1.5kg  the shortest starting was 0.6ms  and the shortest shutoff was 0.5ms. 2009 IEEE.