Although scientists have performed many studies in the Taklimakan Desert, few of them have reported the blown sand motion along the southern edge of the Taklimakan Desert Highway, which differs significantly from the ...Although scientists have performed many studies in the Taklimakan Desert, few of them have reported the blown sand motion along the southern edge of the Taklimakan Desert Highway, which differs significantly from the northern region in terms of aeolian sand geomorphology and formation environment. Based on the field ob- servation data of airflow and aeolian sand transport, continuous monitoring data of erosional and depositional processes between 14 April 2009 and 9 April 2011 and data of surface sand grains from the classical section along the southern edge of the Taklimakan Desert Highway, this paper reported the blown sand motion within the sand-control system of the highway. The main results are as follows： 1） The existing sand-control system is highly effective in preventing and controlling desertification. Wind velocities within the sand-control system were ap- proximately 33%-100% of those for the same height above the mobile sand surface. Aeolian sand fluxes were approximately 0-31.21% of those of the mobile sand surface. Sand grains inside the system, with a mean diameter of 2.89 q）, were finer than those （2.15 q）） outside the system. In addition, wind velocities basically followed a loga- rithmic law, but the airflow along the classical section was mainly determined by topography and vegetation. 2） There were obvious erosional and depositional phenomena above the surface within the sand-control system, and these phenomena have very consistent patterns for all observation points in the two observed years. The total thicknesses of erosion and deposition ranged from 0.30 to 14.60 cm, with a mean value of 3.67 cm. In contrast, the deposition thicknesses were 1.90-22.10 cm, with a mean value of 7.59 cm, and the erosion thicknesses were 3.51-15.10 cm, with a mean value of 8.75 cm. The results will aid our understanding of blown sand within the sand-control system and provide a strong foundation for optimizing the sand-control system.展开更多
目的研究并实现一套云端成人发育性髋关节发育不良(Adult Developmental Dysplasia of the Hip,ADDH)影像协同标注系统,建立ADDH影像标准化标注数据库。方法利用异构平台数据共享与跨区域协同等技术,采用B/S云端架构,根据ADDH临床诊断...目的研究并实现一套云端成人发育性髋关节发育不良(Adult Developmental Dysplasia of the Hip,ADDH)影像协同标注系统,建立ADDH影像标准化标注数据库。方法利用异构平台数据共享与跨区域协同等技术,采用B/S云端架构,根据ADDH临床诊断工作需求,研究服务于医学影像数据共享及跨区域协同标注模式的ADDH影像标注系统。结果实现了高可用、高并发,且支持不同医疗机构间影像与临床信息的共享及调阅,满足多人同时在线协同标注及多盲审核的ADDH影像标注系统。结论该系统填补了目前ADDH影像协同标注与管理系统的空白,为临床诊断带来便利的同时,将临床影像数据赋能为可用于人工智能产品开发的数据资产,具有较高的实用价值和应用前景。展开更多
基金supported by the National Natural Science Foundation of China (41271020, 41330746)CERS-China Equipment and Education Resources System (CERS-1-109)
文摘Although scientists have performed many studies in the Taklimakan Desert, few of them have reported the blown sand motion along the southern edge of the Taklimakan Desert Highway, which differs significantly from the northern region in terms of aeolian sand geomorphology and formation environment. Based on the field ob- servation data of airflow and aeolian sand transport, continuous monitoring data of erosional and depositional processes between 14 April 2009 and 9 April 2011 and data of surface sand grains from the classical section along the southern edge of the Taklimakan Desert Highway, this paper reported the blown sand motion within the sand-control system of the highway. The main results are as follows： 1） The existing sand-control system is highly effective in preventing and controlling desertification. Wind velocities within the sand-control system were ap- proximately 33%-100% of those for the same height above the mobile sand surface. Aeolian sand fluxes were approximately 0-31.21% of those of the mobile sand surface. Sand grains inside the system, with a mean diameter of 2.89 q）, were finer than those （2.15 q）） outside the system. In addition, wind velocities basically followed a loga- rithmic law, but the airflow along the classical section was mainly determined by topography and vegetation. 2） There were obvious erosional and depositional phenomena above the surface within the sand-control system, and these phenomena have very consistent patterns for all observation points in the two observed years. The total thicknesses of erosion and deposition ranged from 0.30 to 14.60 cm, with a mean value of 3.67 cm. In contrast, the deposition thicknesses were 1.90-22.10 cm, with a mean value of 7.59 cm, and the erosion thicknesses were 3.51-15.10 cm, with a mean value of 8.75 cm. The results will aid our understanding of blown sand within the sand-control system and provide a strong foundation for optimizing the sand-control system.
文摘目的研究并实现一套云端成人发育性髋关节发育不良(Adult Developmental Dysplasia of the Hip,ADDH)影像协同标注系统,建立ADDH影像标准化标注数据库。方法利用异构平台数据共享与跨区域协同等技术,采用B/S云端架构,根据ADDH临床诊断工作需求,研究服务于医学影像数据共享及跨区域协同标注模式的ADDH影像标注系统。结果实现了高可用、高并发,且支持不同医疗机构间影像与临床信息的共享及调阅,满足多人同时在线协同标注及多盲审核的ADDH影像标注系统。结论该系统填补了目前ADDH影像协同标注与管理系统的空白,为临床诊断带来便利的同时,将临床影像数据赋能为可用于人工智能产品开发的数据资产,具有较高的实用价值和应用前景。
