Results 71 to 80 of about 702,108 (119)

[Novel framework based on multi-stage random sampling and differentiable rendering for automated three-dimensional orientation estimation of skull base foramina]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li Y, Zhang H, Geng S, Tan D, Shi W, Miao Y, Jiang Z.   +6 more
europepmc   +1 more source

小流域土壤物理性状时空变异及坡面产流过程模拟

, 1999
就土壤侵蚀的实质而言，径流的产生、汇集、运动、冲刷、挟沙是侵蚀的根本前提和基本动力，而土壤物理性状才是影响土壤侵蚀的内在因素，土壤侵蚀过程是降雨作用于某种性质土壤所产生的自然结果，植被、耕作、水土保持措施是通过对土壤物理性质的影响，进一步影响土壤侵蚀过程。从这一观点出发，本文研究了黄土丘陵区大南沟小流域土壤物理性状、土壤表面特性的时空变异规律，为建立具有物理基础的流域土壤侵蚀模型作必要的准备，并对以土壤物理性状为基础，定量分析坡面径流过程的研究进行了有益的探索。    1.
张光辉
core  

[Safety of blinatumomab combined with dasatinib in the treatment of pediatric Philadelphia chromosome-positive acute lymphoblastic leukemia]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Zheng FY, Ding MM, Lu AD, Jia YP, Zeng HM, Zhang LP.   +5 more
europepmc   +1 more source

黄土坡面退水及其氮污染试验研究

, 2007
坡面退水及其污染物负荷是研究坡地水文过程和污染物迁移机理的重要组成部分.通过室内模拟降雨试验,分析了黄土坡面退水情况及降雨因素、地形地貌和农业管理措施对退水的影响,同时从降雨-径流-土壤相互作用角度探讨了退水矿质氮的浓度和负荷量.结果表明:①黄土坡面退水以地表径流为主,退水时间、退水量和退水强度远小于降雨期地表产流;②降雨强度、地表覆盖(牧草和秸秆覆盖)和地形地貌(坡度和坡长)对坡面退水影响较大,降雨期和退水期的产流强度均与雨强呈对数增加趋势;③降雨停止后,坡面径流的流速减小,与土壤相互作用时间较长 ...
肖波, 张兴昌, 李怀恩, 张亚丽
core  

降雨和坡度对坡面水流阻力规律影响研究

, 2016
为探明降雨条件下坡面薄层水流阻力特性，分析雨强对坡面流阻力的综合作用，以流体力学和水力学基本 理论为依据，通过５个坡度和８个流量、４个雨强组合条件下的模拟降雨试验，系统研究了降雨条件下坡面薄层水 流阻力规律。结果表明：相同雨强条件下，阻力系数随着坡度的增加呈现先增加后减小的趋势，随着流量、水深的 增大而逐渐减小，最终稳定在０．０２５左右；相同坡度下，坡面薄层水流的阻力系数随着降雨强度、放水流量的增大 而减小；降雨强度在一定程度上影响阻力系数与弗汝德数幂函数关系的离散性。在本试验条件下，薄层水流都处 于 ...
马小玲, 杨帆, 张宽地, 龚家国, 王俊杰   +4 more
core  

[A Review of Archaeological Studies on Dento-maxillofacial Deformities]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Luo G, Deng D, Zhou J, Zhou C.
europepmc   +1 more source

[An investigation study on the technology and training level of ski patrol]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Bai P, Huai W, Yang Z, Zhou F, Guo X, Chen Z, Guan H, Bai J.   +7 more
europepmc   +1 more source

[Adolescent depressive disorder: prevalence, risk factors, current status of diagnosis and treatment, and challenges]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Cong EZ.
europepmc   +1 more source

[Clinical analysis of endoscopic transnasal resection of skull base chondrosarcoma]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Yang X, Yan B, Wei W, Liu J, Wang Z.
europepmc   +1 more source

[Rehabilitation guidelines and specifications for traumatic spinal cord injury (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Professional Committee Of Spine And Spinal Cord Injury Rehabilitation China Association Of Rehabilitation Of Disabled Persons, Professional Committee Of Spine Chinese Association Of Rehabilitation Medicine, The Second Medical-Rehabilitation Integration Working Committee Chinese Association Of Rehabilitation Medicine, Spine And Spinal Cord Injury Repair Study Group The Third Professional Committee Of Neurorestoratology Chinese Medical Doctor Association.   +3 more
europepmc   +1 more source