Results 91 to 100 of about 279 (112)

[A study on the predictive model of porous hyperelastic properties of human alveolar bone based on computed tomography imaging]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Wu B   +7 more
europepmc   +1 more source

[Processing of impedance cardiogram differential for non-invasive cardiac function detection]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2019
Zhang Y, Ji Z, Tan X, Shen Z, Xu L.
europepmc   +1 more source

基于无人机的黄土丘陵沟壑区极端降雨条件下小流域道路切沟侵蚀模拟和特征

open access: yesShuitu Baochi Xuebao
目的基于无人机航拍影像构建可靠的道路切沟体积估算模型,实现对黄土高原道路切沟体积快速、准确的监测与评估。方法以陕西省志丹县旦八镇2个典型小流域2024年8月8日极端降雨切沟调查数据,建立不同类型道路切沟形态参数与体积间的经验模型,进一步估算次暴雨道路切沟侵蚀特征。结果1)切沟长度和表面积与切沟体积间呈显著幂函数关系,但表面积更能准确估算切沟体积,分类(土路、石子路和公路)构建表面积与切沟体积间经验模型显著提升切沟侵蚀估算精度。2)监测小流域石子路切沟数量最多(67%),侵蚀量(638.60 t ...
张紫薇   +3 more
doaj  

[Penis growth and development in children and adolescents: a study based on GAMLSS]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi, 2017
Yi QJ, Zeng Y, Zeng Q, Wang YN, Xiong F.
europepmc   +1 more source

冻融作用下高寒土细沟侵蚀过程与输沙能力经验模型

open access: yesShuitu Baochi Xuebao
目的为探讨冻融作用对细沟侵蚀的影响机制。方法通过室内沟槽冲刷试验,分析不同流量(q)与坡度(S)组合下细沟输沙特征,同时构建输沙能力因子模型。结果1)冻融作用使细沟输沙能力最高可提升34.34%,且影响程度具有明显的坡度和流量依赖性;使临界坡长由未冻融前6.8~8.1 m缩短至5.3~6.4 m。2)冻融前后输沙能力均与流量保持线性关系(Tc=Aq),但与坡度关系发生改变,冻融前随坡度呈指数增长(Tc=-ae(-S/b)+c),冻融后转为幂函数增长(Tc=dSf);建立未冻融输沙能力因子模型为Tc=-0.
田方霄   +4 more
doaj  

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