Results 51 to 60 of about 64,134 (65)
, 2013 为了解决尼龙阻沙网在沙埋情况下的防风阻沙,采用不同叠加模式的尼龙阻沙网进行防护.设置3种高立式沙障叠加模式方案,叠加位置分别位于迎风坡、阻沙网、背风坡,迎风坡与背风坡叠加的尼龙阻沙网与原有阻沙障距离和长度均相同,叠加的阻沙网高度为沙埋原有阻沙障的一半,且叠加的尼龙阻沙网需高出原有尼龙阻沙障.选择高1.2m的沙埋阻沙障进行叠加,迎风与背风坡叠加的位置距原有阻沙障水平距离约45 cm.通过野外观测发现:①不同叠加模式的高立式沙障阻沙量不同,即阻沙网＞迎风坡＞背风坡 ...
雷加强 +7 more
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[Overview and prospects of endoscopic skull base surgery]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiWang D, Zhang H.
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[Body mass index and all-cause mortality in Asian adults: a meta-analysis]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue Ban, 2015 Wang YQ, Ye D, Li YJ, Chen K.
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[Clinical characteristics of overlapping syndromes of low muscle mass in patients with rheumatoid arthritis and their impact on physical function]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanJia P +7 more
europepmc +1 more source
[Clinical Development of Immune Checkpoint Inhibitors in Patients with Small Cell Lung Cancer]. [PDF]
Zhongguo Fei Ai Za Zhi, 2017 Zhang S, Liu J, Cheng Y.
europepmc +1 more source
[Thoughts and Prospects on Precision Control and Intelligent Positioning Robotic Systems Applied in Nasojejunal Feeding Tube Placement]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanQiu Y +9 more
europepmc +1 more source
[Advances in Radiotherapy for Extensive-stage Small Cell Lung Cancer in the Era of Immunotherapy]. [PDF]
Zhongguo Fei Ai Za ZhiChen T +5 more
europepmc +1 more source
[Transoral robotic surgery in pharyngolaryngeal surgery]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiHu X, Qin Y.
europepmc +1 more source
, 2014 滑坡被认为是全球第三大自然灾害,严重影响着我国山区、丘陵地区的社会经济发展。对滑坡灾害风险进行评估并研究其空间分布格局,既是转变我国防灾减灾理念、有效降低滑坡灾害损失的迫切要求,也可以填补当前滑坡研究的不足。通过查阅全国2000多个县市的地方志记录,结合地球系统科学共享数据,根据自然灾害风险研究的相关理论研究成果,采用国际减灾战略组织的风险评估模型,对我国县域单元滑坡灾害的人员要素和社会经济损失风险状况进行了量化评估研究,并通过GIS制图分析了其空间分布格局。结果显示,西南地区大部、西北地区东部 ...
戴尔阜 +3 more
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, 2001 从数值算法的耗散和色散特征的时空全离散Fourier分析出发，通过直接求解二维非定常可压Navier-Stokes方程，将发展的5阶迎风紧致差分格式用于无约束可压平面受迫剪切层中基频涡卷空间演化过程的数值模拟。采用被动守恒标量等方法显示了基频涡卷的饱和、一次对并、二次对并等现象，据此探讨了入口来流亚谐扰动引起的初值效应问题 ...
王强, 马延文, 傅德薰
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