Results 101 to 110 of about 1,095 (143)

[Association of public health and social measures with the effectiveness of COVID-19 epidemic control]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Zong H, Li D, Dai Y, Zhou J, Huang H, Hu G.   +5 more
europepmc   +1 more source

不同尺度条件下的土壤侵蚀实验监测及模型研究

土壤侵蚀的实验和监测是获取水土流失资料的重要手段,土壤侵蚀模型研究是水土保持规划、管理的重要内容。本文对点、小区、田间和坡面、流域及区域尺度条件下的土壤侵蚀的实验和监测研究进行了综述,分析了当前国际上实验研究和监测研究的侧重点及其不足;并对当前国际上土壤侵蚀模型的总体发展趋势进行了评述,特别分析了这些模型在全球气候变化背景下的作用;最后对当前土壤侵蚀 ...
唐政洪, 朱远达, 蔡强国, 许峰
core  

降雨、汇流和坡度对黑土浅沟坡面侵蚀影响的试验研究

Shuitu Baochi Xuebao
[目的] 为研究降雨、汇流和坡度对浅沟侵蚀的影响,实施精确的水土保持措施。[方法] 通过室内模拟降雨和汇流试验,设计2个降雨强度(50,100 mm/h)和2个坡度(3°,7°),并在4种降雨强度和坡度组合下设置5个依次增加的汇流强度(15,30,45,60,75 L/min),分析降雨、汇流和坡度及其交互作用对浅沟坡面侵蚀的影响,明确浅沟侵蚀对坡面侵蚀的贡献。[结果] (1)坡度和汇流强度对浅沟坡面侵蚀的影响均大于降雨强度。当降雨强度由50 mm/h增加到100 mm/h时,3°和7 ...
耿华杰, 郑粉莉, 赵录友, 王伦, 赵婷, 秦琪珊, 安小兵   +6 more
doaj  

[Clinical research and medical ethics in the era of artificial intelligence]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Song X, Gao N, Huang KQ, Chen XY, Deng SJ, Xie C, Peng L.   +6 more
europepmc   +1 more source

[Expert consensus on monoclonal antibody immunoprophylaxis against respiratory syncytial virus in infants and young children in tropical and subtropical regions of China]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Subspecialty Group of Neonatology, Society of Pediatrics, Chinese Medical Association, Guangdong Medical Association, Editorial Board of Chinese Journal of Contemporary Pediatrics.   +4 more
europepmc   +1 more source

Applications of image methods for the measurement of granular flows

[[abstract]]顆粒材料的流動包含流體與固體的特性。為了充分瞭解顆粒流的行為，本研究使用粒子追蹤測速法量測實驗中顆粒的速度。 為了提高粒子追蹤測速法的準確度，本研究分析各實驗照片之特性來調整粒子追蹤測速法的參數以及比對方法。主要採取的步驟為，校正所拍攝到之圖片，並且使用影像方法強化顆粒中心與背景之差異。利用此差異取得顆粒中心後，藉由顆粒的幾何形狀與排列方式排除非觀測平面之顆粒。顆粒配對的部份則是使用星形比對為主要概念，本研究透過改變配對星形的分支數目與計算方式，來達到精確的星形比對效果 ...
Li, Chien-Chih, 李健誌
core  

[Study on simulated airflow dynamics of children with obstructive sleep apnea treated by different surgical methods]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Guo W, Lei Q.
europepmc   +1 more source

[Optimized extraction of active components of <i>Paeonia lactiflora</i> and their antioxidant, anti-inflammatory and pigmentation-reducing effects for skin whitening]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Xu Q, Li W, Zhang X, Chen Y, Jiang Z, Li G, Yan M.   +6 more
europepmc   +1 more source

[Archeological Research on Third Molar Degeneration]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Huang H, Zhou J, Zhou X.
europepmc   +1 more source

[Analysis of setup errors and their correlation with clinical factors in image-guided radiotherapy for prostate cancer using different immobilization devices]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Guo X, Liu Y, Xiong Y, Liu B, Song T, Li Y.   +5 more
europepmc   +1 more source