Results 71 to 80 of about 2,027 (109)

大巴山泥石流侵蚀作用及防治对策研究

open access: yesShuitu Baochi Xuebao, 1993
通过对大巴山泥石流形成和发育过程的研究,从侵蚀机制的角度,将其分为坡面侵蚀,沟谷侵蚀,复合侵蚀三种基本的侵蚀类型,并进一步分析了不同影响因素在各类泥石流发育中所起的作用,认为:坡面侵蚀型泥石流的发育与植被关系最密切;沟谷侵蚀型泥石流的发育对暴雨的依赖性最大;复合侵蚀型泥石流的发育与沟岸的不稳定有很大关系。最后,针对性地提出了大巴山区各类泥石流的防治重点。
doaj  

[Application value of anti-carbamylated protein antibody in the diagnosis of rheumatoid arthritis]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Li Z   +7 more
europepmc   +1 more source

冻融作用对黑土坡面融雪、风力和降雨侵蚀的影响研究

open access: yesShuitu Baochi Xuebao
[目的] 研究冻融作用对东北黑土区坡面土壤侵蚀的影响,可加深对黑土坡面侵蚀过程机理的认识,并为区域侵蚀治理提供重要科学依据。[方法] 以东北黑土区单一侵蚀营力驱动的融雪、风力和降雨侵蚀为对照,通过设计冻融-融雪、冻融-风力、冻融-降雨双侵蚀营力叠加的模拟试验,分析冻融作用对坡面融雪、风力和降雨侵蚀的影响。试验处理包括1次冻融作用、2个融雪径流量(1,2 L/min)、1个风速(12 m/s),1个降雨强度(100 mm/h)和1个坡度(3°)。[结果] (1)冻融作用显著增加坡面融雪、风力和降雨侵蚀量 ...
赵娅君   +7 more
doaj  

Effect of miR-124a on collagen-induced arthritis in mice and the underlying mechanisms. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban, 2022
Ge Y, Yang B, Xu S, Xie X, Li F, Tian J.
europepmc   +1 more source

水力侵蚀对崩岗形成的驱动机制研究进展及防控启示

open access: yesShuitu Baochi Xuebao
目的崩岗侵蚀通常遵循“坡面侵蚀-切沟侵蚀-崩岗雏形-大型崩岗”的阶段性演变规律。研究旨在厘清水力侵蚀在崩岗形成关键阶段的驱动作用及核心路径,为区域侵蚀防控提供科学依据。方法通过系统梳理国内外相关研究,基于坡面侵蚀发展链条,归纳构建崩岗形成阶段的机制框架。结果在崩岗形成阶段,水力侵蚀起主导作用,显著增大沟壁高差,削弱土体稳定性并诱发重力侵蚀;重力侵蚀则在发展阶段逐渐成为驱动崩岗快速扩张的主导动力,二者通过“掏蚀-崩塌-再侵蚀”的正反馈作用维持崩岗的高强度侵蚀状态。此外,植被破坏 ...
姚眸   +4 more
doaj  

[Clinical characteristics of congenital and acquired middle ear cholesteatoma in children]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Shao J   +9 more
europepmc   +1 more source

[A case report of right sinonasal carcinosarcoma and literature review]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Leng H, Sun J, Wang A, Wang Y.
europepmc   +1 more source

[Clinical characteristics and surgical outcomes of the endolymphatic sac tumor]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
He L   +5 more
europepmc   +1 more source

[Analysis of hearing effects of three ossicular reconstruction methods in 123 cases of atticotomy surgery]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Qiao Y   +5 more
europepmc   +1 more source

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