Results 51 to 60 of about 488 (107)

花岗岩红壤坡面沟头高度对沟床跌穴发育过程的影响

Shuitu Baochi Xuebao
[目的] 为明确花岗岩红壤坡面沟头溯源侵蚀的关键过程及形成机制。[方法] 通过设定5个沟头高度(25,50,75,100,125 cm)研究花岗岩红壤坡面沟床跌穴发育过程。[结果] (1)随沟头高度增加,沟床径流雷诺数、径流剪切力、径流功率和射流参数(触底流速、射流剪切应力、瞬时动能、跌穴径流能耗)均表现为增加趋势。(2)红土层沟床形成“V”形跌穴,随流量增加跌穴形态变化增大,但只形成面积较小的跌穴。而砂土层在冲刷过程中,沟床跌穴发育较为明显,当流量增大到120 L/min后,沟床破碎化程度增加 ...
王建羽, 林哲, 廖达兰, 段晓倩, 邓羽松   +4 more
doaj  

[Diabetic Charcot neuroarthropathy initially misdiagnosed as rheumatoid arthritis and gout: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Gu J, Li X, Zhao J, Mu R.
europepmc   +1 more source

水力条件对不同地表粗糙度土壤分离能力的影响

Shuitu Baochi Xuebao
目的水力条件是影响土壤侵蚀的关键因素。然而，较少有研究关注水力条件对不同地表粗糙度土壤分离能力的影响。分析不同水力条件下地表粗糙度对土壤分离能力的影响，可为土壤侵蚀过程模型的构建提供理论依据。方法采用近景摄影测量法量化地表粗糙度，结合冲刷试验，量化分析9个水力剪切力（1.61~7.04 Pa）条件下粗糙处理与对照处理的土壤分离能力，并建立基于水力参数的土壤分离能力预测模型。结果1）粗糙和对照处理的径流含沙总量均随水力剪切力的增大而增加，当水力剪切力较小时（1.64~4.69 Pa ...
资如毅, 方发永, 陈廷生, 毛天旭, 韩珍, 赵龙山   +5 more
doaj  

[Influence of two methods of smear layer removal on the surface properties of dentin]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhu L, Tang L, Li B, Wang M, Liu Y.
europepmc   +1 more source

[Rheumatoid arthritis complicated with necrotizing fasciitis: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Lyu X, Yu X, Zhang W, Liu C, Lin H, Zeng S, Huang H, Wu Y.   +7 more
europepmc   +1 more source

[Clinical efficacy of in-situ crown reattachment technique combined with pulpotomy in the treatment of complica-ted crown-root fractures of young permanent anterior teeth]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Su X, Guo Q, Ren M, Liu F.
europepmc   +1 more source

Progress in research and development of biodegradable metallic vascular stents. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Yang Y, Zhang Z, Wang J, Fu K, Li D, He H, Shu C.   +6 more
europepmc   +1 more source

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

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

黄土高原生物结皮混合群落对坡面流流体阻力特征的影响

Shuitu Baochi Xuebao
目的为明确生物结皮影响坡面流阻力作用机制，研究不同生物结皮类型组成的混合群落对坡面流颗粒阻力（fg）和形态阻力（ff）的影响。方法采集3种（以藻为主、藻藓比例相当、以藓为主）混合生物结皮原状土壤样品84个，设置7组坡度和流量组合，采用变坡水槽冲刷试验，系统研究不同水动力条件下坡面流阻力特征对生物结皮响应。结果1）坡面流流经生物结皮覆盖区流速减少8.5%~57.3%，水深增加5.4%~70.6%；生物结皮混合群落缓流效率随藓类结皮占比的增加显著增强，以藓为主混合生物结皮（T3 ...
白洁, 王兵, 杨艳芬, 李成芳, 王静, 马金龙   +5 more
doaj  

[Performance of hyaluronic acid biogel and its effect on healing of infected burn wounds in mice]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Shi MS, Liang XY, Zhang R, Wang YY, Fang LH, Li Y, Xu FJ.   +6 more
europepmc   +1 more source