Results 61 to 70 of about 149 (109)

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  

Correction of presbyopia. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2022
Song S, Wen D, Yin Y, Qian F, Xu H, Xia X.   +5 more
europepmc   +1 more source

Expert consensus on clinical management for early childhood caries. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2022
Zhang Q, Wang J, Xia B, Zhao W, Chen X, Jiang B, Huang Y, Wu L, Yuan G, Zou J.   +9 more
europepmc   +1 more source

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  

[Effect of TVT-Abbrevo in the treatment of female stress urinary incontinence]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Guo R, Zhang L, Wang Y, Wang X, Wang X, Nian S, Zhang L, Xiao B, Lu Y.   +8 more
europepmc   +1 more source

[The fungal abscess in septal: one case report]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021
Wang J, Liu Y.
europepmc   +1 more source

无人机监测东北黑土区切沟形态的最优参数配置

Shuitu Baochi Xuebao
[目的] 东北黑土区切沟侵蚀不断蚕食耕地资源,威胁我国粮食安全。无人机技术的发展为沟蚀监测提供有效手段,但获取数据分辨率越高耗时越长,如何配置无人机参数,使其既能满足精度要求又能提高航摄效率是当前需要解决的问题。[方法] 选择东北漫川漫岗区的鹤北流域为研究区,以实地断面测量数据为验证值,通过评估不同分辨率、不同飞行航向及不同无人机数据提取的切沟参数精度,探究不同无人机参数配置的适用条件。[结果] (1)与实测值相比,分辨率1 cm数据提取的切沟参数精度最高 ...
唐杰, 谢云, 刘川, 张岩
doaj  

[Clinical observation of free palmaris longus tendon graft reconstruction in treatment of gouty tophus erosion lesions in flexor tendon of wrist and hand]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang G, Lu C, Qu Z, Zhang Y, Bi B, Gao F, Zhang Z, Pan Y, Zhu E, Huang H.   +9 more
europepmc   +1 more source

[Resin short post retention for reattachment of a fractured crown in a young permanent tooth with complicated crown-root fracture and root fracture: a case report]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wang Y, Chang H, Zhang B, Liao Z.
europepmc   +1 more source

[Study on influence of tooth-supported osteotomy guide plates on the accuracy of mandibular segmental resection and its surgical outcome]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ma H, Liang K, Qiu R, Liu L.
europepmc   +1 more source