Results 91 to 100 of about 745 (139)

冻结对沙丘土壤抗风蚀能力的影响

Shuitu Baochi Xuebao
目的 明确冻结作用对沙丘土壤可蚀性及抗蚀性的影响，可加深黄河乌兰布和沙漠段冬季风沙入黄过程机理的认识，并为区域入黄沙量建模与估算提供重要科学依据。方法 通过流动沙丘迎风坡表层干沙、湿沙及冻结土层的沙粒粒径筛分试验和不同水分冻结前后的土壤进行抗剪强度测试，研究沙丘土壤冻结后抗风蚀能力。结果 沙丘不同坡位沙粒在水分的黏结作用下粒径增加，粒径峰值由0.15~0.2 mm向0.3~0.355 mm集中，约35.12%细砂颗粒黏结在一起形成较大的中砂颗粒。冻结后出现极细砂，粒径峰值为0.5~0.6 mm ...
李锦荣, 韩兆恩, 唐国栋, 杨旭, 豆春花   +4 more
doaj  

[Study on occurrence of anterior ankle pain after distal tibial extra-articular fractures treated with retrograde tibial intramedullary nail]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xiong Y, Liu H, Chen T, Lin W, Zhang J, Wu J.   +5 more
europepmc   +1 more source

三峡水库消落带不同植被类型和坡位的土壤性状分异特征

Shuitu Baochi Xuebao
目的探究三峡水库消落带植被和侵蚀对土壤性状分异的复合影响。方法选取人工恢复的狗牙根和牛鞭草群落、自然恢复的混合草本群落，针对不同坡位（上坡侵蚀、中坡过渡和下坡沉积）采集土壤分层样品，测定团聚体组成、抗剪强度和土壤基本理化性质，解析土壤性状分异特征，明确关键影响因子。结果1）人工植被恢复显著改善土壤性状。狗牙根和牛鞭草的团聚体稳定性指标（MWD、GMD）、抗剪强度指标（c、φ）、土壤有机碳（SOC）、总氮（TN）、总磷（TP）均显著大于自然草本。2）侵蚀作用导致土壤性状空间分异显著。上、中坡团聚体破碎严重，
冯韫, 唐源, 饶洁, 唐强, 李进林, 韦杰, 贺秀斌   +6 more
doaj  

[Comparative study on the clinical performance of concealable traction hook spherical buccal tubes versus conventional rectangular buccal tubes]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Li S, Zhang L, Cui M, Zhong T, Chen Z, Song W, Han Y, Ji L.   +7 more
europepmc   +1 more source

[Three-dimensional human-robot mechanics modeling for dual-arm nursing-care robot transfer based on individualized musculoskeletal multibody dynamics]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yang Z, Hou F, Lin Q, Xie J, Lu H, Guo S.   +5 more
europepmc   +1 more source

[Research progress of tibial tunnel positioning techniques in posterior cruciate ligament reconstruction]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li R, Liao Y, Guo F, Chen Q, Li S, He C.
europepmc   +1 more source

[Research progress on enhanced recovery after posterior cruciate ligament reconstruction]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Shi Z, Li Y, Ruan Z, Yang H, Li K, Yuan P, Tang W, Han R.   +7 more
europepmc   +1 more source

[Clinical symptoms and cone beam computed tomography imaging analysis of patients with temporomandibular joint osteoarthritis with chewing side preference before and after treatment of stabilization splint]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Li X, Wang J, Xu L, Xu X, Li H, Hu M, Liu H, Jiang H.   +7 more
europepmc   +1 more source

[Impact of lamina formation range on lumbar biomechanics in unilateral biportal endoscopic spine surgery: a finite element analysis for surgical optimization]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ji S, Ma B, Zou Y, Zhang M, Ren M, Li H, Duan K, Xu C, Zhang C, Ye Y, Zhou P.   +10 more
europepmc   +1 more source

[Finite element analysis of tibial and femoral resection configurations on varus alignment in total knee arthroplasty]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liang C, Yin Y, Zhang Y, Zhang X, Chen G, Duan K, Li Z, Lu X, Jin Z.   +8 more
europepmc   +1 more source