Results 101 to 110 of about 76,202 (153)

坡度对黄土坡面养分流失的影响实验研究

, 2007
坡度是土壤养分流失的重要因素,通过室内人工降雨模拟试验,研究不同坡度土壤侵蚀和养分流失的过程与机制。研究结果表明:土壤中养分的流失量随坡度的增大而增大,但在20°附近时存在转折点,25°时养分流失量反而减小。同时利用两种类型描述径流养分浓度模型对实测资料进行分析,结果显示与指数函数模型相比较,采用幂函数模型能够较好地模拟黄土坡面非饱和条件下径流溶质浓度变化过程,同时幂函数模型也能够较好地描述径流中钾离子和溴离子的质量变化过程 ...
王全九, 樊军, 孔刚
core  

[Adolescent depressive disorder: prevalence, risk factors, current status of diagnosis and treatment, and challenges]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Cong EZ.
europepmc   +1 more source

[Aerobic exercise regulates macrophage polarization and improves insulin resistance in mice: the mediating role of miR-221-3p]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Li N, Zhang L, Guo Q, Zhou Y, Liu C.
europepmc   +1 more source

黄土质地对坡面侵蚀的影响

, 2016
采用室内人工模拟降雨试验，研究了黄土质地对坡面侵蚀的影响，并探讨了降雨、地形（坡度和坡长） 及黄土土质对坡面侵蚀的综合作用。试验设计包括３种质地黄土（黄绵土、黑垆土和塿土）、４个坡度（１０°， １５°，２０°和２５°）、２个坡长（５ｍ和１０ｍ）和２个总降雨量相同的降雨强度（９０，１２０ｍｍ／ｈ）。结果表明：在相 同降雨条件下，塿土降雨过程中入渗缓慢，产流时间快于黑垆土与黄绵土，塿土坡面的径流总量高于黑垆 土和黄绵土坡面。坡度对单宽产流率无影响 ...
孙莉英, 蔡强国, 盛贺伟
core  

[Epidemiological characteristics of intussusception in children aged 0-3 years in Jiangsu Province from 2018 to 2023]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Wang Y, Gao X, Liu Z, Zhan S.
europepmc   +1 more source

The landslide's conceptualizing economic decline and its framing effect: Mandarin evidence. [PDF]

Front Psychol, 2023
Zhang Y, Yang W.
europepmc   +1 more source

[Application of a standardized rehabilitation process in correction of adult clubfoot with Ilizarov technique]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Liu L, Qin S, Shi L.
europepmc   +1 more source

[Rehabilitation guidelines and specifications for traumatic spinal cord injury (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Professional Committee Of Spine And Spinal Cord Injury Rehabilitation China Association Of Rehabilitation Of Disabled Persons, Professional Committee Of Spine Chinese Association Of Rehabilitation Medicine, The Second Medical-Rehabilitation Integration Working Committee Chinese Association Of Rehabilitation Medicine, Spine And Spinal Cord Injury Repair Study Group The Third Professional Committee Of Neurorestoratology Chinese Medical Doctor Association.   +3 more
europepmc   +1 more source

我国南方丘陵区土壤耕作侵蚀的定量研究

Shuitu Baochi Xuebao, 2001
通过采用示踪法对四川丘陵区坡耕地的耕作试验研究 ,获得了土壤耕作位移和土壤耕作侵蚀的直接证据 ,确定了耕作侵蚀是四川丘陵区土壤流失的原因之一。试验结果指出 ,四川丘陵区单次耕作的土壤位移量为 43.70～ 6 4.47kg/ m;平均土壤耕作侵蚀速率为 6 5 .0 5～ 97.0 5 t/ hm2 .a。土壤耕作位移受地面坡度的影响十分明显 ,平均位移距离与坡度间呈显著正相关关系。耕作侵蚀速率主要取决于坡体长度 ,只有在坡体长度相同的条件下 ...
doaj  

[Analysis and Projection of the Burden of Chronic Respiratory Diseases Attributable to Smoking in China, 1990-2021]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Xie X, Lin D, Li M, Ye X, Fang J, Zhang X, Xue A.   +6 more
europepmc   +1 more source