Results 41 to 50 of about 892 (93)

滇中高原山地人工群落径流规律的研究

Shuitu Baochi Xuebao, 2001
基于连续 3年的观测 ,研究了华山松人工群落的径流特征 ,分析结果表明 :区域降水量的季节分配不均 ,湿季 (6～ 10月 )降水量占全年的 80 % ,降水量主要由大于 10 mm以上的降雨带来 ,且降雨强度大部分小于 5 .0mm/ h;径流量月变化趋势与降雨量相似 ,具有较好的相关性 ;一次性降雨对地表径流的影响显著 (R =0 .91) ,一次性“最大可能”地表径流产流的降雨临界值为 2 2 .3mm。地表径流与地下径流分别占总径流量的 0 .5 8%和99.42 ...
方向京 孟广涛 等
doaj  

人工降雨对稻田中氮磷动态变化的影响研究

Shuitu Baochi Xuebao, 2011
在水稻黄熟期,通过对微区模拟稻田进行人工降雨试验,分析了60,48,17.4 mm/h 3个雨强处理(分别表示为y-b、y-m、y-s)条件下,不同滞水时间的田面水中氮磷的动态特征以及总氮、总磷的流失潜能,研究了不同雨强和滞水时间对稻田氮磷的减排效能。结果表明:(1)在3个雨强处理下,田面水中TN浓度在人工降雨后1 h为最高,y-s的田面水中TN浓度下降迅速;y-m和y-b的田面水积聚量较大,但在第5 d时其TN浓度也迅速下降到最低值。田面水中NH+4-N浓度整体水平较低,NO-3-N浓度总体水平较高 ...
冯国禄, 龚军慧
doaj  

Public Emotional and Thematic Responses to Major Emergencies on Social Media, 2024-2025: Cross-Sectional Convergent Mixed Methods Study. [PDF]

J Med Internet Res
Guo X, Fan Y, Guo Y.
europepmc   +1 more source

[Impact of tibial tunnel position in artificial posterior cruciate ligament reconstruction on postoperative knee function and stability]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao Y, Wang C.
europepmc   +1 more source

黄土丘陵区人工移植生物结皮集雨面的集雨效率及其抗侵蚀破损能力

Shuitu Baochi Xuebao
[目的] 为探讨黄土丘陵区不同类型人工生物结皮集雨面的集雨效果及抗侵蚀破损能力。[方法] 以人工移植培养的藻类和藓类生物结皮为研究对象,以裸土为对照,分别对其进行野外模拟降雨和抗侵蚀试验(坡面冲刷、土壤静水崩解和单雨滴溅蚀试验),分析不同类型集雨面的集雨效率与土壤抗冲系数、土壤崩解速率和溅蚀量等抗侵蚀能力指标的差异。[结果] (1)生物结皮集雨面显著提高集雨效率。当雨强为100 mm/h时,相较于裸土,生物结皮集雨面的集雨效率显著提高33.3%(F=300.12 ...
陈钧儒, 江子昊, 肖波, 窦韦强
doaj  

[Aging-Associated Oral Microbiota Dysbiosis and Hypofunction: Their Role in Alzheimer's Disease Pathogenesis]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Li Y, Chen Y, Chen S, Huang X.
europepmc   +1 more source

Mendelian randomization studies on cardiometabolic factors and intracranial aneurysms: A systematic literature analysis. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Wang Y, Liu J, Cao F, Guo Y, Yan J.
europepmc   +1 more source

[Anti-inflammatory effects of cell membrane vesicle-mediated delivery of small interfering RNA targeting tumor necrosis factor-α on dental pulp stem cells]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Gao R, Ma T, Wang R, Yin Y, Li R, Wang D, Xia B.   +6 more
europepmc   +1 more source

[Application of large language models in health education for patients with pediatric cataract]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Guo Y, Zhang Y, Xu Y, Wei W, Meng K, Chen Y, Chen Z.   +6 more
europepmc   +1 more source

[Case of tooth autotransplantation with robotic surgery assistance]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Liu Y, Song J, Chen X, Zhang C, Chen S, Zhang J, Gu Z.   +6 more
europepmc   +1 more source