Results 51 to 60 of about 223 (102)

南水北调西线工程对黄河流域生态环境的影响分析

Shuitu Baochi Xuebao, 2005
黄河流域地处我国北方干旱和半干旱地区,水资源贫乏,人均占有水资源仅为全国平均水平的1/3,森林覆盖率仅为6%,是全国平均水平的50%。水土流失严重,中上游土壤侵蚀模数一般在5000t/(km2.a)以上。黄河含砂量居世界之最,多年平均含砂量达33kg/m3,由于水资源量的逐年减少和需求量的逐年增大,引起了土地沙漠化,沙尘暴以及黄河水质恶化等一系列环境问题。南水北调西线工程拟从水量充沛的长江、澜沧江、怒江流域调部分水量进入黄河,总调水量170亿m3。其中用于农、林、牧业方面的灌溉水量占总调水量的55 ...
李永乐 佘小光
doaj  

[Design and analysis of human arm pathological tremor simulation system]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
He Z, Liu H, Liu Q, Jiang Y, Zhu Z.
europepmc   +1 more source

[Machine learning-based prediction model for caries in the first molars of 9-year-old children in Suzhou]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Chen L, Wang X, Zhu K, Ren K, Wu Z.
europepmc   +1 more source

[A design and evaluation of wearable p300 brain-computer interface system based on Hololens2]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Li Q, Zhang T, Song Y, Liu Y, Sun M.
europepmc   +1 more source

[Clinical exploration and practice of a 16-step new model of comfortable supragingival scaling]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Chen Y, Li J, Wang Y, Li J, Liu J, Zhou Y, Li A.   +6 more
europepmc   +1 more source

[Advances in microchip electrophoresis for the separation and analysis of biological samples]. [PDF]

Se Pu, 2023
Huang JY, Xia L, Xiao XH, Li GK.
europepmc   +1 more source

碎石含量对三峡消落带波浪侵蚀的影响

Shuitu Baochi Xuebao
目的明确碎石含量对三峡库区消落带波浪侵蚀的影响，为消落带波浪侵蚀治理提供理论依据。方法以三峡库区紫色土坡面为研究对象，设置4个碎石含量（10%、20%、30%和40%）和3种坡度（10°、20°和30°），以裸土为对照组CK，开展室内模拟波浪冲刷试验，测定水体浑浊度值、波浪侵蚀率和孔隙水压力，阐明碎石含量对坡面波浪侵蚀的影响。结果1）水体浑浊度随波浪冲刷时间的增加呈现先上升后降至波动稳定的变化趋势，含碎石试验组水体浑浊度值相比CK组减小3.64%~25.93%；2 ...
肖海, 杨瑞东, 夏振尧, 张伦, 刘德玉, 向瑞, 刘子睿, 丁瑜, 刘琦   +8 more
doaj  

[Progress on the application of system dynamics model in the field of health management]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Wu Q, Zhou H, Zhao B, Shao J.
europepmc   +1 more source

[Exploration and Practice of Constructing a New Ecology of Experimental Stomatology Practice Teaching Driven by Digital Intelligence]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhang Y, Zheng Q, Wang Y, Zhang M, Shen J, Hao A, Han X, Ye L.   +7 more
europepmc   +1 more source

[Defect modification of calcium silicate and its application in oral bacteriostasis and tooth remineralization]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hu Y, Zhang S, Zhang J, Luo H, Li Y, Zhang J, Chen X.   +6 more
europepmc   +1 more source