Results 101 to 110 of about 552 (150)

Soil anti-scouribility and its related physical properties on abandoned

, 2013
为了评价农地撂荒对土壤抗侵蚀性的影响,该文以黄土丘陵区自然撂荒地为研究对象,应用时空互代法,通过原状土冲刷试验对不同撂荒阶段(0～43a)的坡地土壤抗冲性进行了研究。结果表明:与对照(阶段Ⅰ)相比,随着撂荒年限的增加,表层(0～15cm)和中层(>15～30cm)土壤容重显著降低,而下层(>30～50cm)土壤容重变化较小(约下降0.5%)。土壤团聚体和抗剪强度(黏聚力C和内摩察角φ)在3个土层中均呈显著增加趋势,而土壤崩解速率在3个土层中均呈下降趋势,与表层相比 ...
刘国彬, 孙会, 张正, 李强, 许明祥   +4 more
core  

[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

Prediction model of dental caries in 12-year-old children in Sichuan Province based on machine learning. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2023
Yan X, Sun T, Lu Y, Tan X, Wang Z, Li M.
europepmc   +1 more source

Experimental Study of Soil and Water Loss Processes on Waste Soil and Residue in Project Construction

, 2009
弃土弃渣是工程建设产生的最主要地面组成物质之一。采用野外放水冲刷试验方法,对黄河班多水电站工程区弃土弃渣水土流失过程进行了研究。(1)不同供水流量下,产流率随供水过程的动态变化整体呈增长趋势,可用幂函数方程描述,开始产流后的5 min内产流过程的变化幅度较大,随后较为平缓,并趋于基本稳定;(2)不同供水流量下,产沙率随供水历时的增长而减少,可用对数相关方程描述,小流量下变化过程波动较小,大流量下变化幅度较大;(3)不同供水流量下,含沙量随着供水历时的增长而减少,可用对数相关方程描述 ...
刘俊娥, 寇晓梅, 张乃畅, 王占礼, 袁殷, 谭贞学, 马春艳   +6 more
core  

[Research on hybrid brain-computer interface based on imperceptible visual and auditory stimulation responses]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Pang Z, Wang Y, Dong Q, Cheng Z, Li Z, Zhang R, Cui H, Chen X.   +7 more
europepmc   +1 more source

[Initial exploration of non-invasive diagnosis of eosinophilic chronic rhinosinusitis with nasal polyps via nasal brush sampling]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Chen Z, Guo J, Chen W, Meng Y, Li D, Zhou J, Wang Z.   +6 more
europepmc   +1 more source

[Research advances in three-dimensional bioprinted wound dressings]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Shi C, Lei C, He L, Liao D.
europepmc   +1 more source

[Performance evaluation of a wearable steady-state visual evoked potential based brain-computer interface in real-life scenario]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li X, Cao X, Wang J, Zhu W, Huang Y, Wan F, Hu Y.   +6 more
europepmc   +1 more source

[Design of flexible wearable sensing systems]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Chen H, Wang Z, Meng L, Xu K, Wang Z, Chen C, Chen W.   +6 more
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