Literature review and prospect on oral cognition and disease diagnosis and treatment between Han and Tang dynasties. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Gao Q +5 more
europepmc +1 more source
Research on development and application of test equipment for measuring soil erosion characteristics [PDF]
The soil erosion characteristics mainly include two indexes: critical shear stress for incipient motion of soil and soil erosion rate, which are controlling factors of breach flow and breach morphology evolution during embankment dam breaching ...
LU Hongning1 , ZHONG Qiming1, 2, 3 , SHAN Yibo1, YANG Meng1, HU Liang4
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Dianci bileiqi, 2008 分析了接地网在土壤中的腐蚀性因素,介绍了三种类型土壤的主要理化性质,即:土壤电阻率、土壤含水量、土壤pH值、可溶性盐及土壤氧化还原电位的测定。根据DIN50929评价标准,分别对三种土壤腐蚀性进行综合评价。研究了含水量对三种土壤的电阻率的影响关系,以及不同含水量对接地材料的腐蚀数据进行了拟合,确定腐蚀量与时间的关系曲线。试验结果表明:含水量大于15%时,三种土壤电阻率变化较小;小于10%时,电阻率迅速增大。
陈坤汉 +3 more
doaj
[Research progress on interference in the identification of accelerants in a fire scene]. [PDF]
Se Pu, 2022 Yin G +5 more
europepmc +1 more source
Rock strength and permeability under compression-shear coupling corresponding to different loading angles [PDF]
The Ordovician limestone aquifer is widely developed in the basement of the Carboniferous Permian coal bearing strata in North China. Coal mining is threatened by both water inrush disasters and water resource loss from the floor confined aquifer.
Dongsheng ZHANG +3 more
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Shuitu Baochi Xuebao, 2006 通过室内风洞试验研究了甘肃省河西地区在不同耕作措施条件下对土壤表层(0~5 cm)不可蚀性颗粒(粒径≥1 mm的团聚体及粗砂砾)含量的影响及不可蚀性颗粒含量与风蚀量、起动风速的相关关系。结果表明:免耕、免耕秸秆覆盖、传统耕作、秸秆翻压处理的不可蚀性颗粒(粒径≥1mm的团聚体及粗砂砾)的含量分别高于对照处理(春小麦传统耕作),说明这一地区春小麦改种冬小麦并采取保护性耕作对增加不可蚀性颗粒效果明显,以免耕秸秆覆盖(NTS)效果最好,不仅增加了不可蚀性颗粒含量,同时降低了易蚀性颗粒含量。不同耕作措施土壤表层 ...
于爱忠, 黄高宝
doaj +2 more sources
[Applications of microfluidic paper-based chips in environmental analysis and detection]. [PDF]
Se Pu, 2021 Zhang Y +10 more
europepmc +1 more source
Shuitu Baochi Xuebao, 2020 采用原状土冲刷水槽法和静水崩解法测定土壤抗冲性和抗蚀性，以云冷杉红松林（PA）和椴树红松林（TP）的林隙和郁闭林分为对照，分析了小兴安岭地区2种林型由掘根倒木形成的不同丘和坑微立地类型及其土壤性质对土壤抗冲性和抗蚀性的影响，旨在揭示它们与土壤抗侵蚀能力的关系。结果表明：在2种林型下由掘根倒木形成的丘和坑微立地上，土壤砂粒含量均较高，其抗侵蚀能力均较弱，而对照却相反；2种林型下丘和坑微立地的土壤容重均与土壤抗冲性和抗蚀性呈无显著的负相关（P>0.05），而PA对照的土壤容重与它们均呈不显著正相关（P>0 ...
兰航宇 +5 more
doaj
[Research progress on the application of derived porous carbon materials in solid-phase microextraction]. [PDF]
Se Pu, 2022 Kuang Y +4 more
europepmc +1 more source
Current situation and scientific challenge of soil and water erosion in Gully Consolidation and Highland Protection Project of DongZhi Loess Plateau [PDF]
Due to the influence of extreme rainfall and high intensity human engineering activities, the advance speed of the gully head in the Loess Tableland is intensified, which seriously threatens the economic and social development of the Loess Tableland.
Buping ZHANG +5 more
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