Results 51 to 60 of about 1,453 (122)
Research on risk early warning for rainfall-induced shallow landslides in Guangdong Province based on a dynamic slope instability model [PDF]
In light of the accuracy and model construction challenges in county-level meteorological risk early warning for geo-hazards, and considering the prominent characteristics that these geo-hazards mainly occur on the shallow surface of residual slopes, the
Pingxin WEI +5 more
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Shuitu Baochi Xuebao目的为探讨生态护坡材料的长期服役耐久性。方法通过干湿循环条件下的力学试验和渗透试验，研究固化黄土宏观性能的演化规律，利用扫描电镜和图像处理技术，分析干湿循环对微结构形态的损伤规律，探讨生物胶改善黄土宏观性能干湿循环耐久性的微观机理，并基于宏观性能指标和微结构参数建立宏-微观演化特征函数，描述干湿循环条件下宏观性能与微观结构间的数值响应关系。结果生物胶抑制固化黄土力学性质劣化，抑制效果与生物胶掺量呈正相关，生物胶增大固化黄土的渗透性能变化，变化幅度与掺量呈负相关；干湿循环造成黄土胶结作用失效，颗粒损伤 ...
焦远帆 +6 more
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Gaoya dianqi, 1973 本文对550千伏和765千伏超高压SF6断路器作了概括的介绍。由于采用了新设计和对现有产品结构进行了改进,因而减少了550千伏断路器的单元数,并创制出三个单元数765千伏断路器。新断路器的最小运行气体压力从原来的30磅/吋2（2公斤/厘米2）增加到45磅/吋2（3公斤/厘米2）,绝缘强度亦随之提高。为了控制湿度,在气体循环系统中加入了很多干燥剂,并且特别注意断路器的装配和加工。操作过电压,是采用在合闸时接入电阻的方法控制的,电阻可两级接入。组合结构的断路器可用单柱或单个断口的试验来确定其额定值 ...
西安高压电器研究所全封闭电器组
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Duncan-Chang Constitutive Model of Vetiver Root and Soil Matrix at Different Growth Stages [PDF]
[Objective] To investigate the constitutive relationship governing the entire failure process of root-soil matrixs. [Methods] By employing the Duncan-Chang model and conducting triaxial tests, a stress-strain constitutive relationship model was developed
JI Jinnan, WU Ruibin, YANG Yuzhe
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Effects of Vegetation Restoration on Soil Infiltration and Runoff in the Gully Regions on the Loess Plateau [PDF]
[Objective] To study the effects of vegetation restoration on rainfall infiltration and runoff is of great theoretical and practical value for rational utilization of watershed water resources and ecological construction.
BAI Yungang +4 more
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First sliding area analysis of expansive soil slope based on the upper and lower bound solutions [PDF]
Expansive soil landslides are prone to frequent disasters due to the expansion, cracking, and over-consolidation characteristics of expansive soil. However, traditional analysis methods cannot adequately reflect the progressive failure characteristic of ...
Jiong LIANG +3 more
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Shuitu Baochi Xuebao目的为探究在干湿循环下麦壳添加对盐渍滩涂土水盐运移及土壤结构功能稳定性的影响。方法以江苏省滨海滩涂盐渍土为研究对象，基于土柱试验，分析H0、H1、H2、H3 4种麦壳添加量（分别为0、10、15、20 g/kg）、B1、B2、B3 3种土壤回填压实度（1.30、1.35、1.40 g/cm3）及C2、C4 2种干湿循环轮次（2轮、4轮）对水分蒸发速率、盐分质量分数、土壤机械组成及干燥收缩量等指标的影响。结果1）在蒸发阶段，土壤累计蒸发量与麦壳添加量呈显著正相关，H1~H3平均较H0提高22.1 ...
刘亚鑫 +5 more
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Characteristics of water absorption capacity of weathered sandstone based on nuclear magnetic resonance and wave velocity testing [PDF]
Water is a key factor in the weathering and erosion of rocks, and highly porous rocks are generally more susceptible to weathering. However, there has been a lack of in-situ methods for assessing the water absorption capacity of rocks. To investigate the
Hongbin YAN +6 more
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Slope Aspect Differentiation of Pisha Sandstone Slide Erosion and Its Response to Meteorological Factors [PDF]
[Objective] As a typical mode of gravity erosion in the Pisha sandstone area, debris sliding has become a significant source of coarse sand material within gullies, seriously threatening the ecological security of the basin.
LI Long +4 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 2009 【目的】 探讨氧控制性再灌注(OCR)对体外循环肺缺血再灌注(I/R)早期损伤的作用65377; 【方法】 14只健康犬随机分为对照组(I/R,n = 7)和实验组(OCR, n = 7)65377;对照组全程FiO2 80%;实验组在主动脉开放即刻调整FiO2至40%,随后每5 min依次上调10%,最后达80%,其余时段均维持FiO2 80%65377;检测动脉血气,观察两组犬在麻醉后65380;主动脉开放前65380;开放后565380;1065380;1565380;2065380;25 ...
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