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| 1 | A discrete element model for simulating saturated granular soil显示文摘A numerical model is developed to simulate saturated granular soil, based on the discrete element method. Soil particles are represented by Lagrangian discrete elements, and pore fiuid, by appropriate discrete elements which represent alternately Lagrangian mass of water and Eulerian volume of space. Macroscale behavior of the model is verified by simulating undrained biaxial compression tests. Micro-scale behavior is compared to previous literature through pore pressure pattern visualization during shear tests. It is demonstrated that dynamic pore pressure patterns are generated by superposed stress waves. These pore-pressure patterns travel much faster than average drainage rate of the pore fiuid and may initiate soil fabric change, ultimately leading to liquefaction in loose sands. Thus, this work demonstrates a tool to roughly link dynamic stress wave patterns to initiation of liquefaction phenomena. | Ali Asghar Mirghasemi | 2011 | Particuology2011，9，6： | 4 |
| 2 | 脂蛋白脂酶多态性对郑州地区汉族糖尿病合并冠心病发病的影响显示文摘目的 探讨脂蛋白脂酶 (lipoproteinlipase ,LPL )对 2型糖尿病和糖尿病合并冠心病发病的影响。方法 测定 2型糖尿病 (10 5例 )和糖尿病合并冠心病 (10 8例 )患者和对照组 (10 1例 )外周血白细胞LPL内含子 6的PvuⅡ和内含子 8的HindⅢ多态性 ,以及血清胆固醇 (TC)、甘油三酯 (TG)、高密度脂蛋白胆固醇 (HDL C)等水平。结果 ①LPL基因PvuⅡ的等位基因P +和P -频率对照组分别为 0 .6 9与 0 .31,2型糖尿病组为 0 .6 3和 0 .37,糖尿病合并冠心病组为 0 .5 9与 0 .4 1,3组相比其差异无统计学意义。HindⅢ等位基因H +和H -频率对照组分别为 0 .6 8和 0 .32 ,2型糖尿病组为 0 .6 7和 0 .33,糖尿病合并冠心病组为 0 .6 8与 0 .32 ,3组间的差异无统计学意义。② 2型糖尿病LPL基因PvuⅡ基因表型P - /P -患者血清TG [(1.5± 0 .5 )mmol/L]、TC [(5 .0± 1.2 )mmol/L]、LDL C [((3.8±0 .9)mmol/L]及糖尿病合并冠心病P - /P -患者的TG[(2 .1± 1.1)mmol/L]、TC[(5 .3± 1.9)mmol/L]和LDL C[(4 .0± 1.9)mmol/L]的水平均低于同组内非P - /P -表型 (P <0 .0 5 ) ,而P - /P -表型 2型糖尿病患者HDL C[(1.0± 0 .4 )mmol/L]水平则高于同组非P - /P -表型患者 (P <0 .0 5 )。 3组中HindⅢ基因型H - /H -患者血清TG、TC? | 钱庆文 钱书虹 王诗瑾 | 2004 | 临床荟萃2004，19，17： | 1 |
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