摘要：轮毂是汽车的重要部件,既要有高承载能力,又要满足整体外观设计的要求。简单地介绍有限元分析方法的基本原理和分析步骤,基于UG strength Wizard模块对汽车轮毂进行强度分析校核,为轮毂产品的可靠性设计提供了一个有效的方法。

摘要：为了研究重塑黄土的抗剪强度及变形特性,进行了针对不同含水量和不同干密度条件下的重塑黄土的直剪试验,试验结果揭示了该区域重塑黄土的剪胀特性,以及重塑黄土干密度ρd和含水量w对黏聚力c影响的关系曲线可以用指数函数拟合的结论。

摘要：[Objective] The research aimed to provide basic files and theoretical guidance for constructing sluicing-siltation dam using soil with high clay content soil.[Method] The soils of Dagou basin near Xiwu Village of Baishui County,Shaanxi Province were taken as experimental *** pipes with same height and diameter were used to construct testing model for dynamically determining settlement,shear strength,wet density of grouting bulk under 2 different grouting speeds(15 cm/d and 25 cm/d).[Result] Under different grouting speeds,general change trend was similar during grouting *** subsidence,deformation,shear strength and wet density increased with the increase of grouting *** or six days after grouting,daily displacement under 25 cm/d grouting speed was fewer than that under 15 cm/d grouting speed.[Conclusion] The increase of grouting speed could shorten the time for reaching the same subsidence,deformation,shear strength and wet density and increased displacement at the initial stage of grouting,however,with the increase of grouting time,lower grouting bulk was bad for displacement at later grouting period because it was near impermeable layer.

摘要：高血压病的相关因素分析,是高血压病防治中的一项重要工作。由于涉及的因素极为复杂,对每个因素在疾病中影响程度用经典数学方法确定比较困难,因此,我们采用模糊数学方法对老年人高血压病作了如下初步研究。一、材料来源本资料系北京老年医学研究所对北京市60岁以上老年人常见病流行病学调查资料,调查时间为1988年10月。整个设计,用目的抽样定点总人口数16,103人,其中老人数.760人,老年人口系数10.93％,再采用随机整群抽样,选取老年人共445例,其中男117例,女328例。高血压诊断标准按WHo统一标准进行。挑选了13个分析变量,包括性别、