试论高校党员主体地位的确立

维护高校党员的主体地位,对实现和谐发展、提高党委执政能力、培养可靠接班人具有重要意义。但高校存在着党员主体作用发挥不够、主体保障机制缺失等问题,究其原因,在于传统观念、社会心理、主体素质等方面的影响,所以,高校应坚持权利本位、民主集中制、制度与机制保障等基本原则,通过环境营造、党性锤炼、学习教育、主体机制、加强研究等现实路径来确立党员的主体地位。     

不规则截面钢筋混凝土梁柱单元模型及应用

为了更好地研究钢筋混凝土梁柱结构的非线性力学性能,建立考虑材料非线性和几何非线性耦合的钢筋混凝土梁柱单元模型.基于杆件分析的平截面假设和截面高斯积分法,应用钢筋和混凝土材料本构关系非线性,推导出不规则截面钢筋混凝土梁柱单元的截面刚度矩阵,进而通过虚功原理建立钢筋混凝土梁柱单元切线刚度矩阵;并采用弧长增量迭代法求解非线性方程组,编制不规则截面钢筋混凝土梁柱结构的数值分析程序.对规则和不规则截面钢筋混凝土框架进行了非线性全过程分析,理论分析结果与试验结果比较,吻合较好.表明所建立的钢筋混凝土梁柱单元模型适用于钢筋混凝土梁柱结构的非线性力学分析;由于采用截面高斯积分法,对不规则截面的梁柱结构计算显得十分便捷.     

正确处理大学生党员发展工作中数量和质量关系

通过“一个思想、两个重视、三个机制、六个制度”等方面的阐述,辨证看待和正确处理大学生党员发展工作中数量和质量关系,从而保证培养高素质的社会主义事业建设者和接班人。     

水工混凝土结构设计规范基本构件的相当安全系数的计算分析

以我国现行DL/T 5057-1996"水工混凝土结构设计规范"中的轴心受拉、受弯、受剪、受扭、轴心受压、大偏心受压、小偏心受压、板受冲切等8种典型的基本构件为例,从相当安全系数的角度,对DL/T 5057-1996规范承载能力极限状态的安全度设置水平进行了计算分析,结果表明,当作用效应比值较小时,采用分项系数设计表达式进行设计时较为经济;当作用效应比值较大时,采用系数设计表达式进行设计时更为合理,使得所设计的结构构件在安全可靠与经济合理之间,在不同设计条件下都能达到一种较佳的平衡.     

一种刚柔组合新机构的命名、分析与综合

对一种刚柔组合的新机构──挠性件连杆停歇机构的工作原理、运动规律及其综合方法作了系统、完整的阐述，建立了位移关系函数，明确了各主要运动学参数对运动及动力特性的影响，给出了运动学参数约束条件，提出了尺度综合的图解法与解析法。并讨论了正确命名。     

Characterization of four petrologic end members from Alberta oil sands and comparison between different mines and sampling times

The current research was performed on four petrologic end members samples from Syncrude's North Mine collected in 2012 (NM12), i.e. marine clay (MC), marine sand (MS), estuarine clay (EC), and estuarine sand (ES). The mineralogical compositions of the four petrological end members were determined using X‐ray diffraction (XRD), quantitative XRD (QXRD), elemental analysis, and particle size distribution (PSD) measurements. Bulk samples from the four petrologic end members, after bitumen removal, were mainly composed of clay minerals (kaolinite, illite, chlorite, and mixed‐layer expandable clays) and non‐clay minerals such as quartz, carbonates, feldspars, and traces of TiO₂ minerals, gypsum, and pyrite. Bulk samples of the clay end members were composed of significantly higher amounts of clay minerals and lower amounts of quartz compared with the bulk samples of the sand end members. XRD analysis of oriented preparations (air dried‐54 % RH and ethylene glycolated) of the < 0.2 μm fractions of the four end members showed that interstratified illite‐smectite of high (～30 %) and low (～10 %) expandability were observed only in clay‐rich end members, i.e. NM12‐EC and MC, respectively. Kaolinite‐smectite was only found in the < 0.2 μm fraction of the NM12‐MC with an expandability between 5 and 10 %. Interstratification of illite‐smectite was observed in the < 0.2 μm fraction of NM09‐MC and EC samples but the expandability was only 10 % for both fractions. However, kaolinite‐smectite was not found in the same fraction for NM09‐MC and EC. ES and EC had the highest and lowest bitumen contents, respectively, for the NM12, NM09, and AM10 samples.     

Predicting protected steel member fire endurance using spread-sheet programs

The simple method of computing the time-temperature response of protected steel members that has been recommended by the European Convention for Constructional Steelwork (ECCS) is presented in this paper. The method is a one-dimensional heat flow approach that explicitly accounts for the thickness and thermal properties of the insulation as well as the area and perimeter of the steel section.Two different cases are recognized. In the simpler, the heat required to increase the temperature of the insulation is small and can be ignored. This will be the case for sprayed mineral fiber fire protection. In other cases, a large amount of heat is absorbed by the insulation and it must explicitly be taken into account. This will be true for gypsum plaster, concrete, or masonry fire protection.A time-step approach is used, in which thermal equilibrium is considered during each of several short time intervals. This leads to repetitive calculations in a format ideally suited to use in a spreadsheet program in a microcomputer. The time-temperature course of the fire is explicitly taken into account, and the fire may follow the ASTM E-119 curve or any other curve.Three examples are presented, and comparisons of measured and computed fire endurances are made, with reasonably good agreement found.     

空腹楔形轴心受压构件稳定性分析

变截面楔形构件和蜂窝梁都能够节约材料 ,提高构件的承载力。本文在二者的基础上 ,对热轧H型钢进行两次切割 ,加工成空腹变截面构件 ,利用ANSYS对不同孔洞大小、间距和楔率的空腹楔形构件进行稳定和承载力分析 ,发现孔洞大小、间距和楔率在一定范围内 ,对空腹变截构件的刚度和承载力影响不大     

大型抽空式网架设计

本文介绍了大面积抽空式网架的设计和理论依据,首次应用到冶金重型工业厂房结构上,取得了较大的综合经济效益,并发现了大面积抽空式网架内力重分布的规律.为今后进一步在工业厂房的推广,积累了宝贵的实践经验.     

铝合金-混凝土组合结构研究综述

通过总结铝合金材料的优点及纯铝合金结构的应用状况表明铝合金材料在工程结构领域具有很好的应用前景,并且阐述了铝合金-混凝土组合结构具有很好的应用潜力。然后通过对铝合金管混凝土组合构件、铝合金配筋混凝土梁和铝合金-混凝土组合梁这3种主要的铝合金-混凝土组合结构的研究现状进行综述,最后进一步总结了铝合金组合结构未来的研究方向,为后续的研究工作提供参考。