西方戏剧魅力的回归——浅析西方戏剧特征在电影《电话亭》中的体现

电影《电话亭》（Phone Booth）充分体现了西方戏剧的一些重要的特征。《电话亭》舍弃了电影擅长的时空及人物的多样性,选择恪守传统戏剧的“三一律”,只利用非常有限的场景、时间和人物,制造出一波三折的戏剧性冲突,体现了西方戏剧是激变型的艺术这一特征。此外影片还体现了基督教的“性恶论”与西方悲剧的关联,具有警世的意味。     

Effect of fretting amplitudes on fretting wear behavior of steel wires in coal mines

Given that fretting wear causes failure in steel wires, we carried out tangential fretting wear tests of steel wires on a self-made fretting wear test rig under contact loads of 9 and 29 N and fretting amplitudes ranging from 5 to 180 μm. We observed morphologies of fretted steel wire surfaces on an S-3000N scanning electron microscope in order to analyze fretting wear mecha-nisms. The results show that the fretting regime of steel wires transforms from partial slip regime into mixed fretting regime and gross slip regime with an increase in fretting amplitudes under a given contact load. In partial slip regime, the friction coefficient has a relatively low value. Four stages can be defined in mixed fretting and gross slip regimes. The fretting wear of steel wires in-creases obviously with increases in fretting amplitudes. Fretting scars present a typical morphology of annularity, showing slight damage in partial slip regime. However, wear clearly increases in mixed fretting regime where wear mechanism is a combination of plastic deformation, abrasive wear and oxidative wear. In gross slip regime, more severe degradation is present than in the other regimes. The main fretting wear mechanisms of steel wires are abrasive wear, surface fatigue and friction oxidation.     

生活质量视阈下的大学生“精神贫困”测量指标研究

高校大学生＂精神贫困＂现象已引起人们重视,成为多方关注话题。本文在梳理前人研究成果基础上,对＂精神贫困＂测量指标进行研究,以获得科学的测量指标体系,为获得真实科学的一手资料打进行理论论证。     

脂肪醇生物活性和理化性质的QSAR/QSPR研究

为了研究脂肪醇结构-性质(活性)的定量关系,用相对键长取代拓扑距离,结合距离矩阵,提出了距离调和拓扑指数Te,Te和醇的许多理化性质和生物活性具有良好的相关性.用Te及δ(醇中和羟基相连的碳原子的支化度)与脂肪醇的溶解度、辛醇/水分配系数、急性生物毒性、蒸发热、摩尔磁化率关联,复相关系数分别为0.9955,0.9951,0.9941,0.9964,0.9968,优于文献.同时与脂肪醇的气相色谱保留指数也相关得很好,相关系数为0.9956.结果表明,Te指数可用于醇多种理化性质和生物活性的预测.     

盈余质量与公司治理关系的实证研究

对公司治理系统中的主要特征变量与盈余质量关系的统计分析结果表明:独立董事的比例和盈余质量之间存在倒U型曲线关系;董事会会议次数和盈余质量正相关;而董事会规模和盈余质量的关系不显著;债务约束不构成中国上市公司盈余管理的动机;而提高净资产收益率的动机非常明显.政策结论在于:单纯的独立董事制度改革对提高盈余质量的作用有限,公司治理改革必须配合市场改革措施才能更有效地发挥提高盈余质量的作用.     

深基坑工程安全评价的尖点突变模型

为评价深基坑工程失稳的突变特征,采用突变理论建立了深基坑工程尖点突变安全评价模型.根据工程安全监控理论,引入突变理论,以基坑水平变形为例,考虑深基坑土体的流变特性,建立了基于时效影响因子的深基坑工程尖点突变安全评价模型.实例分析表明,尖点突变安全评价模型克服了采用常规设置监控值评价时参数选择困难,并能反映基坑失稳突变性的特点,可以量化评价基坑安全程度,正确评价安全状态,具有适应性强、精度高的优点.     

新型钢铅组合耗能器性能试验及参数优选

为了考察新型钢铅组合耗能器(NCSLD)的力学性能和提高其耗能能力,利用电液伺服压剪试验机对NCSLD耗能器进行力学性能试验,采用ANSYS实体建模的方法对耗能器进行大量的数值分析,并对性能试验和数值分析的结果进行对比,研究耗能器的滞回特征参数与其6个几何参数之间的关系,回归出二者之间的公式.提出评价耗能器性能优劣的标准及其附加条件,并以此标准为依据,利用均匀设计法和遗传算法分别对耗能器的6个几何参数进行优选.结果表明遗传算法的选优效果要好于均匀设计法,同时得到一系列性能良好的NCSLD耗能器.     

S-P混杂纤维对混凝土长期性能与耐久性影响

采用对比的试验方法,研究并讨论了钢纤维、聚丙烯纤维及其混杂对混凝土长期性能及耐久性的影响.研究结果表明,用不同尺度、不同性质的钢纤维与聚丙烯纤维按二元混杂以总体积率0.9%掺入高性能混凝土中,明显改善了水泥混凝土的长期性能,90d干缩值减少36.6%,200d徐变度降低45.4%,并可显著提高混凝土的耐久性能,相对渗透系数降低79.03%,氯离子渗透系数降低30.5%.     

Electroless nickel plating on the surface of carbon fibers

The electroless nickel plating on the surface of carbon fibers was prepared by pretreating the carbon fibers in order to increase their conductivity,and consequently enhance the EMI shielding effectiveness of the composites.The relationship between the performance of depositing coat and pH value,temperature,reaction time and the way of agitation was studied.Results show that the depositing quality is stable under pH between 4.5 and 5.0,temperature between 75 ℃ and 85 ℃,reaction time for 10 min and air agitation.The uniform and compact nickel layer deposited on carbon fibers was proved by XRD and SEM,and the electrical resistivity of carbon fibers with nickel coating was tested.Results indicate that the electrical resistivity of carbon fibers with electroless nickel plating is decreased by an order of magnitude compared with that of carbon fibers.It means that nickel coating can greatly improve the electromagnetic interference shielding properties of carbon fibers.     

开封引黄灌区灌溉条件下稻田土壤盐分阈值研究

结合各生育期水稻耐盐度、各处理实际种前初始土壤含盐量和对应生育期最高的土壤含盐量,分析了各灌溉处理条件下的稻田土壤含盐量在水稻各生育期的动态变化规律和允许初始土壤含盐量阈值.结果表明:控制灌溉及控制灌溉加淋洗条件下,各水稻生育期土壤含盐量均有不同程度降低,随着淋洗水量的增加土壤含盐量逐渐降低,并获得了不同灌溉方式下的允许稻田初始土壤含盐量阈值.此结论对实际应用有指导意义.