新型高速杆端关节轴承的寿命设计与试验研究

重点阐述BRM12型新型高速杆端关节轴承与PHS12型普通球面关节轴承的寿命设计与韦布尔寿命对比试验论证。试验结果表明：BRM12型高速杆端轴承使用寿命是PHS12型使用寿命的7.4倍。     

基于先排序再比较计算元素权重的层次分析法

在层次分析法中,提出了先排序再比较确定元素权重方法替代用判断矩阵确定元素权重的方法.此方法一定程度上减少了判断不一致性、降低了人工比较次数,更适用于涉及因素和对象较多的问题.实验结果表明该方法的有效性.     

成绩正态校验的VBA实现

现有成绩分析管理系统中包含成绩正态分布校验功能,对教学的分析和评价具有至关重要的作用.在VBA的基础上,给出了峰度、偏度正态校验方法的实现过程,并且在校验前,借鉴经验采用均值等方法对成绩数据进行预处理,在正态校验前剔除掉不符合要求的数据,降低了计算量,提高了计算效率,得到较好的分析效果.     

论浙江省普通话水平测试“机助人测”的利与弊

浙江省普通话水平测试"机助人测"系统,经过几年的运行,发现其有利于节约测试时间,有利于测试员灵活掌握测试节奏,有利于学生测试状态的正常发挥和应试心理的调适;但也存在着测试过程中学生的应试节奏把握不太好,测试员的测试状态和测试水准难以均衡,测试题目和测试系统不够完善等弊端。     

On theory and methods for advanced detonation-driven hypervelocity shock tunnels

This study describes theory and methods for developing detonation-driven shock tunnels in hypervelocity test facilities. The primary concept and equations for high-enthalpy shock tunnels are presented first to demonstrate the unique advantage of shock tubes for aerodynamic ground-based testing. Then, the difficulties in simulating flight conditions in hypervelocity shock tunnels are identified, and discussed in detail to address critical issues underlying these difficulties. Theory and methods for developing detonation drivers are proposed, and relevant progress that has advanced the state of the art in large-scale hypersonic test facilities is presented with experimental verifications. Finally, tailored conditions for detonation-driven shock tunnels are described, laying a solid foundation to achieve long test duration. This interface-matching key issue encountered in developing shock tunnels has been investigated for decades, but not solved for detonation drivers in engineering applications.     

主客观信息融合的港口综合能源系统评价指标体系

为建立绿色港口,实现港口的节能环保,对港口综合能源系统(port integrated energy system,PIES)的评价方法进行研究,提出一种主客观信息融合的PIES评价指标体系,将主观评价与数理统计模型进行结合,兼顾评价过程中的主客观因素,并采用基于马氏距离的统计检验方法对评分矩阵进行修正,实现对PIES的全面评价。通过青岛港董家口港区的调研数据,验证该方法的有效性。     

Postural balance and rifle stability in a standing shooting position after specific physical effort in biathletes

The aim of the study was to evaluate the effect of maximal specific physical effort on postural balance and rifle stability in biathletes in a standing shooting position. The study included 10 junior elite biathletes. The measurements were taken with the Vicon system and AMTI force platform. Postural balance and rifle stability characteristics were determined at rest as well as 1 and 5 min post maximal specific physical effort which was performed on a ski ergometer and continued until exhaustion. Maximal physical effort exerted a significant effect on all examined postural sway and rifle sway characteristics. The duration of the post-exercise changes was longer than 5 minutes. Higher post-effort rifle sway was observed in the vertical direction than in the across the shooting line direction. Post-effort postural balance impairment in the shooting line was much greater than in the across the shooting line direction. Moreover, a strong correlation was found between postural balance and rifle stability. Maximal physical effort influenced postural balance and rifle stability during aiming. Rifle sway during aiming in a standing shooting position seems to be coordinated with the postural sway of the biathlete’s body. Thus, an increase in postural sway contributes to greater sway and lesser stability of the rifle.     

爱的源头情的绝唱——浅析《诗经·国风》中的爱情诗

《诗经·国风》中的爱情诗,是《诗经》中具有人民性和健康审美情感的精华部分.透过这些作品,我们可以了解到《诗经》时代人民纯挚的爱情生活,由尔激励和警策现代人更深刻更广泛地去认识生活、追求自由幸福的婚姻生活.     

语料库在高职高专酒店英语教学中的运用

语料库语言学是信息科技的产物,它已在语言教学领域初步使用。通过运用大量的真实语言情景材料和利用计算机对大量语料进行分析、处理,在英语教学中产生了较大而深远的影响。立足于实际教学,探讨了这一影响,分析了语料库在英语教学中的重要作用,通过研究指出在建设、推广、研究及应用语料库等方面存在的现实问题。     

基于jsp-vrml-java技术的网上虚拟情境性学习平台的建构

虚拟现实技术在营造虚拟情境方面有着其它技术不可比拟的优点,在建构主义学习理论的指导下,将java语言的普适性,jsp技术的交互性与虚拟现实建模语言(vrml)巧妙结合,构造出情境化的网上学习环境,实现了学习者网上学习的自主化、自适应化和有意义化。