某型手枪立姿射击人体受力特性仿真研究

手枪射击以人体为架座,射击中后坐力对人体有很大的冲击作用.在分析了手枪射击动力学特性和立姿射击人体受力特性的基础上,运用MSC.ADAMS软件和BRG.LifeMOD软件建立了某型手枪立姿无依托人-枪系统虚拟样机.通过仿真研究,得到了手枪与右手之间的作用力,分析得出了人体各个关节的冲击受力特性,并重点研究了右肩关节的受力情况.论文研究内容对射击训练和手持轻武器效能的最佳发挥提供了参考.     

基于累积前景理论的动态随机多准则决策方法

针对准则权重完全未知、准则值为离散型随机变量的动态随机多准则决策问题,提出了一种基于累积前景理论和集对分析的决策方法。该方法引入决策者的风险态度,首先根据分布函数计算不同时期的前景值,然后由二项分布法确定时间序列权重,基于离差最大化思想构建优化模型,确定准则权重,并引入集对分析中的同一度、对立度和集对势的概念,利用综合集对势的大小对备选方案排序。最后通过一个风险投资问题验证了该方法的有效性。     

带压开孔技术在300万吨/年重催装置中的应用

以兰州石化炼油厂300万吨/年重油催化裂化装置E-307空冷设备的循环水线(DN450)带压开孔为例,从工程概述、施工准备、施工流程和安全措施等多个方面进行了详细的阐述。介绍了工艺管线常用的带压开孔施工方法及安全注意事项。     

对采煤机行走轮精铣齿形的数控加工编程研究

数控立式加工中心机床对于形状复杂但却有一定规律的零件,如：行走轮,可通过利用数控原理中数学计算,应用宏程序进行编制程序代码,可实现准确的自动加工。提高了产品的精度,加工效率,满足了使用性能的要求。     

学分制教学改革后高校体育选项课的教学管理平台的构建

通过文献、问卷调查、专家访谈、数理统计等方法对安徽省实行学分制的高校开展体育选项课的情况进行调查分析,指出高校应建立健全网上选课系统软件的开发和研究,合理调配教师队伍的业务结构,建立健全高质量的符合学分制教学管理要求的师资队伍群,在教学考核中统一教学考核方法和标准,做到教考分离是完善学生选课的关键。     

论课程的政治权力——俄罗斯当权政治力量与课程政策的价值取向

现实的课程政策主体及其所认同的政治思想构成一种当权政治力量,体现着课程政策主体的课程意志并支配着课程政策的价值取向,从而形成课程的政治权力;这种课程权力在一个国家经历社会重大变革的时候,更加凸现出对课程的发展意义.本文以俄罗斯为对象演绎课程的政治权力,以揭示出当权政治力量对课程政策价值取向的作用.     

超声电机振子驱动定位齿设计

设计一种旋转驻波超声电机振子驱动定位齿,可以实现对超声电机预先调整振子齿位置,达到精确定位.通过使用有限元分析软件对电机振子振动模态进行分析,设计了振子的尺寸,并制作了原理样机.实现了输入电压260 V,共振频率为40.55 kHz时,输出力矩17N＆#183;m.     

Success in higher education: the challenge to achieve academic standing and social position

When students look at their classmates in the classroom, consciously or unconsciously, they see competitors both for academic recognition and social success. How do they fit in relation to others and how do they succeed in achieving both? Traditional views on the drive to succeed and the fear of failure are well known as motivators for achieving academic success but is it that simple a dichotomy? Do students also view success through a fear of success and a purposeful intent to fail – referred to in this text as the drive to fail? Students recognize the importance of social position in class but how is this perceived and will they sacrifice social position for academic standing or vice versa? This paper considers these issues by analyzing the results of a student survey and opinions offered by the students. The discussion considers the survey, academic standing, social position, cultural variables, perception of success and failure, and concluding comments.     

《老子》与现代企业管理

老子的哲学思想为现代企业管理提供了有益借鉴.在现代企业管理中,"无为"是为了达到"无不为"-大有作为;"不争"-不为一己私欲争夺计较,才能争得为企业中心服务的最大成功;诚信应成为企业管理的基础;注意细节,才能做精做细,才能真正体现管理的作用和价值.     

Suffering in sport: why people willingly embrace negative emotional experiences

ABSTRACT

Nearly everyone agrees that physical pain is bad. Indeed, if anything merits the status of a platitude in our everyday thinking about value, the idea that pain is bad surely does. Equally, it seems clearly true that emotional suffering – despair, loneliness, grief, disappointment, guilt, shame, lovesickness, and the like – are all bad as well. We are strongly inclined to pity and feel sorry for those who suffer emotionally in these ways; we are motivated, at least some of the time, to do what we can to alleviate their suffering. Given this, it might seem curious that pain and suffering are so integral to sport – whether one is a participant or a spectator. There’s nothing particularly puzzling about pain and suffering that is inadvertently related to sport – as when an athlete injures her hamstring and has to miss her chance at Olympic glory, or when supporters face the misery of getting up at 6am because an away game has been scheduled to start at noon. But there does seem to be something curious about the extent to which pain and suffering are voluntarily embraced by participants and spectators, as the quotation from Nick Hornby aptly illustrates. Why do people willingly engage in something that brings about so much suffering? In this paper, I’ll attempt to answer this question.¹