大型油船货油装卸仿真模拟装置的开发   总被引：1，自引：0，他引：1  

曾向明詹玉龙  张道兵 《上海海事大学学报》2006,27(1):5-8

运用计算机仿真技术和V isual C 软件设计工具,开发研制基于大型油船货油装卸系统的仿真模拟装置,以供教学与船员培训之用.探讨大型油船货油装卸仿真模拟装置的应用,介绍系统的结构以及软件的实现方法.  相似文献   

体育锻炼对记忆力影响的实验研究   总被引：1，自引：0，他引：1  

李爱荣 《安徽体育科技》2001,22(2):94-96

体育锻炼能增强人的体质，提高人的素质，这已为大家所共识。体育锻炼对人的记忆力是否起作用?本文对40名在校中师生实验验证，结果证明：体育锻炼不仅能增强体质，也能增强人的记忆力，对学生好好学习，牢固掌握所学的文化知识同样起决定作用。  相似文献   

沙地力学传递特性的实验研究及沙滩排球扣球起跳的动力学特征     

李世明  刘学贞 《北京体育大学学报》2001,24(2):260-263

采用跳深的方法对约 40 cm深沙地的力学传递特性进行实验研究 ,并引入“黑箱”理论进行动力学与动力学数据的对比分析以获得沙地力学传递函数 :力传递函数为 Fd=0 .39Fu1 .1 6 ,冲量传递函数为 Id=0 .88Iu;在此基础上 ,采用录像系统与三维测力台系统实现对沙滩排球扣球起跳阶段的运动学与动力学数据的同步采集 ,揭示其主要动力学特征为沙滩排球扣球起跳的恢复系数小以及其形成的三方面原因 ,以图为沙滩排球的科学化训练提供可靠的理论依据。  相似文献   

网球发球动作和基本技术模式   总被引：23，自引：1，他引：22  

严波涛  李早 《中国体育科技》2001,37(10):36-40

通过对参加第27届奥运会选拔集训的26名国家队男、女运动员动作技术分析,并参考世界优秀网球运动员的发球技术,从中概括出理论和实践上我们认为比较合理的、适合我国运动员使用的网球发球技术动作模式.  相似文献   

对排球发旋转球的分析与探讨   总被引：4，自引：0，他引：4  

贾卫国 《中国体育科技》2001,37(2):37-38

本文运用力学理论对排球弧线飞行的原理以及排球发旋转球的抛球和击球进行了分析，提出了采用抛旋转球的方法来发旋转球，以丰富发球方法。  相似文献   

碳含量对铁基粉末冶金摩擦材料力学性能的影响     

钱中良 《常州轻工职业技术学院学报》2006,(1)

随石墨含量增加,铁基粉末冶金含油减磨材料机械性能的变化趋势是密度增加,含油率下降,布氏硬度增加,而压溃强度减小。研究结果表明,石墨含量为1.5wt%和2.0wt%时力学性能较好。  相似文献   

《AutoCAD》教学与《机械制图》国家标准     

郑仪  林芸  王莉娟 《贵阳金筑大学学报》2002,(4)

近年来,随着计算机技术的发展,计算机绘图逐步取代了图板和手工绘图。工科院校均开设了AutoCAD这门课程。AutoCAD软件的功能强大,但它的初始模板在许多方面不符合我国《机械制图》国家标准。该课程仅要求学生如何使用AutoCAD,并没有涉及到较多的国家标准知识。因此,如何教授学生使用AutoCAD绘制出符合国家标准的图样值得注意和研究。  相似文献   

高职机械类专业学生学习兴趣的培养     

盛雪华  倪曼 《湖北广播电视大学学报》2007,27(8):21-22

高职院校机械类专业学生的学习兴趣普遍较弱,影响了学习成效。应从激发学生的奇异感和快乐感、创设知识的应用情景、发挥教学评价的激励功能等途径来发展并保护他们的学习兴趣。  相似文献   

The influence of shoe drop on the kinematics and kinetics of children tennis players     

Alexis Herbaut  Pascale Chavet  Maxime Roux  Nils Guéguen  Christophe Gillet  Franck Barbier 《European Journal of Sport Science》2016,16(8):1121-1129

This study investigated the immediate effects of reducing the shoe drop (i.e. the difference between the heel and the forefoot height) on the kinematics and kinetics of the lower extremities of children tennis players performing a tennis-specific movement. Thirteen children tennis players performed a series of simulated open stance forehands wearing 3 pairs of shoes differing only in the drop: 0 (D0), 6 (D6) and the control condition of 12?mm (D12). Two embedded forceplates and a motion capture system were used to analyse the ground reaction forces and ankle and knee joint angles and moments of the leading lower limb. In D6 compared with D12, the peak impact force was reduced by 24% (p?=?.004) and the ankle was less dorsiflexed at foot strike (p?=?.037). In D0 compared with D12, the peak impact force was reduced by 17% (p?=?.049), the ankle was less dorsiflexed at foot strike (p?=?.045) and the knee was more flexed at foot strike (p?=?.007). In addition, 4 out of 13 participants (31%) presented a forefoot strike pattern for some of the trials in D0. No difference was observed across shoe conditions for the peak knee extensor moment (p?=?.658) or the peak ankle plantarflexor moment (p?=?.071). The results provide preliminary data supporting the hypothesis that for children tennis players, using a 6-mm lower shoe drop might reduce heel impact forces and thus limit potentially impact-related injuries.  相似文献   

Effects of load mass carried in a backpack upon respiratory muscle fatigue     

Mark Faghy  Sam Blacker  Peter I. Brown 《European Journal of Sport Science》2016,16(8):1032-1038

Purpose: The purpose of this study was to investigate whether loads carried in a backpack, with a load mass ranging from 0 to 20?kg, causes respiratory muscle fatigue. Methods: Eight males performed four randomised load carriage (LC) trials comprising 60?min walking at 6.5?km?h^?1 wearing a backpack of either 0 (LC₀), 10 (LC₁₀), 15 (LC₁₅) or 20?kg (LC₂₀). Inspiratory (P_Imax) and expiratory (P_Emax) mouth pressures were assessed prior to and immediately following each trial. Pulmonary gas exchange, heart rate (HR), blood lactate and glucose concentration and perceptual responses were recorded during the first and final 60?s of each trial. Results: Group mean P_Imax and P_Emax were unchanged following 60-min load carriage in all conditions (p?>?.05). There was an increase over time in pulmonary gas exchange, HR and perceptions of effort relative to baseline measures during each trial (p?p?>?.05). Conclusions: These findings indicate that sub-maximal walking with no load or carrying 10, 15 or 20?kg in a backpack for up to 60?min does not cause respiratory muscle fatigue despite causing an increase in physiological, metabolic and perceptual parameters.  相似文献