液压泵零流量压力急增故障的分析与排除

针对液压泵在试验中成批出现零流量压力急剧增大的故障现象,从液压泵的工作原理出发对其进行分析,找到了故障原因,并采取了相应的措施,使故障有效排除,从根本上解决了生产中的疑难问题.     

提升就业能力:缓解大学生就业难的重要选择

高等教育大众化条件下的大学生就业形势日趋严峻,缓解大学生就业结构性矛盾的难题需要不断增强毕业生的就业能力。合理调适专业、坚持特色育人、强化就业指导是现行教育体制下提升大学生就业能力的有效举措。     

220kV变压器线圈现场施压及压板强度研究

对SFPSZ9－150000／220特大型变压器线圈现场施压进行了探讨性的试验，提供了一些可行性的计算方法，分析了试验结果并提出了存在问题与一些合理建议。     

Impact absorption of tennis shoe-surface combinations

The aim of this study was to investigate, for typical shoes and surfaces used in tennis, the relative role of the shoe and surface in providing cushioning during running. Five test surfaces ranging from concrete to artificial turf were selected, together with two shoe models. Impact absorbing ability was assessed mechanically using drop test procedures and biomechanically using peak magnitude and rate of loading of impact force and peak in-shoe pressure data at the lateral heel. Differences in biomechanical variables between shoe-surface combinations were identified using a two-way ANOVA (p < 0.05). Mechanical test results were found to rank the surfaces in the same order regardless of the shoe model, suggesting that the surface is influential in providing cushioning. However, for all mechanical and biomechanical (p < 0.05) variables representing impact absorbing ability, it was found that the difference between shoes was markedly greater than the differences between surfaces. The peak heel pressure data were found to rank the surfaces in the same order as the mechanical tests, while impact force data were not as sensitive to the changes in surface. Correlations between mechanical and biomechanical impact absorption highlighted the importance of testing the shoe-surface combination in mechanical tests, rather than the surface alone. In conclusion, mechanical testing of the shoe-surface combination was found to provide a strong predictor of the impact absorbing ability during running if pressure data were used. In addition, for typical shoe-surface combinations in tennis, the shoe was found to have more potential than the surface to influence impact loading during running. Finally, in-shoe pressure data were found to be more sensitive than force plate data to changes in material cushioning.     

利用传真地面图确定航线上的风情

对如何利用传真地面图确定航线上的风情进行了介绍。利用查表的方法确定航线上的风速非常便捷,风向确定也较容易,适合船舶驾驶员在实践中应用。经矢量标绘后,驾驶员可对航线的风情一目了然。     

知识分子健身模式初探

为响应全民健身号召 ,“积极为知识分子创造体育健身条件 ,倡导和推广适合其工作特点的体育健身方法” ,提高知识分子身体的机能状态水平 ,本文根据体育学的有关原理 ,结合当前体育健身的一些新观点 ,设计出符合知识分子特点的健身模式 ,为知识分子健身提供参考。     

赛艇可视化多功能智能测试训练系统的研制

本文研制了一种赛艇可视化训练测试系统。该系统采用液压作阻力源,以正确地模拟桨叶在水中划动时的阻力特性,利用微机进行采集以测试赛艇运动员技术动作的力学指标,利用图形软件来显示模拟赛艇在水中的运动情况,构成一整套赛艇模拟测试的可视化系统。通过该系统不仅可以进行赛艇运动员的身体力量训练,还可以从生物力学角度研究赛艇技术动作,以评价和完善运动员的技术动作,是一个能进行测试、比赛、训练、分析评估的智能化的赛艇可视化测试训练系统。     

最大吸氧量间接测算全新通用方程及其应用

作者论证了最大吸氧量间接测算全新通用议程组男VO2m,Ka;女,VO2mKa.式中：P,运动强度,单位,瓦;f,运动心率,次／分;n＝0.16－0．21,人机效率;Ka＝1．25~0．01A,A,年龄系数。在A＝25、P＝50~200瓦、f＝120~170次／分之间,方程组VO2m测算范围（1．6~6．0）升／分,包括体力弱者及世界级马拉松运动员,与奥斯特兰德实测数序表偏差不大于3％。     

运动员的情绪压力调节方法初探

通过对运动员的情绪压力调节方法的初探,包括：何谓压力及产生的原因、压力调节的方法、压力调节的实施步骤,并进行了分析     

银杏口服液配合太极拳对高血压患者血压和血脂的影响

目的:研究银杏口服液配合太极拳对高血压患者血压和血脂的影响的效果.方法:50名患者随机分为两组,运动组和对照组.运动组引用银杏口服液配合太极拳运动,对照组服用西药.记录其治疗前后血压和血脂.结果:银杏口服液配合太极拳能够有效的降低高血压患者的血压,能够改善其血脂含量.