对航迹计算法几点误解的剖析     

王志明 《上海海事大学学报》2002,23(2):10-13

针对目前航海人员对航迹计算法产生的几点误解进行了全面的剖析 ,指出应如何正确理解航迹计算公式的图解法 ;旨在帮助航海驾驶员消除误解 ,引导这一方法的正确运用。  相似文献   

对我校体育系田径专业学生专项训练改革的探讨     

柴国荣  孙景立 《北京体育大学学报》2002,25(5):699-700

为了满足用人单位的需要,必须对目前体育系田径专业现行的教学内容和方法进行必要的调整.通过对学生和用人单位问卷调查,结果表明:体育系田径专业学生过于突出专项训练,并没取得应有的效果,多数学生对目前的训练模式持否定态度,希望增加田径其他项目的学习,增加田径教学理论的系统讲授,特别强调注重教学能力的培养.  相似文献   

中国田径发展规律及未来成绩预测研究   总被引：14，自引：2，他引：12  

李春雷  马元康 《北京体育大学学报》2002,25(6):837-840

分析了中国田径运动在发展过程中表现出的特点,揭示了中国竞技田径运动发展的规律;并对未来田径成绩的近期走势进行了动态的预测;为中国竞技田径运动持续发展提供了建议和对策.  相似文献   

对中专学校田径技术教学的研究     

黎艳娟 《河北体育学院学报》2002,16(1):48-49

中专生田径技术特点、生理特点等方面对中专学校田径技术教学进行了探讨,旨在为搞好中专学校田径技术教学提供一些参考依据。  相似文献   

田径技术教学中学生产生错误动作的原因及运动技能能力提高的干扰因素   总被引：4，自引：0，他引：4  

骆建  陈广勇 《北京体育大学学报》2005,28(12):1684-1686

对运动技能形成的传统观点进行了重新认识,对田径运动关于运动技能形成的三个阶段之间的关系提出了质疑.结合运动技能形成过程中的生理、心理特点,分析了导致学生学习技能过程中产生错误动作的原因.认为:学生学习技能过程中,如果静态与动态概念不清、运动负荷强度过大、心理定向错误、基本运动能力差,必然导致错误动作的出现.这四个方面也是运动技能能力提高的随时干扰因素.  相似文献   

高校图书馆与创新教育   总被引：11，自引：1，他引：11  

黄雪雄 《图书馆论坛》2004,24(4):189-190,48

论述了高校开展创新教育的重要性和高校图书馆完全具备创新教育的功能。简述了在创新教育中高校图书馆应采取的措施：改革管理体制，促进管理创新；做好读者咨询和阅读指导工作；创造浓厚的文化气息和文明氛围；开展图书信息学教育，提高大学生的信息素质；提高图书馆工作人员的素质。  相似文献   

Respiratory frequency is strongly associated with perceived exertion during time trials of different duration     

Andrea Nicolò  Samuele M. Marcora 《Journal of sports sciences》2016,34(13):1199-1206

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Performance differences when using 26- and 29-inch-wheel bikes in Swiss National Team cross-country mountain bikers     

Thomas Steiner  Beat Müller  Thomas Maier  Jon Peter Wehrlin 《Journal of sports sciences》2016,34(15):1438-1444

The purpose of this study was to analyse the effect of bike type – the 26-inch-wheel bike (26“ bike) and the 29-inch-wheel bike (29“ bike) – on performance in elite mountain bikers. Ten Swiss National Team athletes (seven males, three females) completed six trials with individual start on a simulated cross-country course with 35 min of active recovery between trials (three trials on a 26“ bike and three trials on a 29“ bike, alternate order, randomised start-bike). The course consisted of two separate sections expected to favour either the 29“ bike (section A) or the 26“ bike (section B). For each trial performance, power output, cadence and heart rate were recorded and athletes’ experiences were documented. Mean overall performance (time: 304 ± 27 s vs. 311 ± 29 s; P < 0.01) and performance in sections A (P < 0.001) and B (P < 0.05) were better when using the 29“ bike. No significant differences were observed for power output, cadence or heart rate. Athletes rated the 29“ bike as better for performance in general, passing obstacles and traction. The 29“ bike supports superior performance for elite mountain bikers, even on sections supposed to favour the 26“ bike.  相似文献   

运用Excel解决高校田径运动会秩序册编排中的问题   总被引：1，自引：0，他引：1  

籍建东 《滨州学院学报》2008,24(3)

运用Excel"筛选"、"数据透视表"等功能,解决运动员号码生成、运动项目及各项目运动员人数的统计与整理等问题.通过此方法可以实现秩序册的规范和美观,提高高校田径运动会秩序册编排的效率.  相似文献   

Effects of power variation on cycle performance during simulated hilly time-trials     

Marc S. Wells 《European Journal of Sport Science》2016,16(8):912-918

It has previously been shown that cyclists are unable to maintain a constant power output during cycle time-trials on hilly courses. The purpose of the present study is therefore to quantify these effects of power variation using a mathematical model of cycling performance. A hypothetical cyclist (body mass: 70?kg, bicycle mass: 10?kg) was studied using a mathematical model of cycling, which included the effects of acceleration. Performance was modelled over three hypothetical 40-km courses, comprising repeated 2.5-km sections of uphill and downhill with gradients of 1%, 3%, and 6%, respectively. Amplitude (5–15%) and distance (0.31–20.00?km) of variation were modelled over a range of mean power outputs (200–600?W) and compared to sustaining a constant power. Power variation was typically detrimental to performance; these effects were augmented as the amplitude of variation and severity of gradient increased. Varying power every 1.25?km was most detrimental to performance; at a mean power of 200?W, performance was impaired by 43.90?s (±15% variation, 6% gradient). However at the steepest gradients, the effect of power variation was relatively independent of the distance of variation. In contrast, varying power in parallel with changes in gradient improved performance by 188.89?s (±15% variation, 6% gradient) at 200?W. The present data demonstrate that during hilly time-trials, power variation that does not occur in parallel with changes in gradient is detrimental to performance, especially at steeper gradients. These adverse effects are substantially larger than those previously observed during flat, windless time-trials.  相似文献