普通高校健美操课教学模式改革的实验研究   总被引：1，自引：0，他引：1  

袁焰 《哈尔滨体育学院学报》2005,23(4)

确立“健康第一”,全面提高学生身体素质的指导思想,将国际化的教学模式引入高校健身课堂,从而更好地发挥健美操的有氧运动的特性,有效提高学生的健康水平,改善心肺功能,塑造健美形体,充分调动学生学习的积极性和对健美操运动的喜爱,奠定终身体育的坚实基础。  相似文献   

高校女生12min跑取代800m跑体能测试方法的可行性研究     

朱威  曹峰锐 《精武》2012,(20):1-2

目的：对最大摄氧量和氧脉搏同800m跑、12min跑成绩的相关性作探讨,以确定哪种方法更适合作为高校普通大学生体育课体能测试的评定方法。方法：研究对象为太原理工大学20名普通在读大二女生。运用意大利科时迈（COSMED）公司生产的quarkb2型运动心肺功能测试系统测得受试对象的最大摄氧量。在标准的400m田径场上分别测得受试对象12min跑和800m跑成绩。运用SPSS11.0统计软件对测试结果进行数据处理。结果：①女生12min跑成绩同最大摄氧量绝对值、最大摄氧量相对值和氧脉搏成低度正相关。②女生800m跑成绩同最大摄氧量绝对值、最大摄氧量相对值和氧脉搏成低度负相关。结论：12min跑比800m跑更适合用于评定高校普通大学女生有氧能力的体能测试方法。  相似文献   

足球课外锻炼对改善大学生身体机能水平的实验研究     

张艳亮  施大伟 《科教文汇》2012,(10):133-134

近年来大学生身体机能水平普遍呈逐年下降的趋势,尤其心肺功能水平下降最为明显。本文运用试验方法对足球课外锻炼能否改善大学生心肺功能进行了研究,通过对学生分组并进行12分钟跑的测试,对比锻炼前后的最大摄氧量来检验锻炼效果。结论是通过科学的足球课外锻炼对于不同组别的大学生都是可以有效地改善大学生的心肺功能水平的。  相似文献   

高效节能LED驱动电路设计     

刘杰 《重庆师专学报》2013,(5):47-52

采用NPN三极管8050构建的驱动电路和单片机STC89C52实现了高亮度白光LED控制系统.系统分为主控制单元和驱动单元两个部分,采用主从式传输控制方式,驱动单元控制电路实时采集所需的数据,并及时上传至主控制器,而主控制器则根据上传的实时数据,对驱动单元下达设定数据以及控制命令;通过单片机发送PWM脉冲控制高亮度白光LED开关以及自动调光和故障自诊断报警.该系统具有传输距离远、响应速度快、操作简便、性价比高、工作稳定、可靠性高等优点.  相似文献   

Dissolved oxygen sensor based on sol-gel matrix doped with tris(2,2’-bipyridine)ruthenium dichloride     

XIONG Xiao-li  TANG Yan  ZHENG Bao-zhan 《重庆大学学报(英文版)》2013,12(1):11-15

To establish a immobilization method of oxygen sensitive dye, a dissolved oxygen sensor based on a sol-gel matrix doped with ruthenium complex ([Ru(bpy)3]2+) as the oxygen-sensitive material is reported. The results indicate that the I0 /I100 value of the [Ru(bpy)3]2+-doped in tetraethylorthosilane (TEOS) composite films are estimated to be 10.6, where I0 and I100 correspond to the detected fluorescence intensities in pure nitrogen saturated water and pure oxygen saturated water, respectively. Also, the Stern-Volmer plot shows a very good linearity at low dissolved oxygen concentrations. The response time of the composite films is 5 s upon switching from nitrogen saturated water to oxygen saturated water and 10 s from oxygen saturated water to nitrogen saturated water. The dissolved oxygen sensors based on the ruthenium complex/TEOS composite films exhibit greater sensitivity, stability and faster response time as compared to the existing ones. Furthermore, the thin films possess greatly minimized dye leaching effect.  相似文献   

具有脉冲药物治疗的乙肝病毒感染模型周期解的存在性与稳定性     

龙敏  周铁军 《娄底师专学报》2013,(2):45-47,124

讨论了一个具有脉冲药物治疗的乙肝病毒感染模型周期解的存在性与稳定性的问题,利用脉冲微分方程理论获得了一个无病周期解,并通过Floquet乘子定理证明了系统无病周期解全局渐近稳定的条件。  相似文献   

高频脉冲电源参数对 Fe-ZrO2复合电沉积镀层纳米含量的影响     

闫帅  王元刚  宁智 《大连大学学报》2013,(6):6-8

为改善低温镀铁工艺镀层的耐磨损耐腐蚀性能,提高镀层表面硬度,以GKDM系列高频脉冲电镀电源为实验复合电沉积工艺电源并配合超声．机械搅拌制备纳米Fe-ZrO2镀层。研究了高频脉冲电源参数：峰值电流导通（TON）、关闭（TOFF）时间;一组正脉冲（TF）负脉冲（TR）的工作时间对镀层表面纳米含量的影响。结果表明当GKDM系列高频脉冲电源TON=20×0．1ms,TOFF=80×0．1ms时,纳米沉积分布均匀致密,质量分数高。  相似文献   

The effect of beetroot juice supplementation on repeat-sprint performance in hypoxia     

Georgina L. Kent  Brian Dawson  Lars R. McNaughton  Gregory R. Cox  Louise M. Burke  Peter Peeling 《Journal of sports sciences》2019,37(3):339-346

This investigation assessed the effect of dietary nitrate (NO₃^?) supplementation, in the form of beetroot juice (BR), on repeat-sprint performance in normoxia and normobaric hypoxia. 12 male team-sport athletes (age 22.3 ± 2.6 y, VO_2peak 53.1 ± 8.7 mL.kg^?1.min^?1) completed three exercise trials involving a 10 min submaximal warm-up and 4 sets of cycling repeat-sprint efforts (RSE; 9 × 4 s) at sea level (CON), or at 3000 m simulated altitude following acute supplementation (140 mL) with BR (HYP_BR; 13 mmol NO₃^?) or NO₃^–depleted BR placebo (HYP_PLA). Peak (PPO) and mean (MPO) power output, plus work decrement were recorded during the RSE task, while oxygen consumption (VO₂) was measured during the warm-up. There were no significant differences observed between HYP_BR and HYP_PLA for PPO or MPO; however, work decrement was reduced in the first RSE set in HYP_BR compared with HYP_PLA. There was a moderate effect for VO₂ to be lower following BR at the end of the 10 min warm-up (ES = 0.50 ± 0.51). Dietary NO₃^? may not improve repeat-sprint performance in hypoxia but may reduce VO₂ during submaximal exercise. Therefore, BR supplementation may be more effective for performance improvement during predominantly aerobic exercise.  相似文献   

NiCo_2O_4纳米结构阵列的水热合成与氧析出特性研究     

陈传胜  张作胜  陈伟杰  乔浏 《安徽职业技术学院学报》2020,(1):16-19,41

钴酸镍纳米材料具有良好的电催化氧析出反应(Oxygen Evolution Reaction,OER)活性,是一种很有发展潜力的非贵金属电催化材料。文章以碳纤维纸为基底,采用水热合成的方法对纳米结构钴酸镍的生长进行了系统的研究,分别考察了生长温度、前驱体浓度和配比、生长时间对产物的形貌、尺寸、物相结构、OER电化学性能的影响,通过对比分析后发现在生长温度100℃、生长时间5h、镍钴比为2:1时所获得的多孔片状钴酸镍纳米结构具有最佳的OER特性。  相似文献   

3-min all-out effort on cycle ergometer is valid to estimate the anaerobic capacity by measurement of blood lactate and excess post-exercise oxygen consumption     

Alessandro Moura Zagatto  Paulo Eduardo Redkva  Rodrigo Araújo Bonetti de Poli  Joel Abraham Martinez González  Jeniffer Zanetti Brandani  Thiago Penedo 《European Journal of Sport Science》2019,19(5):645-652

The purpose of this study was to investigate the use of a single 3-min all-out maximal effort to estimate anaerobic capacity (AC) through the lactate and excess post-exercise oxygen consumption (EPOC) response methods (AC_{[La^?]+EPOCfast}) on a cycle ergometer. Eleven physically active men (age?=?28.1?±?4.0?yrs, height?=?175.1?±?4.2?cm, body mass?=?74.8?±?11.9?kg and ?O_2max?=?40.7?±?7.3?mL?kg^?1?min^?1), participated in the study and performed: i) five submaximal efforts, ii) a supramaximal effort at 115% of intensity of ?O_2max, and iii) a 3-min all-out maximal effort. Anaerobic capacity was estimated using the supramaximal effort through conventional maximal accumulated oxygen deficit (MAOD) and also through the sum of oxygen equivalents from the glycolytic (fast component of excess post-exercise oxygen consumption) and phosphagen pathways (blood lactate accumulation) (AC_{[La^?]+EPOCfast}), while during the 3-min all-out maximal effort the anaerobic capacity was estimated using the AC_{[La^?]+EPOCfast} procedure. There were no significant differences between the three methods (p?>?0.05). Additionally, the anaerobic capacity estimated during the 3-min all-out effort was significantly correlated with the MAOD (r?=?0.74; p?=?0.009) and AC_{[La^?]+EPOCfast} methods (r?=?0.65; p?=?0.029). Therefore, it is possible to conclude that the 3-min all-out effort is valid to estimate anaerobic capacity in physically active men during a single cycle ergometer effort.  相似文献