在高校体育教学中开设拓展训练课程的研究

采用问卷调查法和教学实验法，对拓展训练课程在高校体育教学中的实践进行了研究。教学实践表明，拓展训练通过认知活动、情感活动、意志活动和交往活动等，能更好地发掘参与者的自身潜能，认识群体的作用，启发想象力和创造力，改善人际关系等。在高校体育教学中具有极好的发展前景。     

电子政务外网平台信息资源构建研究

本文就当前我国快速发展电子政务,各地都在或已建立电子政务外网平台的新形势下,如何构建信息资源、做好信息资源开发做了较系统的研究。     

Motion information analysis system based on acceleration signals

A motion information analysis system based on the acceleration data is proposed in this paper,consisting of filtering,feature extraction and classification.The Kalman filter is adopted to eliminate the noise.With the time-domain and frequency-domain analysis,acceleration features like the amplitude,the period and the acceleration region values are obtained.Furthermore,the accuracy of the motion classification is improved by using the k-nearest neighbor （KNN） algorithm.     

潜在震源区范围的不确定性对地震危险性分析结果的影响规律

通过地震危险性概率分析计算,认为只有当潜在震源区中心眯离场点距离（Ｒ）很近时,潜在震源区面积减小,地震烈度、地震动值加速度越大;反之人相反,并且当Ｒ〉４０ｋｍ时,潜在震源区范围不确定性对地震度,地震动峰值和加速度的影响搬小;不令地区或地震强度如何,潜在震源区范围的不确定性对地震烈度或地震动峰值加速度的影响规律相似;相比较而言,这种不确定性对地震动峰值国速度的影响较对地震烈度的影响要大。     

Comparison of step-by-step kinematics of resisted,assisted and unloaded 20-m sprint runs

This investigation examined step-by-step kinematics of sprint running acceleration. Using a randomised counterbalanced approach, 37 female team handball players (age 17.8 ± 1.6 years, body mass 69.6 ± 9.1 kg, height 1.74 ± 0.06 m) performed resisted, assisted and unloaded 20-m sprints within a single session. 20-m sprint times and step velocity, as well as step length, step frequency, contact and flight times of each step were evaluated for each condition with a laser gun and an infrared mat. Almost all measured parameters were altered for each step under the resisted and assisted sprint conditions (η² ≥ 0.28). The exception was step frequency, which did not differ between assisted and normal sprints. Contact time, flight time and step frequency at almost each step were different between ‘fast’ vs. ‘slow’ sub-groups (η² ≥ 0.22). Nevertheless overall both groups responded similarly to the respective sprint conditions. No significant differences in step length were observed between groups for the respective condition. It is possible that continued exposure to assisted sprinting might allow the female team-sports players studied to adapt their coordination to the ‘over-speed’ condition and increase step frequency. It is notable that step-by-step kinematics in these sprints were easy to obtain using relatively inexpensive equipment with possibilities of direct feedback.     

素质教育下高职院校实施拓展训练的理论探索

拓展训练是一种现代人和现代组织挑战自我、熔炼团队的全新的学习方法和训练方式。如何把这种行之有效的素质培养的方法引进高校教育教学体系特别是体育课程体系以实施素质教育,成为一个意义重大而富有创造性的课题。文章以拓展训练内涵的分析为切入点,就高校开设拓展训练课的实施原则和理论基础以及可行性作了初步的理论探讨。     

排球正面扣球两种挥臂动作分析

对国内外女子排球名将的两种扣球挥臂动作进行了统计分析,明确了两种挥臂动作的特点、效能和作用的异同。对中国女排两种典型挥臂动作进行了摄影与解析。分析认为两种扣球方式均为优秀的扣球动作,可在不同条件下,发挥其独特的效能。故训练时应根据运动员的各自条件,因人而异地施训。     

Effects of unsteady conditions on propulsion generated by the hand’s motion in swimming: a systematic review

The understanding of swimming propulsion is a key factor in the improvement of performance in this sport. Propulsive forces have been quantified under steady conditions since the 1970s, but actual swimming involves unsteady conditions. Thus, the purpose of the present article was to review the effects of unsteady conditions on swimming propulsion based on studies that have compared steady and unsteady conditions while exploring their methods, their limitations and their results, as well as encouraging new studies based on the findings of this systematic review. A multiple database search was performed, and only those studies that met all eligibility criteria were included. Six studies that compared steady and unsteady conditions using physical experiments or numerical simulations were selected. The selected studies verified the effects of one or more factors that characterise a condition as unsteady on the propulsive forces. Consequently, much research is necessary to understand the effect of each individual variable that characterises a condition as unsteady on swimming propulsion, as well as the effects of these variables as a whole on swimming propulsion.     

场地自行车1km竞速加速度与踝关节等速运动及屈伸肌群肌电参数关系

目的:研究1 km自行车竞速赛加速度与踝关节肌肉力学特征之间的关系,更好地为自行车局部力量训练提供理论基础。方法:选择6名青少年自行车运动员进行1 km场地自行车竞速、等速运动、表面肌电图测试,对实验数据进行相关、主因素及回归分析等统计学处理。结果:1)作Friedman秩次分析不同角度下EPT、FPP、EAP、FAP、EDLM、GM及EDLM/EPT、GM/FPT差异显著(P<0.05),因子分析得2个主因素;2)AA1与1 km成绩,EPT,EAP、FAP及60°/s、90°/s下EDLM显著相关(P<0.05);3)以AA1为因变量经三步多元回归得到3个自变量,分别是EAP120°/s,EPT120°/s,EPT90°/s。结论:1)第1圈平均加速度与1 km成绩、踝关节伸屈肌EPT、EAP、FAP及60°/s、90°/s下伸肌iEMG高度相关;2)自行车运动员踝关节伸屈肌素质可以归纳至两个主要成分,第一是伸肌肌群的提拉作用,第二是伸屈肌肌群平均功率及相互协调作用;3)以踝关节周围肌肉群素质概括首圈加速度,90°/s、120°/s角速度模式下伸肌做功及力矩是重要决定指标,在自行车的训练中应该注重伸肌素质...     

论高职院校体育教学中开设拓展训练的必要性和可行性

运用文献资料法、比较研究法等方法,阐述拓展训练的起源与发展,论述高职院校开设拓展训练的必要性和可行性,分析开展引入拓展训练时应注意的问题,为进一步在高职院校中开展拓展训练参考。