上海女子气手枪运动员击发和收枪时脑电相干性分析          下载免费PDF全文

安燕  郑樊慧 《体育科研》2016,(6):83-87

通过脑电相干性分析,探讨运动员射击中击发和收枪两种不同运动表现时各脑区间的沟通差异。采用64导脑电测试系统记录12名女子气手枪运动员击发与收枪时的脑电,将两种不同表现击发前的脑电分为4个时间段（每段1 000 ms）,分别计算低-alpha频段（8~10 Hz）、高-alpha频段（11~13 Hz）、低-beta频段（14~22 Hz ）中前额区（Fz）与其他脑区间(额区、中央区、顶区、枕区和颞区)的相干性。结果发现,在低-alpha频段,与收枪时相比,运动员击发时大脑信息沟通较少,表明击发时运动员只需要较低的皮层唤醒和注意努力。左脑脑波相干性显著低于右脑,表明大脑半球不同功能体现在了运动员射击过程中,运动员射击时右半球交流多,注意力转移以视觉空间为主。不同表现过程中不同时间点显示了不同高低的脑波相干性,故推断稳定的大脑皮质活动与较好的运动表现有关。  相似文献   

少儿初学者的新型游泳背漂的设计与应用          下载免费PDF全文

姜欣  陆阿明  王红金 《体育科研》2016,(6):97-100

针对现有背漂舒适度差、阻力大、易上滑的缺点,意在改良和设计一款新型背漂--鳍翼。采用观察法、问卷调查法、实验法,运用流体力学、运动生物力学原理,对新型背漂进行调查和实验研究。调查结果显示,与现有背漂相比,新型背漂舒适度良好。实验结果显示,与现有背漂相比,新型背漂出现系带滑落的次数、背漂上滑距离明显较少（P＜0.05）,且在25 m蛙泳腿测试中,实验组佩戴新型背漂的25 m蛙泳腿游进速度比对照组佩戴原有背漂的游进速度快,并存在显著性差异（P＜0.05）。研究结果表明新型背漂比原有背漂的阻力小,结构更优化,有利于学员更快、更安全地学习游泳,也有利于提高教练的教学效果。  相似文献   

中日“樱花”意象比较研究   总被引：1，自引：0，他引：1  

王相飞 《南京师范大学文学院学报》2007,(2):112-118

将樱花纳入文学与文化的视野加以考察分析，发现中日两国文学作品中的“樱花”意象有各自相对独立的发展轨迹：中国的“樱花”意象是樱桃文学大力发展下的产物；而日本的“樱花”意象则有其自身发展的源头，虽然在演化过程中受到中国文化的影响，但很快又走出了自己的道路，形成自己的民族特色。中日两国诗人对樱桃、樱树和樱花、樱桃花的认识与分类都是模糊的。而两国诗人对此意象的不同处理，又体现了不同的民族审美。  相似文献   

村上春树《1973年的弹子球》主题新释     

王玉华  赵海涛 《长治学院学报》2016,(4):62-65

村上春树的早期小说《1973年的弹子球》多被认为是一部"寻找"主题的小说。在梳理相关研究基础上,本论借助文本细读等手段,认为这部小说的主题并没有仅仅停留在"寻找"之上,而是通过"如何寻找",最终寻找到迷失的本我,让小说人物在进去每一个"入口"后都顺利"寻找"到"出口"的位置。  相似文献   

对课堂教学设计中教学目标阐明的思考   总被引：5，自引：0，他引：5  

王丽华 《现代教育技术》2003,13(6):66-69

教学目标阐明在整个课堂教学设计中占据着很重要的地位。该文在概述教学目标阐明的已有研究后,反思了新的时代背景下教学目标阐明中存在的主要问题,并对此提出了个人的思考。  相似文献   

中学生互联网使用及干预策略研究     

王素然 《廊坊师范学院学报》2006,22(4):101-103

使用自编《中学生互联网使用调查问卷》对某中学学生互联网使用情况进行全面调查,调查结果显示了中学生互联网使用的特点及影响,这些提醒人们必须要对中学生互联网的使用进行积极而适当的干预。  相似文献   

A study of airfoil parameterization,modeling, and optimization based on the computational fluid dynamics method     

Tian-tian Zhang  Wei Huang  Zhen-guo Wang  Li Yan 《浙江大学学报(A卷英文版)》2016,17(8):632-645

An excellent airfoil with a high lift-to-drag ratio may decrease oil consumption and enhance the voyage. Based on NACA 0012, an improved airfoil is explored in this paper. The class/shape function transformation has been proved to be a good method for airfoil parameterization, and in this paper it is modified to improve imitation accuracy. The computational fluid dynamics method is applied to obtain numerically the aerodynamic parameters of the parameterized airfoil, and the result is proved credible by comparison with available experimental data in the open literature. A polynomial-based response surface model and the uniform Latin hypercube sampling method are employed to decrease computational cost. Finally, the nonlinear programming by quadratic Lagrangian method is utilized to modify the multi-island genetic algorithm, which has an improved optimization effect than the method used on its own. The obtained result shows that the modified class/shape function transformation method produces a better imitation of an airfoil in the nose and tail regions than the original method, and that it will satisfy the tolerance zone of the model in a wind tunnel. The response surface model based on the uniform Latin hypercube sampling method gives an accurate prediction of the lift-to-drag ratio with changes in the design variables. The numerical result of the flow around the airfoil shows reasonable agreement with the experimental data graphically and quantitatively. Ultimately, an airfoil with better capacity than the original one is acquired using the multi-island genetic algorithm based nonlinear programming by quadratic Lagrangian optimization method. The pressure contours and lift-to-drag ratio along with the attack angle have been compared with those of the original airfoil, and the results demonstrate the strength of the optimized airfoil. The process for exploring an improved airfoil through parameterization to optimization is worth referencing in future work.  相似文献   

研究性学习在课程中的开展--以《中央银行理论与实务》为例     

王传宝 《宁波广播电视大学学报》2005,3(3):53-55

本文以《中央银行理论与实务》为例，对我们在课程中开展研究性学习的实践与探索进行了总结归纳。作者提出应通过加强教学过程中的互动、选择有效的自主学习指导方式、开展专题研究活动、注重素质拓展等，促进研究性学习的开展，保证研究性学习的效果。  相似文献   

An extended version of the theory of planned behaviour: the role of self-efficacy and past behaviour in predicting the physical activity of Chinese adolescents     

Lijuan Wang  Ying Zhang 《Journal of sports sciences》2016,34(7):587-597

This study aimed to use an extended theory of planned behaviour (TPB), which incorporated additional self-efficacy and past behaviour, to predict the intention to engage in moderate-to-vigorous physical activity (MVPA) and the MVPA level of Chinese adolescents. Questionnaires that focused on MVPA, attitude, subjective norm, perceived behavioural control (PBC), self-efficacy and past behaviour related to the MVPA engagement were administered to a sample of 488 young people. Multiple regression analyses provided moderate support for TPB. Three TPB constructs predicted 28.7% of the variance in intentions to engage in MVPA, and that PBC, but not intention, explained 3.4% of the variance in MVPA. Self-efficacy significantly affected intention and behaviour over and above the influence of TPB. Past behaviour had a small but significant improvement in the prediction of intention, but no improvement in the prediction of MVPA. Based on the results, interventions should target adolescent self-efficacy and PBC in physical activity participation.  相似文献   

天启年间宫女休闲活动考          下载免费PDF全文

杨红  殷姿 《体育科研》2016,(1):85-87，92

本文主要采用历史文献法,以明宫词为主,明史及明代野史杂记为辅,考辨明代天启年间,后宫不同地位的宫女平日里的休闲活动。宫女游戏是女性体育的组成部分,笔者在大量文献中发现了些许新材料,以期填补女性体育史中的空白。  相似文献