The key to success in elite athletes? Explicit and implicit motor learning in youth elite and non-elite soccer players     

L. Verburgh  E. J. A. Scherder  P. A. M. van Lange  J. Oosterlaan 《Journal of sports sciences》2016,34(18):1782-1790

In sports, fast and accurate execution of movements is required. It has been shown that implicitly learned movements might be less vulnerable than explicitly learned movements to stressful and fast changing circumstances that exist at the elite sports level. The present study provides insight in explicit and implicit motor learning in youth soccer players with different expertise levels. Twenty-seven youth elite soccer players and 25 non-elite soccer players (aged 10–12) performed a serial reaction time task (SRTT). In the SRTT, one of the sequences must be learned explicitly, the other was implicitly learned. No main effect of group was found for implicit and explicit learning on mean reaction time (MRT) and accuracy. However, for MRT, an interaction was found between learning condition, learning phase and group. Analyses showed no group effects for the explicit learning condition, but youth elite soccer players showed better learning in the implicit learning condition. In particular, during implicit motor learning youth elite soccer showed faster MRTs in the early learning phase and earlier reached asymptote performance in terms of MRT. Present findings may be important for sports because children with superior implicit learning abilities in early learning phases may be able to learn more (durable) motor skills in a shorter time period as compared to other children.  相似文献   

科技与社会互动关系的历史审视     

蒋美仕  刘业军  雷良 《衡阳师范学院学报》2002,23(4):9-13

历史地、辩证地考察科技与社会的互动关系发现 ,二者的互动过程是一个辩证的否定过程 ,其大致经历了古代科技与农业社会的原始融合、近代科技与工业社会的分离、当代科技与知识社会的全新的全面融合等阶段 ;各阶段特征迥异但又紧密相连 ,从而构成科技与社会互动历史的不可分割的有机整体。  相似文献   

广义正定矩阵的逆与行列式     

杨炳良 《湖州师范学院学报》1992,(6)

在本文中(1)证明了参考文献[2]与[3]中所定义的两类广义正定矩阵的逆仍是同种类型的广义正定矩阵;(2)给出了参考文献[2]中广义正定矩阵的行列式满足如下不等式|A|≤a_(n n)P_(n-1)这里P_(n-1)是A的n-1阶顺序主子式.进一步有|A|≤a_(n n)a_(n-1 n-1)…a_(22)a_(11)  相似文献   

一线式温度传感器(DS1820)序列号的三步法与识别     

艾庆生  王明秋  胡江涛 《郧阳师范高等专科学校学报》2001,21(3):14-17

介绍了DS1820序列号每一位判别的三步法,即求bitm,判断并选择;以此为基础,通过与二叉树及其遍历作比较,确定了序列号识别的存储格式及其定义,最终找到了识别N个DS1820序列号的方法--"前序识别法",并给出程序框图及汇编实现.  相似文献   

基于互动博弈的组织不同层级间激励协同机制设计     

马喜芳  颜世富  钟根元 《软科学》2016,(11):86-90

基于双重委托代理理论,以组织效益最大化为目标,构建了静态纳什均衡模型及动态序贯博弈模型,分析了既定情境下的高低层级群体互动博弈过程及其对策。模型的演绎机制揭示:在提供顶层设计前提下,短期内,组织对高层级群体绩效与奖惩紧密挂钩,将提升组织监管有效性;而组织越过高层级群体对低层级群体加重惩罚是无效的;长期看,无论对高层级群体还是低层级群体,组织必须配有一定程度的负激励,负激励是更为有效和持久的激励。  相似文献   

搜寻理论模型与网络搜寻行为探析   总被引：1，自引：0，他引：1  

叶小梁  李东旻 《情报科学》2006,24(11):1691-1695

本文从信息经济学的角度，从消费者搜寻模型、市场价格离散、消费者预期、搜寻成本等四个方面，针对消费者在购买商品时所进行的搜寻行为进行理论总结，并对该理论在网络搜寻行为等问题上的应用进行初步地探讨。  相似文献   

基于两种算法的天然气管网运行优化技术     

于进  郝小虎  刘四洋  杜炘洁  侯金山  刘支强 《实验室研究与探索》2014,33(10)

为了保证管网能够安全、高效、经济地运行,建立了基于两种优选算法的天然气管网优化模型。在对比了现有各种优化算法的基础上,选用改进线性逼近法和序列二次规划法作为天然气管网运行优化研究的算法,分析了两种算法的原理,并以运行能耗最低为目标进行优化计算研究。为了既能满足生产需求,降低算法本身对目标函数和约束条件的依赖性,又能够保证计算效率和稳定性,优选出序列二次规划法,从生产实际出发建立一套通用性较强的天然气管网稳态运行优化模型,也为软件开发提供前期的数据分析。  相似文献   

橡胶硫化过程的微机分布控制     

蒋征宇  李杰仁  张奋之 《上海海事大学学报》1991,(1)

本文通过具体的实例,介绍了如何确定橡胶硫化过程的工艺参数,如何使用IBM个人计算机和MCS-51单片计算机来组成一个计算机分布控制系统,并把它应用于轮胎硫化过程的时间最优控制。  相似文献   

A Comparative Study of Bone Scan Findings and Serum Levels of Tumor Marker CA15-3 in Patients with Breast Carcinoma     

Meera S. Ghadge  Purva P. Naik  Bijaynath P. Tiwari  Ruprekha M. Hegde  Tanaji J. Matale 《Indian journal of clinical biochemistry : IJCB》2012,27(1):97-99

Breast cancer is one of the most frequent malignancies in the world. Available staging procedures to detect breast cancer are bone scan, chest X-ray, liver ultrasonography, computerized tomography, estimation of tumor markers like carbohydrate antigen (CA15-3) and carcino embryonic antigen. These procedures are expensive and may not be required in all cases. Out of 70 patients studied, 55 had normal CA15-3 and 15 had elevated levels of Ca15-3. Eight (14.5%) of the 55 patients with normal CA15-3 had abnormal bone scan. Fifteen patients had CA15-3 levels above the normal range and among these 9 (60%) had abnormal bone scan. While prime facie it would appear that a high level of CA15-3 correlate with abnormal bone scan, it is also true that the numbers are small at present and conclusions about the validity of CA15-3 as marker of bone metastasis may be premature.  相似文献   

观国外家政教育，思国内家政教育序列的完善     

吴文前 《成都教育学院学报》2008,22(8):4-8

西方发达国家的家政教育序列已相当完备,中国现代家政教育恢复不久,远未形成阶梯式的家政教育序列,导致个人、社会、企业都遇到现实的困难,逐步构建完善连续的家政教育序列是非常必要而迫切的。开发家政教育校本课程,重视家长对孩子的教育和引导;加强中小学“生活课程”的学习,重视孩子的生存教育;中等家政职业学校教育走城乡结合服务的道路,培养技能型人才;高校家政教育应立足社会,培养实用型人才。以此形成大中小学衔接的正规家政教育体系,与业余教育、大众教育共同构成家政教育网络。  相似文献