艺术体操不稳定平衡旋转训练仪的研制   总被引：3，自引：0，他引：3  

李世明  郭荣  金季春 《山东体育科技》2004,26(1):82-83

艺术体操运动员在转体过程中要保持身体平衡就要调整身体姿态，尽可能地使人体转动轴始终通过人体总重心且垂直于支撑面。我们根据这一原理，研制了不稳定平衡旋转训练仪。它采用机械的手段，给运动员提供了一个更加不稳定平衡的转体环境，可以提高运动员在转体过程中维持身体平衡的能力。  相似文献   

Spatial Discovery of Linked Research Datasets and Documents at a Spatially Enabled Research Library     

Sara Lafia  Werner Kuhn 《Journal of Map & Geography Libraries》2018,14(1):21-39

Current publishing practices in academia tend to result in datasets that are difficult to discover. This is because datasets are not well-integrated across academic domains and they are often not linked to the documents that reference them. For these reasons, discovering datasets across domains can be challenging; for example, discovering archeological observations and biological specimens using the same search is not widely supported, even if both datasets share a similar spatial extent, like Mesoamerica. It is also challenging to retrieve relevant documents that reference datasets; for example, retrieving a series of field reports that reference archeological observations is typically not supported. Our work develops an extensible method for: (1) geographically integrating collections across disciplinary repositories and (2) connecting datasets to related documents. We describe a collection of spatially-referenced researcher datasets, capturing their metadata elements and encoding them as linked open data. We then leverage existing library services to formalize links from datasets to documents. The system described in this work has been deployed, resulting in an experimental open data site for the UCSB campus. Results indicate that this system can be scaled-up with support from an institutional repository in the near future.  相似文献   

基于LBS&GIS的旅游资源普查、评价与可视化系统   总被引：1，自引：0，他引：1  

李鹏  王英杰  虞虎  马楠 《中国科学院大学学报》2017,34(6):692-700

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Guiding Low Spatial Ability Individuals through Visual Cueing: The Dual Importance of Where and When to Look     

Victoria A. Roach  Graham M. Fraser  James H. Kryklywy  Derek G.V. Mitchell  Timothy D. Wilson 《Anatomical sciences education》2019,12(1):32-42

Research suggests that spatial ability may predict success in complex disciplines including anatomy, where mastery requires a firm understanding of the intricate relationships occurring along the course of veins, arteries, and nerves, as they traverse through and around bones, muscles, and organs. Debate exists on the malleability of spatial ability, and some suggest that spatial ability can be enhanced through training. It is hypothesized that spatial ability can be trained in low-performing individuals through visual guidance. To address this, training was completed through a visual guidance protocol. This protocol was based on eye-movement patterns of high-performing individuals, collected via eye-tracking as they completed an Electronic Mental Rotations Test (EMRT). The effects of guidance were evaluated using 33 individuals with low mental rotation ability, in a counterbalanced crossover design. Individuals were placed in one of two treatment groups (late or early guidance) and completed both a guided, and an unguided EMRT. A third group (no guidance/control) completed two unguided EMRTs. All groups demonstrated an increase in EMRT scores on their second test (P < 0.001); however, an interaction was observed between treatment and test iteration (P = 0.024). The effect of guidance on scores was contingent on when the guidance was applied. When guidance was applied early, scores were significantly greater than expected (P = 0.028). These findings suggest that by guiding individuals with low mental rotation ability “where” to look early in training, better search approaches may be adopted, yielding improvements in spatial reasoning scores. It is proposed that visual guidance may be applied in spatial fields, such as STEMM (science, technology, engineering, mathematics and medicine), surgery, and anatomy to improve student's interpretation of visual content. Anat Sci Educ. © 2018 American Association of Anatomists.  相似文献   

认知负荷对乒乓球运动员注意空间的影响*     

杨〓义  岳珍珠 《广州体育学院学报》2019,(2):99-101

目的 同时注意空间中多个目标刺激对于乒乓球运动员非常重要。考察认知负荷对青少年乒乓球运动员注意分布的影响。方法：实验中采用计算机行为实验，控制认知负荷（同时注意的目标数量为2、4或6个），并且在不同注意范围（离中央注视点3°、6°和9°视角）的位置上同时呈现刺激，要求被试对刺激的亮度变化做辨别反应。结果：:认知负荷对于乒乓球运动员的注意范围有显著调节。当刺激个数为2时，在3°和6°视角条件下呈现的刺激反应时均显著快于9°视角条件下的刺激。当刺激个数为4时，视角为3°条件下的反应时快于视角为6°和9°时的反应时，而视角为6°时又比视角为9°时的反应时显著要快。当刺激个数为6时，视角为3°时的反应时均快于视角为6°和9°时的反应时。结论：当前研究证明随着认知负荷增加，乒乓球运动员注意焦点范围显著缩小。可以通过测量运动员在高负荷条件下注意焦点的范围来进行运动员的选拔。  相似文献   

Libraries and Spatial Literacy: Toward Next-Generation Education     

Benjamin D. Branch 《College & Undergraduate Libraries》2014,21(1):109-114

The role of the library is to assist citizens in skills development critical to national interest and empowerment as literacy ambassadors, in general. Specifically, the work by the Federal Geographic Data Committee (1994) indicates that spatial literacy is for every citizen and not just a set of workforce specialists. Hence, the use of maps in decision making and problem solving will become fundamental to all professions, including library professionals. Thus, a spatial literacy awareness and rationale for such as standard job ability is discussed as a future librarian workforce proficiency and knowledge transfer medium.  相似文献   

Spatial Planning and its Need for National and Regional Bibliographies of Grey Literature     

Christian Erlinger 《Cataloging & classification quarterly》2019,57(1):59-72

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基于微博数据的中原城市群空间联系强度测度   总被引：1，自引：0，他引：1  

王开泳  邓羽 《中国科学院大学学报》2016,33(6):775-782

空间联系强度是城市群发展阶段、态势、功能定位的重要表征.在大数据背景下，随着移动终端的普及和网络联系平台的广泛使用，人流在不同地区的空间移动能够得到较准确的统计和表达.在总结以往城市群空间联系研究方法的基础上，提出一种新的基于微博数据判别城市之间空间联系强度的方法，弥补了由于缺乏城际通勤数据而导致的传统空间联系强度判别方法的不足.新方法可以较准确地判别城市群地区各个城市的空间联系强度与组织类型.  相似文献   

论连结热力学过程两态的任意性     

尹建民 《嘉应学院学报》2007,25(6):19-22

所谓连结两态热力学过程的任意性,指的是连系确定的始、终两态的可能热力学过程有无穷多,包括了各种可能的做功和吸热特性的过程,当然违反热力学第一定律的过程除外。因此,给定了始、终态后对连系它们的过程的做功和吸热的特性不可能作任何判断。  相似文献   

中国教育支出与经济增长的空间实证分析   总被引：12，自引：2，他引：12  

顾佳峰 《教育与经济》2007,(1):29-33

本文使用空间计量经济学方法,分析2000年中国各县教育经费支出情况,发现教育经费支出对GDP、地方财政支出和城乡居民储蓄存款余额的弹性较弱,都小于1,因此,瓦格纳法则不适用。在经济高速增长情况下,这种弱弹性限制了“4%”目标的实现。所以,当前除了要关心教育经费短缺问题,更要关心教育经费使用的低效问题。要积极探索提高既定教育投入的产出效率和效益,通过良好而科学的教育产出管理,节约教育投入,提高办学效益,以缓解现有教育投入不足的压力。  相似文献