高校网球教学中学生网球兴趣的培养和提高     

马腾 《体育科技文献通报》2020,(2):48-48,52

网球是一项非常有益身心健康的运动,可以帮助人们提高自身的运动能力、增强体质,很多高校开设了网球课程。如何提高学生对网球的兴趣,使其积极参与到网球课程中来成为了高校网球教学面临的主要难题。对此,笔者从高校当前的网球教学现状出发,为提高学生网球兴趣提出相应的建议。  相似文献   

科技论文引用对象研究综述     

马娜  张智雄  于改红 《图书情报工作》2019,63(23):139-145

[目的/意义] 为更好地提升基于内容的引文分析效果，对国内外引用对象相关研究进行调研总结，为引用内容分析研究提供借鉴。[方法/过程] 通过调研国内外引用对象相关研究，梳理引用对象的概念定义、分类体系、应用领域和自动化识别等方面研究进展，总结当前引用对象研究不足并提出未来发展方向。[结果/结论] 引用对象从语义层面评价文献学术研究的贡献和利用价值，为引文分析方法增加了重要维度。引用对象研究需要从理论、技术和应用三个方向进行深化：理论上，加强多维度引用对象特征的研究和分析；技术上，探索基于大规模语料的自动化识别方法；应用上，尝试基于引用对象的科研评价服务。  相似文献   

政务B站号信息传播效果影响因素与实证研究     

陈强  张杨一  马晓悦  曾润喜 《图书情报工作》2020,64(22):126-134

[目的/意义] 作为政府与青年群体沟通的重要平台，政务Bilibili账号的信息传播效果直接决定其沟通效率和效果。对政务Bilibili账号信息传播效果影响因素的研究有利于沟通效果的提升。[方法/过程] 本研究基于共青团中央Bilibili账号的471个样本，采用内容分析和回归分析等系统考察内容主题、视频类别、封面图类型、屏幕形式、字幕、组织形式、剪辑率和视频时长等因素对政务Bilibili账号信息传播效果的影响。[结果/结论] 结果表明，科技类、音乐类和时尚类主题的视频能够提升整体传播效果，科技类视频的贡献度最高；情景剧、实拍视频和监控视频都正向显著影响整体传播效果，实拍视频的贡献度最高。视频剪辑率、竖屏视频、字幕添加、合作创作等均能显著提高整体传播效果，竖屏在整体传播效果模型中的贡献度最大。视频时长和封面图的作用不显著。政务Bilibili账号运营应充分释放青年的爱国势能、创新视频形式、优化视频制作流程、创新组织形式。  相似文献   

Increased foot-stretcher height improves rowing performance: evidence from biomechanical perspectives on water     

Yang Liu  Binghong Gao  Jiru Li  Zuchang Ma  Yining Sun 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(2):168-179

Abstract

The aim of this study was to investigate whether changes on foot-stretcher height were associated with characteristics of better rowing performance. Ten male rowers performed a 200 m rowing trial at their racing rate at each of three foot-stretcher heights. A single scull was equipped with an accelerometer to collect boat acceleration, an impeller with embedded magnets to collect boat speed, specially designed gate sensors to collect gate force and angle, and a compact string potentiometer to collect leg drive length. All sensor signals were sampled at 50 Hz. A one-way repeated measures ANOVA showed that raising foot-stretcher position had a significant reduction on total gate angle and leg drive length. However, a raised foot-stretcher position had a deeper negative peak of boat acceleration at the catch, a lower boat fluctuation, a faster leg drive speed, a larger gate force for the port and starboard side separately. This could be attributed to the optimisation of the magnitude and direction of the foot force with a raised foot-stretcher position. Although there was a significant negative influence of a raised foot-stretcher position on two kinematic variables, biomechanical evidence suggested that a raised foot-stretcher position could contribute to the improvement of rowing performance.  相似文献   

Digital Module 05: Diagnostic Measurement—The G‐DINA Framework https://ncme.elevate.commpartners.com     

Wenchao Ma  Jimmy de la Torre 《Educational Measurement》2019,38(2):114-115

In this ITEMS module, we introduce the generalized deterministic inputs, noisy “and” gate (G‐DINA) model, which is a general framework for specifying, estimating, and evaluating a wide variety of cognitive diagnosis models. The module contains a nontechnical introduction to diagnostic measurement, an introductory overview of the G‐DINA model, as well as common special cases, and a review of model‐data fit evaluation practices within this framework. We use the flexible GDINA R package, which is available for free within the R environment and provides a user‐friendly graphical interface in addition to the code‐driven layer. The digital module also contains videos of worked examples, solutions to data activity questions, curated resources, a glossary, and quizzes with diagnostic feedback.  相似文献   

公众参与视域下公共档案馆微信平台互动研究     

马志颖 《兰台世界》2020,(4):42-45

公众参与是衡量现代民主政治发展的重要指标,公共机构与社会公众双方良性互动显得至关重要。从档案微信公众平台建设上看,存在公众参与地域不均、公众参与程度不高、档案部门回应力度不够、微信公号吸引性不足的问题。提出应加强档案宣传教育,转变档案部门服务意识,提高公号内容质量和拓宽互动形式等建议,以期提高双方互动效率,实现档案服务质量和档案价值的提升。  相似文献   

Simultaneous changes in seed size,oil content and protein content driven by selection of SWEET homologues during soybean domestication     

Shoudong Wang  Shulin Liu  Jie Wang  Kengo Yokosho  Bin Zhou  Ya-Chi Yu  Zhi Liu  Wolf B Frommer  Jian Feng Ma  Li-Qing Chen  Yuefeng Guan  Huixia Shou  Zhixi Tian 《国家科学评论(英文版)》2020,7(11):1776

Soybean accounts for more than half of the global production of oilseed and more than a quarter of the protein used globally for human food and animal feed. Soybean domestication involved parallel increases in seed size and oil content, and a concomitant decrease in protein content. However, science has not yet discovered whether these effects were due to selective pressure on a single gene or multiple genes. Here, re-sequencing data from >800 genotypes revealed a strong selection during soybean domestication on GmSWEET10a. The selection of GmSWEET10a conferred simultaneous increases in soybean-seed size and oil content as well as a reduction in the protein content. The result was validated using both near-isogenic lines carrying substitution of haplotype chromosomal segments and transgenic soybeans. Moreover, GmSWEET10b was found to be functionally redundant with its homologue GmSWEET10a and to be undergoing selection in current breeding, leading the the elite allele GmSWEET10b, a potential target for present-day soybean breeding. Both GmSWEET10a and GmSWEET10b were shown to transport sucrose and hexose, contributing to sugar allocation from seed coat to embryo, which consequently determines oil and protein contents and seed size in soybean. We conclude that past selection of optimal GmSWEET10a alleles drove the initial domestication of multiple soybean-seed traits and that targeted selection of the elite allele GmSWEET10b may further improve the yield and seed quality of modern soybean cultivars.  相似文献   

论幼儿创造性人格及其培养     

马雪琴  马富成 《河西学院学报》2011,27(1):110-112,40

培养具有创造性的人一直是教育的主要目标。幼儿期是个体身心迅速发展的时期,也是幼儿创造性人格发展和培养的关键期。本文在概述幼儿创造人格结构的基础上,提出了培养幼儿创造性人格的六条途径:一是保护和巩固幼儿的好奇心、求知欲;二是为幼儿营造良好、安全的环境;三是培养幼儿的独立性和自信心;四是培养幼儿形成良好的意志力;五是培养幼儿的新异性和敏感性;六是培养幼儿学会与他人合作。  相似文献   

当前幼儿园园本教研存在的问题及对策     

马富成  马雪琴 《河西学院学报》2011,27(6):82-85

随着我国幼儿园课程改革的深入和对教师专业发展水平要求的不断提高,园本教研被认为是当前幼儿园提高保教质量、促进教师专业发展的有效途径。但是当前幼儿园开展园本教研的过程中存在诸多问题,如园本教研与促进全体教师专业发展、提高园所保教活动质量相脱节;园本教研活动没有针对全体教师及教师的个性化需求;教师开展园本教研的评价机制不完善;园本教研制度亟需完善和落实等。真正有效的园本教研应该以促进全体教师专业发展及保教活动质量的提高为目的,应构建分层研修的园本教研共同体,完善开展园本教研的评价机制,提高领导和教师对园本教研重要性的认识,完善和落实园本教研制度。  相似文献   

教学评估量规的编制及应用     

唐玉霞  马兰 《远程教育杂志》2011,29(6):88-93

量规本质上是一套标准或准则,它包含了评价准则、等级标准和具体说明三个基本要素,旨在创设一个连续体来说明特定主题在不同层次上的知识和技能状况。教育心理学研究与课程改革研究专家均极力倡导采用不同的量规编制方式。通过确定难度不同的学习目标、设计一般性量规和用学生易于接受的形式改写量规的三个步骤,可以编制出一个严格的量规来弥补百分制分数体系在评价中的弊端。此外,教师不仅可以借助量规来设计各种评估并进行评分,并将各种评估转化成量规形式加以解释,还可以从量规的角度帮助学生制定学习进展图,促进他们的学习。  相似文献