手枪速射运动员4 s射击节奏研究简

利用高速摄像机对4名优秀男子手枪速射运动员4s组射击进行现场动作拍摄,同时采用秒表记录各动作时相时间,通过对动作录像和秒表采集时间的分析,来揭示4s射击的时间节奏特点.将4s组射击的动作阶段划分为五个时相：举枪至第1靶击发、第1靶至第2靶、第2靶至第3靶、第3靶至第4靶、第4靶至第5靶.研究发现：4s组每发子弹击发所用帧数为5～6帧（频率为63帧/s）,发与发之间间隔帧数间隔帧数在26～38帧,大多数在28～34帧之间;举枪到第1发枪响,时间都在1.4～1.7 s之间,发与发之间的时间间隔在0.4～0.6 s范围内.对于男子手枪速射项目的节奏研究,高速摄像是一种精确、可靠的研究手段.     

英语四级网考对英语视听说课程的新要求

在国家教育部颁布的教学《要求》及《全国大学生四、六级考试改革方案（试行）》的要求下,作者从大学英语视听说课程的角度出发,调整教学任务,为适应四级网考对视听说课程做出教学改革以培养具有较强口语表达能力的综合性人才。利用当下新兴的网络及多媒体教学平台,加强学生的网络自主学习能力,使构建主义和计算机信息技术相结合,建立新的视听说自主学习模式。     

EH-4电磁成像系统在热储构造勘查中的应用研究

莫撼.EH4 电磁系统的近源效应及其校正方法[J].物探与化探,2000,24(4):512.

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浅谈3G技术

随着移动通信网络技术的发展,3G成为历史发展的大趋势,对于3G技术的应用也在不断的讨论和深化中。现以3G技术三种标准、R99及R4版本的发展,深入浅出地探讨3G技术。     

The happy-fish-little-pond effect on enjoyment: Generalizability across multiple domains and countries

Academic enjoyment is an important educational construct given that it benefits students' engagement, persistence, wellbeing, and mental health. In this study, we examine two factors that determine this crucial emotion, namely student- and class-level achievement. Past research has been restricted to single-country or single-domain examinations of secondary school students, limiting generalizability of findings. To bridge this gap, we utilize the Trends in International Mathematics and Science Study and the Progress in International Reading Literacy Study (TIMSS-PIRLS) combined 2011 data (N = 180,084 4th-grade students, 37 countries). Our results provide robust evidence that student-level achievement positively predicts enjoyment in math, science, and reading, while the effects of class-level achievement are negative—the Happy-Fish-Little-Pond Effect. These results showed relative universality across the domains and countries examined.     

Thomas Tryon,Sheep and the Politics of Eden

The English writer Thomas Tryon (1634–1703) believed that sheep were survivors from the original earthly paradise, and that as morally perfect beings they could serve as role models for humans. Tryon advocated vegetarianism, pacifism and an end to slavery as it was practiced in the Caribbean. He was an ambitious and influential reformer on several fronts, but the restoration of Eden was his ultimate goal. Tryon celebrated sheep-like meekness, a stance that complicated his reform efforts. His agenda and sheep-inspired persuasive strategy reflect the momentous intellectual and moral ferment surrounding human relations with animals in the seventeenth century.     

A study of social–emotional adjustment levels of preschool children in relation to peer relationships

The aim of this research is to study social–emotional adaptation levels of 5- to 6-year old preschool children in relation to peer relationships. One hundred and forty-four children aged between 5 and 6 joined in this relational survey study. According to the results of the research analysing the relationship between the social–emotional adjustments of 5- to 6-year old children continuing preschool education and the peer relationship variables; the social–emotional adjustment level can meaningfully predict the prosocial behaviour of children towards their peers, aggression levels and exclusion by peers, fear–anxiety towards peers, hyperactivity–distractibility and peer victimisation.     

尖晶石型复合氧化物MAl_2O_4（M=Sr,Ba）的制备、表征及可见光催化性能研究

用柠檬酸络合法制备了尖晶石型复合氧化物SrAl2O4、BaAl2O4,用XRD、TEM等手段对催化剂结构和性能进行了表征,并考察了其在可见光下降解刚果红的催化性能。结果表明,在可见光条件下,60 min内BaAl2O4使刚果红降解率达80%以上,SrAl2O4降解率大约为70%。SrAl2O4的催化活性低于BaAl2O4可能是由于电子层结构的不同造成的。     

Sc2（WO4）3的高温快速合成及特性研究

首次采用高温快速合成方法成功地将比例适当的Sc2O3和WO3粉末合成了形貌良好的Sc2（WO4）3材料,并对该材料使用了多种手段进行分析。拉曼光谱分析说明在合适工艺参数下高温快速烧结可避免原料挥发,使原料完全参与反应。X射线衍射（XRD）分析表明合成物主要是Sc2（WO4）3材料,属空间群Pnca,具有正交结构,可以呈现负热膨胀特性。扫描电镜（SEM）发现合成物晶粒分散性好,呈链状并互相纠缠在一起。能量散射光谱（EDS）分析显示合成物内部成分分布均匀。     

Universities and government‐sponsored contract research: an Australian case study

Based on interviews, this article provides a case study of the experiences of academic staff at one Australian regional university in undertaking contract research projects sponsored by government departments and agencies. Academics from a surprisingly diverse range of disciplines are attracted to government‐sponsored research for a variety of reasons but particularly important is the financial support provided for research projects and postgraduate research students. Projects vary in scale, amounts of funding involved and purposes, with research activities covering a wide range of different activities including collection and analysis of data, provision of documentation on good practice, design of implementation strategies, evaluations, organisational reviews and policy recommendations. Overall, respondents are highly positive about their experiences, despite problems such as delays in payment of funds, inappropriately restricted timelines, frequent changes in senior agency personnel, unrealistic expectations, and restrictions in the use of data and publication of results. While many academics from different disciplines provide policy recommendations and carry out evaluative studies, few are well informed about the extent to which their work is actually utilised.