新媒体时代电视新闻的创新与发展

在网络技术发展迅猛的背景下,新闻传播方式发生很大变革,新媒体迎来了发展的机遇期。与此同时,传统新闻媒体受到了很大的冲击,面临着严峻的挑战。要想获得可持续发展,必须与时俱进,借助新技术和新优势,不断在内容和形式上进行创新,实现新的发展。本文主要分析了传统电视新闻发展中存在的问题,结合新媒体时代电视新闻的发展趋势分析其创新路径。     

Cyclic-anion salt for high-voltage stable potassium-metal batteriesOA

Electrolyte anions are critical for achieving high-voltage stable potassium-metal batteries(PMBs).However,the common anions cannot simultaneously prevent the formation of ’dead K’ and the corrosion of Al current collector,resulting in poor cycling stability.Here,we demonstrate cyclic anion of hexafluoropropane-1,3-disulfonimide-based electrolytes that can mitigate the ’dead K’ and remarkably enhance the high-voltage stability of PMBs.Particularly,even using low salt concentration(0.8 M) and addi...     

Rollback,scissor-like closure of the Mongol-Okhotsk Ocean and formation of an orocline:magmatic migration based on a large archive of age dataOA

Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly.The eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world’s largest magmatic provinces.Using a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly ’folded’ linear Carboniferous-Jurassic magmatic belts that wrap arou...     

区域性协同创新理论机制与评价研究

深入研究区域协同创新的理论机制,对于提高区域创新效率、提升区域发展竞争力具有重要意义。从系统 论的角度出发,论述区域协同理论及机制,分析国内外协同创新模式,综合借鉴已有的相关评价指标体系,确立了4 项 一级指标、11项二级指标、32个三级指标,采用层次分析法和专家咨询法确定指标权重,构建了区域性协同创新能力 评价指标体系。对15个副省级城市区域性协同创新能力进行实证分析和评价,找出影响区域性协同创新能力的主要因 素,分析济南市协同创新存在的主要问题,提出推动当地协同创新发展的对策与建议。     

新浪微博替代计量指标特征分析

通过对新浪微博替代计量指标进行统计分析,探索中文环境下替代计量指标的特征和规律。研究发现:新浪微博替代计量指标覆盖率不足1%,但由于追踪时间和追踪对象的局限,该数字可能被严重低估;新浪微博关注和讨论较多的论文来自"综合""生物化学、遗传学与分子生物学""保健科学""医学"及"生命科学"等学科;新浪微博替代计量指标的期刊分布满足对数曲线规律,除著名的综合性期刊如Nature等,预印本平台arXiv和开放存取期刊PLoS ONE等也获得了较多关注,生物学和医学的"明星期刊"最多;新浪微博主要关注最新论文,正式出版180天内受到关注的论文比例高达68.66%,同时也会关注经典论文;新浪微博发布者倾向宣传、推介和评论贴近生活、趣味性强、实用性高、涉及生命健康的学术论文,传递出引文无法体现的社会价值和学术价值;新浪微博替代计量指标呈现出显著的离散和集中分布特点,5.1%的学术论文获得了50%的新浪微博关注。此外,受新浪微博关注的论文在全球范围内获得远高于平均水平的关注度。     

Impaired motor control after sport-related concussion could increase risk for musculoskeletal injury: Implications for clinical management and rehabilitation

This review presents a conceptual framework and supporting evidence that links impaired motor control after sport-related concussion(SRC)to increased risk for musculoskeletal injury.Multiple studies have found that athletes who are post-SRC have higher risk for musculoskeletal injury compared to their counterparts.A small body of research suggests that impairments in motor control are associated with musculoskeletal injury risk.Motor control involves the perception and processing of sensory information and subsequent coordination of motor output within the central nervous system to perform a motor task.Motor control is inclusive of motor planning and motor learning.If sensory information is not accurately perceived or there is interference with sensory information processing and cognition,motor function will be altered,and an athlete may become vulnerable to injury during sport participation.Athletes with SRC show neuroanatomic and neurophysiological changes relevant to motor control even after meeting return to sport criteria,including a normal neurological examination,resolution of symptoms,and return to baseline function on traditional concussion testing.In conjunction,altered motor function is demonstrated after SRC in muscle activation and force production,movement patterns,balance/postural stability,and motor task performance,especially performance of a motor task paired with a cognitive task(i.e.,dual-task condition).The clinical implications of this conceptual framework include a need to intentionally address motor control impairments after SRC to mitigate musculoskeletal injury risk and to monitor motor control as the athlete progresses through the return to sport continuum.     

Risk of bias and reporting practices in studies comparing VO2max responses to sprint interval vs. continuous training: A systematic review and meta-analysis

Background:It remains unclear whether studies comparing maximal oxygen uptake(VO_{2 max}) response to sprint interval training(SIT) vs.moderate-intensity continuous training(MICT) are associated with a high risk of bias and poor reporting quality.The purpose of this study was to evaluate the risk of bias and quality of reporting in studies comparing changes in VO_{2 max} between SIT and MICT.Methods:We conducted a comprehensive literature search of 4 major databases:AMED,CINAHL,E...     

Use of sport-related concussion information sources among parents of United States middle school children

Objective:Parents may use various information sources to obtain information about sport-related concussions(SRC).This study examined SRCrelated information sources used by parents of United States middle school children(age:10-15 years).Methods:A panel of 1083 randomly selected U.S.residents,aged≥18 years and identifying as parents of middle school children,completed an online questionnaire capturing parental and child characteristics,and utilization and perceived trustworthiness of various sour...     

滑翔机是怎样飞行的?

滑翔运动是最引人入胜的一种航空体育运动,也是青年们的一种体育运动。在一种没有发动机的叫做滑翔机的飞行器上面,人们可以在空中保持停留好几小时,航行数百公里的距离,不但能升得相当高,而且还能作一些优等航空术的特技表演。滑翔的这种锻炼能使人们熟悉飞行,培养出飞行人员的果断品质。许多苏联杰出的飞行员,例如,A.N.巴克雷斯金,A.N.莫洛得奇依等人,都是从滑翔飞行中锻