基于多普勒频谱图的力量项目运动员左室舒张期室壁运动研究

通过测定和比较正常人和力量项目运动员在静息和逐级递增负荷运动时,室壁多普勒频谱图上E波和A波峰值速度,研究左室后壁主动松弛和被动充盈功能的变化。结果表明：在静息状态,力量项目组房缩期心房收缩对于左室舒张充盈的贡献小于正常组;在逐级递增负荷中,力量项目组心脏舒张功能的动员表现为同时动用主动舒张储备和左房收缩储备,显示出心脏主动舒张的能力强,左房收缩储备大。     

运用测功仪测试赛艇运动员下肢SEMG特征之研究

通过观察赛艇运动员在测功仪上的运动情况,记录其胫骨前肌、腓肠肌及股四头肌的肌电变化,对不同运动时期的表面肌电图、积分肌电（IEMG）和平均频谱进行了定量分析,结果表明：不同运动时期不同肌肉的神经肌电活动变化不完全一致,这为进一步了解赛艇运动特点、科学训练提供了参考。     

Optimal sampling frequency in recording of resistance training exercises

The purpose of this study was to analyse the raw lifting speed collected during four different resistance training exercises to assess the optimal sampling frequency. Eight physically active participants performed sets of Squat Jumps, Countermovement Jumps, Squats and Bench Presses at a maximal lifting speed. A linear encoder was used to measure the instantaneous speed at a 200 Hz sampling rate. Subsequently, the power spectrum of the signal was computed by evaluating its Discrete Fourier Transform. The sampling frequency needed to reconstruct the signals with an error of less than 0.1% was f_99.9 = 11.615 ± 2.680 Hz for the exercise exhibiting the largest bandwidth, with the absolute highest individual value being 17.467 Hz. There was no difference between sets in any of the exercises. Using the closest integer sampling frequency value (25 Hz) yielded a reconstruction of the signal up to 99.975 ± 0.025% of its total in the worst case. In conclusion, a sampling rate of 25 Hz or above is more than adequate to record raw speed data and compute power during resistance training exercises, even under the most extreme circumstances during explosive exercises. Higher sampling frequencies provide no increase in the recording precision and may instead have adverse effects on the overall data quality.     

Symptoms of common mental disorders and related stressors in Danish professional football and handball

The aim of the study was twofold, namely (i) to determine the prevalence of symptoms of common mental disorders (CMDs) among current and retired professional football and handball players and (ii) to explore the relationship of psychosocial stressors with the outcome measures under study. A total of 1155 players were enrolled in an observational study based on a cross-sectional design. Questionnaires based on validated scales were set up and distributed among current and retired professional football and handball players by the Danish football and handball players’ union. In professional football, the highest prevalence (4 weeks) of symptoms of CMDs was 18% and 19% for anxiety/depression among current and retired players, respectively. In professional handball, the highest prevalence (4 weeks) of symptoms of CMDs was 26% and 16% for anxiety/depression among current and retired players, respectively. For both the current and retired professional football and handball players, a higher number of severe injuries and recent adverse life events (LE) were related to the presence of symptoms of CMD. Players exposed to severe injuries and/or recent adverse LE were 20–50% times more likely to report symptoms of CMD. The results suggest that it is possible to recognize the population of professional athletes that are more likely to develop symptoms of CMD. This could create the opportunity to intervene preventively on athletes that suffered from severe injury and/or recent adverse LE that could lead to a faster and safer recovery and psychological readiness to return to play.     

自闭症谱系障碍儿童家长参与课题研究:影响因素和改进策略

近年来,人们越来越多地推动自闭症儿童家长有意义地参与科学研究.这种参与式研究能够更好地满足自闭症谱系障碍儿童及其家庭的评估和干预需求.从自闭症儿童自身特征、家庭因素、研究课题本身等方面分析影响家长参与课题研究的因素,基于对影响因素的综合分析,分别从家长及研究者层面提出相关对策建议,以促进家长更积极、更深入地参与课题研究...     

纹理谱直方图与潜在语义标引在图像检索中的应用

提出一种新的描述局域像素灰度变化的纹理谱方法,并将该方法抽取出的纹理谱直方图特征用于图像检索。实验表明该特征计算简单,检索结果较好,是一种适于图像检索的底层特征。同时将应用于文本检索领域的潜在语义标引方法用于图像检索,并提出了一种计算近似矩阵秩的方法。实验结果显示使用该方法可以分析图像中存在的隐含语义结构,并提高检索效率。     

自闭症儿童家庭援助教育理念探析——以唐山市星之光自闭症培训机构为例

论文在前人研究的基础上,采用参与式观察与访谈相结合的研究方法,对唐山市星之光自闭症培训机构进行深入研究,了解其家庭援助教育理念,并从该理念下教师和家长的角色转变、家庭援助的具体策略等几个方面进行了探讨和分析,以期为自闭症儿童的教育工作提供一些有价值的参考。     

荧光光谱学中的表面活性剂

综述近年来在表面活性剂中荧光光谱学的发展,以及表面活性剂对荧光物质的增溶、增敏机理。展望了今后表面活性剂应用于荧光光谱研究的发展方向。     

降体重对运动员健康和运动能力的损害及预防

许多体育的参与者,如摔跤、体操和轻量级选手,试图通过降体重来达到最大相对肌肉力量.过快的降体重则通过饥饿和脱水等方式,这样有可能影响运动员的力量和耐力.该研究阐述了如果进行不健康的降体重可能有害于运动员的身体健康和运动成绩.对健康的降体重方式进行了讨论.     

对幼儿园中孤独症幼儿的感觉统合训练

孤独症是发生于儿童早期的一种涉及感知觉、情感、言语、思维和动作与行为等多方面的发育障碍。目前已有许多孤独症幼儿进入普通幼儿园或孤独症幼儿园中接受早期教育。本文探讨在幼儿园对孤独症幼儿进行感觉统合训练的意义,并重点介绍了感觉统合训练的内容,以及在训练过程中应遵循的基本原则。