浅谈谐振效应在运动训练中的应用

运动训练是一项庞大的系统工程 ,优异运动成绩的取得是有诸多方面因素组成的复合体。仅从教练员与运动员如何配合来提高运动成绩加以阐述物理学中谐振效应的原理 ,通过从“体制保证 ,教练员与运动员的双向交流 ,严格管理制度 ,动力激励 ,表率示范以及清除干涉波”等促进教练员与运动员积极配合 ,以达到训练目的。     

Noise-enhanced dynamic single leg balance in subjects with functional ankle instability

BackgroundStochastic resonance stimulation (SRS) transmits subsensory electrical Gaussian white noise into the body to enhance sensorimotor function. This therapy has improved static single leg balance in subjects with functional ankle instability. However, the effect of this stimulation on dynamic single leg balance is not known. Improvements in dynamic single leg balance with SRS may have implications for enhancing functional rehabilitation for ankle instability. Thus, the purpose of this study was to determine the effects of SRS on dynamic single leg balance in subjects with functional ankle instability.MethodsThis study was an experimental research design and data were collected in a sports medicine research laboratory. Twelve subjects with functional ankle instability (69 ± 15 kg; 173 ± 10 cm; 21 ± 2 years) reported a history of ankle sprains and instability at the ankle with physical activity. A single leg jump-landing test was used to assess dynamic balance. Subjects were required to jump between 50% and 55% of the maximal vertical jump height, land on a single leg atop a force plate, and stabilize as quickly as possible. Jump-landing tests were performed with and without SRS. Three trials were performed for each treatment condition (SRS and control). A randomized block design was used to determine test order. Anterior/posterior and medial/lateral time-to-stabilization were computed to assess dynamic balance. Lesser time indicated better stability. One-tailed paired samples t tests were used for analysis (α ≤ 0.05).ResultsSRS improved anterior/posterior time-to-stabilization (stochastic resonance = 1.32 ± 0.31 s, control = 1.74 ± 0.80 s, p = 0.03), but did not enhance medial/lateral time-to-stabilization (stochastic resonance = 1.95 ± 0.40 s, control = 1.92 ± 0.48 s, p = 0.07).ConclusionClinicians might use SRS to facilitate balance improvements with sagittal plane dynamic single leg balance exercises that patients may not be able to perform otherwise.     

无线供能技术在智能轮椅供电系统中的应用

利用基于谐振的无线供能技术对智能轮椅进行无接触充电设计,并利用BCI技术实现对轮椅充电开关的控制,为有肢体障碍但脑部思维正常的人乘坐轮椅出行提供一种电能补充途径.     

唢呐共鸣的合理调控

最佳唢呐音色是通过人体对乐器的全方位调控获得的,不同的演奏方法将产生不同的演奏效果,而实现人体对声源与共鸣管的合理调控,是唢呐演奏者获得最佳演奏效果的基础。     

Spelling consistency affects reading in young Dutch readers with and without dyslexia

Lexical-decision studies with experienced English and French readers have shown that visual-word identification is not only affected by pronunciation inconsistency of a word (i.e., multiple ways to pronounce a spelling body), but also by spelling inconsistency (i.e., multiple ways to spell a pronunciation rime). The aim of this study was to compare the reading behavior of young Dutch readers with dyslexia to the behavior of readers without dyslexia. All students participated in a lexical-decision task in which we presented pronunciation-consistent words and pseudowords. Half of the pronunciation-consistent stimuli were spelling consistent and the other half were spelling inconsistent. All three reader groups, that is, students with dyslexia, age-match students, and reading-match students, read spelling-consistent words faster than spelling-inconsistent words. Overall reading speed of students with dyslexia was similar to that of reading-match students, and was substantially slower than that of age-match students. The results suggest that reading in students with or without dyslexia is similarly affected by spelling inconsistency. Subtle qualitative differences emerged, however, with respect to pseudoword identification. The conclusion was that the findings were best interpreted in terms of a recurrent-feedback model.     

基于综合性教学医院的核医学实习带教实践研究

针对医学影像专业、临床检验专业实习生的实习时间,制定相应的带教方案是保证顺利完成学生实习任务的前提,严格的管理制度和高素质的带教老师队伍是顺利完成实习任务的保障,了解核医学科的特点,提高实习学生的学习兴趣和学习热情是顺利完成实习任务的关键.     

举升用圆筒形直线感应电动机模型及电磁计算

根据旋转电动机工作原理,研发了基于直线感应电动机的圆筒形直线举升模型,并从能量平衡的角度建立了考虑边端效应的等效电路,计算了模型结构参数和起动特性参数,为举升模型的实用化奠定了技术基础。     

磁场中旋转圆柱导体内电场及电荷分布

金属圆柱导体在匀强磁场中分别绕对称轴和垂直于对称轴的轴转动时,推导出电场和电荷密度的表达式,研究表明电荷密度与角速度有关与旋转半径无关,电场的大小正比于旋转半径.     

Magnetic field effect on the fluorescence properties of two metal(Ⅱ) complexes based on 1,3,5-triazine-2,4,6-triyltrithio-tri-acetate

Two metal (Ⅱ) complexes based on 1,3,5-triazine-2,4,6-triyltrithio-tri-acetate exhibit similar (6,3)-connected 2D layer with kgd topology. Negative and positive magnetic field effects (MFEs) on the fluorescence properties of the Mn(Ⅱ) and Zn(Ⅱ) complexes are observed, respectively.     

基于“项目引领、任务驱动”的“磁法勘探”教学模式研究

为了提高学生的兴趣,增强学生对知识的理解能力,培养学生的动手能力,探索一条适合磁法勘探工学结合、理实一体教学模式的道路。我们对＂磁法勘探＂课程教学模式进行大幅度的改革,将整门课程划分为8大项目33大任务,将学生引领到任务中来,在提高学生的动手能力的同时也加强了学生理论联系实际的能力、分析解决问题的能力,符合高等职业教育的理念。