情景模拟教学实验室多媒体系统建设

多媒体技术为情景模拟教学的实现提供了良好的技术支持。在情景模拟教学实验室的建设过程中,多媒体系统的设计和集成是一项重要内容。在研究了视频流媒体基础理论的基础上,论文分析了系统需求,明确了系统应具备的功能,提出了视音频录播点评系统整体构架,并整合现有的不同来源的流媒体节目,实现情景模拟教学中视音频的切换、录制、播放、回放、点评、刻录等功能,以高效、稳定地完成情景模拟的多项教学需求。     

对我国数控技术发展的战略思考

随着计算机技术的高速发展,传统的制造业开始了根本性变革,世界各国制造业开始广泛采用数控技术,以提高制造能力和水平,提高对动态多变市场的适应能力和竞争能力。因此当今在现代制造系统中,数控技术是关键技术,它集机械技术、微电子、计算机、自动检测、自动控制、传感器技术等高新技术于一体,具有高精度、高效率、高可靠等特点,对制造业实现柔性自动化、集成化、智能化起着举足轻重的作用。     

论高校内部财务控制中存在的问题及对策

随着高校资本运作规模不断扩大,高校经济活动呈现多样化和复杂化趋势。作为一种自我调节与自我约束的内在机制,内部控制在高校管理系统中有着举足轻重的作用,但是,由于内部控制制度存在着客观环境的局限性与内部控制制度自身的局限性等诸多因素的影响,在高校内部财务控制中还存在诸多问题。因此,相关制度的建立健全和有效实施,强化高校内部财务控制,进一步提高内控制度有效性,对高校未来全面快速发展具有十分重要的意义。     

基于CS理论和BP神经网络理论的工程造价估算研究

在借鉴国内外相关理论和方法的基础上,利用显著性成本理论和神经网络理论相结合对工程项目的投资进行估算.运用显著性成本理论,通过寻找显著性项目,简化工程造价估算的操作难度,从而解决操作烦琐的问题;并依据BP神经网络在大量已完工程资料中提取类似CSIs和显著性因子csf,从非线性角度实现了对项目投资的准确预测,并进行算例分析,从算例可以看到,预测值与实际值的相对误差很小,满足投资预测要求.     

多台三相电机协同继电控制电路设计与优化

根据三相电机自制简易加工机器实例,采用单键控制的自动化操作,对三台三相电机协同继电控制整体电路和故障提示电路进行了优化设计,加快了机械加工的生产进度,提高了机械加工的稳定性和成品率.     

The relationship between fundamental movement skill proficiency and physical self-confidence among adolescents

This study aims to assess fundamental movement skill (FMS) proficiency, physical self-confidence levels, and the relationship between these variables and gender differences among adolescents. Three hundred and ninety five adolescents aged 13.78 years (SD = ±1.2) from 20 schools were involved in this study. The Test of Gross Motor Development-2nd Edition (TGMD), TGMD-2 and Victorian Skills Manual were used to assess 15 FMS. Participants’ physical self-confidence was also assessed using a valid skill-specific scale. A significant correlation was observed between FMS proficiency and physical self-confidence for females only (r = 0.305, P < 0.001). Males rated themselves as having significantly higher physical self-confidence levels than females (P = 0.001). Males scored significantly higher than females in FMS proficiency (P < 0.05), and the lowest physical self-confidence group were significantly less proficient at FMS than the medium (P < 0.001) and high physical self-confidence groups (P < 0.05). This information not only highlights those in need of assistance to develop their FMS but will also facilitate in the development of an intervention which aims to improve physical self-confidence and FMS proficiency.     

Performing under pressure: Exploring the psychological state underlying clutch performance in sport

Clutch performance is improved performance under pressure. However, little research has examined the psychological state experienced by athletes in these situations. Therefore, this study qualitatively examined the subjective experience underlying clutch performance across a range of sports (e.g., team, individual) and standards (Olympic to recreational athletes). Sixteen athletes (M_age = 27.08 years; SD = 6.48) took part in in-depth, semi-structured interviews primarily after an exceptional performance (M = 4.38 days later; SD = 3.14). Data were analysed inductively and thematically. Clutch states involved 12 characteristics, including heightened and deliberate concentration, intense effort, and heightened awareness, which distinguished the experience of clutch from other optimal psychological states such as flow. Other characteristics, such as perceptions of control, were also reported and supported previous experimental research on clutch. These findings present in-depth qualitative insights into the psychological state underlying clutch performance, and are discussed in relation to the existing literature on optimal psychological states in sport.     

Effects of oncoming target velocities on rapid force production and accuracy of force production intensity and timing

The present study aimed to clarify the effects of oncoming target velocities on the ability of rapid force production and accuracy and variability of simultaneous control of both force production intensity and timing. Twenty male participants (age: 21.0 ± 1.4 years) performed rapid gripping with a handgrip dynamometer to coincide with the arrival of an oncoming target by using a horizontal electronic trackway. The oncoming target velocities were 4, 8, and 12 m · s^?1, which were randomly produced. The grip force required was 30% of the maximal voluntary contraction. Although the peak force (Pf) and rate of force development (RFD) increased with increasing target velocity, the value of the RFD to Pf ratio was constant across the 3 target velocities. The accuracy of both force production intensity and timing decreased at higher target velocities. Moreover, the intrapersonal variability in temporal parameters was lower in the fast target velocity condition, but constant variability in 3 target velocities was observed in force intensity parameters. These results suggest that oncoming target velocity does not intrinsically affect the ability for rapid force production. However, the oncoming target velocity affects accuracy and variability of force production intensity and timing during rapid force production.     

An occlusion paradigm to assess the importance of the timing of the quiet eye fixation

Abstract

The aim of the study was to explore the significance of the ‘timing’ of the quiet eye (QE), and the relative importance of late (online control) or early (pre-programming) visual information for accuracy. Twenty-seven skilled golfers completed a putting task using an occlusion paradigm with three conditions: early (prior to backswing), late (during putter stroke), and no (control) occlusion of vision. Performance, QE, and kinematic variables relating to the swing were measured. Results revealed that providing only early visual information (occluding late visual information) had a significant detrimental effect on performance and kinematic measures, compared to the control condition (no occlusion), despite QE durations being maintained. Conversely, providing only late visual information (occluding early visual information) was not significantly detrimental to performance or kinematics, with results similar to those in the control condition. These findings imply that the visual information extracted during movement execution – the late proportion of the QE – is critical when golf putting. The results challenge the predominant view that the QE serves only a pre-programming function. We propose that the different proportions of the QE (before and during movement) may serve different functions in supporting accuracy in golf putting.