“多元化立体发展”的珠宝人才培养模式的建设与成效

本文主要探讨了“多个发展方向、多种培养方式、多个发展通道”的多元化立体发展的珠宝人才培养模式的建设,并论述了这一模式的成效。     

计算机辅助船舶设计系统研究

简要介绍计算机辅助船舶设计技术在国内外的发展,着重研究TRIBON、NUPAS-CADMATIC等常用系统。     

《雨霖铃》教学案例

本文结合教材和学生的特点制订了《雨霖铃》的教学目标和教学步骤,在鉴赏环节的设计上充分发挥学生的自主合作能力,实现了教师引导、学生为主体的教学理念,学生也获得了鉴赏诗词的经验。教师课后进行了反思,总结了这堂课的优点和不足之处,并提出了改进的方法。     

我国优秀女子三级跳远运动员第三跳缓冲与蹬伸技术运动学特征分析

通过高速摄像、数理统计等方法,对参加2013年全国田径锦标赛暨全运会预选赛女子三级跳远决赛的5名健将级运动员三跳距离及比例指标进行运动学分析,并与国外优秀三级跳远运动员的相关参数进行比较,针对存在的问题提出相应建议,以期为提高我国女子三级跳远的整体运动水平提供参考。     

Growth influences biomechanical profile of talented swimmers during the summer break

This study aimed to analyse the effect of growth during a summer break on biomechanical profile of talented swimmers. Twenty-five young swimmers (12 boys and 13 girls) undertook several anthropometric and biomechanical tests at the end of the 2011–2012 season (pre-test) and 10 weeks later at the beginning of the 2012–2013 season (post-test). Height, arm span, hand surface area, and foot surface area were collected as anthropometric parameters, while stroke frequency, stroke length, stroke index, propelling efficiency, active drag, and active drag coefficient were considered as biomechanical variables. The mean swimming velocity during an all-out 25 m front crawl effort was used as the performance outcome. After the 10-week break, the swimmers were taller with an increased arm span, hand, and foot areas. Increases in stroke length, stroke index, propelling efficiency, and performance were also observed. Conversely, the stroke frequency, active drag, and drag coefficient remained unchanged. When controlling the effect of growth, no significant variation was determined on the biomechanical variables. The performance presented high associations with biomechanical and anthropometric parameters at pre-test and post-test, respectively. The results show that young talented swimmers still present biomechanical improvements after a 10-week break, which are mainly explained by their normal growth.     

Musculoskeletal stiffness during hopping and running does not change following downhill backwards walking

Eccentric contractions that provide spring energy can also cause muscle damage. The aim of this study was to explore leg and vertical stiffness following muscle damage induced by an eccentric exercise protocol. Twenty active males completed 60 minutes of backward-walking on a treadmill at 0.67 m/s and a gradient of ? 8.5° to induce muscle damage. Tests were performed immediately before; immediately post; and 24, 48, and 168 hours post eccentric exercise. Tests included running at 3.35 m/s and hopping at 2.2 Hz using single- and double-legged actions. Leg and vertical stiffness were measured from kinetic and kinematic data, and electromyography (EMG) of five muscles of the preferred limb were recorded during hopping. Increases in pain scores (over 37%) occurred post-exercise and 24 and 48 hours later (p < 0.001). A 7% decrease in maximal voluntary contraction occurred immediately post-exercise (p = 0.019). Changes in knee kinematics during single-legged hopping were observed 168 hours post (p < 0.05). No significant changes were observed in EMG, creatine kinase activity, leg, or vertical stiffness. Results indicate that knee mechanics may be altered to maintain consistent levels of leg and vertical stiffness when eccentric exercise-induced muscle damage is present in the lower legs.     

我国高尔夫职业选手张连伟短推技术的运动学分析

运用APAS艾利尔运动技术分析软件及DLT生物力学三维录像分析方法,对我国高尔夫职业选手张连伟短推技术进行了分析。研究表明:除有关力学条件之外,球杆还应在运动区内按一定时间移动,各区的运动距离应按一定的比率随短推击球的距离移动。     

负荷时间长短对纵跳能力影响的运动学研究

对不同运动负荷时间后纵跳的运动学特征变化规律进行了研究。研究表明：大强度持续运动约3分钟左右，纵跳的跳起高度、起跳速度等运动学指标显著上升，蹬伸时间及到达最大力值的时间缩短；运动5分钟后，上述指标的变化情况正好相反；只有在适宜的运动负荷时间后，纵跳的运动学特征才进行有利于运动能力发挥的较好的组合状态。     

经阴道超声(二维联合三维)检查对宫腔占位性病变的诊断价值

目的:探讨经阴道超声(二维联合三维)检查对宫腔占位性病变的诊断价值。方法:收集2014年1月~2014年8月在广西中医药大学第一附属医院经阴道超声(二维联合三维)检查、诊断并经手术病理证实的82例宫腔占位病变资料进行回顾性分析。结果:实验组82例,经阴道超声检查结果为:子宫内膜息肉54例,子宫粘膜下肌瘤13例,子宫内膜癌2例,子宫内膜增生过长2例,所有病例都经病理证实,诊断符合率为90.1%。结论:以上四种常见宫腔占位病变经阴道超声检查,其声像图可作为对其诊断和鉴别诊断的重要依据。     

对巩立姣伦敦奥运会最好成绩的 推铅球滑步技术的运动学分析

采用Dartfish解析法,选取角度、高度、距离等指标,对巩立姣在2012年伦敦奥运会上最好成绩2022 m的推铅球滑步技术进行运动学分析,并与新西兰选手ADAMS Valerie进行比较,指出：巩立姣在团身动作阶段,右腿屈膝程度小,呈现躯干下潜、臀高肩低的姿态;在背向滑步右脚离地瞬间,左腿摆动过高,重心向投掷方向移动不充分、躯干起伏较大;在右脚着地瞬间,滑步距离较短、左侧肢体的回扣松散,超越器械幅度小;在左脚着地瞬间,左脚落于投掷中线上,两脚间左右距离过小、前后距离过大,超越器械不充分。针对以上问题,提出改善建议,为其今后技术训练和水平提升提供参考。