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Climbing-Specific Fitness Profiles and Determinants of Performance in Youth Rock Climbers
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作者 Jeanne Nichols david wing +5 位作者 Zachary Bellicini Rosie Bates david Hall Doreen Hall Mark Kattus Jian Shen 《Journal of Sports Science》 2018年第5期257-267,共11页
With the recent decision by the International Olympic Committee to include rock climbing in the 2020 Olympic Games, climbers and coaches are seeking information to enhance training methods and improve performance. The... With the recent decision by the International Olympic Committee to include rock climbing in the 2020 Olympic Games, climbers and coaches are seeking information to enhance training methods and improve performance. The purpose of this study was two-fold:(1) to evaluate climbing-specific fitness and establish percentile rankings among youth climbers;and (2) determine the relationship between fitness and climbing performance. Anthropometrics, fitness, and performance on three indoor bouldering problems ranging in difficulty from V0-V8 were assessed in 64 youth climbers (35 girls, 29 boys) aged 7-17 from the United States. Data are reported by age groups (7-11;12-17 y) and gender. Percentile rankings of fitness scores were computed for girls and boys separately. Analysis of variance was used to compare fitness by age groups and by gender. Regression analysis evaluated the association between climbing performance and fitness. Fitness scores were generally higher among boys than girls, and older vs. younger climbers. Multivariable linear regression revealed that, after adjusting for age, gender, and anthropometrics, fitness variables explained 49% of the variance in performance. Climbing-specific fitness measures previously established on adults are associated with bouldering performance in youth climbers, and therefore may be useful for monitoring progress in training. 展开更多
关键词 Rock CLIMBING children climbing-specific FITNESS PERFORMANCE
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TrueSNAP快门可锁定快速移动物体 Micron CMOS图像传感器中的电子全息快门结构
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作者 david wing 《中国集成电路》 2007年第6期82-83,74,共3页
拍摄清晰的数码图像很不容易,特别是在物体移动时。如果摄像头的曝光时间没有与物体的移动准确同步,图像将会模糊,甚至无法检测到模糊图像的边缘,这样就无法使用特定图像处理算法。为了捕捉到运动物体的清晰、准确图像,Micron开发... 拍摄清晰的数码图像很不容易,特别是在物体移动时。如果摄像头的曝光时间没有与物体的移动准确同步,图像将会模糊,甚至无法检测到模糊图像的边缘,这样就无法使用特定图像处理算法。为了捕捉到运动物体的清晰、准确图像,Micron开发出一种称为True SNAP的技术,它是一种电子快门成像器结构,特别适用于提供定格图像的CMOS图像传感器。这种结构有时也被称为全息快门,它能够对图像的曝光时间精确控制,从而让摄像头将图像定格,将模糊降低到最低程度。 展开更多
关键词 CMOS图像传感器 MICRON 移动物体 电子快门 电子全息 结构 锁定 模糊图像
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