Knowledge of impact conditions is critical to evaluating the terminal impact performance of a projectile.For a small caliber bullet,in-flight velocity has been precisely measured for decades using detection screens,bu...Knowledge of impact conditions is critical to evaluating the terminal impact performance of a projectile.For a small caliber bullet,in-flight velocity has been precisely measured for decades using detection screens,but accurately quantifying the orientation of the bullet on a target has been more challenging.This report introduces the Automated Small-Arms Photogrammetry(ASAP)analysis method used to measure,model,and predict the orientation of a small caliber bullet before reaching an impact surface.ASAP uses advanced hardware developed by Sydor Technologies to record a series of infrared digital photographs.Individual images(four orthogonal pairs)are processed using computer vision algorithms to quantify the orientation of the projectile and re-project its precise position and orientation into a three-dimensional muzzle-fixed coordinate system.An epicyclic motion model is fit to the measured data,and the epicyclic motion is extrapolated to the target location.Analysis results are fairly immediate and may be reviewed during testing.Prove-out demonstrations have shown that the impact-angle prediction capability is less than six hundredths of a degree for the 5.56 mm ball round tested.Keywords:Yaw,Terminal ballistics,Exterior ballistics,Test&evaluation,Computer vision,Image processing,Angle of展开更多
目的探讨消风散加减联合左西替利嗪口服液治疗风热犯表型荨麻疹的疗效。方法选取茂名市慢性病防治中心2018年6月-2019年6月期间诊治的70例风热犯表型荨麻疹患者,按简单随机法分为对照组和观察组各35例。两组患者治疗期间,均需充足的休息...目的探讨消风散加减联合左西替利嗪口服液治疗风热犯表型荨麻疹的疗效。方法选取茂名市慢性病防治中心2018年6月-2019年6月期间诊治的70例风热犯表型荨麻疹患者,按简单随机法分为对照组和观察组各35例。两组患者治疗期间,均需充足的休息,维持良好的心情,合理饮食,对照组左西替利嗪口服液10 m L/次,1次/d,餐前30min服用,观察组加用消风散加减方1剂/d,水煎服300 m L,分早晚饭后30 min服用,两组连续治疗14 d。评估治疗前、后两组疗效、荨麻疹的活动度、生活质量、荨麻疹消退时间、不良反应。结果治疗后,观察组总有效率显著高于对照组(P<0.05);治疗7 d、14 d,观察组荨麻疹活动度评分、皮肤病生活质量评分显著低于同期对照组(P<0.05);观察组荨麻疹完全消退时间显著短于对照组(P<0.05);观察组不良反应率显著低于对照组(P<0.05)。结论消风散加减联合左西替利嗪口服液治疗风热犯表型荨麻疹,效果显著,能够明显缓解临床症状,改善患者生活质量,效果优于单用左西替利嗪口服液,值得推广。展开更多
文摘Knowledge of impact conditions is critical to evaluating the terminal impact performance of a projectile.For a small caliber bullet,in-flight velocity has been precisely measured for decades using detection screens,but accurately quantifying the orientation of the bullet on a target has been more challenging.This report introduces the Automated Small-Arms Photogrammetry(ASAP)analysis method used to measure,model,and predict the orientation of a small caliber bullet before reaching an impact surface.ASAP uses advanced hardware developed by Sydor Technologies to record a series of infrared digital photographs.Individual images(four orthogonal pairs)are processed using computer vision algorithms to quantify the orientation of the projectile and re-project its precise position and orientation into a three-dimensional muzzle-fixed coordinate system.An epicyclic motion model is fit to the measured data,and the epicyclic motion is extrapolated to the target location.Analysis results are fairly immediate and may be reviewed during testing.Prove-out demonstrations have shown that the impact-angle prediction capability is less than six hundredths of a degree for the 5.56 mm ball round tested.Keywords:Yaw,Terminal ballistics,Exterior ballistics,Test&evaluation,Computer vision,Image processing,Angle of
文摘目的探讨消风散加减联合左西替利嗪口服液治疗风热犯表型荨麻疹的疗效。方法选取茂名市慢性病防治中心2018年6月-2019年6月期间诊治的70例风热犯表型荨麻疹患者,按简单随机法分为对照组和观察组各35例。两组患者治疗期间,均需充足的休息,维持良好的心情,合理饮食,对照组左西替利嗪口服液10 m L/次,1次/d,餐前30min服用,观察组加用消风散加减方1剂/d,水煎服300 m L,分早晚饭后30 min服用,两组连续治疗14 d。评估治疗前、后两组疗效、荨麻疹的活动度、生活质量、荨麻疹消退时间、不良反应。结果治疗后,观察组总有效率显著高于对照组(P<0.05);治疗7 d、14 d,观察组荨麻疹活动度评分、皮肤病生活质量评分显著低于同期对照组(P<0.05);观察组荨麻疹完全消退时间显著短于对照组(P<0.05);观察组不良反应率显著低于对照组(P<0.05)。结论消风散加减联合左西替利嗪口服液治疗风热犯表型荨麻疹,效果显著,能够明显缓解临床症状,改善患者生活质量,效果优于单用左西替利嗪口服液,值得推广。
