爆炸头综合征(exploding head syndrome,EHS)是一种少见的与睡眠相关的感觉性异态睡眠,国内鲜有报道,临床上对EHS存在严重的误诊和漏诊,以及不必要的检查。详细的询问病史及长程视频脑电图一多导睡眠监测对于EHS的诊断及鉴别诊断至关重...爆炸头综合征(exploding head syndrome,EHS)是一种少见的与睡眠相关的感觉性异态睡眠,国内鲜有报道,临床上对EHS存在严重的误诊和漏诊,以及不必要的检查。详细的询问病史及长程视频脑电图一多导睡眠监测对于EHS的诊断及鉴别诊断至关重要。现就我院确诊的1例EHS患者进行电临床总结分析,同时对现有的EHS相关文献进行复习,旨在提高临床医生对EHS的认识,避免过度检查和误诊误治。展开更多
The velocity of warhead fragment is key criteria to determine its mutilation efficiency.We have designed an optoelectronic system to accurately measure the average velocity of warhead fragments.The apparatus including...The velocity of warhead fragment is key criteria to determine its mutilation efficiency.We have designed an optoelectronic system to accurately measure the average velocity of warhead fragments.The apparatus including two parallel laser screens spaced apart at a known fixed distance for providing time measurement start and stop signals.The large effective screen area is formed by laser source,retro-reflector and large area photo-diode with a central hole.Whenever a moving fragment interrupts two optical screen,the corresponding photometers senses the event,due to partial obscuration of the incident energy.Experiments have been performed to measure velocity of the different kinds of projectiles and fragments within various size and velocity ranges,including 7.62 mm bullet shooting experiments,prefabricated steel-ball exploding experiments.They were proved that the system is adequate to measure the velocity of larger than 5 mm,less than 1 000 m/s in the range,when fixed trajectory,test the velocity of the projectile average relative deviation is less than 4.21%.The system can perform satisfactorily with a lot of advantages such as larger effective light screen area,quick response speed,low uncertainty,strong repetition and reliability,etc.展开更多
文摘爆炸头综合征(exploding head syndrome,EHS)是一种少见的与睡眠相关的感觉性异态睡眠,国内鲜有报道,临床上对EHS存在严重的误诊和漏诊,以及不必要的检查。详细的询问病史及长程视频脑电图一多导睡眠监测对于EHS的诊断及鉴别诊断至关重要。现就我院确诊的1例EHS患者进行电临床总结分析,同时对现有的EHS相关文献进行复习,旨在提高临床医生对EHS的认识,避免过度检查和误诊误治。
基金supported by the Science and Technology on Electronic Test & Measurement Laboratory,China(No.9140C1204041009)Science and Technology on Electronic Test & Measurement Laboratory Fund for Young Scholars,China
文摘The velocity of warhead fragment is key criteria to determine its mutilation efficiency.We have designed an optoelectronic system to accurately measure the average velocity of warhead fragments.The apparatus including two parallel laser screens spaced apart at a known fixed distance for providing time measurement start and stop signals.The large effective screen area is formed by laser source,retro-reflector and large area photo-diode with a central hole.Whenever a moving fragment interrupts two optical screen,the corresponding photometers senses the event,due to partial obscuration of the incident energy.Experiments have been performed to measure velocity of the different kinds of projectiles and fragments within various size and velocity ranges,including 7.62 mm bullet shooting experiments,prefabricated steel-ball exploding experiments.They were proved that the system is adequate to measure the velocity of larger than 5 mm,less than 1 000 m/s in the range,when fixed trajectory,test the velocity of the projectile average relative deviation is less than 4.21%.The system can perform satisfactorily with a lot of advantages such as larger effective light screen area,quick response speed,low uncertainty,strong repetition and reliability,etc.
