H.265技术应时而生,锋芒毕露

科技发展日新月异,时时刻刻改变着人们的生活.在代表着高新风向标之一的便携式电子产品发布会中,企业每每都会展示出新产品不可思议的功能和应用,改变着千家万户的行为和生活方式,同时我们也察觉到在每一场新品发布会中,企业总会反复强调:我们的设备更清晰、更高效、更节能!     

H.265,会一统江湖吗?

“千秋万代,一统江湖”,这是金庸先生《笑傲江湖》里“日月神教”的一句响亮口号,安防行业技术发展至今,虽然没有开宗立派一说,但江湖纷争倒也热闹非凡,“新式武功”隔几年便横空出世,H.265便是近期最热的一门.它的出现引来各个厂家的纷纷驻足、围观、抢夺资源,期待第一时间能掌握其“精髓”,以立于不败之地.     

H.265强势登场,开启亲民路线

正近年来,安防行业发展态势蓬勃,诸多新兴的技术概念在安防行业中如雨后春笋般涌出。比如"互联网+"时代、大数据时代、H.265时代,这些概念代表着安防行业最先进的理念和技术。特别是H.265,作为视频编码的技术变革,在初期便来势汹汹,受到安防厂家的足够重视和推崇。那么,H.265技术在安防行业中推出这段时间里,是顺应时代的洪流,大浪淘沙真金闪耀,还是昙花一现,埋没在技术的长河里?让我们来看看H.265在新技术光环下,被安防厂家赋予了哪些顺应民意的变革。     

H.265,助推安防“互联网+”

2015年3月5日上午十二届全国人大三次会议上,李克强总理在政府工作报告中首次提出“互联网+”行动计划.”互联网+”简单来说就是将互联网与传统行业相结合,促进社会经济发展.从安防行业的发展来看,互联网IT技术的每一次进步都直接或者间接推动了安防行业的前进,安防行业也越来越离不开互联网的驱动.“互联网+安防”正逐渐走入我们的生活,刷脸消费、手机监控、远程控制、视频分享等等,都预示着“互联网+”的势头不可阻挡.     

H.265与4K碰撞,带来了什么?

正引言十几年前,H.264编码算法随着海康威视的视频压缩板卡来到了视频监控领域,H.264作为当时最为先进的国际标准编码算法,一时之间席卷了视频监控界。时至今日,H.264还是在视频监控界使用最为广泛的编码算法。随着视频监控的主流分辨率从标清逐渐过渡到现在的1080p高清,无论是工程建设中布网、设备成本,     

Occupational injury and psychological distress among U.S. workers: The National Health Interview Survey, 2004–2016

Introduction: Injuries at work may negatively influence mental health due to lost or reduced working hours and financial burden of treatment. Our objective was to investigate, in U.S. workers (a) the prevalence of serious psychological distress (SPD) by injury status (occupational, non-occupational, and no injury) and injury characteristics, and (b) the association between injury status and SPD. Methods: Self-reported injuries within the previous three months were collected annually for 225,331 U.S. workers in the National Health Interview Survey (2004–2016). Psychological distress during the past 30 days was assessed using the Kessler 6 (K6) questions with Likert-type scale (0–4, total score range: 0–24). SPD was defined as K6 ≥ 13. Prevalence ratios (PR) from fitted logistic regression models were used to assess relationships between injury and SPD after controlling for covariates. Results: The prevalence of SPD was 4.74%, 3.58%, and 1.56% in workers reporting occupational injury (OI), non-occupational injury (NOI), and no injury, respectively. Workers with head and neck injury had the highest prevalence of SPD (Prevalence: OI = 7.71%, NOI = 6.17%), followed by workers with scrape/bruise/burn/bite (6.32% for those with OI). Workers reporting OI were two times more likely to have SPD compared to those without injury (PR = 2.19, 95%CI: 1.62–2.96). However, there was no significant difference in SPD between workers with OI and workers with NOI (PR = 0.98, 95%CI: 0.65–1.48). Conclusion: The prevalence of SPD varied by injury status with the highest being among workers reporting OI. We found that the workers reporting OI were significantly more likely to have SPD than those without injury, but not more than those with NOI. Practical Applications: Mental health management programs by employers are necessary for workers who are injured in the workplace.     

MAIN CONTENTS CHINA SAFETY SCIENCE JOUR .Vol.14No.1～No.12 2004

DisastersAtmosphericScienceandCounteringNuclear,BiologicalandChemicalTerrorHUANGShun xiang　HUFei　etal　 3-　 3ComprehensiveControlofSpontaneousCombustionofGasandCoalforHighGas containingSeambyFullyMechanizedMiningTechnologyLUPing　ZHANGShi huan　etal　 4 - 6 8EvaluationAnalysisonGeologicalDisastersatTang LaSectionofQing ZangRailwayQIUQing Yun　WEIQing chao　etal　 5 -　 3GushingWaterfromYuanliangshanTunnelinMaobaSynclineandItsImpactonSurfaceWaterWANGMeng　XUZhao …     

Traumatic brain injury mortality among U.S. children and adolescents ages 0–19 years, 1999–2017

IntroductionTo examine recent traumatic brain injury (TBI) mortality changes among Americans aged 0–19 years by sex, age, urbanicity, state, and intent/causes of injury. Method: TBI mortality per 100,000 population and average annual percent changes (AAPCs), plus 95% confidence intervals (CIs) based on Joinpoint regression models. Results: Age-adjusted TBI mortality among Americans aged 0–19 years declined consistently, though at varying rates between 1999 and 2013 (AAPC = −4.8%, 95%CI: −6.3%, −3.2%), and then significantly increased from 4.42 per 100,000 population in 2013 to 5.17 per 100,000 population in 2017 (AAPC = 3.4%, 95% CI: 1.7%, 5.1%). During the study time period, boys, rural children, and youth aged 15–19 years had higher TBI mortality rates than girls, urban children, and younger children, respectively. TBI mortality from unintentional transport crashes decreased substantially in all age groups between 1999 and 2017, and especially from 1999 to 2010. TBI mortality from suicide increased significantly from 2008 to 2017 in the 10–14-year age group (AAPC = 14.6%, 95% CI: 12.6%, 16.6%) and from 2007 to 2017 in the 15–19-year age group (AAPC = 6.3%, 95% CI: 3.8%, 8.7%). Unintentional transport crashes were the leading cause of TBI-related mortality in 46 states in 1999, but by 2017, suicide became the first leading cause in 14 states. Conclusions: Pediatric TBI mortality declined consistently between 1999 and 2013 and increased significantly from 2013 to 2017, driven primarily by the mortality decrease from unintentional transport crashes and increase in suicide mortality. The spectrum of leading causes of pediatric TBI mortality changed across age groups and over time from 1999 to 2017. Practical Applications: TBI mortality increases in the United States since 2013 are driven primarily by increasing suicide rates, a trend that merits the attention of policy-makers and injury researchers. Action should be taken to curb growing TBI mortality rates among adolescents aged 10–19 years.