期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
雾霾天气下的车牌识别方法探讨 被引量:2
1
作者 徐继弘 刘号 《电子科学技术》 2017年第2期93-94,112,共3页
为消除雾霾天气对车牌识别的影响,本文探讨了两个基本的雾霾天气下图像增强方法,在车牌识别过程中,可根据实际需求选择直方图均衡化算法或多尺度Retinex算法增强图像的整体对比度,为后续的车牌识别奠定基础。
关键词 雾霾 直方图均衡化 多尺度RETINEX算法 车牌识别
下载PDF
Changing the strategy and culture of stroke awareness education in China: implementing Stroke 1-2-0 被引量:9
2
作者 Jing Zhao xutong Li +5 位作者 Xiaochuan Liu Yuming xu jihong xu Anding xu Yongjun Wang Renyu Liu 《Stroke & Vascular Neurology》 SCIE 2020年第4期374-380,共7页
This project implemented the Stroke1-2-0 stroke awareness programme across China and investigated its impact over a 2-year period.We initiated the Stroke1-2-0 educational campaign and Stroke1-2-0 special task forces(S... This project implemented the Stroke1-2-0 stroke awareness programme across China and investigated its impact over a 2-year period.We initiated the Stroke1-2-0 educational campaign and Stroke1-2-0 special task forces(STF)across the nation.Massive media coverage,community-based educational sessions with videos and other related materials and induction of Stroke1-2-0 STF were the major means of promotion.We delivered a survey at the end of 2016 and 2018 to evaluate the impact of our effort.A total of 3066 participants responded to the first survey in 2016,and 15207 participants responded in 2018 across China.The acceptance rate for Stroke1-2-0 versus FAST(an English-language stroke awareness tool)was 50.2%versus 19.1%in 2016,and changed significantly to 82.2%versus 8.0%in 2018(p<0.001).Stroke1-2-0 was well accepted by all ages and by people with different academic qualifications.Only 6.5%of survey respondents were aware that there was a therapeutic window for thrombolytic therapy in 2016,but this awareness increased significantly to 32.8%in 2018.Only 12.6%of people in 2016 indicated that they would send patients with stroke to the nearest hospital capable of performing thrombolytic therapy,but there was a nearly threefold increase(52.5%)in this number by 2018.More than 1000 major hospitals joined the Stroke1-2-0 STF,and more than 20000‘stroke warriors’have joined our stroke awareness improvement effort so far.Stroke1-2-0 stroke awareness programme is well-implemented and accepted,and is generating profound improvement in stroke awareness in China. 展开更多
关键词 EDUCATION CULTURE AWARENESS
原文传递
Effects of greenness on preterm birth: A national longitudinal study of 3.7 million singleton births 被引量:2
3
作者 Lina Zhang Shuyan Shi +17 位作者 Shenpeng Wu Ying Yang jihong xu Ya Zhang Qiaomei Wang Haiping Shen Yiping Zhang Donghai Yan Zuoqi Peng Cong Liu Weidong Wang Yixuan Jiang Su Shi Renjie Chen Haidong Kan Yuan He Xia Meng xu Ma 《The Innovation》 2022年第3期57-63,共7页
Exposure to greenness may lead to a wide range of beneficial health outcomes.However,the effects of greenness on preterm birth(PTB)are inconsistent,and limited studies have focused on the subcategories of PTB.A total ... Exposure to greenness may lead to a wide range of beneficial health outcomes.However,the effects of greenness on preterm birth(PTB)are inconsistent,and limited studies have focused on the subcategories of PTB.A total of 3,751,672 singleton births from a national birth cohort in China's Mainland were included in this study.Greenness was estimated using the satellitebased Normalized Difference Vegetation Index(NDVI)and Enhanced Vegetation Index with 500-m and 1,000-m buffers around participants’addresses.The subcategories of PTB(20-36 weeks)included extremely PTB(EPTB,20-27 weeks). 展开更多
关键词 MAINLAND BIRTH inconsistent
原文传递
2013~2017年中国空气质量改善与早产疾病负担改变 被引量:1
4
作者 Yixuan Jiang Yuan He +23 位作者 Shenpeng Wu Renjie Chen Ying Yang jihong xu Ya Zhang Qiaomei Wang Haiping Shen Yiping Zhang Donghai Yan Zuoqi Peng xudong Dong Hongping Zhang Lifang Jiang Huichu Li Yixiang Zhu Cong Liu Weidong Wang Xia Meng Tao Pei Ci Song Aaron Cohen xu Ma Jing Cai Haidong Kan 《Science Bulletin》 SCIE EI CSCD 2022年第9期879-882,M0003,共5页
Preterm birth(PTB)is a leading cause of perinatal mortality and morbidity worldwide[1].Since maternal and fetal health protection has been included in the United Nations Sustainable Development Goals,identification of... Preterm birth(PTB)is a leading cause of perinatal mortality and morbidity worldwide[1].Since maternal and fetal health protection has been included in the United Nations Sustainable Development Goals,identification of modifiable risk factors for PTB is particularly crucial.The Global Burden of Disease(GBD)Study 2019 recognized fine particulate matter(PM2.5)pollution as a risk factor for decreased gestational age and low birth weight. 展开更多
关键词 POLLUTION 空气质量改善 疾病负担
原文传递
Mg-induced g-C_(3)N_(4) synthesis of nitrogen-doped graphitic carbon for effective activation of peroxymonosulfate to degrade organic contaminants
5
作者 jihong xu Jianxin Song +2 位作者 Yulin Min Qunjie xu Penghui Shi 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第6期3113-3118,共6页
The nitrogen-doped carbon derived from graphitic carbon nitride(g-C_(3)N_(4))has been widely deployed in activating peroxymonosulfate(PMS)to remove organic pollutants.However,the instability of g-C_(3)N_(4)at high tem... The nitrogen-doped carbon derived from graphitic carbon nitride(g-C_(3)N_(4))has been widely deployed in activating peroxymonosulfate(PMS)to remove organic pollutants.However,the instability of g-C_(3)N_(4)at high temperature brings challenges to the preparation of materials.The nitrogen-doped graphitic carbon nanosheets(N-GC750)were synthesized by magnesium thermal denitrification.Magnesium undergoes the displacement reaction with small molecules produced by the pyrolysis of g-C_(3)N_(4),thereby effectively fixing carbon on the in-situ template of Mg_(3)N_(2)and avoiding direct product volatilization.N-GC750 exhibited excellent performance during the PMS activation process and bisphenol A(BPA,0.2 g/L)could be thoroughly removed in 30 min.A wide range of pH(3–11),temperature(10–40℃)and common anions were employed in studying the impact on system.Additionally,N-GC750 showed satisfactory reusability in cycle tests and promising applicability in real water samples.Quenching experiments and electron paramagnetic resonance(EPR)measurements indicated that singlet oxygen was the main active species coupled with partial electron transfer in N-GC750/PMS system.Furtherly,the oxidation products were identified,and their ecotoxicity was evaluated.This work is expected to provide a reference for the feasibility of preparing g-C_(3)N_(4)derived carbon materials and meaningful for PMS activation. 展开更多
关键词 Mg-induced Graphene PMS activation Nonradical process Bisphenol A Toxicity
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部