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基于分布式光纤振动传感的海缆锚害故障检测 被引量:11
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作者 汪洋 周波达 +3 位作者 林晓波 李世强 胡凯 吕安强 《光通信研究》 北大核心 2018年第2期40-43,共4页
为了利用分布式光纤振动传感技术进行光纤复合海底电缆(简称为海缆)锚害故障检测,开展了海缆运行现场的锚害试验。用550吨的货船和1 000kg的船锚模拟了锚砸和拖曳事件,用基于相位敏感光时域反射计(Ф-OTDR)技术的分布式光纤振动传感设备... 为了利用分布式光纤振动传感技术进行光纤复合海底电缆(简称为海缆)锚害故障检测,开展了海缆运行现场的锚害试验。用550吨的货船和1 000kg的船锚模拟了锚砸和拖曳事件,用基于相位敏感光时域反射计(Ф-OTDR)技术的分布式光纤振动传感设备对3.3km三芯海缆内的光纤进行了实时监测,获得了海面平静、锚砸和船锚拖曳3种情况下,光纤振动信号的能量和快速傅里叶变换幅度谱在时间和空间上的分布数据,并对其进行了分析。结果表明,海面平静时能量和幅度都很小,锚砸时能量和幅度会产生短时上升且频率成分丰富,船锚拖曳时能产生较长时间的能量和幅度上升,但频率成分较锚砸少。分布式光纤振动传感技术可有效检测锚害故障。 展开更多
关键词 分布式光纤振动传感技术 海缆 锚害 故障检测
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Oral Chinese Herbal Medicine for Depressive Disorder in Patients after Percutaneous Coronary Intervention:A Systematic Review and Meta-Analysis
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作者 XUE Ya-jun XIE Ying +4 位作者 ZHAO Guo-liang zhou bo-da LI Kun LI Si-yuan ZHANG Ping 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2020年第8期617-623,共7页
Objective:To evaluate the effectiveness and safety of oral Chinese herbal medicines(CHMs)on post-percutaneous coronary intervention(PCI)patients with depressive disorder in coronary heart disease(CHD).Methods:A litera... Objective:To evaluate the effectiveness and safety of oral Chinese herbal medicines(CHMs)on post-percutaneous coronary intervention(PCI)patients with depressive disorder in coronary heart disease(CHD).Methods:A literature search was conducted through databases including PubMed,Cochrane Library,Chinese National Knowledge Infrastructure Databases(CNKI),Chinese Biomedical Literature Database(SinoMed),Chongqing VIP Chinese Science and Technology Periodical Database(VIP)and Wanfang Database up to August 2018.Randomized controlled trials(RCTs)comparing CHMs with placebo or no additional treatments on the basis of standard conventional pharmacological therapies were included.Data extraction,analyses and quality assessment were performed according to the Cochrane standards.RevMan 5.3 software was used to synthesize the results.Results:A total of 16 RCTs enrolling 1,443 participants were included in this systematic review.When compared with antidepressants alone,CHMs showed similar benefits with less side effects[risk ratio=0.54,95%confidence interval(CI)0.43 to 0.69,582 patients];meanwhile,the combination therapy may have more advantages than antidepressants alone[mean difference(MD)=–1.03,95%CI–1.81 to–0.25,267 patients).When identified with placebo,CHMs seem to have more advantages in relieving depressive symptoms(MD=–19.00,95%CI–20.02 to–17.98,189 patients).However,when compared with basic treatment of postPCI,CHMs showed different results in two trials.In terms of post-PCI related clinical symptoms,CHMs seem to have more advantages in relieving chest pain and other general clinical symptoms.However,the heterogeneity in this review was generally high,it may be caused by different interventions used in each trial and the low quality of the trials.Conclusions:In total,CHMs showed potentially beneficial effects on depressive symptoms and post-PCI related clinical symptoms.However,because of small sample size and potential bias of most trials,this result should be interpreted with caution.More rigorous trials with larger sample size and higher quality are warranted to give high quality of evidence to support the use of CHMs for CHD complicated with depression. 展开更多
关键词 Chinese herbal medicine post-percutaneous coronary intervention patients META-ANALYSIS systematic review
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