简介:【摘 要】介绍针对锅炉燃烧效率不高分析存在的问题,经过调研在锅炉脱硝入口烟道增加了CO监测,运行人员以此为依据调整燃烧,提高锅炉燃烧效率,达到了节能降耗目的。
简介:摘要:中等职业学校焊接专业课中,CO2气体保护焊的教学占很大的比例。但在焊接专业各种版本的教科书中,对CO2的实训教学都是以中厚板为例进行讲解的,并没有单独讲述CO2薄板焊的章节。其实,相对于中厚板的焊接教学,薄板焊接的技术难度更大,教学难点也多,教师教起来费劲,学生学起来也很吃力。如果教师能很好地解决了CO2薄板焊接这一课题的教学,对于其它规格板材的教学就很容易进行了。
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简介:AbstractIntroduction:Vitiligo and psoriasis are common skin diseases, while its co-occurrence in one patient is rare.Here, we reported a patient with co-occurrence of vitiligo and psoriasis.Case presentation:An 11-year-old girl developed depigmented patches on her right chin for 6 months. The noticed areas of depigmented skin steadily increased in size with no clinical symptoms. Wood’s lamp examination and laser scanning confocal revealed the clinical diagnosis of co-occurrence of vitiligo and psoriasis.Discussion:Speculations related to co-pathogenesis of vitiligo and psoriasis are still elusive, some explanations of this phenomenon like of isomorphic reaction, shared genetic basis of autoimmunity and inflammation, shared cellular immune pathways including Th1, Th17 and related cellular molecules such as TNF-α, IFN-α, IL-17 have been reported.Conclusion:The analysis and summary of the underlying association in co-occurrence of psoriasis and vitiligo may amplify future therapeutic options for both disease. Clinicians should pay attention to the methods that could simultaneously improve these two conditions.
简介:AbstractGrowing evidence suggests pollution and other environmental factors have a role in the development of tuberculosis (TB), however, such studies have never been conducted in Peru. Considering the association between air pollution and specific geographic areas, our objective was to determine the spatial distribution and clustering of TB incident cases in Lima and their co-occurrence with clusters of fine particulate matter (PM2.5) and poverty. We found co-occurrences of clusters of elevated concentrations of air pollutants such as PM2.5, high poverty indexes, and high TB incidence in Lima. These findings suggest an interplay of socio-economic and environmental in driving TB incidence.
简介:摘要:文章主要是介绍了 CO深冷分离装置工艺的主要流程,同时对其中存在的问题进行了分析,且采取到了相应的解决措施。
简介:摘要:大气环境是我们每个人每天都会接触到的气体,空气中各种各样的物质都会随着我们的鼻腔进入呼吸道在进入体内,目前已知的大气污染物就有100多种,造成大气污染的原因有两方面,一是自然灾害,二是人为污染,这两方面中后者为主要。目前我国大气污染物主要包括:S02、粉尘、CO2、PM2.5(细颗粒物)等,其中引起雾霾的主要物质就是PM2.5,PM2.5的产生又与S02、粉尘有很大的关系。CO2主要引起的是全球变暖和温室效应,虽然对人体不具有害性,但对气候的影响很大。太阳能是一种清洁型可再生能源,目前已经被广泛应用于发电、供热、制冷等领域。能源发展从粗放型利用向技术型转化,从环境污染向环境保护转化,太阳能有效利用引起了社会的广泛关注。