Model calculating annual mean atmospheric dispersion factor for coastal site of nuclear power plant

ＩｎｔｒｏｄｕｃｔｉｏｎＡｎａｔｍｏｓｐｈｅｒｅｄｉｓｐｅｒｓｉｏｎｆｉｅｌｄｅｘｐｅｒｉｍｅｎｔｗａｓｄｏｎｅｏｎｔｈｅｃｏａｓｔａｌｓｉｔｅｏｆｎｕｃｌｅａｒｐｏｗｅｒｐｌａｎｔ (ＮＰＰ)ｉｎｔｈｅｅａｓｔｐａｒｔｏｆＣｈｉｎａｄｕｒｉｎｇ 1995— 1996 Ｔｈｅｃｏｎｔｅｎｔｏｆｔｈｉｓｅｘｐｅｒｉｍｅｎｔｉｎｃｌｕｄｅｓ:ｈｏｕｒｌｙｏｂｓｅｒｖａｔｉｏｎｏｆｗｉｎｄａｎｄｔｅｍｐｅｒａｔｕｒｅｏｎｔｈｅｔｏｗｅｒｏｆ10 0ｍ ;Ｏｂｓｅｒｖａｔｉｏｎｏｆｓｕｒｆａｃｅｗｉｎｄａｎｄｓｅｅａｎｄｌ…     

组合芬顿工艺处理垃圾渗滤液纳滤浓缩液的试验研究

利用芬顿和光-芬顿工艺降解垃圾渗滤液纳滤浓缩液中的难降解有机物。起始pH值5.0及较低H_2O_2/Fe~(2+)投加量时,芬顿法的氧化-絮凝作用可以去除70%以上的COD。采用芬顿氧化-絮凝和光-芬顿组合工艺处理不同浓度纳滤浓缩液时,H_2O_2/Fe~(2+)投加量为35 m M/8 m M和90 m M/10 m M时均可实现90%的COD和TOC去除率;组合工艺出水COD为112~160 mg/L,BOD/COD为0.35~0.43。纳滤浓缩液中检出的13种多环芳烃经过组合工艺处理后的总去除率均约在90%。     

The impact on food security and future adaptation under climate variation: a case study of Taiwan’s agriculture and fisheries

According to Food and Agriculture Organization and Intergovernmental Panel on Climate Change reports, climate change will lead to a severe food-supply problem. In the future, food production will continually decrease because of aggravated effects of climate change, causing food production to continually decrease. Food production will be unable to satisfy the demand of the global population, leading to a food-security crisis. As the world population continues to increase, the shortage of food will become increasingly severe, particularly for those located in “climate impact hotspots” of tropical, subtropical, small-island countries, and countries that are dependent on imports to meet domestic demand such as Taiwan. Numerous Taiwanese studies have suggested that agricultural and fishery productivity has declined because of climate variation, which may cause changes and instability in food quantity and quality, and increase deficiency and uncertainty in the food supply. Therefore, to discuss the risks posed by climate change to the stability of food supply and demand, this paper, taking Taiwan as a case, explored the impact of climate variation on food security and future adaptation strategies. TaiCCAT’s supportive system for decision-making (TSSDA) was adopted here to assess and analyze the current situations of agricultural and fisheries production and supply, as well as future food supply risks, in addition to evaluating the deficiencies in the existing climate adaptation strategies in order to plan and revise feasible future adaptation alternatives. Based on the rule of risk management, the adaptation strategies recommended in this study were differentiated into two categories: proactive adaptation and planned adaptation. Proactive adaptation is emphasized to counter the uncertainty of food production, which increases the difficulty of production and necessity to import food. Conversely, planned adaptation can be used to manage the uncertainty of food supply to implement adjustments in production and marketing, as well as to mitigate the impact of climate variation.     

基于高斯模型的新场气田输气管道泄漏模拟研究

基于高斯烟团模型建立了适合新场气田的输气管道泄漏模型,考虑了管道压力、泄漏衰减、环境因素的影响,模拟分析了管道压力、泄漏时间与大气稳定度对泄漏天然气燃爆区域的影响,并计算获得了新场气田某干线天然气泄漏下风向燃爆极限距离图版,对指导管道安全政策、方案制定具有重要意义。     

广东省滨海电厂环境成本分析研究

根据广东省滨海电厂的类型和污染特点,建立了针对滨海的燃煤电厂、核电厂、LNG电厂的环境成本估算体系,通过采用环境价值标准法、机会成本法、污染损失系数法、模型公式等多种评估方法,估算得出广东省各类型滨海电厂环境成本为:核电0.0341元/kWh,煤电0.03109元/kWh,LNG电厂0.010386元/kWh.结合各类型发电技术的一般成本,得出在综合考虑环境友好性及经济性的情况下,广东省滨海电厂最优的发展选择为核电,其次为煤电,LNG电厂暂时不宜过多地发展.     

Influence of visual clutter on the effect of navigated safety inspection: a case study on elevator installation

Introduction. Navigated safety inspection based on task-specific checklists can increase the hazard detection rate, theoretically with interference from scene complexity. Visual clutter, a proxy of scene complexity, can theoretically impair visual search performance, but its impact on the effect of safety inspection performance remains to be explored for the optimization of navigated inspection. This research aims to explore whether the relationship between working memory and hazard detection rate is moderated by visual clutter. Methods. Based on a perceptive model of hazard detection, we: (a) developed a mathematical influence model for construction hazard detection; (b) designed an experiment to observe the performance of hazard detection rate with adjusted working memory under different levels of visual clutter, while using an eye-tracking device to observe participants’ visual search processes; (c) utilized logistic regression to analyze the developed model under various visual clutter. Conclusion. The effect of a strengthened working memory on the detection rate through increased search efficiency is more apparent in high visual clutter. This study confirms the role of visual clutter in construction-navigated inspections, thus serving as a foundation for the optimization of inspection planning.     

What adverse health effects will environmental heavy metal co-exposure bring us: based on a biological monitoring study of sanitation workers

Environmental Science and Pollution Research - To investigate the relationship between health effect profile and co-exposure to heavy metal, 254 sanitation workers from Guangzhou, China, were...     

煤—焦炉气共热解脱硫脱氮的研究

本文对兖州高硫煤在不同压力、升温速率及终态温度条件下，与焦炉煤气在１０ｇ固定床反应器中共热解所得半焦无元素组成进行系统的分析比较，结果表明，在压力为３ＭＰａ温度为６５０℃，升温速率为５℃、ｍｉｎ＾－１较为温和的条件下，兖州高硫煤与焦炉气共热解的脱硫脱氮率分别高达８６．４７％和５９．６３％，硫在热解产品中的分布大致为：半焦中７０％，焦油中１０％，气相中２０％；氮的分布为：６０－７０％滞留的半焦中，２