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高效反应釜设备设计与传热性能的多尺度优化分析 被引量:1
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作者 刘茂睿 《中国石油和化工标准与质量》 2024年第5期132-134,共3页
本文从多个角度探讨了高效反应釜设备的构造和热传递特性。通过优化全局架构规划,选用具有良好导热特性、低热膨胀系数的材料,并采用各种创新方法,有望大幅增强设备的散热性能和资源使用效益,同时减少资源使用量和成本。我们深入研究了... 本文从多个角度探讨了高效反应釜设备的构造和热传递特性。通过优化全局架构规划,选用具有良好导热特性、低热膨胀系数的材料,并采用各种创新方法,有望大幅增强设备的散热性能和资源使用效益,同时减少资源使用量和成本。我们深入研究了我国常见高压反应釜的设计与生产过程,旨在提高我国反应釜的生产质量。 展开更多
关键词 高效反应釜设备设计 传热性能 多尺度优化分析
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Optimum Solution for the Safe Drinking Water Crisis in Tala Upazila, Bangladesh 被引量:1
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作者 Sajidur RAHMAN ZHAO Junkai 《Journal of Resources and Ecology》 CSCD 2020年第2期213-222,共10页
Coastal areas of Bangladesh are especially vulnerable due to their physiographic location and exposure to natural calamities. Around 35 million people living in coastal areas have no access or limited access to safe d... Coastal areas of Bangladesh are especially vulnerable due to their physiographic location and exposure to natural calamities. Around 35 million people living in coastal areas have no access or limited access to safe drinking water. Contamination of water sources by salinity, arsenic or iron are the principal causes of water scarcity. Rising sea levels and unevenness of climatic events due to climate change will exacerbate the situation in coastal areas, especially in the southwestern coastal zone. This study examines one of the vulnerable coastal upazila Tala at Satkhira(an 'upazila' is a medium level administrative unit in Bangladesh) in the southwestern zone of Bangladesh to understand the gravity of the problems. The study develops a GIS based multi-criteria analysis to identify suitable options and locations of fresh water as part of a current and future solution to the problems and further deterioration. To fulfill the objectives, a questionnaire-based GPS guided field survey was conducted to collect details of field level conditions in order to find a suitable solution. Because aquifers are considered the primary source of drinking water, field data have been analyzed for two distinct aquifers, one relatively shallow and one deeper, to understand aquifer quality. Potentiality of different water sources the socioeconomic status of communities, types of water use and corresponding sources and water demand are also evaluated. The analysis finds that alternative water sources that are safe are difficult to find, because both surface and groundwater-based sources are already contaminated, and there are no nearby, easily accessible safe sources. Groundwater-based sources are contaminated by arsenic, iron or salinity, and surface water-based sources are not in use due to maintenance and management issues. In some cases, surface water sources are polluted by flash flooding of high saline water during storm surges or seepage from saline water-based aquacultures. Multiple limitations identified during field observations and field data analysis were considered as an analytical parameter A GIS based multi-criteria analysis incorporated field data, including Geo-spatial and socioeconomic information for road networks, settlement locations, number of households, quality and quantity of existing water sources, water demand and business opportunities. The analysis found some potential options in distributed locations which are consistent with community demand. Suggested options made use of technologies that are already understood and commonly used by communities, like deep tubewells, PSFs(Pond Sand Filter) and WTPs(Water Treatment Plant). In the study area, PSF is the most commonly used method and to make this surface water-based technology sustainable some precautionary measurements are suggested. 展开更多
关键词 safe drinking water coastal community multi-criteria analysis suitable options BANGLADESH
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