排序方式: 共有13条查询结果,搜索用时 15 毫秒
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以三氯化铁、阳离子聚丙烯酰胺(CPAM)为主要原料,采用复合法制备了PFC-CPAM无机-有机高分子复合絮凝剂,并用其处理模拟混悬液。考察了PFC的适宜聚合温度和熟化时间,以及PFC与CPAM复配时CPAM加量、复配温度、复配pH值对模拟混悬液浊度去除率的影响。结果表明,在聚合温度为40℃、熟化时间为24h时,PFC对模拟混悬液具有较好的处理效果;PFC与CPAM复配时,CPAM加量为10mg/mol-Fe、复配温度为50℃、复配pH值为5时,复配的PFC-CPAM无机-有机高分子复合絮凝剂对模拟混悬液具有较为理想的处理效果,浊度去除率可达到97.8%。 相似文献
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随着近年来桌面端性能的提升以及Web前端技术的快速发展,已涌现出多种重量级的前端框架。这些前端框架将促进应用架构的前后端分离,同时在一定程度上也减轻了后台的处理压力。当下主流的重量级前端框架有Vue,Angular,React,ExtJS等。其中ExtJS更是企业前端开发的一站式解决方案。它包含了上百种现成的前端组件,并且使用统一的外观风格能够快速地构建出复杂的B/S或者单页(SPA)应用。就针对ExtJS开发工具SenchaArchitect在企业应用中对前端页面开发效率的提升与优化进行讨论。 相似文献
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为考察热管间的排列方式对热管传热效果的影响,用Fluent软件模拟不同气速及不同排列方式下热管式空气预热器热管间的温度场,结果表明,热管间正三角形排列更有利于热管传热. 相似文献
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Laser-induced breakdown spectroscopy(LIBS) is a promising analytical spectroscopy technology based on spectroscopic analysis of the radiation emitted by laser-produced plasma.However, for quantitative analysis by LIBS, the so-called self-absorption effects on the spectral lines, which affect plasma characteristics, emission line shapes, calibration curves, etc, can no longer be neglected. Hence, understanding and determining the self-absorption effects are of utmost importance to LIBS research. The purpose of this review is to provide a global overview of self-absorption in LIBS on the issues of experimental observations and adverse effects,physical mechanisms, correction or elimination approaches, and utilizations in the past century.We believe that better understanding and effective solving the self-absorption effect will further enhance the development and maturity of LIBS. 相似文献
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Fei CHEN 《等离子体科学和技术》2023,25(1):15510-182
The self-absorption effect in laser-induced breakdown spectroscopy(LIBS) reduces the accuracy of quantitative measurement results.The self-absorption-free LIBS(SAF-LIBS) has been proved to directly capture the optically thin plasma spectra by setting an appropriate exposure time.In this work,a novel SAF-LIBS technique with high repetition rate acousto-optic gating is developed,in which an acousto-optic modulator is used as the shutter to diffract the optically thin fluorescence,and a high repeti... 相似文献