Results 21 to 30 of about 16,111 (89)
ABSTRACT The purpose of this study is to determine the relationship between productivity and socioeconomic characteristics, as well as the degree to which job satisfaction and engagement can strengthen or moderate this association. With a focus on the mediating roles of job satisfaction and job engagement, this study examines the complex relationship ...
Abdullah Al Masud +6 more
wiley +1 more source
Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
wiley +1 more source
Heart rate variability in horses with and without severe equine asthma
Abstract Background Equine asthma in severe form (severe equine asthma [sEA]) shares remarkable similarities with human asthma. Human studies detected changes in the autonomic nervous system function in asthmatic patients based on heart rate variability (HRV) analysis. Study design Observational study. Objectives To investigate the relationship between
Zsófia Nyerges‐Bohák +5 more
wiley +1 more source
Abstract Quality water is essential to people's health and social and economic well‐being. Evaluation of the quality of the water sources provides benchmark data on quality status and insights into the development of further protective measures. A laboratory‐based cross‐sectional study design was conducted in the diarrheal hotspot area of the North ...
Tsegahun Asfaw Abebe +5 more
wiley +1 more source
针对工业循环冷却水系统中低除垢速率限制电化学水软化技术应用的问题,采用多层不同孔径金属丝网耦合的复合网状阴极增强电化学水软化系统性能。结果表明:采用复合阴极的水软化系统除垢速率高达29.16g/(m2·h),能量消耗低至6.0 kW·h/kgCaCO3。系统性能的提升归因于阴极特殊的结构,该结构可将化学反应(碱度产生和水垢沉积)分离和定位到复合网状阴极的不同区域,从而提高了除垢速率。
栾谨鑫 +9 more
doaj +2 more sources
针对软化水的强腐蚀性问题 ,研制了一种复合型软化水缓蚀剂MYN— 4,该缓蚀剂不含NaNO2 及其他有毒有害成分 ,为绿色环保型化学品 ;介绍了其研究过程和缓蚀机理及影响其缓蚀性能的因素 ;试验表明 ,MYN— 4在高温 ,高含Cl-、SO4 2-的软化水中缓蚀性能优良 ,是NaNO2 理想的替代品。
吴宇峰, 周坤坪, 梁劲翌
doaj +2 more sources
以304不锈钢网作为外层支撑床,锯齿不锈钢网作为内部支撑结构,在复合锯齿网的锯齿空隙中填充焦炭,制备了一种由焦炭与不锈钢两种材料耦合的填充床电极,用于解决电化学水软化阴极无法长期高效运行的问题。探究了最优的电极结构参数,结果表明,在阴阳极间距、外层平网孔径和表观电流密度分别为1.5 cm、20目、80 A/m2时,电极对总硬度为700 mg/L的模拟循环冷却水的软化速率达到最佳,为46.873 g/(m2·h)。当电极表面被垢层覆盖导致软化速率大幅下降时,通过振动方式对电极进行再生,研究了电极的使用寿命,
王俊达 +5 more
doaj +2 more sources
<正>水的预处理,是现代化工生产中为水系统提供充足而优质的补水所必需的重要手段。常用的以无机铝盐或铁盐凝聚与石灰软化的所谓“沉淀软化法”即可基本达到预处理要求。这样处理所得的清水亦可同样做为脱盐水系统的合格补水,此即我国新引进的大型化肥生产装置中水系统预处理所采用的工艺。
张继亨
doaj +2 more sources
针对油田注汽锅炉软化装置再生消耗大量清水,且产生等量高含盐污水污染环境的现状,对软化装置再生各步骤的作用和耗水量进行了分析,提出了间歇正洗构想,通过现场试验,成功研究出了软化装置再生间歇正洗工艺技术和控制方法。应用结果表明:再生间歇正洗技术节水率达到34.3%,节水效果非常明显,是一项具有创新意义的节能革新技术。
顾嵘, 钟汉昌, 丁万成, 向涛
doaj +2 more sources

