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INTRODUCTION During the last 20 years, UV coatings havegrown from their first applications in furniturecoatings to embrace many industries includingelectronics, printing and automotive. Because oftheir fast production rates, low temperature cureand volatile organic compound (VOC) reduction,UV curable coatings have achieved fast growth inthe coating market. However, in the conventionalUV-cured coating system, the reactive diluentsused to reduce the viscosity have strong odor,toxic… 相似文献
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目前,我国劳动力市场存在民工短缺和大学生就业困难的结构性矛盾,折射出我国经济增长方式和产业结构的不合理以及劳动力市场分割和资源配置效率低下的问题。同时,民工荒和大学生就业难二者自身也存在结构性矛盾,需要国家宏观的战略调整和有关各方的切实努力。 相似文献
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李宝芳 《忻州师范专科学校学报》2014,(1):121-122,128
形成性评价是对教师教与学生学的全过程的动态评估,能有效弥补终结性评价的不足.针对目前高校英语专业基础英语教学的现状,引进形成性评价已是一个必然趋势.文章拟从基础英语教学的评价现状出发,尝试将形成性评价融入到基础英语课堂教学中进行改革,旨在发掘学生的潜质,强化改进学生的学习,引导学生发挥各自的主体性、能动性和创造性,从而提高课程的教学质量和教学实效性. 相似文献
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本文将从婚配基本状况、婚姻自主权和择偶标准三方面探讨18世纪中期-19世纪中期英国工人的婚姻状况。 相似文献
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Two kinds of water-soluble and ultraviolet (UV) curable oligomers were synthesized and characterized. The oligomers were evaluated as resins for water-based UV curable coating. The rheology of the two oligomers' aqueous solutions was investigated in terms of solid fraction, pH dependence, and temperature dependence. The solutions were found to be Newtonian fluid showing rather low viscosity even at high solid fraction of 0.55. The drying process of the coatings and the properties of the cured coatings were studied by comparing them with water-dispersed UV-curable polyurethane methyl acrylate. It was evident that the water-soluble coating dried more slowly; and that the overall properties were inferior to those of the water-dispersed coating. 相似文献
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19世纪家庭成为英国中产阶级的重要文化场所。家庭生活在中产阶级中获得了重要的象征意义,变得高度仪式化。这是这一群体生活方式的一个典型特征。 相似文献
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李宝芳 《历史教学(高校版)》2007,(14)
19世纪是英国社会快速发展和急剧变革的时代,也是中产阶级崛起的时代.中产阶级在政治、经济、文化和社会等各方面的作用越来越显著.他们的价值观成为当时的主流价值观念. 相似文献
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用工荒已经成为一个制约企业持续发展的严重的社会问题,学术界对其特征、成因、对策等都有不同程度的研究,但是对其带来的中短期影响、未来趋势预测等研究不足,基于实地调研的实证分析也还不够,这些将是进一步研究的着力点。 相似文献