共查询到19条相似文献,搜索用时 31 毫秒
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1 前言长期以来,镀铬工艺以其硬度高、防变色性能好、耐蚀性强作为一种表面镀层及功能性镀层得到广泛的应用。但镀铬工艺亦存在着致命的缺点,即电流效率低、深镀能力差、污染大,特别是对有深凹槽的小型镀件,生产效率极低。针对我厂加工件的特殊性:工件小、产量高,特别是旅行剪刀在镀镍层变薄的情况下套铬时凹槽常有泛红的现象,因此就设想用一种新的镀层来代替铬镀层,解决产品的质量问题。 相似文献
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本文从艺术社会学的角度对民间剪纸进行探讨研究,从而发现剪纸艺术对社会生活产生的影响。首先对民间剪纸的历史以及艺术社会学的研究现状进行简单阐述,谈谈民间剪纸的艺术构成价值,并浅析民间剪纸在艺术社会学中的艺术研究角度。 相似文献
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在艺术多元化、个性化的背景下,将中国民间艺术中最具代表性的艺术样式,剪纸与年画结合。笔者抓住剪纸的镂空艺术以及年画浓郁的色彩氛围,将两者独特的艺术手法、流行元素相融合,为民间艺术的传承和发展寻求新的路径。 相似文献
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郭丽 《中国化妆品(专业版)》2020,(4):84-89
<正>分析2019年化妆品行业各方面的数据后可以看到,近年来化妆品行业一直紧贴着市场趋势和消费者需求发展,一些优秀的国货品牌甚至可以引领某一细分市场的消费潮流,比如完美日记、林清轩等,他们在疫情中积极调整线上营销策略,交出了一份亮眼的成绩单。相对来说,其他品牌虽然慢了一步,但从3月初开始也逐步紧贴市场,调整运营策略,通过 相似文献
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由于材质载体和工艺技术的特殊性,釉下五彩瓷山水画的创作,对创意、构思、技能诸方面皆有很高要求。实现意、技、艺的完美融合,才可缔造出高雅而又独特的艺术精品。 相似文献
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纤维增强复合材料抗侵彻研究综述 总被引:10,自引:2,他引:10
树脂基纤维增强复合材料以其比强度、比模量高和抗冲击性能好等优点,广泛应用于装甲防护领域.树脂基纤维增强复合材料具有很强的各向异性、应变率敏感性,不同的制作工艺、不同的树脂含量等都会带来弹道性能的巨大差异.本文简要总结了近年来纤维及其增强复合材料的动力学性能、不同结构的纤维增强复合材料的弹道性能等方面的研究情况. 相似文献
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本文主要从日用陶瓷的造型设计、装饰及工艺水平等几方面,对景德镇日用瓷滞后的现状和原因作了分析.同时提出了关于发展景德镇日用瓷的建议。培育具有现代设计思维的陶瓷设计人才和整合景德镇的陶瓷资源,增强陶瓷基础研发能力,是景瓷重振雄风的关键所在。 相似文献
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碳纤维复合材料圆筒受外压结构分析 总被引:4,自引:3,他引:1
本文对碳纤维复合材料圆筒受外压载荷的结构设计方法进行了研究.运用有限元法和公式法求解了临界压力,并进行了试验验证.结果表明,碳纤维复合材料圆筒受外压作用的主要失效型式为失稳破坏,有限元法和公式法的计算结果与试验结果一致. 相似文献
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低含量氨氮污水厌氧氨氧化影响因素研究 总被引:6,自引:0,他引:6
采用厌氧复合床,经自养型反硝化过程转化,成功启动了厌氧氨氧化反应器,共耗时165d.反应器启动成功后,TN容积负荷达到0.17 kg·m~(-3)·d~(-1),NO_2~--N与NH_4~+-N去除率分别为100%和93%.在此基础上,研究了pH、温度及不同有机质对厌氧氨氧化反应过程的影响,并通过正交及对比试验确定各因素的最佳控制条件.结果表明,在氨氮的质量浓度较低(~18mg·L~(-1))条件下,厌氧氨氧化反应pH=8.0.温度30℃、有机质(TOC)的质量浓度为40 mg·L~(-1)时,反应达到最佳状态. 相似文献
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Matthias Kind William N. Gill Ramagopal Ananth 《Chemical Engineering Communications》1987,55(1):295-312
Dendritic solidification of ice from a supercooled melt is studied under conditions which include thermal convection, forced convection, and the effect of the moving solid-liquid interface, which manifests itself as apparent convection. A theory based on Oseen rectilinear flow suggests that heat transfer from the tip of a growing dendrite can be described by a linear superposition of Peclet numbers due to the individual mechanisms of convection by forced bulk motion of the fluid and by the moving boundary which creates the apparent convection effect
This simple result was tested by plotting the experimental data over the full range available of rates of dendritic growth, in terms of the Nusselt number, as a function of the Peclet number, Pe*, which is based on the tip radius and the sum of the forced velocity of the fluid and the velocity of the tip of the dendrite. This procedure clearly reveals three regions in which different mechanisms control the process: 1) Dendritic growth is dominated by apparent and natural convection when the Peclet number, Pe*, is below about 2 10-3 2) When Pe* is equal to or greater than 10-1, dendritic growth is dominated by forced convection. 3) Between these limits, the combined effects of apparent and natural convection compete for dominance with forced convection. The equation which correlates the data over the full range of operating conditions, including the mixed convection region is obtained by non linear superposition of the Nusselt number correlations for Pe* less than 2 10-3 and greater than 10minus;1. The resulting Nusselt number represents the experimental data well over the full range studied. 相似文献
This simple result was tested by plotting the experimental data over the full range available of rates of dendritic growth, in terms of the Nusselt number, as a function of the Peclet number, Pe*, which is based on the tip radius and the sum of the forced velocity of the fluid and the velocity of the tip of the dendrite. This procedure clearly reveals three regions in which different mechanisms control the process: 1) Dendritic growth is dominated by apparent and natural convection when the Peclet number, Pe*, is below about 2 10-3 2) When Pe* is equal to or greater than 10-1, dendritic growth is dominated by forced convection. 3) Between these limits, the combined effects of apparent and natural convection compete for dominance with forced convection. The equation which correlates the data over the full range of operating conditions, including the mixed convection region is obtained by non linear superposition of the Nusselt number correlations for Pe* less than 2 10-3 and greater than 10minus;1. The resulting Nusselt number represents the experimental data well over the full range studied. 相似文献
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玻璃钢锚杆作为煤帮支护的理想材料,由于施工等原因经常受到偏心载荷作用,理论分析表明偏心载荷作用是煤帮锚杆极为不利的受力状态.本文首次采用试验的方法,模拟了玻璃钢锚杆受偏心载荷作用,设计了偏心载荷实验,与正常受力情况进行了对比研究.试验结果表明,玻璃钢锚杆尾部受偏心载荷作用,其最大抗拉拔力及延伸性能都大幅度降低. 相似文献