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1 Introduction TiNxcoatingspossessmanygoodproperties,suchashighhardness,highmeltingpoint,abrasionresistantanderosionresistant[1,2].Ithasbeenwidelyusedasabrasionanderosionresistantlayerinthefieldsofelectronicengineering,machineryandsoon.Itisalsousedasadornmentmaterialduetoitsgoldcolor.Inthepresentpaper,TiNxisanalyzedashighindexmaterialinplaceofTiO2fortheantireflective(AR)coatings. Forthesolgelprocess,dipandspinprocessareoftenusedtopreparecoatings.Inthispaper,printprocess,traditionallyuse… 相似文献
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This paper describes the preparation and properties of TiNx-SiO2 double-layered antireflective(AR) coatings that were applied with print process. The coating material was analyzed and TiNx was used instead of TiO2 as high refractive material. The influence of solution concentration on AR property was studied. The testing result shows that the coatings using print process are featured with excellent mechanical property and the AR property is comparable to American Southwall AR product. It is expected that the study would promote the industrialization progress in AR coatings. 相似文献
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制备了不锈钢镀铱电极，研究了其在酸性介质中的析氢电催化性能，通过含铅与不含铅镀层析氢性能的比较及测定镀层中铅元素的电子结合能数值，初步研究了Pb^2 离子对镀层性能及电沉积过程的作用，并观察了电极的表面形貌。 相似文献
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F.J.J. Peters 《Learning, Media and Technology》1981,7(2):56-58
Since Prestel and other televised print sources signal a revolution in the presentation of reading material to the public, it is necessary to ensure that the viewers are able to read the material. Are they ready and able to adapt their reading skills to read televised texts? Differences between page print and television print are discussed, with respect to form and style, and recommendations are made about the responsibility of the educational establishment towards the preparation of potential viewers. 相似文献
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重塑当代版画的精神内核 总被引：1，自引：0，他引：1
中国版画有着上千年的历史,但20世纪30年代以前的版画仍然是复制版画。自1931年起,由鲁迅倡导的新兴木刻才开始了我国有创作版画的史页,历经半个多世纪,曾出现过几次高潮时期,产生了一大批优秀的版画家和在国内外有影响有重要价值的版画作品,发展健全了各个版种。中国版画艺术取得了辉煌的成就,但我们也应该看到,当下进入转型时期的中国版画面临一定的困境,一些作品刻意追求版画的形式语言,片面追求作品的印痕美感等本体语言,使作品只停留在技术层面,疏离了版画作品本身的内在精神,缺少深刻的内涵和思想,缺少生命力。"形而上者谓之道,形而下者谓之器"。版画要走出低谷寻求新的发展,由"技"进乎"道"是当务之急。 相似文献
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ABSTRACT The purpose of this study is to investigate the effect of MagAR, an instructional material for teaching magnetism using augmented reality and sensing technology, on students’ academic achievement and learning process, and to identify students’ views about augmented reality. An embedded mixed-method approach was employed in this study. The study’s results suggest that AR learning environments are effective in teaching physics, and facilitate learning by adding visual and textual components to the learning process. In learning activities integrated with AR, the students were observed to participate more, appeared more comfortable, were able to answer questions related to the subject more easily, had increased self-confidence and exhibited higher academic achievement levels in physics. The results suggest that AR should not be considered as an independent learning environment for the teaching of physics, but would be more effective as supplementary to the laboratory environment. 相似文献
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随着电子信息技术的发展,电磁干扰和电磁辐射影响着生产和信息安全以及人们的健康,因此电磁波屏蔽已成为研究的热点。水性导电涂料是一种有效且绿色环保的电磁屏蔽涂料。综述了镍系、铜系、碳系和复合型水性电磁屏蔽涂料的组成、特点、存在的问题及发展状况。镍系水性涂料电磁屏蔽性能和抗氧化性能良好,是当前水性电磁屏蔽涂料的主流;铜系水性涂料导电性好,但抗氧化性差,如何防止铜在水中的氧化是当前铜系水性涂料制备的关键技术问题;碳系水性涂料的耐腐蚀性好,密度小,价格低,但导电性相对较差,电磁屏蔽性能不显著,纳米石墨微片的表面改性处理是增强碳系涂料电磁屏蔽性能的重要手段;复合型导电涂料成本低、电磁屏蔽性能高,是今后水性涂料的主要发展方向。 相似文献
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Gary R. Morrison Steven M. Ross Jacqueline K. O’Dell 《Educational technology research and development : ETR & D》1988,36(2):103-115
Presenting narrative text in computer-based instruction (CBI) is more difficult than in print lessons due to limited screen
resolution and display area. The present research aimed at achieving a more compatible match between lesson content and the
attributes of the presentation media. Subjects received either a print or CBI statistics lesson containing low-density (concise)
narrative text, high-density (conventional) text, or the density type they preferred (learner-control). Results showed the
low-density lesson to reduce completion time relative to the high-density version, while yielding equivalent achievement.
Subjects receiving the lesson in the print mode had shorter completion times and higher achievement than their CBI counterparts.
Attitude results showed that CBI was favorably regarded, but perceived as longer and slow-moving than print. Implications
of results for designing instructional material in accord with CBI attributes and learner characteristics are discussed. 相似文献