We tested 288 pieces of the polished cabochon jadeite-jade with high quality green and smooth surfaces using the colorimeter Color i5 based on the CIE 1976 L＊a＊b＊ uniform color space. The color changes after altern...We tested 288 pieces of the polished cabochon jadeite-jade with high quality green and smooth surfaces using the colorimeter Color i5 based on the CIE 1976 L＊a＊b＊ uniform color space. The color changes after alternating three CIE standard light sources D65, A and CWF were compared, and the degree of metamerism was evaluated. The results show that the CIE standard light sources D65, A and CWF increase the chroma of green and turn bluish green into vivid green, which are similar or to nearly colorless and transparent glass-like samples with fine textures. When the three light sources were individually alternated, the lightness of the jadeite-jades showed little change, but the tone changed significantly. Metamerism occurred only in 3 pairs among the 16 samples that were selected by cluster analysis for quality, and the metamerism colors were highly consistent of L＊D65∈（43.47, 46.75）, C＊D65∈（65.20, 68.80） and ho＊D65∈（138.10, 140.23）. We can conclude that the jadeite-jade green gradually turns to blue when the color temperature of the light source increases. But when considering both the light sources and the samples, D65 is more suitable to be the light source of jadeite-jade green when compared with the light sources CWF and A. Compared with the CIE standard green and high chroma green, high-quality jadeite-jade green has a slight yellow tone, low lightness and high chroma. The special metamerism index decreased to 1 when the light source alternated among D65, A and CWF. Therefore, the color of jadeite-jade green might be slightly influenced by alternating of the light sources.展开更多
采光系数和采光均匀度是评价建筑采光质量的重要指标。根据中国标准《采光测量方法》(GB/T 5699—2008)的相关规定,采光测量的天空条件应选择CIE标准全阴天空。但是,中国地域辽阔,各地光气候有很大区别,很难找到合适的天气条件进行采光...采光系数和采光均匀度是评价建筑采光质量的重要指标。根据中国标准《采光测量方法》(GB/T 5699—2008)的相关规定,采光测量的天空条件应选择CIE标准全阴天空。但是,中国地域辽阔,各地光气候有很大区别,很难找到合适的天气条件进行采光测量。为了能在不同天气情况下进行采光测量,扩大其通用性,选择全阴天和全晴天时在同一地点、同一时间段对同一栋建筑实体模型的不同朝向(东南西北)分别进行采光测量,并将模型导入DIALux evo 6.1软件测试模拟。结果表明,全阴天和全晴天,采光口朝东向和北向的采光系数在10∶00—15∶00之间由高到低变化,西向和南向的采光系数则相反,数据在12∶00—13∶00之间产生交叉。全阴天北向的采光系数与软件模拟结果最为接近,其次为全晴天北向,全晴天东向和南向的偏差最大。天气和朝向对采光均匀度的影响均较小。展开更多
In this paper,molecular dynamics simulation was applied to synthesize a layered structural color from Konjac glucomannan（KGM） and the effect of particle diameter and temperature were investigated. A series of method...In this paper,molecular dynamics simulation was applied to synthesize a layered structural color from Konjac glucomannan（KGM） and the effect of particle diameter and temperature were investigated. A series of methods such as high voltage electric field treatment,the transfer matrix method and the CIE standard colorimetric system were simulated to obtain the chromaticity coordinates and to analyze the color changes of KGM particles. The results revealed that as the particle diameter increases,the structural color of KGM particles deflects towards the yellow wavelength within the visible spectrum; and as the reaction temperature rises,the structural color deflects towards the blue and violet wavelengths within the visible spectrum.展开更多
基金financial support by "the Fundamental Research Funds for the Central Universities"
文摘We tested 288 pieces of the polished cabochon jadeite-jade with high quality green and smooth surfaces using the colorimeter Color i5 based on the CIE 1976 L＊a＊b＊ uniform color space. The color changes after alternating three CIE standard light sources D65, A and CWF were compared, and the degree of metamerism was evaluated. The results show that the CIE standard light sources D65, A and CWF increase the chroma of green and turn bluish green into vivid green, which are similar or to nearly colorless and transparent glass-like samples with fine textures. When the three light sources were individually alternated, the lightness of the jadeite-jades showed little change, but the tone changed significantly. Metamerism occurred only in 3 pairs among the 16 samples that were selected by cluster analysis for quality, and the metamerism colors were highly consistent of L＊D65∈（43.47, 46.75）, C＊D65∈（65.20, 68.80） and ho＊D65∈（138.10, 140.23）. We can conclude that the jadeite-jade green gradually turns to blue when the color temperature of the light source increases. But when considering both the light sources and the samples, D65 is more suitable to be the light source of jadeite-jade green when compared with the light sources CWF and A. Compared with the CIE standard green and high chroma green, high-quality jadeite-jade green has a slight yellow tone, low lightness and high chroma. The special metamerism index decreased to 1 when the light source alternated among D65, A and CWF. Therefore, the color of jadeite-jade green might be slightly influenced by alternating of the light sources.
文摘采光系数和采光均匀度是评价建筑采光质量的重要指标。根据中国标准《采光测量方法》(GB/T 5699—2008)的相关规定,采光测量的天空条件应选择CIE标准全阴天空。但是,中国地域辽阔,各地光气候有很大区别,很难找到合适的天气条件进行采光测量。为了能在不同天气情况下进行采光测量,扩大其通用性,选择全阴天和全晴天时在同一地点、同一时间段对同一栋建筑实体模型的不同朝向(东南西北)分别进行采光测量,并将模型导入DIALux evo 6.1软件测试模拟。结果表明,全阴天和全晴天,采光口朝东向和北向的采光系数在10∶00—15∶00之间由高到低变化,西向和南向的采光系数则相反,数据在12∶00—13∶00之间产生交叉。全阴天北向的采光系数与软件模拟结果最为接近,其次为全晴天北向,全晴天东向和南向的偏差最大。天气和朝向对采光均匀度的影响均较小。
基金supported by the National Natural Science Foundation of China(31271837 and 31471704)the major project of Fujian Industry-Academy-Research Cooperation(2013N5003)+1 种基金the Natural Science Foundation(2011J0101)of Fujian Province,the Science and Technology Program under Fujian Provincial Department of Education(JA13439 and JA13440)the Science and Technology Program under Fujian Provincial Department of Forestry(20135)
文摘In this paper,molecular dynamics simulation was applied to synthesize a layered structural color from Konjac glucomannan（KGM） and the effect of particle diameter and temperature were investigated. A series of methods such as high voltage electric field treatment,the transfer matrix method and the CIE standard colorimetric system were simulated to obtain the chromaticity coordinates and to analyze the color changes of KGM particles. The results revealed that as the particle diameter increases,the structural color of KGM particles deflects towards the yellow wavelength within the visible spectrum; and as the reaction temperature rises,the structural color deflects towards the blue and violet wavelengths within the visible spectrum.
