contrast of luminance

The result of Studying the relation among the relative visual sense reaction time,relative illuminant efficiency and multiplication coefficient of road illumination light source, the result indicate that they are the different expressing forms of the light source light spectrum power distribution influences on the visual sense.

研究了道路照明光源的相对视觉反应时间、相对发光效率和乘法系数之间的关系 ,结果表明 ,它们均是光源光谱功率分布对视觉影响的不同表示形式。

Compared with the common coatings, the nano compound coatings show better comprehensive performances in terms of contrast ratio, scrab resistance, adhesion, stain resistance, fungus resistance, age resistance and et al.

通过与普通涂料的对比,阐述了纳米复合涂料在对比率、耐擦洗性、附着力、耐污染性、抗菌性、耐老化性等方面的突出表现。

The influence of amuont of EVA emulsion on film washability,amount of sierozem powder on contrast ratio are discussed.

介绍了使用灰钙粉和乙烯 -乙酸乙烯酯共聚物 (VAE)乳液配制VAE乳胶漆的技术 ,包括原材料的选用、配方和配制程序等 ;探讨了VAE乳液用量对涂料耐洗刷性的影响 ,灰钙粉用量对涂料对比率的影响以及用加速升温贮存试验和常温贮存试验测试乳胶漆的贮存稳定性的结果 ;综合评价了乳胶漆的性能特征和应用优势 ,并分析了灰钙粉提高涂料性能的原

Objective To measure the translucency parameter(TP),masking effect(ME),and contrast ratio(CR) of opal porcelain of Ceramco,Shofu,Noritake,and Vita,and to compare the correlations among the three transmission parameters,in order to provide reference for selecting opal porcelain correctly.

目的测量Ceramco、Shofu、Noritake和Vita等4个品牌22种不同颜色的乳光瓷样本的透明度、对比率和遮色效果3个透射参数,并比较其相关性,为正确选择及使用乳光瓷粉提供参考。