Lab色度系统与人眼视觉感受在黑白度评价中的异同

[目的]探讨Lab色度系统与人眼视觉感受在评价黑白差异中的异同。[方法]采用Lab色度系统光谱光度计测量成对纸片黑白度差异(以L值差值表示),通过正常人群对每对纸片颜色深浅判别的正确率,分析Lab色度系统与人眼视觉感受的关系。[结果]L值差值在0~7时,人眼分辨正确率为20.00%~98.57%,男性较女性高,<40岁人群较>40岁人群高;当L值差值≥1时,67.14%的人视觉感受与Lab色度系统结果一致。[结论]Lab色度系统评价黑白差异时只有其差值≥1时,才能应用于美白化妆品的评价。     

陈莹的五彩人生

一个独特的机会,正出现在一群独特的人面前,他们的选择与成败,将影响到一个“社会群落”的未来生存和发展。他们,就是注定在中国未来的医疗变革中逐渐释放能量的民营医疗机构的投资者与经营者。     

颜色能影响健康

大自然的各种色彩使人产生各种感觉,并可陶冶人的情操。不同的颜色使人产生不同的情绪,从而引起人的心境发生变化。近年来,各国科学家和心理学家对颜色进行了深入细微的研究,并且得出了"颜色能影响健康"的结论。试     

质感美女 唇膏主打

想打造质感美女千金唇,瞬间点亮你的双唇。柔润更丝滑,加上一点创意,让唇妆任意混搭,造型立即千变万化……[1 Style]娇俏性感想一亲芳泽的迷人妆容生活中经常遇到购物及派对场合,总是以娇俏性感又带点娇羞的粉红色泽,能打造出娇美的小女人风格,天真又温柔,让男人无法招架,更想疼爱。     

彩色多普勒超声引导下经皮肝胆管置管引流的体会

我院自2006 年以来对多例临床诊断为阻塞性黄疸的患者,在彩色多普勒超声引导下行经皮肝胆管置管引流(PTCD) 术,效果良好,积累了一些操作体会,现总结如下. 首先,穿刺点的确定,选择合适的目标胆管.目标胆管应选择较粗、较直的胆管.穿刺点胆管的直径应在0.4cm 以上[1],预计导管从穿刺点胆管向胆管内至少能插入4-5cm 深.选择左支或右支系统应根据胆管扩张情况、病情的要求以及操作者的经验而定.左外下支胆管是常选用的目标,优点是穿刺路径较短,不需经过肋间隙,引流导管不易折叠等,缺点则是左肝管和肝总管的夹角在100 度左右,从左肝管向胆总管内置管成功率偏低.     

手术灯用调色温显色隔热滤光片的设计

本文分析了手术灯隔热、色温调整及高显色性的光学技术要求,采用在隔热玻璃基片上镀制多层干涉薄膜,设计了具有升色温、高显色性与隔热性能的手术灯用滤光片,再利用色温与显色指数模拟计算软件,对滤光片膜系及光谱进行了优化设计。采用该滤光片设计的手术灯色温达(4200±150)K,显色指数>92,隔热性>99%,达到了设计要求。     

Color chemistry and the environment.

Dyes, and by extension the various organic compounds used for coloration, including organic pigments and fluorescent whitening agents (FWAs), are among the organic chemicals which we encounter as technological and functional necessities in nearly every sphere of our daily lives. They also greatly influence our mood and thus contribute enormously to the very quality of the lives we lead. At the same time we have come to realize that our achievements and continuing technological progress are only worthwhile provided they pose no hazard to the environment. Tremendous efforts have been undertaken on a worldwide scale to identify, measure, evaluate, and eliminate the undesirable effects of chemicals and, hence, dyes on man and the environment. The present paper deals in particular with the environmental problems associated with the manufacture and use of dyes, problems so complex and so varied in impact that only a discerning appraisal can put them into proper perspective. An attempt is made to define and evaluate these problems and to show, with reference to selected examples, what measures have been and are being implemented to overcome them. Various aspects of the relevant legal regulations, the obligation on manufacturers to take due care in their operations, and product liability are touched upon. This much is certain: A good deal of creative, interdisciplinary effort and meticulous attention to minor detail will be necessary to master existing and future environmental problems in this area. That is the challenge facing all scientists engaged in color chemistry.     

儿童医院室内色彩设计策略

色彩对于儿童是最直接的观察世界、表达自己的手段之一.利用色彩设计来转变医院建筑在儿童头脑中冰冷的形象,可以说是最直接最有效的方式.利用色彩对于人类行为影响的研究结果在儿童医院设计中有实际应用的价值.