阴极射线管色度转换的神经网络模型

利用神经网络技术实现了从阴极射线管(CRT)的R、G和B空间到CIE的标准色度空间的转换.用拟牛顿法训练网络模型,建立了从CRT的R、G和B到CIE的X、Y和Z色度空间变换的3 10 10 3神经网络模型.采用7点LOG空间分布方案的343个训练样本建模的试验表明,收敛性与训练时间及模型精度均优于前人采用3~4个隐层的方案,343个训练样本、216个检验样本和64组测试样本的平均转换精度分别为0.6个CIELUV色差单位,说明该模型的泛化能力很好.     

浅谈平面设计中图形、文字及色彩的运用

在平面设计中基本元素相当于你作品的构件,每一个元素都要有传递和加强传递信息的目的。图形、文字和色彩更是平面设计的主要构成部分。简洁明快的图形语言,是达到强烈视觉冲击力的必要条件;文字在平面设计中同样重要,其本身具有图形要素。色彩的合理运用可以使平面设计作品更加精彩。     

经济全球化视域中的邓小平"和平与发展"时代观

邓小平"和平与发展"的时代观,以经济全球化的视域加以审视,其科学性的底蕴十分浑厚各国发展经济必须有一个和平稳定的国际环境;发展问题是落后国家与发达国家面临的共同问题;和平与发展内涵中的传统与非传统安全问题仍须严加防范;但包括美国在内的五大合力正在促进国际和平力量不断增长.在新的世纪如何抓住和平发展机遇不放?辩证理智地看待现有世界经济体制的浓厚西方色彩与美国对和平与发展潮流的主导作用,是二个至为关键的坚持改革开放的大问题.     

彩色图像脉冲噪声的自适应矢量滤波

提出了基于噪声像素检测的自适应矢量滤波器的新方法,该法对图像中噪声像素进行检测时,仅对噪声像素进行矢量滤波,而对非噪声像素则保持其原值不变,并可根据图像噪声情况自适应地选择滤波窗口。新滤波器能有效地滤除彩色随机脉冲噪声,并保持图像边缘与细节,其性能优于经典的矢量中值滤波器、方向一距离滤波器、方向一幅度矢量滤波器等非线性滤波器。     

色彩写生中的构成

色彩写生中画面与色彩构成意识的确立、运用,使学生作画由对物象的表象特征的描摹状态,进入到主动把握对象、重组并构成艺术形象的状态.本文从色彩概括及平面化意识、设计色彩等几个方面来探讨色彩写生画面构成的多样性这一问题.     

日本色彩发展史概观

从色彩名的由来入手,论述学者们对它们的不同见解,然后从远古时代到现代按照日本历史时代分门别类地阐明不同历史时代色彩的不同特点,发掘隐藏于色彩背后的深厚的民族文化心态和感情色彩。     

Nested combination tests with a time‐to‐event endpoint using a short‐term endpoint for design adaptations

Adaptive trial methodology for multiarmed trials and enrichment designs has been extensively discussed in the past. A general principle to construct test procedures that control the family‐wise Type I error rate in the strong sense is based on combination tests within a closed test. Using survival data, a problem arises when using information of patients for adaptive decision making, which are under risk at interim. With the currently available testing procedures, either no testing of hypotheses in interim analyses is possible or there are restrictions on the interim data that can be used in the adaptation decisions as, essentially, only the interim test statistics of the primary endpoint may be used. We propose a general adaptive testing procedure, covering multiarmed and enrichment designs, which does not have these restrictions. An important application are clinical trials, where short‐term surrogate endpoints are used as basis for trial adaptations, and we illustrate how such trials can be designed. We propose statistical models to assess the impact of effect sizes, the correlation structure between the short‐term and the primary endpoint, the sample size, the timing of interim analyses, and the selection rule on the operating characteristics.     

中国古典诗词色彩论

中国古典诗词借用丹青的手法，摘取了大自然的关色，赋予了语言以五彩缤纷的色彩；描绘了自然绚丽景色，澶泄了主体内在的复杂感情。     

Skin Color and Intelligence in African Americans: A Reanalysis of Lynn's Data

Finding a modest yet statistically significant correlation between skin tone and vocabulary test scores among African Americans, Lynn (2002) concludes that intelligence in African Americans is significantly determined by the proportion of Caucasian genes (p. 365). In this reanalysis of Lynn's data, I demonstrate that his bivariate association disappears once childhood environmental factors are considered. Therefore, a genetic link between skin color and intelligence among African Americans cannot be supported in his data. Investigators seeking to establish a genetic connection between racial ancestry and intelligence must move beyond simple bivariate results to address the confounding influence of environmental conditions that affect cognitive development.     

工笔重彩课程教学改革的几点设想

从分析当前工笔重彩课程教学的弊端出发,对工笔重彩课程教学的教学模式、教学核心、课程衔接等三个方面做出对比分析,提出对工笔重彩课程改革的建议和设想。