YCbCr色彩空间的彩色图像光线补偿方法研究

在进行人脸检测过程中,自然光源光照条件和取景设备对图像原本色彩存在干扰影响,这样很难满足人脸识别系统的要求。从图像进行光照补偿处理的方法和效果的研究出发,实验证明:在图像背景相当简单的情况下,采用参考白光线补偿方法可以很好地对色温差图像进行光照补偿处理,消除了光照的影响力,使后续的处理更适合进行人脸识别性能。     

A prospective,randomized crossover study comparing direct inspection by light microscopy versus projected images for teaching of hematopathology to medical students

Instruction in hematopathology at Mayo Medical School has evolved from instructor‐guided direct inspection under the light microscope (laboratory method), to photomicrographs of glass slides with classroom projection (projection method). These methods have not been compared directly to date. Forty‐one second‐year medical students participated in this pilot study, a prospective, randomized, crossover study measuring educational performance during a hematology pathophysiology course. The students were randomized to one of two groups. All students received the same didactic lectures in the classroom and subsequent case‐based review of peripheral blood smears using either laboratory or projection methods, on day one with a crossover to the other method on day two. Pre‐ and post‐test examinations centered on morphology recognition measured educational performance on each day, followed by a questionnaire identifying the student's favored method. There was no significant difference in the pre‐test and post‐test scores between the two teaching methods (rank‐sum P = 0.43). Students overwhelmingly preferred the projection method and perceived it as superior (76%), although post‐test scores were not significantly different. Student's recommended method was split with 50% favoring the projection method, 43% favoring a combined approach, and 23% noting logistical challenges to the laboratory. In this study, the laboratory and projection method were equivalent in terms of educational performance for hematopathology among medicals students. A classroom‐based approach such as the projection method is favored, given the large class sizes in undergraduate medical education, as well as the ergonomic challenges and additional resources required for large group instruction in a laboratory setting. Anat Sci Educ 7: 130–134. © 2013 American Association of Anatomists.     

基于Hysys的LNG轻烃分离流程模拟及参数优化

为了充分利用进口LNG中所潜藏的巨大资源——冷能及C2+轻烃,以流程软件Hysys为工具,按照冷能梯级利用原理,设计了一种LNG轻烃分离流程;并以我国典型进口LNG组分为例,通过模拟计算和优化,乙烷及LPG回收率均在95%左右,而系统能耗仅为1.8MW。     

投影寻踪模型在国民道德体系构建中的应用

针对目前国民道德指数体系构建标准中权重确定的片面性,本文选择5个特征指标作为国民道德指数体系,并提出应用投影寻踪模型对一些国家的道德指数进行量化与排序.分析结果表明:给出了较为准确客观的评价结果,避免了人为确定权重问题,为国民道德体系指数化提供一种计算过程科学直观的新方法.     

低分子量聚丙烯酰胺的合成研究

以丙烯酰胺为聚合单体,过硫酸铵为引发剂,甲酸钠为链转移剂,采用水溶液聚合法制备了低分子量(105~106)的聚丙烯酰胺。由此探讨了单体浓度、引发剂浓度、链转移剂用量、反应温度和反应时间等因素对产物分子量的影响。     

彭学明《娘》文学现象三论

土家族作家彭学明的长篇纪实散文《娘》引发了不同层次、不同领域、不同性别人群的阅读、传播和言说兴趣,其热销和持续发酵,反映了我们这个时代的某些精神症候。首先,《娘》个人性与普世性相融汇的特质,使得它成了不同读者观照历史、政治以及自身家庭伦理关系的一面镜子,也是照亮与作家有着不同生存经历的读者走近历史、探究真相的一盏灯;其次,《娘》提出了如何爱、如何孝顺,以及如何重建家庭伦理的社会问题;此外,《娘》反映了"我"接受现代意识的规训这一深层原因,"我"努力寻求他者认同、终于失效以至返回娘代表的传统意识的过程,是现代社会中我们的共同境遇。故而,《娘》成为一种文学现象,是一种必然。     

A passion for portraits: Elizabeth Cay's pastels

Elizabeth Cay (1771–1831), the grandmother of the Scottish physicist James Clerk Maxwell (1831–1879), was a talented amateur pastellist; several of her pastel portraits survive as does her set of pastels. She studied with Archibald Skirving (1749–1819), a Scottish miniature painter who later in life turned to larger-scale portraiture in pastel and served as drawing master to the Edinburgh elite. Cay's pastels are not fabricated sticks but consist of powdered pigment housed in various glass and ceramic containers and were apparently applied by stumps, still in her workbox, or brushes. The Cay color samples were identified by spectrographic analysis, polarized light microscopy, and microchemical tests which, in addition, indicated that a number of pigment mixtures present gave specific hues in keeping with earlier treatise accounts of the preparation of a pastel gamut for practical use. Elizabeth Cay's pastel workbox may be rare surviving evidence of one way, more common that we appreciate today, in which amateurs, and perhaps professionals, practiced pastel painting.     

荷重整体动作力量素质多种能力的理论研究

在现代力量素质等张负重训练理论与方法中，以荷重作为练习强度及确定发展不同类型力量素质负荷结构的主导因素，对于实现力量素质训练的科学化有一定的局限性。据此提出并建立了运动员荷重状态下整体动作力量素质多种能力的理论，为同一动作结构动力性力量素质训练的定向化、定量化、个体化提供了一种新的理论与方法。     

浅析有氧运动与减肥的关系

通过对有氧运动、减肥等科学阐述，明确揭示了有氧运动促进减肥的原理、方法及注意事项，以期提高人们对此方面的科学认识，进而促进健康水平的发展。     

东莞市中学生隐性肥胖的调查与对策

通过对广东省东莞市后街中学初、高中的新生进行测量分析,发现在初、高中生中肥胖和隐性肥胖男、女生部占有一定的比例,组织隐性肥胖者进行为期3个月的特定运动处方训练,证明通过运动处方训练,大部分隐性肥胖者可转为标准体重,降低其脂肪含量,并能提高其部分身体素质。由此说明,中学生肥胖可以即早发现其趋势并采用相应的运动处方即时进行预防。据此,为研讨中学生的体质健康和预防肥胖提供一定的参考资料和依据。