A simple rectification method for linear multi-baseline stereovision system

The linear multi-baseline stereo system introduced by the CMU-RI group has been proven to be a very effective and robust stereovision system. However, most traditional stereo rectification algorithms are all designed for binocular stereovision system, and so, cannot be applied to a linear multi-baseline system. This paper presents a simple and intuitional method that can simultaneously rectify all the cameras in a linear multi-baseline system. Instead of using the general 8-parameter homography transform, a two-step virtual rotation method is applied for rectification, which results in a more specific transform that has only 3 parameters, and more stability. Experimental results for real stereo images showed the presented method is efficient.     

隐性的阐释--谈荷兰风俗画在欧文名作《瑞普·凡·温克尔》中的运用

本文以画面的运用及其引起的道德张力为切入点,探讨了华盛顿·欧文名作《瑞普·凡·温克尔》与荷兰风俗画的亲缘性,说明了前者无论在艺术形式上还是在潜在的道德价值上都是后者的"隐性的阐释".     

Laplacian分布表面超声背向散射的研究

本文假设随机粗糙表面符合Ｌａｐｌａｃｉａｎ分布,建立了来自粗糙表面的背向散射声强与物体表面粗糙度、超声频率和掠射角之间的闭形解析表达式．其结果的近似程度在大掠射角时,比文献预言的更好．     

柔性结构振动主动控制的气浮机动台实验系统

针对目前存在的对具有刚性运动基的刚体－柔性体耦合结构的振动主动控制缺乏深入研究的状况,阐述了建立该实验系统的意义,详细介绍了气浮机动台实验系统的各组成部分及作用,整个系统已基本建成,使运动基在气浮状态下以不同的角速度实现不同的角位移。     

Comparison between varietal purity and zymogram purity in maize

The zymogram purity of 5 inbred lines, 7 single cross hybrids and 7 single cross hybrids mixed with their parental lines was examined by a vertical discontinous polyacrylamide gel electrophoresis. Results indicate that the maize hybrid impurity is mainly composed of three parts:mixed with the seeds from parents or other source, contaminated with the seeds resulting from unknown pollination and variable in genetic background. It was found that the varietal purity is higher than the zymogram purity and they showed a linear relationship. The regression mefficient (γ) between varietal purity and zymogram purity is 0.898 2. There is an average of 3.5 % variable in the field. However, using a known rate of the mixed seeds, their regression mefficient is 0.999 9. It was also found that the examinational mix rate is 0.33% higher than the known mix rate. The seedling rate of the single cross hybrids is 85.71 %, but that of hybrids mixed with their parental lines is only 77%. Therefore, it is reasonable to claim that zymogram purity is lower than the varietal purity.     

邻苯二甲酸二丁酯的简便合成方法

在亚硫酰氯存在下,邻苯二甲酸与丁醇反应,高产率生成邻苯二甲酸二丁酯．与经典方法相比,该法具有操作简便,反应时间短,产率高等优点．     

蔗糖酯的合成及应用

介绍了蔗糖酯的各种合成方法及其应用情况，针对这些合成方法进行了评价．目的在于促进我国对蔗糖酯合成方法的研究及生产，在众多领域扩大它们的应用范围．     

对氨基苯甲酸乙酯与苯乙酮和芳香醛的Mannich反应

报道了对氨基苯甲酸乙酯与苯乙酮和芳香醛的Ｍａｎｎｉｃｈ反应．在少量浓盐酸催化下，上述反应物在无水乙醇中于９～２１℃可以发生Ｍａｎｎｉｃｈ反应，直接生成９个新的Ｍａｎｎｉｃｈ碱，１－苯基－３－芳基－３－（４－乙氧羰基苯胺基）丙酮，产率５２％～９９％．产物的结构均经元素分析、ＩＲ和ＭＳ鉴定．还讨论了Ｍａｎｎｉｃｈ碱的生成条件     

价值工程在挖泥船泥浆泵改造中的应用

泥浆泵是挖泥船的主要设备之一．其泵壳、叶轮和衬板由于磨损寿命较短．本文通过功能和成本分析，改进了设计，并且进行了试验，取得了显著的经济效益．