近视眼的成像特点与影响因素及矫正

从光学角度说明了近视眼的成像原理，并从医学角度研究了引起近视眼的影响因素及矫正办法．     

古典诗词英译中意境再现的心理空间理论研究——以李煜的《望江南》为例

中国传统美学思想中,诗歌的意境总是被赋予了"空灵、虚化"的色彩,因此在诗歌翻译过程中就如何"再现意境"这个问题上,鲜有可参考的规律可言,对译本质量的评价也渗透着浓厚的主观色彩。以李煜《望江南》的两个英译本为例,从心理空间的认知角度分析古诗英译过程中应注重的问题,特别是意境再现过程中该如何发掘诗词的真切意境,继而抓住重点,再现诗歌的意境,可为心理空间理论的应用拓展一个新的领域。     

Airport automatic detection in large space-borne SAR imagery

A method to detect airports in large space-borne synthetic aperture radar (SAR) imagery is studied. First, the large SAR imagery is segmented according to amplitude characteristics using maximum a posteriori (MAP) estimator based on the heavytailed Rayleigh model. The attention is then paid on the object of interest (OOI) extracted from the large images. The minimumarea enclosing rectangle (MER) of OOI is created via a rotating calipers algorithm. The projection histogram (PH) of MER for OOI is then computed and the scale and rotation invariant feature for OOI are extracted from the statistical characteristics of PH. A support vector machine (SVM) classifier is trained using those feature parameters and the airport is detected by the SVM classifier and Hough transform. The application in space-borne SAR images demonstrates the effectiveness of the proposed method.     

断裂与弥合——解读《忽必烈汗》中的矛盾意蕴

学术界对柯勒律治的名诗《忽必烈汗》这一"残篇"的解读,一直存有争议。该诗表面上诗节之间语义不连贯,实则环环相扣,一脉相承;诗中意象略显突兀,实则和谐统一,互为一体;诗歌格律变换莫测,但是内容与形式相辅相成,音律和谐,音乐感十足。全诗通过丰富的想象力,在断裂中寻求统一,矛盾意蕴十足,使其成为浪漫主义诗歌中的瑰宝。     

多源遥感影像数据融合的理论与技术

目的 探讨多源遥感影像数据融合技术,包括融合概念、融合原理、融合算法、融合效果评价。方法 对于不同空间分辨率、时间分辨率和波谱分辨率的遥感图像进行综合分析,提出像素级、特征级、决策级遥感影像融合的方法及用信息论的理论建立融合影像评价系统。结果 信息融合可分为3个层次：像素级、特征级和决策级融合;像素级融合信息损失最小,决策级融合信息损失最大;像素级融合精度最高,决策级融合精度最低。结论 对同一地区的多源遥感影像数据进行融合,可以产生比单一信息源更准确、更完全、更可靠的估计和判断,可以提高影像的空间分辨率和清晰度,有效提高遥感影像数据的利用率等。     

静止卫星红外云图上卷云与其它云类纹理特征的比较

用灰度共生矩阵方法分析了几种卷云的纹理特征,同时探讨了卷云与中低云、积云群、积雨云纹理特征的异同和相互区分的方法．纵述分析结果,有以下主要结论：用灰度共生矩阵的纹理特征量分析ＧＭＳ云图,邻域窗口的选取以７×７为宜;ＡＳＭ、ＣＯＮ、ＣＯＲ、ＥＮＴ这四个最常用的纹理特征量中,ＡＳＭ和ＣＯＮ更为重要;依ＡＳＭ和ＣＯＮ阈值并参考红外灰度值,可区分几种薄卷云和厚卷云;将纹理特征与光谱特性结合分析,又可区分积云群、中低云、薄卷云;厚卷云（尤其是伪卷云）与Ｃｂ云团的区分,则还是应用红外—可见光双光谱特性加以判识更有效;此外,云区边界对纹理分析的结果会有很大影响．     

Distribution of sand dunes and sand shifts along the southern fringe of the Mu Us Desert since the Ming Dynasty

This article takes the two segments of the Ming Great Walls, Dabian and Erbian, and their associated barracks and forts as geographical references. Based on a detailed scrutiny of historical records of the Ming and Qing dynasties, and on field surveys, the southern boundaries of the sand dunes and sand shifts of the Mu Us Desert in the Ming and Qing dynasties are carefully reconstructed. A comparison of the southern boundaries of the sand dunes and sand shifts of the Mu Us Desert in Ming and Qing with the modern boundary revealed in remote sensing imagery clearly shows that the southern boundary of dunes and shifts in the Mu us Desert has expanded only in a few areas and on a small scale. In the area to the south of Changle Fort, along the direction of annually prevailing winds, sand drifts have penetrated through the Jialu River valley into the loess region and have formed a sand strip of 32 km long and 3 km wide. To the east of Qingping Fort, sand drifts penetrated toward the eastern loess region through the Luhe River valley and have formed another sand strip of 8 km long and 2 km wide. Generally speaking, though the intensity of human activity has been increasing in this area since the Ming Dynasty, the Mu Us Desert has not significantly expanded toward the southeast or southwest. The sand-loess boundary in the southern fringe of the Mu Us Desert has been almost unchanged since the Ming Dynasty.     

关于《镜镜詅痴》中透镜成像问题的再探讨

通过深入分析《镜镜■痴》中描述凸透镜光学持性的“顺三限”、 “侧三限”的涵义和确定方法，指出导致该书作者对透镜光学特性和成像规律错 误认识的主要原因在于将球面反射成像规律直接拓展到球面折射成像的情形。 此外，通过将该书与《远镜说》和《光论》相应内容的比较，认为在１９世纪中 叶的一段时间内，我国的光学发展仍停留在经验的水平之上，《镜镜痴》正是 那个时期我国光学发展水平的标志。郑复光对透镜成像规律独立地进行了系统、 定量的研究，他所建立的光学知识体系在我国光学发展史上的重要地位应予以 充分肯定。     

基于匹配法的卫星云图自动定位微调算法

利用交叉相关系数法,通过设计晴空合成底图模板,并与当前云图进行匹配,以计算由于卫星飘移等问题出现的云图定位偏移量△x、△y,从而实现卫星云图的精确定位.结果表明：对于自动校正卫星云图中较小的定位误差效果（偏移量小于20个像素）的这种方法,可以用于静止卫星接收处理系统中在初定位后的精确校正.该算法从原理上也可用在定位误差较小的极轨卫星云图的准确定位上.匹配区域选择在海陆交界处、岛屿、湖泊和起伏大的山地等地表特征差异明显的区域效果明显.     

视觉心理与室内环境──(Ⅰ)论门厅的室内设计

当建筑设计所提供的室内空间不够理想时,改善建筑功能和协调空间构成的不足就成为室内设计的主要任务,本文通过成功设计的分析,论述视觉心理与室内环境的相互关系。