基于遗传算法的染色体医学图像处理研究

生物医学图像的数字化处理是医学领域中的一个重要的发展方向。其中染色体的自动分析是细胞遗传学研究中急需解决的问题,文中针对自动分析中的前期图像处理提出了基于遗传算法的染色体图像分割方法,该方法充分考虑了待分割染色体的数量及人类显带染色体被明暗交迭的带纹分割为若干不连续的片段等特点。从实验结果可以看出,此方法具有分割速度快、鲁棒性好等优点。     

一种有效的基于运动矢量场的压缩域运动对象分割算法

In this paper an efficient compressed domain moving object segmentation algorithm is proposed, in which the motion vector (MV) field parsed from the compressed video is the only cue used for moving object segmentation. First the MV field is temporally and spatially normalized, and then accumulated by an iterative backward projection to enhance salient motions and alleviate noisy MVs. The accumulated MV field is then segmented into motion-homogenous regions using a modified statistical region growing approach. Finally, moving object regions are extracted in turn based on minimization of the joint prediction error using the estimated motion models of two region sets containing the candidate object region and other remaining regions, respectively. Experimental results on several H.264 compressed video sequences demonstrate good segmentation performance.     

产生不同供应链模式的经济解释

从解耦点对各种供应链模式进行了总结。从资产专用性、创新、顾客需求的多样性和交货期四个方面分析了解耦点对供应链模式的影响,并从解耦点视角阐释了大规模定制和灵捷制造方式的机理。提出了供应链模式细分的方法。最后提出图书销售的细分模式。     

游客特征视域下的南通旅游市场细分与营销策略研究——基于高职“旅游市场营销”课程教学

近年来兴起的旅游热潮,不仅给我国的旅游市场经济带来了活力,同时又对人们的生活方式产生了重大影响。面对旅游新时尚的不断出现,游客在旅游市场上的地位也日俱突出。因此,旅游管理五年制高职"旅游市场营销"的课程教学就显得越来越重要。本文将基于高职"旅游市场营销"的教学,从南通游客特征的角度,尝试对旅游市场进行细分研究,并提出相应的营销策略与建议。     

A deficit in rime awareness in children with Down syndrome

This paper reports 3 studies comparing thereading and phonological skills of childrenwith Down syndrome (DS) and younger normallydeveloping children of similar reading level.In Study 1, the two groups did not differ insight word or nonword reading, but the childrenwith DS did marginally less well on syllablesegmentation, rhyme and phoneme detectiontasks. Group differences in syllable andphoneme awareness appeared attributable todifferences in verbal ability (BPVS, vocabularyknowledge); however, a significant impairmentin rhyme detection remained in an analysis ofsub-groups equated in vocabulary knowledge. Thedeficit in rhyme observed in DS was replicatedin Studies 2 and 3 using simplified tests ofrhyme judgement, with the majority of childrenwith DS performing at chance on the rhymemeasures. In contrast, the two groups did notdiffer in their ability to detect phonemes inany of the 3 studies and performed above chancein initial phoneme detection and alliterationjudgement tasks, although the identification offinal phonemes was at a much lower level. Correlational analyses indicated a relationshipbetween phonological skills and reading inboth groups. However, for children with DS,letter-sound knowledge did not predict readingwhereas it did for normal controls. It issuggested that children with DS do not possessfull phoneme awareness; although they canidentify initial phonemes in words, they do notunderstand phoneme invariance and may rely lesson phonological skills for reading thancontrols.     

A new algorithm of brain volume contours segmentation

This paper explores brain CT slices segmentation technique and some related problems, including contours segmentation algorithms, edge detector, algorithm evaluation and experimental results. This article describes a method for contour-based segmentation of anatomical structures in 3D medical data sets. With this method, the user manually traces one or more 2D contours of an anatomical structure of interest on parallel planes arbitrarily cutting the data set. The experimental results showed the segmentation based on 3D brain volume and 2D CT slices. The main creative contributions in this paper are: (1) contours segmentation algorithm; (2) edge detector; (3) algorithm evaluation. Project (No.69931010) supported by the National Natural Science Foundation of China     

一种提取模糊图像边缘区域的双阈值分割方法

针对目标和背景在同一平面的图像，提出一种双阈值分割方法获取图像由目标过渡到背景的边缘区域，并将提取的边缘区域平均梯度用于图像清晰度的评价，评价效果较好．     

《在密执安北部》的女性文体学分析

海明威的作品素以"硬汉"形象著称,也有评论家认为它具有强烈的女性意识。本文在前人研究的基础上,运用碎片化和及物性分析这两种女性文体学的重要研究方法,分析其短篇小说《在密执安北部》中的女性形象,旨在阐释其女性意识在文本中的具体体现,同时说明女性文体学为读者理解和鉴赏小说语言提供了一个新的视角,为文学批评提供了一种更为客观的分析方法。     

Web页文本信息语义过滤系统设计与实现

传统的文本信息过滤算法仅能实现结构对应层次上的判断,无法体现文本的语义.本文介绍一个能对Web页文本信息进行语义过滤的系统,通过分词、生成语义框架和计算框架间相似度,对相似度大于阈值的Web页进行过滤.试验表明,语义过滤能较好地甄别文本的不同观点,准确度较单纯关键字过滤有明显提高.     

信息源中专业词语的提取方法

通过对人收集、识别词组和短语过程的分析,给出了利用计算机在大量信息源中自动查找词组和短语的方法.在此基础上给出了专业信息资源(如专业书籍、论文等)中专业词组及短语的提取方法,解决了计算机处理短语困难的问题.实验结果证明这是一种有效的方法.