Matlab在碎片拼接模型中的算法实现

针对2013年全国大学生数学建模竞赛B题,研究Matlab在规则文档碎片图像拼接复原中的算法设计与实现.     

片断写作训练管见

片断写作是写作能力系统中的基本元素,是中学生获得书面表达能力的关键环节。从片断写作入手,遵循"循序渐进"的写作规律,有益于培养学生的写作兴趣,也便于教师在课内外适时训练。     

Investigating the document structure as a source of evidence for multimedia fragment retrieval

Multimedia objects can be retrieved using their context that can be for instance the text surrounding them in documents. This text may be either near or far from the searched objects. Our goal in this paper is to study the impact, in term of effectiveness, of text position relatively to searched objects. The multimedia objects we consider are described in structured documents such as XML ones. The document structure is therefore exploited to provide this text position in documents. Although structural information has been shown to be an effective source of evidence in textual information retrieval, only a few works investigated its interest in multimedia retrieval. More precisely, the task we are interested in this paper is to retrieve multimedia fragments (i.e. XML elements having at least one multimedia object). Our general approach is built on two steps: we first retrieve XML elements containing multimedia objects, and we then explore the surrounding information to retrieve relevant multimedia fragments. In both cases, we study the impact of the surrounding information using the documents structure.     

对完整式小说的艺术挑战——论刁斗《我哥刁北年表》

小说家刁斗在其长篇小说《我哥刁北年表》中通过对一个处在社会边缘的小人物刁北的50年人生轨迹的展示,侧面揭示了当代中国社会半个世纪以来的历史变迁。小说进而由此对人和体制之间千丝万缕的联系进行了较有意义的彰显和挖掘,揭秘了严肃表象下面的荒诞和滑稽,最终拷问的是整个人类生活和人类社会。小说的形式也富有意味,以"碎片"式的呈现和拼贴的方式在挑战了既有的完整式小说的同时,也刷新和校正了人们对小说观念、功能和使命的认识,充分展现了刁斗小说的先锋性。刁斗对人、人性、世界的洞察力要远比余华更为深邃、透彻和先锋。这是一部作者自己与自己进行精神对话、展开思想交锋的作品,在这里,作者对沧桑世事的纷繁思绪、对真实人性的敏锐洞察,借由不同人的口中道出,不同的腔调、复杂的声音相互交织碰撞,带给我们新异的感受。     

诡谲的时间艺术

叙事文学是时间的艺术，对时间的调度直接关系到作品的艺术成就，改变时间向度，时间碎片策略，强化时间刻度，利用心理，梦境幻觉的描写变异故事时间是文学叙事常用的策略。     

论《老残游记》的小品风格

作为四大谴责小说之一的《老残游记》,虽然在成书形式上留有晚清小说的片段性特征,在叙事模式上采用"新小说"家的第三人称限制叙事,但仍有着高于同时期其他晚清小说的艺术成就,表现为具有在晚明时期走向成熟与辉煌的小品散文的风格。本文将主要以晚明小品的艺术特点作为参照标准,分析这部著作随性适意、真趣自然、抒情感怀、韵高奏雅的审美风格。同时把该书放在晚清小说的环境之中,在对比中凸现其小品风格。     

单克隆抗体研究进展——不同表达系统介绍与比较

单克隆抗体的高度特异性使其在包括细胞生物学、基础医学、临床诊断等领域得到广泛应用,而各种表达系统的开发进一步促进了单克隆抗体及其衍生物的发展.对目前用于生产单克隆抗体的主要表达系统进行综述,同时比较各系统的特点和优缺点.     

以太网交换机常用技术指标及其选择

对网络交换机常用技术参数的分析,结合企业网络需求,阐明企业网络中交换机的选择方法与技巧。     

水稻线粒体DNA的分离纯化及其脉冲电泳分析

为了水稻线粒体基因文库的构建和细胞质雄性不育分子机制的研究,用简化的方法提纯了水稻线粒体DNA,限制性内切酶酶切图谱显示了清晰的带型。HindⅢ酶切产生37条带,Xho酶切产生30条带,该方法重复性好。同时用新技术——脉冲电泳,测定了水稻线粒体DNA的分了量,并就其作为一种新手段,在植物线粒体DNA的异质性、结构和分子大小等方面的研究所具有的优越性进行了讨论。     

Simulation of Fragment Impact on Multi-Layer Targets Using Contact Method

Cased explosives generate highly energetic fragments as their casing breaks up. Due to the complexity of casing fragment related behavior such as embedment, perforation and ricochet, it may be insufficient to use equivalent triangular pressure loading in fragment impact simulations. This simplified method may over- or under-predict the target response. Recently, a procedure using contact techniques has been proposed to overcome such difficulties. It has been shown that the new method has the inherent capability in modeling the multi-piece and multi-hit fragment impact problems in a more realistic way. To investigate the applicability of the proposed method to simulations involving multi-layer penetration, the selected problems of fragment impact on multi-layer targets are described in this paper. It is demonstrated that this method is capable of predicting the complicated multi-layer structural response caused by fragment impact and penetration, Modeling procedures and some technical issues are also discussed.