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This paper describes the architecture of WWW document cooperative authoring system WWWDOC and discusses the document model based on document directory tree. We focus on the structure design and function design of the client-side document directory tree and put forward the solution for implementing the client-side document directory tree.

本文简要介绍了WWW文档协同写作系统WWWDOC的基本结构，讨论了系统中基于文档目录树的层次式WWW文档组织方式的主要思想，着重阐述了WWWDOC客户端文档目录树的结构和功能设计，针对实现中的技术问题进行了讨论并提出了解决方案。

This passage analyzes the advantage and disadvantage of the Boolean Model and the Vector Space Model in information retrieval model: the Boolean Model is simple to realize, but its classification ability is limited and the logic expression formula is strict.

本文分析了信息检索中传统文档特征表示的布尔逻辑模型和向量空间模型的优缺点：布尔逻辑模型虽机制简单、容易实现，但是它的分类能力有限且逻辑表达式过于严格；向量空间模型将文档映射到连续域向量空间，为进一步的权重计算等多元处理提供了基础，但容易忽略文档集合中各个文档的一些共有特征。

This paper has analysed the requirement of the computer-aided compound document production system, builds the structure of computer-aided compound document production system ,studies the information model of compound document object and put forward the develoment scheme of computer-aided compound document production system.

分析计算机辅助复合文档生成系统的需求。创建计算机辅助复合文档生成系统的体系结构。研究复合文档对象的信息模型。提出计算机辅助复合文档生成系统的开发方案。中国图书分类法分类号 F270， TP391

With the development of information industry,document image in digital information management is more and more important.

0引言近年来，随着信息采集技术的不断发展，文档图像在信息的数字化管理中越来越重要，文档图像处理逐渐成了人们的研究热点，例如，中英文文档图像混合识别[1]和基于内容的文档图像倾斜校正[2]等。

Faced with the fact that amount of information increasing ceaselessly, it is more and more urgent to find a way to manage and access information effectively and easily. It is expected that we can collect, archive and refer to any types of documents facilely in a unified document interface.

随着计算机普及和计算机科学技术的发展，并且由于电子文档具备方便性快捷性和易操作性，人们将大部分信息以电子文档形式储存和归档面对与日骤增的海量数据信息，对它们进行有效的整理和管理变得尤其重要人们越来越期望能在统一的文档操作界面上，对各类文档信息进行收集收藏整理归档，方便查询

Secondly, the relevance feedback approach requires relevant documents to be similar to each other. That is, they should cluster. Ideally, the term distribution in all relevant documents will be similar to that in the documents marked by the users, while the term distribution in all nonrelevant documents will be different from those in relevant documents. Things will work well if all relevant documents are tightly clustered around a single prototype, or, at least, if there are different prototypes, if the relevant documents have significant vocabulary overlap, while similarities between relevant and nonrelevant documents are small.

第二，相关反馈方法需要相关文档之间相似，即它们可以聚类，理想地，所有相关文档 term 分布应该相似，相关档即用户标记的文档，同时不相关文档应该与相关文档的 term 分布不同，如果所有的相关文档都很紧凑地聚在一个单一的中心点，或至少有不同的中心点，如果相关文档有明显的词汇重复，同时相关与不相关文档相似性比较小，它才是可行的。

A negotiable document having enhanced security for deterring the generation of counterfeit photocopies of the negotiable document, said negotiable document comprising: a front face; a signature area located on the front face; a first pantographic background design creating a seemingly random background covering a first area of the negotiable document; and a second pantographic design creating a seemingly random background covering the signature area of the negotiable document; and a warning clause, located in the signature area, having a background and print that is visible prior to and after any photocopying of the negotiable document and describing the second pantographic design of the signature area.

可协商文档由于加强了安全性可以防止产生影印的赝品可协商文档。这种可协商文档通常由一个封面，封面上的签名区，一个覆盖可协商文档首部的可缩放的背景设计产生一个表面上随机的背景和一个位于签名区的警告条款，这一条款的背景对于影印的可协商文档是可见的并且在影印文档的前面描绘签名区的第二种缩放设计。

The question's semantic comprehension model combines many natural language processing techniques, including Segmentation and Part-Of-Speech Tagging, the confirmation of the question type, the extarction of keywords and extending, the confirmation of the knowledge unit, Through these works, the intention of the user is holded, which greatly helped the last work of this system. The FAQ-based question similarity match model is implemented by sematic sentence similarity computation, which is improved by our system, this model can answer frequently-asked question fastly and concisely.The document warehouse-base automatic answer fetching model fistly deal with the document warehouse beforehand and construct inversed index, then use high efficient information retrieval model to search in the base and return some relevant documents, lastly, we use answer extraction technique to get the answer from these relevant documents and present it to users.

问句理解分析模块采用分词和词性标注、关键词提取及扩展、问句类型类别确定等自然语言理解技术，实现对用户提问意图的准确理解；FAQ 库问句匹配模块主要采用本系统改进的句子相似度计算方法来实现用户问句的解答，该模块主要用于实现用户常问问题的快速、准确解答；学科文档库答案自动获取模块在对学科文档库建立倒排索引的基础上，采用高效的信息检索模型对索引库进行检索，返回与用户查询表达式相似度较高的文档作为候选文档，针对从文档中直接获取答案难度较大这一问题，本系统采用答案抽取技术来实现问题的最终回答。

Electric seal is a method to sign a document and it is a kind of electric signature, though a document has some difference compare to other kind of data like program, data of a database, according the speciality of a electric signature to a document, such as view what we signed , validate the signature in a document directly, how to archives a document which has been signed, how to read a document has been archived, it points out that a document is exactly some data with some format data, a document could be disparted as two parts, data and format data.

电子印章是应用层的数字签名，是电子签章的一种，由于文档签名与其他类型数据如程序，数据库数据等相比有其特殊性，本文针对文档签名的特殊性，如签名的可见与可证实性，文档的归档特性，文档阅读的方便性等进行了分析，指出文档实际上是一种格式化的数据，可以分为数据与格式两个部分，在此基础上提出了对文档进行签名的要求。

Secondly,the transformed query trees derived by the sequences of the basic transformation operations are used to perform exact embeddings into XML data tree,so as to transform the problem of approximate XML query into the problem of exact XML query for transformed query trees.Thirdly,XML data distribution statistics based similarity degree computing model and optimization algorithm for TopK problem are given.

XML文档具有灵活的表达能力，而这种灵活的表达能力使得不同组织和个人建立的XML文档，难以遵照一个统一的数据模式，即使内容完全相同的文档，不同的组织和个人也很难按照统一的标准来建立结构和标识内容完全相同的XML文档，从而造成了XML文档数据的多样性。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。