Markush coding is divided into 3 layers , i . e . natural language layer , formal language layer and extended connectivity table representation layer , to ensure the consistency of markush sructures and the recorded structures in database files . corresponding to the 3lcm , a concept of 2 level documents is adopted . based on these ideas , a set of software named msiis ( markush structure integrated inputting system ) is being developed to process chemical patent documents automatically 在注重提高族性结构数据库系统的一致性和检索效率的原则下，设计了族性结构加工处理方案- - msiis系统，该系统通过建立族性结构三层编码模型( 3clm )和两级文档存贮编码，有效地保证了数据库数据记录与源文档的一致性；通过对初处理文档的优化编译? ?即在最佳展开点展开族性结构? ?生成具有高检索效率的标准文档，这样在数据库记录中就保证了检索的高效率。
Software reuse come up on this background . as an effective approach to solve software crisis , software reuse is getting more and more attention , and with perfection of component specification such as corba , opendoc , ole2 and javabeans , reuse emphases divert to how to develop reusable components , how to manage components and how to improve the component search efficiency 软件复用在这种背景下发展起来,并且作为解决软件危机的有效途径,越来越得到广泛的重视,目前随着构件规范corba , opendoc , ole2 , javabeans的日趋完善,软件复用的重点转移到如何开发复用的构件,如何对构件进行管理,以及如何提高构件的检索效率。
It utilizes the learning advantages of case - based reasoning and the high efficiency of tabu - genetic algorithm to solve the problem of the knowledge - acquiring difficulty and the low retrieval efficiency while enhance the solving ability of the semi - structure and unstructure problems in decision support system 利用案例推理技术的学习优势，结合遗传算法与禁忌算法高效的搜索机制，可望部分解决现存决策支持系统知识获取困难和检索效率低下的问题，提高其解决半结构化和非结构化问题的能力。
The theory and techniques of modeling method related to petri net have been mature today , so we extend some functions based on it and construct the color extended petri net ( cxpn ) suitable to engineering design and project management . considering price , efficiency of retrieving and storage for data model , and degree of technologies maturity and so on , we choose rdbms to store data model of edwfms . because engineering design process has the properties of long duration , this paper presents a design transaction model of long transaction management so that it supports characteristics of engineering design process 由于目前商用工作流管理系统中petri网建模方法的应用已经比较成熟，所以本文以petri网的建模方法为基础，对其进行相应的扩充，构造出适合于工程设计项目管理业务流程的着色扩充petri网( cxpn网)建模方法；综合考虑价格、数据模型的存储与检索效率以及技术成熟度等因素，选取关系数据库对工程设计项目管理工作流( edwfms )系统的对象数据模型进行存储；对于工程设计过程中的长事务管理给出了支持协同工作的扩展事务模型，同时对长事务管理中的几个关键技术进行了研究；提出了基于版本树的资源对象版本管理模型，对复杂的资源版本进行控制；最后，给出了支持分布式工程设计项目管理工作流系统的扩充c s应用体系结构。
There are two kinds of problems related to glossary in ir : one is " original expression " ; the other is " difference of expression " , which impact largely system ' s retrieval efficiency . many approaches have been proposed to solve these problems , and each one has its advantages and disadvantages 在一个检索系统的实现中需要解决两种与词汇相关的问题，即“忠实表达”问题和“表达差异”问题，这两类问题对系统的检索效率有很大的影响，目前虽已有各种的解决方案，但还是存在一些不足。
After analyzing and contrasting the advantages and disadvantages of the traditional classification , and subject with the network classification and subject , the author asserts that using corresponding network information classification , establishing vocabulary list about controlling , utilizing classified subject union to organize network information resource can improve the searching rate of present engine , extremely using dc metadata to edit the network information resource , establishing topic network also is an effective method of organizing network information resource , meanwhile , introducing in detail the resource of marc and dc 笔者在分析对比了传统分类法和主题法与网络分类法和主题法在组织网络信息资源的优缺点后,提出采用统一的网络信息分类法、建立后控词表、运用分类主题一体化组织法等方法来组织网络信息资源可以极大改善现有搜索引擎的检索效率;运用元数据法对网络信息资源进行编目,创建主题网关也是组织网络信息资源的一种有效方法,并对marc格式的元数据和dc格式的元数据加以详细的介绍。
One of importance aspects of dbms , different from others , is that has a capability of processing very large quantities of data . but with dna data increasing in quantity , there have too many problems to deal with the rate of data searches . it has been given more attention gradually to how to improve the efficiency of data searches 一般应用系统采用现有的数据库系统来进行管理，数据库系统区别于其它系统的重要方面之一是dbms具有有效地处理非常大量数据的能力，但是随着dna数据量的增长，数据的检索速度日益捉襟见肘，如何提高数据的检索效率逐渐受到重视，特别是在一些特殊领域对数据的实时性要求较高的情况下，更需要快速的数据检索。
So it presents image interactive retrieval based - on integrated region similarity match . this system is an image retrieval system with interaction and semantic classification of based - on wavelet feature extraction and image integrated region similarity method . compared with other retrieval methods of based - on image content , the method enhances retrieval efficiency by permitting adaptive search and interaction and narrowing search area 为此本文提出基于整体区域相似匹配的图像互动式检索模型，该模型是一个基于小波的特征提取和整体区域相似的、语义分类和互动式方法的图像检索系统，与其他检索方法相比较，此方法允许自适应查找和互动，因此可缩小查找范围，以提高检索效率。
