Some systems are lack of data transformation ability , so data transformation algorithms are devised to transform data from source xml document to target ( 6 ) some operations of xml documents in data integration are defined 针对普通xml文档转换系统缺少数据抽取和转换过程,增加匹配后的数据抽取和数据转换功能,设计了相关的抽取和转换算法。 ( 6 )定义了在数据集成中对xml文档的基本操作。
A mathematical transformation algorithm precisely reconstructs the spectrum with a 4x signal - to - noise improvement as compared with a slit - based system equipped with identical source , grating and detector components , and 70 - 80x greater than with a fiber input of equivalent resolution 一个数学转换元算法则精确地改造了光谱,在使用相同的光源、光栅和探测原件的情况下,与传统的基于狭缝技术的系统相比,新的光谱仪将信噪比提高了四倍,而进光量提高70 - 80倍。
Leading by the nc bend tube welding jig design flow , develop a series of tools in the cad software platform , then construct the nc bend tube welding jig cad system under the tools collection ; 2 ) use the reverse technology of nc bend tube ’ s modeling , aim to the most general nc bend tube , reevaluation the bend tube ’ s essential feature by using the vector transformation algorithm , and establish bend tube model above this foundation 论文的主要工作包括以下几个方面: 1 )提出了数控导管焊接夹具cad系统框架。在数控导管焊接夹具的设计流程引导下,于cad软件平台上开发系列工具集,进而在工具集支撑下构建数控导管焊接夹具cad系统; 2 )应用了数控导管逆向建模技术。
Based on the above works , the distance education resource warehouse is improved in this thesis by adding the storage and management of media material metadata and learning content hierarchy graph ; the learning model of distance education system is improved and introduced . the transformation algorithm between learning content hierarchy graph and and / or tree is given . finally , the researc 在以上理论研究成果的基础上,对现有的远程教育资源库进行了改进,增加了媒体素材库元数据和学习内容层次图的存储和管理;同时对远程教育系统学习模型进行了改进,给出了改进后的远程教育系统学习模型示意图,并给出了学习内容层次图和and / or树之间的构造转换的具体算法。