Research On Key Techniques Of Recovery Of The Damaged Pptx Document

With the comprehensive popularization of information technology,pptx documents occupy a more and more important position in people's work by virtue of their excellent display effect.When the pptx document is visible to the operating system and the active content is not visible to the user because of a partial data error,it will bring great inconvenience and even loss to users.Therefore,the research of damaged pptx documents repair technology has an important practical significance,this significance is even more significant in the one-way communication environment where the status of the sender and receiver is unequal.For broken pptx documents that cannot be opened or that lose a lot of content information when opened,this paper takes the pptx document as the object of study,to improve the visibility of the damaged pptx document to the user,to solve the key technical problems faced in the repair process,and to study the related algorithm and engineering application of damaged pptx document repair,the main achievements are as follows.1.Aiming at the problem that the pptx document cannot be opened due to a mistake,in order to make as much of the effective content of the pptx document visible to the user as possible,this paper analyzes the pptx document source structure,studies the influence of different types of data error on the opening of the document,and mining the potential redundancy of the pptx document.This paper presents a pptx document repair method based on the effective content data error-tolerant delimitation and the document error-tolerant reconfiguration,verifies the feasibility of the method by experiments.2.Aiming at the technical problem of reducing the bounding time of effective content data,a multimode matching algorithm WM_P based on WM algorithm is proposed in this paper.By analyzing the applicable situation of the classical multimode matching algorithm,combining the source structure of pptx document and the characteristics of pattern set,the dynamic pattern set idea is proposed on the basis of WM algorithm,the jumping mechanism and matching order of WM algorithm are optimized,and the matching efficiency of the algorithm is improved effectively.The experimental results show that the WM_P algorithm has a significant improvement in the fixed-time performance compared with the traditional multimode matching algorithm.3.Aiming at the problem of corrupted compressed data in the OOXML document,an OOXML document compression data error correction algorithm based on cross-domain collaboration is proposed in this paper.This algorithm utilizes the information of physical layer,zip layer and source layer.Coordinated error correcting the text content compression data from bit domain and character value field.According to the error pattern set of compressed data of each bit confidence in the physical layer,the content of the illegal characters in the source file is taken as the decision basis of the target sending sequence.The simulation results show that the algorithm can effectively correct the error of the text content compressing data and improve the visibility of the damaged OOXML document content to the user.4.Design and implementation of the damaged pptx document recovery software.With Visual Studio 2010 as the software platform,the simulation module of broken document generation,effective content extraction and fault-tolerant reconstruction is completed,and the visual operation of broken pptx document recovery is realized.The test results show that the software has a good repair effect on the pptx document.