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ID:31934547
大小:6.42 MB
页数:83页
时间:2019-01-29
《电力系统数据压缩算法的.研究与实现》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、北京化工人学硕:仁学位论文2、Onthebasisofresearchingdeeplydatacompressionbasedonmultiwavelet,anewpowerdatacompressionalgorithmcombineslosslesscompressionandlossycompressionwasproposed.Thealgorithmuseshuffmanlosslesscompressiontoencodethelow-frequencycoefficientsgeneratedbymultiwavelettransform,andcombinesimproved
2、embeddedzero—treemultiwaveletcodingandrunninglengthcodingtocompressthehigh-frequencycoefficients.ThealgorithmhasvariablecompressionrateandbeRercompressionperformance.3、Thresholdcompressionandzerotreecodingbasedon2一Dmultiwavelettransformwereresearcheddeeplyandsimulated.Andanewmethodforcompressingpowe
3、rqualitydisturbancewasproposed.Thealgorithmcutsoffaccordingtodataperiodandreconstructstheeventdata,andthenintroducesembeddedzerotreemultiwaveletalgorithmusedinimagecompressionintocompression.Thealgorithmappliesself-adaptivehuffmancompressiontocompresslow—frequencycoefficientsaswell,andmainscanningse
4、quencesofzerotreecodingarecompressedbyrunninglengthcoding.Sothecompressionrateisgreatlyincreased.4、ThetransmissionsystembasedonGPRSwaschosenintheexperimentofpowerdatacompressionandtransmission.Designedandrealizedthecompresseddatatransmissionbetweentwopartsofthesystem-monitoringterminalandcontrolcent
5、erbasedonClient/ServerpatternandTCP/IPprotoc01.CompletedtheselectionofGPRSmodule,transmissionprotocolandIVABSTRACTGPRSnetworkorganization,anddesignedtheapplicationprotocolabovetransmissionlevel.Theprogramsofsystemofdatacompression,decompressionandGPRSdatatransmissionwererealized.Andmassofexperiments
6、confirmsthereliabilityofthetransmissionprogramsandthegoodperformanceofthecompressionalgorithm.KEYWORDS:datacompression,datatransmission,multiwavelettransform,zerotreecoding,GPRSV北京化工大学位论文原创性声明本人郑重声明:所呈交的学位论文,是本人在导师的指导下,独立进行研究工作所取得的成果。除文中已经注明引用的内容外,本论文不含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体,均已在文中
7、以明确方式标明。本人完全意识到本声明的法律结果由本人承担。作者签名:盈盘一日期:翌:聋么凰互鲴关于论文使用授权的说明学位论文作者完全了解北京化工大学有关保留和,I义)-I-J予但F匕义的规定,即:研究生在校攻读学位期间论文工作的知识产权单位属北京化工大学。学校有权保留并向国家有关部门或机构送交论文的复印件和磁盘,允许学位论文被查阅和借阅;学校可以公布学位论文的全部或部分内容,可以允许采用影印、缩印
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