迭代算法IterativemethodsKA：Kaczmarz算法KA:Kaczmarz’sAlgorithmART：代数重建技术ART:AlgebraicReconstructionTechniqueSIRT：同步迭代重建技术SIRT:SimultaneousIterativeReconstructionTechniqueCG：共轭梯度算法CG:ConjugateGradientmethodLM：Levenberg-Marquardt算法LM:Levenberg-Marquardtmethod全局优化算法

本程序主要对SIRT算法进行Matlab实现，共包含三个m文件。
运行时，首先执行GenerateSIRTSystemMatrix.m生成系统矩阵A。
然后，每需要重建一副图像时运行一次SIRTOnce.m或SIRTOnceSTD.m。
其中，SIRTOnce.m对应了固定步长的SIRT算法，SIRTOnceSTD.m为采用最速下降原理对迭代步长进行优化以后的SIRT算法，并采用FBP算法进行对比重建。

APP集成了科大讯飞语义理解、语音合成、语音听写功能类。
APP主要包含了智能问答功能和语音控制功能。
智能问答功能主要是实现像Siri一样的功能；
语音控制功能主要是通过设置控制命令来实现不同输入语音发送不同控制命令。
通信手段为蓝牙

MIMOOFDMSimulator:OFDM.m:OFDMSimulator(outerfunction)create_channel.m:GeneratesaRayleighfadingfrequency-selectivechannel,parametrizedbytheantennaconfiguration,theOFDMconfiguration,andthepower-delayprofile.svd_decompose_channel.m:Sincefullchannelknowledgeisassumed,transmissionisacrossparallelsingularvaluemodes.Thisfunctiondecomposesthechannelintothesemodes.BitLoad.m:Applythebit-loadingalgorithmtoachievethedesiredbitandenergyallocationforthecurrentchannelinstance.ComputeSNR.m:Giventhesubcarriergains,thissimplefunctiongeneratestheSNRvaluesofeachchannel(eachsingularvalueoneachtoneisaseparatechannel).chow_algo.m:ApplyChow'salgorithmtogenerateaparticularbitandenergyallocation.EnergyTableInit.m:GiventheSNRvalues,formatableofenergyincrementsforeachchannel.campello_algo.m:ApplyCampello'salgorithmtoconvergetotheoptimalbitandenergyallocationforthegivenchannelconditions.ResolvetheLastBit.m:Anoptimalbit-loadingofthelastbitrequiresauniqueoptimization.modulate.m:Modulatetherandominputsequenceaccordingtothebitallocationsforeachchannel.ENC2.mat:BPSKModulatorENC4.mat:4-QAMModulator(Graycoded)ENC16.mat:16-QAMModulator(Graycoded)ENC64.mat:64-QAMModulator(Graycoded)ENC256.mat:256-QAMModulator(Graycoded)precode.m:Precodethetransmittedvectorateachtimeinstancebyfilteringthemodulatedvectorwiththeright-inverseofthechannel'srightsingluarmatrix.ifft_cp_tx_blk.m:IFFTblockoftheOFDMsystem.channel.m:ApplythechanneltotheOFDMframe.fft_cp_rx_blk.m:FFTblockoftheOFDMsystem.shape.m:Completethediagonalizationofthechannelbyfilteringthereceivedvectorwiththeleft-inverseofthechannel'sleftsingularmatrix.demodulate.m:Performanearestneighborsearchknowingthetransmitconstellationused.

林sirCCIERS中文笔记EIGRPEIGRP.pdfEIGRP五种包.pdf关于EIGRP中用到的时间.pdf关于EIGRP建立邻居的6个过程.pdf关于EIGRP的Metric值.pdf关于认证.pdf等价负载均衡.pdf自动汇总.pdf被动接口.pdf路由的主动状态和被动状态.pdf默认路由.pdfL2ACC&TRUNK&QinQ.pdfBPDU.pdfDTP.pdfEtherChannelPortGroups.pdfMultipleSpanningTreeProtocol.pdfRapidSpanningTreeProtocol.pdfSpanning-Feature.pdfSTP判决.pdfSTP的5种状态.pdfVLANTrunkingProtocol.pdfvlan.pdf交换机接口&互联.pdf交换机的工作原理.pdf以太网.pdf关于2-3层转发.pdfVPCVSS,IRF,VPC，VDC总结.pdfwhite_paper_c11-516396.pdfwhite_paper_c11_589890.pdfWANPPP.pdfPPPOE.pdf帧中继.pdf高级数据链路控制HDLC.pdfOSPFOSPF.pdfOSPF三张表.pdfOSPF之LSA.pdfOSPF包和计时器.pdfOSPF多区域.pdfOSPF杂.pdfOSPF特殊区域.pdfOSPF网络类型.pdfOSPF邻接关系.pdf选路.pdfRIPdistribute.pdfinput-Q.pdfRIPTimer.pdfRIP.pdfRIPv1收发原则.pdfRIPv1收发原则实验.pdfRIPV2的验证.pdfRIP版本.pdfTriggered.pdfvalidate.pdf偏移列表.pdf缺省路由.pdf被动接口.pdf路由汇总.pdf

这篇文章原文发表在可用性大师JakobNielsen的网站上，系统介绍了如何选择合适的用户体验研究方法。
好的研究方法要在恰当的时间用到恰当的地方才能发挥其应有的效果，切忌手里有把锤子就看什么都像钉子。
摘要：用户体验研究当前已经可以解答相当广泛的问题。
通过在一个3维坐标系以及典型的产品开发阶段中列出各种可用的研究方法，可以了解到什么时候应当使用哪种方法。
用户研究领域有着相当广泛的研究方法，这是件好事（没准也是件坏事）。
从那些已经广泛验证的方法，例如可用性实验室研究，到那些近些时候才发展出来的方法，比如合意性（desirability）研究（用来测量审美需求）你不能在所有的项目中应用所有的方法，但

西门子全系列软件授权工具SimEKBInstallv2018.11.14最新绿色版SimEKBInstall是一款西门子软件授权key，可对西门子下的所有软件进行破解授权，如：Wincc、Step5、Step7、TIAPortal(博途)等等，本站不仅为大家提供了SimEKBInstall下载地址，同时也为大家带来了西门子全系列软件授权工具的使用方法，欢迎有使用西门子软件的朋友们前来下载使用。
功能介绍SimEKBInstall(西门子授权软件)是一款针对西门子软件的授权过期问题的解决辅助工具，支持西门子旗下的全部软件进行授权使用，运行西门子授权软件后会自动检测你当前安装在计算机上的西门子软件，并自动给出推荐的授权。
使用方法:西门子授权工具SimEKBInstall使用方法有两种：第一种：左侧有所有可授权的分类栏目，选择某个需要授权的软件版本，之后点击右侧的选择——安装长密钥即可；
第二种：点击“需要的密钥”勾选全部，然后选择安装长密钥；
详细步骤1、在软件界面的左上角处选择要安装的盘符，如C盘。
2、在软件界面左侧栏目内快速查找要按照的授权软件名称，并单击选中。
3、在软件界面的窗口中部，选择要安装的授权，并在前面打上勾。
4、最后点击软件界面上面的“安装长密钥”按钮即可安装，也可点击“安装短密钥”按钮进行安装，不影响授权使用，但是前提是，安装短密钥对应的表框里面，要有短密钥才可以。
许可证类型：网络中的浮动授权"SIFL"工作地的单一授权"SISL"365天的租用授权"SIRT"

Achecksumisanalgorithmthatscansapacketofdataandreturnsasinglenumber.Theideaisthatifthepacketischanged,thechecksumwillalsochange,sochecksumsareoftenusedfordetectingtransmissionerrors,validatingdocumentcontents,andinmanyothersituationswhereitisnecessarytodetectundesirablechangesindata.Forthisproblem,youwillimplementachecksumalgorithmcalledQuicksum.AQuicksumpacketallowsonlyuppercaselettersandspaces.Italwaysbeginsandendswithanuppercaseletter.Otherwise,spacesandletterscanoccurinanycombination,includingconsecutivespaces.AQuicksumisthesumoftheproductsofeachcharacter'spositioninthepackettimesthecharacter'svalue.Aspacehasavalueofzero,whilelettershaveavalueequaltotheirpositioninthealphabet.So,A=1,B=2,etc.,throughZ=26.HereareexampleQuicksumcalculationsforthepackets"ACM"and"MIDCENTRAL":ACM:1*1+2*3+3*13=46MIDCENTRAL:1*13+2*9+3*4+4*0+5*3+6*5+7*14+8*20+9*18+10*1+11*12=650InputTheinputconsistsofoneormorepacketsfollowedbyalinecontainingonly#thatsignalstheendoftheinput.Eachpacketisonalinebyitself,doesnotbeginorendwithaspace,andcontainsfrom1to255characters.OutputForeachpacket,outputitsQuicksumonaseparatelineintheoutput.SampleInputACMMIDCENTRALREGIONALPROGRAMMINGCONTESTACNACMABCBBC#SampleOutput46650469049751415

Don'tMakeMeThink第3版英文版文字版全彩色觉得好请留评论DontmakemeThinkRevisitedACommonSenseapproachtoWebUsabilityCopyrighto2014SteveKrugNewriderswww.newniders.comToreporterrorspleasesendanotetoerrata@peachpit.comNewridersisanimprintofpeachpitadivisionofpearsoneducationEditor:ElisabethbayleProjecteditor:NancyDavisProductioneditor:lisabraziealCopyEditorBarbaraFlanaganInteriorDesignandComposition:RomneyLangeIllustrationsbymarkMatchaandMimiHeftFarnhamfontsprovidedbyTheFontbureauInc.(www.fontbureau.comNoticeofRightsAllrightsreservedNopartofthisbookmaybereproducedortransmittedinanyformbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofthepublisher.Forinformationongettingpermissionforreprintsandexcerpts,contactpermissions@peachpit.comNoticeofliabilityTheinformationinthisbookisdistributedonan"asisbasiswithoutwarranty.whilileeveryprecautionhasbeentakeninthepreparationofthebook,neithertheauthornorPeachpitshallhaveanyliabilitytoanypersonorentitywithrespecttoanylossordamagecausedorallegedtobecauseddirectlyorindirectlybytheinstructionscontainedinthisbookorbythecomputersoftwareandhardwareproductsdescribedinittrademarksItsnotrocketsurgeryisatrademarkofStevekrugManyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andpeachpitwasawareofatrademarkclaim,thedesignationsappearasrequestedbytheownerofthetrademark.allotherproductnamesandservicesidentifiedthroughoutthisbookareusedineditorialfashiononlyandforthebenefitofsuchcompanieswithnointentionofinfringementofthetrademark.Nosuchuse,ortheuseofanytradename,isintendedtoconveyendorsementorotheraffiliationwiththisbookISBN-13:978-0-32196551-6ISBN-10:0-321-96551-5987654321PrintedandboundintheunitedstatesofamericaFirsteditionTomyfather,whoalwayswantedmetowriteabook,Mymother,whoalwaysmademefeellikeIcouldMelanie,whomarriedme-thegreateststrokeofgoodfortuneofmylifeandmyson,Harry,whowillsurelywritebooksmuchbetterthanthisonewheneverhewantstoSecondeditionTomybigbrother,Phil,whowasamenschhiswholelifeThirdeditionToallthepeoplefromallpartsoftheworld--whohavebeensoniceaboutthisbookforfourteenyears.Yourkindwords--inperson,inemail,andinyourblogs-havebeenoneofthegreatjoysofmylifeEspeciallythewomanwhosaiditmadeherlaughsohardthatmilkcameoutheofhernoseContentsPREFACEAboutthiseditionINTRODUCTIONReadmefirstThroatclearinganddisclaimersGUIDINGPRINCIPLESCHAPTER1Dontmakemethink!Krug'sFirstLawofusabilityCHAPTER2HowwereallyusethewebScanning,satisficing,andmuddlingthroughCHAPTER3.BillboardDesign101Designingforscanning,notreadingCHAPTER4.AnimaL,Vegetable,orMineral?WhyuserslikemindlesschoicesCHAPTER5OmitneedlesswordsTheartofnotwritingfortheWebTHINGSYOUNEEDTOGETRIGHTCHAPTER6.StreetsignsandBreadcrumbsDesigningnavigationCHAPTERZTheBigBangTheoryofWebDesignTheimportanceofgettingpeopleoffontherightfootMAKINGSUREYOUGOTTHEMRIGHTCHAPTER8Thefarmerandthecowmanshouldbefriends>Whymostargumentsaboutusabilityareawasteoftime,andhowtoavoidthemChAPTER9.USabilitytestingon10centsadayKeepingtestingsimple--soyoudoenoughofitLARGERCONCERNSANDOUTSIDEINFLUENCESCHAPTER10MObile:It'snotjustacityinAlabamaanymoreWelcometothe21stCentury.YoumayexperienceaslightsenseofvertigoCHAPTER11UsabilityascommoncourtesyWhyyourWebsiteshouldbeamenschCHAPTER12.AccessibilityandyouJustwhenyouthinkyouredone,acatfloatsbywithbutteredtoaststrappedtoitsbackCHAPTER13GuidefortheperplexedMakingusabilityhappenwhereyouliveAcknowledgmentsIndexPreface:aboutthiseditionPeoplecomeandgosoquicklyhere!DOROTHYGALEJUDYGARLAND)INTHEWIZARDOFOZ(1939)Iwrotethefirsteditionofdon'tmakemethinkbackin2000By2002,Ibegantogetafewemailsayearfromreadersasking(verypolitely)ifI'dthoughtaboutupdatingit.Notcomplaining,justtryingtobehelpful."alotoftheexamplesareoutofdate"wastheusualcommentMystandardresponsewastopointoutthatsinceiwroteitrightaroundthetimetheinternetbubbleburstmanyofthesitesiusedasexampleshadalreadydisappearedbythetimeitwaspublishedButIdidn'tthinkthatmadetheexamplesanylessclear.Finally,in2006Ihadastrongpersonalincentivetoupdateit.ButasIrereadittoseewhatIshouldchange,Ijustkeptthinking"Thisisallstilltrue>Ireallycouldn'tfindmuchofanythingthatithoughtshouldbechangedHalfoftheroyaltiesforthebookweregoingtoacompanythatnolongerexisted,anddoinganeweditionmeantanewcontractandtwicetheroyalties-formeIfitwasanewedition,though,somethinghadtobedifferent.SoIaddedthreechaptersthatididn'thavetimetofinishbackin2000,hitthesnoozebutton,andhappilypulledthecoversbackovermyheadforanothersevenyearsSteveKrugACommonSenseApproachtoWebUsabilityFOREWORDBYROGERBLACK2000SteveKrugTHINKACommonSenseApproachtoWebUsabilitySECONDEDITION2006WRitingisreallyhardforme,andI'malwayshappytohaveareasonnottodoit.GivemeagoodoldrootcanaloverwritinganydaySowhynowfinallyanewedition?Tworeasons#1。
Let’sfaceit:It'soldThere'snodoubtaboutitatthispoint:Itfeelsdated.Afterall,it'sthirteenyearsold,whichislikeahundredyearsinInternettime.(See?Nobodyevensaysthingslike"inInternettimeanymoreMostofthewebpagesiusedforexamples,likeSenatorOrrinHatch'scampaignsiteforthe2000electionlookreallyold-fashionednowSitesthesedaystendtolookalotmoresophisticated,asyoumightexpectPRENIDEN'TWWw.\TOCiTheRepublicans:ANewHampshireForumTheDec2DebateThefirstakeahddyeGoPdebyetesThursdayheatsupthepoltcalstylewarsaSenatorHatchfightstokeepsubstancenCampaign2000.EVLLSTORYTheExperiencedCandidateLw警mHatchCampaign2000BeneoiceThatMatters!ClickheretoCONTRIBUTECAMPAIGNNEWSlIVESCONTIRIHIUTORLINTsCOILINKS)LUNTEEILThieRar4每MCICK2cpM(.DisHachPre的d时Ceme,ntP0.00多』LC,UT0403nTERNETANDNTwoRxsaunaSwww.orrinhatch.com1999

SENSIRION,FLOW,APPNOTE,FITTING

在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。 每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。 另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。 为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。