"Thisimportantvolumeisthefirstpartofatwo-parttextbook(thesecondpartisentitledConservationlawsandellipticequations).Thetextincludesinterestinghomeworkproblemsthatimplementdifferentaspectsofmostoftheschemesdiscussed.Theimplementationaspectofthistextincludesalargeamountofcomputing.Otherusefulaspectsofcomputingincludedinthisvolumearesymboliccomputingandtheuseofgraphicsforanalysis.Prerequisitessuggestedforusingthisbookmightincludeonesemesterofpartialdifferentialequationsandsomeprogrammingcapability.Thisbookwillbeagoodreferencetextforstudents."--MATHEMATICALREVIEWS

Abriefoverviewoftextclassificationalgorithmsisdiscussed.Thisoverviewcoversdifferenttextfeatureextractions,dimensionalityreductionmethods,existingalgorithmsandtechniques,andevaluationsmethods.

wordpress的Discuz插件

Discuz!论坛小图标，用于版块用。
也可以用做网站设计时的小图标等。
值得下载！

InATourofC++,SecondEdition,BjarneStroustrup,thecreatorofC++,describeswhatconstitutesmodernC++.Thisconcise,self-containedguidecoversmostmajorlanguagefeaturesandthemajorstandard-librarycomponents—not,ofcourse,ingreatdepth,buttoalevelthatgivesprogrammersameaningfuloverviewofthelanguage,somekeyexamples,andpracticalhelpingettingstarted.StroustruppresentstheC++featuresinthecontextoftheprogrammingstylestheysupport,suchasobject-orientedandgenericprogramming.Histourisremarkablycomprehensive.Coveragebeginswiththebasics,thenrangeswidelythroughmoreadvancedtopics,includingmanythatarenewinC++17,suchasmovesemantics,uniforminitialization,lambdaexpressions,improvedcontainers,randomnumbers,andconcurrency.ThetourevencoverssomeextensionsbeingmadeforC++20,suchasconceptsandmodules,andendswithadiscussionofthedesignandevolutionofC++.Thisguidedoesnotaimtoteachyouhowtoprogram(forthat,seeStroustrup’sProgramming:PrinciplesandPracticeUsingC++,SecondEdition),norwillitbetheonlyresourceyou’llneedforC++mastery(forthat,seeStroustrup’sTheC++ProgrammingLanguage,FourthEdition,andrecommendedonlinesources).If,however,youareaCorC++programmerwantinggreaterfamiliaritywiththecurrentC++language,oraprogrammerversedinanotherlanguagewishingtogainanaccuratepictureofthenatureandbenefitsofmodernC++,youcan’tfindashorterorsimplerintroductionthanthistourprovides.

从mysql官网上下载mysql-server_5.7.21-1ubuntu14.04_amd64.deb-bundle.tar，然后进行离线安装，解压该安装包，会出现11个依赖包，按照顺序依次使用sudodpkg-i进行安装，中间会报错，显示缺少相应的依赖，具体如下：*******@ubuntu:/opt/mysql$sudodpkg-imysql-community-client_5.7.21-1ubuntu14.04_amd64.debSelectingpreviouslyunselectedpackagemysql-community-client.(Readingdatabase...208518filesanddirectoriescurrentlyinstalled.)Preparingtounpackmysql-community-client_5.7.21-1ubuntu14.04_amd64.deb...Unpackingmysql-community-client(5.7.21-1ubuntu14.04)...dpkg:dependencyproblemspreventconfigurationofmysql-community-client:mysql-community-clientdependsonlibaio1(＞=0.3.93);however:Packagelibaio1isnotinstalled.dpkg:errorprocessingpackagemysql-community-client(--install):dependencyproblems-leavingunconfiguredProcessingtriggersforman-db(2.6.7.1-1ubuntu1)...Errorswereencounteredwhileprocessing:mysql-community-client和********@ubuntu:/opt/mysql$sudodpkg-imysql-community-server_5.7.21-1ubuntu14.04_amd64.debSelectingpreviouslyunselectedpackagemysql-community-server.(Readingdatabase...208598filesanddirectoriescurrentlyinstalled.)Preparingtounpackmysql-community-server_5.7.21-1ubuntu14.04_amd64.deb...Unpackingmysql-community-server(5.7.21-1ubuntu14.04)...dpkg:dependencyproblemspreventconfigurationofmysql-community-server:mysql-community-serverdependsonlibmecab2(＞=0.996-1.1);however:Packagelibmecab2isnotinstalled.dpkg:errorprocessingpackagemysql-community-server(--install):dependencyproblems-leavingunconfiguredProcessingtriggersforman-db(2.6.7.1-1ubuntu1)...Processingtriggersforureadahead(0.100.0-16)...ureadaheadwillbereprofiledonnextrebootErrorswereencounteredwhileprocessing:mysql-community-server附上依赖包安装顺序：1.mysql-common_5.7.21-1ubuntu14.04_amd64.deb2.libmysqlclient20_5.7.21-1ubuntu14.04_amd64.deb3.libmysqlclient-dev_5.7.21-1ubuntu14.04_amd64.deb4.libmysqld-dev_5.7.21-1ubuntu14.04_amd64.deb

ComputerConstructionPrinciplesandPracticesThisexcitingnewbookcombinesadetailedstudyofmoderntheoriesofcompilerdesignwithacompletedescription(withsourcecode)ofaworkingcompilerforasmalllanguage.Thebookreflectstheauthor'sconvictionthatpracticalaspectsofcompilerdesigncannotbeunderstoodwithoutagraspoftheory,andthattheorycannotbetrulycomprehendedbyundergraduatestudentswithoutseeingitputintoactualpractice.Unifyingthetext'sdiscussionofconceptsisacompleteworkingcompilerwritteninCanddevelopedusingthetechniquesdiscussedineachchapter.Extensiveexercisesetsattheendofeachchapterfocusstudent'sattentiononspecificprogrammingproblems

Thispracticalguideprovidesnearly200self-containedrecipestohelpyousolvemachinelearningchallengesyoumayencounterinyourdailywork.Ifyou’recomfortablewithPythonanditslibraries,includingpandasandscikit-learn,you’llbeabletoaddressspecificproblemssuchasloadingdata,handlingtextornumericaldata,modelselection,anddimensionalityreductionandmanyothertopics.Eachrecipeincludescodethatyoucancopyandpasteintoatoydatasettoensurethatitactuallyworks.Fromthere,youcaninsert,combine,oradaptthecodetohelpconstructyourapplication.Recipesalsoincludeadiscussionthatexplainsthesolutionandprovidesmeaningfulcontext.Thiscookbooktakesyoubeyondtheoryandconceptsbyprovidingthenutsandboltsyouneedtoconstructworkingmachinelearningapplications.You’llfindrecipesfor:Vectors,matrices,andarraysHandlingnumericalandcategoricaldata,text,images,anddatesandtimesDimensionalityreductionusingfeatureextractionorfeatureselectionModelevaluationandselectionLinearandlogicalregression,treesandforests,andk-nearestneighborsSupportvectormachines(SVM),naïveBayes,clustering,andneuralnetworksSavingandloadingtrainedmodels

dcmtk3.6storescp、storescu

Scully,MarlanO.Zubairy,MuhammadSuhail=QuantumOptics.

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。