cq9五福临门游戏大奖视频

分數階微積分研究的是非整數階的微分和積分，可實現的階數靈活且自由度大，所以在圖像處理領域的應用得到越來越多的關注。本書通過特定的分數階微積分定義與圖像處理領域的重要工具——傅里葉變換和分數階傅里葉變換，建立分數階微積分與圖像處理的關系。全書共7章，分別是緒論、圖像處理及分數階微積分基礎、分數階微積分與信號處理的關系、基于分數階變階微分的圖像去噪方法、圖像復原的分數階偏微分方法、圖像分割的分數階微積分方法和圖像增強的分數階微積分方法。本書論述清晰，適合計算機圖形處理領域的研究人員、對分數階微積分應用感興趣的讀者閱讀，也適合作為高等院校相關專業學生的參考書。

·5.8萬字

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簡明實用速算法：高位分段累加算術（第2版）

本書以高位分段累加計算的方法，全面系統地介紹了實數加、減、乘、除、乘方、開方運算在普遍情況下的簡化計算法則，實現了數的運算在通常情況下即能順利通過心算速算來完成的目的。全書共分九章：第一章至第八章介紹了高位分段累加算術的思想方法，及其在實數加、減、乘、除、乘方、開方運算中的一般心算速算應用；第九章介紹了特殊條件下的心算速算方法，并運用高位分段累加算術解讀了古印度吠陀數學乘法五式和除數是九的除法速算方法。第二版增加了直寫答案式簡化計算方法，更有利于大眾應用。介紹方式由淺入深、通俗易懂。并詳細講解了方法的論證過程，有益于讀者理解和掌握應用，利于普及。掌握了本算法不僅能迅速提高學生的心算能力和計算速度，更有利于提高學生的邏輯思維能力、激發學生的學習興趣。本方法若能廣泛應用于中小學教學中，即能明顯提高學生的解題速度和學習效果；若能廣泛應用于財會、商業、科研活動中，更能提高人們的工作效率和社會效益。本書可作為中小學校、財會、商貿及師范院校的教輔參考用書，也適用于青少年及從事財會、商業、科研等活動的成人自學。為了方便我國小學各年級讀者學習，在2018年美國版《高位分段累加算術》（HIGHORDERPIECEWISEARITHMETICS）的基礎上增設了減法運算中的退位速算法和“附錄三：速算基礎習題（小學一至六年級分階段基礎練習題）”供小學讀者速算訓練用。

·1.6萬字

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Blockchain for Enterprise

Theincreasinggrowthinblockchainuseisenormous,anditischangingthewaybusinessisdone.Manyleadingorganizationsarealreadyexploringthepotentialofblockchain.Withthisbook,youwilllearntobuildend-to-endenterprise-leveldecentralizedapplicationsandscalethemacrossyourorganizationtomeetyourcompany'sneeds.ThisbookwillhelpyouunderstandwhatDAppsareandhowtheblockchainecosystemworks,viareal-worldexamples.Thisextensiveend-to-endbookcoverseveryblockchainaspectforbusinessandfordevelopers.Youwillmasterprocessflowsandincorporatethemintoyourownenterprise.YouwilllearnhowtouseJ.P.Morgan’sQuorumtobuildblockchain-basedapplications.Youwillalsolearnhowtowriteapplicationsthatcanhelpcommunicateenterpriseblockchainsolutions.Youwilllearnhowtowritesmartcontractsthatrunwithoutcensorshipandthird-partyinterference.Onceyou'vegraspedwhatablockchainisandhavelearnedaboutQuorum,youwilljumpintobuildingreal-worldpracticalblockchainapplicationsforsectorssuchaspaymentandmoneytransfer,healthcare,cloudcomputing,supplychainmanagement,andmuchmore.

·4.9萬字

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Hyperledger Cookbook

Hyperledgerisanopen-sourceprojectandcreatesprivateblockchainapplicationsforarangeofdomains.Thisbookwillbeyourdeskreferenceasyouexplorecommonandnot-so-commonchallengesfacedwhilebuildingblockchainnetworksusingHyperledgerservices.We'llworkthroughallHyperledgerplatformmodulestounderstandtheirservicesandfeaturesandbuildend-to-endblockchainapplicationsusingvariousframeworksandtoolssupportedbyHyperledger.Thisbook'sindependent,recipe-basedapproach(packedwithreal-worldexamples)willfamiliarizeyouwiththeblockchaindevelopmentcycle.Frommodelingabusinessnetworktointegratingwithvarioustools,youwillcoveritall.We'llcovercommonandnot-so-commonchallengesfacedintheblockchainlifecycle.Later,we'lldelveintohowwecaninteractwiththeHyperledgerFabricblockchain,coveringalltheprinciplesyouneedtomaster,suchaschaincode,smartcontracts,andmuchmore.We'llalsoaddressthescalabilityandsecurityissuescurrentlyfacedinblockchaindevelopment.Bytheendofthisbook,youwillbeabletoimplementeachrecipetoplan,design,andcreateafull-fledged,private,decentralizedapplicationtomeetorganizationalneeds.

·4.9萬字

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Hands-On Blockchain with Hyperledger

BBlockchainandHyperledgertechnologiesarehottopicstoday.HyperledgerFabricandHyperledgerComposerareopensourceprojectsthathelporganizationscreateprivate,permissionedblockchainnetworks.Thesefindapplicationinfinance,banking,supplychain,andIoTamongseveralothersectors.ThisbookwillbeaneasyreferencetoexploreandbuildblockchainnetworksusingHyperledgertechnologies.Thebookstartsbyoutliningtheevolutionofblockchain,includinganoverviewofrelevantblockchaintechnologies.YouwilllearnhowtoconfigureHyperledgerFabricandbecomefamiliarwithitsarchitecturalcomponents.Usingthesecomponents,youwilllearntobuildprivateblockchainnetworks,alongwiththeapplicationsthatconnecttothem.Startingfromprinciplesfirst,you’lllearntodesignandlaunchanetwork,implementsmartcontractsinchaincodeandmuchmore.Bytheendofthisbook,youwillbeabletobuildanddeployyourowndecentralizedapplications,handlingthekeypainpointsencounteredintheblockchainlifecycle.

·10.8萬字

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Ethereum Smart Contract Development

IfyouwanttoknowtheinsandoutsoftheEthereumnetworkandbuildyourowndecentralizedapplications,thenthisbookiswhatyouneed!ThisbookisforanyonewhoisinterestedinblockchainandwantstobecomeanEthereumdeveloper.It’sidealforexistingEthereumdeveloperswhowanttodevelopEthereumusingsmartcontracts.Basicknowledgeofcryptographyisexpectedbutisnotmandatory.

·5.3萬字

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Hands-On Cryptography with Python

Hands-OnCryptographywithPythonisforsecurityprofessionalswhowanttolearntoencryptandevaluatedata,andcomparedifferentencryptionmethods.

·1.6萬字

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Hands-On Blockchain for Python Developers

Blockchainisseenasthemaintechnologicalsolutionthatworksasapublicledgerforallcryptocurrencytransactions.Thisbookservesasapracticalguidetodevelopingafull-fledgeddecentralizedapplicationwithPythontointeractwiththevariousbuildingblocksofblockchainapplications.Hands-OnBlockchainforPythonDevelopersstartsbydemonstratinghowblockchaintechnologyandcryptocurrencyhashingworks.Youwillunderstandthefundamentalsandbenefitsofsmartcontractssuchascensorshipresistanceandtransactionaccuracy.Asyousteadilyprogress,you'llgoontobuildsmartcontractsusingVyper,whichhasasimilarsyntaxtoPython.Thisexperiencewillfurtherhelpyouunraveltheotherbenefitsofsmartcontracts,includingreliablestorageandbackup,andefficiency.You'llalsouseweb3.pytointeractwithsmartcontractsandleveragethepowerofboththeweb3.pyandPopulusframeworktobuilddecentralizedapplicationsthatoffersecurityandseamlessintegrationwithcryptocurrencies.Asyouexplorelaterchapters,you'lllearnhowtocreateyourowntokenontopofEthereumandbuildacryptocurrencywalletgraphicaluserinterface(GUI)thatcanhandleEthereumandEthereumRequestforComments(ERC-20)tokensusingthePySide2library.Thiswillenableuserstoseamlesslystore,send,andreceivedigitalmoney.Towardtheend,you'llimplementInterPlanetaryFileSystem(IPFS)technologyinyourdecentralizedapplicationtoprovideapeer-to-peerfilesystemthatcanstoreandexposemedia.Bytheendofthisbook,you'llbewell-versedinblockchainprogrammingandbeabletobuildend-to-enddecentralizedapplicationsonarangeofdomainsusingPython.

·8.8萬字

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Foundations of Blockchain

Blockchaintechnologyisacombinationofthreepopularconcepts:cryptography,peer-to-peernetworking,andgametheory.Thisbookisforanyonewhowantstodiveintoblockchainfromfirstprinciplesandlearnhowdecentralizedapplicationsandcryptocurrenciesreallywork.Thisbookbeginswithanoverviewofblockchaintechnology,includingkeydefinitions,itspurposesandcharacteristics,soyoucanassessthefullpotentialofblockchain.Allessentialaspectsofcryptographyarethenpresented,asthebackboneofblockchain.Forreaderswhowanttostudytheunderlyingalgorithmsofblockchain,you’llseePythonimplementationsthroughout.You’llthenlearnhowblockchainarchitecturecancreatedecentralizedapplications.You’llseehowblockchainachievesdecentralizationthroughpeer-to-peernetworking,andhowasimpleblockchaincanbebuiltinaP2Pnetwork.You’lllearnhowtheseelementscanimplementacryptocurrencysuchasBitcoin,andthewiderapplicationsofblockchainworkthroughsmartcontracts.Blockchainoptimizationtechniques,andblockchainsecuritystrategiesarethenpresented.Tocompletethisfoundation,weconsiderblockchainapplicationsinthefinancialandnon-financialsectors,andalsoanalyzethefutureofblockchain.Astudyofblockchainusecasesincludessupplychains,paymentsystems,crowdfunding,andDAOs,whichroundsoutyourfoundationinblockchaintechnology.

·9.2萬字

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Blockchain for Business 2019

BlockchainforBusiness2019isacomprehensiveguidethatenablesyoutobringinvariousblockchainfunctionalitiestoextendyourexistingbusinessmodelsandmakecorrectfully-informeddecisions.Youwilllearnhowdecentralizedapplicationsaretransformingnumerousbusinesssectorsthatareexpectedtoplayahugeroleinthefuture.Youwillseehowlargecorporationsarealreadyimplementingblockchaintechnologynow.Youwillthenlearnaboutthevariousblockchainservices,suchasBitcoin,Ethereum,Hyperledger,andotherstounderstandtheirusecasesinavarietyofbusinessdomains.Youwilldevelopasolidfundamentalunderstandingofblockchainarchitecture.Movingahead,youwillgettogripswiththeinnerworkingsofblockchain,withdetailedexplanationsofmining,decentralizedconsensus,cryptography,smartcontracts,andmanyotherimportantconcepts.Youwilldelveintoarealisticviewofthecurrentstateofblockchaintechnology,alongwithitsissues,limitations,andpotentialsolutionsthatcantakeittothenextlevel.Bytheendofthisbook,youwillallbewellversedinthelatestinnovationsanddevelopmentsintheemergingblockchainspace.

·6萬字

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Blockchain Developer's Guide

Blockchainapplicationsprovideasingle-sharedledgertoeliminatetrustissuesinvolvingmultiplestakeholders.ItisthemaintechnicalinnovationofBitcoin,whereitservesasthepublicledgerforBitcointransactions.BlockchainDeveloper'sGuidetakesyouthroughtheelectrifyingworldofblockchaintechnology.Itbeginswiththebasicdesignofablockchainandelaboratesconcepts,suchasInitialCoinOfferings(ICOs),tokens,smartcontracts,andotherrelatedterminologies.YouwillthenexplorethecomponentsofEthereum,suchasEthertokens,transactions,andsmartcontractsthatyouneedtobuildsimpleDApps.BlockchainDeveloper'sGuidealsoexplainswhyyoumustspecificallyuseSolidityforEthereum-basedprojectsandletsyouexploredifferentblockchainswitheasy-to-followexamples.Youwilllearnawiderangeofconcepts-beginningwithcryptographyincryptocurrenciesandincludingethersecurity,mining,andsmartcontracts.YouwilllearnhowtousewebsocketsandvariousAPIservicesforEthereum.BytheendofthisLearningPath,youwillbeabletobuildefficientdecentralizedapplications.ThisLearningPathincludescontentfromthefollowingPacktproducts:BlockchainQuickReferencebyBrennHill,SamanyuChopra,PaulValencourt.BuildingBlockchainProjectsbyNarayanPrusty.

·12.5萬字

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Security Tokens and Stablecoins Quick Start Guide

Thefailureofinitialcoinofferings(ICOs)isnoaccident,asmostICOsdonotlinktoarealassetandarenotregulated.RealizingtheshortcomingsofICOs,theblockchaincommunityandpotentialinvestorsembracedsecuritytokenofferings(STOs)andstablecoinsenthusiastically.Inthisbook,westartwithanoverviewoftheblockchaintechnologyalongwithitsbasicconcepts.WeintroducetheconceptbehindSTO,andcoverthebasicrequirementsforlaunchingaSTOandtherelevantregulationsgoverningitsissuance.WediscussU.S.securitieslawsdevelopmentinlaunchingsecuritydigitaltokensusingblockchaintechnologyandshowsomerealusecases.WealsoexploretheprocessofSTOlaunchesandlegalconsiderations.WeintroducepopularsecuritytokensinthecurrentblockchainspaceandtalkabouthowtodevelopasecuritytokenDApp,includingsmartcontractdevelopmentforERC1404tokens.Later,you'lllearntobuildfrontendsidefunctionalitiestointeractwithsmartcontracts.Finally,wediscussstablecointechnicaldesignfunctionalitiesforissuingandoperatingSTOtokensbyinteractingwithEthereumsmartcontracts.Bytheendofthisbook,youwillhavelearnedmoreaboutSTOsandgainedadetailedknowledgeofbuildingrelevantapplications—allwiththehelpofpracticalexamples.

·5.6萬字

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錢敏數學文選

本書收錄了《馬爾可夫半群的不變測度與遍歷性》《非自治系統的不變圈（解流形）分支》《MinimalCoupledDiffusionProcess》《GeneralizedWeylTransformation》等文章。

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圖像處理的分數階微積分方法