pg冰火双娇百搭奖金翻倍了吗

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

·5.3萬字

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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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大鬧星空：西游星座圖

現代的國際通用星座體系起源于兩河流域，數千年來，星座的演變體現了科學的發展與文化的融合。當今常見的星座形象主要為西方神話的眾神，而在本書中，作者別出心裁地將現代星座與我國古典名著《西游記》相融合，為88星座賦予了全新的形象，繪制了一幅“西游星空”。在這片星空中輝映的，不再是奧林匹斯眾神與英雄，而是西游世界中令人難忘的一眾神仙與妖魔。本產品為《大鬧星空：讀西游識星座》配套星圖版，匯集了作者精心繪制的西游星座圖像和故事，包含兩幅大尺寸西游星圖與星座手冊。

·9221字

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中國古樹名木：濟南卷

《中國古樹名木——濟南卷》將濟南地區的古樹名木集錄成冊，書中古樹依據全國綠化委員會、國家林業局文件的規定劃分，特指樹齡在100年以上的樹木，名木特指在歷史上或社會上有重大影響的中外歷代名人、領袖人物所植或者具有極其重要的歷史、文化價值、紀念意義的樹木。本書采用圖文并茂的形式，記述記載濟南市古樹名木的分布、樹木狀況及傳說等。

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趣識實驗動物

本書介紹了動物實驗及實驗動物的相關科學知識，涵蓋了實驗動物及動物實驗的起源、概念、發展史、意義等，同時結合著名案例對動物實驗及實驗動物進行了剖析。書中不僅介紹了常見實驗動物，還介紹了實驗動物在醫藥、生物技術、生命健康等領域的廣泛應用，以及學生不熟悉的動物福利問題等，并針對實驗動物保護問題給出了未來的解決方法。

·1.9萬字

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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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天學外史（江曉原作品系列）

作者在大量研究成果的基礎上，將中國古代天學置于中國傳統社會文化和世界天文學發展兩大背景之下展開論述，又以大量史實論證了《周髀算經》與印度、希臘天文學的關系，印度、巴比倫天文學在中國和日本的傳播，中國與伊斯蘭天文學的交流，近代西方天文學傳入中國及其造成的影響與思想沖突。作者還就天文學史的方法論問題進行了分析，討論古代中國的宇宙理論，并借助三個引人入勝的個案論述了應如何看待古代中國的天學遺產。

·15.3萬字

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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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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 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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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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雄安草木行

以游記形式歷時1年時間，13次考察，1萬多張照片對雄安進行植物本底調查。記錄了雄安的美，雄安的靜，雄安的熱情，雄安的飽滿本書從三個部分詮釋雄安草木：行走，呈現10次的調查中的所見所聞、所感所想；從喬灌木的角度選擇了10種雄安建設中可以大量栽種的本土植物；從不同類型的植物出發，講述保護植物、鄉土植物、水生植物等10個主題植物故事，包括寫給志愿者、寫給*小調查員以及家庭博物旅行的建議等。本書與其說是植物故事，不如定義為草木情懷。由草木而衍生的思考，生活方式的轉變。

·6.2萬字

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退耕還林工程建設對縣域的影響

退耕還林工程是我國改善生態環境，促進可持續發展的重要工程，本書以吳起縣為例，試圖通過對該縣退耕還林工程建設效果進行科學、全面、系統的監測與評價研究，探索分析退耕還林工程實施后的生態系統的演變規律、客觀科學監測評價退耕還林的生態功能和效益價值，不僅有利于完善退耕還林工程的實施和管理體系，及其宏觀掌握全國退耕還林工程實施的效益，也有利于提高全國退耕還林工程建設的宏觀決策水平等，并為退耕還林工程的成果鞏固提供科學依據，特別是對黃土高原地區的生態修復有著極為重要的現實指導意義。

·14.6萬字

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應對氣候變化研究：廣西策略與路徑

氣候變化直接影響人類的生存環境和發展條件，影響經濟社會發展全局和人民群眾切身利益，積極應對氣候變化、控制溫室氣體排放已成為全球共識和大勢所趨。本書基于現狀梳理、綜合評估、模型構建、實證分析、案例總結，科學提出廣西應對氣候變化的總體思路、重點領域，并提出低碳工業園區、低碳旅游、低碳城鎮、低碳社區、低碳農業、低碳建筑、低碳景區、低碳企業、低碳校園九個方面的低碳試點創建思路。