捕鱼机怎么加分

本書(shū)從上述認(rèn)知和觀點(diǎn)出發(fā)，以設(shè)問(wèn)的形式，介紹了天氣、氣候和氣候變化的概念，將其與地球演化史和人類(lèi)發(fā)展史結(jié)合，又例舉了歷史上氣候變化的極端事件，讓讀者從多角度、多方面了解未來(lái)氣候變化可能給社會(huì)經(jīng)濟(jì)帶來(lái)的負(fù)面影響，喚醒人類(lèi)善待自然，保護(hù)環(huán)境，準(zhǔn)確把握科技進(jìn)步對(duì)自然界的影響及與人類(lèi)可持續(xù)發(fā)展關(guān)系的脈搏，揭開(kāi)了氣候變化科學(xué)的神秘面紗，強(qiáng)調(diào)了應(yīng)對(duì)氣候變化人人有責(zé)的大眾觀，瞄準(zhǔn)可持續(xù)發(fā)展這一全球關(guān)注的問(wèn)題，將科學(xué)與社會(huì)發(fā)展結(jié)合起來(lái)，使“高雅”的氣候變化科學(xué)更易讀者理解，值得稱(chēng)道。

·12.4萬(wàn)字

理論最小值

《理論最小值：經(jīng)典力學(xué)》是理論物理學(xué)家、弦論創(chuàng)始人萊昂納德·薩斯坎德聯(lián)合物理愛(ài)好者喬治·拉保夫斯基的全新作品。全書(shū)的結(jié)構(gòu)簡(jiǎn)潔，語(yǔ)言?xún)?yōu)雅，是一本經(jīng)典物理學(xué)的入門(mén)書(shū)。在國(guó)外一經(jīng)上市，就得到了廣大師生的追捧。薩斯坎德和喬治·拉保夫斯基善于運(yùn)用清晰的邏輯一步步讓讀者對(duì)他們所講述的內(nèi)容進(jìn)行理解，他們通過(guò)11講，講述了經(jīng)典物理學(xué)的本質(zhì)，揭示了運(yùn)動(dòng)、動(dòng)力學(xué)、能量、最小作用量、對(duì)稱(chēng)性和守恒定律以及角動(dòng)量、電力與磁力等關(guān)鍵原理與概念。旨在引領(lǐng)讀者去欣賞理論物理之美，深入淺出，層層推進(jìn)，引人入勝。《理論最小值：經(jīng)典力學(xué)》屬于湛廬文化重磅推出的“科學(xué)大師”系列圖書(shū)之一。此系列還包括《理論最小值：量子力學(xué)》《理論最小值：相對(duì)論與經(jīng)典場(chǎng)論》，這些書(shū)即將由湛廬文化2021年策劃推出。

·7.2萬(wàn)字

寂靜的微世界

從早期的智人開(kāi)始，我們的祖先就一直受到細(xì)菌的侵襲。這一點(diǎn)我們從化石中就可以找到一些證據(jù)。但是幾乎可以肯定的是，遠(yuǎn)古人類(lèi)所遭受的疾病困擾要比今天少得多。早期的人口密度不大，人們居無(wú)定所。生活雖然艱苦，但也避免了大量生活垃圾和糞便的堆積，也基本不太可能暴發(fā)大規(guī)模的疾病。進(jìn)入現(xiàn)代社會(huì)，伴隨著貿(mào)易的全球化、人口流動(dòng)的全球化以及人口規(guī)模的擴(kuò)大，人們開(kāi)始涉足地球上的每一個(gè)角落。現(xiàn)在已經(jīng)很難找到真正的“世外桃源”。隨之而來(lái)的是更多隱藏在自然界中的病原體與人類(lèi)相遇，它們有些原本只寄存于動(dòng)物之中，有些是我們的祖先在演化過(guò)程曾經(jīng)擺脫過(guò)的，而如今，它們重出江湖，一系列的新現(xiàn)疾病也不斷出現(xiàn)。它們的暴發(fā)往往可以波及整個(gè)人類(lèi)世界，其中的一些已經(jīng)給我們帶來(lái)了大麻煩，而另一些，我們還不清楚它們到底意味著什么。

·11.9萬(wàn)字

會(huì)員

寫(xiě)給青少年的數(shù)學(xué)故事（下）：幾何妙想

幾何是數(shù)學(xué)學(xué)習(xí)的基礎(chǔ)之一，借助幾何學(xué)，我們能搭建房屋、丈量土地、觀測(cè)星空，還能設(shè)計(jì)滑梯、裝飾地板……連一副小小的七巧板都能催生出眾多數(shù)學(xué)成果。本書(shū)從建筑、測(cè)量、圖形游戲等角度講述了有趣的幾何小故事，不僅涉及直線形、圓、非圓曲線、立體幾何等基礎(chǔ)幾何學(xué)知識(shí)，而且加入了圖論、拓?fù)洹⒔M合幾何、非歐幾何等主題，“擴(kuò)大”了美妙的幾何世界。本書(shū)闡釋了幾何學(xué)知識(shí)，同時(shí)介紹了古今中外關(guān)于幾何的逸聞趣事，展現(xiàn)了圖與形的自然之美。本書(shū)尤其適合小學(xué)高年級(jí)學(xué)生和中學(xué)生閱讀。

·10.3萬(wàn)字

會(huì)員

天工開(kāi)物全鑒

《天工開(kāi)物》先后被譯成日、英、法、德等國(guó)文本，是世界上一部關(guān)于農(nóng)業(yè)和手工業(yè)生產(chǎn)的綜合性著作。書(shū)中真實(shí)記錄了中國(guó)古代了不起的農(nóng)業(yè)和手工業(yè)智慧，強(qiáng)調(diào)人類(lèi)要和自然相協(xié)調(diào)、人力要與自然力相配合。被后世稱(chēng)為“百科全書(shū)之祖”。

·17.6萬(wàn)字

會(huì)員

電子元器件與電路一月通（第3版）

本書(shū)是作者根據(jù)初學(xué)者的心理特點(diǎn)及學(xué)習(xí)要求而編寫(xiě)的，全書(shū)先后講述了電子元器件的基本知識(shí)、模擬電子技術(shù)、脈沖與數(shù)字技術(shù)等內(nèi)容。全書(shū)從實(shí)用角度出發(fā)，采用圖話(huà)式講解方法，通過(guò)師徒對(duì)話(huà)，逐步引出知識(shí)精髓，輕松做到讓初學(xué)者在一個(gè)月內(nèi)掌握電子元器件及電子技術(shù)的主體內(nèi)容。該書(shū)適應(yīng)高職院校、中職學(xué)校電子專(zhuān)業(yè)學(xué)生使用，也適應(yīng)電子專(zhuān)業(yè)短期培訓(xùn)班學(xué)員使用。當(dāng)作為教材時(shí)，根據(jù)學(xué)員基礎(chǔ)的不同，可按90～120課時(shí)教學(xué)。這是一本專(zhuān)門(mén)講述電子元件和電子技術(shù)的專(zhuān)業(yè)圖書(shū)，全書(shū)一反常態(tài)，按日安排學(xué)習(xí)內(nèi)容，力求在一個(gè)月內(nèi)讓讀者輕松掌握電子技術(shù)的基本知識(shí)。全書(shū)共由三部分內(nèi)容構(gòu)成，第1～9日主要講述電子元器件，內(nèi)容涵蓋電阻器、電容器、電感器、變壓器、壓電元件、二極管、三極管、場(chǎng)效應(yīng)管、晶閘管、光電耦合器、集成電路、電磁繼電器等元器件的識(shí)別、應(yīng)用及檢測(cè)；第10～23日主要講述模擬電子技術(shù)，內(nèi)容涵蓋各種放大器的結(jié)構(gòu)及工作過(guò)程、各類(lèi)正弦波振蕩器的結(jié)構(gòu)及工作過(guò)程、串聯(lián)穩(wěn)壓源的結(jié)構(gòu)及工作過(guò)程、無(wú)線電波等內(nèi)容；第24～30日主要講述脈沖與數(shù)字技術(shù)，內(nèi)容涵蓋各種脈沖電路、門(mén)電路、邏輯代數(shù)、組合邏輯電路、時(shí)序邏輯電路等。

·9001字

會(huì)員

武俠數(shù)學(xué)

石器時(shí)代的原始人怎樣數(shù)數(shù)？零和阿拉伯?dāng)?shù)字是怎樣產(chǎn)生并傳入中國(guó)的？古人怎樣理解小數(shù)和負(fù)數(shù)？祖沖之用什么工具推算圓周率？數(shù)學(xué)的推算有什么實(shí)際功能，能帶來(lái)什么樣的樂(lè)趣？古代中國(guó)的數(shù)學(xué)在當(dāng)時(shí)世界上有何獨(dú)特之處，與現(xiàn)代數(shù)學(xué)課堂有哪些不同？這些問(wèn)題，都可以由郭靖、黃蓉、楊過(guò)、小龍女等武俠人物來(lái)作答。鑒于計(jì)算機(jī)編程方興未艾，許多省份的高考數(shù)學(xué)和中考數(shù)學(xué)試卷都將編程納入考點(diǎn)，本書(shū)里也有一些用計(jì)算機(jī)編程解決傳統(tǒng)數(shù)學(xué)問(wèn)題的示例，讓沒(méi)有接觸過(guò)編程的讀者初步了解程序思維的妙用。

·8.8萬(wàn)字

會(huì)員

北京山區(qū)河流生態(tài)修復(fù)技術(shù)指南

本指南收集整理了北京山區(qū)河（溝）道生態(tài)修復(fù)實(shí)施的主要成果，以文字說(shuō)明、設(shè)計(jì)圖、效果照片等形式對(duì)各項(xiàng)生態(tài)工程技術(shù)加以歸納總結(jié)，主要包括生態(tài)河流、河（溝）道生態(tài)調(diào)查、監(jiān)測(cè)與評(píng)價(jià)、河（溝）道生態(tài)修復(fù)目標(biāo)與技術(shù)、河（溝）道生態(tài)修復(fù)措施配置、河（溝）道生態(tài)恢復(fù)措施示范、生態(tài)效益評(píng)估等內(nèi)容，對(duì)山區(qū)河（溝）道生態(tài)修復(fù)具有較強(qiáng)的實(shí)踐指導(dǎo)意義。

·2萬(wàn)字

會(huì)員

飲用水水源環(huán)境風(fēng)險(xiǎn)評(píng)估與管理

本書(shū)從理論層面分析了飲用水水源面臨的各類(lèi)風(fēng)險(xiǎn)、歸納了相應(yīng)的評(píng)估模型，提出了基于產(chǎn)業(yè)布局優(yōu)化、環(huán)境監(jiān)控改善等的風(fēng)險(xiǎn)控制策略和分級(jí)分類(lèi)管理方法，并結(jié)合自身實(shí)踐，以典型飲用水水源為案例，介紹了污染物風(fēng)險(xiǎn)（環(huán)境健康風(fēng)險(xiǎn)、生態(tài)風(fēng)險(xiǎn)）和污染源風(fēng)險(xiǎn)評(píng)價(jià)和管理的具體應(yīng)用。全書(shū)理論結(jié)合實(shí)際，突出技術(shù)性和應(yīng)用性，反映了我國(guó)現(xiàn)階段飲用水源環(huán)境保護(hù)的工作重點(diǎn)。本書(shū)適用于水環(huán)境管理人員及高等院校和科研院所從事環(huán)境水利學(xué)、環(huán)境科學(xué)、環(huán)境生態(tài)學(xué)、水文學(xué)及水資源、城市科學(xué)等科研工作人員的閱讀，也可以作為高等院校研究生和本科生的專(zhuān)業(yè)輔助教材。

·11.4萬(wàn)字

會(huì)員

不焦慮的數(shù)學(xué)：孩子怎么學(xué)，家長(zhǎng)怎么教

本書(shū)講述了小學(xué)和初中階段數(shù)學(xué)學(xué)習(xí)法、學(xué)習(xí)習(xí)慣和解題思路，針對(duì)計(jì)算能力提升、知識(shí)難點(diǎn)講解、數(shù)學(xué)思想應(yīng)用和培養(yǎng)，為小學(xué)和初中階段家長(zhǎng)提升家庭輔助教育水平，以及初中學(xué)生實(shí)現(xiàn)自學(xué)與自練，提供了切實(shí)可行、容易上手的方法和思路，解決數(shù)學(xué)學(xué)習(xí)和教育中的種種困難，讓大家不再盲從和焦慮。本書(shū)適合小學(xué)和初中階段的家長(zhǎng)和數(shù)學(xué)教師閱讀，亦可作為學(xué)生本人提升數(shù)學(xué)水平的指導(dǎo)。

·18.1萬(wàn)字

會(huì)員

Digital Forensics with Kali Linux

Thisbookistargetedatforensicsanddigitalinvestigators,securityanalysts,oranystakeholderinterestedinlearningdigitalforensicsusingKaliLinux.BasicknowledgeofKaliLinuxwillbeanadvantage.

·3.6萬(wàn)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(wàn)字

會(huì)員

Blockchain Quick Reference

BlockchainQuickReferencetakesyouthroughtheelectrifyingworldofblockchaintechnologyandisdesignedforthosewhowanttopolishtheirexistingknowledgeregardingthevariouspillarsoftheblockchainecosystem.Thisbookisyourgo-toguide,teachingyouhowtoapplyprinciplesandideasformakingyourlifeandbusinessbetter.Youwillcoverthearchitecture,InitialCoinOfferings(ICOs),tokens,smartcontracts,andterminologiesoftheblockchaintechnology,beforestudyinghowtheywork.Allyouneedisacuriousmindtogetstartedwithblockchaintechnology.Onceyouhavegraspedthebasics,youwillexplorecomponentsofEthereum,suchasethertokens,transactions,andsmartcontracts,inordertobuildsimpleDapps.YouwillthenmoveontolearningwhySolidityisusedspecificallyforEthereum-basedprojects,followedbyexploringdifferenttypesofblockchainwitheasy-to-followexamples.Allthiswillhelpyoutacklechallengesandproblems.Bytheendofthisbook,youwillnotonlyhavesolvedcurrentandfutureproblemsrelatingtoblockchaintechnologybutwillalsobeabletobuildefficientdecentralizedapplications.

·7.9萬(wàn)字

會(huì)員

Mastering Arduino

MasteringArduinoisanall-in-oneguidetogettingthemostoutofyourArduino.Thispractical,no-nonsenseguideteachesyoualloftheelectronicsandprogrammingskillsthatyouneedtocreateadvancedArduinoprojects.Thisbookispackedfullofreal-worldprojectsforyoutopracticeon,bringingalloftheknowledgeinthebooktogetherandgivingyoutheskillstobuildyourownrobotfromtheexamplesinthisbook.Thefinaltwochaptersdiscusswirelesstechnologiesandhowtheycanbeusedinyourprojects.Thebookbeginswiththebasicsofelectronics,makingsurethatyouunderstandcomponents,circuits,andprototypingbeforemovingon.Itthenperformsthesamefunctionforcode,gettingyouintotheArduinoIDEandshowingyouhowtoconnecttheArduinotoacomputerandrunsimpleprojectsonyourArduino.Oncethebasicsareoutoftheway,thenext10chaptersofthebookfocusonsmallprojectscenteredaroundparticularcomponents,suchasLCDdisplays,steppermotors,orvoicesynthesizers.Eachofthesechapterswillgetyoufamiliarwiththetechnologyinvolved,howtobuildwithit,howtoprogramit,andhowitcanbeusedinyourownprojects.

·7.5萬(wàn)字

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The Modern C# Challenge

C#isamulti-paradigmprogramminglanguage.TheModernC#Challengecoverswithaspectsofthe.NETFrameworksuchastheTaskParallelLibrary(TPL)andCryptoAPI.Italsoencouragesyoutoexploreimportantprogrammingtrade-offssuchastimeversusspaceorsimplicity.Theremaybemanywaystosolveaproblemandthereisoftennosinglerightway,butsomesolutionsaredefinitelybetterthanothers.Thisbookhascombinedthesesolutionstohelpyousolvereal-worldproblemswithC#.Inadditiontodescribingprogrammingtrade-offs,TheModernC#Challengewillhelpyoubuildausefultoolkitoftechniquessuchasvaluecaching,statisticalanalysis,andgeometricalgorithms.Bytheendofthisbook,youwillhavewalkedthroughchallengesinC#andexploredthe.NETFrameworkinordertodevelopprogramlogicforreal-worldapplications.

·7.7萬(wàn)字

會(huì)員

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(wàn)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(wàn)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.

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Improving your C# Skills

ThisLearningPathshowsyouhowtocreatehighperformingapplicationsandsolveprogrammingchallengesusingawiderangeofC#features.You’llbeginbylearninghowtoidentifythebottlenecksinwritingprograms,highlightcommonperformancepitfalls,andapplystrategiestodetectandresolvetheseissuesearly.You'llalsostudytheimportanceofmicro-servicesarchitectureforbuildingfastapplicationsandimplementingresiliencyandsecurityin.NETCore.Then,you'llstudytheimportanceofdefiningandtestingboundaries,abstractingawaythird-partycode,andworkingwithdifferenttypesoftestdouble,suchasspies,mocks,andfakes.Inadditiontodescribingprogrammingtrade-offs,thisLearningPathwillalsohelpyoubuildausefultoolkitoftechniques,includingvaluecaching,statisticalanalysis,andgeometricalgorithms.ThisLearningPathincludescontentfromthefollowingPacktproducts:C#7and.NETCore2.0HighPerformancebyOvaisMehboobAhmedKhan.PracticalTest-DrivenDevelopmentusingC#7byJohnCallaway,ClaytonHunt.TheModernC#ChallengebyRodStephens.

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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.

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