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Error value
15/05/2022 803
Error value

DefinitionWhenthespreadsheetsoftware(suchasExcel)cannotcalculatetheformulaforacell,thespreadsheetsoftwaredisplaysthevalueinthiscell.Itspurposeistopromptcertainplaces——Eithertheformulaitself,orthecellr...

Risky decision
15/05/2022 969
Risky decision

BriefintroductionRiskdecision-makingisalsocalled"randomdecision-making".Inthiskindofdecision-making,therearemultipleoutcomesofthedecision,andthedecisionmakerdoesnotknowwhichoutcomewilloccur,buttheprob...

Physical network
14/05/2022 960
Physical network

DefinitionThenetwork"connected"bythecomputerhardwaremediabytheTCPfactoryiscalledthephysicsweb.Currently,thetransmissioncontrolprotocolInternetprotocolTCP/IPiscommonlyused,thatis,thetransmissionlayerIP...

Songyan
14/05/2022 918
Songyan

Explanation1.Theblackashthatiscondensedafterburningpinewoodistherawmaterialformakingpinesmokeink.2.Referstoink.3.Referstothesmokecloudsinthepineforest.SourceJinWeishuo's"Bizhentu":"Theinkistakenfromth...

Modern communication technology
13/05/2022 1071
Modern communication technology

ConceptTheso-calledcommunication,thesimplestandmostbasicunderstanding,isthemethodofcommunicationbetweenpeople.WhetheritisthetelephoneortheInternet,themostbasicproblemsolvedisactuallythecommunicationbe...

Precision guided weapon
13/05/2022 1006
Precision guided weapon

Developmenthistory1.EarlyguidedweaponsThefirstappearanceofguidedweaponswasduringtheSecondWorldWar,whentheBritishAirForcefirstappearedonMay12,1943.Thedaily"Freedom"patrolbomberthrewasound-seekingtorped...

books
12/05/2022 1027
books

WordconceptsBasicexplanation[books]Thegeneraltermforbooksboundintobooks.Militarybooks.BooksprintedonplateshavenotyetbeenpromotedbytheTangpeople.——Song·ShenKuo,"MengxiBiTan·LakeBoard"Citation...

political system
12/05/2022 922
political system

SynonymsThetermssimilartothepoliticalsystemalsoinclude"regimeform","stateform","governmentform","regimeorganizationform","statestructureform"and"Governmentsystem",theseareallclassifiedtermsforpolitics...

Symmetric Algorithm
11/05/2022 768
Symmetric Algorithm

PrincipleTheencryptionanddecryptionofthesymmetricalgorithmisexpressedas:Ek(M)=CDk(C)=MSymmetricalgorithmscanbedividedintotwocategories.Analgorithmthatonlyoperatesonasinglebit(sometimesabyte)intheplain...

Digital signal
11/05/2022 822
Digital signal

IntroductionTheinformationagehascomewithoutnotice.Wearesurroundedbyvarioussignalsallthetime.Theessenceofthesignalisthephysicalquantitythatrepresentsthemessage(information),suchascommonInthesinusoidale...

Behavioral Learning Theory
10/05/2022 935
Behavioral Learning Theory

ConceptBehavioristsbelievethatlearningistheconnectionbetweenstimuliandresponse.Theirbasicassumptionisthatbehavioristhelearner’sresponsetoenvironmentalstimuli.Theyregardtheenvironmentasastimulus,theacc...

storage card
10/05/2022 1037
storage card

MMCseriesMMCDuetothelargesizeoftraditionalCFcards,InfineonandSanDiskjointlylaunchedanewmemorycardproductin1997MultiMediaCard(MMCcardforshort).ThesizeoftheMMCcardis32mm×24mm×1.4mm,witha7-pininterfacean...

Circuit switched network
09/05/2022 876
Circuit switched network

ClassificationTherearetwomaintypesofcircuit-switchednetworks,publicswitchedtelephonenetwork(PSTN)andintegratedservicesdigitalnetwork(ISDN),whichwillbeintroducedseparatelybelow.PublicSwitchedTelephoneN...

Carl Zeiss
09/05/2022 920
Carl Zeiss

>EarlydaysIn1846,attheageof30,CarlZeissestablishedaprecisionopticalinstrumentfactoryinJenaandproduceditin1847Outofhisfirstmicroscope.Since1866,withtheassistanceofErnstAbbeandOttoSchott,theZeissfactory...

Microphone
08/05/2022 1094
Microphone

BriefintroductionThemicrophoneisoneoftheimportantpartsofthetelephone.Itcanconvertsoundintovoicecurrent,soitisanacoustic-electricconversiondevice.Microphonesaregenerallydividedintotwocategories,namelyl...