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Visual organs
Visual organs
30/12/2021 99up 3051Views

IntroductiontothevisualorgansThevisualorgansarethereceptorsforhumansandanimalstoperceiveexternalthingsthroughtheactionoflight.Lightactsonthevisualorganstoexcitethesensorycells,andtheinformationisproce...

Advanced foreign standards
Advanced foreign standards
30/12/2021 38up 2647Views

InternationalorganizationsInternationalorganizationsnotlistedinthe"KWICIndex":InternationalTelecommunicationUnion(ITU)p>InternationalFederationofFilmTechnologyAssociations(UNIATEC)UniversalPostalUnion...

Communication theory
Communication theory
30/12/2021 13up 2595Views

CommunicationTheoryAvarietyoftheoreticalproblemstorealizetheidealcommunicationsystemofClaudeElwoodShannon.Shannon'sinformationtheorysolvestheproblemoftheexistenceofidealencodersanddecodersonthebasisof...

Salary level
Salary level
30/12/2021 67up 2775Views

HierarchySalarylevelsaredividedintodifferentlevels.Itcanrefertotheaveragesalarylevelofemployeesinacountry,region,departmentorcompanyduringacertainperiodoftime,oritcanrefertoaspecificThesalarylevelofpr...

U.S. Environmental Protection Agency
U.S. Environmental Protection Agency
30/12/2021 49up 2500Views

SynonymouswiththeU.S.EnvironmentalProtectionAgency,generallyreferstotheU.S.EnvironmentalProtectionAgency'sInstitutionalFunctionsBeforetheestablishmentoftheEnvironmentalProtectionAgency,thefederalgover...

Electronic technology
Electronic technology
29/12/2021 31up 2411Views

DevelopmentstageElectronictechnologyisanemergingtechnologythatbegantodevelopfromtheendofthenineteenthcenturytothebeginningofthetwentiethcentury.Itdevelopedthefastestandmostwidelyusedinthetwentiethcent...

Statistics of Science and Technology
Statistics of Science and Technology
29/12/2021 67up 2590Views

ResearchcontentTheresearchcontentmainlyincludesthefollowingaspects:(1)Thelevelandstructureofthescientificandtechnologicalstatisticalindicatorsystem.(2)Scientificandtechnicalstatisticalanalysisrollinge...

National English Test
National English Test
29/12/2021 76up 2531Views

SynonymsTheNationalPublicEnglishTestgenerallyreferstotheNationalEnglishTestABriefHistoryofPETSInJune1999,theTestCenteroftheMinistryofEducationheldapressconferencetoformallyintroducethePETStestsystemto...

Wireless communication
Wireless communication
29/12/2021 87up 2753Views

HistoryOpticaltelephoneThefirstwirelesstelephoneconversationintheworldappearedin1880.Atthattime,theopticaltelephonewasusedbyAlexanderGraham.BellandCharlesSumnerTianteinventedandappliedforapatent.Optic...

Raw data
Raw data
29/12/2021 34up 2697Views

DefinitionInthedatabase:Rawdata,alsoknownasuserdata,isdatathathasnotbeenprocessedorsimplified.Thesedatamayormaynotbeinmachine-readableform.Itconstitutesdatathatphysicallyexists.Generallytherearesevera...

Bridge
Bridge
28/12/2021 7up 2733Views

Thesynonymbridgegenerallyreferstoanetworkbridge.PrincipleAnetworkbridgeconnectstwosimilarnetworksandmanagestheflowofnetworkdata.Itworksatthedatalinklayer,whichcannotonlyextendthedistanceorrangeofthene...

Mengxi written talk
Mengxi written talk
28/12/2021 5up 2706Views

IntroductiontotheworkMengxiBiTanincludesthreeparts:BiTan,ComplementBiTan,andContinueBiTan,whichcontainsShenKuo’slifeexperiencesandopinions.Twenty-sixvolumesof"BiTan"aredividedintoseventeensubjects.Eac...

Memo
Memo
28/12/2021 86up 2840Views

PinyinbiànjiānBasicmeaning1.Withacertainquality,sizeorcrease,suitablefornotes,lettersandnotesNotesusedforwriting;memos2.Briefinformationusedintheworkprocess.3.Notebooksormemosthatcanberecordedinthepro...

Contradictions among the people
Contradictions among the people
28/12/2021 9up 2359Views

NomenclatureInterpretationContradictionsarisingonthebasisofthefundamentalunanimityoftheinterestsofthepeople.Itisnon-antagonisticbetweentheworkingpeople,andbetweentheworkingpeopleandtheexploitingclasst...

Analog computer
Analog computer
28/12/2021 39up 2614Views

DevelopmentprofileInthe1930s,hebegantodevotehimselftotheresearchanddevelopmentoffullyelectronicanalogcomputers.DuringWorldWarII,BellTelephoneLaboratoriesdevelopedtheM-9artillerycommander.AfterWorldWar...

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