2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib qho tseem ceeb tshaj plaws hauv keeb kwm ntawm TV yog Vladimir Zworykin (1889-1982), uas tau tsim lub " iconoscope," "kinemascope,"thiab "txoj cai khaws cia.” uas dhau los ua lub hauv paus ntawm TV raws li peb paub.
Vladimir Zworykin tau tsim dab tsi?
Vladimir Zworykin, tag nrho Vladimir Kosma Zworykin, (yug Lub Xya Hli 29 [Lub Xya Hli 17, Qub Style], 1888, Murom, Russia-tuag Lub Xya Hli 29, 1982, Princeton, New Jersey, Tebchaws Asmeskas), Lavxias-yug Asmeskas electronic engineer thiab inventor ntawm lub iconoscope thiab kinescope TV systems.
Leej twg tsim lub iconoscope?
electron tubes
Zworykin (lub Iconoscope) hauv xyoo 1924 thiab los ntawm Philo T. Farnsworth (Lub Duab Dissector) hauv xyoo 1927. Cov kev tsim kho thaum ntxov no tau ua tiav sai. ib tug series ntawm kev txhim kho raj xws li lub Orthicon, Duab Orthicon, thiab Vidicon. Kev ua haujlwm ntawm lub koob yees duab raj yog raws li…
Leej twg tsim TV Zvorykin?
Vladimir Zworykin kuj yog qee zaum raug suav tias yog leej txiv ntawm hluav taws xob TV vim nws tsim lub iconoscope hauv xyoo 1923 thiab nws qhov kev tsim kho ntawm kinescope hauv 1929. Nws tsim yog ib qho. ntawm thawj zaug ua qauv qhia lub TV nrog tag nrho cov yam ntxwv ntawm cov duab niaj hnub.
Dr Zworykin koom nrog RCA li cas?
Dr. Zworykin, ib tug neeg Amelikas uas yog neeg Amelikas uas tau txais txiaj ntsig los ntawm cov thawj cojtxoj kev loj hlob ntawm electron microscope, tau ua haujlwm tus thawj coj ntawmRCA Laboratories hauv Princeton. Txij li thaum nws so haujlwm xyoo 1954 nws yog tus thawj tswj hwm hwm ntawm RCA.
Pom zoo:
Dab tsi ntawm qhov tshwm sim hauv qab no tau sim ua pov thawj los ntawm?
The Meselson thiab Stahl kev sim yog qhov kev sim ua pov thawj tias DNA rov ua dua yog ib nrab kev saib xyuas ib nrab kev saib xyuas Semiconservative replication piav qhia lub tshuab ntawm DNA rov ua dua hauv txhua lub hlwb paub. … Cov txheej txheem no hu ua semi-conservative replication vim hais tias ob daim ntawv luam ntawm tus thawj DNA molecule raug tsim.
Ntawm qhov twg ntawm cov ces kaum hauv qab no yog cov haujlwm cosecant tsis tau txhais?
Qhov tseeb, tus nqi xa rov qab los ntawm kev ua haujlwm cosecant rau lub kaum sab xis ntawm xoom degrees lossis ib puas yim caum degrees yog suav tias yog tsis tau txhais, txij li qhov sib npaug csc (θ)= 1 / sin θ ) yuav suav nrog kev faib los ntawm xoom.
Qhov twg yog qhov loj tshaj ntawm nqa tau tsim los ntawm aerofoil?
Ntawm lub hom phiaj dav dav aerofoil qhov loj tshaj plaws ntawm Lift tshwm sim rau saum npoo (qhov twg nws nkhaus tshaj plaws). Feem ntau hais txog 80% ntawm nqa tau tshwm sim ntawm lub tis saum npoo. Nqa yog proportional rau square ntawm airspeed.
Qhov twg hauv qab no yog tsim los ntawm pyrenoids?
Cov pyrenoid, cov qauv ntom ntom sab hauv lossis ib sab ntawm chloroplasts ntawm qee cov algae, muaj ntau ntawm ribulose biphosphate carboxylase, ib qho ntawm cov enzymes tsim nyog hauv photosynthesis rau carbon fixation thiab yog li qab zib tsim.
Thaum qhov kev ncua deb me me qhov twg ntawm qhov yuam kev hauv qab no tsis tsim nyog?
Thaum qhov kev ncua deb me me qhov twg ntawm qhov yuam kev hauv qab no tsis tsim nyog? Nqe lus piav qhia: Cov txiaj ntsig ntawm curvature yog txhawm rau nyeem cov pas nrig. Thaum qhov deb me me qhov yuam kev yog negligible. Qhov twg ntawm qhov yuam kev hauv qab no los ntawm tus kheej yuam kev?
