Video: Puas yog siv los nyeem cov ntaub ntawv ntawm ib qho optical disc?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A disk tsav uas siv laser beams rau nyeem thiab sau cov ntaub ntawv ntawm qhov chaw ntawm ib qho optical disc . Thaum lub CD tuaj yeem tuav 700 MB ntawm cov ntaub ntawv thiab ib qho yooj yim DVD tuaj yeem tuav 4.7 GB ntawm cov ntaub ntawv , ib leeg Blu-duab tshav disc tuaj yeem tuav txog 25 GB ntawm cov ntaub ntawv.
Ib yam li ntawd, cov ntaub ntawv nyeem los ntawm optical disc li cas?
Kho qhov muag cov cuab yeej cia txuag cov ntaub ntawv raws li cov qauv ntawm cov dots uas tuaj yeem ua tau nyeem siv lub teeb. Lub teeb laser yog lub teeb ci li niaj zaus. Cov cov ntaub ntawv ntawm qhov nruab nrab cia yog nyeem los ntawm bouncing lub laser beam tawm ntawm qhov nruab nrab. Cov txheej txheem no hu ua 'hlawv' cov ntaub ntawv rau a disc.
Kuj Paub, cov cuab yeej kho qhov muag yuav nyeem thiab sau cov ntaub ntawv li cas? Optical cia yog ib qho hom cia uas cov ntaub ntawv yog sau thiab nyeem nrog laser. Feem ntau, cov ntaub ntawv yog sau rau optical media , xws li compact discs (CDs) thiab DVDs. Optical media yog ruaj dua li daim kab xev, HDDs thiab flash tsav thiab yooj yim dua rau ib puag ncig tej yam kev mob.
Ib yam li ntawd, lub khoos phis tawj siv li cas los nyeem cov ntaub ntawv ntawm optical disc?
Kho qhov muag cia, hluav taws xob cia nruab nrab uas siv low-power laser beams rau sau thiab khaws cia digital (binary) cov ntaub ntawv . Hauv kho qhov muag -Storage technology, ib tug laser beam encodes digital cov ntaub ntawv pe ib kho qhov muag los yog laser, disk nyob rau hauv daim ntawv ntawm me me pits teem nyob rau hauv concentric lem ntawm lub disk cov nto.
Cov ntaub ntawv khaws cia thiab nyeem li cas ntawm optical storage media?
Kho qhov muag cia yog cov khaws cia ntawm cov ntaub ntawv ntawm optically nyeem tau nruab nrab . Cov ntaub ntawv yog sau los ntawm kev ua cov cim nyob rau hauv ib tug qauv uas yuav ua tau nyeem rov qab nrog kev pab ntawm lub teeb, feem ntau yog ib tug nqaj ntawm laser lub teeb precisely teem rau ib tug spinning optical disc.
Pom zoo:
Tus qauv twg yog siv los hloov cov ntaub ntawv kho mob thiab kev tswj hwm ntawm ntau lub tsev kho mob cov ntaub ntawv xov xwm HIS)?
Kev Noj Qab Haus Huv Qib Xya lossis HL7 yog hais txog cov txheej txheem thoob ntiaj teb rau kev hloov pauv cov ntaub ntawv kho mob thiab kev tswj hwm ntawm cov ntawv thov software siv los ntawm ntau tus kws kho mob. Cov qauv no tsom rau cov txheej txheem thov, uas yog 'txheej 7' hauv OSI qauv
Dab tsi yog tus lej ncaj qha uas yuav tsum raug tshem tawm ntawm cov ntaub ntawv tshawb fawb kom ua raws li kev siv cov ntaub ntawv txwv?
Cov ntaub ntawv qhia ncaj qha hauv qab no yuav tsum raug tshem tawm rau PHI kom tsim nyog raws li cov ntaub ntawv txwv: (1) Cov npe; (2) Cov ntaub ntawv chaw nyob xa ntawv, tsis yog lub nroog lossis nroog, xeev, thiab ZIP code; (3) xov tooj; (4) fax xov tooj; (5) email chaw nyob; (6) social security naj npawb; (7) cov ntaub ntawv kho mob; (8) kev npaj kho mob
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Yuav ua li cas rau txim nyob rau hauv Is Nrias teb rau nyiag computer cov ntaub ntawv cov cuab tam los yog tej software qhov chaw code los ntawm ib tug neeg lub koom haum los yog los ntawm lwm yam txhais tau tias?
Kev piav qhia: Kev rau txim hauv Is Nrias teb rau kev nyiag cov ntaub ntawv hauv computer, cov khoom muaj nqis lossis ib qho software cov cai los ntawm ib lub koom haum, ib tus neeg, lossis los ntawm lwm txoj kev yog raug kaw 3 xyoo thiab raug nplua ntawm Rs. 500,000
Nws puas tuaj yeem nyeem los ntawm thiab sau rau qhov chaw nyob hauv cov ntaub ntawv siv Java?
Siv cov ntaub ntawv nkag mus random, peb tuaj yeem nyeem los ntawm cov ntaub ntawv thiab sau rau hauv cov ntaub ntawv. Kev nyeem ntawv thiab sau ntawv siv cov ntaub ntawv tawm tswv yim thiab tso tawm cov kwj deg yog cov txheej txheem ua ntu zus. Siv cov ntaub ntawv nkag mus random, peb tuaj yeem nyeem lossis sau ntawm txhua txoj haujlwm hauv cov ntaub ntawv. Ib yam khoom ntawm RandomAccessFile chav kawm tuaj yeem ua cov ntaub ntawv nkag mus