Cov txheej txheem:
Video: Qhov zoo ntawm Raspberry Pi yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov Raspberry Pi tau pom nws txoj hauv kev mus rau thehobbyist kev lag luam rau kev suav, tab sis nws kuj muaj peev xwm heev rau kev lag luam thiab kev siv tus kheej ib yam nkaus. Ib qho tsis tshua muaj hluav taws xob tsawg, daim ntawv me me, tsis muaj suab nrov, cov khoom hauv lub xeev cia, thiab lwm yam ua rau nws muaj txiaj ntsig zoo rau cov khoom siv me me thiab lub teeb hnyav.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog lub ntsiab lus ntawm Raspberry Pi?
Cov Raspberry Pi yog tus nqi qis, credit-card sizedcomputer uas ntsaws rau hauv lub computer saib lossis TV, thiab siv tus qauv keyboard thiab nas. Nws yog ib lub cuab yeej me me uas muaj peev xwm ua rau tib neeg ntawm txhua lub hnub nyoog los tshawb txog kev suav, thiab kawm yuav ua li cas rau kev pab cuam hauv hom lus xws li Scratch thiab Python.
Ib sab saum toj no, vim li cas Python siv hauv Raspberry Pi? Python yog ib hom lus muaj txiaj ntsig zoo heev uas muaj kev nyeem yooj yim syntax, thiab tso cai rau cov programmers siv tsawg kab ntawm cov cai tshaj li yuav ua tau nyob rau hauv cov lus xws li asassembly, C, los yog Java. Cov Python programming lus tau pib ua lus sau rau Linux.
Ib yam li ib tug yuav nug, koj puas tuaj yeem siv Raspberry Pi ua tus server?
Amazingly, lub Raspberry Pi tuaj yeem siv los ua lub vev xaib server , tej zaum yog ib lub zos server rau intranet pagesor lub chaw taws teeb server hosting cov nplooj ntawv web hauv internet. Apache ua tau raug ntsia, ib leeg los yog siv LAMP (uas yogLinux + Apache/MySQL/PHP).
Dab tsi yog cov khoom ntawm Raspberry Pi?
Tag nrho cov specs rau Raspberry Pi 3 suav nrog:
- CPU: Quad-core 64-ntsis ARM Cortex A53 clocked ntawm 1.2 GHz.
- GPU: 400MHz VideoCore IV multimedia.
- Nco: 1GB LPDDR2-900 SDRAM (piv txwv li 900MHz)
- USB chaw nres nkoj: 4.
- Video outputs: HDMI, composite video (PAL thiab NTSC) ntawm 3.5 mmjack.
- Network: 10/100Mbps Ethernet thiab 802.11n Wireless LAN.
Pom zoo:
Dab tsi yog qhov piv txwv ntawm qhov zoo nrog rau qhov zoo network sab nraud cuam tshuam?
Cov piv txwv classic yog xov tooj, qhov twg ntau tus neeg siv nce tus nqi rau txhua tus. Qhov zoo sab nraud yog tsim thaum lub xov tooj tau yuav yam tsis muaj nws tus tswv xav tsim kom muaj txiaj ntsig rau lwm tus neeg siv, tab sis ua li ntawd txawm tias
Dab tsi yog qhov txawv ntawm kev sib raug zoo unary kev sib raug zoo binary thiab kev sib raug zoo ternary?
Kev sib raug zoo tsis sib xws yog thaum ob tus neeg koom hauv kev sib raug zoo yog tib lub koom haum. Piv txwv li: Cov ncauj lus yuav yog qhov yuav tsum tau ua ua ntej rau lwm yam kev kawm. Kev sib raug zoo ternary yog thaum peb lub koom haum koom nrog kev sib raug zoo
Dab tsi yog sparse kem Dab tsi yog qhov zoo thiab qhov tsis zoo?
Koj poob 4 bytes tsis yog ib zaug ib kab; tab sis rau txhua lub cell hauv kab uas tsis yog null. Qhov zoo ntawm SPARSE kem yog: Qhov tsis zoo ntawm SPARSE kem yog: SPARSE kem tsis tuaj yeem siv rau ntawm cov ntawv, ntext, duab, timestamp, geometry, geography lossis cov neeg siv cov ntaub ntawv teev tseg
Dab tsi yog qhov qub txeeg qub teg Dab tsi yog qhov sib txawv ntawm qhov qub txeeg qub teg piav nrog piv txwv?
Inheritance yog ib txoj hauv kev kom tau txais cov yam ntxwv thiab kev coj cwj pwm ntawm ib chav kawm los ntawm lwm chav kawm. Cov chav kawm uas cov tswv cuab tau txais qub txeeg qub teg yog hu ua chav kawm hauv paus, thiab chav kawm uas tau txais cov tswv cuab tam sim no hu ua chav derived. Inheritance siv IS-A kev sib raug zoo
Dab tsi yog qhov zoo sib xws thiab qhov txawv ntawm relays thiab PLC yog dab tsi?
Relays yog electro-mechanical keyboards uas muaj coil thiab ob hom kev sib cuag uas tsis yog NO & NC. Tab sis Programmable Logic Controller, PLC yog lub khoos phis tawj me uas tuaj yeem txiav txim siab raws li qhov kev zov me nyuam thiab nws cov tswv yim & tso tawm