google android operating system user manual
The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System
... UniversityPittsburgh, PA 15213Appeared in Proceedings of the 11th Operating Systems Principles,November, 1987AbstractMach is a multiprocessor operating system being implemented at Carnegie-Mellon University. ... Collins and L.W. Loen. System/ 38 Machine Storage Management.IBM System/ 38 Technical Developments, IBM General Systems Division :63-66, 1978.[7] Gupta, A.Parallel Production Systems.PhD thesis, ... November, 1984.[9] Kahn, K.C. et al.iMAX: A Multiprocessor Operating System for an Object-Based Computer.In Proc. 8th Symposium on Operating Systems Principles, pages 127-136. ACM, December, 1981.[10]...
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Sinometer-MS8211-Digital-Multimeter-User-Manual
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Thebatteryisnotsufficientforproperoperation.1.4MAINTENANCE1.4.1PleasedonotattempttoadjustorrepairthemeterbyremovingtherearcasewhilevoltageisbeingWARNINGBEEXTREMELYCAREFULINTHEUSEOFTHISMETER.Improperuseofthisdevicecanresultinelectricshockordestroyofthemeter.Followallsafeguardssuggestedinthismanualandthenormalsafetyprecautionsusedinworkingwithelectricalcircuits.Donotservicethisdeviceifyouarenotqualifiedtodoso.Toensuresafeoperation,andinordertoexploittothefullthefunctionalityofthemeter,pleasefollowthedirectionsinthissectioncarefully.ThismeterhasbeendesignedaccordingtoIEC-1010concerningelectronicmeasuringinstrumentswithanovervoltagecategoryCATⅢ600Vandpollution2.Followallsafetyandoperatinginstructionstoensurethatthemeterisusedsafelyandiskeptingoodoperatingcondition.Withproperuseandcare,thedigitalmeterwillgiveyouyearsofsatisfactoryservice.1.1PRELIMINARY1.1.1Whenusingthemeter,theusermustobserveallnormalsafetyrulesconcerning:-Protectionagainstthedangersofelectricalcurrent.-Protectionofthemeteragainstmisuse.1.1.2Whenthemeterisdelivered,checkthatithasnotbeendamagedintransit.1.1.3Whenpoorconditionunderharshpreservationorshippingconditionscaused,inspectandconfirmthismeterwithoutdelay.1.1.4Beforeusingtocheckforvoltage,alwaystestthemeteronaknownlivecircuittoverifythatthedetectfunctionofthemeterisworkingproperly.1.1.5Testleadortestclipmustbeingoodcondition.Beforeusingverifythattheinsulationontestleadortestclipisnotdamagedand/ortheleadswireisnotexposed.1.1.6Fullcompliancewithsafetystandardscanbeguaranteedonlyifusedwithtestleadssupplied.Ifnecessary,theymustbereplacedwiththesamemodelorsameelectricratings. User& apos;sManualSinoMeter MS8211⑵TestClip:ElectricRatings600V10Aonepiece⑶Battery:1.5V,AAAtwopieces⑷InstructionManualonepieceRangeResolutionFunction0.001VDisplay:readapproximateforwardvoltageofdiode-ForwardDCCurrent:approx.1mA-ReversedDCVoltage:approx.1.5V-OverloadProtection:250VDCorrmsAC3.2.6ACVoltageDetectRangeTESTSensitivityVoltagesensitivity>50V，adjustcontinuouslyFrequency50HzDistance<150mm（changealongwiththesensitivity）-Non-contactdetecting4.OPERATINGINSTRUCTION4.1DATAHOLDIfyouneeddataholdwhenmeasuring,youcanputon“DATA-H”button,itwillholdthereading;ifyouputthebuttonagain,dataholdisnotcontinue.4.2MAXIMUMVALUEMEASURINGANDHOLDAttherangeofvoltage,youcanputon“MAX.H”button,itwillholdthemaximumvalue;ifyouputthebuttonagain,themaximumvaluewillnotbeheld.4.3FUNCTIONTRANSFORMPutdownthe"FUNC."whenmeasuringthevoltage.MeterwillbetransformedbetweenDCandACrange.Put"FUNC."whenmeasuringtheresistance,diodeandcontinuity,meterwilltransformamongthem.4.4RANGETRANSFORMTheautorangeisusedwhenmeasuringthevoltageandresistance.Putdownthe"RANGE"ifthemanualrangeisneeded.Eachtimeyouputdown,rangewillgoupward;theminimumrangeistransformedif"RANGE"isputdownatthemaximumrange.Ifthe"RANGE"isputdownmorethantwoseconds,autorangeisusedagain.4.5AUTOPOWEROFFIfthere’snoanyoperationwithinfifteenminutesafterpowerison,meterwillautopoweroffwithfiveshortsoundsandalongsoundinaminute.Afterautopoweroff,ifstirthetransformswitchorputdownanybuttonof“FUNC.”,“DATA-H”,”MAX.H”,”RANGE”,meterwillrecovertheworkingcondition.Ifpressesthe“FUNC.”whenpowerison,autopoweroffdisable.NOTE:AttheTESTrange(ACVdetecting),thereisnoautopowerofffunction4.6PREPARATIONFORMEASUREMENT4.6.1Setthetransformswitchtotherightrange.Atthemanualrange,whenthevaluescaletobe4.12.1Rotatetheprobesocketanti-clockwisetospintheprobeintothemeter.4.12.2SetthetransformswitchattheVrangeposition.4.12.3Besurethatthedisplayisnotshown“”,otherwise,thebatteryshouldbereplaced.4.12.4SetthetransformswitchtotheTESTrange.ThenthegreenLEDoftheLEDIndicatorisbright.4.12.5Rotatethesensitivityadjustingknobinthemiddleofthetransformswitchanti-clockwise,setthemetertothehighestdetectingsensitivityinordertoenlargethedetectingrange.4.12.6Puttheprobesocketclosetotheleadorthepowersocket,IfACelectricalvoltageispresent,theredLEDIndicatorwhichinfrontofthemeterwillflashandtheaudiblewarningwillsound.4.12.7Intheplaceswithmanyleadsandjacks,rotatethesensitivityadjustingknobinthemiddleofthetransformswitchclockwise,setthemetertothelowerdetectingsensitivityinordertoconfirmwhichoneiselectriferous.NOTE:-WhenusingACVdetectingfunction,alwayssetthemetertothehighestsensitivity.-Inthisrange,eventhoughthereisnoanysoundandlightindication,themeterwillstillconsumeelectricity.-Thereisnoautopowerofffunctioninthisrange.-AlwayssetthepowerswitchtotheOFFpositionwhenthemeterisnotinuse.5.MAINTENANCE5.1BATTERYREPLACEMENTWARNINGBeforeattemptingtoopenthebatterycoverofthemeter,besurethattheprobetipofthemeterandtestlead(ortestclip)havebeendisconnectedfrommeasurementcircuittoavoidelectricshockhazard.5.1.1Ifthesign‘’appearsontheLCDdisplay,itindicatesthatthebatteryshouldbereplaced.5.1.2Loosenthescrewfixingthebatterycoverandremoveit.5.1.3Replacetheexhaustedbatterywithanewone.5.1.4Putthebatterycoverasitsorigin.5.2TESTLEADS(ORTESTCLIP)REPLACEMENTWARNINGFullincompliancewithsafetystandardscanbeguaranteedonlyifusedwithtestleadssupplied.Ifnecessary,theymustbereplacedwiththesamemodelorsameelectricratings.Electricratingsofthetestleads:600V10A.Youmustbereplacedthetestleadiftheleadisexposed.6.ACCESSORIES⑴TestLead:ElectricRatings600V10Aonepiece(ortestclip)totheotherside.4.8.6YoucangetreadingfromLCDdisplay.WARNINGRiskofElectrocution.Youcan’tinputthevoltagewhichishigherthan600VrmsAC,it’spossibletoshowhighervoltage,butitmaydamagetheinnercircuitorcauseelectricalshock.Payattentiontoavoidgettinganelectricshockwhenmeasuringvoltage.NOTE:-Atthemanualrangemode,whenonlythefigure‘OL’isdisplayed,itindicatesoverrangesituationandthehigherrangehastobeselected.-Atthelittlevoltagerange,themeterwillshowunsteadyreadingwhentestleadshaven’treachthecircuit,it’snormalbecausethemeterisverysensitivity.Whentestleadstouchthecircuit,youcangetthetruereading.-Atthemanualrangemode,whenthevaluescaletobemeasuredisunknownbeforehand,selecttherangeatthehighestpositionandsetdowngradually.-TransformtothemanualrangewhenusethemVrange.4.9MEASURINGRESISTANCE4.9.1Rotatetheprobesocketclockwisetospinouttheprobefromthemeter.4.9.2InserttheblacktestleadortestclipintheCOMjack.4.9.3Setthetransformswitchatthe(rangeposition.Autorangeormanualrangecanbetransformedbyputtingthe“RANGE”.4.9.4Connecttheprobetipofthemetertoonesideofthetestedcircuitandprobetipofthetestlead(ortestclip)totheotherside.4.9.5YoucangetreadingfromLCDdisplay.WARNINGRiskofElectrocution.Whenmeasuringin-circuitresistance,besurethecircuitundertesthasallpowerremovedandthatallcapacitorshavebeendischargedfully.NOTE:-Atthemanualrangemode,whenonlythefigure‘OL’isdisplayed,itindicatesoverrangesituationandthehigherrangehastobeselected.-Formeasuringresistanceabove1MΩ,themetermaytakeafewsecondstogetstablereading.-Whentheinputisnotconnected,i.e.atopencircuit,thefigure‘OL’willbedisplayedfortheoverrangecondition.3.2.1DCVoltageRangeResolutionAccuracy200mV0.1mV2V0.001V20V0.01V±（0.7%ofrdg+2digits）200V0.1V600V1V-InputImpedance:10MΩ-OverloadProtection:200mVrange:250VDCorACrms,2V-600Vranges:DC600VorAC600Vrms.-Max.InputVoltage:600VDC3.2.2ACVoltageRangeResolutionAccuracy200mV0.1mV2V0.001V±（0.8%ofrdg+3digits）20V0.01V200V0.1V600V1V±（1.0%ofrdg+3digits）-InputImpedance:10MΩ-OverloadProtection:200mVrange:250VDCorACrms,2V-600Vranges:DC600VorAC600Vrms.-FrequencyRange:40to400Hz-Response:Average,calibratedinrmsofsinewave.-Max.InputVoltage:600VrmsAC3.2.3ResistanceRangeResolutionAccuracy200Ω0.1Ω±（1.0%ofrdg+3digits）2kΩ0.001kΩ20kΩ0.01kΩ±（1.0%ofrdg+1digit）200kΩ0.1kΩ2MΩ0.001MΩ20MΩ0.01MΩ±（1.0%ofrdg+5digits）-OpenCircuitVoltage:0.25V-OverloadProtection:250VDCorrmsAC3.2.4ContinuityRangeFunctionBuilt-inbuzzerwillsound,ifresistanceislowerthan50(.-Opencircuitvoltage:approx.0.5V-OverloadProtection:250VDCorrmsAC3.2.5Diode4.10TESTINGDIODE4.10.1Rotatetheprobesocketclockwisetospinouttheprobefromthemeter.4.10.2InserttheblacktestleadortestclipintheCOMjack.4.10.3Setthetransformswitchattherangeposition.4.10.4putdownthe"FUNC."transformedattest.4.10.5Connecttheprobetipofthemetertotheanodeofthediode,theblacktestlead(ortestclip)tothecathodeofthediode.4.10.6YoucangetreadingfromLCDdisplay.NOTE:-Themeterwillshowtheapproximateforwardvoltagedropofthediode.-Ifthemeterandtheleadconnectionisreversed,onlyfigure‘OL’willbedisplayed.-Whentheinputisnotconnected,i.e.atopencircuit,thefigure‘OL’willbedisplayed.4.11CONTINUITYTESTWARNINGRiskofElectrocution.Whentestingthecircuitcontinuity,besurethatthepowerofthecircuithasbeenshutdownandallcapacitorshavebeendischargedfully.4.11.1Rotatetheprobesocketclockwisetospinouttheprobefromthemeter.4.11.2InserttheblacktestleadortestclipintheCOMjack.4.11.3Setthetransformswitchattherangeposition.4.11.4Putdownthe"FUNC."transformedatcontinuitytest.4.11.5Connecttheprobetipofthemetertoonesideofthetestedcircuitandprobetipofthetestlead(ortestclip)totheotherside.4.11.6Ifcontinuityexists(i.e.,resistancelessthanabout50Ω),built-inbuzzerwillsound.NOTE:-Iftheinputopencircuit(orthecircuitresistancemeasuredishigherthan200Ω),thenthefigure‘0L’willbedisplayed.4.12ACVOLTAGEDETECTWARNINGRiskofElectrocution.Whendetectingpayattentiontoavoidgettinganelectricshock.Beforeusingtocheckforvoltageinanoutlet,alwaystestthemeteronaknownlivecircuittoverifythattheACvoltagedetectfunctionofthemeterisworkingproperly.keepfingersbehindtheprobebarrierwhilemeasuring.measuredisunknownbeforehand,selectthehighestrange.4.6.2Whenmeasuring,atfirst,connecttothepublic(COM)testingline,thenconnecttheprobetipofthemetertothecircuitundertest.4.6.3Ifthebatteryvoltageislessthan2.4V,displaywillshow“”,thebatteryshouldbechangedatthistime.4.7DCVOLTAGEMEASURINGWARNINGRiskofElectrocution.Youcan’tinputthevoltagewhichishigherthan600VDC,it’spossibletoshowhighervoltage,butitmaydamagetheinnercircuitorcauseelectricalshock.Payattentiontoavoidgettinganelectricshockwhenmeasuringhighvoltage.4.7.1Rotatetheprobesocketclockwisetospinouttheprobefromthemeter.4.7.2InserttheblacktestleadortestclipintheCOMjack.4.7.3SetthetransformswitchattheVrangeposition.4.7.4Pressthe"FUNC."ButtontotransformtoDCmeasurement.Autorangeandmanualrangecanbetransformedbypressingthe“RANGE”button.4.7.5Connecttheprobetipofthemeterandprobetipofthetestlead(ortestclip)acrossthepowersourceorbeloadedonthetwosidesundermeasurement.4.7.6YoucangetareadingfromLCDdisplay.Thepolarityofthetestedterminalwhichthetipofthemeterconnectionwillbeindicated.NOTE:-Atthelittlevoltagerange,themeterwillshowunsteadyreadingwhentestleadshaven’treachthecircuit,it’snormalbecausethemeterisverysensitivity.Whenmetertouchthecircuit,youcangetthetruereading.-Atthemanualrangemode,whenonlythefigure‘OL’isdisplayed,itindicatesoverrangesituationandthehigherrangehastobeselected.-Atthemanualrangemode,whenthevaluescaletobemeasuredisunknownbeforehand,selecttherangetothehighestpositionandsetdowngradually.4.8MEASURINGACVOLTAGE4.8.1Rotatetheprobesocketclockwisetospinouttheprobefromthemeter.4.8.2InserttheblacktestleadortestclipintheCOMjack.4.8.3SetthetransformswitchattheVrangeposition.4.8.4Autorangeandmanualrangecanbetransformedbyputtingthe“RANGE”.4.8.5Connecttheprobetipofthemetertoonesideofthetestedcircuitandprobetipofthetestlead ... Thebatteryisnotsufficientforproperoperation.1.4MAINTENANCE1.4.1PleasedonotattempttoadjustorrepairthemeterbyremovingtherearcasewhilevoltageisbeingWARNINGBEEXTREMELYCAREFULINTHEUSEOFTHISMETER.Improperuseofthisdevicecanresultinelectricshockordestroyofthemeter.Followallsafeguardssuggestedinthismanualandthenormalsafetyprecautionsusedinworkingwithelectricalcircuits.Donotservicethisdeviceifyouarenotqualifiedtodoso.Toensuresafeoperation,andinordertoexploittothefullthefunctionalityofthemeter,pleasefollowthedirectionsinthissectioncarefully.ThismeterhasbeendesignedaccordingtoIEC-1010concerningelectronicmeasuringinstrumentswithanovervoltagecategoryCATⅢ600Vandpollution2.Followallsafetyandoperatinginstructionstoensurethatthemeterisusedsafelyandiskeptingoodoperatingcondition.Withproperuseandcare,thedigitalmeterwillgiveyouyearsofsatisfactoryservice.1.1PRELIMINARY1.1.1Whenusingthemeter,theusermustobserveallnormalsafetyrulesconcerning:-Protectionagainstthedangersofelectricalcurrent.-Protectionofthemeteragainstmisuse.1.1.2Whenthemeterisdelivered,checkthatithasnotbeendamagedintransit.1.1.3Whenpoorconditionunderharshpreservationorshippingconditionscaused,inspectandconfirmthismeterwithoutdelay.1.1.4Beforeusingtocheckforvoltage,alwaystestthemeteronaknownlivecircuittoverifythatthedetectfunctionofthemeterisworkingproperly.1.1.5Testleadortestclipmustbeingoodcondition.Beforeusingverifythattheinsulationontestleadortestclipisnotdamagedand/ortheleadswireisnotexposed.1.1.6Fullcompliancewithsafetystandardscanbeguaranteedonlyifusedwithtestleadssupplied.Ifnecessary,theymustbereplacedwiththesamemodelorsameelectricratings. User& apos;sManualSinoMeter ... applied.Atechnicianwhofullyunderstandsdangerinvolvedshouldonlycarryoutsuchactions.1.4.2Beforeopeningthebatterycoverorcaseofthemeter,alwaysdisconnectthetipofmeterandtheprobeofthetestlead(ortestclip)fromalltestedcircuits.1.4.3Toavoidthewrongreadingcausingelectricityattack,whenthemeterdisplays“”,youmustchangethebattery.1.4.4Donotuseabrasivesorsolventsonthemeter,useadampclothandmilddetergentonly.1.4.5AlwayssetthetransformswitchtotheOFFpositionwhenthemeterisnotinuse.1.4.6Ifthemeteristobestoredforalongperiodoftime,thebatteriesshouldberemovedtopreventdamagetotheunit.2.DESCRIPTION-ThismeterisaportableprofessionalmeasuringinstrumentwithhandsomeLCDeasilyreading.-Singleoperationofatransformswitchmakesmeasurementconvenient.Overloadprotectionandlowbatteryindicationareprovided,thismeterisidealforuseinthefields,workshop,school,hobbyandhomeapplications.-Non-contactdetectingisconvenienttotestthesocketortheleadwhetheriswithpowerornot.-Thismeterhasfunctionofautorangeandmanualrange.-Thismeterhasfunctionofautopoweroff.-Thismeteriswiththefunctionsofdataholdandmaximumvaluemeasureandhold.-Whenusing,itcanshowrangesengineeringunitenunciatorsmeasuringresults.2.1NAMESOFCOMPONENTS⑴Probe⑵RotatableProbeSocket⑶LEDIndicator⑷ProtectionRing⑸TransformSwitch⑹SensitivityAdjustKnob⑺FUNC.Button⑻RANGEButton⑼MAX.HButton⑽DATA-HButton⑾Panel⑿LCDDisplay⒀COMJack2.2COMPONENTSELUCIDATION-RANGEButtonThisbuttonisusedtotransformAutorangeormanualrange.-FUNC.ButtonThisbuttonisusedtotransformfunction.-DATA-HButtonThisButtonisusedtoholddata.-MAX.HButtonThisbuttonisusedtomeasureandholdthemaximumvalue.1.2DURINGUSE1.2.1Beforeusing,youmustselecttherightfunctionandrange.1.2.2Neverexceedtheprotectionlimitvaluesindicatedinspecificationsforeachrangeofmeasurement.1.2.3Whenthemeterislinkedtoameasurementcircuit,donottouchtheprobetipofthemeterandtestlead(ortestclip).1.2.4Atthemanualrange,whenthevaluescaletobemeasuredisunknownbeforehand,selectthehighestrange.1.2.5Donotmeasurevoltageifthevoltageontheterminalsexceeds600Vaboveearthground.1.2.6Alwaysbecarefulwhenworkingvoltagesabove60VDCor30VACrms,keepfingersbehindtheprobebarrierwhilemeasuring.1.2.7Neverconnectthemeterleadsacrossavoltagesourcewhilethetransformswitchisintheresistance,diodeorcontinuitymode.Doingsocandamagethemeter.1.2.8Neverperformresistance,diodeandcontinuitymeasurementsonlivecircuits.1.2.9ACVdetectingiswithoutcontact,theprobeshouldberevolvedinthemetercompletelywhenuse,anddonotcontacttheCOMjackwhichatthebackofthemeterwiththetestlead(ortestclip).1.2.10Beforerotatingthetransformswitchtochangethefunction,disconnectthetipofmeterandtheprobeofthetestlead(ortestclip)fromthecircuitundertest.1.2.11Neverusethemeterundertheconditionoftheexplosiveair,steamordirt.1.2.12Ifanyfaultsorabnormalitiesareobserved,themetercannotbeusedanymoreandithastobecheckedout.1.2.13Neverusethemeterunlesstherearcaseisinplaceandfastenedfully.1.2.14Pleasedonotstoreorusemeterinareasexposedtodirectsunlight,hightemperature,humidityorcondensation.1.3SYMBOLSImportantsafetyinformation,refertotheoperatingmanual.Doubleinsulation（Protectionclass((）.CAT(((Overvoltage(Installation)categoryIII,PollutionDegree2perIEC1010-1referstothelevelofImpulseWithstandVoltageprotectionprovided.ConformstoeuropeanuniondirectiveEarthgroundACAlternatingcurrentDCDirectcurrentACorDC(alternatingcurrentordirectcurrent)DiodeContinuitybuzzerM.HThemaximumvalueisbeingheld.D-HThisindicatesthatthedisplaydataisbeingheld.AUTOAutorange...
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... 12 CPU P1 P2 P3 P4 P1 P2 P4 P1 0 4 8 11 15 19 23 24 - 1 - PHẦN 2: HỆ ĐIỀU HÀNH (OPERATING SYSTEM) Chương 1: Tổng quan Hệ điều hành 1 Câu hỏi Tóm tắt chức năng của hệ điều hành ... Cung cấp các dịch vụ Cung cấp giao tiếp logic cho user sử dụng các dịch vụ Che giấu hoạt động và data hệ thống Biến đổi các yêu cầu của user thành các tín hiệu đk phần cứng 2 Câu hỏi Tóm ... thống tập tin (File System) . 4. Quản lý nhập xuất (I/O). 5. Quản lý thiết bị lưu trữ (Secondary-storage). 6. Quản lý mạng (Networking). 7. Hệ thống bảo vệ (Protection System) . 8. Hệ thông...
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