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某产品单位进价2元，售价6元。已知卖出10、20、30和40单位的概率分别为10%、30%、40%和20%。如卖不出去，则每单位亏损2元。经计算，各种进货量及销售量下的盈利矩阵如表16-4所示。 如...
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某商品现在的售价为每件60元每星期可卖出300件．市场调查反映每降价1元每星期可多卖出20件．已知商
10.00分某商场销售护眼灯现售价每盏30元每星期可卖出200盏市场调查发现如果调整价格每涨价1元
某体育用品商店购进一批乒乓球拍每件进价为10元售价为30元每星期可卖出40件商家决定降价促销根据市场
某商品的进价为每件40元售价为每件50元每个月可卖出210件.如果每件商品的售价每上涨1元则每个月少
某商品现在的售价为每件60元每星期可卖出300件．市场调查反映每降价1元每星期可多卖出20件．已知
某商品现在的售价为每件60元每星期可卖出300件.市场调查反映每降价1元每星期可多卖出20件.已知商
某产品成本20元成本率50%此产品的售价是
10元
20元
30元
40元
某商品现在的售价为每件60元每星期可卖出300件市场调查反映如调整价格每涨价1元每星期要少卖出10件
某商品的进价为每件40元.当售价为每件60元时每星期可卖出300件现需降价处理且经市场调查每降价1元
已知某种产品的进价为每件40元现在的售价为每件60元每星期可卖出300件.市场调查发现该产品每降价1
某种商品每件进价为20元调查表明在某段时间内若以每件x元20≤x≤30且x为整数出售可卖出30﹣x件
某商品现在的售价为每件60元每天可卖出300件．市场调查发现如果调整价格每降价1元每天可多卖出20
某种商品每件进价为20元调查表明在某段时间内若以每件x元20≤x≤30且x为整数出售可卖出30﹣x件
某种商品每件进价为20元调查表明在某段时间内若以每件x元20≤x≤30且x为整数出售可卖出30﹣x件
某商品现在的售价为每件60元每星期可卖出300件．市场调查反映每降价2元每星期可多卖出40件．已知
某商品现在的售价为每件60元每星期可卖出300件．市场调查反映每降价1元每星期可多卖出20件．已知
某产品成本20元成本率50%此产品的售价是元
10
20
30
40
某产品成本20元成本率50%此产品的售价是
10
20
30
40元
某商品现在的售价为每件60元每星期可卖出300件．市场调查反映每降价1元每星期可多卖出20件．已知
某商品现在的售价为每件60元每星期可卖出300件市场调查反映每降价1元每星期可多卖出20件．已知商品
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AnIntranetis66theapplicationofInternettechnologywithinaninternalorclosedusergroup.Intranetsarecompany67anddonothavea68connectiontotheInternet.UsedproperlyanIntranetishighlyeffectivecorporatetoolcapableofregularly69informationtoempowertheworkforcewiththeinformationneededtoperformtheirroles.UsedinthiswayanIntranetrepresentsasteptowardsthe70office. 67是
MostIPlayer-basedproxymechanismssuchasnetworkaddresstranslationNATonlysupportuni-directionalproxyfromtheinternalnetworktoexternalnetworktheInternet.Theproxyestablishesthecommunicationchannelby86IPaddresses.TheIPaddressesmustbe87.Theseproxymechanismspreventapplicationsthatmustestablishreturndatachannelsfromestablishingtheirdatachannelssuchasmultimediaapplications.IPlayer-basedproxymechanismsneedadditionalsoftware88foreachapplicationthatuses89channels.SOCKSidentifiescommunicationtargetsthroughdomainnamesovercomingtherestrictionofusingprivateIPaddresses.SOCKScanusedomainnamestoestablishcommunicationbetweenseparateLANswith90IPaddresses. 88是
Onestudyconductedbyapsychologist121ofinterviewingworkersbeforeandaftertheinstallationofarobot.Therobotwasusedtocontrolamatchingprocessofstampingandassemblingmetalparts.Priortoinstallationmuchoftheworkdonebyskilledmachinists.Afterinstallationtherobotdidtheworkbuttheworkerscontrolledtherobotthroughtherobotthroughacontrolpanel.Theresultsofthestudyindicatedthattheworkerspraisedtherobot122eliminatingthephysicallaborandfatigue123themanualoperationbutcomplainedofmoreandcontinuedstress.Priortoinstallationoftherobottherewastimefortalkingorshortperiodsofrelaxationbetweenjobs.Nowhoweverbecauseofthespeedoftherobottherewasaneedforconstantscanningandmonitoringoftheoperation124performedbytherobothastheinstallationoftherobotcreatedabetterworkenvironmentHasthechangefromphysicallabortomentalstressresultedinanimproved125oflifeMuchadditionalresearchisnecessary. 123是
OneofthedifficultiesinbuildinganSQL-likequerylanguagefortheWebistheabsenceofadatabase131forthishugeheterogeneousrepositoryofinformation.HoweverifweareinterestedinHTMLdocumentsonlywecanconstructavirtualschemafromtheimplicitstructureofthesefiles.Thusatthehighestlevelof132everysuchdocumentisidentifiedbyitsUniformResourceLocatorURLanda133andatext.AlsoWebseversprovidesomeadditionalinformationsuchasthetypelengthandthelastmodificationdateofadocument.SofordataminingpurposeswecanconsiderthesetofallHTMLdocumentsasarelation: Documenturlrifletexttypelengthmodif Whereallthe134arecharacterstrings.Inthisframeworkanindividualdocumentisidentifiedwitha135inthisrelation.OfcourseifsomeoptionalinformationismissingfromtheHTMLdocumenttheassociatefieldswillbeleftblankbutthisisnotuncommoninanydatabase. 135是
MostIPlayer-basedproxymechanismssuchasnetworkaddresstranslationNATonlysupportuni-directionalproxyfromtheinternalnetworktoexternalnetworktheInternet.Theproxyestablishesthecommunicationchannelby86IPaddresses.TheIPaddressesmustbe87.Theseproxymechanismspreventapplicationsthatmustestablishreturndatachannelsfromestablishingtheirdatachannelssuchasmultimediaapplications.IPlayer-basedproxymechanismsneedadditionalsoftware88foreachapplicationthatuses89channels.SOCKSidentifiescommunicationtargetsthroughdomainnamesovercomingtherestrictionofusingprivateIPaddresses.SOCKScanusedomainnamestoestablishcommunicationbetweenseparateLANswith90IPaddresses. 90是
MostIPlayer-basedproxymechanismssuchasnetworkaddresstranslationNATonlysupportuni-directionalproxyfromtheinternalnetworktoexternalnetworktheInternet.Theproxyestablishesthecommunicationchannelby86IPaddresses.TheIPaddressesmustbe87.Theseproxymechanismspreventapplicationsthatmustestablishreturndatachannelsfromestablishingtheirdatachannelssuchasmultimediaapplications.IPlayer-basedproxymechanismsneedadditionalsoftware88foreachapplicationthatuses89channels.SOCKSidentifiescommunicationtargetsthroughdomainnamesovercomingtherestrictionofusingprivateIPaddresses.SOCKScanusedomainnamestoestablishcommunicationbetweenseparateLANswith90IPaddresses. 86是
AsynchronousTransferModeATMisa16thatpromisestochangethefabricoflocalandwideareacommunications. ThekeyadvantageofATMisthecapabilitytomovevoicedatagraphicsand17atspeedsofupto2gigabitspersecond. AnATMswitchallowsyoutocreatea18networkthatiscompletelyindependentfromthe19configurationofthenetwork.ATMusesa20calledcellswitchingtoconvertdataintofixedlengthcellsof53byteseachsotheycanbeswitchedveryquicklyandefficiently. 17是
PriortotheUMLtherewasnoclearleading111language.Usershadtochoosefromamongmanysimilarmodelinglanguageswithminordifferencesinoverall112power.Mostofthemodelinglanguagessharedasetofcommonlyacceptedconceptsthatareexpressedslightlydifferentlyinvariouslanguages.Thislackof113discouragednewusersfromenteringtheOOmarketandfromdoingOOmodelingwithoutgreatlyexpandingthepowerofmodeling.Userslongedfortheindustrytoadoptoneoraveryfewbroadlysupportedmodelinglanguagessuitablefor114usage. SomevendorswerediscouragedfromenteringtheOOmodelingareabecauseoftheneedtosupportmanysimilarbutslightlydifferentmodelinglanguages.Inparticularthesupplyofadd-ontoolshasbeendepressedbecausesmallvendorscannotaffordtosupportmanydifferentformatsfrommanydifferent115modelingtools.ItisimportanttotheentireO0industrytoencouragebroadlybasedtoolsandvendorsaswellasnicheproductsthatcatertotheneedsofspecializedgroups. 113是
AnIntranetis66theapplicationofInternettechnologywithinaninternalorclosedusergroup.Intranetsarecompany67anddonothavea68connectiontotheInternet.UsedproperlyanIntranetishighlyeffectivecorporatetoolcapableofregularly69informationtoempowertheworkforcewiththeinformationneededtoperformtheirroles.UsedinthiswayanIntranetrepresentsasteptowardsthe70office. 69是
Onestudyconductedbyapsychologist121ofinterviewingworkersbeforeandaftertheinstallationofarobot.Therobotwasusedtocontrolamatchingprocessofstampingandassemblingmetalparts.Priortoinstallationmuchoftheworkdonebyskilledmachinists.Afterinstallationtherobotdidtheworkbuttheworkerscontrolledtherobotthroughtherobotthroughacontrolpanel.Theresultsofthestudyindicatedthattheworkerspraisedtherobot122eliminatingthephysicallaborandfatigue123themanualoperationbutcomplainedofmoreandcontinuedstress.Priortoinstallationoftherobottherewastimefortalkingorshortperiodsofrelaxationbetweenjobs.Nowhoweverbecauseofthespeedoftherobottherewasaneedforconstantscanningandmonitoringoftheoperation124performedbytherobothastheinstallationoftherobotcreatedabetterworkenvironmentHasthechangefromphysicallabortomentalstressresultedinanimproved125oflifeMuchadditionalresearchisnecessary. 121是
PriortotheUMLtherewasnoclearleading111language.Usershadtochoosefromamongmanysimilarmodelinglanguageswithminordifferencesinoverall112power.Mostofthemodelinglanguagessharedasetofcommonlyacceptedconceptsthatareexpressedslightlydifferentlyinvariouslanguages.Thislackof113discouragednewusersfromenteringtheOOmarketandfromdoingOOmodelingwithoutgreatlyexpandingthepowerofmodeling.Userslongedfortheindustrytoadoptoneoraveryfewbroadlysupportedmodelinglanguagessuitablefor114usage. SomevendorswerediscouragedfromenteringtheOOmodelingareabecauseoftheneedtosupportmanysimilarbutslightlydifferentmodelinglanguages.Inparticularthesupplyofadd-ontoolshasbeendepressedbecausesmallvendorscannotaffordtosupportmanydifferentformatsfrommanydifferent115modelingtools.ItisimportanttotheentireO0industrytoencouragebroadlybasedtoolsandvendorsaswellasnicheproductsthatcatertotheneedsofspecializedgroups. 115是
TheprimaryadvantagesofaClient/Serversystemarisefromsplittingtheprocessingbetweentheclientsystemandthedatabaseserver.Sincethebulkofthedatabaseprocessingisdoneontheback-endthespeedoftheDBMSisn’ttiedtothespeedofthe31. ThemajordisadvantageofClient/Serversystemistheincreasedcostof32andsupportpersonnelwhomaintainthedatabaseserver.Thereisalsotheissueof33withsomanypartscomprisingtheentireC/Ssystem;Murphy’sLawcankickin-themorepiecesthatcomposethesystemthemorepiecesthatcanfail.It’salsohardertotrackdownproblemswhenthesystem34.Anditcaninitiallytakelongertogetallthecomponentssetupandworkingtogether.Allthisiscompoundedbythegenerallackofexperienceandexpertiseofpotentialsupportpersonnelandprogrammersduetotherelativenewnessofthetechnology.AsC/Ssystembecomemorecommonthisproblemshouldabate. ThereforetheC/Ssystemismore35. 34是
Tocompeteintoday’sfast-pacedcompetitiveenvironmentorganizationsareincreasinglyallowingcontractorspartnersvisitorsandgueststoaccesstheirinternalenterprisenetworks.Theseusersmayconnecttothenetworkthroughwiredportsinconferenceroomsorofficesorviawirelessaccesspoints.InallowingthisopenaccessforthirdpartiesLANsbecome171.Thirdpartiescanintroduceriskinavarietyofwaysfromconnectingwithaninfectedlaptoptounauthorizedaccessofnetworkresourcesto172activity.Formanyorganizationshowevertheoperationalcomplexityandcoststoensuresafethirdpartynetworkaccesshavebeenprohibitive.Fifty-twopercentofsurveyedCISOsstatethattheycurrentlyuseamoatandcastle’ssecurityapproachandadmitthatdefensesinsidetheperimeterareweak.Threatsfrominternalusersarealsoincreasinglyacauseforsecurityconcerns.Employeeswithmaliciousintentcanlaunch173ofserviceattacksorsteal174informationbysnoopingthenetwork.Astheyaccessthecorporatenetworkmobileandremoteusersinadvertentlycaninfectthenetworkwith175andwormsacquiredfromunprotectedpublicnetworks.Hackersmasqueradingasinternaluserscantakeadvantageofweakinternalsecuritytogainaccesstoconfidentialinformation. 171是
astuteserviceprovidersrealizethatthecontinuedsupportoflegacyX.25andasynchronousnetworkelementusingseparateoperationsnetworkiscost141.Forexamplethemaintenanceofmultiplenetworkscanrequireadditionalstaff.Oftenthisstaffmustbetrainedonmultiplevendortechnologiessometimesrequiringparallelgroupsspecializingineach142.Henceadditionalmaintenanceproceduresmustbemaintainedandadministrativerecordsare143.Theduplicationoftransportfacilitiestocarry144networktrafficisaninefficientuseofresources.Andnotsurprisinglymoretechnologiesinstalledinacentralofficemeansthenecessityformorephysicalspaceandanincreaseinpowerconnectionsandpowerconsumptionmigrationofthese145networkelementstoIP-basedDCnsisalogicalstrategy. 144是
Acrossawidevarietyoffieldsdataarebeingcollectedandaccumulatedatadramaticpace.Thereisanurgentneedforanewgenerationofcomputationaltheoriesandtoolstoassisthumansin96usefulinformationknowledgefromtherapidlygrowing97ofdigitaldata.ThesetheoriesandtoolsarethesubjectoftheemergingfieldofknowledgediscoveryindatabaseKDD.AtanabstractleveltheKDDfieldisconcernedwiththedevelopmentofmethodsandtechniquesformaking98ofdata.ThebasicproblemaddressedbytheKDDprocessisoneofmappinglow-leveldatawhicharetypicallytoovoluminoustounderstandanddigesteasilyintootherformsthatmightbemore99forexampleashortreportmore100forexampleadescriptiveapproximationormodeloftheprocessthatgeneratedthedataormoreusefulforexampleapredictivemodelforestimatingthevalueoffuturecases.Atthecoreoftheprocessistheapplicationofspecificdata-miningmethodsforpatterndiscoveryandextraction. 97是
VRMLisa151for3DmultimediaandsharedvirtualworldsontheWWW.IncomparisontoHTMLVRMLaddsthenextlevelofinteractionstructuredgraphicsandextra152zandtimetothepresentationofdocuments.TheapplicationsofVRMLare153rangingfromsimplebusinessgraphicstoentertainingWWWpagegraphicsmanufacturingscientificentertainmentandeducationalapplicationsand3Dsharedvirtualworldsandcommunities. X3DisthenameunderwhichthedevelopmentofVRMLiscontinued.X3DisbasedonXMLandisbackwards154withVRML.FurthermoreitiscomponentizedprofiledandextensiblewhichmakesitpossibletouseX3Dinverydifferent155fromhigh-endvisualizationstolightweightapplications. 152是
OneofthedifficultiesinbuildinganSQL-likequerylanguagefortheWebistheabsenceofadatabase131forthishugeheterogeneousrepositoryofinformation.HoweverifweareinterestedinHTMLdocumentsonlywecanconstructavirtualschemafromtheimplicitstructureofthesefiles.Thusatthehighestlevelof132everysuchdocumentisidentifiedbyitsUniformResourceLocatorURLanda133andatext.AlsoWebseversprovidesomeadditionalinformationsuchasthetypelengthandthelastmodificationdateofadocument.SofordataminingpurposeswecanconsiderthesetofallHTMLdocumentsasarelation: Documenturlrifletexttypelengthmodif Whereallthe134arecharacterstrings.Inthisframeworkanindividualdocumentisidentifiedwitha135inthisrelation.OfcourseifsomeoptionalinformationismissingfromtheHTMLdocumenttheassociatefieldswillbeleftblankbutthisisnotuncommoninanydatabase. 133是
Today’sresponsetothedataaccessdilemmaeschewsthetraditionalarchivalapproachinfavorofemergingstandardsforwhataredescribedasthedocumentsofthefuture:compounddocuments.Productusersanddevelopershopethelateststandardseffort--suchasOpenDocandMicrosoftCorp.’sObjectLinkingandEmbeddingOLEwill26dataaccessibility. OpenDocisastandardsgroup27acommonlookandfeelthroughoutdocumentseventhoughdifferentapplicationsareused. OLEtechnologiesallowMicrosoftto28itsvarioussoftwareproducts.MicrosoftcreatesgovernsanddistributestheOLEcapabilitywhichiswhatmost29itfromtheopenOpenDocapproach.Thususerscanassemble30ofvaryingapplicationtocreatecompounddocuments.WithOLEuserscanforexampleembedanExcelchartinaMicrosoftwordreport. 26是
Tocompeteintoday’sfast-pacedcompetitiveenvironmentorganizationsareincreasinglyallowingcontractorspartnersvisitorsandgueststoaccesstheirinternalenterprisenetworks.Theseusersmayconnecttothenetworkthroughwiredportsinconferenceroomsorofficesorviawirelessaccesspoints.InallowingthisopenaccessforthirdpartiesLANsbecome171.Thirdpartiescanintroduceriskinavarietyofwaysfromconnectingwithaninfectedlaptoptounauthorizedaccessofnetworkresourcesto172activity.Formanyorganizationshowevertheoperationalcomplexityandcoststoensuresafethirdpartynetworkaccesshavebeenprohibitive.Fifty-twopercentofsurveyedCISOsstatethattheycurrentlyuseamoatandcastle’ssecurityapproachandadmitthatdefensesinsidetheperimeterareweak.Threatsfrominternalusersarealsoincreasinglyacauseforsecurityconcerns.Employeeswithmaliciousintentcanlaunch173ofserviceattacksorsteal174informationbysnoopingthenetwork.Astheyaccessthecorporatenetworkmobileandremoteusersinadvertentlycaninfectthenetworkwith175andwormsacquiredfromunprotectedpublicnetworks.Hackersmasqueradingasinternaluserscantakeadvantageofweakinternalsecuritytogainaccesstoconfidentialinformation. 175是
Today’sresponsetothedataaccessdilemmaeschewsthetraditionalarchivalapproachinfavorofemergingstandardsforwhataredescribedasthedocumentsofthefuture:compounddocuments.Productusersanddevelopershopethelateststandardseffort--suchasOpenDocandMicrosoftCorp.’sObjectLinkingandEmbeddingOLEwill26dataaccessibility. OpenDocisastandardsgroup27acommonlookandfeelthroughoutdocumentseventhoughdifferentapplicationsareused. OLEtechnologiesallowMicrosoftto28itsvarioussoftwareproducts.MicrosoftcreatesgovernsanddistributestheOLEcapabilitywhichiswhatmost29itfromtheopenOpenDocapproach.Thususerscanassemble30ofvaryingapplicationtocreatecompounddocuments.WithOLEuserscanforexampleembedanExcelchartinaMicrosoftwordreport. 30是
TheprimaryadvantagesofaClient/Serversystemarisefromsplittingtheprocessingbetweentheclientsystemandthedatabaseserver.Sincethebulkofthedatabaseprocessingisdoneontheback-endthespeedoftheDBMSisn’ttiedtothespeedofthe31. ThemajordisadvantageofClient/Serversystemistheincreasedcostof32andsupportpersonnelwhomaintainthedatabaseserver.Thereisalsotheissueof33withsomanypartscomprisingtheentireC/Ssystem;Murphy’sLawcankickin-themorepiecesthatcomposethesystemthemorepiecesthatcanfail.It’salsohardertotrackdownproblemswhenthesystem34.Anditcaninitiallytakelongertogetallthecomponentssetupandworkingtogether.Allthisiscompoundedbythegenerallackofexperienceandexpertiseofpotentialsupportpersonnelandprogrammersduetotherelativenewnessofthetechnology.AsC/Ssystembecomemorecommonthisproblemshouldabate. ThereforetheC/Ssystemismore35. 32是
astuteserviceprovidersrealizethatthecontinuedsupportoflegacyX.25andasynchronousnetworkelementusingseparateoperationsnetworkiscost141.Forexamplethemaintenanceofmultiplenetworkscanrequireadditionalstaff.Oftenthisstaffmustbetrainedonmultiplevendortechnologiessometimesrequiringparallelgroupsspecializingineach142.Henceadditionalmaintenanceproceduresmustbemaintainedandadministrativerecordsare143.Theduplicationoftransportfacilitiestocarry144networktrafficisaninefficientuseofresources.Andnotsurprisinglymoretechnologiesinstalledinacentralofficemeansthenecessityformorephysicalspaceandanincreaseinpowerconnectionsandpowerconsumptionmigrationofthese145networkelementstoIP-basedDCnsisalogicalstrategy. 142是
VRMLisa151for3DmultimediaandsharedvirtualworldsontheWWW.IncomparisontoHTMLVRMLaddsthenextlevelofinteractionstructuredgraphicsandextra152zandtimetothepresentationofdocuments.TheapplicationsofVRMLare153rangingfromsimplebusinessgraphicstoentertainingWWWpagegraphicsmanufacturingscientificentertainmentandeducationalapplicationsand3Dsharedvirtualworldsandcommunities. X3DisthenameunderwhichthedevelopmentofVRMLiscontinued.X3DisbasedonXMLandisbackwards154withVRML.FurthermoreitiscomponentizedprofiledandextensiblewhichmakesitpossibletouseX3Dinverydifferent155fromhigh-endvisualizationstolightweightapplications. 154是
AsynchronousTransferModeATMisa16thatpromisestochangethefabricoflocalandwideareacommunications. ThekeyadvantageofATMisthecapabilitytomovevoicedatagraphicsand17atspeedsofupto2gigabitspersecond. AnATMswitchallowsyoutocreatea18networkthatiscompletelyindependentfromthe19configurationofthenetwork.ATMusesa20calledcellswitchingtoconvertdataintofixedlengthcellsof53byteseachsotheycanbeswitchedveryquicklyandefficiently. 19是
OneofthedifficultiesinbuildinganSQL-likequerylanguagefortheWebistheabsenceofadatabase131forthishugeheterogeneousrepositoryofinformation.HoweverifweareinterestedinHTMLdocumentsonlywecanconstructavirtualschemafromtheimplicitstructureofthesefiles.Thusatthehighestlevelof132everysuchdocumentisidentifiedbyitsUniformResourceLocatorURLanda133andatext.AlsoWebseversprovidesomeadditionalinformationsuchasthetypelengthandthelastmodificationdateofadocument.SofordataminingpurposeswecanconsiderthesetofallHTMLdocumentsasarelation: Documenturlrifletexttypelengthmodif Whereallthe134arecharacterstrings.Inthisframeworkanindividualdocumentisidentifiedwitha135inthisrelation.OfcourseifsomeoptionalinformationismissingfromtheHTMLdocumenttheassociatefieldswillbeleftblankbutthisisnotuncommoninanydatabase. 131是
Today’sresponsetothedataaccessdilemmaeschewsthetraditionalarchivalapproachinfavorofemergingstandardsforwhataredescribedasthedocumentsofthefuture:compounddocuments.Productusersanddevelopershopethelateststandardseffort--suchasOpenDocandMicrosoftCorp.’sObjectLinkingandEmbeddingOLEwill26dataaccessibility. OpenDocisastandardsgroup27acommonlookandfeelthroughoutdocumentseventhoughdifferentapplicationsareused. OLEtechnologiesallowMicrosoftto28itsvarioussoftwareproducts.MicrosoftcreatesgovernsanddistributestheOLEcapabilitywhichiswhatmost29itfromtheopenOpenDocapproach.Thususerscanassemble30ofvaryingapplicationtocreatecompounddocuments.WithOLEuserscanforexampleembedanExcelchartinaMicrosoftwordreport. 28是
Acrossawidevarietyoffieldsdataarebeingcollectedandaccumulatedatadramaticpace.Thereisanurgentneedforanewgenerationofcomputationaltheoriesandtoolstoassisthumansin96usefulinformationknowledgefromtherapidlygrowing97ofdigitaldata.ThesetheoriesandtoolsarethesubjectoftheemergingfieldofknowledgediscoveryindatabaseKDD.AtanabstractleveltheKDDfieldisconcernedwiththedevelopmentofmethodsandtechniquesformaking98ofdata.ThebasicproblemaddressedbytheKDDprocessisoneofmappinglow-leveldatawhicharetypicallytoovoluminoustounderstandanddigesteasilyintootherformsthatmightbemore99forexampleashortreportmore100forexampleadescriptiveapproximationormodeloftheprocessthatgeneratedthedataormoreusefulforexampleapredictivemodelforestimatingthevalueoffuturecases.Atthecoreoftheprocessistheapplicationofspecificdata-miningmethodsforpatterndiscoveryandextraction. 99是
Onestudyconductedbyapsychologist121ofinterviewingworkersbeforeandaftertheinstallationofarobot.Therobotwasusedtocontrolamatchingprocessofstampingandassemblingmetalparts.Priortoinstallationmuchoftheworkdonebyskilledmachinists.Afterinstallationtherobotdidtheworkbuttheworkerscontrolledtherobotthroughtherobotthroughacontrolpanel.Theresultsofthestudyindicatedthattheworkerspraisedtherobot122eliminatingthephysicallaborandfatigue123themanualoperationbutcomplainedofmoreandcontinuedstress.Priortoinstallationoftherobottherewastimefortalkingorshortperiodsofrelaxationbetweenjobs.Nowhoweverbecauseofthespeedoftherobottherewasaneedforconstantscanningandmonitoringoftheoperation124performedbytherobothastheinstallationoftherobotcreatedabetterworkenvironmentHasthechangefromphysicallabortomentalstressresultedinanimproved125oflifeMuchadditionalresearchisnecessary. 125是
Tocompeteintoday’sfast-pacedcompetitiveenvironmentorganizationsareincreasinglyallowingcontractorspartnersvisitorsandgueststoaccesstheirinternalenterprisenetworks.Theseusersmayconnecttothenetworkthroughwiredportsinconferenceroomsorofficesorviawirelessaccesspoints.InallowingthisopenaccessforthirdpartiesLANsbecome171.Thirdpartiescanintroduceriskinavarietyofwaysfromconnectingwithaninfectedlaptoptounauthorizedaccessofnetworkresourcesto172activity.Formanyorganizationshowevertheoperationalcomplexityandcoststoensuresafethirdpartynetworkaccesshavebeenprohibitive.Fifty-twopercentofsurveyedCISOsstatethattheycurrentlyuseamoatandcastle’ssecurityapproachandadmitthatdefensesinsidetheperimeterareweak.Threatsfrominternalusersarealsoincreasinglyacauseforsecurityconcerns.Employeeswithmaliciousintentcanlaunch173ofserviceattacksorsteal174informationbysnoopingthenetwork.Astheyaccessthecorporatenetworkmobileandremoteusersinadvertentlycaninfectthenetworkwith175andwormsacquiredfromunprotectedpublicnetworks.Hackersmasqueradingasinternaluserscantakeadvantageofweakinternalsecuritytogainaccesstoconfidentialinformation. 173是
PriortotheUMLtherewasnoclearleading111language.Usershadtochoosefromamongmanysimilarmodelinglanguageswithminordifferencesinoverall112power.Mostofthemodelinglanguagessharedasetofcommonlyacceptedconceptsthatareexpressedslightlydifferentlyinvariouslanguages.Thislackof113discouragednewusersfromenteringtheOOmarketandfromdoingOOmodelingwithoutgreatlyexpandingthepowerofmodeling.Userslongedfortheindustrytoadoptoneoraveryfewbroadlysupportedmodelinglanguagessuitablefor114usage. SomevendorswerediscouragedfromenteringtheOOmodelingareabecauseoftheneedtosupportmanysimilarbutslightlydifferentmodelinglanguages.Inparticularthesupplyofadd-ontoolshasbeendepressedbecausesmallvendorscannotaffordtosupportmanydifferentformatsfrommanydifferent115modelingtools.ItisimportanttotheentireO0industrytoencouragebroadlybasedtoolsandvendorsaswellasnicheproductsthatcatertotheneedsofspecializedgroups. 111是
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