简介：Atacomputersoftwarecourse,theparticipantsweregivenanawkwardquestiontoanswer:“Ifyouhadjustboardedanairlineranddiscoveredthatyourteamofprogrammershadbeenresponsiblefortheflightcontrolsoftware,howmanyofyouwoulddisembarkimmediately?”

简介：绝对值的几何意义：一个数离开原点的距离．

简介：bythetheoryofsciencetodealwithbetweenpersonandearth.thenaturesystem——ofthenaturalgroundcontainvital"fairy"——intheprocessofcityturnencounterthoroughlydestroyoragreatmountof.avoidedinthepastChinesecitydevelopmentsofmorethan20inthelastyears,butcanhelpmankindthelivegettingbetter.Thiskindofpersonthecognitionoftheearthrelationisendshouldnowforakindofnewtheethicsofearth.Lovespassionatelywithrespectthenatureprocesswiththestructureandformispeoplewhoethicalfoundationinthiskindofnewearth,howtoletcityandnaturesystemsymbiosisandmakemoderncitythepersoncanfeelnaturalprocess

简介：Inthispapertheconceptofabsoluteobservabilityofnonlinearcontrolsystemsisadvanced.Differentfromthelineartime-invariantversion,therearedifferentdefinitionsofabsoluteobservabilityfornonlinearcontrolsystems.Twoalgorithmsformaximalabsolutelyobservablesubsystemsaregiven.Correspondingly,therearetworelevantnormalforms.Therelationswiththelargestcontrolledinvariantdistributioncontainedinkerdh,zerodynamicsetc.,arediscussedfromtheviewpointofmaximalabsoluteobservabilities.

简介：Inthispaper,byprovidingsomedifferentconditionsrespecttoanotherworks,weshallpresenttworesultsonabsoluteretractivityofsomesetsrelatedtosomemultifunctionsoftheformF:X×X→Pb,cl(X),oncompletemetricspaces.

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简介：Thesecurityofcivilengineeringisanimportanttaskduetotheeconomic,socialandenvironmentalsignificance.Comparedwithconventionalsensors,theopticalfibersensorshavetheiruniquecharacteristics.Beingdurable,stableandinsensitivetoexternalperturbations,theyareparticularinterestingforthelong-termmonitoringofcivilstructures.Focusisonabsolutemeasurementopticalfibersensors,whichareemergingfromthemonitoringlargestructural,includingSOFOsystem,F-Popticalfibersensors,andfiberBragggratingsensors.Theprinciple,characteristicandapplicationofthesethreekindsofopticalfibersensorsaredescribedtogetherwiththeirfutureprospects.

简介：Theoff-planepropagationofelectromagnetic(EM)wavesinatwo-dimensional(2D)graphitephotoniccrystalstructurewasstudiedusingtransfermatrixmethod.Transmissionspectracalculationsindicatethatsucha2Dstructurehasacommonbandgapfrom0.202to0.2035c/aforbothHandEpolarizationsandforalloff-planeanglesform0°upto90°.Thepresenceofsuchanabsolutebandgapimpliesthat2Dgraphitephotoniccrystal,whichismucheasierandmorefeasibletofabricate,canexhibitsomepropertiesofathree-dimensional(3D)photoniccrystal.

简介：Microcalorimetrywasdevelopedtodeterminethermalconductivities(λ)ofthermalinsulatorswithhollowcylindricalshapes,Aspecialdeviceofspecimentwithresistancethreadswrappedonitssurfaceandelectricheaterplacedinitsholewasdesignedtomeettheneedsofdeterminingλwithoutusingstandardsubstancestocalibratetheinstrument.Aformulaforcalculatingthevalueofλwasderived.Byheatingintheholeandonthesurfaceofthespecimenrespectively,thevaluesofλcanbeobtainedconvenientlybythistechnique.Themethodwastestedwithteflon,plexiglass,quartzglassandp[olyethylene.Theexperimentalvaluesofλforthefoursubstancesagreewellwiththeliteraturesones.Erroranalysiswasalsomadeontheexperimentaldata.Itwasfounrthatthemainfactorsaffectingvaluesofλare:(1)Theerroreofdeterminingthevaluesofheatcumulatedinspecimenandmaterialsinthespacearounditand(2)theerroreofdeterminingthevaluesofinnerandouterradiiofcylindricalspecimen.λ

简介：ThefirstAsia-PacificComparisonofAbsoluteGravimeters(APMP.M.G-K1)wasorganizedbytheNationalInstituteofMetrology(NIM)ofChinafromDecember21,2015toMarch25,2016inChangping,Beijing.Ourcompactcoldatomgravimeter(CCAG)wastransportedfromHangzhoutoBeijingwithalongdistanceofabout1200kmtoparticipateinthiscomparison.TheCCAGistheonlyone,tothebestofourknowledge,thatisbasedontheprincipleofatominterferometryamongalltheinstruments.Absolutegravityintheindicatedthreetestsiteshasbeenmeasuredasrequestedbytheorganizer.ThesensitivityofourCCAGisestimatedtobe90μGal∕Hzp,evenwhenthemeasurementsarecarriedoutwithoutanyvibrationisolation.Besides,theaccuracyofthisgravimeterhasbeenevaluatedtobeabout19μGalbyconsideringthesignificantsystemerrors.Ourresultsshowagoodagreementwiththegivenreferencevalue.

简介：Inthepresentpaper,theabsolutestabilityofgeneralLuriediscretenonlinearcontrolsystemshasbeendiscussedbyLyapunovfunctionapproach,AsufficientconditionofabsolutestabvilityforthegeneralLuriediscretenonlinearcontrolsystemsisderived,andSomenecessaryandsufficientconditionsareobtainedinspecialcases.Meanwhile,wegiveasimpleexampletoillustratetheeffectivenessoftheresults.

简介：这份报纸为感动一般水准(PARMA)模特儿的原因、可颠倒的周期的autoregressive调查加权的最不绝对的偏差评估者(WLADE)。评估者的Asymptotic规度在一个部分时刻条件下面被导出。模拟研究被给估计建议WLADE的表演。

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简介：ＡＢＳＯＬＵＴＥＳＴＡＢＩＬＩＴＹＯＦＣＯＮＴＲＯＬＳＹＳＴＥＭＷＩＴＨＭＵＬＴＩ－ＮＯＮＬＩＮＥＡＲＦＥＥＤＢＡＣＫＴＥＲＭＳ￥（廖晓昕，王晓君，舒卫华，吴卫华）ＬｉａｏＸｉａｏｘｉｎ；ＷａｎｇＸｉａｏｊｕｎ（Ｄｅｐｔ．ｏｆＭａｔｈｅｍａｔｉｃｓ，...

简介：Thispaperdevelopsgoalprogrammingalgorithmtosolveatypeofleastabsolutevalue(LAV)problem.Firstly,wesimplifythesimplexalgorithmbyprovingtheexistenceofsolutionsoftheproblem.Then,wepresentagoalprogrammingalgorithmonthebasisoftheoriginaltechniques.TheoreticalanalysisandnumericalresultsindicatethatthenewmethodcontainsalowernumberofdeviationvariablesandconsumeslesscomputationaltimeascomparedtocurrentLAVmethods.

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简介：高保真ICC．专色打印．200IPi真网点，支持爱普照生PR02100，COLOR4000．惠普120等多款打印机都足够吸专业人士的眼球!

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简介：ThispaperdealswiththeproblemoftheabsolutestabilityforgeneralneutraltypeLurieindirectcontrolsystemsbyLyapunovmethodandlinearmatrixinequality(LMI)technique.Delay-dependentsufficientconditionsfortheabsolutestabilityarederivedandexpressedasthefeasibilityproblemofLMI,whichcanbeeasilysolvedbyMatlabToolbox.Finally,someexamplesareprovidetodemonstratetheeffectivenessofproposedmethod.