简介：Timereversalisappliedtotheunderwaterspreadingspectrumcodingcommunication.Onthebaseofanalyzingthefocusingcharacteristicsofthetimereversalinunderwaterwaveguide,thetimereversalisstudiedtoovercomethewavedistortionoftheencodedsignalcausedbythemulti-patheffect.TheexperimentresearchforunderwatercodingcommunicationiscarriedoutinalabwatertankandthecorrespondingtheoreticalanalysisisalsoconductedbyBinaryPhaseShiftKeying(BPSK)encodingandBarkercodewith7chipsforthespreadingspectrumsignal.Theresultsshowthatthetimereversalcanimprovethefocusinggainandincreasetheratiooftheprincipaltothesecondlobeofthecodingsignal,andcandecreasethebiterrorrateandincreasethecommunicationdistance.

简介：Split-phase current differential protection has excellent capability of fault phase selection no matter whether the fault occurs on the same line or cross over lines.,under-reaching distance protection will not overreach when fault occurs at the end of line or the beginning of the next line after series capacitor.,The whole protection scheme for double-circuit lines on the same tower consists of split-phase current differential protection or split-phase composite distance carrier protection and zero-sequence directional comparison protection as main protection

简介：WiththedevelopmentofWeb2.0,moreandmorepeoplechoosetousetheInternettoexpresstheiropinions.Allthisopinionstogetherintoanewformtextwhichcontainsalotofvaluableemotionalinformation,thisiswhyhowtodealwiththesetextsandanalysistheemotionalinformationissignificantforus.Wegetthreemaintasksofsentimentanalysis,includingsentimentextraction,sentimentclassification,sentimentapplicationandsummarization.Inthispaper,basedontheRsoftware,weintroducedthestepsofsentimentanalysisindetail.Finally,wecollectthemoviereviewsfromtheInternet,anduseRsoftwaretodosentimentanalysisinordertojudgetheemotionaltendencyofthetext.

简介：Auditorymodelhasbeenappliedtoseveralaspectsofspeechsignalprocessingfield,andappearstobeeffectiveinperformance.Thispaperpresentstheinversetransformofeachstageofonewidelyusedauditorymodel.Firstofallitisnecessarytoinvertcorrelogramandreconstructphaseinformationbyrepetitiousiterationsinordertogetauditory-nervefiringrate.ThenextstepistoobtainthenegativepartsofthesignalviathereverseprocessoftheHWR(HalfWaveRectification).Finallythefunctionsofinnerhaircell/synapsemodelandGammatonefiltershavetobeinverted.Thusthewholeauditorymodelinversionhasbeenachieved.Anapplicationofnoisyspeechenhancementbasedonauditorymodelinversionalgorithmisproposed.Manyexperimentsshowthatthismethodiseffectiveinreducingnoise.EspeciallywhenSNRofnoisyspeechislowitismoreeffectivethanothermethods.Thusthisauditorymodelinversionmethodgiveninthispaperisapplicabletospeechenhancementfield.

简介：Oursocietyisdevelopingrapidly,inasocietylikethis,theentrepreneursandproductmanufacturerstendtousewhitespaceorpicturesmassivelyinsteadoftextinformationintheiradvertisementsorleaflets.Thisphenomenonistotallydifferentfromitwasintheyearspast,whenhighpricesandoutdatedtechnologieslimitedthecapabilityofprintingindustry,andforcedthemtoputmoretextinformationintheirpublicationsorprintedmaterials.

简介：ThenewWIODdatabaseallowsforimprovedempiricalanalysisonawiderangeofimportantenvironmentalresearchquestions.InthispaperwedemonstratethescientificpoweroftheWIODdatabaseandanalyzeveryurgentpolicyquestionsontheimpactsofinternationaltradeandstructuralchangeontheenvironment.Weapplyrecenteconometricapproachestoshowtheimpactofinternationaltradeontheenvironmentviaitsdifferentchannelsasforinstancetoincreasewelfareandpotentiallyaffectenvironmentalregulationaswellascountries’sector.Thisapproachhasbecomeknownastheeconometricstructuraldecompositionmethod.Inadditiontotheseguidelinesbytheliterature,aneconometricpaneldataapproachisofferedtoshedsomelightontheimpactofstructuralchangeandinternationaltradeonenvironmentalpressure,whereweespeciallyaddressandsolveseveralendogeneityissuesthataddfurthercomplexitytotheanalysis.

简介：Inthispaper,theapplicationofhomotopymethodstotheloadflowmulti-solutionproblemsofpowersystemsisintroduced.BythegeneralizedBernshteintheorem,thecombinatorialnumberC2n^misshowntobetheBKKboundofthenumberofisolatedsolutionsofthepolynomialsystemtransformedfromloadflowequationswithgenericallychosencoefficients.AsaresultofthegeneralBezoutnumber,thenumberofpathsbeingfollowedisreducedsignificantlyinthepracticalloadflowcomputation.Finally,thecompleteP-Vcuresareobtainedbytrackingtheloadflowwithhomotopymethods.

简介：Thispaperpresentedtheapplicationofthedirecthotchargerolling(DHCR)technologyinNingboSteel.Fiveaspectshavebeensystematicallyaddressedandanalyzed,whichincludesalesorder,productionscheduleprogramming,steelmaking,continuouscastingandhot-rolling.TheaverageDHCRproductratehasreached55%andtheaverageslabchargingtemperature699℃.Asaresult,theproductioncost,theenergyconsumptionandtheCO2emissionhavebeensignificantlyreduced.ItisconcludedthatabreakthroughinapplicationoftheDHCRtechnologyhasbeenachievedatNingboSteel.

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简介：Shen Guorong. RESEARCH ON PRINCIPLE OF DPFC DIRECTIONAL RELAY. AUTOMATION OF ELECTRIC POWER SYSTEMS.1983,Shen Guorong. RCS-978 DIGITAL TRANSFORMER PROTECTION SET. AUTOMATION OF ELECTRIC POWER SYSTEMS.2000,Zheng Yuping. LFP-915 DIGITAL BUSBAR PROTECTION SET. AUTOMATION OF ELECTRIC POWER SYSTEMS.2000

简介：ExperimentalstudieshavebeenconductedontheacousticeffectsofKLEIN-510subbottomprofilerfordifferentsedimentarylayersinestuaryandbayareas.Sedimentarylayerboundariescanberecordedclearlyandcontinuouslybythisinstrumentandthencomparedwiththeresultsfromdrillingcorestorevealsomevariationsofsedimentaryenvironments.Withthisinstrument,theaveragedepositratecanbedeterminedandthebed-rockbeneaththeseabottomcanbefoundout.

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简介：ＡｐｐｌｉｃａｔｉｏｎｏｆＦＳＳｔｏＲｅｄｕｃｔｉｏｎｏｆＡｎｔｅｎｎａｓ＇ＲＣＳ￥ＦｅｎｇＬｉｎ＆ＲｏａｎＹｉｎｇｚｈｅｎｇ（ＵｎｉｖｅｒｓｉｔｙｏｆＥｌｅｃｔｒｏｎｉｃＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＣｈｉｎａ，Ｃｈｅｎｇｄｕ６１００...

简介：Inthispaper,wereviewthecreation,evolutionandapplicationofwetlanddefinitions.VaryingwetlandsarefoundfromthetundratothetropicsandoneverycontinentexceptAntarcticaintheplanet.Wetlandshavemanydistinguishingfeatures,themostnotableofwhicharewaterpresence,uniquesoilconditions,andbiotathatareadaptedtoortolerantofsaturatedsoils.Manywetlanddefinitionshavebeendevelopedbyscientists,U.S.federalagencies,andtheRamsarConventionforbothscientificandregulatorypurposes.Wetlandsarenoteasilydefinedbutawell-conceived,science-baseddefinitionofwetlandsisimportantforscientistsandresourcemanagerstounderstandthenatureofwetlandsand/ortouseandprotectwetlands.Ascientificdefinitionisthebasisforwetlandclassification.Developinganeffectivewetlandclassificationsystemrequiresawell-conceived,science-baseddefinitionandclearlyexplicitguidanceontheappropriateuseofvariouswetlandindicatorstoverifythepresenceofwetlandsontheground.Basedonawell-acceptedwetlanddefinition,bothwetlandclassificationandinventoryfurtherprovideneededinformationandaworkingframeforwiseuseandmanagementofwetlands.

简介：It'soneoftheearliestmedicaltechniquestorelievepain,restorehealthandenjoycomfortwithmanipulations.Knowledgeonspinalneckpain,shoulderpain,lowbackpainandlegpaincanbetracedbacktotheearlystageofhumanevolutionanduprightpositionoftwolegs.ThereforethehistoryoftreatingspinaldiseaseswithTuinaormanipulationsprobablykeepsthesamepacewithcivilization.

简介：Ageonetricalmoirémethodfordisplayingdirectlyisochromaticsandisoclinicsofadiametricallypressedcirculardiskispresented.ItisdemonstratedthatbyusingtwoidenticalordifferentWulffnets(orgrids)notonlythestressfieldsofacirculardiskcanbedisplayed,buttheu-andv-displacementfieldscanalsobeproduced.

简介：HitachiInformationSystemsstarteduptheRFIDbusinessfrom2002andprovidesvarietiessolutions,especiallydevotedtheenergiesontheresearchofmetallictagandthedevelopmentofitsappliedarea.Themetallictagwasdevelopedtowithstandtheharshenvironmentlikevibration,shock,high-pressurewaterinjection,highvoltage,andultravioletirradiation.Becausethemetallictagthatdifferentwiththemetaltagcreatedbefore,isprotectedbythemetallicmaterialthatmadeitverystrongtobeusedintheenvironmentlistedabove.June,2006,ourcompanysuccessfullydevelopedthemetallictagwitharmor-cladstainlesssteel.Therefore,comparingwiththeresintag,themetallictagwithremarkablemechanicalstrengthwassufficientattentiontowithstandtheoutdooruse,eventoresistUV.Bythemethodofscrewfixing,rivettightening,solderingornailstriking,theinstallationprocedurecanbecompleted.Becausethevariousinstallationmethodsweresupported,themetallictagcanbeappliedtomanyindustryareas.Themanagementmarketslikeconstructionmachinery,substationequipment,molds,tools,andmetalliccontainerthatneedtheverystrongtagcanbedeveloped,becauseofthemetallictag.Inthisthesis,itwillbedescribedabouttheresearchbackgroundandtheresearchresultsofmetallictag,thecommercializedmetallictag’sfeaturesandapplicationfields,aswellastheresearchsubjectsinthefutureandrecentdevelopmentsituation.

简介：DPFC percentage restraint differential protection makes use of DPFC in phase current on each side of transformer and DPFC in differential current,Fault on and near busbar is the most serious fault for electric power system transient state stability. Clearing such kind of fault quickly is key to keep system stability. As to line protection,Inter-turn fault is the main kind of fault in electric power transformer. It is meaningful that employing sensitive and secure protection to identify inter-turn fault inside power transformer. In RCS-978 series power transformer protection

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简介：IntroductionAlthoughtheapplicationofmicrowavetechniquehasbeenreportedasanewtypeofenergysourcechemically,itisonlyinrecentyearsthatthistechniquehasbeenusedastheenergysourcefororganicsynthesis.In1986,R.Gedye,etal.,publishedthereportofthebenzoatesynthesisfromtherespectivereactionsbetweenbenzenecarboxylicacidandmethanol,propanolorbutanolundermicrowaveheatingandthecatalysisofH2SO4.