简介：1.IntroductionCoalislistedinChina’senergypolicyasthepredominantfueltobeusedforthermalpowergeneration.ItincludesnearlythewholespectrumofcoalsthatChinahas,rangingfromanthracitetobrowncoal.ThisposesasituationtoChina’sutilityboilermanufacturersthattheirproductshavetocopewithallkindsofcoalavailable.Chinaisnowproducingafullrangeofutilityboilerswithca-pacitiesfrom35t/hthrough2000t/h.Theyhavesuccessfullyburnedanthracitieswithvolatilemattergreaterthan7%andlowgradecoalswithhighmoistureandhighashcontents.Theyburnbituminouscoalsandligniteswithsatisfactoryefficacy.

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简介：TheresolutionexpressionforthetemperaturedependenceofthecurrentandthresholdvoltageisdeducedaswellastheanalysisoftemperaturecharacteristicsofBJMOSFET.EquivalentcircuitofanalysisandsimulationhasbeenestablishedfortheBJMOSFETtemperaturecharacteristics.ByusingthegeneralcircuitsimulationsoftwareofPSpice9andcomputersimulation,characteristicgraphsoftheBJMOSFEToutputcharacteristic,transientcharacteristicandamplitude-frequencycharacteristicwithtemperaturevariationareobtained.TheresultsaccordedverygoodwiththeoreticalanalysisandprovedthatBJMOSFEThasbettertemperaturecharacteristicsthantraditionalMOSFET.

简介：ＣｏｎｓｕｍｐｔｉｏｎＣｈａｒａｃｔｅｒｉｓｔｉｃｓａｎｄＰｒｏｓｐｅｃｔｓｏｆＣｈｉｎａ＇ｓｅｃｏｎｏｍｙｈａｓｅｎｔｅｒｅｄａｐｅｒｉｏｄｏｆｒａｐｉｄ，ｓｕｓｔａｉｎｅｄａｎｄｈｅａｌｔｈｙｄｅｖｅｌｏｐｍｅｎｔ．Ｅｖｉｄｅｎｃｅｓｈｏｗｓｔｈ...

简介：Forhundredsofyearspeoplehavesailed,flown,andwalkedintotheareanowknownastheUnitedStates.Exceptfortheapproximately2millionNativeAmericans.everyonewholiyesintheUnitedStatesisdescendedfromaculturethatwastransplantedfromsomewhereelseintheworld.Theseculturescometogethertoformwhatmanypeoplenowrefertoasa″saladbowl.″Eachcultureaddingitstastetothemixbutkeepingitsownidentity.Themeltingpot″ideaofoldhasbeenreplaced.ThiscanbeseenbythenumberofChinatowns.Koreatowns,Poletowns,etc.

简介：Someofthemostinterestingrefractionpropertiesofphononiccrystalsarerevealedbyexaminingtheanti-planeshearwavesindoublyperiodicelasticcompositeswithunitcellscontainingrectangularand/orellipticalmultiinclusions.Thecorrespondingbandstructure,groupvelocity,andenergy–fluvectorarecalculatedusingapowerfulmixedvariationalmethodthataccuratelyandefficientlyieldsallthefielquantitiesovermultiplefrequencypass-bands.Thebackgroundmatrixandtheinclusionscanbeanisotropic,eachhavingdistinctelasticmoduliandmassdensities.Equifrequencycontoursandenergy–fluvectorsarereadilycalculatedasfunctionsofthewave-vectorcomponents.Bysuperimposingtheenergy–fluvectorsonequifrequencycontoursintheplaneofthewave-vectorcomponents,andsupplementingthiswithathree-dimensionalgraphofthecorrespondingfrequencysurface,awealthofinformationisextractedessentiallyataglance.Thiswayitisshownthatacompositewithevenasimplesquareunitcellcontainingacentralcircularinclusioncandisplaynegativeorpositiveenergyandphasevelocityrefractions,orsimplyperformsaharmonicvibration(standingwave),dependingonthefrequencyandthewave-vector.Moreover,thatthesamecompositewheninterfacedwithasuitablehomogeneoussolidcandisplay:(1)negativerefractionwithnegativephasevelocityrefraction;(2)negativerefractionwithpositivephasevelocityrefraction;(3)positiverefractionwithnegativephasevelocityrefraction;(4)positiverefractionwithpositivephasevelocityrefraction;oreven(5)completereflectiowithnoenergytransmission,dependingonthefrequency,anddirectionandthewavelengthoftheplane-wavethatisincidentfromthehomogeneoussolidtotheinterface.Forellipticalandrectangularinclusiongeometries,analyticalexpressionsaregivenforthekeycalculationquantities.Expressionsfordisplacement,velocity,linearmomentum,strain,andstresscomponents,aswellastheenergy–fluandgroupveloc

简介：Thestatisticaldistributionofwavecrestcharacteristicssuchascrestlength,crestheight,jointcrestheightandlengthareanalyzedbasedonnumericalsimulationof3-Drandomwaves.Theeffectsofdirectionalfunctionsandwavecrestdefiningmethodsoncrestcharacteristicsarealsostudied.Theresultsshowthatwavecrestsarenolongeruniformandcontinuousindirectionalwavefield;thedistributionofcrestlengthisobviouslyinfluencedbythedirectionalfunction;thestatisticsofcrestcharacteristicsobtainedbythetwodifferentmethodsarealmostthesame.

简介：ModernEnglishisaninternationallanguageintheworld.BesidesGreatBritain,Englishisspokenasfirstlanguagein39countries.Thesecountriesarelocatedindifferentregionswithdifferentnaturalfeatures,historydevelopmentandculturalcharacter-istics.Thus,Englishusedinthesedifferentregionscarriesitsownregionalcharacter—formingEnglishregionalvarieties.ThemainEnglishregionalvarietiesare:BritishEnglish,AmericanEnglish,CanadianEnglishandSouthAfricanEnglish.CanadaisarichcountryinNorthAmericawithitsowncharacteristics,whichof

简介：SincetheendoftheColdWarintheearly1990s,ithasbecomeincreasinglycommontoconceiveofhistoryintermsof'post-xera'-the'Post-ColdWarEra,''Post-AmericaEra,''Post-WesternEra,'tonameafew.Behindthenumerouserasthatthislabelhasappliedto,wefeelthattheworldtodayisundergoinggreatchangeswhichareentirelydifferentfromtheonesthathave

简介：ＰｈｏｔｏｃｏｎｄｕｃｔｉｖｉｔｙＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＰｏｒｏｕｓＳｉ①ＣＨＡＯＺｈａｎｙｕｎ，ＷＡＮＧＫａｉｙｕａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＥｌｅｃｔｒｏｎｉｃＥｎｇｉｎｅｒｉｎｇ，ＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｊｉ...

简介：ThesepastfewyearshaveseenanunprecedentedexpansioninthenumbersandachievementsofChinesethinktanks,supportedbypolicyandfunding.However,thereisstillalongwaytogotoboosttheirstrengthandsizesothattheymaintaintheirChinesecharacteristicsandwieldglobalinfluence.

简介：Y-RiemannianmetricgYisanimportanttoolinFinslergeometry,whereYisasmoothnon-zerovectorfieldonFinslermanifold.IfYisageodesicfield,itisveryeffectivetostudyflagcurvatureusingY-Riemannmetric.Inthispaper,usingaspecialY-Riemannmetric(thatis,socalledv-Riemannmetric),westudyhyperspheresinaMinkowskispaceandgivesomecharacteristicsofhyperspheresinaMinkowskispace.

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简介：ＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＯＺＯＮＥＶＡＲＩＡＴＩＯＮＯＶＥＲＡＮＴＡＲＣＴＩＣＡ￥ＺｈｏｕＸｉｕｊｉｉ（周秀骥），ＬｕＬｏｎｇｈｕａ（陆龙骅），ＺｈｅｎｇＸｉａｎｇｄｏｎｇ（郑向东）ａｎｄＧｕｏＳｏｎｇ（郭松）ＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳ...

简介：Astheworldeconomydevelopsrapidlyandurbanizationisundergoingdeepgrowth,thecitydiseasescausedbytheclustereffectofthecitiesarebecomingincreasinglyclear.HowtotreatthecitydiseasethroughnewtechnologieslikeIOT(internetofthings),cloudcomputingand4GandbuildsmartcitywithChinesecharacteristicsthroughtheexplorationofuniquecitydevelopmentmodelwillbekeyconcernedissuesforthepublic.

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简介：PVC(聚乙烯化合物的氯化物)在生产RPF前从浪费塑料被孤立(拒绝纸与塑料燃料)，并且包括性质，生热的价值，热分解，氯内容和动力学分析的生产RPF的特征被分析。基于TGA(Thermogravimetric分析)的结果，动力学特征被使用是为获得激活的最普通的方法的基辛格方法和Ozawa方法分析精力，和TGA的试验性的条件如下被设置：在氮气氛，与20mL/min的煤气的流动率，加热5-50的率??????????????????六吗？？

简介：Basedonthefirstlawofthermodynamicsandthethermaldiffusionequation,thededucedtheoreticalmodelofmitochondrialthermogenesissatisfiestheLaplaceequationandisaspecialcaseofthethermaldiffusionequation.Themodelsettlesthelong-standingquestionoftheabilitytoincreasecellulartemperaturebyendogenousthermogenesisandexplainsthethermogeniccharacteristicsofbrownadipocytes.Themodelandcalculationsalsosuggestthatthenumberoffreeavailableprotonsisthemajorlimitingfactorforendogenousthermogenesisanditsspeed.

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简介：Stroma-freehemoglobin(SFHb)waspreparedfromfreshorout-datedwholebloodbylysingredcells.Atdifferenttemperatures,pyridoxal5-phosphate(PLP)wasaddedina4:1molar-ratiototheHbtetramerfollowedbyreductionwithNaBH4underN2for16hrssubsequentcrosslinkingbyglutaraldehydeinpresenceoflysinefor14-16hrs.Yieldedsolublepyridoxalatedpolyhemoglobin(PolyHb-P).5%-20%gradientSDS-PAGEshowedthechangeoftheHbmolecularweight(MW)aftercrosslinking.GelchromatographyshowedthatthepolyHb-Phadacontinuousdistributionofmolecularweightwiththerangefromabout65,000to600,000Dalton.ThepolyHb-Psolutionprovidedanornaloxygencarryingwith23.1ofP50atpH7.24or26.1ofP50atpH7.24.