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

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

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

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

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.

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简介：Ｍｒ．ＷａｎｇＺｈｉｌｅ，ＤｉｒｅｃｔｏｒｏｆｔｈｅＲｅｓｅａｒｃｈＤｅｐａｒｔｍｅｎｔｏｆｔｈｅＲｅｌａｔｉｏｎｓＢｅｔｗｅｅｎＥｃｏｎｏｍｙａｎｄＴｒａｄｅｕｎｄｅｒｔｈｅＭＯＦＴＥＣｉｓａｎｅｘｐｅｒｔｏｎｉｎｖｅｓｔｍｅｎｔｂｙｍｕｌｔｉｎａ...

简介：ＤｅｖｅｌｏｐｍｅｎｔｏｆＳｏｃｉａｌＦｏｒｅｓｔｒｙｗｉｔｈＣｈｉｎｅｓｅＣｈａｒａｃｔｅｒｉｓｔｉｃｓTXＤｅｖｅｌｏｐｍｅｎｔｏｆＳｏｃｉａｌＦｏｒｅｓｔｒｙｗｉｔｈＣｈｉｎｅｓｅＣｈａｒａｃｔｅｒｉｓｔｉｃｓＢｙＺｈａｎｇＣｈｕｎｘｉａＸｕＷｅ...

简介：CrudeoilsfromdifferentbasinsinChina,AustraliaandNewZealandwereanalyzedtocharacter-izearomatichydrocarbonsproducedindifferentenvironmentsbymeansofGC/MS.Thedistributionsofsomecommoncompoundssuchasnaphthalene,phenanthrene,chrysene,pyrene,fluoranthene,fluorine,dibenzothiopheneanddibenzofuranwerefoundtoberelatedtosedimentaryenvironments.Especiallytherelativecontentsoffluorenes,dibenzofuransanddibenzothiophenescanbeusedtodi-videtheoilsintothreetypes(1)salineormarinecarbonateenvironment;(2)fresh-brackishwaterlake;(3)swampandcoal-bearingsequence.Aromaticbiomarkers(e.g.retene,nor-abietene,derivativesoflupeolandβ-amyrin)representhigherplantinpultswithrespecttotheprecursorsofcrudeoils.Highcontentsofsulphur-containingcompoundslikebenzothiopheneanddibenzothiopheneseriesindicateareducingsulphur-abundantdiageneticcondition.Thebenzohopaneseries(C32-C35)wasidentifiedbothinhypersalineandcoal-bearingbasins,anditispostulatedtobetheresultofstrongbacteriaactivity.Inallthesam-ples,acompleteseriesofalkylbenzeneswasanalyzed.Thesimilarityofitscarbon-numberdistrbu-tionwiththatofn-alkanesprobablysuggeststheirgeneticrelationship.Thedistributionofthemethylphenanthreneseriesreflectstheevolutiondegreeofcrudeoils,MPIholdingapositivecorrelationwithC29-sterane20S/(20S+20R).

简介：TheradiationfieldsoftheArchimedeanspiralantennaarederivedbyapproximatingthespiralwithaseriesofsemicircles.Thecomputationalformulaeforcalculatingtheradiationfieldsoftheairbornespiralantennasaredevelopedbyusinggeometricaltheoryofdiffraction(GTD).Thecalculatedresultsareingoodagreementwiththeexperimentalones.

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简介：AIM:Toinvestigatetheclinicalcharacteristicsoffulminanthepatitisinpregnancy.METHODS:Wecomparedandanalyzedtheetiology,clinicalcharacteristics,andlaboratoryexaminationsof25casesoffulminanthepatitisinpregnancyand30casesoffulminanthepatitisnotinpregnancy.RESULTS:HBVinfectionandchronicfulminanthepatitisweremostcommonbothinthepregnantandinthenon-pregnantgroups.Jaundice,digestivetractsymptoms,increaseofbilirubinandthrombinogenactivitywerethemainmanifestations.Theincidenceofhepaticencephalopathy(HE)andhepato-renalsyndrome(HRS)wassignificantlydifferentbetweenthetwogroups.Theincidenceofpretermlabor,deadfetusandneonatalasphyxiawashigh.CONCLUSION:Fulminanthepatitisislikelytooccurinlatepregnancywithmoreseverecomplications,whichsignificantlyinfluencesmaternity,perinatalfetus,andnewborn.

简介：Thecharacteristicsofalaminarwalljetsubmittedtodifferentconfigurationshavebeenexperimentallyexploredinordertoobtainabetterknowledgeoftransitionmodifications,Infactdifferentparameterscanaccelerateordelaythetransitionusingasmoothorroughsurface,heatedornot,submittedtovibrationsornot.Inthisstudy,significanteffectscanbenoticed.Ithasbeenpossibletomeasurethebeginningofgrowthratesofdisturbanceamplitudeusingawindtunnelandcomparingtheresultswiththelinearstabilitytheory.

简介：与从在1970和2001之间的热带气旋年鉴的数据，统计分析被执行学习气候的特征乍见陆地TC(作为TCshereafter注意了)在有详细规格的中国，注意集中于乍见陆地频率，地点，支撑，腐烂，转变，增强和驱散等等。结果显示在土地上的TC的支撑的时期是相当不同的为不同乍见陆地看到，并且从Guangxito浙江增加了。TC紧张的最明显的减少主要在12个小时以内发生在以后乍见陆地。TC越强壮，它越腐烂。TC是的在上区域驱散罐头嬉痞的集会Heilongjiang，极北，并且云南，最西。而且，Guangxi是有高作为与另外的沿海的区域相比驱散率和题目到TC驱散的一个区域。

简介：Urbanforestry,whichroseinthewestinthelatterhalfofthe20thcentury,isatypeofforestryservingforcity.Itsimportantcharacteristicisthatitmakesthroughitsnarrowsense,or"urbanafforestation",whoseobjectiveistomakecitygreenandbeautiful,anddevelopsintoaforestrysystemservingfortheurbansystem.Theconsequenceofrapidmoderncivilizationisthatskyscrapersconcentrateinurbandistrictandgreenspacebecomenarrower,resultingthatgreen