简介：Amathematicalmodelforatmosphericstagedcirculatingfluidizedbedcombustion,whichtakesfluiddynamics,combustion,heattransfer,pollutantsformationandretention,intoaccountwasdevelopedintheinstituteofEngineeringThermophysics(IET)recently.Themodelofgassolidflowatthebottomofthecombustorwastreatedbythetwo-phasetheoryoffluidizedbedandintheupperregionasacore-annulusflowstructure.ThechemicalspeciesCO,CO2,H2,H2O,CH4,O2andN2wereconsideredinthereactionprocess.Themathematicalmodelconsistedofsub-modelesoffluidnamics,coalheterogeneousandgashomogeneouschemicalreactions.heattransfer,particlefragmentationandattrition,massandenergybalancetec.Thedevelopedcodewasappliedtosimulateanoperatingstagedcirculatingfluidizedbedcombustionboilerofearlydesignandtheresultswereingoodagreementwiththeoperatingdata.Themainsubmodelsandsimulationresultsaregiveninthispaoper.

简介：Atwo-stagedelectronicballastwithwidedimmingrange,highpowerfactor(PF)andlowelectromagneticinterference(EMI)ispresented.Itchangestheinputvoltageofthestageofpowerinverterfordimmingcontrol,soitovercomessomelimitationsoftraditionalelectronicballaststhatusefrequencyvariation.Atthesametime,thestageofpowerinverterrunsunderthesoft-switchingatthefixedswitchingfrequencyandreducesEMIgreatly.Itsprincipleandcharacteristicareanalyzedindetail,andexperimentalandsimulatedresultsareobtainedona40Wfluorescentlamp.

简介：上演注射者展出了大潜力完成低排出物并且正在成为许多民用的飞机的更好的选择。而且，它正在答应在军事引擎采用这个注射者图案，它要求大多数空气进入的燃烧通过到还原剂烟排放的注射者的燃烧室。然而，瘦上演注射者在低负担操作对燃烧不稳定性和扑灭敏感，因此为拓宽它的稳定的操作范围的技术为它在真实引擎的申请是关键的。

简介：Improvementonextinctionandpollutionemissionhavebecomeoneofthemostprominentresearchtopicsingasturbine.Itiswidelyrecognizedthatthefuel/airmixturedistributionintherecirculationzoneisacriticalfactorinimprovingleanblow-out(LBO)andignition.Thispaperproposedanewlowemissionschemewithfuelstagedcentrallyandhybridinjectortoimproveflameoutandemission.Arelativesmallamountoffuelentersintocentralpilotairblastatomizerburnerandthenatomizedbyinnerswirlair.Theremainingmajorityoffuelisdirectlyinjectedintovanechannelsoftheprimaryswirlerthroughaseriesofholeslocatedonthesidewallofthemainstage.Onlypilotstageisfueledunderignitionandleanflameoutcondition.Theuniformityoffuel/airmixturedistributionintheprimaryzoneofthenewdesigndecreasesNOXemission,meanwhilethefuelairmixtureinpilotrecirculationzoneislocallyrichtoimproveflameoutandignition.Experimentalinvestigationwasconductedtocomparethenewschemewithbaselinedesignofdual-swirlerintermsofLBOandignitioncharacteristicsunderthesameconditioninamulti-sectorcombustor.Itisfoundthatthefuel-airratioofignitionlimitandLBOdecreasewiththereferencevelocityincreasing.Theexperimentalresultsalsoshowthatthenewschemesuccessfullyimproveleanblow-outandbroadentheoperationrangeofthecombustor.Theexperimentalresultsindicatedthatthecentrallystagedschemecanwidentheoperationboundaryofthecombustorandcanprovideguidancefordesignandoptimizationofcombustionchamber.

简介：OnMay8,2018,"Lancang-MekongBrightnessActionforCambodia&InaugurationCeremonyofBrightnessActionPhaseII"wassuccessfullystagedinTounFaSchoolofPhnomPenh.SponsoredbyChinaPublicDiplomacyAssociationandsupportedbyOverseasChineseCharityFoundationofChina,AierEyeHospitalandEyeCareFoundation,fromMay6to13,"Lancang-MekongBrightnessAction"organizedtwomedicalteamstoleaveforPhnomPenhandSihanoukofCambodiaaswellasVientianeandNajiShawanofEaos,offeringeyehealthexamination,eyehealtheducationcourseandopticianserviceforpublicinterest.

简介：AbstractPurpose:Tibial plateau fracture (TPF) is a devastating injury as it shatters lower articular surface of the largest joint. Apart from bony injury, TPF can lead to great soft tissue envelope compromise which affects the treatment plan and outcome. In the present study, clinical results were assessed in cases of high energy TPFs treated in staged manner.Methods:Twenty-three (20 males and 3 females) patients of high energy communited TPFs (Schatzker type V and VI) were consecutively treated.1 All the patient had compromise of overlying skin conditions. They were all successively scheduled for staged treatment plan which comprised of application of bridging knee external fixator on the first day of admission and definitive internal fixation after skin and soft tissue overlying the fracture were healed. Schatzker type I, II, III and IV were excluded from the study. Primary survey was done and patient who had head injury, chest and abdominal injury, pelvic injury and contralateral limb injury and open fractures were excluded from the study. The patients were also evaluated in terms of wound complications, axial and rotary alignment of limb, fixation failure, articular congruity and range of motion of the knees and post injury employment. Statistical analysis was done using SPSS software.Results:Maximum follow-up period was 13 months. All the fractures were united at final follow-up. Clinical evaluation was done with the Tegner Lysholm knee scoring scale.2 Excellent results were found in 78% cases and good and fair results in 22% cases. There was significant correlation between range of motion and the Tegner Lysholm knee score (p < 0.001, Pearson correlation coefficient = 0.741). The correlation between the score and the radiographical union duration was significant (p = 0.006, Pearson correlation coefficient =-0.554).Conclusion:A staged treatment plan allows healing of soft tissue envelope, with avoidance of dreadful complications such as compartment syndrome and chronic infection. In addition, a staged treatment strategy does not hamper the fracture reduction, bony union and the functional results.

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