简介:摘要目的探讨柏子苦参片治疗心脏早搏的临床疗效。方法选择确诊的心脏早搏患者280例,随机分为研究组200例与对照组80例,研究组用柏子苦参片(处方组成柏子仁12g,苦参12g,郁金12g,煅磁石10g,黄连12g)。4片/次,1日三次,疗程为一个月。对照组用心律宁片,3片/次,1日三次,疗程为一个月。结果两组临床疗效比较研究组取得总有效率为79.50%;对照组为61.25%,有显著性差异(P﹤0.01)。两组早搏疗效比较,研究组取得总有效率为81.00%;对照组为63.75%,有显著性差异(P﹤0.01)。结论柏子苦参片治疗心脏早搏疗效显著,具有推广应用价值。
简介:""""Sensorless""""Controlof4-Quadrant-RectifiersforVoltageSourceInverters(VSI);1kV4H-SiCJBSRectifiersFabricatedUsinganAIMCappedAnneal;1MHzSelf-DrivenZVSFull-BridgeConverterfor48VPowerPods;3-levelthreephasesoft-switchingPWMrectifierwithsingleauxiliaryresonantcommutatedsnubbercircuit;3-phaseconvertermodelingforunbalancedradialsystems;A100kWHigh-PerformancePWMRectifierWithaZCTSoft-SwitchingTechnique;
简介:A8192ComplexPointFFT/IFFTforCOFDMModulationSchemeinDVB-TSystem,Acomparisonofvariousbuck-boost,convertersandtheirapplicationtoPFC,AControlMethodind-qSynchronousFrameforPWMBoostRectifierunderGeneralizedUnbalancedOperatingConditions,ADCmodelfortransientanalysisofaseriesactivefilterintegratedwithadouble-seriesdioderectifier
简介:AFullyDigitalRapidChargerforElectricScooters,Afuzzy-controlledsingle-phaseactivepowerfilteroperatingwithfixedswitchingfrequencyforreactivepowerandcurrentharmonicscompensation,Afuzzy-logic-basedcontrollerforactiverectifier,AHighPerformanceCMOSCurrent-ModePrecisionFull-WaveRectifier(PFWR),Ahighpoweractivefilterforharmoniccompensationinanelectriclocomotive,Ahigh-power-factor,three-phaseisolatedAC-DCconverterusinghigh-frequencycurrentinjection,AHybridCompensationSystemwithAnActiveFilterandDistributedPassiveFiltersinPowerSystemswithDispersedGeneration。
简介:[内容摘要 ]:目前带有电流自动细调节能力的大电流电化学整流器主要通过自饱和电抗器配合二极管整流或晶闸管整流实现,低电压的 IGBT大电流整流也开始应用在电镀行业中。本文将我公司广泛使用的自饱和电抗器配合二极管整流和晶闸管整流进行对比,与同行业进行交流。