简介：以EM223-16/16-DC.RLY模块元件级的维修实例,阐述了此模块的工作机制,并且通过抄板,将完整的电路图绘制下来,以便各位同行相互学习和交流。

简介：Chinaisanimportantcountryinironandsteelindustry.Powerelectronicsconvertersarewidelyused.Forthecoldrollingmillsofhighspeed,AC-DC-ACconvertersshouldbeused.Inthepaper,thedesignandthecontrolsystemofthelargepowerthree-levelAC-DC-ACconverterwithIGCTsisinvestigated,andaback-to-backlargepowerthree-levelAC-DC-ACconverterwithIGCTshasbeengot.Withaseriesexperiments,theperformanceoftheconverterisexamined.Theexperimentresultindicatestheconverterreachesthedesignrequirementanditshowsexcellentperformance.Theconvertersystemhasbeenputintousesafely.ItisestimatedthattheAC-DC-ACconvertersystemwillbeusedinthedrivesystemsforrollingmillsinthenearfuture.

简介：AluminumfilmscoatedonDIsteelsheetswerepreparedbydirectcurrent(DC)magnetronsputtering.Theinfluenceofthedepositionconditionsandfilmthicknessontheformabilityofcoatedsteelsheetswasstudied.TheresultsofthecuppingtestanddrawingtestshowthatthesubstratetemperatureandthicknessofAlfilmsarethekeyfactorsthataffectAladhesionandformabilityofcoatedsteelsheets.AdhesionbecameworsewhenthethicknessofAlsheetswasmorethan2μm.Andformabilitywasimprovedremarkablywhenthesubstratetemperaturewasincreasedto200℃.

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简介：目前临床上许多医疗单位仍采用巴氏分类法诊断宫颈细胞学涂片。随着TBS诊断方法的逐渐普及，越来越多的单位开始接受这一最新的诊断报告方式。本文将542例宫颈细胞学涂片以TBS诊断报告并结合DNA倍体分析，结果有78例经TBS检查细胞形态有异常改变，但其中只有一例可以诊断为恶性(考虑为CIS)，其余77例均不能作出肯定的恶性诊断。将此78例患者再取材进行DNA倍体分析，结果有6例经DNA倍体分析仪分析为多倍体(DI>2)，术后病理证实均为恶性，阳性检出率为TBS诊断报告结果的6倍。由此可见，在诊断宫颈细胞学时，以“TBS”结合DNA倍体分析，对宫颈癌的早期诊断更有帮助，阳性率及准确性更高。

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