简介：ThispaperintroducesthemainPCBrulesbasedonPentiumMformobilecomputerarchitectureinmilitaryarea,settlesrulesoflayout,inductssimulatediscussiontocrosstalkofparallelingtransmissionlines,advertsthematchingrulesoftimelength,andoffersanexecutionwaytoreducemotherboardareaandimprovemakingprocess.

简介：OnOctober27,theThreeGorgesengineeringgreetedanothermilestoneinitsconstruction.LiYongan,presidentofChinaThreeGorgesProjectCorporationdeclaredthatthegoalof136mreservoirimpoundmenthadbeenachieved,andtheThreeGorgesreservoirhadformallyenteredthestageofnormaloperationanddispatching.

简介：采用西门子M4控制器对龙门刨床的主拖动系统进行改造。由原来的直流驱动改为交流变频驱动，实现基于现代控制器的参数控制，对主拖动系统进行了基于M4控制器的设计计算以及参数选用和设置，使系统较大程度地简约化，具有柔性、易维护、可靠性高、节约资源等特点。