简介:Dampingahybridsteppingmotorwithestimatedpositionandvelocity,Gridcurrentregulationofathree-phasevoltagesourceinverterwithanLCLinputfilter,TorsionalinteractionstudiesonpowersystemcompensatedbySSSCandfixedcapacitor,Amultivariablenewcontrolsolutionforincreasedlonglinesvoltagerestorationstabilityduringblackstartup,
简介:[篇名]Magneto-OpticalStudiesoftheCriticalStatesinc-axisOrientedMgB{sub}2ThinFilmandBulkMgB{sub}2/MgNano-Composites,[篇名]TheSoreteffectonconvectioninahorizontalporousdomainundercrosstemperatureandconcentrationgradients,[篇名]Improvingtheanti-seizureabilityofSiCsealinwaterwithRIEtexturing,[篇名]Coppernanoparticleswithinamorphousandcrystallinedielectricmatrices,[篇名]In-linelaserDopplervelocimeterusingfibre-opticBragggratinginterferometricfilters,[篇名]PreparationofaUV-attenuatingagentusingamechanochemicalreaction,[篇名]DesignofanAdaptiveObserverforSensorlessVectorControlofInductionMachinesunderRegeneratingConditions,[篇名]ConflictovernaturalresourcesamongpastoralistsinnorthernKenya:alookatrecentinitiativesinconflictresolution,[篇名]Releasingnitrogenfromammoniatedligninbywhiterotfunguscometabolizesenvironmentalpollutants,[篇名]Onanalogyanddissimilarityofdependenceofstabilityonseveralparametersinflowsimulations,[篇名]Ontheexponentialstabilityofaclassofnonlinearsystemsincludingdelayedperturbations,[篇名]6-indiameterInPsinglecrystalsgrownbythehot-wall,[篇名]Swing-upControlofaTranslationalInvertedPendulumHavingRestrictedTravel,[篇名]RobustPIDRate-BasedControlforPropagationDelayVariation,[篇名]Apracticalapproachforthedesignofmultivariablecontrolsystems,[篇名]Fibersensordetectslithium。
简介:<正>今明两年钢材、铜和铝市场形势分析预计新一年中国生产资料消费需求谨慎乐观,新增资源保持较高水平,市场的买方格局不会发生大的变化,价格进一步上涨的动力不强。主要物资品种的市场走势如下:钢材:2002年,全国钢材市场升温明显。在国家努力扩大内需的作用下,钢材消费旺盛增长。由于供求关系的改善,国际钢材市场价格的"领涨",国际贸易保护主义抬头,国家出台临时保障措施,以及一些生产厂家和贸易商趁机炒作,推动了市场价格环比的大幅回升,有些板材产品短时期内甚至暴涨数百元。据中国物流信息中心统计,到2002年9月份,全国钢材流通环节比年初上涨了近4个百分点,其中薄板和中板价格分别上涨了7.1%和11.6%。