简介:TheparametricoptimizationoftheNe-CuBrUVlaserexcitedbylongitudinalpulseddischargeisanalysedbyusingaself-consistentkineticmodel.Consistentcharacteristicsoftheoptimizationprocessareobtainedbycomparingwiththeexperimentalresults.Simulationresultsshowthatneonionscomeintobeingalongwithconsiderabledepletionoftheground-statecopperatoms.Andtheoptimizationofthedischargetubediameteristhetradeoffbetweenthespecificoutputphotondensityandthetotalactivevolume.Boththeoptimalneongaspressureandtheoptimalreservoirtemperatureresultfromthebalancebetweentheneoniondensityandtheground-statecopperatomdensitytoarriveatamaximumoftheirproduct.
简介:LetZbeatopologicalspaceandmappingA2:Z→B(H)withclosedrangeR(A2)becontinuous.SomenecessaryandsufficientconditionsofthecontinuityofM-PinversesAz+aregivenin[1],[2].ItisoneofthemthatAZ+iscontinuousifanaonlyifAZ+islocallybounded.Inthispaper,wediscussthefollowingproblem:iflimAn=A0inB(H)and||An+||isunbounded(i.e.theabovenecessaryandsufficientconditionfails),whathinHwillmaketheequations:limAm+h=A0+horw-limAn+h=A0+hbetrue.Forthispurposethreetheoremsandanerrorestimationaregiveninthispaper.
简介:以前人们对“0”没有概念,书写202时.就会在2和2之间留空隙来表示.所以有时候会分不清楚22和202。这给人们日常生活带来许多不便。正因为如此,聪明的商人们才发明了“0”这个数字。“0”除了能把留下来的空隙填满,还可以表示其他意义。
简介: 在我还是十几岁少女的时候,心目中的爱和婚姻是那种充满诗情画意的田园牧歌式的.家政课上,老师让我们设计完美的婚礼和婚庆接待会,包括婚礼最后抛洒大米,新郎新娘乘坐豪华轿车缓缓离去,就像电影中那样,俊男靓女终成眷属,从此幸福地生活在一起.但现实完全不是这样的.……