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货币中性的古典原理说明,货币供给变动不影响()变量,而且这个原理更适合()期。
增值税的交通运输服务包括有()
WomenareworsethanmenatturningnetworkstotheiradvantageINTHErarefiedworldofthecorporateboard,agoodnetworkmatters.Recruitmentofteninvolvesword-of-mouthrecommendations:gettingonashortlistiseasierifyouhavetherightconnections.Newresearchsuggestsmenusecontactsbetterthanwomen.MarieLalanneandPaulSeabrightoftheToulouseSchoolofEconomicsmeasuretheeffectofanetworkonremunerationusingadatabaseofboardmembersinEuropeandAmerica.Theyfindthatifyouweretocomparetwoexecutivedirectors,identicalineverywayexceptthatonehad200ex-colleaguesnowsittingonboardsandtheother400,thelatter,onaverage,wouldbepaid6%more.Fornon-executivesthegapis14%.Thereallyjuicyfindingconcernsthedifferencebetweenthesexes.Amongexecutive-boardmembers,womenearn17%lessthantheirmalecounterparts.Thereareplentyofplausibleexplanationsforthisdisparity,frominterruptionstowomen’scareerstoold-fashioneddiscrimination.Buttheauthorsfindthatthispaygapcanbefullyexplainedbytheeffectofexecutives’networks.Mencanleveragealargenetworkintomoreseniorpositionsoraseatonamorelucrativeboard;womendon’tseemtobeableto.Womencouldjusthaveweakerconnectionswithmembersoftheirnetworks.“Womenseemmoreinclinedtobuildandrelyononlyafewstrongrelationships,”saysMrSeabright.Menarebetteratdevelopingpassingacquaintancesintoanetwork,andbetteratmaintainingahighpersonalprofilethroughthesecontacts.Womenmay,ofcourse,alsobehurtbytheexistingdominanceofmenonboardsandamalepreferenceforfillingexecutivepositionswithothermen.Butatendencytothinkofothermenfirstwillbeamplifiediftalentedwomendon’tstayontheradar.Interestingly,thereisonlyamarginalpaydifferencebetweenmenandwomenwhenitcomestonon-executivedirectors,andnodifferenceintheeffectivenessoftheirnetworks.Itispossiblethatthisreflectspressurefor“genderquotas”oncorporateboards.Womenareabletofindtheirwayontoshortlistsforlower-paid,non-executivepositions.Butthat’snotwheretherealpowerlies.3.Althoughmenarebetteratbuildingpassingacquaintancesintoanetwork,theyarelessactiveinthesecontacts.
力的可传性原理适用于刚体,同样也适用变形体。
广播属于______通信系统
能量信号的自相关函数是_____函数。
功率信号的自相关函数和_________是一对傅里叶变换。
窄带高斯噪声的包络服从分布。
以下说法正确的是
同步解调中同步的含义是
对32路语音信号进行PCM时分复用编码,语音信号的抽样频率为8kHz,编码位数为8,则32路时分复用信号的总的二进制码元速率是_____波特。
PCM编码输入的抽样脉冲值为+1270个量化单位,用逐位比较反馈型编码器将其进行8位PCM编码后的量化误差是______个量化单位。
一个理想低通系统,无码间串扰的最高码元传输速率是系统带宽的_____倍,
当码组仅用于纠正错误时,若要求纠正t个错误,则最小码距是_____
根据香农信道容量公式,信号功率不变,信道带宽无限增大,信道容量也会无限增大。