简介:МинистерствоэкономическогоразвитияиторговлиРоссиив2006годуоценилоразвитиеотечественнойэкономикивыше,чемРосстат2.Какговоритсявмониторинге3социально-экономическогоразвитияРоссиив2006году,распространенномМЭРТвпонедельник26февраля,ростВВП4в2006годусоставил6,8%.
简介:汉语的“N的V”难题,长期以来备受关注但却一直得不到妥善的解决,根本原因在于我们忽略了“N的V”的语篇性,误将一个语篇问题当成是一个句法问题来研究。虽然也有学者很早就发现“N的V”的语篇回指功能,可惜没有抓住这一点深入地挖掘下去。其实,“回指”是解决“N的V”一切问题的关键。抓住了这一点,就能从“N的V”回指对象的事件性中推知“N的V”的事件性,进而得出V的事件性。在此基础上,可以很自然得到这样的结论:“N的V”中的V是一个动词,但与普通动词不同:此时的V是一个指代用法,指代的是“V事件”。有了这一结论,“向心结构”难题就不再是难题,由此衍生出的相关问题也迎刃而解了。
简介:QUALITATIVESTUDYOFSIALOMUCINSCHANGESDURINGN-METHYL-N-NITROSOUREA-INDUCEDCOLONICCARCINOGENESISINMICEWangQiang王强;WangYuanhe王元和;...
简介:InviewofthelimitationsofaRn-GnmodelinthelowfrequencyrangeandthedefectsofanEn-Inmodelincommonusenow,thispaperbuildsacompleteEn-Inmodelaccordingtothetheoryofrandomharmonic.Theparametersforthelow-noisedesignsuchastheequivalentinputnoisyvoltageEns,theoptimumsourceimpedanceZsoptandtheminimumnoisefigureFmincanbecalculatedaccuratelybyusingthisEn-Inmodelbecauseitconsidersthecoherencebetweenthenoisesourcesfully.Moreover,thispaperpointsoutthatitwillcausethemaximum30%miscalculationwhenneglectingtheeffectsofthecorrelationcoefficient7.Usingtheseries-seriescircuitsasanexample,thispaperdiscussesthemethodsfortheEn-InnoiseanalysisofelectroniccircuitspreliminarilyanddemonstratesitscorrectnessthroughthecomparisonbetweenthesimulatedandmeasuredresultsoftheminimumnoisefigureFminofasinglecurrentseriesnegativefeedbackcircuit.
简介:PotexperimentswerecarriedouttoestimateN2fixationbyvetch,milkvetch,sicklealfalfaandbroadbeaninpurestandusinga^15N-labelledsoil.Winterwheatwasusedasthenon-fixingcontrol.The15N-labelledsoilusedwaspreparedbygrowingcorn-wheat-cornsuccessivelyonanearlyorganic-matter-freeXiashuloesssupplementedwithadequateamountsof(15NH4)2SO4,P,Kandmicronutrients,thenincorporatingthese15N-labelledplantmaterialsintothesoilaftereachhavest,andallowingtheplantmaterialstobedecomposedaerobicallyfor410dafterincorporationoftheplantmaterialofthethirecrop.The15Nenrichmentofwheatplant-Nvariedslightlywithorgans,withamaximumdifferenceof9.8%,Basedon15NenrichmentofsoilNinferredfromthemeanvalueofthe15Nenrichmentindifferentorgansofwheat79%-91%oftotalNinthetopsand67%-74%oftotalNintherootsoflegumesstudiedwerederivedfromatmosphere.EstimatebyisotopedilutionmethodwasingoodagreementwiththatbytheconventionaldifferencemethodprovidedvaluesobtainedbythelatterwerecorrectedforseedN,andalsowiththatfromthemeasurementofNaccumulatedinthetopsofthelegumes.
简介:帕金森病是一种普遍的神经退行性疾病,其病理特征是人脑黑质区多巴胺(DA)能神经元的进行性变性、死亡.帕金森病的病因和发病机制虽然至今未明,但氧化应激是主要因素.DA作为脑内主要神经递质,也是一种神经毒素.我们的研究中采用DA作为氧化应激诱导剂,观察了6种神经保护剂的作用效果.MTT分析其存活率、荧光双染色法观察其形态变化以及流式细胞仪分析凋亡和细胞周期变化,结果显示DA诱导后细胞存活率随浓度、时间进行式降低,而6种保护剂分别有不同程度的保护效果.
简介:[摘要] 本文阐述了SY232型压梗机的压梗机构进行维护保养,或对其磨损、损坏的零部件进行维修更换,需先将驱动压辊的减速机拆卸;针对减速机的拆卸,设计了一套机械式螺旋拉拔拆卸装置,保证减速机在压梗辊传动轴的轴线上均匀受力,便捷快速拆卸,提升了设备维修的工作效率。