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1.
IMMUNOHISTOCHEMICALLOCALIZATIONOFEPIDERMALGROWTHFACTORRECEPTORANDC-erbB-2ONCOGENEPRODUCTINDEVELOPINGHUMANPLACENTA(马军)(王作清)(苏宝...  相似文献   

2.
SIX-YEAREFFICACYOFPLASMA-DERIVEDHEPATITISBVACCINE(ABSTRACT)¥SuiXiufen;XuHuiwen,MenBoyuan;WangXueliang;LiuPengbo(DepartmentofE...  相似文献   

3.
PROTECTIVEEFFECTOF3,6-DIMETHAMIDODIBENZOPYRIODONIUMCITRATEONCALCIUMPARADOXINTHEISOLATEDGUINEAPIGHEART(孙良起)(袁素芬)(马宏锐)(邱培伦)SunL...  相似文献   

4.
CD_4~(+)EFFECTORCELLSDEFAULTTOTHETH2PATHWAYININTERFERONγ-DEFICIENTMICEINFECTEDWITH LEISHMANIA MAJORWangZhi'en;StevenL.Reiner,Z...  相似文献   

5.
THEDISTRIBUTIONOFATRIONATRIURETICPOLYPEPTIDE(ANP)-LIKESUBSTANCEINTHEHEARTOFTHEHUMANFETUSANDRAT-ANIMMUNOHISTOCHEMICALSTUDYLeiT...  相似文献   

6.
APPLICATIONOFHMB-45MONOCLONALANTIBODYANDS100PROTEININTHEIMMUNOHISTOCHEMICALDIAGNOSISOFMELANOMALiuDanya(刘丹亚);SuBaoshan(苏宝山);Xu...  相似文献   

7.
TLYMPHOCYTESUBSETSOFPERIPHERALBLOODANDTHEIRRELATIONSHIPWITHBETA-2-MICROGLOBULININMULTIPLEMYELOMA(郑成云)(陈学民)(王宝燕)(陈开浚)ZhengChen...  相似文献   

8.
RESEARCHESONRELATIONSHIPBETWEENHEARINGLOSSANDCONTENTOFFeANDZnINPERILYMPH,CSF,SERUM,ANDHAIRSXuMin(许珉);FanYulin(樊玉林);GaoZbeizho...  相似文献   

9.
CMACBASEDNONLINEARPROCESSCONTROLSYSTEMS,PARTI:CMACWITHGENERALBASISFUNCTIONSFORMOD-ELLINGDuanPeiyong(段培永)LiChengdong(李成东)ShaoH...  相似文献   

10.
INSITUIMMUNOHISTOCHEMISTRYSTUDYOFINTERCELLULARADHESIONMOLECULE-1(ICAM-1)INCHRONICCOLITIS AND COLON CANCERChenGaoping;LiuYong;...  相似文献   

11.
多址干扰的存在是影响CDMA系统性能和限定系统容量的重要因素。针对多址干扰信号的特点,研究了一种改进的硬判断决并行干扰多用户检测器。分析和仿真结果表明,该多用户检测器具有更好的性能和抗远近效应的能力,具有广泛的应用前景。  相似文献   

12.
IntroductionFrequency hopping ( FH) transceivers arewidely used for the secure communication in mili-tary and commercial fields.To avoid the attack ofthe intelligent jammer,the pseudorandom number( PN) generator with large complexity is commonlyapplied to produce sequences for frequencies con-trol[1] . In general,linear span,calculated byBerlekamp- Massey algorithm,is chosen as the cri-terion to evaluate the complexity of various se-quences,which is the degree of the shortestdegreerecursion …  相似文献   

13.
为提高系统容量,提出了一种基于无碰撞区(NHZ)跳频序列的两级FFH/MFSK系统(称为NHZ/FFH系统).系统中全体用户被分成若干组,每组分配一个互不相同的NHZ跳频序列.由于NHZ跳频序列的汉明互相关在NHZ内等于0,只要用户间相对延迟不超过无碰撞区,就可以消除组间用户的干扰,多址干扰只来源于同一组内的用户.通过采用适于异步系统的多用户检测器,可以进一步提高系统的检测性能,且多用户检测器的规模和复杂度只与组内用户数有关.结合系统模型进行了干扰分析和仿真研究,结果表明,与现有MS/FFH系统相比,在相同的信道条件下,对于相同的误码率级别,NHZ/FFH系统支持的用户数多.  相似文献   

14.
IntroductionMobility as an essential characteristic of wire-less network has received considerable attention inrecent years.A number of system- specific solu-tions have been developed for2 G( such as GSM)and 3G( such as UMTS) wireles networks.Fromthe Internetpointofview these solutions can be re-garded as layer- 2 solutions for wireless access net-works working transparently to the layer- 3 ( IPlayer) [1] .The evolution of wireless network is be-ing strongly influenced by mainly two compo…  相似文献   

15.
IntroductionDirectsequencespreadspectrummultipleaccess(DS/SSMA)systemcanofferhighercapacitythanfrequencyhoppingspreadspectrummulti-pleaccess(FH/SSMA)system,butthecapacityofthesystemdependsgreatlyonthepoweroftheuser'sreceivedsignals,thatisso-callednea…  相似文献   

16.
IntroductionAdaptiveantennaarrayscanreduceco channelinterference (CCI)fromotherusersaswellasmitigatetheeffectofmultipathfadinginwirelessenvironments .SinceCDMAsystemsareinterferencelimitedinnature ,smartantennahasbeenregardedasoneofthecoresystemcomponents…  相似文献   

17.
Introduction Since Hochwald and Sweldens[1], Hughes[2]independently invented differential unitary spacetime code, it aroused huge enthusiasm on the de-sign of differential modulation methods. No chan-nel state information (CSI) is needed at the trans-mitter and the receiver side, so the demodulation isvery simple. These works all concern the flat fad-ing environment and low data rate case, assumingthe channel is approximately constant for a coher-ent interval. But for the multi-path environ…  相似文献   

18.
ALPHA润滑系统在船舶主机气缸润滑系统中得到广泛应用.以8500箱实船的MAN B&W MC主机ALPHA润滑系统为原型,通过分析其组成和工作原理,建立了ALPHA润滑系统的控制、操作仿真系统,结果表明,仿真系统能够满足实船的操作要求.  相似文献   

19.
首先分析了智能天线在CDMA系统中应用,理论分析了通过空间特征向量来对其实现“零陷“,提出采用压低基站的上行干扰提升系统的性能的新算法,实验仿真显示:该算法通过空域滤波,能够显著提高系统性能.  相似文献   

20.
建立了网络化数控加工系统结构,研制出适于网络化数控加工的3DS浏览器,可浏览3D场景中的所有信息,并可将CAD/CAM系统中复杂的三维零件实体导入该浏览器中.另外,该浏览器还可将各工步的数控代码以图形化格式贴合在所需加工工件的实体表面上,使本地数控机床操作者清晰识别异地所传各工步的数控代码.  相似文献   

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