MoritaContext的(I,k)-正则性

证明了若环T是具有一对零同态的Moritacontext环(A,B,M,N,ψ,(φ)),则有T/L(≌)A/I(+)B/J,其中L=(I,J,M,N)是环T的理想,I,J分别是A,B的理想;同时证明了一对具有零同态的Moritacontext环T=(A,B,M,N)是(L,k+l)-正则环,如果其中的环A和B分别是(I,k)-,(J,l)正则环,这里L=(I,J,M,N)是环T的理想,且任意给定的k,l∈N.     

Morita Context 的(I,k)-正则性

证明了若环T是具有一对零同态的Morita context环(A,B,M,N,ψ,φ),则有 T/LA/I⊕B/J,其中 L=(I,J,M,N)是环T的理想,I,J分别是A,B的理想;同时证明了一对具有零同态的Morita context环T=(A,B,M,N)是(L,k+l)-正则环,如果其中的环A和B分别是 (I,k)-,(J,l)-正则环,这里L=(I,J,M,N)是环T的理想,且任意给定的k,l∈N.      

关于(I,k)-正则环

给出了(I,k)-正则环的概念及其等价刻画,研究了它的性质,并对(I,k)-正则环和I-半π正则环之间以及(I,k)-正则环和(I,k+1)-正则环的关系进行了探究.     

鳍线滤波器的计算机辅助设计及研制

介绍了鳍线滤波器的设计原理，针对鳍线滤波器难以调节的弱点，运用微波电路CAD技术中的节点导纳法对其频响特性进行分折，从而有效避免了因重复加工造成的浪费。最后着重分折滤波器结构尺寸的最差对其频响特性的影响。这对研制过程具有一定的指导意义。     

从原始宗教信仰看布努瑶朴实的经济思想意识——都安县下坳乡加文村原始宗教经济思想意识调查

布努瑶的原始宗教信仰中蕴涵着特别强烈的朴实经济思想意识,生产劳动是他们信仰的主题,团结、勤劳是他们的美德。在目前恶劣的生存环境下,这种信仰核心仍是他们的精神支柱但需要把这种意识与现代经济思想有机结合起来才能创造出奇迹。     

关于(I,k)-正则环

给出了(I,k)-正则环的概念及其等价刻画,研究了它的性质,并对(I,k)-正则环和I-半π正则环之间以及(I,k)-正则环和(I,k+1)-正则环的关系进行了探究.     

5G Oriented Exponential Effective Signal to Interference plus Noise Ratio Mapping Algorithm Based on Channel Classification

In the future the fifth generation( 5 G) communication systems,channel models may be very complicated and it is difficult to calculate equivalent signal to interference plus noise ratio( SINR)of a random fading channel. Therefore,methods for the calculation of equivalent SINR of a random fading channel are very necessary.In this paper,an enhanced algorithm on the exponential effective SINR mapping( EESM) model for random fading channels was proposed. First, the optimal adjustment parameters of typical channel fading models including extended pedestrian A( EPA)model,extended vehicular A( EVA) model and extended typical urban( ETU) model were obtained by simulation. Then the proposed solution was used to actualize channel classification according to the maximum multipath delay and the average power of the random channel. The solution can determine the typical channel closest to random channel for obtaining the optimal adjustment value of EESM. The evaluation results indicate that the proposed one can improve the whole system throughput significantly and meanwhile the accuracy of the link prediction algorithm is also guaranteed.     

Study of Software Radio Receiver Development Platform

Introduction WiththeadventofhighspeedADCAD6640[1],programmabledigitaldown converterAD6620[2]andhigh speedDSPchipTMSC320C6701[3],anadvancedcomm unicationpattern softwareradioisbecomingmoreand moreperfect.Thesoftwareradiotakestheformofgen eral purposehardwaredevelopmentplatform,combining standardizedhardwaremodulesinthewayofbusarc hitecture,bymeansofdownloadingspecificsoftwareto performvariouskindsofcommunicationfunctions.Inan idealsoftwareradiosystem,receiverperformsA/D conversionontheR…     

一种用于频率合成器的双极型晶体管VCO的分析与设计

在VCO设计中，以确保稳定振荡和一定的调谐带宽为基本出发点，确定适当的电路组态。振荡器的电路拓扑以变容二极管为中心的电抗补偿网络作为调谐网络接于晶体管的基极，采用射极跟随的方式输出。在集电极端接一段开路微带线引入极间反馈，通过对极间反馈量的调整来实现帮助起振、变化功率和微调频率。