E_k/M/n/N→M^{（x）}/M/c Queuing Model Of Study

This article is M^{（X）}/M/c→（M）/M/n/Kon the basis of improved.Class I service systemcapacity limit for the first time.For the study of the model is expanded from four.First,the key is the Q-matrix system smooth the necessary and sufficient conditions for itsstate of the process is given. Second,due to limitations on Class I systems,mainlystudies E_K/M/n/N Mixed-mode queuing system and E_K/M/n/n queuing system.Given some calculates of target parameters to these queuing model.Besides,to M^{（X）}/M/1and M^{（X）}/M/cqueuing system of studies,wo can getⅡservice system the busy perioddistribution and service finished its busy period the number of customers,Finally,toE_K/M/n/N→M^{（X）}/M/cof studies get wait time.