ZTE Corporation announced on July 14, 2010 that it has been positioned in the leaders quadrant in Gartner＇s Magic Quadrant for Softswitch Architecture Report.
Positive trend followers achieve the result with half efforts and negative trend followers achieve half the result with doubled efforts; while positive trend leaders, enjoy all the resources. Confronting with shrinkin...Positive trend followers achieve the result with half efforts and negative trend followers achieve half the result with doubled efforts; while positive trend leaders, enjoy all the resources. Confronting with shrinking market due to global展开更多
Cardiac resynchronization therapy （CRT） is an effective treatment for heart failure patients with severely obvious left ventricular ejection fraction （LVEF） and evidence of cardiac dyssynchrony.1-3 With convention...Cardiac resynchronization therapy （CRT） is an effective treatment for heart failure patients with severely obvious left ventricular ejection fraction （LVEF） and evidence of cardiac dyssynchrony.1-3 With conventional biventricular stimulation,notable left ventricular （LV） reverse remodeling,the most reliable predictor of long-term survival in CRT patients,is achieved in only 60%-70% of the patients.4,5 Lack of LV dyssynchrony,non-optimal position of the LV pacing lead,high-myocardial scar burden,and sub-optimal device programming have been related to non-response to CRT.6-8 Particularly,the optimal placement of LV lead in a tributary of the coronary sinus is one of the most challenging technique of CRT device implantation.This article will discuss the effect of ventricular leads on the clinic outcome after CRT and how to locate the optimal ventricular leads to maximize the haemodynamic benefits of CRT and provide superior longterm outcome.展开更多
We consider a continuous review perishable （s,S） inventory system with a service facility consisting of a waiting hall of finite capacity and a single server. We assume two types of customers, ordinary and negative,...We consider a continuous review perishable （s,S） inventory system with a service facility consisting of a waiting hall of finite capacity and a single server. We assume two types of customers, ordinary and negative, arrive according to a Markovian Arrival Process （MAP）. An ordinary customer joins the queue and a negative customer instead of joining the queue removes one ordinary customer from the queue. The removal rule adopted in this paper is RCE （removal of a customer from the end）. The individual customer＇s unit demand is satisfied after a random time of service which is assumed to have a phase-type distribution. The life time of each item and the lead time of the reorders have been assumed to be independent exponential distributions. The joint probability distribution of the number of customers in the system and the inventory level is obtained for the steady state case. Various stationary system performance measures are computed and the total expected cost rate is calculated. The results are illustrated numerically.展开更多
文摘ZTE Corporation announced on July 14, 2010 that it has been positioned in the leaders quadrant in Gartner＇s Magic Quadrant for Softswitch Architecture Report.
文摘Positive trend followers achieve the result with half efforts and negative trend followers achieve half the result with doubled efforts; while positive trend leaders, enjoy all the resources. Confronting with shrinking market due to global
基金This project was supported a grant from the National Natural Science Foundation of China （No. 81200137）.
文摘Cardiac resynchronization therapy （CRT） is an effective treatment for heart failure patients with severely obvious left ventricular ejection fraction （LVEF） and evidence of cardiac dyssynchrony.1-3 With conventional biventricular stimulation,notable left ventricular （LV） reverse remodeling,the most reliable predictor of long-term survival in CRT patients,is achieved in only 60%-70% of the patients.4,5 Lack of LV dyssynchrony,non-optimal position of the LV pacing lead,high-myocardial scar burden,and sub-optimal device programming have been related to non-response to CRT.6-8 Particularly,the optimal placement of LV lead in a tributary of the coronary sinus is one of the most challenging technique of CRT device implantation.This article will discuss the effect of ventricular leads on the clinic outcome after CRT and how to locate the optimal ventricular leads to maximize the haemodynamic benefits of CRT and provide superior longterm outcome.
文摘We consider a continuous review perishable （s,S） inventory system with a service facility consisting of a waiting hall of finite capacity and a single server. We assume two types of customers, ordinary and negative, arrive according to a Markovian Arrival Process （MAP）. An ordinary customer joins the queue and a negative customer instead of joining the queue removes one ordinary customer from the queue. The removal rule adopted in this paper is RCE （removal of a customer from the end）. The individual customer＇s unit demand is satisfied after a random time of service which is assumed to have a phase-type distribution. The life time of each item and the lead time of the reorders have been assumed to be independent exponential distributions. The joint probability distribution of the number of customers in the system and the inventory level is obtained for the steady state case. Various stationary system performance measures are computed and the total expected cost rate is calculated. The results are illustrated numerically.
