At the 8th National Congress of the CAS Membership, 10 foreign scholars were elected into the second batch of CAS members with foreign nationalities because of their high academic prestige and indelible contributions ...At the 8th National Congress of the CAS Membership, 10 foreign scholars were elected into the second batch of CAS members with foreign nationalities because of their high academic prestige and indelible contributions to Chinese S&T cause. The namelist is arranged in the alphabetical order. Robert W. Cahn, of British nationality. He is one of world-renowned metallurgists today and noted for his creative work in the fields of recovery,recrystallization, intermetallic compounds and metallic glasses. So far he has some 200 research papers to his credit. In addition, he co-edited with Prof. P. Haasen a monograph Physical Metallurgy, now in its fourth edition, winning him world-wide renown. Also, he initiated and edited (or展开更多
The two-stage tandem queueing system M(z)/M/c→/PH(r)/1/K is studied in this paper. Customers arrive at stage-Ⅰ system in batches according to a Poisson process, and the size of the batch, x , is a r. v. within a ran...The two-stage tandem queueing system M(z)/M/c→/PH(r)/1/K is studied in this paper. Customers arrive at stage-Ⅰ system in batches according to a Poisson process, and the size of the batch, x , is a r. v. within a range of a finite number of positive integers. The stage- Ⅱ ststem has finite capacity, where customers are served in batches with a PH-distribution and the size of the batch is a positive integer r. Only after served in stage- Ⅰ system, and then served in stage- Ⅱ system, can the customers depart from the whole system. Several definitions such as the stage- Ⅰ service blocked time, the first-class and the second-class batch waiting times, and the batch sojourn time are introduced, and their distributions are obtained respectively.展开更多
文摘At the 8th National Congress of the CAS Membership, 10 foreign scholars were elected into the second batch of CAS members with foreign nationalities because of their high academic prestige and indelible contributions to Chinese S&T cause. The namelist is arranged in the alphabetical order. Robert W. Cahn, of British nationality. He is one of world-renowned metallurgists today and noted for his creative work in the fields of recovery,recrystallization, intermetallic compounds and metallic glasses. So far he has some 200 research papers to his credit. In addition, he co-edited with Prof. P. Haasen a monograph Physical Metallurgy, now in its fourth edition, winning him world-wide renown. Also, he initiated and edited (or
基金This paper is supported by the National Natural Science Foundation of China
文摘The two-stage tandem queueing system M(z)/M/c→/PH(r)/1/K is studied in this paper. Customers arrive at stage-Ⅰ system in batches according to a Poisson process, and the size of the batch, x , is a r. v. within a range of a finite number of positive integers. The stage- Ⅱ ststem has finite capacity, where customers are served in batches with a PH-distribution and the size of the batch is a positive integer r. Only after served in stage- Ⅰ system, and then served in stage- Ⅱ system, can the customers depart from the whole system. Several definitions such as the stage- Ⅰ service blocked time, the first-class and the second-class batch waiting times, and the batch sojourn time are introduced, and their distributions are obtained respectively.
