http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Dadang Mohamad,Alim Al Ayub Ahmed,Gunawan Widjaja,Tawfeeq Alghazali,John William Grimaldo Guerrero,Irina Fardeeva,Alireza Hasanzadeh Kalajahi 대한산업공학회 2021 Industrial Engineeering & Management Systems Vol.20 No.4
The problem studied in this paper is the p hub center and the network structure is hierarchical and in three levels; where level one is for demand nodes, level two is for hub nodes, and level three is for central hubs. Central hubs have a complete network and hubs in the network have the capacity constraint. Given that the issue under consideration is for the purpose of transporting perishable goods, Such problems are often used in transportation systems in which customer response time is of great importance and sensitivity; Therefore, the objectives of the proposed model are to find the best location for hubs in the network as well as the best allocation of nodes to hubs so that network transportation costs are reduced and the maximum travel time between each pair of origin destination nodes is minimized. To evaluate the model, a numerical example with CAB dataset is introduced and to review and analyze the results, GAMS software with CPLEX solver is used. The results show that the discount coefficient of central hubs compared to the discount coefficient of second level hubs has the greatest impact on the cost of transportation and travel time.
Alim Al Ayub Ahmed,Dinh Tran Ngoc Huy,Nguyen Dinh Trung,Tawfeeq Alghazali,Abdulhussien N. Alattabi,Hasan Sh. Majdi,Farkad A. Lattieff,Ahmad Syarief Iskandar,Anis Siti Nurrohkayati 대한산업공학회 2022 Industrial Engineeering & Management Systems Vol.21 No.3
There are four general ways to improve reliability. One of the most popular of these solutions is to add surplus com-ponents to the subsystems of a system (known as RRAP) and the reliability-redundancy allocation problem. In a sub-system, how these surplus components are used is of particular importance. How to use surplus components in the subsystem is known as. There are three general strategies for reliability issues known as active, stored, and mixed strategy. The main aim of the study is to create a new formula on the basis of the subsystems that use these two strategies. Model 4 provides a continuous limit of the Markov chain with continuous time. This new formula enables us to perform complex strategy calculations in a very short time and accurately. Finally the exact function obtained for mixed strategy Protective system ultra-fast gas turbine has been tested. Given the results, the new equation decreased the solution time besides the accurate estimation of the system’s reliability.