Multi-objective optimization of data deployment and scheduling based on the minimum cost in geo-distributed cloud

Author(s):  
Tianxing Xie ◽  
Chunlin Li ◽  
Na Hao ◽  
Youlong Luo
Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 811 ◽  
Author(s):  
Yongmao Xiao ◽  
Qingshan Gong ◽  
Xiaowu Chen

The blank’s dimensions are an important focus of blank design as they largely determine the energy consumption and cost of manufacturing and further processing the blank. To achieve energy saving and low cost during the optimization of blank dimensions design, we established energy consumption and cost objectives in the manufacturing and further processing of blanks by optimizing the parameters. As objectives, we selected the blank’s production and further processing parameters as optimization variables to minimize energy consumption and cost, then set up a multi-objective optimization model. The optimal blank dimension was back calculated using the parameters of the minimum processing energy consumption and minimum cost state, and the model was optimized using the non-dominated genetic algorithm-II (NSGA-II). The effect of designing blank dimension in saving energy and costs is obvious compared with the existing methods.


2017 ◽  
Vol 2 (3) ◽  
pp. 74-79
Author(s):  
Ahmed Badri Muslim Fanfakhri ◽  
Ali Yakoob Yousif ◽  
Esraa Alwan

In this paper, new multi-objective optimization algorithm is proposed. It optimizes the execution time, the energy consumption and the cost of booked nodes in the grid architecture at the same time. The proposed algorithm selects the best frequencies depends on a new optimization function that optimized these three objectives, while giving equivalent trade-off for each one. Dynamic voltage and frequency scaling (DVFS) is used to reduce the energy consumption of the message passing parallel iterative method executed over grid. DVFS is also reduced the computing power of each processor executing the parallel applications. Therefore, the performance of these applications is decreased and so on the payed cost for the booking nodes is increased.  However, the proposed multi-objective algorithm gives the minimum energy consumption and minimum cost with maximum performance at the same time. The proposed algorithm is evaluated on the SimGrid/SMPI simulator while running the parallel iterative Jacobi method. The experiments show that it reduces on average the energy consumption by up to 19.7 %, while limiting the performance and cost degradations to 3.2 % and 5.2 % respectively.


2018 ◽  
Vol 7 (3) ◽  
pp. 1552
Author(s):  
S Surender Reddy

A novel approach to solve multi-objective optimization (MOO) problem which aims at minimizing fuel cost, emission release and real power loss of the system simultaneously has been proposed in this paper. Conventional minimum cost operation cannot be the only basis for generation dispatch; emission release minimization and loss minimization must also be taken care of. Power system must be operated in such a way that both active and reactive powers are optimized simultaneously. Reactive powers should be optimized to provide better volt-age profile as well as to reduce system losses. In this paper, the proposed multi-objective optimal power flow (MO-OPF) problem is solved using particle swarm optimization (PSO) and Fuzzy satisfaction maximization approach. In this paper, it is assumed that the decision maker has imprecise or fuzzy goals of satisfying all the objectives, and the proposed problem is thus formulated as a fuzzy satisfaction maximization problem which is basically a min-max problem. It is an efficient technique to obtain trade-off solution for the proposed optimization problem. The MO-OPF problem is tested on IEEE 30 bus, 6 generator system. The obtained results are found to be effective for the MO-OPF problem.  


2017 ◽  
Vol 10 (5) ◽  
pp. 371
Author(s):  
Arakil Chentoufi ◽  
Abdelhakim El Fatmi ◽  
Molay Ali Bekri ◽  
Said Benhlima ◽  
Mohamed Sabbane

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