IMPROVING THE FORMULATION OF THE BASIC INTERREGIONAL INPUT-OUTPUT OPTIMIZATION MODEL OF RAIL TRANSPORT TO INCREASE ITS FLEXIBILITY IN EVALUATING LARGE-SCALE RAILWAY PROJECTS

2020 ◽  
Keyword(s):  
Optimization Model ◽  
Large Scale ◽  
Rail Transport ◽  
Input Output

Optimal Operation and Maintenance of Gas Compressor Stations: An Integrated Framework Applied to a Large-Scale Industrial Case

2015 ◽  
Vol 138 (4) ◽  
Author(s):  
Dionysios P. Xenos ◽  
Erling Lunde ◽  
Nina F. Thornhill
Keyword(s):  
Optimization Model ◽  
Large Scale ◽  
Optimal Schedule ◽  
Optimal Operation ◽  
Optimal Distribution ◽  
Compressor Station ◽  
Operational Costs ◽  
Operation And Maintenance ◽  
Maintenance Model ◽  
Operational Aspects

This paper presents a framework which integrates maintenance and optimal operation of multiple compressors. The outcome of this framework is a multiperiod plan which provides the schedule of the operation of compressors: the schedule gives the best decisions to be taken, for example, when to carry out maintenance, which compressors to use online and how much to load them. These decisions result in the minimization of the total operational costs of the compressors while at the same time the demand of the plant is met. The suggested framework is applied to an industrial gas compressor station which encompasses large multistage centrifugal compressors operating in parallel. The optimization model of the framework consists of three main parts: the models of compressor maps, the operational aspects of compressors, and a maintenance model. The results illustrate the optimal schedule for 90 days and an example of the optimal distribution of the load of the compressors for 5 days. Finally, the results show the economical benefits from the integration of maintenance and optimization.

Opportunities and Challenges in Porting a Parallel Code from a Tightly-Coupled System to the Distributed EU Grid, Enabling Grids for E-sciencE

2012 ◽  
pp. 197-217
Author(s):  
Fumie Costen ◽  
Akos Balasko
Keyword(s):  
Large Scale ◽  
Coupled System ◽  
The Other ◽  
Data Input ◽  
Final Solution ◽  
Input Output ◽  
Weak Point ◽  
Computational Environment ◽  
Tightly Coupled ◽  
Parallel Code

The computational architecture of Enabling Grids for E-sciencE is introduced as it made our code porting very challenging, and the discussion presented is directly applicable to EGEE users. The final solution to the code poring problem is proposed, and its performance is examined. The solution to this problem be generally faced in the other large scale computation and so is applicable to users of other HPC facilities. This chapter gives a hint to those who have difficulties in applications with heavy data Input/Output (I/O) under the computational environment whose weak point is the data I/O.

Optimization design of building isolation structure based on sustainable benefit analysis

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jia Wu
Keyword(s):  
Life Cycle ◽  
Optimization Model ◽  
Optimization Design ◽  
Large Scale ◽  
Building Materials ◽  
Cost Ratio ◽  
Benefit Analysis ◽  
Seismic Capacity ◽  
Content Type ◽  
Whole Life Cycle

PurposeThe study shows that with the progress of building technologies and building materials, the scale of buildings has increased. But in earthquake-prone areas, large-scale buildings mean higher risks; therefore improving the seismic capacity of buildings is an important measure to reduce the risk of buildings.Design/methodology/approachIn this study, the isolation structure of buildings was introduced briefly, and the cost-benefit based optimization model of the isolation structure was constructed. The optimization of the isolation structure was carried out from the perspective of benefit analysis. Then, two buildings with the same structure were analyzed as examples. One kept the original isolation structure, and the other optimized the isolation structure with the optimization model.FindingsThe final results showed that the optimized isolation structure had a lower input cost ratio, i.e. it had a higher benefit in the same whole life cycle, and the expected loss cost of the structure produced in the same life cycle was lower.Originality/valueIn conclusion, the optimization model of the isolated structure based on benefit analysis can effectively improve the benefit of building isolation structure produced in the whole life cycle.

scholarly journals Transport Routes Optimization Model Through Application of Fuzzy Logic

2018 ◽  
Vol 30 (1) ◽  
pp. 121-129 ◽  
Author(s):  
Ivan Bortas ◽  
Nikolina Brnjac ◽  
Čedomir Dundović
Keyword(s):  
Fuzzy Logic ◽  
Optimization Model ◽  
Research Study ◽  
Optimal Transport ◽  
Road Traffic ◽  
Negative Impact ◽  
Development Planning ◽  
Rail Transport ◽  
Transport Network ◽  
The European Union

The transport policy of the European Union is based on the mission of restructuring road traffic into other and energy-favourable transport modes which have not been sufficiently represented yet. Therefore, the development of the inland waterway and rail transport, and connectivity in the intermodal transport network are development planning priorities of the European transport strategy. The aim of this research study was to apply the scientific methodology and thus analyse the factors that affect the distribution of the goods flows and by using the fuzzy logic to make an optimization model, according to the criteria of minimizing the costs and negative impact on the environment, for the selection of the optimal transport route. Testing of the model by simulation, was performed on the basis of evaluating the criteria of the influential parameters with unprecise and indefinite input parameters. The testing results show that by the distribution of the goods flow from road transport network to inland waterways or rail transport, can be predicted in advance and determine the transport route with optimal characteristics. The results of the performed research study will be used to improve the process of planning the transport service, with the aim of reducing the transport costs and environmental pollution.

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