Mathematical Model and Performance Evaluation of AMI Applied to Mobile Environment

2016 ◽  
pp. 127-142 ◽  
Author(s):  
Shunsuke Matsuzawa ◽  
Satoru Harada ◽  
Kazuya Monden ◽  
Yukihiro Takatani ◽  
Yutaka Takahashi
Keyword(s):  
Mathematical Model ◽  
Performance Evaluation ◽  
Mobile Environment ◽  
And Performance

A Mathematical Model for Integrated Green Healthcare Supply Network Design

2021 ◽  
Vol 8 (1) ◽  
pp. 58-86
Author(s):  
Meisam Nasrollahi ◽  
Mehdi Safaei ◽  
Nooshin Mahmoodi
Keyword(s):  
Mathematical Model ◽  
Performance Evaluation ◽  
Network Design ◽  
Pareto Front ◽  
Performance Metrics ◽  
Heuristic Algorithms ◽  
Programming Model ◽  
Solution Algorithm ◽  
Supply Network ◽  
And Performance

This research presents a novel integrated mathematical programming model for green healthcare supply network design. A multi-graph integrated supply network was designed to meet real-world situations. Minimizing total cost and minimizing delivery time are considered as the objective functions. Since the considered problem is np-hard and the presented mathematical model is very complex and highly constrained, an innovative non-dominated ranked genetic algorithm (NRGA) called M-NRGA is developed to solve the real word problems. Three different selection procedures were implemented to improve the quality and diversity of solutions in the Pareto-front resulted from M-NRGA. Several numerical examples and a case study are solved to validate the model and performance evaluation of the solution algorithm. Four different performance metrics are implemented for performance evaluation of the solution algorithm. The quality of resulted solutions, the diversity of the solutions in the Pareto front are calculated for evaluation. The results are compared with two other meta-heuristic algorithms.

Simulation and Performance Evaluation of Finned Tube Gas Cooler for Trans-Critical CO2 Refrigeration System

2013 ◽  
Vol 281 ◽  
pp. 324-328 ◽  
Author(s):  
Dileep Kumar Gupta ◽  
Mani Shankar Dasgupta
Keyword(s):  
Carbon Dioxide ◽  
Mathematical Model ◽  
Performance Evaluation ◽  
Cost Effective ◽  
Finned Tube ◽  
Refrigeration System ◽  
Air Velocity ◽  
Time Performance ◽  
And Performance

Carbon dioxide is one of the rediscovered sustainable options, as CFCs and HFCs are now in the list of regulated substances, to be phased out in time bound way. There are however various challenges to the successful use of CO2 as refrigerant. Cost effective and widely acceptable technology is demand of the time. Performance of trans-critical CO2 refrigeration systems is found to be sensitive to the gas cooler design. In the present work a detailed mathematical model is developed for a finned tube air cooled gas cooler and the same is validated using published literature. Subsequently, to achieve the lowest possible approach temperature, the performance of the gas cooler is analyzed for various air velocity and alternate pipe arrangements. The effect of increase in size of gas cooler to its performance is also studied.

scholarly journals Modelling and performance evaluation of optical burst switched node with deflection routing and dynamic wavelength allocation

2008 ◽  
Vol 21 (2) ◽  
pp. 183-194 ◽  
Author(s):  
Danka Pevac ◽  
Risto Bojovic ◽  
Ivana Petrovic
Keyword(s):  
Mathematical Model ◽  
Performance Evaluation ◽  
Blocking Probability ◽  
Traffic Intensity ◽  
Control Logic ◽  
Deflection Routing ◽  
Wavelength Allocation ◽  
Offset Time ◽  
And Performance ◽  
The Mathematical Model

In this paper the effect of dynamic wavelength allocation (DWA) scheme implementation to the OBS node performance is investigated. We have developed the mathematical model of an OBS node in order to evaluate the burst blocking probability. It is proposed to allocate a part of total wavelength capacity to be used by deflected bursts only. The results obtained from the model show that if the number of allocated wavelengths is dynamically adapted to the deflected burst traffic intensity, the total blocking probability and deflected burst blocking probability significantly decrease. Concerning to the hardware requirements the implementation of deflection routing needs the limited optical FDL buffer incorporation, to provide the deflected burst with the extra offset time. Also, control logic for burst scheduler needs to be upgraded to perform the dynamic wavelength allocation for deflected bursts. .

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