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Model Driven Engineering (MDE) Tools: A Survey
Moujtahid Soukaina,
Belangour Abdessamad,
Marzak Abdelaziz
Issue:
Volume 3, Issue 2, June 2018
Pages:
29-33
Received:
19 July 2018
Accepted:
20 August 2018
Published:
13 September 2018
Abstract: Model Driven Engineering (MDE) is a new discipline in software engineering that advocates the massive use of models throughout the software development process. The emergence of this discipline has been accompanied by the prosperity of the tools that support it. On the long run, switching to MDE can be beneficial in case the process works, and the process itself depends on the tools. Since the transition is expensive, it is important to invest wisely, and choose the right tool. However, only recently tool creators have started considering metamodeling as an important issue in their list of concerns and university prototypes are sometimes difficult to download and test, so these tools remain little known overall and need to be listed. The aim of this article is to determine the strengths and weaknesses of the support that each of these MDE tools offer to the developer’s tasks, in order to learn to identify the right tool that meets the specific needs of the software engineer, without recommending any particular tool or vendors: It will present a significant number of the most popular MDE tools, in order to keep this paper simple, list some criteria for comparing these tools and evaluate them against those criteria.
Abstract: Model Driven Engineering (MDE) is a new discipline in software engineering that advocates the massive use of models throughout the software development process. The emergence of this discipline has been accompanied by the prosperity of the tools that support it. On the long run, switching to MDE can be beneficial in case the process works, and the ...
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A Study of Sandstone Permeability Anisotropy Through Fractal Concept
Yosaphat Sumantri,
Pudji Permadi
Issue:
Volume 3, Issue 2, June 2018
Pages:
34-45
Received:
8 August 2018
Accepted:
28 August 2018
Published:
12 October 2018
Abstract: Most correlation equations of rock permeability are usually based on the Euclidean geometry concept. Pore geometry and structure of most porous rocks are very complex, therefore non-Euclidean geometry concept, e.g. fractal theory, is needed to handle such a complexity. This paper presents a new equation for sandstone permeability involving other properties and fractal dimensions of pore space and surface. The equation is derived by combining Newton’s Law of viscosity, Darcy equation, and fractal geometry concept. It is shown that parameters such as tortuosity, internal surface area, and shape factor can be replaced by fractal dimensions. As natural porous media are mostly anisotropic, this study enables us to identify factors that affect the anisotropy. Eighteen sandstone samples with porosity and permeability range from 21 to 37% and 2.76 to 3,644 millidarcies, were employed in this study. The pore space and surface fractal dimensions for each orthogonal direction for each sample was determined by box counting method. The results of this study demonstrate that calculated directional permeability of the high permeability samples is very close to the measured one after corrections were made for pore sizes of less than one micron. This finding suggests that micropores of the samples may be a major factor not contributing to fluid flow. For the low and medium permeability samples, however, an additional pore geometrical correction is needed. The additional correction factor is considerably different for different directions of fluid flow, indicating that the anisotropy is due to the difference in directional pore structural characteristics.
Abstract: Most correlation equations of rock permeability are usually based on the Euclidean geometry concept. Pore geometry and structure of most porous rocks are very complex, therefore non-Euclidean geometry concept, e.g. fractal theory, is needed to handle such a complexity. This paper presents a new equation for sandstone permeability involving other pr...
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Development of Four-Zone Segmented Transitional Model for Reciprocating Internal Combustion Engine Analysis Using Gasoline
Ademola Adebukola Dare,
Olanrewaju Bilikis Olatunde
Issue:
Volume 3, Issue 2, June 2018
Pages:
46-52
Received:
22 April 2018
Accepted:
28 August 2018
Published:
19 October 2018
Abstract: A four zone model based on the first law of thermodynamics has been developed for analysis of combustion in an internal combustion engine. The four zones included an unburned zone and two regions of burned zone, (namely burned gas1 and burned gas 2) and unburned burned zone described as a transitory zone which is a mixture of burned and unburned gases. Arbitrary constant for each of burn (CC2) and unburned (CC1) zone leakages in unburned burned zone was evaluated at optimally predetermined values of 0.005 and 0.00025 respectively, while mass fraction burned from burned gas1, x1 and burned gas 2, x2 were also evaluated at predetermined optimal values of 0.6 and 0.4 respectively. The model was used to analyse an SI engine operating with a gasoline fuel. The engine operating conditions were set at engine speed of 2000 rpm, -35bTDC ignition time and burn duration at 60°. The temperature distribution from the arbitrary constants (CC2, CC1, x1 and x2) for the newly developed four zone model was compared to the two zone model and literature experimental temperature value. The obtained indicated mean effective pressure (IMEP), thermal efficiency (η), cylinder pressure and emission characteristics from the developed model and those of two zone analysis were both compared with literature values.
Abstract: A four zone model based on the first law of thermodynamics has been developed for analysis of combustion in an internal combustion engine. The four zones included an unburned zone and two regions of burned zone, (namely burned gas1 and burned gas 2) and unburned burned zone described as a transitory zone which is a mixture of burned and unburned ga...
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