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Stratigraphy of the MSGBC Basin in the Western Part of Thies by Pixelation and Website Simulation (Senegal, West Africa)

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Open Journal of Geology 2022年第9期12卷 685-705页

作者： Mohamadou Moustapha Thiam Moumar Dieye Adama Dione Abdoul Aziz Ndiaye Mapathé Ndiaye salimata ngom Raphaël Sarr Institut des Sciences de la Terre Université Cheikh Anta Diop Dakar Sénégal UFR Sciences de L’Ingénieur UIDT Thiès Sénégal

During this research work we developed another approach to digital mapping using the pixelation technic. This unprecedented digital mapping of the basin MSGBC in Senegal required the compilation of numerous geological data consisting of seismic lines and oil and hydraulic log reports. These spatial reference data include geological information from the surface to the top of the Campanian. The mapped terrains are composed of the Post-Paleocene Complex (PPC), the Paleocene, the Maastrichtian, and the Campanian. The nearest neighbor method has been used to establish the spatial distribution of the different geological formations. Histograms of values were used to determine the confidence intervals of the mapping. They were used to locate areas of low relative error and to apply the 3D digital mapping technique. For instance, Diender Guedj has been mapped at 1:25,000. The result of this mapping is extracted and processed using the DBMS (MySQL) software. The latter allowed both to determine Paleocene gab and update data. And then the database is processed. The programming languages PHP and Javascript have been used to simulate a website.

关键词： MSGBC Digital Mapping Pixelation Website Simulation

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Stratigraphy of the MSGBC Basin in the Western Part of Thies by Pixelation and Website Simulation (Senegal, West Africa)

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Open Journal of Geology（地质学期刊） 2022年第9期

作者： mohamadou moustapha thiam moumar dieye adama dione abdoul aziz ndiaye mapathé ndiaye salimata ngom raphaël sarr

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Modeling and Optimization of Interaction between Small Coastal Pelagic Fish, their Biological Predators and Fishermen

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Open Journal of Optimization 2021年第1期10卷 13-27页

作者： Ibrahima Diedhiou salimata Gueye Diagne Fambaye ngom Sow Coumba Diallo Diop Ndiaga Thiam Gabriel Birame Ndiaye Aissatou Fall Ndoye Gueye Cheikh Anta Diop University of Dakar (UCAD) Dakar Senegal Department of Mathematics and Computer Science (DMI) UCAD Dakar Senegal Oceanographic Research Center Dakar Thiaroye (CRODT) Dakar Senegal Direction of Maritime Fisheries (DPM) Dakar Senegal

Small coastal pelagic fish are one of the fish families most affected by sea fishing. This man-made phenomenon leads to an imbalance in the marine and coastal ecosystem and is one of the main causes of migration north and offshore of the ranges. We used the ordinary differential equations to model the interactions existing between small pelagic resources and fishermen. Modelling follows the same of the Lotka-Volterra equations with a difference in the number of variables. This study confirmed the instability of the marine ecosystem. The objective is first of all to model a system of three interacting individuals composed of two distinct types of predators and two types of prey, and then optimise this interaction with the aim of conserving biodiversity in the ecosystem under study. Determining the Jacobian matrix made it possible to calculate the reproduction rate basic (R0). The study of the strong connectedness has made it possible to reduce the number of variables without losing the objective of the study. A computer program implemented on the language computer python facilitated the visualisation of the results.

关键词： Small Coastal Pelagics Ordinary Differential Equations Modelling Optimisation Basic Reproduction Rate

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