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Predicting Earth-Vas2 parameters of coastal plain sand aquifers using artificial neural Network(s), in the Calabar region of Nigeria
Názov Predicting Earth-Vas2 parameters of coastal plain sand aquifers using artificial neural Network(s), in the Calabar region of Nigeria Aut.údaje Emmanuel I. Akaerue ... [et al.] Autor Akaerue Emmanuel I. (35%)
Spoluautori Onwuka Obialo S.
George Anthony M.
Ekwok Stephen Eguba
Alarifi Saad S.
Andráš Peter 1953- (30%) UMBFP01 - Katedra geografie a geológie
Eldosouky Ahmed M.
Zdroj.dok. Journal of African Earth Sciences. No. 209 (2024), pp. 1-12. - Oxford : Elsevier Ltd., 2024 Kľúč.slová hydrogeológia - hydrogeology korelačné koeficienty Heslá geogr. Nigéria Jazyk dok. angličtina Krajina Veľká Británia Anotácia This study employs artificial neural networks (ANNs), specifically the Nonlinear Autoregressive with External Input (NARX) model as an ANN add-on for Matlab, to forecast Earth-Vas2 parameters. The model leverages a time series approach, with the Earth-Vas2 index (y(t)) as the predictive target and various parameters (eleva tions, static water level, aquifer material thickness, transmissivity, hydraulic conductivity, specific capacity, vadose media) denoted as x(t) to facilitate accurate predictions. The Levenberg-Marquardt training algorithm was applied to the ANN using geo-hydraulic data from 56 boreholes for training and 24 boreholes for validation and testing. Validation metrics such as mean square error (MSE), correlation coefficient (R), and coefficient of determination (R2 ) were utilized. The results indicate a high degree of accuracy, with low MSE values of 0.0171 (training), 0.0087 (validation), and 0.0327 (testing). Strong correlation coefficients (R) of 0.9882, 0.9898, and 0.9844, along with high R2 values (97.66%), emphasize the robustness of the ANN model. Actual and predicted Earth-Vas2 values exhibit a similar pattern, affirming the model’s effectiveness. The R-value of 0.9882 signifies a strong positive correlation within the model, validating its ability to capture variable interactions in fluid migration control. Geo-hydraulic Earth-Vas2 maps identify areas with varying migration efficiency, guiding groundwater management. The study emphasizes routine subsurface assessments for crucial data in environ mental planning and risk reduction in industrial and municipal activities. This method provides cost-effective estimation of key geo-hydraulic properties for aquifer vulnerability assessments, with far-reaching implica tions for groundwater management, environmental protection, and land use planning. URL Link na plný text Kategória publikačnej činnosti ADC Číslo archívnej kópie 54309 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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Názov Somatic characteristics, strength and sport result in 12-19-year-old pole vault jumpers Aut.údaje Klimczyk Mariusz, Cieślicka Mirosława, Szark Mirosława Autor Klimczyk Mariusz (60%)
Spoluautori Cieślicka Mirosława (20%)
Szark-Eckardt Mirosława (20%)
Zdroj.dok. Medical and biological sciences. Vol. 23, no. 3 (2009), pp. 53-60. - [s.l.] : Scientific Journals International, 2009 Kľúč.slová somatické charakteristiky športové výsledky starší školský vek - older school age skok do výšky Jazyk dok. angličtina Krajina Poľsko
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