2 research outputs found
Impact of hyperparameter tuning on hybridised convolutional neural networks for pathloss modelling in mobile communication systems
No full textThe performance of machine learning models, particularly Convolutional Neural Networks (CNNs), is profoundly influenced by effective hyperparameter tuning. However, a comprehensive understanding of how these hyperparameters affect the predictive accuracy of CNN-based pathloss models has not been adequately carried out. This study explores the role of hyper-parameter tuning in a hybridised CNN architecture that integrates DenseNet121 and ResNet50 to enhance pathloss prediction in mobile network environments. Field measurements were conducted along strategically selected urban and suburban routes in Ilorin, Kwara State, Nigeria. The results revealed the critical influence of key hyperparameters, such ashidden layers, batch size, training epochs, and computational efficiency, on model performance. Initially, with only two (2) hidden layers, the model showed suboptimal predictive accuracy, characterised by an MAE of 25.15, a MSE of 34.43, and a highly negative R² value of 6.01. However, increasing the hidden layers to seventeen(17) yielded a substantial improvement, with the MAE reducing to 2.08, the MSE decreasing to 7.35, and the R² shifting positively to 0.80. Further analysis of batch sizes revealed that smaller sizes resulted in poor model performance, increasing it to 8 significantly enhanced accuracy. Additionally, an increase in training epochs from 50 to 200 led to a marked reduction in prediction errors, albeit at the expense of extended training time per iteration. These findings underscore the pivotal role of strategic hyperparameter selection in optimising CNN-based pathloss modelling, offering valuable insights for enhancing predictive performance in mobile network systems
Pontosítási kísérlet a keresztény magyar királyság megalapításáról
No full textIn the time of iconoclasm the papacy lost its ecclesiastical supremacy over the former Illyria Prefecture (Dalmatia, Moesia and Pannonia provinces) against Byzantium. After the Avar Empire was overthrown Pannonia was partitioned by Charles the Great between three dioceses (Salzburg, Passau and Aquileia). In hope of getting back the papal jurisdiction over the area Pope Hadrian II renewed the chair of the diocese of Sirmium by placing St Method there. All of this was ended by the conquest of the Hungarians. Further conflict in the theme is provoked by Pope Benedict XII in 963 by consecrating here Zacheus as the archbishop of the Hungarians, but his work was crossed by Otto I. After the marriage of prince Géza the Byzantine Church got a head start in the area ruled by him. So the German Roman emperor and his priest took steps in the converting and submitting of Hungarians to catholic (roman rites). The resignation of Otto III about ecclesial legal claim over Pannonia brought a big turn, so that Ascherius abbot could be consecrated the archbishop of Sirmium and it was the turn of establishing the independent Hungarian diocese with the primacy of Esztergom and Stephen I was crowned in the end of the 1000th year. Hereafter the author is trying to render the beginning of the worship of Stephen I, the making of the Hungarian saint crown in the age of Kálmán and the origin of the relating thesis
