Category: Engineering

Evolution of the EBG-backed Archimedean spiral antenna

Figure 7 shows the four evolutionary stages of the Archimedean spiral antenna with a circular EBG reflector. Figure 7a depicts an Archimedean spiral antenna without a tapered balun or EBG…

Characterization of the joint pore structure of coal samples

Nitrogen adsorption and desorption curves

The low-temperature liquid nitrogen adsorption experimental results, as shown in Fig. 1, reveal that the nitrogen adsorption curves of all coal…

The superiority of the proposed model in this study is mainly verified through five parts of experiments. It includes data restoration experiments, different cluster methods comparison, TCN-Wpsformer model prediction comparison, ablation…

Hypervolume (HV)

“Let \({a}^{r}\)= \({({a}_{1}^{r},\dots ,\text{a})}^{T}\), be a inferior point dominated by all the Pareto optimal objective vectors. The HV of P is defined as the volume of the objective space dominated by solutions in P and…

Site information and crop selection

The site chosen for the study was the Faculty of Agriculture, Ain Shams University, Egypt (Fig. 1). The Faculty of Agriculture is one of the largest colleges in Egypt. It contains many educational,…

Model evaluation

The unlicensed PTW driver dataset is filtered for features using Boruta-Shap, resulting in an optimal subset of 10 accepted features. The accepted features include: PTW type, Unlicensed PTW driver age, Unlicensed PTW driver…

In this study, confusion matrix, precision, recall, F1-Score, mAP50 and mAP50-95 were selected as the key indicators to evaluate the performance of the improved Yolov8 object detection model. They can comprehensively reflect the performance of…

This paper utilizes MIMO millimeter-wave radar for monitoring vital signs in neonates. The transmitted signal is a stepped-frequency continuous wave (SFCW). The briefprocessing flow is illustrated in Fig. 2: Image recognition is employed to…

Investigation and analysis of ship navigating accidents

Ship navigation safety is crucial for ensuring the efficient, orderly, and stable operation of marine traffic. Analyzing ship navigation accident data provides valuable insights into the…

This study utilized polylactic acid (PLA), a widely employed biodegradable thermoplastic, for all 3D-printed specimens. An XYZ-“ULTIMAKER S5” 3D-printer equipped with a 0.4 mm nozzle was employed for the fabrication process. 3D-model slicing…