FAULT DIAGNOSIS OF ROLLING BEARINGS BASED ON SDP AND IMPROVED SAM⁃MobileNetv2 by ZHANG TianYuan, SUN HuEr, ZHU JiYang, ZHAO Yang

“…Traditional fault diagnosis methods for rolling bearings are difficult to accurately and efficiently achieve fault classification.A method of rolling bearing fault classification based on symmetrized dot pattern(SDP)and improved SAM⁃MobileNetv2 was proposed.Firstly,the bearing vibration signal was transformed into two⁃dimensional images with rich characteristic information by SDP algorithm.Secondly,the two⁃dimensional images were fed into the SAM⁃MobileNetv2 network model,which extracted and classified fault feature information.Improved SAM⁃MobileNetv2 networks used the adaptive activation function ACON to replace the ReLU6 activation function in SAM⁃MobileNetv2 to improve model classification performance.Finally,this model was compared with various models.The experimental results show that this model can accurately and efficiently realize the classification of rolling bearing faults,using Case Western Reserve University bearing fault data with an accuracy rate of 99.5%,using the University of Ottawa bearing failure data with an accuracy rate of 97.2%.…”
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Multiple-Stream Models for a Single-Modality Dataset with Fractal Dimension Features by Yen-Ching Chang

“…However, feature engineering can be regarded as an important supplement to DL, especially when using small datasets with rich characteristics. This study aims to utilize limited existing resources to improve the overall performance of the considered models. …”
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Geochronology and geochemistry of late Paleozoic volcanic rocks in eastern Inner Mongolia and their geological significance by Tianyi Liang, Mengmeng Li, Li Wang, Guanhong Wang, Xinglong Tang, Zhuang Li

“…The results indicate that the aluminum content of trachyandesite is relatively high, and the calcium and magnesium content is higher than that of rhyolite tuff, showing a sodium-rich characteristic. It is a quasi-aluminum peraluminous rock, and the europium anomaly is not obvious. …”
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Spatial Differentiation and Correlation of Ecological Stoichiometric Characteristics of Cynodon dactylon and Soil in the Water-level Fluctuation Zone of the Three Gorges Reservoir... by XU Liwen, ZHANG Yuewei, JIAN Chen, ZHANG Yuanyuan, WANG Xiaofeng

“…[Results] 1) The soil in the WLFZ associated with C. dactylon demonstrated a distinct “nitrogen-poor and phosphorus-rich” characteristic with significant spatial variations in nutrient contents and stoichiometric ratios. …”
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