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In order to fully extract the fault characteristics of different cavitation fault states of centrifugal pumps, reduce the influence of hyperparameter settings on the identification and classification results of machine learning algorithms, this paper designs a network model based on the rime optimization algorithm (RIME) to improve the stacked denoising autoencoder (SDAE) network, which is named as RIME-SDAE. First of all, Singular Value Decomposition (SVD) is used to denoise the X,Y and Z signals of the triaxial vibration sensor, and time-domain, frequency-domain and time-frequency features are extracted to construct a signal feature set. Secondly, the three-dimensional feature indicators are analyzed and selected to be merged into the input dataset, and SDAE is trained with the RIME is used to determine the model parameters of SDAE synchronously. The feasibility of the proposed method is verified by the signals collected in the actual test, and the test results show that the accuracy on the test set reaches more than 98 %. [ABSTRACT FROM AUTHOR]

Objective • This study is aimed to examine the correlation between the transitions in the muscular strength pre and post arthroscopic meniscus suture surgery. Methods • A total of 87 patients records were collected from the electronic medical records of the Second Affiliated Hospital of Soochow University from 2020 to 2021. Patients in the operative group underwent arthroscopic meniscus sutures. The isokinetic muscular strength test system (ISOMED2000) tool was utilized to examine the isokinetic intensity of the knee joins on both sides and the balance was marked and adjusted to the training methods before the test. The HSS score was used to assess the transitions in the knee activity. Results • There was a significant variation in the extensor muscle strength found on the affected portion where F value was observed at 3747.845 (P < .01). The extensor knee joint strength of the affected side was less than the healthy side when compared with pre-operation, one month, three months, and six months post-surgery where F values were found to be 5287.41, 5510.517, and 1947.91 respectively (P < .001). After six months of the surgery, there was an improvement in the isokinetic muscular strength of patients, where the measurement of the damaged side and the healthier side was observed as 89.11 ±6.78 and 93.45±5.59, respectively. Conclusion • Arthroscopic meniscus suture surgery is observed to have a superior influence on the treatments. After 6 months of surgery, the muscular force of the knee extensor on the affected joint portion enhanced remarkably in contrast to the other durations. [ABSTRACT FROM AUTHOR]