Method of building transformer acoustic diagnosis database based on multi physical field coupling modeling

In this paper, a method of building dynamic acoustic diagnosis database of dry-type transformer is proposed. The method is mainly combined with collecting the basic noise of transformer and simulating the acoustic signals of transformer under different working conditions to improve the fault database of transformer. Due to the incomplete working conditions on site, the simulated working conditions are relatively complete, and the marked acoustic signal file is generated, and then form the composition of the database. This paper focuses on the finite element simulation analysis of transformer vibration and noise radiation based on COMSOL, and the idea of establishing transformer biological diagnosis database. Improve the efficiency of transformer fault design and research, and provide reliable and convenient data services for researchers.

Revisiting the generic position and acoustic diagnosis of Odontophrynus salvatori (Anura: Odontophrynidae)

Herein we evaluate the phylogenetic position, and revisit the generic allocation of Odontophrynus salvatori, which has for long been considered controversial because it exhibits intermediate morphological features between Odontophrynus and Proceratophrys. By assessing a fragment of the 16S mitochondrial gene from topotypical specimens, we confirm that O. salvatori is a member of the genus Proceratophrys and sister to P. moratoi, also forming a clade with P. concavitympanum and P. ararype. Therefore, we formally transfer O. salvatori to the genus Proceratophrys [Proceratophrys salvatori (Caramaschi 1996) comb. nov.]. Additionally, the calls of Proceratophrys salvatori and P. moratoi, formally compared for the first time, are shown to exhibit similar structures: they both emit single multi-pulsed notes that differ mainly in pulse repetition rate and dominant frequency. Finally, we summarise occurrence records for P. salvatori and P. moratoi and provide a new record of P. moratoi in Mato Grosso State, extending its distribution about 490 km to the north-west.

Experience in using computer bronchophonography in paediatric practice

Thanks to the innovations in the information technology field, computer acoustic diagnosis is beginning to be used in the clinical practice. Computer bronchophonography is one of the promising domestic innovations in the field of methods of measuring the functional state of the respiratory system. This method can be used at any stage of medical care to identify bronchial obstruction, monitor the effectiveness of treatment and preventive measures in patients with bronchopulmonary diseases, which is especially important in early and preschool years. However, further research is required in this current field, both from research and practical perspectives. In the article, the authors present their own experience in using and interpreting the results of bronchophonography in children.