A New Method for Locating Positions of Single-Core Cables in Three-Phase Submarine Power Circuits Based on Phase Difference Data

The identification of submarine cable locations is crucial for their operation and maintenance. Precise location data enables the monitoring of route changes and facilitates rapid fault detection. Magnetic sensing is commonly used for detecting buried submarine cables. However, current research seldom discusses the impact of mutual magnetic field interference among submarine power cables on location accuracy and considers only the magnetic field intensity for cable detection. In this study, the authors first establish a general magnetic field model for three parallel single-core submarine power cables carrying three-phase currents and thoroughly investigate the variations in the amplitude and phase difference of the magnetic field surrounding the cables. Based on this model, the authors introduce a gradient measurement method based on the phase difference for the first time and compare its location accuracy with that of the traditional extremum method. Our findings reveal that the phase difference method offers higher location accuracy at longer detection distances, whereas the extremum method is preferable for shorter distances because of its simpler device and criteria

Morphological characteristics and phylogenetic evidence reveal two new species and the first report of Comoclathris (Pleosporaceae, Pleosporales) on dicotyledonous plants from China

Two novel Comoclathris species were identified from dicotyledonous plants (Clematis sp. and Xanthoceras sorbifolium) in China. The results were supported by morphological characters and Maximum Likelihood (ML) and Bayesian Inference (BI) analyses. Multi-gene phylogenetic analyses of the ITS, LSU, SSU and rpb2 sequences revealed two new species Comoclathris clematidis and C. xanthoceratis, which are phylogenetically distinct. The new species are phylogenetically closely related to C. arrhenatheri. However, they are distinguishable from C. arrhenatheri by having comparatively larger asci and ascospores. This study improves our knowledge of Comoclathris as no species has been previously described from China. This suggests such taxa may be rare and it is likely that new taxa will be discovered from hosts and environments that have not yet been extensively investigated

Synopsis of Leptosphaeriaceae and Introduction of Three New Taxa and One New Record from China

Leptosphaeriaceae, a diverse family in the order Pleosporales, is remarkable for its scleroplectenchymatous or plectenchymatous peridium cells. Four Leptosphaeriaceae species were discovered and studied during the investigation of saprobic fungi from plant substrates in China. Novel taxa were defined using multiloci phylogenetic analyses and are supported by morphology. Based on maximum likelihood (ML) and Bayesian inference (BI) analyses, these isolates represent three novel taxa and one new record within Leptosphaeriaceae. A new genus, Angularia, is introduced to accommodate Angularia xanthoceratis, with a synopsis chart for 15 genera in Leptosphaeriaceae. This study also revealed a new species, Plenodomus changchunensis, and a new record of Alternariaster centaureae-diffusae. These species add to the increasing number of fungi known from China