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Objective The control of PSD (platform screen doors) by signaling system is crucial for ensuring urban rail transit stable operation. The interface between the signaling system and the PSD system is equally important for the stable and efficient control of PSD. Therefore, it is necessary to conduct an in-depth analysis of this interface, comparing traditional relay interfaces with the new type of PSDC (platform screen door control) system interface, and to analyze the scheme of PSD direct control using PSDC interface. Method A detailed analysis of the system architecture using relay interfaces versus PSDC interface is provided. These interfaces are compared from equipment structure, information exchange, equipment maintenance, and operation-maintenance support perspectives. Based on the interface structures, the scheme of PSD direct control using PSDC interface is discussed. Result & Conclusion Compared to the relay interface, PSDC interface features faster communication speed, better security, and shorter information exchange process, presenting a comprehensive and intuitive display of equipment status and parameter changes with obvious advantages. The above-mentioned scheme reduces the need for intermediate devices to transmit the command and non-command information, facilitating centralized monitoring and management, and thereby enhancing operational efficiency.

The potential for rotor component shedding in rotating machinery poses significant risks, necessitating the development of an early and precise fault diagnosis technique to prevent catastrophic failures and reduce maintenance costs. This study introduces a data-driven approach to detect rotor component shedding at its inception, thereby enhancing operational safety and minimizing downtime. Utilizing frequency analysis, this research identifies harmonic amplitudes within rotor vibration data as key indicators of impending faults. The methodology employs principal component analysis (PCA) to orthogonalize and reduce the dimensionality of vibration data from rotor sensors, followed by k-fold cross-validation to select a subset of significant features, ensuring the detection algorithm's robustness and generalizability. These features are then integrated into a linear discriminant analysis (LDA) model, which serves as the diagnostic engine to predict the probability of rotor component shedding. The efficacy of the approach is demonstrated through its application to 16 industrial compressors and turbines, proving its value in providing timely fault warnings and enhancing operational reliability. [ABSTRACT FROM AUTHOR]

In frozen regions, especially metro tunnel portal sections, which are vulnerable to an externally low-temperature atmosphere, would lead to frozen damage affecting traffic safety. To clarify how the air temperature field at tunnel portal sections varies with periodically changing atmospheric temperature, a site test was conducted on Metro Line 1 in Hohhot in the Inner Mongolia Autonomous Region, and the basic heat transfer equation and principle of energy conservation were introduced to establish a basic theoretical model, which was compared with the results from other regions. By comparison with testing results in other regions, the theoretical model was essentially consistent with the variation rules of the tested temperature. Therefore, the research could theoretically direct the heat preservation and freeze prevention of key facilities and equipment in metro tunnel portal sections in frozen regions.