Operational fault states in railways

Operational axioms for diagonalizing states

In quantum theory every state can be diagonalized, i.e. decomposed as a convex combination of perfectly distinguishable pure states. This elementary structure plays an ubiquitous role in quantum mechanics, quantum information theory, and quantum statistical mechanics, where it provides the foundation for the notions of majorization and entropy. A natural question then arises: can we reconstruct...

Operational Fault Tolerance of CMAC Networks

The performance sensitivity of Albus' CMAC network was studied for the scenario in which faults are introduced into the adjustable weights after training has been accomplished. It was found that fault sensitivity was reduced with increased generalization when "loss of weight" faults were considered, but sensitivity was increased for "saturated weight" faults.

Operational fault diagnosis of manufacturing systems

Among all kinds of possible faults in a manufacturing system, operational faults occur most often (about 70%). Efficient diagnosis of these faults is critical for improving the availability and productivity of the manufacturing system. This paper presents a hierarchical diagnosis model based on fault tree analysis and two other diagnosis models respectively based on the logic and sequential con...

Railroad Operational Performance in the United States

Wavelet Entropy-Based Traction Inverter Open Switch Fault Diagnosis in High-Speed Railways

Keting Hu 1,2, Zhigang Liu 1,2,* and Shuangshuang Lin 1,2 1 Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China; [email protected] (K.H.); [email protected] (S.L.) 2 School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China * Correspondence: [email protected]....