Abstract: The present disclosure relates to systems, methods, and computer readable media for detecting periodic sequences of events. A computer-implemented method may include collecting processing times and values associated with each of a plurality of events. The method may also include assigning each of the plurality of events to at least one of a plurality of time phases, the plurality of time phases forming a period characteristic of the plurality of events. The method may also include grouping the events in each of the plurality of time phases into one or more clusters, based on the respective values associated with the events. The method may also include determining a periodic sequence of events based on the one or more clusters. The method may further include recording the periodic sequence of events in a database of periodic sequences.

Abstract: The present disclosure relates to systems, methods, and computer readable media for detecting periodic sequences of events. A computer-implemented method may include collecting processing times and values associated with each of a plurality of events. The method may also include assigning each of the plurality of events to at least one of a plurality of time phases, the plurality of time phases forming a period characteristic of the plurality of events. The method may also include grouping the events in each of the plurality of time phases into one or more clusters, based on the respective values associated with the events. The method may also include determining a periodic sequence of events based on the one or more clusters. The method may further include recording the periodic sequence of events in a database of periodic sequences.

Abstract: Use of a selectively conducting anode component in solid polymer electrolyte fuel cells can reduce the degradation associated with repeated startup and shutdown, but can also adversely affect a cell's tolerance to voltage reversal along with its performance. It was shown that these adverse affects can be mitigated against in certain ways. However, improved results can be obtained by employing a selectively conducting component which comprises a mixed layer of a selectively conducting material and carbon. The mixed layer contacts the side of the anode opposite the solid polymer electrolyte.

Abstract: Use of a selectively conducting anode component in solid polymer electrolyte fuel cells can reduce the degradation associated with repeated startup and shutdown, but can also adversely affect a cell's tolerance to voltage reversal along with its performance. It was shown that these adverse affects can be mitigated against in certain ways. However, improved results can be obtained by employing a selectively conducting component which comprises a mixed layer of a selectively conducting material and carbon. The mixed layer contacts the side of the anode opposite the solid polymer electrolyte.