Abstract: A fuel cell system includes a plurality of fuel cells and a control device that controls an operation state of each fuel cell. The control device has a command receiver that acquires an output command showing a total output power which should be generated by the fuel cell system, a first determiner that determines the number of fuel cells which should be operated in the normal operation mode, and an operation state manager that determines the operation state of each fuel cell. Based on the output command, the operation state manager changes the operation state of at least one of the fuel cells which are being operated in the normal operation mode to the standby operation mode, or changes the operation state of at least one of the fuel cells which are being operated in the standby operation mode to the normal operation mode.

Abstract: An apparatus as an aspect of the present invention is a factor analysis apparatus that analyzes a relationship between a target event that is a target of factor analysis and an assumed factor of the target event, and includes a similarity calculator, a first influence calculator, and a second influence calculator. The similarity calculator calculates a degree of similarity between a data item included in provided time-series data and the assumed factor. The first influence calculator calculates a first degree of influence indicating a degree of influence of the data item on the target event on the basis of time-series data of the data item and time-series data of the target event. The second influence calculator calculates a second degree of influence indicating a degree of influence of the assumed factor on the target event on the basis of the degree of similarity and the first degree of influence.

Abstract: According to one embodiment, an information processing apparatus includes a processor. The processor is configured to detect a state of a device by applying device information on the device to a state detection model generated based on past device information on the device and characteristic information indicating characteristics of a moving body equipped with the device.

Abstract: An apparatus as an aspect of the present invention is a factor analysis apparatus that analyzes a relationship between a target event that is a target of factor analysis and an assumed factor of the target event, and includes a similarity calculator, a first influence calculator, and a second influence calculator. The similarity calculator calculates a degree of similarity between a data item included in provided time-series data and the assumed factor. The first influence calculator calculates a first degree of influence indicating a degree of influence of the data item on the target event on the basis of time-series data of the data item and time-series data of the target event. The second influence calculator calculates a second degree of influence indicating a degree of influence of the assumed factor on the target event on the basis of the degree of similarity and the first degree of influence.

Abstract: According to one embodiment, a diagnostic device includes an anomaly diagnoser and a graph creator. The anomaly diagnoser performs anomaly diagnosis based on first measured data. The graph creator determines parameter information for graph production in accordance with a result of the anomaly diagnosis and creates a first graph from the first measured data based on the parameter information.

Abstract: According to one embodiment, a controlling apparatus is a controlling apparatus to control a combined cycle power plant that includes at least a plurality of units, each of the units including a gas turbine; an heat recovering steam generator that recovers heat of exhaust gas from the gas turbine and generates steam from an incorporated drum; and a turbine bypass regulating valve that sends the steam generated from the drum while keeping a predetermined pressure, and comprises a steam header unit that merges together the steam generated from a plurality of the drums; and a steam turbine to which the steam in the steam header unit is supplied. The controlling apparatus comprising a controlling unit that controls a plurality of the turbine bypass regulating valves based on a steam pressure detected in the steam header unit when the plurality of the units are linked.