Abstract: Provided is a prediction system that predicts whether a prescribed event will occur in a device, without being affected by differences among individual devices. The prediction system comprises: a data acquisition unit which acquires operation data representing the operation status of a device; a probability density estimation unit which estimates the probability density of the operation data; and an abnormality prediction unit which predicts whether an abnormality will occur in the device on the basis of the probability density estimation results of the operation data and a prediction model.

Abstract: A method and apparatus for operating an engine with a plurality of cylinders, which are capable of appropriately controlling the engine after the cutoff of fuel into a cylinder having heavy knock, without at once stopping the engine upon the detection of the heavy knock. The method of operating the engine, which is capable of stepwise or continuously correcting a burning state through fuel regulation including the cutoff of fuel, upon occurrence of abnormal combustion, executes a stop or output limit operation on the engine. The method includes setting a simulated abnormal combustion, and determining abnormal combustion of a cylinder by comparing a detection signal as to a burning state of a cylinder, which is sequentially selected, with the simulated abnormal combustion signal to determine abnormal combustion in order to execute a cutoff of fuel into the selected cylinder.

Abstract: Provided are a method of operating an engine and an apparatus for controlling operation of an engine, which is capable of appropriately controlling the operation of the engine after cutoff of fuel into a cylinder in which heavy knock occurs, without at once stopping the engine upon detection of occurrence of the heavy knock.