| 摘要 |
A measurement system for measuring the operation of a device, the measurement system comprising: a plurality of virtual sensors defining a multidimensional virtual sensor space; a normal operation determiner (33) for determining at least one region of normal operation for said device, said at least one region being defined within said multi- dimensional virtual sensor space; and an abnormal condition determiner (34) for providing a warning when said operation does not fall within said at least one normal operation region.
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