A sequence online analytical processing (S-OLAP) system 50 for analysing an event database (41) storing events (12), the system (50) comprising: an S-OLAP engine (53) to compute an S-cuboid (49) for a query on the event database (41); a sequence query engine (54) to form part of the S-cuboid (49) by.....
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A railway monitoring system firstly includes an optical fiber. A first part of the fiber is attachable to one of a pair of tracks of a rail, and a characteristic of the first part of the fiber is variable in correspondence to variance of a characteristic of said one track where the first part of fib.....
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The present invention provides a mounting mechanism for a removable bollard, which has high flexibility and convenience for the removal and reinstallation of the bollard and the socket for inserting the bollard can be covered without having additional devices after the removal of the bollard.
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