Abstract: In example embodiments, a shortest path first-based isolation trace function is provided to determines what switchable elements need to be closed to stop flow of a quality to a location in an infrastructure model arranged as a network. The shortest path first-based isolation trace function may perform shortest-path traces from the location to each source. For each successful shortest-path trace finding one or more switchable elements, the first switchable element encountered on the path of the trace is added to a solution set, and marked as active to prevent further traversal in subsequent shortest-path traces. When all the shortest-path traces are complete, the solution set may be returned as a result. If no switchable element is found on a path of one of the shortest-path traces, it may be concluded that the location cannot be isolated and such conclusion returned as the result instead of the solution set.

Abstract: A method of establishing a cumulative sum (CUSUM) tracking strategy that limits large positions is disclosed. The method monitors the price of an asset over time and classifies changes as an upward or downward trend. An upward cumulative and downward cumulative sum are compared to thresholds. An alarm is fired when a threshold is exceeded. A buy action is performed during the upward trend or a sell action is performed during the downward trend. The method is restarted with newly-initialized upward cumulative sum and downward cumulative sum when the alarm is triggered.