System and method for incident detection with spatiotemporal thresholds estimated via nonparametric quantile regression

• US 9,207,106 B2
• Filed: 09/05/2013
• Issued: 12/08/2015
• Est. Priority Date: 06/26/2013
• Status: Expired due to Fees

• Current Assignee: GlobalFoundries, Inc.
• Original Assignee: GLOBALFOUNDRIES U.S. 2 LLC (GlobalFoundries, Inc.)
• Inventors: Wynter, Laura, Kamarianakis, Ioannis
• Primary Examiner(s): Le, Toan
• Application Number:
  US14/018,548
• Publication Number:
  US 20150006111A1
• Time in Patent Office: 824 Days
• US Class Current: 1/1
• CPC Class Codes: G01D 18/002 Automatic recalibration G01D18/008 takes precedence
• CPC Class Codes: G01D 3/10 with provision for switching-in of additional or auxiliary indicators or recorders

Abstract

Systems and methods for incident detection are provided. A system for incident detection includes a network including at least one detector for detecting events in the network, a detection module capable of processing data from the at least one detector, and a calibration module capable of calibrating a plurality of bands for the incident detection based on a plurality of decision variables, wherein the plurality of bands define thresholds that are time-varying for all measurement locations in the network, and the thresholds are estimated using nonparametric quantile regression.

Claims

1. A system for incident detection, comprising:

a network including at least one detector for detecting events in the network;

a detection module capable of;

processing data from the at least one detector;

detecting, at a predetermined location over a predetermined time period, data for determining a plurality of decision variables for incident detection; and

detecting data corresponding to a decision variable at a particular time t;

a calibration module capable of calibrating a plurality of bands for the incident detection based on the plurality of decision variables, wherein;

the plurality of bands define thresholds that are time-varying for all measurement locations in the network; and

the thresholds are estimated using nonparametric quantile regression; and

a determination module capable of;

determining the plurality of decision variables over the predetermined time period;

determining the decision variable at the time t; and

querying whether the decision variable at the time t falls outside a band of the plurality of bands to determine whether an incident has occurred;

wherein the querying comprises comparing the decision variable at the time t with a time-varying threshold defined by the band at the time t;

wherein an alert is issued in response to a determination that the incident has occurred;

wherein the detection module includes at least one sensor performing the detecting;

wherein the sensor records occupancy at the predetermined location over the predetermined time period by recording a passage of each traveling element on the network over a fixed loop; and

wherein the alert is issued at a command center capable of responding to the incident.

2. The system according to claim 1, wherein the determination module uses a same band of the plurality of bands to make a determination of an occurrence of a downstream incident and an occurrence of an upstream incident in the network.

3. The system according to claim 1, wherein at least two thresholds respectively comprise upper and lower limits of a band of the plurality of bands and a width of the band is variable over time.

4. The system according to claim 1, wherein the decision variables represent a shock in occupancy and an occupancy level at a time.

5. The system according to claim 4, wherein the calibration module performs the calibration using a plurality of parameters, wherein first and second parameters are quantiles for shocks in occupancies, and third and fourth parameters are quantiles for occupancy levels.

6. The system according to claim 1, wherein:

the comparing comprises determining whether the decision variable at the time t is less than or greater than a conditional quantile function for the decision variable to determine whether the incident has occurred.

7. An article of manufacture comprising a non-transitory computer readable storage medium comprising program code tangibly embodied thereon, which when executed by a computer, performs method steps for incident detection, the method steps comprising:

designating a plurality of decision variables for incident detection;

detecting, at a predetermined location over a predetermined time period, data for determining the plurality of decision variables;

determining the plurality of decision variables over the predetermined time period;

calibrating a plurality of bands for the incident detection based on the determined decision variables, wherein;

the plurality of bands define thresholds that are time-varying for all measurement locations in a network; and

the thresholds are estimated using nonparametric quantile regression;

detecting data corresponding to a decision variable at a particular time t;

determining the decision variable at the time t;

querying whether the decision variable at the time t falls outside a band of the plurality of bands to determine whether an incident has occurred; and

issuing an alert in response to a determination that the incident has occurred;

wherein the querying comprises comparing the decision variable at the time t with a time-varying threshold defined by the band at the time t;

wherein the detecting is performed by at least one sensor;

wherein the sensor records occupancy at the predetermined location over the predetermined time period by recording a passage of each traveling element on the network over a fixed loop; and

wherein the alert is issued at a command center capable of responding to the incident.

8. The article of manufacture according to claim 7, wherein a determination of an occurrence of a downstream incident and an occurrence of an upstream incident in the network is performed using a same band of the plurality of bands.

9. The article of manufacture according to claim 7, wherein at least two thresholds respectively comprise upper and lower limits of a band of the plurality of bands and a width of the band is variable over time.