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24. Event Localization by Pressure Drop Interpolation-Clustering and Parallel Optimization of Hydraulic Model Calibration
23. Acoustic Leakage Detection and Localization in Field Operational Water Distribution Networks.
22. Near Real-time Anomaly Event Detection and Classification with Trend Change Detection for Smart Water Grid Operation Management
21. Model Calibration with Water Loss Estimation and Localization Using Continuous Monitoring Data in Water Distribution Networks
20. Anomaly Detection and Evaluation for Smart Water System Management
19. Machine Vision-based Techniques for Non-Contact Structural Health Monitoring
18. Semantic Deep Learning And Rule Optimization For Surface Corrosion Detection And Evaluation
17. Method and System for Crack Detection, Assessment and Visualization Using Deep Learning with 3D Reality Mesh Model.
16. Finite Element Calibration Approach for Structural Load Identification
15. Evolutionary deep learning with extended Kalman filter for effective prediction modeling and data assimilation. USA patent application No.107051-0357
14. Software system for dynamic feature extraction for structural health monitoring, issued USA patent No.9,983,776 Abstract: In an example embodiment, a dynamic feature extraction software tool receives a data set from a SHM system that includes a plurality of sensors affixed to a structure (e.g., a bridge, dam, building, etc.), the data set including at least one of ambient vibration data or earthquake vibration data. A solution method is selected from among, for example, time domain analysis, frequency domain decomposition or eigensystem 5 realization analysis. The dynamic feature extraction tool guides a user to select at least one parameter value used in the selected solution method from a subset of determined-effective parameter values computed by the software tool. The dynamic feature extraction tool then automatically performs the selected solution method on the data set using the selected at least one parameter value to determine dynamic features (e.g., 10 frequencies or modal shapes), and displays a graphical representation of the dynamic features in a UI.
Abstract: In an example embodiment, an analysis application is used to optimize sensor placement by minimizing information entropy or maximizing total modal energy. These 25 objectives are achieved by implementing a two-part optimization procedure, involving generating an evaluation database that stores an information matrix, and using the evaluation database in conjunction with a genetic algorithm to produce an optimized senor location set.
12. Optimizing Hydrant Selection for Flow Test of Water Distribution Systems Abstract: In one embodiment, a technique is provided for optimizing selection of hydrants for flow test in a water distribution system. An impact database is built that indicates whether a flow test at each hydrant in the water distribution system has an impact on each pipe of the water distribution system. When a user supplies a number of hydrants to be subject to flow test, a hydrant selection solver application may search for an optimized set of hydrants for flow test that includes the user-supplied number, the searching to include generating candidate sets of hydrants and evaluating the candidate sets of hydrants based on fitness values calculated using the impact database, each fitness value to evaluate performance of a candidate set of hydrants based on flow velocity or hydraulic gradient change in pipes.
11. Optimizing Water Quality Sensor Placement for Water Distribution Systems Abstract: In one example embodiment, an analysis application is used to optimize water quality sensor placement in a water distribution network by implementing a two-part optimization solution procedure, involving building an impact database, and determining an optimized water quality senor location set using the impact database. The optimized senor location set may indicate locations that maximize a length of pipes where water quality variations are detectable by at least one water quality sensor. Pipe wall reaction coefficients may be used as calibration parameters, with water quality indicated to be detectable at a possible sensor location when a change in its pipe wall reaction coefficients leads to a change in water quality at the possible sensor location that is greater than a threshold.
10. Model-based Damage Detection Technique for a Structural System Abstract: In one example embodiment, an analysis software package implements an improved damage detection technique to identify damaged elements of a structure. The software package accesses a model and receives measured responses resulting from physical testing of the structure under initial conditions and under damaged conditions. The analysis software package may search for a set of damaged elements, wherein the searching is based on an error function that evaluates goodness-of-fit between the model and the structure under damaged conditions based on a discrepancy between a modeled response difference and a measured response difference, wherein the modeled response difference is a difference between modeled responses determined from the model configured to model initial conditions and with selected damaged elements, and the measured response difference is a difference in measured responses determined from physical testing of the structure under the initial conditions and under the damaged conditions.
9. Optimizing Sensor Placement for Structural Health Monitoring, issued USA patent No. 9,964,468 Abstract: This invention embodiment is used to optimize sensor placement by implementing a two-part optimization solution procedure, involving generating a contribution database, and determining an optimized senor location set using the contribution database. The optimized senor location set may indicate locations that maximize coverage of dynamic integrity, which is quantified by as a ratio of detectable damage scenarios to all damage scenarios used by the analysis application.
8. Method and System for Automatic Water Distribution Model Calibration, issued USA patent No. 7457735. Abstract: A water distribution model calibration technique is provided that allows a user to design a calibration model by selecting several input parameters desired to be used for the calibration of a model that allows an engineer to collect a complete set of data to represent the overall system conditions at any given time of day. For example, several parameters may be chosen including link status, the pipe roughness coefficient, junction demand, and pipe and valve operational status. Trial solutions of the model calibration are generated by a genetic algorithm program. A hydraulic network solver program then simulates each trial solution. A calibration module runs a calibration evaluation program to evaluate how closely the model simulation is to the observed data.
7. Technique for Optimization of a Simplified Network Model, issued USA Patent No. 7302372. Abstract: A method and system for optimization of a simplified engineering model is provided. A software tool efficiently simplifies an engineering model such as a water distribution system and preserves the hydraulic accuracy of the simplified model. The system includes a software program that employs a genetic algorithm to evolve solutions for reinstating the behavior of the original network into a simplified network. The genetic algorithm can be used for identifying the less sensitive hydraulic elements (links and nodes), and removing them or replacing them with the best-fit element parameters produced by the genetic algorithm module of the present invention. A element-by-element skeletonization approach generates the layout of a skeleton network and then identifies potential equivalent elements for replacing series pipes and loops. Yet another alternative includes taking a skeleton network model, and using the techniques of the present invention, optimizes the demand distribution and pipe conductance of the skeletonized model.
6. Method and System for Reduction of a Network Topology-based System Having Automated Optimization Features, issued USA patent No. 7054799. Abstract: A method and system for reduction of a network topology-based system having automated optimization features is provided. The method allows for skeletonization to be performed by one or more desired processes including Data Scrubbing, Parallel and Series Pipe Removal techniques, and Branch Trimming techniques. The Data Scrubbing technique includes a loop retaining sensitivity setting that allows the user to determine how large the hydraulic loops are that remain in the system. The data scrubbing technique also includes a network-walking feature in which the software will check each element, when desired, and determine whether it is safe to remove that element without affecting the topological and hydraulic connectivity of the engineering model being reduced. The feature also includes a genetic algorithm-based feature that allows for hydraulics or system behavior to be reintroduced into the model, which may have been eliminated when the elements that gave rise to those effects were removed using the data scrubbing skeletonization technique.
5. Method for Optimizing Design and Rehabilitation of Water Distribution System, issued USA patent No. 7593839. Abstract: A method and system for optimal design of a water distribution network is provided. Three levels of optimization are available as options for selection by the user and these include least cost optimization, maximum benefit optimization and cost-benefit tradeoff optimization. The optimization models, in accordance with the present invention, include solutions generated by a competent genetic algorithm that can take into account multiple objective functions. Pareto-optimal solutions are produced for the whole range of a budget for the water distribution system. Tradeoff solutions allow engineers to apply engineering judgement to choose the true optimal solution under the specific application being considered.
4. Computer Modeling Software for Analysis of the Criticality of Elements in a Water Distribution System, USA patent No. 8,639,483 Abstract: A method and system for performing a criticality analysis of a water distribution network is provided. The method and system provides for segmentation of the system which allows a user to determine the set of elements that comprise segments, which in turn are the smallest portion of a water distribution system that can be isolated by valving. Isolating valves are included as elements in the set of elements that are used by an associated hydraulic solver engine to segment the water distribution network. Once the network has been segmented, a criticality analysis is performed whereby a hydraulic simulation is run for an outage of one or more segments, and the shortfall in demand supplied to other segments is calculated. The system provides for a linking of the ability to automatically identify segments with a hydraulic analysis model to enable a user not only to identify segments, but to rank their importance based on a variety of user defined metrics.
3. System and Method for Modeling and Simulating Water Distribution and Collection Systems Including Variable Speed Pumps, USA patent No. 8265911. Abstract: In one embodiment, a technique is disclosed for calculating a relative pump speed factor for attaining a prescribed hydraulic head or for pumping a prescribed amount of flow. A hydraulic model of a water distribution or collection system is defined to include link elements and node elements. At least one of the node elements represents a fixed-flow variable speed pump (VSP) that delivers a desired amount of flow, a variable speed pump battery (VSPB) that represents multiple VSPs operating in parallel with each other, a VSP with a tank located on the VSP's discharge side, or a VSP with a tank located on the VSP's suction side.
2. System and Method for Pressure Dependent Water Distribution Analysis, USA patent No. 8,175,859. Abstract: A computer software program provides an algorithm that solves for unknown demands (and junction pressures) within a modeling system that uses a generalized, unified loop-node formulation. The program can be used to calculate the available demand (i.e., the amount of water that is to be supplied) according to the nodal pressure. Both nodal heads and flows are simultaneously solved using a gradient algorithm, which allows, in accordance with the present invention, the model to simulate situations where a change in pressure affects the quantity of water used. Criticality analyses for segments of a system in such pressure dependent scenarios can also be performed using the software program of the present invention.
1. System and Method for Pressure-Dependent Demand Optimization for Leakage Detection, USA patent No. 8,635,051 Abstract: In one embodiment, a hydraulic simulation model corresponding to a real-world hydraulic network is loaded in a hydraulic modeling and simulation application executing on a computer system. The hydraulic simulation model represents leakages as pressure dependent emitter flow at selected nodes (leakage nodes). Optimization criteria include a specified maximum of possible leakage nodes. A genetic algorithm (GA) generates trial solutions for an optimization, each trial solution representing locations for leakage nodes and corresponding emitter coefficients. A hydraulic analysis is performed for the trial solutions to generated model-simulated results. The model-simulated results are compared to field-observed data for the real-world hydraulic network to generate goodness-of-fit values. The process is repeated until a particular goodness-of-fit value is achieved or a maximum number of iterations is reached. Predicted locations for leakage nodes from a particular selected trial solution are then displayed to a user.
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