Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"event location"”.
-
Sensor placement for microseismic event location
… earthquakes that are referred to as microseismic events. Monitoring of microseismic events is useful in predicting and comprehending hazards, and in evaluating the overall performance of a mine design. A robust localization algorithm is used to estimate the source position of the microseismic …
-
Automated seismic event location by waveform coherence analysis
Automated location of seismic events is a very important task in microseismic monitoring operations as well for local and regional seismic monitoring. Since microseismic records are generally characterised by low signal-to-noise ratio, such methods are requested to be noise robust and sufficiently …
-
Earthquake location using a 3D velocity model : an example in Sichuan Province, China
… three-dimensional velocity models to seismic event location. We develop a technique for three-dimensional seismic event location, utilizing a finite difference method for travel time calculation and a grid search method for location. We apply this technique to the location of three events in …
-
Autonomous Detection of Nearby Loss of Generation Events for Decentralized Controls
… is to verify that a nearby loss of generation event in power system can be distinguished from similar remote disturbances by analyzing the resulting local modes of oscillation. An oscillation-based index derived from methods like Fourier transform, sinc filters and resonant filters is devised …
-
Tidal and Structural Controls on Seismic Events Near the Grounding Line at Beardmore Glacier, Antarctica
Here I report seismic events occurring over a three-week period during the 2013-2014 austral summer near the grounding line of Beardmore Glacier, Antarctica. The ~24000 events over this time frame had a noticeable temporal pattern that correlates well with the principally diurnal tides of …
-
Index and characteristic analysis of partial differential equations
… along with operating policies and discrete events. Simulation of flowsheet models with this level of detail forms the basis for a wide variety of activities, such as process optimization, startup and shutdown studies, process design, batch policy synthesis, safety interlock validation, and …
-
Relocation study of Virginia earthquakes (1959-1981) using the Joint Hypocenter Determination and Joint Epicenter Determination methods
A relocation study is made for 50 Virginia earthquakes (1959-1981) using a variation (JED/SE77) of the Joint Hypocenter Determination (JHD) method. Joint Epicenter Determinations (JED) were used in conjunction with a companion single event location program (SE77) to relocate hypocenters from data …
-
Imaging the Soultz Enhanced Geothermal Reservoir using double-difference tomography and microseismic data
… 1993 hydraulic stimulations along with starting event locations obtained using Joint Hypocenter Determination and Collapsing methods. The stimulations produced over 12000 microseismic events of which we chose 8930 for further analysis. We obtained high accuracy cross-correlation differential …
-
Using machine learning to derive insights from sports location data
… has aimed to find relationships between discrete events and outcomes. The availability of high-resolution event location and tracking data has led to many new opportunities in sports research. However, it is often challenging to apply machine learning to understand a particular aspect of a sport. …
-
Frequency Monitoring Network (FNET) Algorithm Improvements and Application Development
… sent via the Internet from different locations of interest, and efficiently run the analyzing program to detect and record significant system disturbances and subsequently estimate the location of disturbance center, namely the event location, in the electric grid based on the …
-
The Mechanisms and Triggering of Earthquakes in the Ridge-Transform Environment
… In the field of seismology, precise earthquake locations can illuminate regions of active seismic deformation, and help us better understand the orientation, mechanics, and kinematics of plate boundary zones. Although ocean bottom seismometers have been in use since the late 1930s, the …
-
Wide Area Analysis and Application in Power System
… and smoothing FDR signals, the algorithm of event trigger is present with Visual C++ DLL programming. Estimation of disturbance location method is discussed based on the time delay of arriving (TDOA) in the second part of this work. In this section, author shows the multiply method to …
-
New Methods for Synchrophasor Measurement
… awareness techniques, such as real-time event alerts, accurate event location estimation, animated event visualization, and post event analysis. Traditionally, Phasor Measurement Units (PMUs) have utilized signals obtained from current transformers (CTs) to compute current phasors. …
-
High Accuracy Real-time GPS Synchronized Frequency Measurement Device for Wide-area Power Grid Monitoring
… synchronization signal, UTC time stamp, and unit location. This research work also addresses the harmonics, voltage swing and other noise components' impacts on the measurement results, and the optimized design of filters and a coherent sampling scheme to reduce or eliminate those impacts. The …
-
Power Systems Analysis in the Power-Angle Domain
… modal analysis, stability analysis, and event location and identification based on a small number of angle or frequency measurements. Fault studies and contingency analysis are typically performed with detailed time-domain simulations, where the electromechanical response of the system is …
-
Changes in Resident Perceptions Over Time: A Theoretical Examination of a Mega-Event
Cities and countries increasingly seek mega-events to boost tourism, update local infrastructure, and improve the international standing of the host community. Benefits are actively promoted by the organizing committees, but these large-scale events also create significant economic, environmental …
-
Nonsmooth dynamic optimization of systems with varying structure
… for their solution is proposed based on state event location algorithms that detects these discontinuities. Necessary conditions of optimality for nonlinear programs are derived using these substitutes and it is shown that nonsmooth optimization methods called bundle methods can be used to …
-
Dynamic Model Based Novel Findings in Power Systems Analysis and Frequency Measurement Verification
… the U.S. Using the measured frequency data, the event of the power system is triggered, and its location and scale are estimated. This study also looks for the possibility of using the simulation technologies to contribute the applications of FNET, finds similarity of the event detection orders …
-
Design and Analysis for the DarkSide-10 Two-Phase Argon Time Projection Chamber
… dark matter nuclear recoils and background events. Presented here are simulations, designs, and analyses involving the electroluminescence in the gas phase from extracted ionization charge for both DarkSide-10 and DarkSide-50. This work involves the design of the HHV systems, including field …
-
Seismicity of the Bath County, Virginia locale
… layer underlain by the mantle. A test of the locational capabilities of the Bath County Network utilizing construction and quarry blasts was carried out for the 3 different velocity models. All three models gave virtually identical locations. The tests indicate an average of less than 1 km …
Page 1 of 2