Results 31 to 40 of about 82,495 (263)

Safe Learning of Quadrotor Dynamics Using Barrier Certificates

open access: yes, 2017
To effectively control complex dynamical systems, accurate nonlinear models are typically needed. However, these models are not always known. In this paper, we present a data-driven approach based on Gaussian processes that learns models of quadrotors ...
Egerstedt, Magnus   +2 more
core   +1 more source

Extended Traffic Crash Modelling through Precision and Response Time Using Fuzzy Clustering Algorithms Compared with Multi-layer Perceptron

open access: yesPromet (Zagreb), 2012
This paper compares two fuzzy clustering algorithms – fuzzy subtractive clustering and fuzzy C-means clustering – to a multi-layer perceptron neural network for their ability to predict the severity of crash injuries and to estimate the response time on ...
Iman Aghayan   +2 more
doaj   +1 more source

The Nasdaq crash of April 2000: Yet another example of log-periodicity in a speculative bubble ending in a crash

open access: yes, 2000
The Nasdaq Composite fell another $\approx 10 %$ on Friday the 14'th of April 2000 signaling the end of a remarkable speculative high-tech bubble starting in spring 1997. The closing of the Nasdaq Composite at 3321 corresponds to a total loss of over 35%
Johansen, Anders, Sornette, Didier
core   +2 more sources

Testing for financial crashes using the Log Periodic Power Law mode [PDF]

open access: yes, 2013
A number of papers claim that a Log Periodic Power Law (LPPL) fitted to financial market bubbles that precede large market falls or 'crashes', contain parameters that are confined within certain ranges.
Bree, David S., Joseph, Nathan Lael
core   +2 more sources

Improving the Process of Early-Warning Detection and Identifying the Most Affected Markets: Evidence from Subprime Mortgage Crisis and COVID-19 Outbreak—Application to American Stock Markets

open access: yesEntropy, 2022
Stock-market-crash predictability is of particular interest in the field of financial time-series analysis. Famous examples of major stock-market crashes are the real-estate bubble in 2008 and COVID-19 in 2020. Several studies have studied the prediction
Heba Elsegai
doaj   +1 more source

Real‐time freeway sideswipe crash prediction by support vector machine

open access: yesIET Intelligent Transport Systems, 2013
This study presents the applications of a pattern classifier named support vector machine (SVM) in predicting freeway sideswipe crash potential. Historical loop detector data for sideswipe crashes and corresponding non‐crash cases were collected from Interstate‐894 in the Milwaukee, Wisconsin, USA.
Xu Qu, Wei Wang, Wenfu Wang, Pan Liu
openaire   +1 more source

Hierarchical dynamic modeling for highway network real-time risk forecasting with digitalized vehicle data

open access: yesInternational Journal of Transportation Science and Technology
In traffic safety management, identifying high-risk areas prone to traffic crashes is crucial. Road authorities focus on these high-risk segments to implement strategies that mitigate the impact of recurring crashes.
Donghyoek Park   +4 more
doaj   +1 more source

Robustness of Bio-Inspired Visual Systems for Collision Prediction in Critical Robot Traffic

open access: yesFrontiers in Robotics and AI, 2021
Collision prevention sets a major research and development obstacle for intelligent robots and vehicles. This paper investigates the robustness of two state-of-the-art neural network models inspired by the locust’s LGMD-1 and LGMD-2 visual pathways as ...
Qinbing Fu   +6 more
doaj   +1 more source

Traffic event detection framework using social media [PDF]

open access: yes, 2017
This is an accepted manuscript of an article published by IEEE in 2017 IEEE International Conference on Smart Grid and Smart Cities (ICSGSC) on 18/09/2017, available online: https://ieeexplore.ieee.org/document/8038595 The accepted version of the ...
Ammari, A   +4 more
core   +1 more source

Implementation and Evaluation of a Cooperative Vehicle-to-Pedestrian Safety Application

open access: yes, 2017
While the development of Vehicle-to-Vehicle (V2V) safety applications based on Dedicated Short-Range Communications (DSRC) has been extensively undergoing standardization for more than a decade, such applications are extremely missing for Vulnerable Road
Abuchaar, Oubada   +4 more
core   +1 more source

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