Results 1 to 10 of about 50,546 (263)
Analysis of the Influence of Downhole Drill String Vibration on Wellbore Stability
Machines, 2023 Most studies related to aspects of wellbore stability, such as wellbore breakage, block dropping, and wellbore expansion, revolve around the physicochemical interaction between drilling fluid and surrounding rock, but relevant studies show that drill ...
Yonggang Shan +4 more
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On the stability of string theory vacua
Journal of High Energy Physics, 2022 Vacuum compactifications may suffer from instabilities under small perturbations or tunnel effects; both are difficult to analyze. In this paper we consider the issue from a higher-dimensional perspective.
Suvendu Giri +2 more
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String Stability Analysis and Design Guidelines for PD Controllers in Adaptive Cruise Control Systems [PDF]
SensorsThis paper proposes a practical design guideline for selecting control parameters in adaptive cruise control (ACC) systems to ensure both individual vehicle stability and string stability in vehicle following systems with homogeneous longitudinal ...
Kangjun Lee, Chanhwa Lee
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PD Control with Feedforward Compensation for String Stable Cooperative Adaptive Cruise Control in Vehicle Platoons [PDF]
SensorsIn this paper, we propose systematic controller design guidelines to ensure both individual vehicle stability and string stability in cooperative adaptive cruise control (CACC)-based platoon systems, assuming a homogeneous platoon where all vehicles ...
Kangjun Lee, Chanhwa Lee
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Applied Sciences, 2023 For the vehicular platoon consisting of connected automotive vehicles, time delays degrade both the internal stability and string stability. In this study, the internal stability and string stability of the vehicular platoon suffering from sensing delay ...
Xu Zhu +3 more
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Mathematics, 2023 In this article, we investigate the behavior of vehicle platoons operating in a predecessor-following configuration, implemented through sampled-data control systems.
Felipe I. Villenas +2 more
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Nihon Kikai Gakkai ronbunshu, 2022 The number of vehicles equipped with adaptive cruise control (ACC) is increasing, reflecting a trend toward autonomous vehicle development. It is expected that ACC systems will improve traffic in terms of string stability (i.e., attenuation of spacing ...
Masahiko KURISHIGE +2 more
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A Novel Path Planning Algorithm for Truck Platooning Using V2V Communication
Sensors, 2020 In truck platooning, the leading vehicle is driven manually, and the following vehicles run by autonomous driving, with the short inter-vehicle distance between trucks.
Yongki Lee +4 more
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Stability of modified electroweak strings [PDF]
Zeitschrift für Physik C: Particles and Fields, 1996 Minor changes and inclusion of one figure. To be published on Z. f. Physik C.
Masperi, Luis, Megevand, Ariel
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Quantum stabilization of cosmic strings [PDF]
Modern Physics Letters A, 2015 In the standard model, stabilization of a classically unstable cosmic string may occur through the quantum fluctuations of a heavy fermion doublet. We review numerical results from a semiclassical expansion in a reduced version of the standard model. In this expansion, the leading quantum corrections emerge at one loop level for many internal degrees ...
Weigel, H., Quandt, M., Graham, N.
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