Results 1 to 10 of about 473,597 (273)

Looking into the Market Behaviors through the Lens of Correlations and Eigenvalues: An Investigation on the Chinese and US Markets Using RMT

open access: yesEntropy, 2023
This research systematically analyzes the behaviors of correlations among stock prices and the eigenvalues for correlation matrices by utilizing random matrix theory (RMT) for Chinese and US stock markets.
Yong Tang   +6 more
doaj   +1 more source

Construction and research on the navigation condition of oil supply vessels [PDF]

open access: yesE3S Web of Conferences, 2022
Constructing navigation condition of oil supply vessels is of vital importance to both the research on the main engine and the safety of navigation. This paper carries out in-depth research and analysis based on the half-year shipping data derived from ...
Hong Shiding   +3 more
doaj   +1 more source

Electromagnetic Steklov eigenvalues: approximation analysis [PDF]

open access: yesESAIM: Mathematical Modelling and Numerical Analysis, 2021
We continue the work of Camano et al. [SIAM J. Math. Anal. 49 (2017) 4376–4401] on electromagnetic Steklov eigenvalues. The authors recognized that in general the eigenvalues do not correspond to the spectrum of a compact operator and hence proposed a modified eigenvalue problem with the desired properties.
openaire   +5 more sources

Investigation of microtremors observed at historic masonry townhouse buildings after Nepal earthquake

open access: yesFrontiers in Built Environment, 2022
The Gorkha earthquake in 2015 was a recent large-scale earthquake that caused severe damage to many historic masonry buildings in the Kathmandu Valley, Nepal.
Yoichi Mukai   +5 more
doaj   +1 more source

Dynamic interactions stability analysis of hybrid renewable energy system with SSSC [PDF]

open access: yesArchives of Electrical Engineering, 2021
The static series synchronous compensator (SSSC) has demonstrated its capability in providing voltage support and improving power system stability.
Ping He, Pan Qi, Yuqi Ji, Zhao Li
doaj   +1 more source

Modelling and Stability Analysis of Articulated Vehicles

open access: yesApplied Sciences, 2021
This study constructs a nonlinear dynamic model of articulated vehicles and a model of hydraulic steering system. The equations of state required for nonlinear vehicle dynamics models, stability analysis models, and corresponding eigenvalue analysis are ...
Tianlong Lei, Jixin Wang, Zongwei Yao
doaj   +1 more source

Improvement of damping characteristics and index evaluation of a wind-PV-thermal-bundled power transmission system by combining PSS and SSSC

open access: yesArchives of Electrical Engineering, 2020
The grid integration of large-scale wind and solar energy affects the power flow of wind-PV-thermal-bundled power transmission systems and may introduce an unpredicted threat to the power system’s small signal stability.
Ping He   +4 more
doaj   +1 more source

Loop eigenvalue elasticity analysis: three case studies [PDF]

open access: yesSystem Dynamics Review, 2006
We explore the application of loop eigenvalue elasticity analysis (LEEA) to three different models in order to assess the potential of the method for generating insights about model behavior and to uncover issues in developing the method further. The results indicate that the utility of the method depends upon the character of the model and dynamics ...
Kampmann, Christian Erik, Oliva, Rogelio
openaire   +2 more sources

Improving the Cross-Border Activation of the Regulating Reserve to Enhance the Provision of Load-Frequency Control

open access: yesIEEE Access, 2020
This paper presents the Cross-Border activation of the Regulating Reserve (CBRR) between participating Control Areas (CAs), which is being developed to reduce the costs of balancing energy.
Marcel Topler   +2 more
doaj   +1 more source

Small-Signal Stability Analysis of Photovoltaic-Hydro Integrated Systems on Ultra-Low Frequency Oscillation

open access: yesEnergies, 2020
In recent years, ultralow-frequency oscillation has repeatedly occurred in asynchronously connected regional power systems and brought serious threats to the operation of power grids.
Sijia Wang   +3 more
doaj   +1 more source

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