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The Existence of Cone Critical Point and Common Fixed Point with Applications
Journal of Applied Mathematics, 2011 We first establish some new critical point theorems for nonlinear dynamical systems in cone metric spaces or usual metric spaces, and then we present some applications to generalizations of Dancš-Hegedüs-Medvegyev's principle and the existence theorem ...
Wei-Shih Du
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Low-Cost Materials for Heliostats
SolarPACES Conference ProceedingsFour heliostat concepts with extensive use of timber, concrete, or polymers were developed. For cost comparison, a 2 m² benchmark heliostat was designed and built with only moderate or no use of these materials.
Andreas Pfahl, Volkmar Dohmen
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Periodic perturbations of Hamiltonian systems
Advances in Nonlinear Analysis, 2016 We prove existence and multiplicity results for periodic solutions of Hamiltonian systems, by the use of a higher dimensional version of the Poincaré–Birkhoff fixed point theorem.
Fonda Alessandro +2 more
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SolarPACES Conference ProceedingsAn approach to estimate the wind load spectra for heliostats is proposed. It is based on the wind-induced fatigue cycle counts for buildings given by the Eurocode EN 1991 and considers heliostat specific impact factors.
Andreas Pfahl
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High-precision geo-referencing of UAS data with robotic total stations [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information SciencesRobotic Total Stations (RTS) allow the measurement of 3D positions of kinematic targets with high accuracy. They find wide applications for geo-referencing multisensor systems, but little focus has been put on the geo-referencing of Unmanned Aerial ...
L. Dammert +5 more
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Advances in Difference Equations, 2021 The approximate controllability of second-order integro-differential evolution control systems using resolvent operators is the focus of this work. We analyze approximate controllability outcomes by referring to fractional theories, resolvent operators ...
Velusamy Vijayakumar +4 more
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Manufacturing injection-moleded Fresnel lens parquets for point-focus concentrating photovoltaic systems [PDF]
, 1995 This project involved the manufacturing of curved-faceted, injection-molded, four-element Fresnel lens parquets for concentrating photovoltaic arrays. Previous efforts showed that high-efficiency (greater than 82%) Fresnel concentrators could be injection molded.
Peters, Eric M., Masso, Jon D.
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Recent advances in open billiards with some open problems [PDF]
, 2010 Much recent interest has focused on "open" dynamical systems, in which a classical map or flow is considered only until the trajectory reaches a "hole", at which the dynamics is no longer considered.
Dettmann, Carl P.
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Point thermal bridges of insulated pitched roof structures
MATEC Web of Conferences, 2018 The current demands on building insulation are continuously increasing. It is understood that the lower the heat transfer coefficient of a particular part of a construction is, the greater the importance of systemic thermal bridges. This article compares
Šál Jiří +2 more
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Virtual Reality & Intelligent Hardware, 2019 Background Ultrasonic tactile representation utilizes focused ultrasound to create tactile sensations on the bare skin of a user’s hand that is not in contact with a device. This study is a preliminary investigation on whether different ultrasonic haptic
Chongyang SUN, Weizhi NAI, Xiaoying SUN
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