Results 51 to 60 of about 26,961 (241)
Journal of Physics: Conference Series, 2019 Abstract The formulas for a complete analytical solution of the problem of moving cargo on a pendulum suspension of constant length along a given trajectory in a plane setting are presented. To set the desired trajectory as a time dependence of the linear horizontal coordinate of the cargo in a limited time interval, two-point Hermite ...
Mikhail S Korytov +2 more
openaire +1 more source
An experimental study of the efficiency of optimal control for lifting machines [PDF]
, 2019 The article is devoted to the synthesis of optimal speed performance control, in which the Pontryagin maximum principle and the phase-plane method are used to search for switching points of the relay control function.
Anishchenko, Galina +4 more
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Archaeological Prospection, EarlyView.ABSTRACT This study presents a strong framework for the detection and classification of Submerged Cultural Heritage Assets (SCHA) in shallow marine environments using the integration of multibeam echosounder and airborne LiDAR bathymetry with object‐based image analysis and fuzzy logic–based classification.
Łukasz Janowski +4 more
wiley +1 more source
Nihon Kikai Gakkai ronbunshu, 2016 A vibration suppressor is used to change the natural frequency of an elevator rope, and to prevent resonance. The elevator rope is modeled using a string. Linear string vibration is well known.
Hiroyuki KIMURA, Yuuki TAKIMAE
doaj +1 more source
Semi-Active Control of the Sway Dynamics for Elevator Ropes
, 2015 In this work we study the problem of rope sway dynamics control for elevator systems. We choose to actuate the system with a semi-active damper mounted on the top of the elevator car. We propose nonlinear controllers based on Lyapunov theory, to actuate the semi-active damper and stabilize the rope sway dynamics.
openaire +2 more sources
Archaeological Prospection, EarlyView.ABSTRACT In Upper Mesopotamia, the transition from the Pre‐Pottery Neolithic A (PPNA) to Pre‐Pottery Neolithic B (PPNB) period, ca. 10 800–10 600 cal. BP, is marked by a series of changes in chipped stone industries, architectural forms, symbolic objects, regional distribution of settlements and long‐distance exchange networks among others.
Toshihiro Tada +7 more
wiley +1 more source
https://www.researchgate.net/publication/329529188_Comparative_Performance_Prediction_of_Historical_Thames_A_Rater_Class_Designs [PDF]
, 2018 The Thames A-Rater fleet is a unique class both in appearance and in its combination of historic and modern technologies. With high aspect ratio, carbon fibre rigs fitted onto wooden hulls, many of which have survived two World Wars, the class is a ...
Souppez, Jean-Baptiste, Thomas, Joseph
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British Educational Research Journal, EarlyView.Abstract Quality in early childhood education and care (ECEC) is a contested concept and has generally been conceptualised by inter‐related indicators such as staff qualifications, educational environment, policy or child‐to‐staff ratios. There has been a more limited emphasis on how young children might perceive and experience quality.
Nikki Fairchild, Éva Mikuska
wiley +1 more source
Real-Time Wire Rope Inclination Detection Using YOLOv9-Based Camera–LiDAR Fusion for Overhead Cranes
Journal of Marine Science and EngineeringSafe and efficient cargo handling is essential in modern port logistics, where overhead cranes are widely used to move containers, bulk materials, and heavy equipment.
Anh-Hung Pham +4 more
doaj +1 more source
Free vibration analysis of a string with vibration suppressor
Nihon Kikai Gakkai ronbunshu, 2014 When an elevator rope for a high-rise building is forcibly excited by the displacements of the building induced by wind forces and/or by long-period ground motion.
Hiroyuki KIMURA
doaj +1 more source