Results 31 to 40 of about 43,408 (125)

Kinematics and Statics Analysis of Single Drive Multi-mode Metamorphic Manipulators

open access: yesJixie chuandong, 2023
In order to achieve accurate grasping of the target object with fewer drives, a metamorphic manipulator with single drive and multi-mode is proposed by combining metamorphic principle with the kite-straight-line mechanism.
Chang Boyan   +3 more
doaj  

Three-Band Spectral Camera Structure Design Based on the Topology Optimization Method

open access: yesApplied Sciences
The housing and bracket structure are critical components of multispectral cameras; the mechanical properties significantly affect the stability of the optical system and the imaging quality.
Kai Hu   +4 more
doaj   +1 more source

Simulation on following Performance of High-Speed Railway In Situ Testing System

open access: yesAdvances in Mechanical Engineering, 2013
Subgrade bears both the weight of superstructures and the impacts of running trains. Its stability affects the line smoothness directly, but in situ testing method on it is inadequate. This paper presents a railway roadbed in situ testing device, the key
Fei-Long Zheng   +2 more
doaj   +1 more source

Evaluation of Time Series Models in Simulating Different Monthly Scales of Drought Index for Improving Their Forecast Accuracy

open access: yesFrontiers in Earth Science, 2022
Drought is regarded as one of the most intangible and creeping natural disasters, which occurs in almost all climates, and its characteristics vary from region to region.
Shahab S. Band   +10 more
doaj   +1 more source

Ensuring of the industrial robot link motion accuracy parameters in the low-speed zone

open access: yesAdvanced Engineering Research, 2019
Introduction. The article is devoted to the search for a method of reducing the effect of friction links mobility industrial robot PR (production mechanism PM) with frequency-controlled electric drive (FCED) on the static error (accuracy) positioning of ...
N. F. Karnaukhov   +3 more
doaj   +1 more source

Model and phase-diagram analysis of photothermal instabilities in an optomechanical resonator

open access: yesNew Journal of Physics, 2017
A study of the phototermal instabilities in a Fabry–Perot cavity is reported, where one mirror consists of a silicon-nitride membrane coated by the molecular organic semiconductor tris(8-hydroxyquinoline) aluminum and silver layers.
Alessandra Bigongiari   +5 more
doaj   +1 more source

Dynamics of Population Patch Distribution

open access: yesМоделирование и анализ информационных систем, 2018
The problem of selection by the patch population in the absence of information on the utility of the patch, that is, the volume of its energy resources, is considered. This problem relates to the theory of optimal foraging. U.
Alexander N. Kirillov, Inna V. Danilova
doaj   +1 more source

Evolution of the Early Universe in Einstein–Cartan Theory

open access: yesUniverse
Einstein–Cartan theory is a generalization of general relativity that introduces spacetime torsion. In this paper, we perform phase space analysis to investigate the evolution of the early universe in Einstein–Cartan theory.
Qihong Huang   +3 more
doaj   +1 more source

Straightforward and accurate technique for post-coupler stabilization in drift tube linac structures

open access: yesPhysical Review Accelerators and Beams, 2016
The axial electric field of Alvarez drift tube linacs (DTLs) is known to be susceptible to variations due to static and dynamic effects like manufacturing tolerances and beam loading.
Mohammad Reza Khalvati   +1 more
doaj   +1 more source

SOLUTION OF THE PROBLEM OF THE AIR TEMPERATURE STABILIZATION IN THE CABIN OF THE VEHICLE

open access: yesАвіаційно-космічна техніка та технологія, 2018
The subject matter of the article is the processes of synthesis of the automatic stabilization system (ASS) of the temperature in the vehicle cabin simulator using the vortex energy separator (VES) as the executive element of the system.
Сергей Николаевич Пасичник   +1 more
doaj   +1 more source

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