Results 71 to 80 of about 2,266,908 (195)

Parallel repair mechanisms in plants and animals

open access: yesDisease Models & Mechanisms, 2023
Timothy C. Byatt, Paul Martin
doaj   +1 more source

Evaluation on Configuration Stiffness of Overconstrained 2R1T Parallel Mechanisms

open access: yesChinese Journal of Mechanical Engineering
Currently, two rotations and one translation (2R1T) three-degree-of-freedom (DOF) parallel mechanisms (PMs) are widely applied in five-DOF hybrid machining robots. However, there is a lack of an effective method to evaluate the configuration stiffness of
Xuejian Ma   +5 more
doaj   +1 more source

Structure Synthesis and Optimization of Feed Support Mechanisms for a Deployable Parabolic Antenna

open access: yesJournal of Aerospace Technology and Management, 2016
In this paper, a systematic method to synthesize parallel mechanisms for feed support mechanisms based on screw theory is proposed. First, the motion requirement of the feed support mechanism is studied.
Xiaoke Song   +3 more
doaj  

Full Forward Kinematics of Lower-Mobility Planar Parallel Continuum Robots

open access: yesMathematics
In rigid lower-mobility parallel manipulators the motion of the end-effector is partially constrained due to a combination of passive kinematic pairs and rigid components.
Oscar Altuzarra   +3 more
doaj   +1 more source

Topology Synthesis of Assembly Parallel Mechanisms With Large Rotational Angle via FIS Theory

open access: yesJournal of Robotics
To meet the large rotational angle requirements in component assembly, this study addresses the deficiency in topological configurations and synthesis theories for mechanisms with large rotational angle characteristics. The topology synthesis process for
Xinyu Jia   +5 more
doaj   +1 more source

Type Synthesis of 2T2R Parallel Mechanisms Based on Optimal Transmission

open access: yesJixie chuandong, 2023
To synthesize a class of 2T2R parallel mechanisms with optimal transmission and large tilting ability, a type synthesis method for parallel mechanisms is proposed by combining the screw theory and the limb construction method.
Mao Jiang   +3 more
doaj  

Playing with Derivation Modes and Halting Conditions [PDF]

open access: yes, 2019
In the area of P systems, besides the standard maximally parallel derivation mode, many other derivation modes have been investigated, too. In this paper, many variants of hierarchical P systems and tissue P systems using different derivation modes ...
Freund, Rudolf   +1 more
core  

Auroral magnetosphere-ionosphere coupling: A brief topical review [PDF]

open access: yes
Auroral arcs result from the acceleration and precipitation of magnetospheric plasma in narrow regions characterized by strong electric fields both perpendicular and parallel to the earth's magnetic field.
Chiu, Y. T., Cornwall, J. M., Schulz, M.
core   +1 more source

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