Results 11 to 20 of about 2,384,762 (293)

A New Gaining-Sharing Knowledge Based Algorithm with Parallel Opposition-Based Learning for Internet of Vehicles

open access: yesMathematics, 2023
Heuristic optimization algorithms have been proved to be powerful in solving nonlinear and complex optimization problems; therefore, many effective optimization algorithms have been applied to solve optimization problems in real-world scenarios.
Jeng-Shyang Pan   +4 more
doaj   +1 more source

Structure of Parallel Mechanism Combined with Waterbomb-Base-Inspired Origami

open access: yesEngineering Proceedings, 2023
Structure from the geometry and analysis of the three-spherical kinematic chain-base parallel mechanism have been studied. The parallel mechanism evolved from an origami fold as chain legs with three spherical kinematic chains becoming rigid bodies.
Lulu Al Marjan, Shyh-Chour Huang
doaj   +1 more source

Analysis of Motion Errors of Linear Guide Pair Based on Parallel Mechanism

open access: yesMachines, 2021
This paper systematically summarized the technical state of art and research results on the motion error of a linear guideway, corrected some misconceptions, and further clarified the relationship between the straightness error of the guide rail itself ...
Peng-Hao Hu, Ying-Jun Lei, Yang-Kai Ou
doaj   +1 more source

Parallel Mechanisms. Parallel CMM (Coordinate Measuring Machine Using Parallel Mechanism).

open access: yesJournal of the Japan Society for Precision Engineering, 1997
本解説では,座標測定機の種々の構成を紹介し,新しい座標測定機としてパラレルCMMの構成を考えた.しかし,4章に示したようにパラレルCMMの実用化には多くの課題が残されている.これを解決するためにはいくつかの基本的なアイデアの実用化が必要である.特に絶対的な校正の問題は,多関節タイプやスカラタイプの座標測定機を含めて大きな課題であると考えている.直交型の座標測定機が座標測定機として成熟しつつあることを考えると,パラレルCMMは,その高速性を生かしたり,小さくて高精度の座標測定を目指したり,逆に大きくて低価格な測定機を目指すなど,直交型の座標測定機とのうまい住み分けを目指す必要があると考えている.
Kiyoshi TAKAMASU, Masahiko HIRAKI
openaire   +2 more sources

Structural-Parametric Synthesis of the RoboMech Class Parallel Mechanism with Two Sliders

open access: yesApplied Sciences, 2021
This paper addresses the structural-parametric synthesis and kinematic analysis of the RoboMech class of parallel mechanisms (PM) having two sliders.
Zhumadil Baigunchekov   +5 more
doaj   +1 more source

Modeling and Analysis of a Novel 3R Parallel Compliant Mechanism

open access: yesMachines, 2023
This paper presents and investigates a new three-rotation (3R) parallel compliant mechanism that uses compliant rods to achieve three rotations. The mechanism is designed for use in pointing devices or as a spatial parallel manipulator.
Lanqing Pan   +3 more
doaj   +1 more source

Contact Quantization: Quantum Mechanics = Parallel transport [PDF]

open access: yesArchivum Mathematicum, 2018
Quantization together with quantum dynamics can be simultaneously formulated as the problem of finding an appropriate flat connection on a Hilbert bundle over a contact manifold. Contact geometry treats time, generalized positions and momenta as points on an underlying phase-spacetime and reduces classical mechanics to contact topology.
Herczeg G., Latini E., Waldron A.
openaire   +3 more sources

Type Synthesis and Analysis of a New Class of Bifurcation 3T2Rv Parallel Mechanisms With Variable/Invariable Rotational Axes

open access: yesIEEE Access, 2021
Since the parallel mechanism has many advantages, such as high strength, high precision and so on, many industrial applications require mechanisms with three-dimensional translational and two-dimensional rotational motion (3T2R), 3T2R parallel mechanisms
Xuyu Hu, Hongzhao Liu
doaj   +1 more source

Laser-induced quantum pumping in graphene [PDF]

open access: yes, 2012
We investigate non-adiabatic electron pumping in graphene generated by laser irradiation with linear polarization parallel or perpendicular to the transport direction.
Kohler, Sigmund   +3 more
core   +2 more sources

Design of a 3-DOF Parallel Manipulator to Compensate for Disturbances in Facade Cleaning

open access: yesIEEE Access, 2020
This paper proposes a three-degree-of-freedom manifold composed of three linear actuators. The proposed mechanism consists of a workspace suitable for facade cleaning and can compensate for the horizontal position from disturbances in a gondola-based ...
Garam Park   +4 more
doaj   +1 more source

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