Results 1 to 10 of about 737,129 (310)
Comparing Push and Pull Factors Affecting Migration
Economies, 2022 The purpose of this research was to conduct a comparison of the push and pull factors affecting migration between Poland and Romania. The study aimed to find out which among the push and pull factors have a greater effect overall and individually on the ...
Mariusz Urbanski, Urbanski Mariusz
exaly +2 more sources
Energy and Built Environment, 2020 Push-pull ventilation systems provide excellent control of contaminants and harmful gases. However, since both a push inlet and a pull outlet are used in the push-pull ventilation system, the flow rate required by the system is large.
Yi Wang, Yingxue Cao
exaly +3 more sources
Periodic solutions and the avoidance of pull‐in instability in nonautonomous microelectromechanical systems [PDF]
Mathematical methods in the applied sciences, 2020 We study periodic solutions of a one‐degree of freedom microelectromechanical system (MEMS) with a parallel‐plate capacitor under T‐periodic electrostatic forcing.
S. Kadyrov +4 more
semanticscholar +1 more source
A fractal micro-electromechanical system and its pull-in stability
Journal of Low Frequency Noise Vibration and Active Control, 2021 Pull-in instability occurs in a micro-electromechanical system, and it greatly hinders its normal operation. A fractal modification is suggested to make the system stable in all operation period. A fractal model is established using a fractal derivative,
Dan Tian, Chun-Hui He
semanticscholar +1 more source
Actuators, 2023 This paper presents the results of a comprehensive study of the pull-in phenomenon in the hybrid levitation microactuator (HLMA), in which square-shaped proof masses (PMs) of different sizes, namely, length sides of 2.8 and 3.2 mm and thicknesses of 25 ...
Emil R. Mamleyev +4 more
doaj +1 more source
Frontiers in Robotics and AI, 2021 This paper proposes an underactuated grippers mechanism that grasps and pulls in different types of objects. These two movements are generated by only a single actuator while two independent actuators are used in conventional grippers.
A. Kakogawa, Yuki Kaizu, Shugen Ma
semanticscholar +1 more source
Actuators, 2021 In this paper, a novel photovoltaic-electrostatic hybrid actuator with a slant lower electrode based on the PLZT ceramic is proposed. The mathematical model of photovoltaic-electrostatic hybrid actuator is established.
Zhen Lv +3 more
doaj +1 more source
Finite Element Solutions of Cantilever and Fixed Actuator Beams Using Augmented Lagrangian Methods [PDF]
Journal of Applied and Computational Mechanics, 2018 In this paper we develop a numerical procedure using finite element and augmented Lagrangian meth-ods that simulates electro-mechanical pull-in states of both cantilever and fixed beams in microelectromechanical systems (MEMS) switches.
Dongming Wei, Xuefeng Li
doaj +1 more source
Fractal Pull-in Stability Theory for Microelectromechanical Systems
Frontiers in Physics, 2021 Pull-in instability was an important phenomenon in microelectromechanical systems (MEMS). In the past, MEMS were usually assumed to work in an ideal environment.
Dan Tian +3 more
doaj +1 more source