Rolling Centrifuge Repulsion Force Spacecraft

2018 ◽  
Author(s):  
Yan Cao
Keyword(s):  
Repulsion Force

Controlling detachment residue via magnetic repulsion force

2021 ◽  
Vol 118 (19) ◽  
pp. 191601
Author(s):  
M. Jamali ◽  
K. S. Mehta ◽  
H. Holweger ◽  
M. M. Amrei ◽  
H. V. Tafreshi
Keyword(s):  
Repulsion Force

scholarly journals INS/gravity gradient aided navigation based on gravitation field particle filter

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 709-718
Author(s):  
Fanming Liu ◽  
Fangming Li ◽  
Xin Jing
Keyword(s):  
Particle Filter ◽  
Inertial Navigation System ◽  
Attractive Force ◽  
Gravity Gradient ◽  
Experimental Conditions ◽  
Gravitation Field ◽  
Disk Model ◽  
Swarm Optimization ◽  
Repulsion Force ◽  
Position Estimate

Abstract Swarm intelligence method is an effective way to improve the particle degradation and sample depletion of the traditional particle filter. This paper proposes a particle filer based on the gravitation field algorithm (GF-PF), and the gravitation field algorithm is introduced into the resampling process to improve particle degradation and sample depletion. The gravitation field algorithm simulates the solar nebular disk model, and introduces the virtual central attractive force and virtual rotation repulsion force between particles. The particles are moves rapidly to the high-likelihood region under action of the virtual central attractive force. The virtual rotation repulsion force makes the particles keep a certain distance from each other. These operations improve estimation performance, avoid overlapping of particles and maintain the diversity of particles. The proposed method is applied into INS/gravity gradient aided navigation, by combining the sea experimental data of an inertial navigation system. Compared with the particle swarm optimization particle filter(PSO-PF) and artificial physics optimized particle filter (APO-PF), the GF-PF has higher position estimate accuracy and faster convergence speed with the same experimental conditions.

scholarly journals Hibrid Motor with Axial Coil using Attraction and Repulsion Force.

1996 ◽  
Vol 116 (2) ◽  
pp. 218-219
Author(s):  
Kenichi Fukuoka ◽  
Nuio Tsuchida ◽  
Kouji Imai
Keyword(s):  
Repulsion Force

scholarly journals Simulation of Evacuation Characteristics Using a 2-Dimensional Cellular Automata Model for Pedestrian Dynamics

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Liqiang Ji ◽  
Yongsheng Qian ◽  
Junwei Zeng ◽  
Min Wang ◽  
Dejie Xu ◽  
...  
Keyword(s):  
Cellular Automata ◽  
High Density ◽  
Force Model ◽  
Environment Interaction ◽  
Social Force ◽  
Public Places ◽  
Pedestrian Dynamics ◽  
Repulsion Force ◽  
The People ◽  
Ca Model

In public places, the high pedestrian density is one of the direct causes leading to crowding and trample disaster, so it is very necessary to investigate the collective and evacuation characteristics for pedestrian movement. In the occupants’ evacuation process, the people-people interaction and the people-environment interaction are sufficiently considered in this paper, which have been divided into the exit attraction, the repulsion force between people, the friction between people, the repulsion force between human and barrier, and the attraction of surrounding people. Through analyzing the existing models, a new occupant evacuation cellular automata (CA) model based on the social force model is presented, which overcomes the shortage of the high density crowd simulation and combines the advantages that CA has sample rules and faster calculating speed. The simulating result shows a great applicability for evacuation under the high density crowd condition, and the segregation phenomena have also been found in the bidirectional pedestrian flow. Besides these, setting isolated belt near the exit or entrance of underpass not only remarkably decreases the density and the risk of tramper disaster but also increases the evacuation efficiency, so it provides a new idea for infrastructure design about the exits and entrances.

scholarly journals Antigravity, an Answer to Nature’s Phenomena including the Expansion of the Universe

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
C. K. Gamini Piyadasa
Keyword(s):  
Scientific Reasoning ◽  
Gravitational Force ◽  
Gravitational Attraction ◽  
Attraction Force ◽  
Heavy Particles ◽  
Slowing Down ◽  
Repulsion Force ◽  
Gravitational Repulsion ◽  
Expansion Of The Universe ◽  
The Universe

The gravitational attraction force being proportional to the mass has been experimentally shown for several hundred years now, but no gravitational repulsion has been identified within the accepted scientific reasoning. Here, we show that the gravitational repulsion force, similar to the gravitational attraction among particles has also been in existence in nature but, yet to be recognized. The results of experiments are shown in detail and are discussed in the recent series of-publications. It is also shown here that this gravitational repulsion force is proportional to the temperature which is an indicator of thermal energy of the particle, similar to the gravitational attraction that is proportional to the mass of the particle. The situations where heavy particles such as iodine, tungsten, and thorium in vacuum move against gravitational force have already been shown qualitatively. The increase in time-of-fall of water droplets (slowing down of fall) with rise in temperature is also quantitatively discussed. This article discusses two major phenomena observable in nature, clouds and the expansion of universe, which could be more preciously explained by the concept of antigravity.

Osmotic repulsion force due to adsorbed surfactants

2012 ◽  
Vol 91 ◽  
pp. 137-143 ◽  
Author(s):  
Alexander J. Babchin ◽  
Laurier L. Schramm
Keyword(s):  
Repulsion Force
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