Importance of collateral vessels in aortic coarctation: computer simulation at rest and exercise using transmission line elements

The dynamic responses of geared torsional systems are analyzed with the delay-bond graph technique. By transforming the power variables into torsional wave variables, the torsional elements are modeled as transmission line elements. The nonlinear elements, e.g., varying tooth stiffness, gear-tooth backlash, and nonlinear damping, are incorporated into the ideal transmission line element. A computational algorithm is established where the state variables of the system are expressed in terms of wave scattering variables and the dynamic responses are then obtained in both time and space domains. The simulation results of several simple examples of linear and nonlinear geared torsional systems are presented to demonstrate the feasibility of this algorithm.

Download Full-text

Resonator for microwave magnetoelectric effect

ITM Web of Conferences ◽

10.1051/itmconf/20193007012 ◽

2019 ◽

Vol 30 ◽

pp. 07012

Author(s):

Vyacheslav Lobekin ◽

Alexandr Tatarenko ◽

Andrei Belyshev ◽

Mirza Bichurin

Keyword(s):

Computer Simulation ◽

Transmission Line ◽

Ferromagnetic Resonance ◽

Ring Resonator ◽

Magnetoelectric Effect ◽

Frequency Characteristics ◽

Microstrip Transmission Line ◽

Microstrip Ring ◽

Microstrip Ring Resonator

The design of a ring resonator made on a microstrip transmission line is presented. A study of ferromagnetic resonance using this design was made. Computer simulation of a microstrip ring resonator was carried out, and amplitude-frequency characteristics were obtained.

Download Full-text

Computer Simulation of the Hydropower Stations With Long Pressurized Pipelines and Far Transmission Line

Volume 2: Fora ◽

10.1115/fedsm2008-55288 ◽

2008 ◽

Author(s):

Jianxu Zhou ◽

Chengmin Bi ◽

Ming Hu

Keyword(s):

Computer Simulation ◽

Transmission Line ◽

Water Flow ◽

Rapid Development ◽

Oscillation Mode ◽

Elastic Model ◽

Characteristic Analysis ◽

Training Tool ◽

Pressurized Pipelines ◽

Hydropower Stations

With the rapid development of automatic technology and computer science in the hydropower stations, the computer simulation system named as simulator is developed quickly and applied widely especially as a modern training tool for field operators. In the project of power transmission from west to east in Southwest China, there are lots of hydropower stations with long pressurized pipelines and far transmission line, so their simulators are more complex to be built correctly to show the characteristic of hydraulic-mechanical-electrical system and its dynamic procedure distinctly in real time. Based on the characteristic analysis of hydraulic system and long transmission system, a new easily-decoupled elastic model of water flow in pressurized pipelines is given and recommended, and its application and the choice of appropriate model order are analyzed considering the effect of power system, furthermore, how to build the model of far transmission line is discussed in detail based on its state equations. The results indicate that, in order to realize the truthfulness and robustness of the simulator, the higher order oscillation mode of water flow in long pressurized pipelines should be introduced and the frequency property of far transmission line should be analyzed.

Download Full-text

Computer Simulation of Transmission Line Model for Landfill Leakage Location

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.466-467.416 ◽

2012 ◽

Vol 466-467 ◽

pp. 416-420

Author(s):

Ya Yu Chen ◽

Zhen Chong Wang ◽

Chang Xin Nai ◽

Lu Dong

Keyword(s):

Computer Simulation ◽

Transmission Line ◽

Potential Distribution ◽

Waste Treatment ◽

Time Domain Reflectometry ◽

Leakage Detection ◽

Transmission Line Model ◽

Line Model ◽

Line Spacing ◽

Solid Waste Treatment

Landfill is the main means of solid waste treatment in China at present, and the layers will leak different extent in the laying time. It is essential to locate leakage. The paper raises the conception that the application of transmission line model in the landfill leakage detection, the commonly method of TDR (Time Domain Reflectometry) is introduced, the transmission line model of landfill leakage detection is established, and the formula of a single loophole model is deduced, the result of computer simulation for the transmission line in landfill leakage detection is given. For with the leakage or not, potential distribution is contrasted. From transmit frequency and transmission line spacing for the influence of potential distribution, we use comsol to simulate. The results show that, the transmission line can be an effective method to locate the leakage region in a landfill.

Download Full-text