Transient Behavior during Electrodeposition onto a Metal Strip of High Ohmic Resistance

1971 ◽  
Vol 118 (12) ◽  
pp. 1935 ◽  
Author(s):  
Richard Alkire
Keyword(s):  
Transient Behavior ◽  
Metal Strip ◽  
Ohmic Resistance ◽  
High Ohmic Resistance

Lack of electrical interaction between proximal bundle branches and subjacent muscle

1977 ◽  
Vol 42 (2) ◽  
pp. 235-239 ◽  
Author(s):  
D. A. Lathrop ◽  
J. C. Bailey
Keyword(s):  
Muscle Activation ◽  
Ohmic Resistance ◽  
Voltage Change ◽  
Transmembrane Voltage ◽  
Electrotonic Interactions ◽  
Current Threshold ◽  
Spontaneous Frequency ◽  
Microelectrode Techniques ◽  
High Ohmic Resistance ◽  
Septal Myocardium

Microelectrode techniques were used to assess the importance of subthreshold electrotonic interactions between the canine proximal bundle branches and adjacent septal myocardium, and vice versa. Bundle branch action potential duration, maximal rising velocity of phase O, current threshold requirements for all-or-none depolarization, transmembrane voltage, and spontaneous frequency were not altered by adjacent septal muscle activation. Activation of the proximal bundle branches did not change the transmembrane voltage of immediately subjacent muscle cells; likewise, all-or-none activation of ventricular septal muscle did not effect a voltage change in the overlying proximal bundle branches. We conclude that a high ohmic resistance barrier between proximal bundle branch and subjacent muscle precludes significant electrotonic interactions between these neighboring structures.

scholarly journals A Transient Behavior Study of Polymer Electrolyte Fuel Cells with Cyclic Current Profiles

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2370 ◽  
Author(s):  
Yan Shi ◽  
Holger Janßen ◽  
Werner Lehnert
Keyword(s):  
Pressure Drop ◽  
Polymer Electrolyte ◽  
Current Density ◽  
Cell Voltage ◽  
Transient Behavior ◽  
Polymer Electrolyte Fuel Cell ◽  
Constant Current ◽  
Two Phase ◽  
Constant Current Density ◽  
Ohmic Resistance

This paper reports on the effects of different load profiles on the transient behavior of a polymer electrolyte fuel cell (PEFC). A protocol of six tests, each with different current density ramps, was conducted. The corresponding cell voltage, pressure drop response, and ohmic resistance were then experimentally investigated. The time-dependent voltage profiles were applied to represent the cell performance. The cathodic pressure drop and ohmic resistance were utilized to analyze the water dynamic behavior inside the cell. The voltage overshoot and undershoot behavior were observed throughout the experiment. It was found that with an increase of the current change rates, the magnitude of voltage over/undershoots also increased. When the holding time at the constant current density was zero, the overshoot or undershoot behavior disappeared. The results of the pressure drop analysis showed that the load ramp did not have a significant effect on the average pressure drop in the tests. During the load cyclic operation in each test, the two-phase flow tended to reach equilibrium in the cell. Impedance analysis showed that the ohmic resistance changed with the change in the current density; however, the difference between the tests was not obvious.

Flame Deposition of the Electrolyte and Cathode for High and Stable Performance of Low-Temperature SOFCs

2010 ◽  
Author(s):  
Radenka Maric ◽  
Roberto Neagu ◽  
Ye Zhang-Steenwinkel ◽  
Frans P. F. van Berkel ◽  
Bert Rietveld
Keyword(s):  
Peak Power ◽  
Spray Deposition ◽  
Peak Power Output ◽  
Ohmic Resistance ◽  
Stable Performance ◽  
High Vapor ◽  
Cost Efficient ◽  
The Cost ◽  
High Ohmic Resistance ◽  
Deposition Technology

The key obstacles to the development of low operating temperature (LT) SOFCs are high ohmic resistance and high electrode overpotentials. In the present work, we demonstrate excellent cell performance at 600 °C on a anode supported bi-layer electrolyte SOFC having a thin RSDT-made cerium gadolinium oxide (Gd0.2Ce0.8O2−δ, CGO) and a lanthanum strontium cobaltite (La0.6Sr0.4CoO3−δ, LSC) perovskite cathode. The measured ohmic resistance of the ASE cell with CGO layer deposited by RSDT was 0.24 ohm.cm2, which is close to the expected theoretical value of 0.17 ohm.cm2 for a 5 micron thick 8YSZ electrolyte at 600 °C. This indicates that the obtained peak power output density is approaching what is theoretically possible. This work is based on the lab scale use of Reactive Spray Deposition Technology (RSDT) which is an open atmosphere, cost efficient technique that does not require high vapor precursors and is an effective way to deposit thin ceramic layers of YSZ/CGO/LSC onto Ni-YSZ substrates. It has the potential to chain successive coating steps thus, significantly simplifying the production of multilayered ceramic structures as the SOFCs and reducing the cost associated with manufacturing of the cells.

An Analytical Transient Tire Model

2001 ◽  
Vol 29 (2) ◽  
pp. 108-132 ◽  
Author(s):  
A. Ghazi Zadeh ◽  
A. Fahim
Keyword(s):  
Transient Behavior ◽  
Stability Control ◽  
Vehicle Stability ◽  
Tire Model ◽  
Steering Angle ◽  
First Order ◽  
Vehicle Stability Control ◽  
Proposed Model ◽  
Depth Study ◽  
And Performance

Abstract The dynamics of a vehicle's tires is a major contributor to the vehicle stability, control, and performance. A better understanding of the handling performance and lateral stability of the vehicle can be achieved by an in-depth study of the transient behavior of the tire. In this article, the transient response of the tire to a steering angle input is examined and an analytical second order tire model is proposed. This model provides a means for a better understanding of the transient behavior of the tire. The proposed model is also applied to a vehicle model and its performance is compared with a first order tire model.

A Modular Race Tire Model Concerning Thermal and Transient Behavior using a Simple Contact Patch Description

2013 ◽  
Vol 41 (4) ◽  
pp. 232-246
Author(s):  
Timo Völkl ◽  
Robert Lukesch ◽  
Martin Mühlmeier ◽  
Michael Graf ◽  
Hermann Winner
Keyword(s):  
Load Distribution ◽  
Thermal Condition ◽  
Transient Behavior ◽  
Wheel Load ◽  
Contact Patch ◽  
Fundamental Parameters ◽  
Dry Conditions ◽  
Simple Contact ◽  
Tire Forces ◽  
Descriptive Set

ABSTRACT The potential of a race tire strongly depends on its thermal condition, the load distribution in its contact patch, and the variation of wheel load. The approach described in this paper uses a modular structure consisting of elementary blocks for thermodynamics, transient excitation, and load distribution in the contact patch. The model provides conclusive tire characteristics by adopting the fundamental parameters of a simple mathematical force description. This then allows an isolated parameterization and examination of each block in order to subsequently analyze particular influences on the full model. For the characterization of the load distribution in the contact patch depending on inflation pressure, camber, and the present force state, a mathematical description of measured pressure distribution is used. This affects the tire's grip as well as the heat input to its surface and its casing. In order to determine the thermal condition, one-dimensional partial differential equations at discrete rings over the tire width solve the balance of energy. The resulting surface and rubber temperatures are used to determine the friction coefficient and stiffness of the rubber. The tire's transient behavior is modeled by a state selective filtering, which distinguishes between the dynamics of wheel load and slip. Simulation results for the range of occurring states at dry conditions show a sufficient correlation between the tire model's output and measured tire forces while requiring only a simplified and descriptive set of parameters.

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