Novel control and steady-state correction method for standard 28-day bioaccumulation tests using Nereis virens

2011 ◽  
Vol 30 (6) ◽  
pp. 1366-1375 ◽  
Author(s):  
Erin R. Bennett ◽  
Jeffery A. Steevens ◽  
Guilherme R. Lotufo ◽  
Gord Paterson ◽  
Ken G. Drouillard
Keyword(s):  
Steady State ◽  
Correction Method ◽  
Nereis Virens

scholarly journals Steady State Analysis and Optimization for AUV Using Washout Filter Root Locus Correction Method

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 143127-143138 ◽  
Author(s):  
Peng Liu ◽  
Chao Xin ◽  
Yonghong Liu ◽  
Baoping Cai ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Steady State ◽  
Correction Method ◽  
Root Locus ◽  
Steady State Analysis ◽  
Washout Filter ◽  
State Analysis

scholarly journals Investigation of Analysis Methods for Pulse Decay Tests Considering Gas Adsorption

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2562 ◽  
Author(s):  
Guofeng Han ◽  
Yang Chen ◽  
Xiaoli Liu
Keyword(s):  
Steady State ◽  
Gas Adsorption ◽  
Correction Method ◽  
Flow Coefficient ◽  
Dual Porosity ◽  
Unsteady State ◽  
Equilibrium Sorption ◽  
Adsorbed Phase ◽  
Decay Tests ◽  
Non Equilibrium

The pulse decay test is the main method employed to determine permeability for tight rocks, and is widely used. The testing gas can be strongly adsorbed on the pore surface of unconventional reservoir cores, such as shale and coal rock. However, gas adsorption has not been well considered in analysis pulse decay tests. In this study, the conventional flow model of adsorbed gas in porous media was modified by considering the volume of the adsorbed phase. Then, pulse decay tests of equilibrium sorption, unsteady state and pseudo-steady-state non-equilibrium sorption models, were analyzed by simulations. For equilibrium sorption, it is found that the Cui-correction method is excessive when the adsorbed phase volume is considered. This method is good at very low pressure, and is worse than the non-correction method at high pressure. When the testing pressure and Langmuir volume are large and the vessel volumes are small, a non-negligible error exists when using the Cui-correction method. If the vessel volumes are very large, gas adsorption can be ignored. For non-equilibrium sorption, the pulse decay characteristics of unsteady state and pseudo-steady-state non-equilibrium sorption models are similar to those of unsteady state and pseudo-steady-state dual-porosity models, respectively. When the upstream and downstream pressures become equal, they continue to decay until all of the pressures reach equilibrium. The Langmuir volume and pressure, the testing pressure and the porosity, affect the pseudo-storativity ratio and the pseudo-interporosity flow coefficient. Their impacts on non-equilibrium sorption models are similar to those of the storativity ratio and the interporosity flow coefficient in dual-porosity models. Like dual-porosity models, the pseudo-pressure derivative can be used to identify equilibrium and non-equilibrium sorption models at the early stage, and also the unsteady state and pseudo-steady-state non-equilibrium sorption models at the late stage. To identify models using the pseudo-pressure derivative at the early stage, the suitable vessel volumes should be chosen according to the core adsorption property, porosity and the testing pressure. Finally, experimental data are analyzed using the method proposed in this study, and the results are sufficient.

Steady-State Analysis of Hysteretic Magnetic Field Problems Using a Parallel Time-Periodic Explicit-Error Correction Method

2017 ◽  
Vol 53 (6) ◽  
pp. 1-4 ◽  
Author(s):  
Yasuhito Takahashi ◽  
Junji Kitao ◽  
Koji Fujiwara ◽  
Akira Ahagon ◽  
Tetsuji Matsuo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Steady State ◽  
Error Correction ◽  
Correction Method ◽  
Steady State Analysis ◽  
Parallel Time ◽  
Error Correction Method ◽  
Time Periodic ◽  
State Analysis

Correction Method for Ion Yield Transients in the Near Surface Region of Sims Depth Profiles

1985 ◽  
Vol 54 ◽  
Author(s):  
S. R. Bryan ◽  
R. W. Linton ◽  
D. P. Griffis
Keyword(s):  
Steady State ◽  
Secondary Ion Mass Spectrometry ◽  
High Sensitivity ◽  
Depth Resolution ◽  
Surface Region ◽  
Correction Method ◽  
Ion Concentration ◽  
Near Surface ◽  
Ion Yields ◽  
Secondary Ion

As solid state device features continue to decrease in size, it has become more important to characterize dopant concentrations within the first several hundred angstroms of the surface. Secondary ion mass spectrometry (SIMS) is the technique of choice for dopant depth profiling due to its high sensitivity and good depth resolution. In order to increase the sensitivity of SIMS, electropositive elements (e.g. oxygen) or electronegative elements (e.g. cesium) are used as primary ion species to enhance positive or negative secondary ion yields, respectively. This has the disadvantage, however, of causing secondary ion yields to vary by up to several orders of magnitude over the first few hundred angstroms of a depth profile as the implanted primary ion concentration increases [1,2]. Secondary ion yields stabilize once the primary ion reaches a steady state concentration, which occurs at a depth proportional to the range of the primary ions in the solid. This ion yield transient artifact hinders quantification of dopant concentrations until the primary ion concentration reaches steady state.

Convergence Acceleration in Steady State Analysis of Synchronous Machines Using Time-Periodic Explicit Error Correction Method

2011 ◽  
Vol 47 (5) ◽  
pp. 1422-1425 ◽  
Author(s):  
Yasuhito Takahashi ◽  
Hiroyuki Kaimori ◽  
Akihisa Kameari ◽  
Tadashi Tokumasu ◽  
Masafumi Fujita ◽  
...  
Keyword(s):  
Steady State ◽  
Error Correction ◽  
Convergence Acceleration ◽  
Correction Method ◽  
Synchronous Machines ◽  
Steady State Analysis ◽  
Error Correction Method ◽  
Time Periodic ◽  
State Analysis

scholarly journals Correction for Intravascular Activity in the Oxygen-15 Steady-State Technique is Independent of the Regional Hematocrit

1987 ◽  
Vol 7 (3) ◽  
pp. 372-374 ◽  
Author(s):  
Adriaan A. Lammertsma ◽  
Jean-Claude Baron ◽  
Terry Jones
Keyword(s):  
Carbon Monoxide ◽  
Steady State ◽  
Metabolic Rate ◽  
Molecular Oxygen ◽  
Correction Method ◽  
Large Vessel ◽  
Cerebral Metabolic Rate ◽  
State Technique ◽  
Additional Procedure

The oxygen-15 steady-state technique to measure the regional cerebral metabolic rate for oxygen requires a correction for the nonextracted intravascular molecular oxygen-15. To perform this correction, an additional procedure is carried out using RBCs labeled with 11CO or C15O. The previously reported correction method, however, required knowledge of the regional cerebral to large vessel hematocrit ratio. A closer examination of the underlying model eliminated this ratio. Both molecular oxygen and carbon monoxide are carried by RBCs and are therefore similarly affected by a change in hematocrit.

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