scholarly journals Restricted polynomial induction versus parameter free ordinary induction

2022 ◽  
Author(s):  
Zofia Adamowicz
Keyword(s):  
Versus Parameter

Sensitivity Analysis

2021 ◽  
pp. 251-262
Author(s):  
Timothy E. Essington
Keyword(s):  
Sensitivity Analysis ◽  
Parameter Uncertainty ◽  
Monte Carlo Analysis ◽  
Interactive Effects ◽  
Structure Parameter ◽  
Ecological Processes ◽  
Individual Parameter ◽  
Global Sensitivity ◽  
Versus Parameter ◽  
Parameter Values

The chapter “Sensitivity Analysis” reviews why sensitivity analysis is a critical component of mathematical modeling, and the different ways of approaching it. A sensitivity analysis is an attempt to identify the parts of the model (i.e. structure, parameter values) that are most important for governing the output. It is an important part of modeling because it is used to quantify the degree of uncertainty in the model prediction and, in many cases, is the main goal of the model (i.e. the model was developed to identify the most important ecological processes). The chapter covers the idea of “local” versus “global” sensitivity analysis via individual parameter perturbation, and how interactive effects of parameters can be revealed via Monte Carlo analysis. Structural versus parameter uncertainty is also explained and explored.

scholarly journals Fortune or Virtue: Time-Variant Volatilities Versus Parameter Drifting in U.S. Data

2010 ◽  
Author(s):  
Jesús Fernández-Villaverde ◽  
Pablo Guerrón-Quintana ◽  
Juan Rubio-Ramírez
Keyword(s):  
Versus Parameter

Spatial variability versus parameter uncertainty in freshwater fate and exposure factors of chemicals

Chemosphere ◽  
2016 ◽  
Vol 149 ◽  
pp. 101-107 ◽  
Author(s):  
Carl O.P. Nijhof ◽  
Mark A.J. Huijbregts ◽  
Laura Golsteijn ◽  
Rosalie van Zelm
Keyword(s):  
Spatial Variability ◽  
Parameter Uncertainty ◽  
Versus Parameter

Simple Model for Interface Exciton with a Electron–Hole Separation

1998 ◽  
Vol 12 (21) ◽  
pp. 887-893 ◽  
Author(s):  
Ngo Van Thanh ◽  
Nguyen Ai Viet
Keyword(s):  
Main Parameter ◽  
Strong Dependence ◽  
Binding Energies ◽  
Oscillator Strengths ◽  
Bohr Radius ◽  
Electron Hole ◽  
Simple Theoretical Model ◽  
Hole Band ◽  
Versus Parameter ◽  
Good Agreement

The new simple theoretical model of Cooper1 for the interface exciton with an itinerant photo-excited hole is studied. The main parameter of the model is the separation d between electron and hole, which are assumed to be con ned in the two planes. By variational numerical calculation, we obtain the values of main parameters of the exciton: binding energies, effective Bohr radius, and oscillator strengths versus parameter d. Checking the applicable of the model, we find good agreement with the previous obtained results. We find also a strong dependence on the separation d and an existence of the "death region" of the exciton coursed by the hole band gap potential.

Uncertainty versus parameter in room acoustics. A case study

2014 ◽  
Vol 135 (4) ◽  
pp. 2205-2205
Author(s):  
Miguel Arana ◽  
Abel Arregui ◽  
Jorge Machin ◽  
Ricardo San Martin
Keyword(s):  
Room Acoustics ◽  
Versus Parameter

scholarly journals Fortune or Virtue: Time-Variant Volatilities Versus Parameter Drifting in U.S. Data

2010 ◽  
Author(s):  
Jesús Fernández-Villaverde ◽  
Pablo Guerron-Quintana ◽  
Juan Francisco Rubio-Ramirez
Keyword(s):  
Versus Parameter

HR XRD and Emission of InxGa1-xAs/GaAs quantum wells with embedded InAs quantum dots at the variation of InxGa1-xAs composition

2013 ◽  
Vol 1617 ◽  
pp. 13-18
Author(s):  
Leonardo G. Vega Macotela ◽  
Ricardo Cisneros Tamayo ◽  
Georgiy Polupan
Keyword(s):  
Quantum Dots ◽  
Quantum Wells ◽  
Technological Changes ◽  
Structural Effects ◽  
X Ray Diffraction ◽  
Inas Quantum Dots ◽  
X Ray ◽  
Versus Parameter ◽  
Physical Reasons ◽  
Elastic Strains

ABSTRACTThe high resolution X ray diffraction (HR-XRD) diagrams have been studied in the GaAs /InxGa1-xAs /In0.15Ga0.85As/GaAs quantum wells with embedded InAs quantum dots (QDs) in dependence on the composition of the capping InxGa1-xAs layers. The parameter x in capping InxGa1-xAs layers varied from the range 0.10-0.25. These technological changes have been accompanied by the variation non-monotonously of InAs QD emission. Numerical simulation of HR-XRD results has shown that the level of elastic strains and the composition of quantum layers vary none monotonously in studied QD structures. Simultaneously it was revealed that the process of Ga/In inter diffusion at the InxGa1-xAs/InAs QD interface are characterized by the dependence non monotonous versus parameter x in capping InxGa1-xAs layers. The physical reasons of the mentioned optical and structural effects in studied structures have been discussed.

scholarly journals The Attempt of the Low-Cycle Fatigue Life Description of Chosen Creep-Resistant Steels Under Mechanical and Thermal Interactions

2017 ◽  
Vol 62 (4) ◽  
pp. 2349-2353
Author(s):  
J. Okrajni ◽  
A. Marek
Keyword(s):  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Strain Range ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Plastic Strain Range ◽  
Mechanical Fatigue ◽  
Versus Parameter ◽  
Creep Resistant Steels

AbstractThe study focuses on the problem of determination of low-cycle fatigue properties for the chosen group of creep-resistant steels used in the power and chemical industries. It tries to find the parameter which would describe well the fatigue life and take into account mechanical loads and temperature. The results of LCF tests have been presented in the paper. New parameter P has been introduced. This parameter joins a plastic strain range, a stress range and temperature. The fatigue life has been predicted versus parameter P. The comparison of the predicted and observed values of fatigue life shows the agreement between these values. The method of fatigue life prediction formulated in this way is expected to describe the behavior of materials under thermo-mechanical fatigue.

scholarly journals Period Changes of W Ursae Majoris Stars

1977 ◽  
Vol 42 ◽  
pp. 393-397 ◽  
Author(s):  
J.M. Kreiner
Keyword(s):  
Astronomical Observatory ◽  
List Type ◽  
Type Number ◽  
Mass Ratio ◽  
Absolute Change ◽  
Versus Parameter ◽  
The Mean ◽  
Short Time

About 6000 times of minima for 120 W Ursae Majoris stars were collected by Mrs. Z. Frasińska and the writer in the Cracow Astronomical Observatory. From this material 15 O - C diagrams (fig. 1) with large number of minima were taken into consideration. Each of them covered more than 30,000 epochs. The analysis of O - C curves leads to the following conclusions: 1. The periods of all well-observed W UMa stars are variable.2. There are no “pure” parabolae in well-observed O - C curves.3. The periods change in a rather short time and then remain constant for 5,000 - 25,000 E (fig. 2).4. The number of increases and decreases of periods is approximately the same. The mean absolute change of period of 15 investigated stars amounts to 0.d00000365 = 0.P0000105. (The mean increase of period = 0.d00000386 = 0.P0000109, the mean decrease of period = 0.d00000349 = 0.P0000102).5. The mean absolute change of period for 15 investigated stars was plotted versus parameter q (mass ratio = m2/m1) (fig. 3). Systems with almost equal masses of stars have a tendency to show violent changes of period.

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