On the Zener–Hollomon Parameter, Multi-Layer Perceptron and Multivariate Polynomials in the Struggle for the Peak and Steady-State Description
Abstract
:1. Introduction
2. Materials and Methods
2.1. Acquiring of Experimental Hot Flow Curve Dataset
2.2. Flow Curve Description
2.2.1. Peak and Steady-State Description via Zener–Hollomon Parameter
2.2.2. Peak and Steady-State Description via Multi-Layer Perceptron Network
2.2.3. Peak and Steady-State Description via Multivariate Polynomials
3. Results and Discussion
3.1. Experimental Dataset
3.2. Evaluation of the Peak and Steady-State Description
3.3. Evaluation of the Flow Curve Description
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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MLP Architecture Feature | εp | σp | σss |
---|---|---|---|
Overall number of layers | 4 | 3 | 3 |
Number of perceptrons in layers | 2—2—2—1 | 2—1—1 | 2—1—1 |
Hidden layers activation function | tansig 1 | tansig 1 | tansig 1 |
Summary layer activation function | purelin 2 | purelin 2 | purelin 2 |
Coordinate | A (s−1) | a (s) | b (-) | n (-) | Q (kJ·mol−1) | α (MPa−1) |
---|---|---|---|---|---|---|
σp | 1.565 × 1013 | 4.012 × 100 | 3.735 × 102 | 1.267 × 10−2 | ||
σss | 3.145 × 1012 | 3.856 × 100 | 3.433 × 102 | 1.181 × 10−2 | ||
εp | 8.410 × 10−3 | 1.078 × 10−1 |
wil−1,jl | εp | wil−1,jl | εp | bjl | εp |
---|---|---|---|---|---|
w11,12 | −6.229 × 10−1 | w12,23 | −1.059 × 10−3 | b12 | −5.415 × 10−1 |
w11,22 | 4.530 × 10−3 | w22,13 | −4.050 × 10−1 | b22 | −1.695 × 10−1 |
w21,12 | 2.927 × 10−1 | w22,23 | 1.450 × 10−3 | b13 | 2.561 × 10−3 |
w21,22 | −4.224 × 10−1 | w13,14 | 5.994 × 10−1 | b23 | −9.288 × 10−4 |
w12,13 | 5.390 × 10−1 | w23,14 | −2.022 × 10−3 | b14 | 4.047 × 10−1 |
wil−1,jl | σp | σss | bjl | σp | σss |
---|---|---|---|---|---|
w11,12 | −5.530 × 10−1 | −6.036 × 10−1 | b12 | −4.199 × 10−1 | −5.019 × 10−1 |
w21,12 | 4.144 × 10−1 | 4.923 × 10−1 | b13 | 1.644 × 102 | 1.588 × 102 |
w12,13 | 1.571 × 102 | 1.490 × 102 |
aij | εp | σp | σss | aij | εp | σp | σss |
---|---|---|---|---|---|---|---|
a00 | 6.968 × 106 | −1.884 × 107 | −7.455 × 106 | a20 | −6.375 × 100 | −7.559 × 100 | −2.078 × 100 |
a01 | 4.275 × 106 | −1.156 × 107 | −4.572 × 106 | a21 | −3.910 × 100 | −4.635 × 100 | −1.271 × 100 |
a02 | −1.914 × 106 | 5.174 × 106 | 2.048 × 106 | a22 | 1.751 × 100 | 2.076 × 100 | 5.703 × 10−1 |
a03 | −5.458 × 105 | 1.476 × 106 | 5.838 × 105 | a23 | 4.993 × 10−1 | 5.918 × 10−1 | 1.624 × 10−1 |
a10 | 1.566 × 100 | −1.354 × 101 | −1.363 × 101 | a30 | −3.964 × 100 | −5.850 × 100 | −7.003 × 100 |
a11 | 1.040 × 100 | −1.072 × 101 | −1.258 × 101 | a31 | −2.432 × 100 | −3.589 × 100 | −4.296 × 100 |
a12 | −4.671 × 10−1 | 4.483 × 100 | 3.880 × 100 | a32 | 1.089 × 100 | 1.607 × 100 | 1.924 × 100 |
a13 | −1.342 × 10−1 | 1.434 × 100 | 1.404 × 100 | a33 | 3.105 × 10−1 | 4.583 × 10−1 | 5.486 × 10−1 |
Parameter | a1 (-) | a2 (-) | a3 (K) | a4 (K−1) | R2 (-) |
---|---|---|---|---|---|
c | 7.183 × 10−2 | −4.964 × 10−1 | −5.720 × 102 | −1.090 × 10−3 | 0.8647 |
n | 3.109 × 100 | 3.701 × 10−1 | 4.623 × 102 | 4.558 × 10−4 | 0.4757 |
k | 1.205 × 100 | 3.227 × 10−1 | 3.311 × 102 | −2.369 × 10−4 | 0.4375 |
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Opěla, P.; Kawulok, P.; Schindler, I.; Kawulok, R.; Rusz, S.; Navrátil, H. On the Zener–Hollomon Parameter, Multi-Layer Perceptron and Multivariate Polynomials in the Struggle for the Peak and Steady-State Description. Metals 2020, 10, 1413. https://doi.org/10.3390/met10111413
Opěla P, Kawulok P, Schindler I, Kawulok R, Rusz S, Navrátil H. On the Zener–Hollomon Parameter, Multi-Layer Perceptron and Multivariate Polynomials in the Struggle for the Peak and Steady-State Description. Metals. 2020; 10(11):1413. https://doi.org/10.3390/met10111413
Chicago/Turabian StyleOpěla, Petr, Petr Kawulok, Ivo Schindler, Rostislav Kawulok, Stanislav Rusz, and Horymír Navrátil. 2020. "On the Zener–Hollomon Parameter, Multi-Layer Perceptron and Multivariate Polynomials in the Struggle for the Peak and Steady-State Description" Metals 10, no. 11: 1413. https://doi.org/10.3390/met10111413