1 Introduction
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A novel idea called velocity pausing is proposed where particles are provided with a third movement option (besides faster or slower speeds as in the classical PSO algorithm) that allows them to move with the same velocity as they did in the previous iteration.
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The proposed VPPSO algorithm modifies the first term of the classical PSO velocity equation to to avoid premature convergence.
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To maintain diversity, a two-swarm strategy is implemented where particles in the first swarm update their positions based on the classical PSO algorithm, whereas the remaining particles follow the global best position only to update their positions.
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A comprehensive comparison analysis that validates the effectiveness of VPPSO is carried out. The performance of VPPSO is evaluated on 23 classical benchmark functions, the CEC2019 test suite, the CEC2020 test functions and 4 real-world engineering problems. The performance of VPPSO on high-dimensional problems is also evaluated. VPPSO is compared with PSO, a recent high-performance PSO variant and five recent prominent metaheuristic algorithms.
Algorithm | Contribution(s) | High-dimensional problems | Benchmark functions | Statistical test(s) | Engineering problems | FEs |
---|---|---|---|---|---|---|
Two-swarm learning PSO (TSLPSO) [73] | Dimensional learning and comprehensive learning strategies | No | 16 functions and CEC2014 | Yes | Yes | \(3\times 10^5\) |
PSO-ALS [74] | An adaptive learning strategy | No | 15 functions and CEC2017 | Yes | Yes | \(2\times 10^5\) |
Expanded PSO (XPSO) [72] | Multiple exemplars and forgetting ability | No | CEC2013 | Yes | No | 10000D |
Triple archives PSO (TAPSO) [75] | A three archives strategy | No | 30 classical functions | Yes | Yes | 10000D |
Novel social learning PSO (NSLPSO) [68] | A new social learning strategy | No | CEC2013 | Yes | No | 10000D |
Pyramid PSO [76] | Novel cooperation and competition strategies | No | CEC2013 and CEC2017 | Yes | No | 10000D |
Multi-population cooperative PSO (MPCPSO) [54] | Multi-dimensional comprehensive learning approach | Yes | 16 classical functions | No | No | 200,000 |
Bee-foraging learning PSO (BFL-PSO) [77] | Integration of PSO and artificial bee colony algorithm | No | CEC2014 | Yes | Yes | 10000D |
Generalized PSO (GEPSO) [33] | Modification of the velocity equation | No | 16 classical functions | No | No | 10,000 |
Adaptive strategy PSO (ASPSO) [78] | PSO is hybridized with an adaptive strategy | No | CEC2017 | Yes | Yes | 50,000 |
PSO+ [69] | A new particles update strategy | No | 24 classical functions | Yes | Yes | 30,000 |
Function | Range |
\(f_{\min }\)
|
---|---|---|
\(f_1(x) =\sum _{i=1}^{n}x_i^2\)
| [\(-100\),100] | 0 |
\(f_2(x)=\sum _{i=1}^{n}\mid {x_i}\mid +\prod _{i=1}^{n}\mid {x_i}\mid\)
| [\(-10\),10] | 0 |
\(f_3(x)=\sum _{i=1}^{n}(\sum _{j-1}^{i}x_j)^2\)
| [\(-100\),100] | 0 |
\(f_4(x)=max_i\{ \mid {x_i} \mid ,1\le {i}\le {n}\}\)
| [\(-100\),100] | 0 |
\(f_5(x)=\sum _{i=1}^{n-1}[100(x_{i+1}-x_i^2)^2+(x_i-1)^2]\)
| [\(-30\),30] | 0 |
\(f_6(x)=\sum _{i=1}^{n}([x_i+0.5])^2\)
| [\(-100\),100] | 0 |
\(f_7(x)=\sum _{i=1}^{n}ix_i^4+random[0,1)\)
| [\(-1.28\),1.28] | 0 |
2 Literature review
Function | Range |
\(f_{\min }\)
|
---|---|---|
\(f_8(x)=\sum _{i=1}^{n}-x_isin(\sqrt{\mid {x_i}\mid })\)
| [−500,500] |
\(-418.9829\times {Dim}\)
|
\(f_9(x)=\sum _{i=1}^{n}[x_i^2-10cos(2{\pi }x_i)+10]\)
| [−5.12,5.12] | 0 |
\(\begin{aligned} f_{10}(x)=&-20exp\left( -0.2\sqrt{\frac{1}{n}\sum _{i=1}^{n}x_i^2}\right) \\&-exp\left( \frac{1}{n}\sum _{i=1}^{n}cos(2{\pi }x_i)\right) +20+e \end{aligned}\)
| [−32,30] | 0 |
\(f_{11}(x)=\frac{1}{4000}\sum _{i=1}^{n}x_i^2-\prod _{i=1}^{n}cos\left( \frac{x_i}{\sqrt{i}}\right) +1\)
| [−600,600] | 0 |
\(\begin{aligned} f_{12}(x)=&\frac{\pi }{n}\{10sin\left( \pi {y_1}\right) +\sum _{i=1}^{n-1}\left( y_i-1\right) ^2\left[ 1+10sin^2\left( \pi {y_i+1}\right) \right] \\&+\left( y_n-1\right) ^2+\sum _{i=1}^{n}u\left( x_i,10,100,4\right) \}\end{aligned}\)
| [−50,50] | 0 |
\(y_i=1+\frac{x_i+1}{4}\)
| ||
\(u(x_i,a,k,m)= {\left\{ \begin{array}{ll} k\left( x_i-a\right) ^m & x_i>a\\ 0 & -a<x_i<a\\ k\left( -x_i-a\right) ^m & x_i<-a \end{array}\right. }\)
| ||
\(\begin{aligned} f_{13}(x)=&0.1\{sin^2\left( 3\pi {x_1}\right) +\sum _{i=1}^{n}\left( x_i-1\right) ^2 [1+sin^2\left( 3\pi {x_i+1}\right) ]\\&+\left( x_n-1\right) ^2[1+sin^2\left( 2\pi {x_n}\right) ]\} +\sum _{i=1}^{n}u\left( x_i,5,100,4\right) \end{aligned}\)
| [−50,50] | 0 |
Function | Dim | Range |
\(f_{\min }\)
|
---|---|---|---|
\(f_{14}(x)=\left( \frac{1}{500}+\sum _{j=1}^{25}\frac{1}{j+\sum _{i=1}^{2}(x_i-a_{ij})^6}\right) ^{-1}\)
| 2 | [\(-\)65,65] | 1 |
\(f_{15}(x)=\sum _{i=1}^{11}\left[ a_i-\frac{x_1(b_i^2+b_ix_2)}{b_i^2+b_ix_3+x_4}\right] ^2\)
| 4 | [−5,5] | 0.00030 |
\(f_{16}(x)=4x_1^2-2.1x_1^4+\frac{1}{3}x_1^6+x_1x_2-4x_2^2+4x_2^4\)
| 2 | [−5,5] | −1.0316 |
\(f_{17}(x)=\left( x_2-\frac{5.1}{4{\pi }^2}x_1^2+\frac{5}{{\pi }}x_1-6\right) ^2+10\left( 1-\frac{1}{8{\pi }}\right) cosx_1+10\)
| 2 | [−5,5] | 0.398 |
\(\begin{aligned}f_{18}(x)=&\left[ 1+(x_1+x_2+1)^2(19-14x_1+3x_1^2-14x_2+6x_1x_2+3x_2^2)\right] \\ &\times \left[ 30+(2x_1-3x_2)^2\times (18-32x_1+12x_1^2+48x_2-36x_1x_2+27x_2^2)\right] \end{aligned}\)
| 2 | [−2,2] | 3 |
\(f_{19}(x)=-\sum _{i=1}^{4}c_iexp\left( -\sum _{j=1}^{3}a_{ij}(x_j-p_{ij})^2\right)\)
| 3 | [1,3] | \(-\)3.86 |
\(f_{20}(x)=-\sum _{i=1}^{4}c_iexp\left( -\sum _{j=1}^{6}a_{ij}(x_j-p_{ij})^2\right)\)
| 6 | [0,1] | \(-\)3.32 |
\(f_{21}(x)=-\sum _{i=1}^{5}\left[ (X-a_i)(X-a_i)^T+c_i\right] ^{-1}\)
| 4 | [0,10] | \(-\)10.1532 |
\(f_{22}(x)=-\sum _{i=1}^{7}\left[ (X-a_i)(X-a_i)^T+c_i\right] ^{-1}\)
| 4 | [0,10] | \(-\)10.4028 |
\(f_{23}(x)=-\sum _{i=1}^{10}\left[ (X-a_i)(X-a_i)^T+c_i\right] ^{-1}\)
| 4 | [0,10] | \(-\)10.5363 |
2.1 Particle swarm optimization
No | Function name | Dim | Range | \(f_{\min }\) |
---|---|---|---|---|
\(f_{24}\) | Storn’s Chebyshev Polynomial Fitting Problem | 9 | [\(-\)8192,8192] | 1 |
\(f_{25}\) | Inverse Hilbert Matrix Problem | 16 | [\(-\)16,384,16,384] | 1 |
\(f_{26}\) | Lennard–Jones Minimum Energy Cluster | 18 | [\(-\)4,4] | 1 |
\(f_{27}\) | Rastrigin’s Function | 10 | [\(-\)100,100] | 1 |
\(f_{28}\) | Griewangk’s Function | 10 | [\(-\)100,100] | 1 |
\(f_{29}\) | Weierstrass Function | 10 | [\(-\)100,100] | 1 |
\(f_{30}\) | Modified Schwefel’s Function | 10 | [\(-\)100,100] | 1 |
\(f_{31}\) | Expanded Schaffer’s F6 Function | 10 | [\(-\)100,100] | 1 |
\(f_{32}\) | Happy Cat Function | 10 | [\(-\)100,100] | 1 |
\(f_{33}\) | Ackley Function | 10 | [\(-\)100,100] | 1 |
No | Function name | Range | \(f_{\min }\) |
---|---|---|---|
\(f_{34}\) | Shifted and Rotated Bent Cigar Function | [\(-\)100,100] | 100 |
\(f_{35}\) | Shifted and Rotated Schwefel’s Function | [\(-\)100,100] | 1100 |
\(f_{36}\) | Shifted and Rotated Lunacek biRastrigin Function | [\(-\)100,100] | 700 |
\(f_{37}\) | Expanded Rosenbrock’s plus Griewangk’s Function | [\(-\)100,100] | 1900 |
\(f_{38}\) | Hybrid Function 1 (\(N=3\)) | [\(-\)100,100] | 1700 |
\(f_{39}\) | Hybrid Function 2 (\(N=4\)) | [\(-\)100,100] | 1600 |
\(f_{40}\) | Hybrid Function 3 (\(N=5\)) | [\(-\)100,100] | 2100 |
\(f_{41}\) | Composition Function 1 (\(N=3\)) | [\(-\)100,100] | 2200 |
\(f_{42}\) | Composition Function 2 (\(N=4\)) | [\(-\)100,100] | 2400 |
\(f_{43}\) | Composition Function 3 (\(N=5\)) | [\(-\)100,100] | 2500 |
Algorithm | Parameter | Value |
---|---|---|
VPPSO | \(\alpha\), \(N_1\), \(N_2\) | 0.3, 15, 15 |
PSO | \(C_1\), \(C_2\), w | 2, 2, 0.9–0.4 |
PPSO | ||
HGSO | Cluster size, \(M_1\), \(M_2\), | 5, 0.1 , 0.2 |
K, \(\alpha\), \(\beta\) | 1, 1, 1 | |
GWO | a | 2–0 |
SSA | Position update probability | 0.5 |
WOA | a | 2–0 |
AOA | \(C_1\), \(C_2\) | 2, 6 |
2.2 Literature review of related works on PSO improvement
Fun | VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|---|
\(f_1\) | Mean | 0 | 2.03E−03 | 2.35E−02 | 5.37E−185 | 8.15E−28 | 1.59E−07 | 6.38E−70 | 2.18E−84 |
Std | 0 | 4.62E−03 | 2.73E−02 | 0 | 1.23E−27 | 2.56E−07 | 3.48E−69 | 1.14E−83 | |
\(f_2\) | Mean | 0 | 1.27E−02 | 1.04E−01 | 1.00E−90 | 8.98E−17 | 2.00E+00 | 2.42E−51 | 5.13E−47 |
Std | 0 | 1.34E−02 | 7.25E−02 | 4.01E−90 | 7.05E−17 | 1.84E+00 | 8.44E−51 | 2.80E−46 | |
\(f_3\) | Mean | 0 | 4.35E+02 | 2.04E−01 | 1.11E−134 | 1.21E−05 | 1.49E+03 | 4.28E+04 | 2.80E−64 |
Std | 0 | 1.73E+02 | 2.69E−01 | 6.10E−134 | 2.50E−05 | 1.05E+03 | 1.60E+04 | 1.53E−63 | |
\(f_4\) | Mean | 0 | 3.36E+00 | 2.59E−02 | 2.69E−83 | 9.62E−07 | 1.22E+01 | 4.74E+01 | 5.57E−40 |
Std | 0 | 7.03E−01 | 4.04E−02 | 1.47E−82 | 1.36E−06 | 3.88E+00 | 3.15E+01 | 3.05E−39 | |
\(f_5\) | Mean | 1.29E−03 | 7.47E+01 | 2.89E+01 | 2.84E+01 | 2.71E+01 | 2.69E+02 | 2.80E+01 | 2.88E+01 |
Std | 1.52E−03 | 5.59E+01 | 5.03E−01 | 4.08E−01 | 7.98E−01 | 4.47E+02 | 4.30E−01 | 9.83E−02 | |
\(f_6\) | Mean | 1.20E−07 | 2.51E−03 | 3.63E−01 | 4.22E+00 | 7.47E−01 | 1.47E−07 | 3.65E−01 | 5.69E+00 |
Std | 3.63E−08 | 7.43E−03 | 2.39E−01 | 5.50E−01 | 3.54E−01 | 1.59E−07 | 2.16E−01 | 3.67E−01 | |
\(f_7\) | Mean | 6.10E−04 | 2.08E−02 | 2.73E−03 | 2.00E−04 | 1.76E−03 | 1.60E−01 | 4.32E−03 | 7.69E−04 |
Std | 5.95E−04 | 5.11E−03 | 2.22E−03 | 1.36E−04 | 6.97E−04 | 4.22E−02 | 4.76E−03 | 5.49E−04 | |
\(f_8\) | Mean | −1.22E+04 | −6.70E+03 | −9.62E+03 | −6.04E+03 | −6.02E+03 | −7.45E+03 | −1.00E+04 | −3.58E+03 |
Std | 5.00E+02 | 6.91E+02 | 1.43E+03 | 4.35E+03 | 7.92E+02 | 7.78E+02 | 1.72E+03 | 2.37E+02 | |
\(f_9\) | Mean | 0 | 5.26E+01 | 4.31E−01 | 0 | 3.76E+00 | 5.75E+01 | 0 | 0 |
Std | 0 | 1.69E+01 | 1.83E+00 | 0 | 5.22E+00 | 1.86E+01 | 0 | 0 | |
\(f_{10}\) | Mean | 7.99E−15 | 3.46E−01 | 6.06E−02 | 1.00E−15 | 9.96E−14 | 2.57E+00 | 4.32E−15 | 2.54E−15 |
Std | 0 | 5.70E−01 | 1.17E−01 | 6.48E−16 | 1.69E−14 | 6.13E−01 | 2.37E−15 | 1.80E−15 | |
\(f_{11}\) | Mean | 0 | 1.49E−02 | 8.76E−02 | 0 | 3.09E−03 | 1.66E−02 | 1.96E−02 | 1.90E−02 |
Std | 0 | 1.66E−02 | 9.34E−02 | 0 | 6.57E−03 | 1.37E−02 | 6.13E−02 | 1.04E−01 | |
\(f_{12}\) | Mean | 1.83E−07 | 3.45E−02 | 3.67E−02 | 4.42E−01 | 4.21E−02 | 8.00E+00 | 2.45E−02 | 8.19E−01 |
Std | 3.52E−07 | 4.96E−02 | 5.72E−02 | 1.18E−01 | 1.98E−02 | 3.25E+00 | 2.38E−02 | 1.77E−01 | |
\(f_{13}\) | Mean | 1.83E−03 | 8.95E−03 | 1.64E+00 | 2.79E+00 | 6.46E−01 | 1.56E+01 | 5.17E−01 | 2.91E+00 |
Std | 4.16E−03 | 1.29E−02 | 5.06E−01 | 1.31E−01 | 2.18E−01 | 1.31E+01 | 2.27E−01 | 5.19E−02 | |
Mean rank | 1.30 | 5.07 | 5.15 | 3.15 | 4.30 | 6.38 | 4.15 | 4.53 | |
Rank | 1 | 6 | 7 | 2 | 4 | 8 | 3 | 5 |
Fun | VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|---|
\(f_{14}\) | Mean | 1.13E+00 | 3.00E+00 | 9.98E−01 | 1.94E+00 | 4.87E+00 | 1.163E+00 | 3.61E+00 | 1.04E+00 |
Std | 3.29E−01 | 2.59E+00 | 2.16E−16 | 7.54E−01 | 4.44E+00 | 5.26E−01 | 3.78E+00 | 1.81E−01 | |
\(f_{15}\) | Mean | 1.15E−03 | 2.51E−03 | 4.47E−03 | 3.90E−04 | 5.14E−03 | 1.52E−03 | 6.54E−04 | 8.54E−04 |
Std | 3.63E−03 | 6.06E−03 | 8.08E−03 | 1.35E−04 | 8.54E−03 | 3.56E−03 | 3.71E−04 | 3.50E−04 | |
\(f_{16}\) | Mean | −1.03E+00 | −1.03E+00 | −1.03E+00 | −1.03E+00 | −1.03E+00 | −1.03E+00 | −1.03E+00 | −1.03E+00 |
Std | 9.18E−11 | 6.45E−16 | 5.37E−16 | 1.08E−04 | 1.80E−08 | 3.17E−14 | 1.96E−09 | 1.67E−04 | |
\(f_{17}\) | Mean | 3.97E−01 | 3.97E−01 | 3.97E−01 | 4.00E−01 | 3.97E−01 | 3.97E−01 | 3.97E−01 | 4.04E−01 |
Std | 3.63E−11 | 0 | 0 | 2.37E−03 | 7.21E−07 | 9.40E−15 | 5.90E−06 | 2.62E−02 | |
\(f_{18}\) | Mean | 3.00E+00 | 3.00E+00 | 3.00E+00 | 3.00E+00 | 3.00E+00 | 3.00E+00 | 3.00E+00 | 4.17E+00 |
Std | 5.5508E−09 | 1.4659E−15 | 2.0417E−15 | 4.2673E−04 | 4.5341E−05 | 1.6157E−13 | 5.6013E−04 | 3.1285E+00 | |
\(f_{19}\) | Mean | −3.86E+00 | −3.86E+00 | −3.86E+00 | −3.85E+00 | −3.86E+00 | −3.86E+00 | −3.85E+00 | −3.83E+00 |
Std | 2.40E−03 | 2.65E−15 | 2.44E−15 | 5.80E−03 | 3.03E−03 | 2.86E−10 | 3.11E−02 | 2.8777E−02 | |
\(f_{20}\) | Mean | −3.28E+00 | −3.27E+00 | −3.25E+00 | −3.05E+00 | −3.22E+00 | −3.22E+00 | −3.21E+00 | −2.90E+00 |
Std | 7.03E−02 | 5.82E−02 | 5.99E−02 | 1.26E−01 | 7.40E−02 | 5.92E−02 | 1.27E−01 | 1.73E−01 | |
\(f_{21}\) | Mean | −1.01E+01 | −6.07E+00 | −9.40E+00 | −4.68E+00 | −9.31E+00 | −8.31E+00 | −8.10E+00 | −6.37E+00 |
Std | 2.43E−08 | 3.67E+00 | 2.29E+00 | 1.54E−01 | 2.21E+00 | 3.14E+00 | 2.53E+00 | 1.92E+00 | |
\(f_{22}\) | Mean | −1.04E+01 | −7.95E+00 | −1.01E+01 | −4.72E+00 | −1.04E+01 | −8.58E+00 | −7.38E+00 | −6.29E+00 |
Std | 1.90E−08 | 3.53E+00 | 1.39E+00 | 1.22E−01 | 7.34E−04 | 3.10E+00 | 3.14E+00 | 1.94E+00 | |
\(f_{23}\) | Mean | −1.05E+01 | −6.82E+00 | −9.50E+00 | −4.77E+00 | −1.02E+01 | −9.00E+00 | −5.95E+00 | −6.50E+00 |
Std | 2.41E−08 | 3.80E+00 | 2.67E+00 | 1.90E−01 | 1.48E+00 | 2.89E+00 | 3.32E+00 | 2.41E+00 | |
Mean rank | 1.6 | 3.5 | 2.3 | 4.8 | 3.4 | 2.9 | 4.2 | 4.7 | |
Rank | 1 | 5 | 2 | 8 | 4 | 3 | 6 | 7 |
3 Velocity pausing particle swarm optimization
Fun | VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|---|
\(f_1\) | Mean | 0 | 1.98E+02 | 6.94E−01 | 3.58E−154 | 1.42E−12 | 1.45E+03 | 5.79E−71 | 2.91E−78 |
Std | 0 | 5.53E+01 | 7.51E−01 | 1.96E−153 | 1.15E−12 | 3.29E+02 | 3.08E−70 | 1.47E−77 | |
\(f_2\) | Mean | 0 | 1.84E+01 | 5.61E−01 | 8.24E−88 | 4.34E−08 | 4.88E+01 | 3.33E−50 | 4.93E−39 |
Std | 0 | 4.49E+01 | 4.63E−01 | 4.51E−87 | 1.68E−08 | 1.77E+01 | 1.52E−49 | 2.67E−38 | |
\(f_3\) | Mean | 0 | 4.15E+04 | 6.64E+00 | 3.43E−140 | 7.02E+02 | 4.95E+04 | 1.07E+06 | 5.98E−62 |
Std | 0 | 9.42E+03 | 1.33E+01 | 1.88E−139 | 5.98E+02 | 2.42E+04 | 2.90E+05 | 2.29E−61 | |
\(f_4\) | Mean | 0 | 2.58E+01 | 4.06E−02 | 2.45E−75 | 6.87E−01 | 2.80E+01 | 7.70E+01 | 6.28E−39 |
Std | 0 | 1.95E+00 | 6.58E−02 | 1.34E−74 | 6.12E−01 | 3.17E+00 | 2.37E+01 | 2.27E−38 | |
\(f_5\) | Mean | 6.26E−01 | 1.72E+04 | 1.02E+02 | 9.86E+01 | 9.78E+01 | 1.36E+05 | 9.80E+01 | 9.89E+01 |
Std | 7.47E−01 | 1.89E+04 | 4.63E+00 | 2.95E−01 | 7.10E−01 | 6.31E+04 | 2.80E−01 | 4.85E−02 | |
\(f_6\) | Mean | 6.03E−02 | 2.14E+02 | 1.16E+01 | 2.01E+01 | 1.02E+01 | 1.41E+03 | 4.52E+00 | 2.31E+01 |
Std | 4.33E−02 | 8.86E+01 | 2.56E+00 | 1.37E+00 | 9.52E−01 | 4.85E+02 | 1.15E+00 | 3.40E−01 | |
\(f_7\) | Mean | 3.30E−04 | 4.29E−01 | 6.07E−03 | 2.00E−04 | 7.75E−03 | 2.93E+00 | 4.29E−03 | 6.30E−04 |
Std | 4.38E−04 | 9.48E−02 | 5.29E−03 | 1.39E−04 | 4.06E−03 | 5.01E−01 | 4.27E−03 | 4.51E−04 | |
\(f_8\) | Mean | −4.02E+04 | −2.02E+04 | −2.62E+04 | −4.73E+03 | −1.63E+04 | −2.11E+04 | −3.55E+04 | −6.66E+03 |
Std | 2.16E+03 | 2.06E+03 | 2.85E+03 | 7.82E+02 | 2.48E+03 | 2.49E+03 | 5.89E+03 | 1.00E+03 | |
\(f_9\) | Mean | 0 | 2.36E+02 | 3.31E+00 | 0 | 7.16E+00 | 2.38E+02 | 0 | 0 |
Std | 0 | 2.43E+01 | 1.22E+01 | 0 | 5.36E+00 | 4.14E+01 | 0 | 0 | |
\(f_{10}\) | Mean | 7.99E−15 | 3.83E+00 | 7.90E−02 | 8.88E−16 | 1.33E−07 | 9.98E+00 | 4.55E−15 | 3.01E−15 |
Std | 0 | 2.66E−01 | 5.21E−02 | 0 | 5.90E−08 | 1.15E+00 | 2.18E−15 | 1.77E−15 | |
\(f_{11}\) | Mean | 0 | 2.79E+00 | 2.62E−01 | 0 | 5.22E−03 | 1.31E+01 | 0 | 0 |
Std | 0 | 6.45E−01 | 2.35E−01 | 0 | 1.21E−02 | 3.87E+00 | 0 | 0 | |
\(f_{12}\) | Mean | 2.61E−03 | 8.90E+00 | 1.97E−01 | 8.27E−01 | 2.93E−01 | 3.46E+01 | 4.14E−02 | 1.06E+00 |
Std | 3.72E−03 | 2.24E+00 | 5.10E−02 | 8.47E−02 | 5.10E−02 | 1.00E+01 | 1.55E−02 | 5.09E−02 | |
\(f_{13}\) | Mean | 6.25E−02 | 2.68E+02 | 1.01E+01 | 9.93E+00 | 6.73E+00 | 6.89E+03 | 2.46E+00 | 9.93E+00 |
Std | 1.27E−01 | 2.32E+02 | 7.77E−01 | 5.32E−02 | 3.94E−01 | 1.17E+04 | 7.65E−01 | 4.13E−02 | |
Mean rank | 1.30 | 6.23 | 4.46 | 3 | 4.15 | 7.07 | 3.30 | 3.69 | |
Rank | 1 | 7 | 6 | 2 | 5 | 8 | 3 | 4 |
Fun | VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|---|
\(f_1\)
| Mean | 0 | 5.31E+04 | 5.09E+00 | 7.32E−164 | 1.71E−03 | 9.50E+04 | 5.64E−68 | 6.39E−73 |
Std | 0 | 6.03E+03 | 6.55E+00 | 0 | 5.68E−04 | 6.52E+03 | 2.93E−67 | 1.87E−72 | |
\(f_2\)
| Mean | 0 | 1.14E+03 | 3.19E+00 | 4.60E−86 | 1.08E−02 | 5.35E+02 | 1.79E−47 | 7.84E−38 |
Std | 0 | 6.08E+01 | 2.64E+00 | 2.52E−85 | 1.56E−03 | 1.79E+01 | 5.55E−47 | 2.02E−37 | |
\(f_3\)
| Mean | 0 | 1.25E+06 | 1.03E+04 | 1.41E−138 | 3.22E+05 | 1.36E+06 | 2.81E+07 | 2.13E−48 |
Std | 0 | 2.51E+05 | 3.81E+04 | 7.76E−138 | 7.66E+04 | 6.16E+05 | 8.88E+06 | 1.17E−47 | |
\(f_4\)
| Mean | 0 | 5.70E+01 | 6.02E−02 | 6.48E−85 | 6.65E+01 | 4.08E+01 | 7.64E+01 | 7.12E−37 |
Std | 0 | 2.81E+00 | 1.24E−01 | 3.28E−84 | 4.56E+00 | 2.90E+00 | 2.76E+01 | 1.82E−36 | |
\(f_5\)
| Mean | 1.13E+01 | 2.96E+07 | 5.49E+02 | 4.98E+02 | 4.98E+02 | 3.78E+07 | 4.96E+02 | 4.98E+02 |
Std | 2.26E+01 | 4.20E+06 | 5.11E+01 | 9.77E−02 | 3.21E−01 | 5.08E+06 | 5.09E−01 | 1.90E−02 | |
\(f_6\)
| Mean | 2.97E+00 | 5.09E+04 | 1.19E+02 | 1.18E+02 | 9.10E+01 | 9.67E+04 | 3.30E+01 | 1.22E+02 |
Std | 4.83E+00 | 4.37E+03 | 1.09E+01 | 1.73E+00 | 1.99E+00 | 7.05E+03 | 9.29E+00 | 5.73E−01 | |
\(f_7\)
| Mean | 3.60E−04 | 2.20E+02 | 1.25E−02 | 2.17E−04 | 4.72E−02 | 2.87E+02 | 2.05E−03 | 6.45E−04 |
Std | 4.71E−04 | 3.81E+01 | 1.40E−02 | 2.13E−04 | 9.85E−03 | 4.04E+01 | 1.98E−03 | 4.53E−04 | |
\(f_8\)
| Mean | −1.95E+05 | −7.08E+04 | −6.68E+04 | −9.74E+03 | −5.74E+04 | −5.86E+04 | −1.72E+05 | −1.48E+04 |
Std | 1.26E+04 | 4.69E+03 | 7.31E+03 | 2.47E+03 | 3.81E+03 | 4.63E+03 | 2.90E+04 | 2.05E+03 | |
\(f_9\)
| Mean | 0 | 3.13E+03 | 9.52E+00 | 0 | 8.22E+01 | 3.13E+03 | 3.03E−14 | 0 |
Std | 0 | 1.19E+02 | 1.14E+01 | 0 | 3.08E+01 | 1.06E+02 | 1.66E−13 | 0 | |
\(f_{10}\)
| Mean | 7.99E−15 | 1.24E+01 | 2.15E−01 | 8.88E−16 | 1.88E−03 | 1.42E+01 | 3.84E−15 | 3.96E−15 |
Std | 0 | 6.07E−01 | 1.42E−01 | 0 | 2.64E−04 | 2.83E−01 | 1.63E−15 | 1.22E−15 | |
\(f_{11}\)
| Mean | 0 | 4.66E+02 | 6.76E−01 | 0 | 1.64E−02 | 8.28E+02 | 0 | 0 |
Std | 0 | 4.93E+01 | 4.10E−01 | 0 | 3.36E−02 | 5.74E+01 | 0 | 0 | |
\(f_{12}\)
| Mean | 2.18E−02 | 8.69E+06 | 7.26E−01 | 1.06E+00 | 7.57E−01 | 1.52E+06 | 1.06E−01 | 1.16E+00 |
Std | 3.36E−02 | 2.72E+06 | 6.05E−02 | 3.32E−02 | 7.36E−02 | 1.01E+06 | 5.33E−02 | 1.20E−02 | |
\(f_{13}\)
| Mean | 6.91E−01 | 5.31E+07 | 5.38E+01 | 4.99E+01 | 5.01E+01 | 3.41E+07 | 1.87E+01 | 4.99E+01 |
Std | 7.65E−01 | 1.20E+07 | 5.46E+00 | 1.66E−02 | 1.67E+00 | 7.64E+06 | 4.98E+00 | 5.21E−02 | |
Mean rank | 1.30 | 6.38 | 4.69 | 2.84 | 4.61 | 6.84 | 3.23 | 3.69 | |
Rank | 1 | 7 | 6 | 2 | 5 | 8 | 3 | 4 |
3.1 Complexity analysis
Fun | VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|---|
\(f_{24}\)
| Mean | 1.00E+00 | 3.18E+05 | 5.84E+04 | 1.00E+00 | 2.53E+04 | 2.30E+06 | 2.15E+07 | 2.97E+00 |
Std | 0 | 4.47E+05 | 2.94E+05 | 1.03E−09 | 6.32E+04 | 2.69E+06 | 2.20E+07 | 1.08E+01 | |
\(f_{25}\)
| Mean | 4.59E+00 | 3.01E+02 | 4.61E+01 | 4.62E+00 | 4.61E+02 | 1.51E+03 | 6.34E+03 | 5.15E+00 |
Std | 3.84E−01 | 9.82E+01 | 7.90E+01 | 3.41E−01 | 2.84E+02 | 8.91E+02 | 2.62E+03 | 1.04E+00 | |
\(f_{26}\)
| Mean | 2.45E+00 | 3.23E+00 | 2.76E+00 | 7.26E+00 | 2.47E+00 | 4.73E+00 | 5.87E+00 | 5.63E+00 |
Std | 1.28E+00 | 1.86E+00 | 1.48E+00 | 8.66E−01 | 1.46E+00 | 2.13E+00 | 2.46E+00 | 8.11E−01 | |
\(f_{27}\)
| Mean | 2.42E+01 | 3.16E+01 | 4.78E+01 | 6.09E+01 | 1.88E+01 | 3.47E+01 | 5.41E+01 | 5.93E+01 |
Std | 1.18E+01 | 1.28E+01 | 1.99E+01 | 8.56E+00 | 1.08E+01 | 1.94E+01 | 2.12E+01 | 1.00E+01 | |
\(f_{28}\)
| Mean | 1.20E+00 | 1.21E+00 | 1.63E+00 | 1.27E+01 | 2.09E+00 | 1.22E+00 | 2.70E+00 | 4.39E+01 |
Std | 1.20E−01 | 1.35E−01 | 4.11E−01 | 3.95E+00 | 9.52E−01 | 1.45E−01 | 7.91E−01 | 1.40E+01 | |
\(f_{29}\)
| Mean | 4.16E+00 | 4.53E+00 | 7.19E+00 | 7.42E+00 | 2.87E+00 | 5.02E+00 | 8.63E+00 | 8.23E+00 |
Std | 1.62E+00 | 1.18E+00 | 1.77E+00 | 8.01E−01 | 9.54E−01 | 2.15E+00 | 1.66E+00 | 1.34E+00 | |
\(f_{30}\)
| Mean | 9.13E+02 | 1.07E+03 | 1.17E+03 | 1.72E+03 | 9.64E+02 | 1.04E+03 | 1.44E+03 | 1.58E+03 |
Std | 4.00E+02 | 3.21E+02 | 2.79E+02 | 2.04E+02 | 3.21E+02 | 3.80E+02 | 3.30E+02 | 2.30E+02 | |
\(f_{31}\)
| Mean | 4.05E+00 | 4.29E+00 | 4.50E+00 | 4.73E+00 | 4.07E+00 | 4.34E+00 | 4.75E+00 | 4.55E+00 |
Std | 4.78E−01 | 3.01E−01 | 4.43E−01 | 2.13E−01 | 5.23E−01 | 4.30E−01 | 2.57E−01 | 2.30E−01 | |
\(f_{32}\)
| Mean | 1.19E+00 | 1.21E+00 | 1.38E+00 | 1.56E+00 | 1.21E+00 | 1.40E+00 | 1.47E+00 | 2.55E+00 |
Std | 9.53E−02 | 1.19E−01 | 2.17E−01 | 1.44E−01 | 7.32E−02 | 2.01E−01 | 1.84E−01 | 6.93E−01 | |
\(f_{33}\)
| Mean | 1.98E+01 | 2.13E+01 | 2.10E+01 | 2.12E+01 | 2.14E+01 | 2.10E+01 | 2.13E+01 | 2.12E+01 |
Std | 4.84E+00 | 1.04E−01 | 8.31E−02 | 7.64E−01 | 8.02E−02 | 9.84E−02 | 1.34E−01 | 3.88E−01 | |
Mean rank | 1.2 | 4 | 4.2 | 5.9 | 3.3 | 4.5 | 6.9 | 6 | |
Rank | 1 | 3 | 4 | 6 | 2 | 5 | 8 | 7 |
Fun | VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|---|
\(f_{34}\)
| Mean | 2.60E+02 | 4.67E+02 | 4.67E+02 | 1.69E+03 | 2.07E+03 | 6.35E+02 | 1.30E+03 | 3.40E+02 |
Std | 2.53E+02 | 1.39E+03 | 1.39E+03 | 1.56E+03 | 2.08E+03 | 9.25E+02 | 1.23E+03 | 4.40E+02 | |
\(f_{35}\)
| Mean | 1.10E+03 | 1.11E+03 | 1.10E+03 | 1.10E+03 | 1.11E+03 | 1.10E+03 | 1.11E+03 | 1.10E+03 |
Std | 2.15E−01 | 3.57E+01 | 2.41E+01 | 4.25E−01 | 3.59E+01 | 6.81E+00 | 2.48E+01 | 3.56E+00 | |
\(f_{36}\)
| Mean | 7.01E+02 | 7.01E+02 | 7.01E+02 | 7.02E+02 | 7.02E+02 | 7.01E+02 | 7.02E+02 | 7.01E+02 |
Std | 1.01E+00 | 7.02E−01 | 1.02E+00 | 7.29E−02 | 4.32E−01 | 1.03E+00 | 4.76E−01 | 4.58E−01 | |
\(f_{37}\)
| Mean | 1.90E+03 | 1.90E+03 | 1.90E+03 | 1.90E+03 | 1.90E+03 | 1.90E+03 | 1.90E+03 | 1.90E+03 |
Std | 0 | 3.60E−03 | 5.00E−03 | 0 | 6.52E−03 | 5.00E−03 | 0 | 0 | |
\(f_{38}\)
| Mean | 2.84E+03 | 1.82E+03 | 1.76E+03 | 2.90E+03 | 2.96E+03 | 3.46E+03 | 3.40E+03 | 3.09E+03 |
Std | 1.14E+03 | 1.21E+02 | 7.39E+01 | 1.07E+03 | 2.40E+03 | 3.10E+03 | 2.27E+03 | 1.52E+03 | |
\(f_{39}\)
| Mean | 1.60E+03 | 1.62E+03 | 1.60E+03 | 1.60E+03 | 1.60E+03 | 1.60E+03 | 1.61E+03 | 1.60E+03 |
Std | 6.83E−01 | 4.50E+01 | 8.1324 | 5.95E−01 | 8.15E−01 | 7.67E+00 | 3.68E+01 | 1.20E+00 | |
\(f_{40}\)
| Mean | 2.79E+03 | 2.20E+03 | 2.15E+03 | 3.42E+03 | 3.83E+03 | 3.59E+03 | 5.57E+03 | 3.55E+03 |
Std | 7.05E+02 | 1.17E+02 | 1.43E+02 | 7.90E+02 | 1.31E+03 | 2.15E+03 | 5.19E+03 | 3.75E+03 | |
\(f_{41}\)
| Mean | 2.23E+03 | 2.26E+03 | 2.25E+03 | 2.28E+03 | 2.27E+03 | 2.20E+03 | 2.27E+03 | 2.30E+03 |
Std | 3.90E+01 | 4.51E+01 | 4.39E+01 | 3.79E+01 | 4.45E+01 | 6.21E+00 | 4.45E+01 | 3.04E+01 | |
\(f_{42}\)
| Mean | 2.55E+03 | 2.58E+03 | 2.61E+03 | 2.51E+03 | 2.59E+03 | 2.56E+03 | 2.62E+03 | 2.55E+03 |
Std | 9.16E+01 | 1.21E+02 | 1.14E+02 | 4.18E+00 | 1.02E+02 | 1.07E+02 | 1.07E+02 | 4.77E+01 | |
\(f_{43}\)
| Mean | 2.83E+03 | 2.84E+03 | 2.84E+03 | 2.85E+03 | 2.84E+03 | 2.84E+03 | 2.84E+03 | 2.86E+03 |
Std | 6.39E+01 | 1.06E−02 | 3.03E−02 | 2.61E+00 | 3.28E−02 | 1.44E+01 | 1.42E+01 | 1.38E+01 | |
Mean rank | 1.6 | 4 | 3.3 | 4.5 | 5.1 | 3.8 | 6 | 4.4 | |
Rank | 1 | 4 | 2 | 6 | 7 | 3 | 8 | 5 |
Fun | \(\alpha =1\) | \(\alpha =0.9\) | \(\alpha =0.8\) | \(\alpha =0.7\) | \(\alpha =0.6\) | \(\alpha =0.5\) | \(\alpha =0.4\) | \(\alpha =0.3\) | \(\alpha =0.2\) | \(\alpha =0.1\) | |
---|---|---|---|---|---|---|---|---|---|---|---|
\(f_1\) | Mean | 1.0740E−13 | 4.0145E−14 | 1.5206E−13 | 3.4060E−13 | 0 | 0 | 0 | 0 | 0 | 0 |
Std | 2.0235E−13 | 1.3709E−13 | 4.2009E−13 | 1.5731E−12 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_2\) | Mean | 4.2250E−09 | 6.1076E−09 | 3.0117E−09 | 2.1381E−09 | 0 | 0 | 0 | 0 | 0 | 0 |
Std | 4.9789E−09 | 7.7185E−09 | 3.7862E−09 | 3.6237E−09 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_3\) | Mean | 2.8633E+00 | 8.1757E+00 | 7.8212E+00 | 5.3997E+00 | 2.6922E+00 | 1.7731E−08 | 0 | 0 | 0 | 0 |
Std | 5.2307E+00 | 1.9636E+01 | 3.1985E+01 | 2.0412E+01 | 1.4200E+01 | 9.7118E−08 | 0 | 0 | 0 | 0 | |
\(f_4\) | Mean | 5.4272E+00 | 4.5572E+00 | 5.8247E+00 | 3.4271E+00 | 1.1082E−03 | 0 | 0 | 0 | 0 | 0 |
Std | 3.9745E+00 | 4.0583E+00 | 4.9080E+00 | 4.1303E+00 | 6.0698E−03 | 0 | 0 | 0 | 0 | 0 | |
\(f_5\) | Mean | 6.0447E−03 | 8.1068E−03 | 8.8890E−03 | 7.5756E−01 | 5.8569E−02 | 1.7444E−02 | 7.8419E−03 | 7.1545E−03 | 5.8675E−03 | 4.3621E−02 |
Std | 5.5676E−03 | 7.4615E−03 | 8.5286E−03 | 4.0798E+00 | 2.1692E−01 | 3.1156E−02 | 8.3687E−03 | 1.0755E−02 | 9.8910E−03 | 4.8610E−02 | |
\(f_6\) | Mean | 2.8275E−07 | 2.8580E−07 | 3.2120E−07 | 3.3974E−07 | 2.7429E−07 | 3.0593E−07 | 3.1530E−07 | 2.6991E−07 | 2.7181E−07 | 2.9952E−07 |
Std | 1.3371E−07 | 1.6852E−07 | 1.5898E−07 | 2.1855E−07 | 1.0753E−07 | 1.4040E−07 | 3.4039E−07 | 9.2880E−08 | 1.1894E−07 | 1.1076E−07 | |
\(f_7\) | Mean | 3.8890E−03 | 4.5037E−03 | 2.1717E−03 | 3.0567E−03 | 2.6610E−03 | 1.8660E−03 | 8.4429E−04 | 6.2221E−04 | 3.8730E−04 | 3.7386E−04 |
Std | 4.1993E−03 | 4.8191E−03 | 1.3465E−03 | 2.5313E−03 | 3.6356E−03 | 1.9260E−03 | 7.6180E−04 | 7.1045E−04 | 5.5741E−04 | 6.0076E−04 | |
\(f_8\) | Mean | −6.2012E+03 | −6.2384E+03 | −7.5729E+03 | −8.7569E+03 | −1.0521E+04 | -1.1114E+04 | -1.1989E+04 | -1.2274E+04 | -1.2466E+04 | -1.2447E+04 |
Std | 7.6169E+02 | 1.0194E+03 | 1.7018E+03 | 2.1649E+03 | 1.8961E+03 | 1.4240E+03 | 6.7207E+02 | 4.6183E+02 | 2.1362E+02 | 1.7434E+02 | |
\(f_9\) | Mean | 8.8568E+00 | 2.2221E+00 | 9.9499E−02 | 1.5256E+00 | 0 | 0 | 0 | 0 | 0 | 0 |
Std | 2.5930E+01 | 7.9540E+00 | 4.0056E−01 | 5.8585E+00 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_{10}\) | Mean | 5.2590E−08 | 4.2238E−08 | 1.9264E−08 | 5.6178E−09 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 | 7.8752E−15 | 7.8752E−15 | 7.9936E−15 |
Std | 7.2909E−08 | 3.1099E−08 | 2.2403E−08 | 1.5988E−08 | 0 | 0 | 0 | 6.4863E−16 | 6.4863E−16 | 0 | |
\(f_{11}\) | Mean | 2.2118E−02 | 5.5788E−03 | 7.1351E−03 | 1.0381E−02 | 1.3922E−03 | 0 | 0 | 0 | 0 | 0 |
Std | 2.9546E−02 | 2.1881E−02 | 1.7045E−02 | 2.4659E−02 | 7.6252E−03 | 0 | 0 | 0 | 0 | 0 | |
\(f_{12}\) | Mean | 2.4209E+00 | 2.7007E+00 | 1.2809E+00 | 4.5324E−01 | 1.0703E−02 | 3.4933E−03 | 6.5395E−06 | 6.9466E−03 | 4.8446E−06 | 4.0187E−05 |
Std | 4.0173E+00 | 5.3992E+00 | 2.6552E+00 | 1.5168E+00 | 5.8300E−02 | 1.9080E−02 | 1.3542E−05 | 2.6417E−02 | 3.5470E−06 | 1.2586E−04 | |
\(f_{13}\) | Mean | 2.5256E−02 | 4.4718E−03 | 2.2734E−02 | 1.4218E−02 | 2.9949E−02 | 1.3036E−02 | 1.1963E−03 | 1.3615E−03 | 1.8788E−03 | 3.3066E−03 |
Std | 4.1779E−02 | 5.5847E−03 | 3.9269E−02 | 2.2138E−02 | 5.6045E−02 | 2.7188E−02 | 3.1580E−03 | 3.5435E−03 | 4.1811E−03 | 7.1089E−03 | |
\(f_{14}\) | Mean | 7.1813E+00 | 2.8454E+00 | 1.8571E+00 | 1.4615E+00 | 1.1970E+00 | 1.0315E+00 | 1.2981E+00 | 1.0982E+00 | 1.6299E+00 | 2.2853E+00 |
Std | 4.8467E+00 | 1.5920E+00 | 1.1534E+00 | 6.7646E−01 | 4.0432E−01 | 1.8142E−01 | 4.6214E−01 | 3.0306E−01 | 7.1473E−01 | 1.4669E+00 | |
\(f_{15}\) | Mean | 5.1770E−03 | 1.9961E−03 | 3.2482E−03 | 1.9941E−03 | 1.8435E−03 | 1.1929E−03 | 2.5541E−03 | 1.7698E−03 | 2.5135E−03 | 5.1743E−03 |
Std | 8.5227E−03 | 5.0027E−03 | 6.8369E−03 | 5.0047E−03 | 5.0376E−03 | 3.6333E−03 | 5.9814E−03 | 5.0640E−03 | 6.0731E−03 | 8.5381E−03 | |
\(f_{16}\) | Mean | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 |
Std | 1.6651E−10 | 2.3807E−10 | 1.7095E−10 | 1.0108E−10 | 2.0195E−10 | 1.8283E−10 | 1.5641E−10 | 2.1082E−10 | 1.8790E−10 | 1.7536E−10 | |
\(f_{17}\) | Mean | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 |
Std | 5.7342E−11 | 5.9843E−11 | 6.0181E−11 | 6.1676E−11 | 6.6495E−11 | 5.6099E−11 | 7.1232E−11 | 5.6696E−11 | 6.4089E−11 | 7.9035E−11 | |
\(f_{18}\) | Mean | 3.0000E+00 | 5.7000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 |
Std | 6.9077E−09 | 1.4789E+01 | 8.2635E−09 | 1.1135E−08 | 7.1408E−09 | 1.1996E−08 | 8.4349E−09 | 1.0176E−08 | 1.1671E−08 | 8.8019E−09 | |
\(f_{19}\) | Mean | −3.8617E+00 | −3.8615E+00 | −3.8625E+00 | −3.8615E+00 | −3.8623E+00 | −3.8625E+00 | −3.8620E+00 | −3.8620E+00 | −3.8604E+00 | −3.8612E+00 |
Std | 2.7250E−03 | 2.9875E−03 | 1.4390E−03 | 2.9875E−03 | 1.9996E−03 | 1.4389E−03 | 2.4048E−03 | 2.4049E−03 | 3.6735E−03 | 3.2044E−03 | |
\(f_{20}\) | Mean | −3.2471E+00 | −3.2437E+00 | −3.2628E+00 | −3.2613E+00 | −3.2707E+00 | −3.2380E+00 | −3.2463E+00 | −3.2758E+00 | −3.2671E+00 | −3.2311E+00 |
Std | 9.3462E−02 | 7.7281E−02 | 7.6444E−02 | 7.1946E−02 | 7.0124E−02 | 7.3184E−02 | 8.0421E−02 | 6.7850E−02 | 8.8189E−02 | 9.8458E−02 | |
\(f_{21}\) | Mean | −5.7782E+00 | −6.4518E+00 | −8.7273E+00 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 |
Std | 2.0850E+00 | 2.5406E+00 | 2.6966E+00 | 2.7764E−08 | 2.2884E−08 | 3.8921E−08 | 2.6335E−08 | 2.4826E−08 | 4.1770E−08 | 2.6843E−08 | |
\(f_{22}\) | Mean | −6.4565E+00 | −7.0809E+00 | −9.0935E+00 | -1.0148E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 |
Std | 2.4582E+00 | 2.8201E+00 | 2.4480E+00 | 1.3943E+00 | 2.4125E−08 | 2.8206E−08 | 2.9215E−08 | 2.4859E−08 | 2.7235E−08 | 2.8861E−08 | |
\(f_{23}\) | Mean | −7.4221E+00 | −8.1597E+00 | −9.9214E+00 | −9.7381E+00 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 |
Std | 3.2821E+00 | 3.2742E+00 | 1.9107E+00 | 2.4364E+00 | 2.6337E−08 | 3.4521E−08 | 2.6350E−08 | 2.0585E−08 | 2.9648E−08 | 2.3076E−08 | |
Mean rank | 6.39 | 6.78 | 5.78 | 5.26 3.95 | 3.91 | 3.39 | 2.39 | 3.65 | 4.08 | ||
Rank | 9 | 10 | 8 | 7 | 5 | 4 | 2 | 1 | 3 | 6 |
4 Results and discussion
Fun | \(\alpha =1\) | \(\alpha =0.9\) | \(\alpha =0.8\) | \(\alpha =0.7\) | \(\alpha =0.6\) | \(\alpha =0.5\) | \(\alpha =0.4\) | \(\alpha =0.3\) | \(\alpha =0.2\) | \(\alpha =0.1\) | |
---|---|---|---|---|---|---|---|---|---|---|---|
\(f_1\) | Mean | 1.9374E−15 | 2.2719E−15 | 1.7405E−15 | 2.4947E−15 | 9.5265E−15 | 0 | 0 | 0 | 0 | 0 |
Std | 3.5265E−15 | 3.9372E−15 | 4.2407E−15 | 6.7856E−15 | 5.0728E−14 | 0 | 0 | 0 | 0 | 0 | |
\(f_2\) | Mean | 1.0732E−09 | 1.2999E−09 | 9.2905E−10 | 1.7926E−10 | 1.5220E−11 | 0 | 0 | 0 | 0 | 0 |
Std | 8.0486E−10 | 1.0807E−09 | 7.7864E−10 | 3.3271E−10 | 8.3364E−11 | 0 | 0 | 0 | 0 | 0 | |
\(f_3\) | Mean | 5.2597E−02 | 1.1285E+00 | 3.7903E−02 | 3.3745E+00 | 3.9994E−04 | 0 | 0 | 0 | 0 | 0 |
Std | 1.5606E−01 | 6.0683E+00 | 1.7911E−01 | 1.5411E+01 | 2.1266E−03 | 0 | 0 | 0 | 0 | 0 | |
\(f_4\) | Mean | 5.1899E+00 | 2.5321E+00 | 2.9192E+00 | 2.0616E+00 | 2.8039E−05 | 0 | 0 | 0 | 0 | 0 |
Std | 4.9353E+00 | 3.9449E+00 | 4.5093E+00 | 3.7944E+00 | 1.5311E−04 | 0 | 0 | 0 | 0 | 0 | |
\(f_5\) | Mean | 9.2687E−01 | 1.7951E+00 | 1.9827E−03 | 1.2686E+00 | 9.1318E−01 | 5.1129E−03 | 3.7902E−03 | 1.2988E−03 | 2.0486E−03 | 1.1921E−02 |
Std | 5.0061E+00 | 6.8197E+00 | 2.0695E−03 | 5.1147E+00 | 4.9749E+00 | 8.2990E−03 | 6.4773E−03 | 1.5295E−03 | 2.5883E−03 | 2.4939E−02 | |
\(f_6\) | Mean | 1.1723E−07 | 1.3477E−07 | 1.2284E−07 | 1.2388E−07 | 1.2343E−07 | 1.2960E−07 | 1.2401E−07 | 1.2068E−07 | 1.3140E−07 | 1.3739E−07 |
Std | 2.8505E−08 | 4.0992E−08 | 2.9665E−08 | 3.2934E−08 | 3.2684E−08 | 3.9205E−08 | 3.2376E−08 | 3.6333E−08 | 3.6238E−08 | 2.9056E−08 | |
\(f_7\) | Mean | 2.7852E−03 | 1.9928E−03 | 2.5907E−03 | 1.5174E−03 | 1.8988E−03 | 1.6807E−03 | 6.5992E−04 | 6.1031E−04 | 8.5365E−04 | 7.8121E−04 |
Std | 2.8553E−03 | 2.2521E−03 | 2.4650E−03 | 1.4783E−03 | 1.8640E−03 | 2.0296E−03 | 6.5307E−04 | 5.9569E−04 | 9.1302E−04 | 1.0540E−03 | |
\(f_8\) | Mean | −5.9200E+03 | −6.4848E+03 | −8.0746E+03 | −8.9093E+03 | -1.0410E+04 | -1.1145E+04 | -1.1803E+04 | -1.2251E+04 | -1.2302E+04 | -1.2239E+04 |
Std | 9.9769E+02 | 7.2290E+02 | 2.2254E+03 | 2.5226E+03 | 1.5581E+03 | 1.5315E+03 | 9.8645E+02 | 5.0009E+02 | 4.8339E+02 | 5.0516E+02 | |
\(f_9\) | Mean | 2.9185E+00 | 1.9899E+00 | 6.6332E−02 | 3.3165E−02 | 0 | 0 | 0 | 0 | 0 | 0 |
Std | 1.5427E+01 | 8.7327E+00 | 3.6331E−01 | 1.8165E−01 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_{10}\) | Mean | 8.3437E−09 | 9.0255E−09 | 6.4641E−09 | 3.9685E−09 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 |
Std | 6.7952E−09 | 9.0201E−09 | 7.5267E−09 | 1.0572E−08 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_{11}\) | Mean | 6.0531E−03 | 8.3580E−03 | 5.1429E−03 | 7.2723E−03 | 5.1437E−03 | 0 | 0 | 0 | 0 | 0 |
Std | 1.5223E−02 | 1.8699E−02 | 1.4754E−02 | 2.2518E−02 | 1.7042E−02 | 0 | 0 | 0 | 0 | 0 | |
\(f_{12}\) | Mean | 1.6093E+00 | 4.3698E−01 | 3.9376E−01 | 3.2573E−01 | 1.4536E−01 | 1.4070E−02 | 1.0562E−02 | 1.8362E−07 | 1.7063E−07 | 1.5301E−07 |
Std | 3.2380E+00 | 1.6488E+00 | 1.4982E+00 | 9.7608E−01 | 7.2814E−01 | 3.6212E−02 | 3.2230E−02 | 3.5270E−07 | 4.9592E−07 | 2.0952E−07 | |
\(f_{13}\) | Mean | 7.2899E−03 | 5.4330E−03 | 7.5984E−03 | 6.7859E−03 | 1.0202E−02 | 2.7890E−02 | 5.0768E−03 | 1.8326E−03 | 1.1004E−03 | 3.7845E−03 |
Std | 1.1930E−02 | 6.7672E−03 | 9.8457E−03 | 1.2016E−02 | 1.8422E−02 | 6.2506E−02 | 8.4177E−03 | 4.1649E−03 | 3.3529E−03 | 5.2238E−03 | |
\(f_{14}\) | Mean | 5.9863E+00 | 2.2207E+00 | 2.3476E+00 | 1.7919E+00 | 1.3117E+00 | 1.0973E+00 | 1.1843E+00 | 1.1366E+00 | 1.8583E+00 | 2.5892E+00 |
Std | 4.5195E+00 | 1.1813E+00 | 2.0013E+00 | 9.1702E−01 | 6.4395E−01 | 3.9953E−01 | 4.3045E−01 | 3.2975E−01 | 1.0295E+00 | 1.6811E+00 | |
\(f_{15}\) | Mean | 3.2236E−03 | 3.2961E−03 | 7.0227E−03 | 3.8371E−03 | 1.2021E−03 | 3.2132E−03 | 3.6950E−03 | 1.1585E−03 | 1.0530E−03 | 3.2242E−03 |
Std | 6.8486E−03 | 6.8292E−03 | 1.2633E−02 | 7.5225E−03 | 3.6339E−03 | 6.8488E−03 | 6.9429E−03 | 3.6371E−03 | 1.6866E−03 | 6.8611E−03 | |
\(f_{16}\) | Mean | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 |
Std | 9.7709E−11 | 8.8795E−11 | 7.9677E−11 | 1.0590E−10 | 9.6686E−11 | 1.3403E−10 | 1.0114E−10 | 9.1808E−11 | 1.0290E−10 | 9.2493E−11 | |
\(f_{17}\) | Mean | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 |
Std | 3.4048E−11 | 6.7741E−11 | 2.2481E−11 | 4.8564E−11 | 5.2777E−11 | 5.7202E−11 | 2.9531E−11 | 3.6394E−11 | 3.8075E−11 | 3.6193E−11 | |
\(f_{18}\) | Mean | 3.0000E+00 | 5.7000E+00 | 3.0000E+00 | 3.0000E+00 | 5.7000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 |
Std | 4.6211E−09 | 1.4789E+01 | 5.7280E−09 | 7.6949E−09 | 1.4789E+01 | 5.0998E−09 | 4.2154E−09 | 5.5508E−09 | 5.8122E−09 | 6.7770E−09 | |
\(f_{19}\) | Mean | −3.8620E+00 | −3.8623E+00 | −3.8620E+00 | −3.8620E+00 | −3.8625E+00 | −3.8620E+00 | −3.8623E+00 | −3.8620E+00 | −3.8607E+00 | −3.8609E+00 |
Std | 2.4049E−03 | 1.9996E−03 | 2.4049E−03 | 2.4049E−03 | 1.4390E−03 | 2.4049E−03 | 1.9996E−03 | 2.4049E−03 | 3.5449E−03 | 3.3905E−03 | |
\(f_{20}\) | Mean | −3.2669E+00 | −3.2548E+00 | −3.2737E+00 | −3.2668E+00 | −3.2684E+00 | −3.2684E+00 | −3.2781E+00 | −3.2823E+00 | −3.2481E+00 | −3.2583E+00 |
Std | 8.3295E−02 | 7.0039E−02 | 6.7843E−02 | 7.0335E−02 | 7.3399E−02 | 7.8640E−02 | 6.4059E−02 | 7.0374E−02 | 1.0486E−01 | 9.2986E−02 | |
\(f_{21}\) | Mean | −6.8747E+00 | −6.9571E+00 | −8.2149E+00 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 |
Std | 2.8176E+00 | 2.7238E+00 | 2.8515E+00 | 2.0222E−08 | 2.5285E−08 | 2.0311E−08 | 2.3774E−08 | 2.4398E−08 | 1.7969E−08 | 1.9766E−08 | |
\(f_{22}\) | Mean | −7.3867E+00 | −8.1048E+00 | −8.7860E+00 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 |
Std | 2.9435E+00 | 2.9444E+00 | 2.7664E+00 | 1.7795E−08 | 2.4488E−08 | 2.8742E−08 | 2.5889E−08 | 1.9087E−08 | 2.3641E−08 | 2.0682E−08 | |
\(f_{23}\) | Mean | −7.6809E+00 | −7.0875E+00 | −8.9392E+00 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 |
Std | 3.2152E+00 | 3.1945E+00 | 2.8781E+00 | 2.0320E−08 | 2.1296E−08 | 2.6814E−08 | 2.9676E−08 | 2.4145E−08 | 2.3093E−08 | 1.9142E−08 | |
Mean rank | 6.21 | 7.13 | 5.21 | 5.34 | 4.13 | 4.43 | 2.95 | 2.26 | 3.60 | 4.13 | |
Rank | 8 | 9 | 6 | 7 | 4 | 5 | 2 | 1 | 3 | 4 |
Fun |
\(\alpha =1\)
|
\(\alpha =0.9\)
|
\(\alpha =0.8\)
|
\(\alpha =0.7\)
|
\(\alpha =0.6\)
|
\(\alpha =0.5\)
|
\(\alpha =0.4\)
|
\(\alpha =0.3\)
|
\(\alpha =0.2\)
|
\(\alpha =0.1\)
| |
---|---|---|---|---|---|---|---|---|---|---|---|
\(f_1\)
| Mean | 2.5121E−16 | 8.2320E−16 | 3.6067E−16 | 1.4124E−15 | 8.1269E−18 | 1.4954E−17 | 0 | 0 | 0 | 0 |
Std | 4.1866E−16 | 2.1538E−15 | 7.0600E−16 | 7.2895E−15 | 2.0641E−17 | 8.0068E−17 | 0 | 0 | 0 | 0 | |
\(f_2\)
| Mean | 6.3697E−10 | 3.9895E−10 | 3.7706E−10 | 1.2174E−10 | 0 | 0 | 0 | 0 | 0 | 0 |
Std | 9.4659E−10 | 3.8340E−10 | 5.2586E−10 | 2.2511E−10 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_3\)
| Mean | 4.1409E−04 | 6.6368E−06 | 5.3330E−04 | 2.6498E−04 | 7.3863E−04 | 1.8334E−06 | 0 | 0 | 0 | 0 |
Std | 1.9116E−03 | 1.5364E−05 | 2.9180E−03 | 1.3279E−03 | 4.0456E−03 | 1.0042E−05 | 0 | 0 | 0 | 0 | |
\(f_4\)
| Mean | 3.1725E+00 | 1.2571E+00 | 7.6465E−01 | 3.1121E−01 | 8.7220E−02 | 0 | 0 | 0 | 0 | 0 |
Std | 5.9970E+00 | 2.8446E+00 | 1.9112E+00 | 9.9525E−01 | 3.9918E−01 | 0 | 0 | 0 | 0 | 0 | |
\(f_5\)
| Mean | 1.8251E−03 | 4.4972E+00 | 1.8723E−03 | 3.6000E+00 | 2.5705E−03 | 1.2947E−01 | 1.6114E−03 | 1.8823E−03 | 1.7614E−03 | 8.6854E−01 |
Std | 3.6768E−03 | 1.0226E+01 | 3.9590E−03 | 9.3330E+00 | 3.3448E−03 | 6.9804E−01 | 3.2011E−03 | 2.4514E−03 | 1.9719E−03 | 4.7400E+00 | |
\(f_6\)
| Mean | 9.1490E−08 | 9.3538E−08 | 9.3956E−08 | 8.8880E−08 | 8.1242E−08 | 8.7159E−08 | 9.2792E−08 | 8.7128E−08 | 9.9317E−08 | 9.4414E−08 |
Std | 2.2931E−08 | 2.1221E−08 | 2.4633E−08 | 2.5100E−08 | 1.8871E−08 | 2.1113E−08 | 1.9279E−08 | 1.9848E−08 | 2.9986E−08 | 2.0284E−08 | |
\(f_7\)
| Mean | 1.5187E−03 | 1.3831E−03 | 1.4169E−03 | 2.0232E−03 | 1.1657E−03 | 1.2284E−03 | 1.1771E−03 | 7.6457E−04 | 4.2182E−04 | 8.4742E−04 |
Std | 1.5037E−03 | 1.1988E−03 | 1.6555E−03 | 2.0250E−03 | 9.0124E−04 | 9.9643E−04 | 1.1526E−03 | 6.6793E−04 | 3.6156E−04 | 1.0318E−03 | |
\(f_8\)
| Mean | −5.8041E+03 | −6.2690E+03 | −7.1279E+03 | −8.7990E+03 | −9.9851E+03 | -1.0775E+04 | -1.1643E+04 | -1.2036E+04 | -1.2433E+04 | -1.1927E+04 |
Std | 8.5762E+02 | 8.7558E+02 | 2.0044E+03 | 2.4814E+03 | 1.9672E+03 | 1.5253E+03 | 9.8901E+02 | 9.4042E+02 | 2.2938E+02 | 8.5242E+02 | |
\(f_9\)
| Mean | 9.1707E−12 | 1.0232E−13 | 3.0070E−12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Std | 3.8099E−11 | 2.8221E−13 | 1.6438E−11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
\(f_{10}\)
| Mean | 4.3331E−09 | 4.1528E−09 | 1.9643E−09 | 8.9440E−10 | 8.5578E−10 | 7.8752E−15 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 | 7.9936E−15 |
Std | 5.7234E−09 | 4.1141E−09 | 2.0667E−09 | 1.5607E−09 | 2.4481E−09 | 6.4863E−16 | 0 | 0 | 0 | 0 | |
\(f_{11}\)
| Mean | 3.2882E−04 | 6.9425E−03 | 6.4530E−03 | 1.6407E−03 | 6.5732E−04 | 3.3307E−16 | 0 | 0 | 0 | 0 |
Std | 1.8010E−03 | 2.7126E−02 | 1.9971E−02 | 5.6446E−03 | 3.6003E−03 | 1.8243E−15 | 0 | 0 | 0 | 0 | |
\(f_{12}\)
| Mean | 4.8557E−01 | 2.1525E−02 | 3.2943E−01 | 1.4504E−02 | 1.0587E−02 | 1.5338E−08 | 5.0655E−08 | 9.3040E−09 | 1.6797E−08 | 1.1324E−08 |
Std | 1.5954E+00 | 5.3316E−02 | 1.0514E+00 | 4.8088E−02 | 3.1587E−02 | 2.0732E−08 | 1.7885E−07 | 5.8304E−09 | 1.7678E−08 | 1.0854E−08 | |
\(f_{13}\)
| Mean | 3.6434E−03 | 6.5610E−03 | 3.9656E−03 | 1.1213E−02 | 1.5636E−02 | 1.7505E−02 | 1.4213E−02 | 3.6311E−03 | 7.9193E−03 | 3.6310E−03 |
Std | 5.9248E−03 | 1.1715E−02 | 6.5849E−03 | 2.5858E−02 | 2.8634E−02 | 4.7252E−02 | 2.0503E−02 | 5.9086E−03 | 1.7396E−02 | 5.9084E−03 | |
\(f_{14}\)
| Mean | 7.0522E+00 | 2.7382E+00 | 2.4468E+00 | 2.0228E+00 | 1.7277E+00 | 1.1969E+00 | 1.3518E+00 | 1.4662E+00 | 2.0225E+00 | 2.4761E+00 |
Std | 4.8122E+00 | 2.5912E+00 | 1.9889E+00 | 1.0879E+00 | 8.9859E−01 | 4.0438E−01 | 6.3221E−01 | 4.9826E−01 | 1.1465E+00 | 1.5057E+00 | |
\(f_{15}\)
| Mean | 9.6520E−03 | 6.3590E−03 | 3.7094E−03 | 4.4880E−03 | 3.1544E−03 | 2.7235E−03 | 2.0332E−03 | 4.6376E−03 | 2.4180E−03 | 6.4126E−03 |
Std | 1.3090E−02 | 9.3251E−03 | 1.1177E−02 | 8.0799E−03 | 6.8689E−03 | 6.1515E−03 | 5.0793E−03 | 8.0076E−03 | 6.0875E−03 | 1.3015E−02 | |
\(f_{16}\)
| Mean | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0316E+00 | -1.0306E+00 | -1.0316E+00 |
Std | 1.0299E−10 | 8.8139E−11 | 8.7979E−11 | 4.9732E−11 | 7.7253E−11 | 1.0038E−10 | 8.3121E−11 | 5.4914E−11 | 5.7745E−03 | 5.7405E−11 | |
\(f_{17}\)
| Mean | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 | 3.9789E−01 |
Std | 2.7556E−11 | 3.0695E−11 | 2.3529E−11 | 4.1375E−11 | 4.2908E−11 | 3.2757E−11 | 2.7944E−11 | 3.7616E−11 | 4.6174E−11 | 3.1971E−11 | |
\(f_{18}\)
| Mean | 5.7000E+00 | 1.3800E+01 | 1.3800E+01 | 5.7000E+00 | 8.4000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 | 3.0000E+00 |
Std | 1.4789E+01 | 2.8005E+01 | 2.8005E+01 | 1.4789E+01 | 2.0550E+01 | 3.6817E−09 | 4.6391E−09 | 2.5707E−09 | 4.7419E−09 | 4.4370E−09 | |
\(f_{19}\)
| Mean | −3.8620E+00 | −3.8623E+00 | −3.8620E+00 | −3.8617E+00 | −3.8623E+00 | −3.8620E+00 | −3.8612E+00 | −3.8612E+00 | −3.8612E+00 | −3.8617E+00 |
Std | 2.4049E−03 | 1.9996E−03 | 2.4049E−03 | 2.7250E−03 | 1.9996E−03 | 2.4049E−03 | 3.2065E−03 | 3.2065E−03 | 3.2065E−03 | 2.7250E−03 | |
\(f_{20}\)
| Mean | −3.2478E+00 | −3.2674E+00 | −3.2770E+00 | −3.2852E+00 | −3.2613E+00 | −3.2931E+00 | −3.2646E+00 | −3.2665E+00 | −3.2577E+00 | −3.2355E+00 |
Std | 8.0733E−02 | 7.6878E−02 | 7.3926E−02 | 6.9561E−02 | 8.3248E−02 | 6.7791E−02 | 8.6651E−02 | 8.2808E−02 | 8.9386E−02 | 1.0067E−01 | |
\(f_{21}\)
| Mean | −7.1255E+00 | −6.5342E+00 | −8.0499E+00 | −9.9848E+00 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 | -1.0153E+01 |
Std | 2.7610E+00 | 2.4510E+00 | 2.6566E+00 | 9.2244E−01 | 1.5778E−08 | 1.6532E−08 | 2.1568E−08 | 2.3057E−08 | 1.8395E−08 | 1.9354E−08 | |
\(f_{22}\)
| Mean | −8.6951E+00 | −7.9600E+00 | −9.4171E+00 | -1.0227E+01 | -1.0148E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 | -1.0403E+01 |
Std | 2.6919E+00 | 2.8982E+00 | 2.3250E+00 | 9.6292E−01 | 1.3943E+00 | 1.9479E−08 | 1.6380E−08 | 2.2369E−08 | 2.2340E−08 | 1.9027E−08 | |
\(f_{23}\)
| Mean | −7.9192E+00 | −8.4792E+00 | −8.9237E+00 | -1.0008E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 | -1.0536E+01 |
Std | 3.1256E+00 | 2.7927E+00 | 2.7911E+00 | 2.0098E+00 | 2.3032E−08 | 1.9394E−08 | 1.7406E−08 | 1.7871E−08 | 2.0041E−08 | 1.8913E−08 | |
Mean rank | 6.65 | 6.43 | 5.82 | 5.56 | 4.56 | 3.65 | 3.26 | 2.65 | 4.04 | 3.78 | |
Rank | 10 | 9 | 8 | 7 | 6 | 3 | 2 | 1 | 5 | 4 |
4.1 Exploitation analysis
4.2 Exploration analysis
VPPSO | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA | |
---|---|---|---|---|---|---|---|---|
Mean Rank | 1.3768 | 5 | 4.1159 | 3.8986 | 4.1739 | 5.4493 | 4.4928 | 4.4348 |
Rank | 1 | 7 | 3 | 2 | 4 | 8 | 6 | 5 |
4.3 Impact of high dimensionality
Fun | PSO | PPSO | HGSO | GWO | SSA | WOA | AOA |
---|---|---|---|---|---|---|---|
\(f_1\) | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 |
\(f_2\) | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 |
\(f_3\) | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 |
\(f_4\) | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 | 1.2118E−12 |
\(f_5\) | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 |
\(f_6\) | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 4.6756E−02 | 3.0199E−11 | 3.0199E−11 |
\(f_7\) | 3.0199E−11 | 5.8587E−06 | 2.2658E−03 | 6.0104E−08 | 3.0199E−11 | 1.7290E−06 | 1.1199E−01 |
\(f_8\) | 3.0199E−11 | 4.1997E−10 | 8.4848E−09 | 3.0199E−11 | 3.0199E−11 | 6.0459E−07 | 3.0199E−11 |
\(f_9\) | 1.2118E−12 | 1.2118E−12 | NaN | 1.1970E−12 | 1.2118E−12 | NaN | NaN |
\(f_{10}\) | 1.2118E−12 | 1.2118E−12 | 2.7085E−14 | 1.1795E−12 | 1.2118E−12 | 1.0793E−09 | 4.6350E−13 |
\(f_{11}\) | 1.2118E−12 | 1.2118E−12 | NaN | 1.1035E−02 | 1.2118E−12 | 8.1523E−02 | 3.3371E−01 |
\(f_{12}\) | 4.9752E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 |
\(f_{13}\) | 3.3520E−08 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 4.9752E−11 | 3.0199E−11 | 3.0199E−11 |
\(f_{14}\) | 6.7133E−02 | 5.3793E−11 | 1.8950E−08 | 8.6382E−09 | 1.0962E−06 | 9.3771E−08 | 1.3371E−04 |
\(f_{15}\) | 4.6427E−01 | 8.1874E−01 | 4.6427E−01 | 3.5137E−02 | 1.2493E−05 | 1.6955E−02 | 1.1058E−04 |
\(f_{16}\) | 5.1436E−12 | 1.1364E−11 | 3.0199E−11 | 4.5043E−11 | 3.0199E−11 | 2.3985E−01 | 3.0199E−11 |
\(f_{17}\) | 1.2118E−12 | 1.2118E−12 | 3.0199E−11 | 3.0199E−11 | 2.9450E−11 | 3.3384E−11 | 4.1997E−10 |
\(f_{18}\) | 2.5839E−11 | 2.8827E−11 | 3.0199E−11 | 3.0199E−11 | 3.0199E−11 | 4.5043E−11 | 3.0199E−11 |
\(f_{19}\) | 4.0806E−12 | 1.3369E−11 | 1.1023E−08 | 8.3520E−08 | 5.4941E−11 | 1.8500E−08 | 9.7555E−10 |
\(f_{20}\) | 1.7634E−03 | 2.6433E−01 | 3.8249E−09 | 2.5974E−05 | 1.0547E−01 | 1.0188E−05 | 3.8202E−10 |
\(f_{21}\) | 3.7599E−01 | 9.5912E−08 | 3.0199E−11 | 3.0199E−11 | 1.9527E−03 | 3.0199E−11 | 3.0199E−11 |
\(f_{22}\) | 2.5831E−02 | 4.7193E−10 | 3.0199E−11 | 3.0199E−11 | 1.9527E−03 | 3.0199E−11 | 3.0199E−11 |
\(f_{23}\) | 3.0199E−11 | 9.2008E−06 | 3.0199E−11 | 3.0199E−11 | 3.9881E−04 | 3.0199E−11 | 3.0199E−11 |
+ | 19 | 18 | 18 | 20 | 19 | 18 | 19 |
\(\approx\) | 3 | 3 | 2 | 3 | 3 | 3 | 1 |
- | 1 | 2 | 3 | 0 | 1 | 2 | 3 |
4.4 Performance of VPPSO on the CEC2019 and CEC2020 test functions
Algorithm | \(x_1\) | \(x_2\) | \(x_3\) | \(x_4\) | Optimal cost |
---|---|---|---|---|---|
VPPSO | 0.1961 | 3.3885 | 9.2006 | 0.1988 | 1.6740 |
CPSO [91] | 0.202369 | 3.544214 | 9.04821 | 0.205723 | 1.72802 |
PSO [84] | 0.2157 | 3.4704 | 9.0356 | 0.2658 | 1.85778 |
IPSO [92] | 0.2444 | 6.2175 | 8.2915 | 0.2444 | 2.3810 |
MPA [93] | 0.205728 | 3.470509 | 9.036624 | 0.205730 | 1.724853 |
GA [95] | 0.2489 | 6.1730 | 8.1789 | 0.2533 | 2.4300 |
HGSO | 0.2005 | 4.0017 | 8.6053 | 0.2410 | 1.9736 |
GWO [79] | 0.205676 | 3.478377 | 9.03681 | 0.205778 | 1.72624 |
SSA | 0.1880 | 3.5364 | 9.2523 | 0.1986 | 1.6880 |
WOA | 0.1797 | 4.0355 | 9.8861 | 0.1958 | 1.8236 |
AOA[86] | 0.2057 | 3.4705 | 9.0366 | 0.2057 | 1.7249 |
GSA [84] | 0.2191 | 3.6661 | 10.000 | 0.2508 | 2.2291 |
HHO [86] | 0.2134 | 3.5601 | 8.4629 | 0.2346 | 1.8561 |
EO [2] | 0.2057 | 3.4705 | 9.03664 | 0.2057 | 1.7249 |
Algorithm |
\(x_1\)
|
\(x_2\)
|
\(x_3\)
|
\(x_4\)
|
\(x_5\)
|
\(x_6\)
|
\(x_7\)
| Optimal weight |
---|---|---|---|---|---|---|---|---|
VPPSO | 3.5000 | 0.7000 | 17.0007 | 7.3075 | 7.7340 | 3.3506 | 5.2867 | 2995 |
PSO [84] | 3.500 | 0.70 | 17 | 7.74 | 7.85 | 3.36 | 5.389 | 2998.12 |
HHO [86] | 3.4981 | 0.7 | 17 | 7.6398 | 7.8 | 3.3582 | 5.2853 | 2999.6 |
HGSO | 3.6000 | 0.7148 | 17.0000 | 8.3000 | 8.3000 | 3.9000 | 5.5000 | 3433.0 |
GWO | 3.5043 | 0.7000 | 17.0000 | 7.4386 | 7.7555 | 3.3606 | 5.2900 | 3002.9 |
SSA | 3.5080 | 0.7000 | 17.0000 | 7.3386 | 7.8456 | 3.3568 | 5.2867 | 3002.4 |
WOA | 3.5080 | 0.7000 | 17.0000 | 7.7490 | 7.8598 | 3.4031 | 5.2867 | 3018.5 |
GA [86] | 3.5592 | 0.7133 | 19.659 | 7.9365 | 8.0197 | 3.6719 | 5.3276 | 3727.4 |
PSO [84] | 3.500 | 0.70 | 17 | 7.74 | 7.85 | 3.36 | 5.389 | 2998.12 |
SCA [87] | 3.508755 | 0.7 | 17 | 7.3 | 7.8 | 3.461020 | 5.289213 | 3030.563 |
GSA [88] | 3.6 | 0.7 | 17 | 8.3 | 7.8 | 3.369658 | 5.289224 | 3051.12 |
AOA | 3.5109 | 0.7 | 17 | 7.3 | 7.7198 | 3.3505 | 5.2867 | 2998.8 |
4.5 Sensitivity analysis
Algorithm | \(x_1\) | \(x_2\) | \(x_3\) | \(x_4\) | Optimal cost |
---|---|---|---|---|---|
VPPSO | 0.7783 | 0.3847 | 40.3274 | 199.9140 | 5886.1 |
CPSO [91] | 0.8125 | 0.4375 | 42.091266 | 176.7465 | 6061.0777 |
PSO-DE [96] | 0.8125 | 0.4375 | 42.098446 | 176.6366 | 6059.71433 |
HPSO [97] | 0.8125 | 0.4375 | 42.0984 | 176.6366 | 6059.7143 |
GA [98] | 0.81250 | 0.43750 | 42.097398 | 176.65405 | 6059.94634 |
HHO [86] | 0.9833 | 0.4758 | 49.9297 | 98.9036 | 6391.9 |
GWO [79] | 0.812500 | 0.434500 | 42.089181 | 176.758731 | 6051.5639 |
HGSO | 1.1992 | 0.6511 | 61.8141 | 29.1838 | 7666.4 |
SSA | 0.8031 | 0.3970 | 41.6104 | 184.2422 | 5962.7 |
WOA | 1.0003 | 0.5510 | 51.3396 | 88.0599 | 6695.4 |
AOA | 0.7831 | 0.3871 | 40.5777 | 196.4388 | 5893.9 |
SCA [86] | 0.8951 | 0.4579 | 44.8371 | 147.3388 | 6403.7 |
ACO [99] | 0.812500 | 0.437500 | 42.098353 | 176.637751 | 6059.7258 |
4.6 Convergence analysis
4.7 Statistical significance analysis
Algorithm | \(x_1\) | \(x_2\) | \(x_3\) | Optimal weight |
---|---|---|---|---|
VPPSO | 0.0525 | 0.3756 | 10.2659 | 0.0127 |
PSO | 0.0524 | 0.3746 | 10.3140 | 0.0127 |
GA [86] | 0.0598 | 0.4121 | 9.1320 | 0.019824 |
HGSO | 0.0500 | 0.3171 | 14.3710 | 0.0130 |
GWO | 0.0513 | 0.3474 | 11.8763 | 0.0127 |
SSA | 0.0527 | 0.3805 | 10.0417 | 0.0127 |
WOA | 0.0538 | 0.4091 | 8.7700 | 0.0127 |
AOA | 0.0529 | 0.3863 | 9.7450 | 0.0127 |
GSA [88] | 0.05028 | 0.32368 | 13.52541 | 0.01270 |
SCA [86] | 0.0500 | 0.3171 | 14.1417 | 0.012797 |
HHO [86] | 0.0562 | 0.4754 | 6.6670 | 0.013016 |
5 Engineering problems
5.1 Welded beam design (WBD)
5.2 Speed reducer design (SRD)
5.3 Pressure vessel design (PVD)
5.4 Tension/compression spring design (TSD)
6 Conclusion
7 Future work
-
The velocity pausing concept can be integrated with other metaheuristic algorithms to enhance their performance.
-
Further work is need to develop a binary VPPSO version to solve binary optimization problems such as feature selection and the 0–1 knapsack problem.
-
Another interesting future work is the development of a multi-objective VPPSO algorithm.
-
VPPSO can be hybridized with other recent algorithms such as EO, HGSO and AOA to further improve its performance.
-
One potential direction is to combine VPPSO with well-known approaches such as Levy flight and chaotic maps to develop an enhanced version of VPPSO.
-
VPPSO can be applied to optimize real-world engineering problems such as three-bar truss design and multiple disc clutch brake.