# encoding=utf8
import logging
import operator as oper
from numpy import random as rand, vectorize, argwhere, copy, apply_along_axis, argmin, argsort, fmin, fmax, full, asarray, abs, inf
from NiaPy.algorithms.algorithm import Algorithm
logging.basicConfig()
logger = logging.getLogger('NiaPy.algorithms.other')
logger.setLevel('INFO')
__all__ = ['MultipleTrajectorySearch', 'MultipleTrajectorySearchV1', 'MTS_LS1', 'MTS_LS1v1', 'MTS_LS2', 'MTS_LS3', 'MTS_LS3v1']
[docs]def MTS_LS1(Xk, Xk_fit, Xb, Xb_fit, improve, SR, task, BONUS1=10, BONUS2=1, sr_fix=0.4, rnd=rand, **ukwargs):
r"""Multiple trajectory local search one.
Args:
Xk (numpy.ndarray): Current solution.
Xk_fit (float): Current solutions fitness/function value.
Xb (numpy.ndarray): Global best solution.
Xb_fit (float): Global best solutions fitness/function value.
improve (bool): Has the solution been improved.
SR (numpy.ndarray): Search range.
task (Task): Optimization task.
BONUS1 (int): Bonus reward for improving global best solution.
BONUS2 (int): Bonus reward for improving solution.
sr_fix (numpy.ndarray): Fix when search range is to small.
rnd (mtrand.RandomState): Random number generator.
**ukwargs (Dict[str, Any]): Additional arguments.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray]:
1. New solution.
2. New solutions fitness/function value.
3. Global best if found else old global best.
4. Global bests function/fitness value.
5. If solution has improved.
6. Search range.
"""
if not improve:
SR /= 2
ifix = argwhere(SR < 1e-15)
SR[ifix] = task.bRange[ifix] * sr_fix
improve, grade = False, 0.0
for i in range(len(Xk)):
Xk_i_old = Xk[i]
Xk[i] = Xk_i_old - SR[i]
Xk = task.repair(Xk, rnd)
Xk_fit_new = task.eval(Xk)
if Xk_fit_new < Xb_fit: grade, Xb, Xb_fit = grade + BONUS1, Xk.copy(), Xk_fit_new
if Xk_fit_new == Xk_fit: Xk[i] = Xk_i_old
elif Xk_fit_new > Xk_fit:
Xk[i] = Xk_i_old + 0.5 * SR[i]
Xk = task.repair(Xk, rnd)
Xk_fit_new = task.eval(Xk)
if Xk_fit_new < Xb_fit: grade, Xb, Xb_fit = grade + BONUS1, Xk.copy(), Xk_fit_new
if Xk_fit_new >= Xk_fit: Xk[i] = Xk_i_old
else: grade, improve, Xk_fit = grade + BONUS2, True, Xk_fit_new
else: grade, improve, Xk_fit = grade + BONUS2, True, Xk_fit_new
return Xk, Xk_fit, Xb, Xb_fit, improve, grade, SR
[docs]def MTS_LS1v1(Xk, Xk_fit, Xb, Xb_fit, improve, SR, task, BONUS1=10, BONUS2=1, sr_fix=0.4, rnd=rand, **ukwargs):
r"""Multiple trajectory local search one version two.
Args:
Xk (numpy.ndarray): Current solution.
Xk_fit (float): Current solutions fitness/function value.
Xb (numpy.ndarray): Global best solution.
Xb_fit (float): Global best solutions fitness/function value.
improve (bool): Has the solution been improved.
SR (numpy.ndarray): Search range.
task (Task): Optimization task.
BONUS1 (int): Bonus reward for improving global best solution.
BONUS2 (int): Bonus reward for improving solution.
sr_fix (numpy.ndarray): Fix when search range is to small.
rnd (mtrand.RandomState): Random number generator.
**ukwargs (Dict[str, Any]): Additional arguments.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray]:
1. New solution.
2. New solutions fitness/function value.
3. Global best if found else old global best.
4. Global bests function/fitness value.
5. If solution has improved.
6. Search range.
"""
if not improve:
SR /= 2
ifix = argwhere(SR < 1e-15)
SR[ifix] = task.bRange[ifix] * sr_fix
improve, D, grade = False, rnd.uniform(-1, 1, task.D), 0.0
for i in range(len(Xk)):
Xk_i_old = Xk[i]
Xk[i] = Xk_i_old - SR[i] * D[i]
Xk = task.repair(Xk, rnd)
Xk_fit_new = task.eval(Xk)
if Xk_fit_new < Xb_fit: grade, Xb, Xb_fit = grade + BONUS1, Xk.copy(), Xk_fit_new
elif Xk_fit_new == Xk_fit: Xk[i] = Xk_i_old
elif Xk_fit_new > Xk_fit:
Xk[i] = Xk_i_old + 0.5 * SR[i]
Xk = task.repair(Xk, rnd)
Xk_fit_new = task.eval(Xk)
if Xk_fit_new < Xb_fit: grade, Xb, Xb_fit = grade + BONUS1, Xk.copy(), Xk_fit_new
elif Xk_fit_new >= Xk_fit: Xk[i] = Xk_i_old
else: grade, improve, Xk_fit = grade + BONUS2, True, Xk_fit_new
else: grade, improve, Xk_fit = grade + BONUS2, True, Xk_fit_new
return Xk, Xk_fit, Xb, Xb_fit, improve, grade, SR
def genNewX(x, r, d, SR, op):
r"""Move solution to other position based on operator.
Args:
x (numpy.ndarray): Solution to move.
r (int): Random number.
d (float): Scale factor.
SR (numpy.ndarray): Search range.
op (operator): Operator to use.
Returns:
numpy.ndarray: Moved solution based on operator.
"""
return op(x, SR * d) if r == 0 else x
[docs]def MTS_LS2(Xk, Xk_fit, Xb, Xb_fit, improve, SR, task, BONUS1=10, BONUS2=1, sr_fix=0.4, rnd=rand, **ukwargs):
r"""Multiple trajectory local search two.
Args:
Xk (numpy.ndarray): Current solution.
Xk_fit (float): Current solutions fitness/function value.
Xb (numpy.ndarray): Global best solution.
Xb_fit (float): Global best solutions fitness/function value.
improve (bool): Has the solution been improved.
SR (numpy.ndarray): Search range.
task (Task): Optimization task.
BONUS1 (int): Bonus reward for improving global best solution.
BONUS2 (int): Bonus reward for improving solution.
sr_fix (numpy.ndarray): Fix when search range is to small.
rnd (mtrand.RandomState): Random number generator.
**ukwargs (Dict[str, Any]): Additional arguments.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray]:
1. New solution.
2. New solutions fitness/function value.
3. Global best if found else old global best.
4. Global bests function/fitness value.
5. If solution has improved.
6. Search range.
See Also:
* :func:`NiaPy.algorithms.other.genNewX`
"""
if not improve:
SR /= 2
ifix = argwhere(SR < 1e-15)
SR[ifix] = task.bRange[ifix] * sr_fix
improve, grade = False, 0.0
for _ in range(len(Xk)):
D = -1 + rnd.rand(len(Xk)) * 2
R = rnd.choice([0, 1, 2, 3], len(Xk))
Xk_new = task.repair(vectorize(genNewX)(Xk, R, D, SR, oper.sub), rnd)
Xk_fit_new = task.eval(Xk_new)
if Xk_fit_new < Xb_fit: grade, Xb, Xb_fit = grade + BONUS1, Xk_new.copy(), Xk_fit_new
elif Xk_fit_new != Xk_fit:
if Xk_fit_new > Xk_fit:
Xk_new = task.repair(vectorize(genNewX)(Xk, R, D, SR, oper.add), rnd)
Xk_fit_new = task.eval(Xk_new)
if Xk_fit_new < Xb_fit: grade, Xb, Xb_fit = grade + BONUS1, Xk_new.copy(), Xk_fit_new
elif Xk_fit_new < Xk_fit: grade, Xk, Xk_fit, improve = grade + BONUS2, Xk_new.copy(), Xk_fit_new, True
else: grade, Xk, Xk_fit, improve = grade + BONUS2, Xk_new.copy(), Xk_fit_new, True
return Xk, Xk_fit, Xb, Xb_fit, improve, grade, SR
[docs]def MTS_LS3(Xk, Xk_fit, Xb, Xb_fit, improve, SR, task, BONUS1=10, BONUS2=1, rnd=rand, **ukwargs):
r"""Multiple trajectory local search three.
Args:
Xk (numpy.ndarray): Current solution.
Xk_fit (float): Current solutions fitness/function value.
Xb (numpy.ndarray): Global best solution.
Xb_fit (float): Global best solutions fitness/function value.
improve (bool): Has the solution been improved.
SR (numpy.ndarray): Search range.
task (Task): Optimization task.
BONUS1 (int): Bonus reward for improving global best solution.
BONUS2 (int): Bonus reward for improving solution.
rnd (mtrand.RandomState): Random number generator.
**ukwargs (Dict[str, Any]): Additional arguments.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray]:
1. New solution.
2. New solutions fitness/function value.
3. Global best if found else old global best.
4. Global bests function/fitness value.
5. If solution has improved.
6. Search range.
"""
Xk_new, grade = copy(Xk), 0.0
for i in range(len(Xk)):
Xk1, Xk2, Xk3 = copy(Xk_new), copy(Xk_new), copy(Xk_new)
Xk1[i], Xk2[i], Xk3[i] = Xk1[i] + 0.1, Xk2[i] - 0.1, Xk3[i] + 0.2
Xk1, Xk2, Xk3 = task.repair(Xk1, rnd), task.repair(Xk2, rnd), task.repair(Xk3, rnd)
Xk1_fit, Xk2_fit, Xk3_fit = task.eval(Xk1), task.eval(Xk2), task.eval(Xk3)
if Xk1_fit < Xb_fit: grade, Xb, Xb_fit, improve = grade + BONUS1, Xk1.copy(), Xk1_fit, True
if Xk2_fit < Xb_fit: grade, Xb, Xb_fit, improve = grade + BONUS1, Xk2.copy(), Xk2_fit, True
if Xk3_fit < Xb_fit: grade, Xb, Xb_fit, improve = grade + BONUS1, Xk3.copy(), Xk3_fit, True
D1, D2, D3 = Xk_fit - Xk1_fit if abs(Xk1_fit) != inf else 0, Xk_fit - Xk2_fit if abs(Xk2_fit) != inf else 0, Xk_fit - Xk3_fit if abs(Xk3_fit) != inf else 0
if D1 > 0: grade, improve = grade + BONUS2, True
if D2 > 0: grade, improve = grade + BONUS2, True
if D3 > 0: grade, improve = grade + BONUS2, True
a, b, c = 0.4 + rnd.rand() * 0.1, 0.1 + rnd.rand() * 0.2, rnd.rand()
Xk_new[i] += a * (D1 - D2) + b * (D3 - 2 * D1) + c
Xk_new = task.repair(Xk_new, rnd)
Xk_fit_new = task.eval(Xk_new)
if Xk_fit_new < Xk_fit:
if Xk_fit_new < Xb_fit: Xb, Xb_fit, grade = Xk_new.copy(), Xk_fit_new, grade + BONUS1
else: grade += BONUS2
Xk, Xk_fit, improve = Xk_new, Xk_fit_new, True
return Xk, Xk_fit, Xb, Xb_fit, improve, grade, SR
[docs]def MTS_LS3v1(Xk, Xk_fit, Xb, Xb_fit, improve, SR, task, phi=3, BONUS1=10, BONUS2=1, rnd=rand, **ukwargs):
r"""Multiple trajectory local search three version one.
Args:
Xk (numpy.ndarray): Current solution.
Xk_fit (float): Current solutions fitness/function value.
Xb (numpy.ndarray): Global best solution.
Xb_fit (float): Global best solutions fitness/function value.
improve (bool): Has the solution been improved.
SR (numpy.ndarray): Search range.
task (Task): Optimization task.
phi (int): Number of new generated positions.
BONUS1 (int): Bonus reward for improving global best solution.
BONUS2 (int): Bonus reward for improving solution.
rnd (mtrand.RandomState): Random number generator.
**ukwargs (Dict[str, Any]): Additional arguments.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray]:
1. New solution.
2. New solutions fitness/function value.
3. Global best if found else old global best.
4. Global bests function/fitness value.
5. If solution has improved.
6. Search range.
"""
grade, Disp = 0.0, task.bRange / 10
while True in (Disp > 1e-3):
Xn = apply_along_axis(task.repair, 1, asarray([rnd.permutation(Xk) + Disp * rnd.uniform(-1, 1, len(Xk)) for _ in range(phi)]), rnd)
Xn_f = apply_along_axis(task.eval, 1, Xn)
iBetter, iBetterBest = argwhere(Xn_f < Xk_fit), argwhere(Xn_f < Xb_fit)
grade += len(iBetterBest) * BONUS1 + (len(iBetter) - len(iBetterBest)) * BONUS2
if len(Xn_f[iBetterBest]) > 0:
ib, improve = argmin(Xn_f[iBetterBest]), True
Xb, Xb_fit, Xk, Xk_fit = Xn[iBetterBest][ib][0].copy(), Xn_f[iBetterBest][ib][0], Xn[iBetterBest][ib][0].copy(), Xn_f[iBetterBest][ib][0]
elif len(Xn_f[iBetter]) > 0:
ib, improve = argmin(Xn_f[iBetter]), True
Xk, Xk_fit = Xn[iBetter][ib][0].copy(), Xn_f[iBetter][ib][0]
Su, Sl = fmin(task.Upper, Xk + 2 * Disp), fmax(task.Lower, Xk - 2 * Disp)
Disp = (Su - Sl) / 10
return Xk, Xk_fit, Xb, Xb_fit, improve, grade, SR
[docs]class MultipleTrajectorySearch(Algorithm):
r"""Implementation of Multiple trajectory search.
Algorithm:
Multiple trajectory search
Date:
2018
Authors:
Klemen Berkovic
License:
MIT
Reference URL:
https://ieeexplore.ieee.org/document/4631210/
Reference paper:
Lin-Yu Tseng and Chun Chen, "Multiple trajectory search for Large Scale Global Optimization," 2008 IEEE Congress on Evolutionary Computation (IEEE World Congress on Computational Intelligence), Hong Kong, 2008, pp. 3052-3059. doi: 10.1109/CEC.2008.4631210
Attributes:
Name (List[Str]): List of strings representing algorithm name.
LSs (Iterable[Callable[[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray, Task, Dict[str, Any]], Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, int, numpy.ndarray]]]): Local searches to use.
BONUS1 (int): Bonus for improving global best solution.
BONUS2 (int): Bonus for improving solution.
NoLsTests (int): Number of test runs on local search algorithms.
NoLs (int): Number of local search algorithm runs.
NoLsBest (int): Number of locals search algorithm runs on best solution.
NoEnabled (int): Number of best solution for testing.
See Also:
* :class:`NiaPy.algorithms.Algorithm`
"""
Name = ['MultipleTrajectorySearch', 'MTS']
[docs] @staticmethod
def algorithmInfo():
r"""Get basic information of algorithm.
Returns:
str: Basic information of algorithm.
See Also:
* :func:`NiaPy.algorithms.Algorithm.algorithmInfo`
"""
return r"""Lin-Yu Tseng and Chun Chen, "Multiple trajectory search for Large Scale Global Optimization," 2008 IEEE Congress on Evolutionary Computation (IEEE World Congress on Computational Intelligence), Hong Kong, 2008, pp. 3052-3059. doi: 10.1109/CEC.2008.4631210"""
[docs] @staticmethod
def typeParameters():
r"""Get dictionary with functions for checking values of parameters.
Returns:
Dict[str, Callable]:
* M (Callable[[int], bool])
* NoLsTests (Callable[[int], bool])
* NoLs (Callable[[int], bool])
* NoLsBest (Callable[[int], bool])
* NoEnabled (Callable[[int], bool])
* BONUS1 (Callable([[Union[int, float], bool])
* BONUS2 (Callable([[Union[int, float], bool])
"""
return {
'M': lambda x: isinstance(x, int) and x > 0,
'NoLsTests': lambda x: isinstance(x, int) and x >= 0,
'NoLs': lambda x: isinstance(x, int) and x >= 0,
'NoLsBest': lambda x: isinstance(x, int) and x >= 0,
'NoEnabled': lambda x: isinstance(x, int) and x > 0,
'BONUS1': lambda x: isinstance(x, (int, float)) and x > 0,
'BONUS2': lambda x: isinstance(x, (int, float)) and x > 0,
}
[docs] def setParameters(self, M=40, NoLsTests=5, NoLs=5, NoLsBest=5, NoEnabled=17, BONUS1=10, BONUS2=1, LSs=(MTS_LS1, MTS_LS2, MTS_LS3), **ukwargs):
r"""Set the arguments of the algorithm.
Arguments:
M (int): Number of individuals in population.
NoLsTests (int): Number of test runs on local search algorithms.
NoLs (int): Number of local search algorithm runs.
NoLsBest (int): Number of locals search algorithm runs on best solution.
NoEnabled (int): Number of best solution for testing.
BONUS1 (int): Bonus for improving global best solution.
BONUS2 (int): Bonus for improving self.
LSs (Iterable[Callable[[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray, Task, Dict[str, Any]], Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, int, numpy.ndarray]]]): Local searches to use.
See Also:
* :func:`NiaPy.algorithms.Algorithm.setParameters`
"""
Algorithm.setParameters(self, NP=ukwargs.pop('NP', M), **ukwargs)
self.NoLsTests, self.NoLs, self.NoLsBest, self.NoEnabled, self.BONUS1, self.BONUS2 = NoLsTests, NoLs, NoLsBest, NoEnabled, BONUS1, BONUS2
self.LSs = LSs
[docs] def getParameters(self):
r"""Get parameters values for the algorithm.
Returns:
Dict[str, Any]:
"""
d = Algorithm.getParameters(self)
d.update({
'M': d.pop('NP', self.NP),
'NoLsTests': self.NoLsTests,
'NoLs': self.NoLs,
'NoLsBest': self.NoLsBest,
'BONUS1': self.BONUS1,
'BONUS2': self.BONUS2,
'NoEnabled': self.NoEnabled,
'LSs': self.LSs
})
return d
[docs] def GradingRun(self, x, x_f, xb, fxb, improve, SR, task):
r"""Run local search for getting scores of local searches.
Args:
x (numpy.ndarray): Solution for grading.
x_f (float): Solutions fitness/function value.
xb (numpy.ndarray): Global best solution.
fxb (float): Global best solutions function/fitness value.
improve (bool): Info if solution has improved.
SR (numpy.ndarray): Search range.
task (Task): Optimization task.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float]:
1. New solution.
2. New solutions function/fitness value.
3. Global best solution.
4. Global best solutions fitness/function value.
"""
ls_grades, Xn = full(3, 0.0), [[x, x_f]] * len(self.LSs)
for k in range(len(self.LSs)):
for _ in range(self.NoLsTests):
Xn[k][0], Xn[k][1], xb, fxb, improve, g, SR = self.LSs[k](Xn[k][0], Xn[k][1], xb, fxb, improve, SR, task, BONUS1=self.BONUS1, BONUS2=self.BONUS2, rnd=self.Rand)
ls_grades[k] += g
xn, xn_f = min(Xn, key=lambda x: x[1])
return xn, xn_f, xb, fxb, k
[docs] def LsRun(self, k, x, x_f, xb, fxb, improve, SR, g, task):
r"""Run a selected local search.
Args:
k (int): Index of local search.
x (numpy.ndarray): Current solution.
x_f (float): Current solutions function/fitness value.
xb (numpy.ndarray): Global best solution.
fxb (float): Global best solutions fitness/function value.
improve (bool): If the solution has improved.
SR (numpy.ndarray): Search range.
g (int): Grade.
task (Task): Optimization task.
Returns:
Tuple[numpy.ndarray, float, numpy.ndarray, float, bool, numpy.ndarray, int]:
1. New best solution found.
2. New best solutions found function/fitness value.
3. Global best solution.
4. Global best solutions function/fitness value.
5. If the solution has improved.
6. Grade of local search run.
"""
for _j in range(self.NoLs):
x, x_f, xb, fxb, improve, grade, SR = self.LSs[k](x, x_f, xb, fxb, improve, SR, task, BONUS1=self.BONUS1, BONUS2=self.BONUS2, rnd=self.Rand)
g += grade
return x, x_f, xb, fxb, improve, SR, g
[docs] def initPopulation(self, task):
r"""Initialize starting population.
Args:
task (Task): Optimization task.
Returns:
Tuple[numpy.ndarray, numpy.ndarray, Dict[str, Any]]:
1. Initialized population.
2. Initialized populations function/fitness value.
3. Additional arguments:
* enable (numpy.ndarray): If solution/individual is enabled.
* improve (numpy.ndarray): If solution/individual is improved.
* SR (numpy.ndarray): Search range.
* grades (numpy.ndarray): Grade of solution/individual.
"""
X, X_f, d = Algorithm.initPopulation(self, task)
enable, improve, SR, grades = full(self.NP, True), full(self.NP, True), full([self.NP, task.D], task.bRange / 2), full(self.NP, 0.0)
d.update({
'enable': enable,
'improve': improve,
'SR': SR,
'grades': grades
})
return X, X_f, d
[docs] def runIteration(self, task, X, X_f, xb, xb_f, enable, improve, SR, grades, **dparams):
r"""Core function of MultipleTrajectorySearch algorithm.
Args:
task (Task): Optimization task.
X (numpy.ndarray): Current population of individuals.
X_f (numpy.ndarray): Current individuals function/fitness values.
xb (numpy.ndarray): Global best individual.
xb_f (float): Global best individual function/fitness value.
enable (numpy.ndarray): Enabled status of individuals.
improve (numpy.ndarray): Improved status of individuals.
SR (numpy.ndarray): Search ranges of individuals.
grades (numpy.ndarray): Grades of individuals.
**dparams (Dict[str, Any]): Additional arguments.
Returns:
Tuple[numpy.ndarray, numpy.ndarray, numpy.ndarray, float, Dict[str, Any]]:
1. Initialized population.
2. Initialized populations function/fitness value.
3. New global best solution.
4. New global best solutions fitness/objective value.
5. Additional arguments:
* enable (numpy.ndarray): If solution/individual is enabled.
* improve (numpy.ndarray): If solution/individual is improved.
* SR (numpy.ndarray): Search range.
* grades (numpy.ndarray): Grade of solution/individual.
"""
for i in range(len(X)):
if not enable[i]: continue
enable[i], grades[i] = False, 0
X[i], X_f[i], xb, xb_f, k = self.GradingRun(X[i], X_f[i], xb, xb_f, improve[i], SR[i], task)
X[i], X_f[i], xb, xb_f, improve[i], SR[i], grades[i] = self.LsRun(k, X[i], X_f[i], xb, xb_f, improve[i], SR[i], grades[i], task)
for _ in range(self.NoLsBest): _, _, xb, xb_f, _, _, _ = MTS_LS1(xb, xb_f, xb, xb_f, False, task.bRange.copy() / 10, task, rnd=self.Rand)
enable[argsort(grades)[:self.NoEnabled]] = True
return X, X_f, xb, xb_f, {'enable': enable, 'improve': improve, 'SR': SR, 'grades': grades}
[docs]class MultipleTrajectorySearchV1(MultipleTrajectorySearch):
r"""Implementation of Multiple trajectory search.
Algorithm:
Multiple trajectory search
Date:
2018
Authors:
Klemen Berkovic
License:
MIT
Reference URL:
https://ieeexplore.ieee.org/document/4983179/
Reference paper:
Tseng, Lin-Yu, and Chun Chen. "Multiple trajectory search for unconstrained/constrained multi-objective optimization." Evolutionary Computation, 2009. CEC'09. IEEE Congress on. IEEE, 2009.
Attributes:
Name (List[str]): List of strings representing algorithm name.
See Also:
* :class:`NiaPy.algorithms.other.MultipleTrajectorySearch``
"""
Name = ['MultipleTrajectorySearchV1', 'MTSv1']
[docs] @staticmethod
def algorithmInfo():
r"""Get basic information of algorithm.
Returns:
str: Basic information of algorithm.
See Also:
* :func:`NiaPy.algorithms.Algorithm.algorithmInfo`
"""
return r"""Tseng, Lin-Yu, and Chun Chen. "Multiple trajectory search for unconstrained/constrained multi-objective optimization." Evolutionary Computation, 2009. CEC'09. IEEE Congress on. IEEE, 2009."""
[docs] def setParameters(self, **kwargs):
r"""Set core parameters of MultipleTrajectorySearchV1 algorithm.
Args:
**kwargs (Dict[str, Any]): Additional arguments.
See Also:
* :func:`NiaPy.algorithms.other.MultipleTrajectorySearch.setParameters`
"""
kwargs.pop('NoLsBest', None)
MultipleTrajectorySearch.setParameters(self, NoLsBest=0, LSs=(MTS_LS1v1, MTS_LS2), **kwargs)
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