Solver Algorithms Options

DEPS Evolutionary Algorithm

DEPS consists of two independent algorithms: Differential Evolution and Particle Swarm Optimization. Both are especially suited for numerical problems, such as nonlinear optimization, and are complementary to each other in that they even out their others shortcomings.

Setting

Description

Agentide lĂĽlituskiirus

Määrab indiviidi tõenäosuse valida diferentsiaalse evolutsiooni (DE) strateegia.

Assume variables as non negative

Mark to force variables to be positive only.

DE: ristumistõenäosus

Defines the probability of the individual being combined with the globally best point. If crossover is not used, the point is assembled from the own memory of the individual.

DE: skaleerimistegur

Ristumise ajal otsustab skaleerimistegur liikumise "kiiruse" ĂĽle.

Ă•ppimistsĂĽklite arv

Defines the number of iterations, the algorithm should take. In each iteration, all individuals make a guess on the best solution and share their knowledge.

PS: kognitiivsuskonstant

Sets the importance of the own memory (in particular the best reached point so far).

PS: ahenemiskoefitsient

Defines the speed at which the particles/individuals move towards each other.

PS: mutatsioonitõenäosus

Defines the probability, that instead of moving a component of the particle towards the best point, it randomly chooses a new value from the valid range for that variable.

PS: sotsiaalkonstant

Sets the importance of the global best point between all particles/individuals.

Show Enhanced Solver Status

If enabled, an additional dialog is shown during the solving process which gives information about the current progress, the level of stagnation, the currently best known solution as well as the possibility, to stop or resume the solver.

Size of Swarm

Defines the number of individuals to participate in the learning process. Each individual finds its own solutions and contributes to the overall knowledge.

Stagnation Limit

If this number of individuals found solutions within a close range, the iteration is stopped and the best of these values is chosen as optimal.

Stagnation Tolerance

Defines in what range solutions are considered “similar”.

Use ACR Comparator

Kui see on välja lülitatud (vaikimisi), kasutatakse BCH komparaatorit. See võrdleb kaht indiviidi vaadates esmalt nendepoolseid piirangute rikkumisi ja ainult siis, kui nood on võrdsed, mõõdab indiviidide hetkelist lahendust.

Kui see on sisse lülitatud, kasutatakse ACR komparaatorit. See võrdleb kaht indiviidi sõltuvalt käimasolevast iteratsioonist ja mõõdab nende headust teadmistega teekide kõige halvemini teadaolevate lahenduste kohta (nendepoolsete piirangurikkumiste suhtes).

Juhusliku alguspunkti kasutamine

Kui see on sisse lülitatud, siis täidetakse teek lihtsalt juhuslikult valitud punktidega.

Kui see on välja lülitatud, siis sisestatakse teeki viitepunktina parajasti olemasolevad väärtused (nagu kasutaja need andis).

Variable Bounds Guessing

If enabled (default), the algorithm tries to find variable bounds by looking at the starting values.

Variable Bounds Threshold

When guessing variable bounds, this threshold specifies, how the initial values are shifted to build the bounds. For an example how these values are calculated, please refer to the Manual in the Wiki.


SCO Evolutionary Algorithm

Social Cognitive Optimization takes into account the human behavior of learning and sharing information. Each individual has access to a common library with knowledge shared between all individuals.

Setting

Description

Assume variables as non negative

Mark to force variables to be positive only.

Ă•ppimistsĂĽklite arv

Defines the number of iterations, the algorithm should take. In each iteration, all individuals make a guess on the best solution and share their knowledge.

Show Enhanced Solver Status

If enabled, an additional dialog is shown during the solving process which gives information about the current progress, the level of stagnation, the currently best known solution as well as the possibility, to stop or resume the solver.

Teegi suurus

Defines the amount of information to store in the public library. Each individual stores knowledge there and asks for information.

Size of Swarm

Defines the number of individuals to participate in the learning process. Each individual finds its own solutions and contributes to the overall knowledge.

Stagnation Limit

If this number of individuals found solutions within a close range, the iteration is stopped and the best of these values is chosen as optimal.

Stagnation Tolerance

Defines in what range solutions are considered “similar”.

Use ACR Comparator

Kui see on välja lülitatud (vaikimisi), kasutatakse BCH komparaatorit. See võrdleb kaht indiviidi vaadates esmalt nendepoolseid piirangute rikkumisi ja ainult siis, kui nood on võrdsed, mõõdab indiviidide hetkelist lahendust.

Kui see on sisse lülitatud, kasutatakse ACR komparaatorit. See võrdleb kaht indiviidi sõltuvalt käimasolevast iteratsioonist ja mõõdab nende headust teadmistega teekide kõige halvemini teadaolevate lahenduste kohta (nendepoolsete piirangurikkumiste suhtes).

Variable Bounds Guessing

If enabled (default), the algorithm tries to find variable bounds by looking at the starting values.

Variable Bounds Threshold

When guessing variable bounds, this threshold specifies, how the initial values are shifted to build the bounds. For an example how these values are calculated, please refer to the Manual in the Wiki.


LibreOffice Linear Solver and CoinMP Linear solver

Setting

Description

Assume variables as integers

Mark to force variables to be integers only.

Assume variables as non negative

Mark to force variables to be positive only.

Epsilon level

Epsilon level. Valid values are in range 0 (very tight) to 3 (very loose). Epsilon is the tolerance for rounding values to zero.

Hargnemis- ja piiramissĂĽgavuse limiit

Specifies the maximum branch-and-bound depth. A positive value means that the depth is absolute. A negative value means a relative branch-and-bound depth limit.

Solver time limit

Sets the maximum time for the algorithm to converge to a solution.


LibreOffice Swarm Non-Linear Solver (Experimental)

Setting

Description

Assume variables as integers

Mark to force variables to be integers only.

Assume variables as non negative

Mark to force variables to be positive only.

Solver time limit

Sets the maximum time for the algorithm to converge to a solution.

Swarm algorithm

Set the swarm algorithm. 0 for differential evolution and 1 for particle swarm optimization. Default is 0.


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