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Algorithm na Bincike na gida (Local Search) a cikin PHP: Fahimta, Misali & Aiwatarwa

Algorithm na Bincike na Gida hanya ce mai mahimmanci a cikin shirye-shiryen PHP, ana amfani da ita don nemo mafi kyawun bayani a cikin iyakataccen sarari bincike. Ana amfani da wannan algorithm galibi a cikin matsalolin haɓakawa, neman daidaitawa mafi kyau, da magance ƙalubalen ingantawa.

Yadda Algorithm Neman Gida ke Aiki

Algorithm na Bincike na Gida yana mai da hankali kan inganta ingantaccen bayani ta hanyar ƙananan matakai. Ya ƙunshi matakai masu zuwa:

  1. Gano Maganin Farko: Algorithm ɗin yana farawa da farkon maganin matsalar.
  2. Ƙayyade Sararin Ƙungiya: Algorithm yana bayyana sararin yanki na mafita na yanzu, wanda ya haɗa da mafita waɗanda za a iya samu ta hanyar yin ƙananan canje-canje.
  3. Ƙimar Maganin Maƙwabta: Algorithm yana kimanta ingancin mafita na makwabta ta hanyar kwatanta su da mafita na yanzu.
  4. Zaɓi Magani Mafi Kyau: Idan maƙwabcin maƙwabci ya fi na yanzu, algorithm ya zaɓi maƙwabcin maƙwabcin azaman mafita na yanzu. Ana maimaita wannan tsari har sai an sami ƙarin ci gaba.

Fa'idodi da rashin Amfanin Algorithm na Bincike na Gida

Amfani:

  • Inganci ga Manyan Wuraren Bincike: Algorithm ɗin bincike na gida galibi yana da inganci tare da manyan wuraren bincike idan aka kwatanta da algorithms bincike na duniya.
  • Sauƙin aiwatarwa: Wannan algorithm gabaɗaya yana da sauƙin aiwatarwa kuma ana iya keɓance shi don takamaiman matsaloli.

Rashin hasara:

  • Rashin Garantin Bincike na Duniya: Wannan algorithm na iya haifar da mafi kyawun mafita na gida wanda ba shine mafi kyawun mafita na duniya ba.
  • Dogaran farawa: Sakamakon algorithm na iya yin tasiri ta hanyar mafita ta farko.

Misali da Bayani

Yi la'akari da matsala mai sauƙi na ingantawa: gano mafi ƙarancin ƙimar aikin $f(x) = x^2$ tsakanin kewayon -10 zuwa 10 ta amfani da Algorithm na Gida a cikin PHP.

function localSearch($function, $initialSolution, $neighborhood, $iterations) {  
    // Implementation of local search algorithm  
    // ...  
}  
  
$function = function($x) {  
    return $x * $x;  
};  
  
$initialSolution = 5;  
$neighborhood = 0.1;  
$iterations = 100;  
  
$optimalSolution = localSearch($function, $initialSolution, $neighborhood, $iterations);  
echo "Optimal solution: $optimalSolution";

A cikin wannan misalin, muna amfani da Algorithm na Bincike na Gida don nemo mafi ƙarancin ƙimar aikin $ f(x) = x ^ 2$ a cikin kewayon daga -10 zuwa 10. Algorithm yana neman mafita na makwabta ta hanyar yin ƙananan canje-canje ga ƙimar. da $ x$. Bayan kowane mataki, algorithm yana zaɓar mafi kyawun maƙwabcin maƙwabta azaman mafita na yanzu. Sakamakon shine darajar $ x$ kusa da mafi ƙarancin ƙimar aikin $f(x)$ a cikin kewayon kewayon.

Duk da yake wannan misalin yana kwatanta yadda Algorithm na Bincike na Gida zai iya inganta ƙima a cikin iyakataccen iyaka, ana iya amfani da shi zuwa wasu matsalolin ingantawa a cikin PHP, kamar gano madaidaitan sigogi don ƙira ko inganta tsarin tsarin.