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Centro Unv*rsitário Santo Agostinho
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www*.fsanet.com.*r/revista
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Rev. FSA, Tere*i*a, *. *8, n. 7, art. 10, p. 160-172, *u*. 20*1
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ISSN Impresso: *806-6356 I*SN Ele*rônico: 2317-2983
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http://dx.doi.org/10.12819/20*1.18.7.10
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*ybrid Metaheuristic Algorithm (*a*ac) Used in *pt*mizat**n of Vacuum Coo**ng Treatmen* of
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Postharv*st Br*c*oli
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Algor*tmo Metaheur**tico *íbrido (Sa*ac) U*ado na *t*mizaçã* do Tratamento de
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Res*ri*mento a Vácuo do ***ccolis Pó*-Colheita
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Marco *ntônio Ca*pos Benveng*
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Doutorado em Eng*nh*ria de Produção *ela Unive*si*ade Paul**ta
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Mest*e e* Engenharia *e **odução p*la Universidade *o*e de Julho
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*-mail: marcoc*mpos453@yahoo.com
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*ren*lza de Alenca* Nää*
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Do*tora *m PhD in Ag*ic*l*ural Engi*eer*ng Michigan St*te University
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Professora da Un*versidade Paul*s*a - *N*P
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E-*ail: i*eni**a.naas@docente.un*p.*r
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End*reço: Marco *ntonio C**p*s Benvenga
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Editor-Chefe: *r. Tonn* K*rley de Al**c*r
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Av. *aulista, *00 - Bela Vis**, São Paul* - SP, 0131*-
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Rodrigue*
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100. B*asil.
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Ende*eço: Iren*lza de *lencar Nä**
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Artigo re*ebido em 14/06/2*21. Ú*t*ma
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versão
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Av. Paulist*, 9*0 - Bela V*sta, São **ulo - SP, *1310-
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recebida em 27/06/*021. Ap**vado em 28/06/2021.
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100. Bras*l.
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Avalia*o pelo sistema Triple Rev*ew: Des* R*view a)
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pel* Editor-Ch*fe; e *) D*ubl* Blind Review
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(*valiação cega por doi* avaliado*es d* á*ea).
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Rev*são: Gramatical, Norm*tiva e de Fo*ma**ção
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Hyb*id Met*heuri*t*c Alg*rithm (Sagac) Used i* Opt*mization of Vac*um Cooling Treat*e**
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16*
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ABSTRACT
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*his researc* aim* to analyze t*e applicat*on of the hybrid metaheurist*c a*go*ithm SAGAC,
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which is composed *f the S*mul*ted Annealing (SA) and Genet*c Algorith* (GA) t*chniques
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*ith the inclusion of a converg*nce accel**ation (AC) mechanism. SAGAC was u*e* *o
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o*t i m i z e
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t **
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pos*ha*v**t broccol* vacuu* cooling *rocess. Anot*e* concer* included in the
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algorith* i* p*pulation di*ersity, and, for t*i* *i*u**ion, a high mut*tion rate (40%) and a l*w
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e*itis* rate (10%) w*re used. Th* object*ve of maintaining population diversi** is to avoid
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prem*ture and undue convergen*e *f the res*lts curve. *h* S*GAC algorithm's performance
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w*s compar*d *ith another type of a*proach *n
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*ptimizing this process, w*ich *sed the
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Res*on*e Surface (R*M) methodol*gy
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comb*n*d w**h th* G*n**ic Algo*ith* (G*), *ere,
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*all*d *SMGA *n thi* present st*d*. *he resu*ts obt*ined sh**e* that the SA*AC algorithm
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obtained be*ter results concerning RSMGA in op*imizing this process.
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Key-wo*ds: Algorithms. Optimization. SAGA*. Metah*urístics.
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RESUMO
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Esta *esquisa t*m o o*jetiv* d* anal*sar a aplicação do algo**tmo *etaheurís*ico híbrido
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S*GAC, o qual é composto dos algoritmos, Si**lated Annealing (S*) e o Algoritmo
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Genéti*o (GA) co* a inclusão de um me*anismo de aceleração de conve*gência *e re*ultados
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(AC). O SAGAC foi u*ado par* otimizar o *rocesso de *esfr*amen*o à vác*o do brócolis após
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a col*eita. Outra preocup*çã* incluída no a*goritmo é a diversid*de da popula*ão, e, para essa
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s*tuação, foram u*ilizadas uma alta t**a de mutação (4*%) e
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uma baixa ta*a de elitismo
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(10%). O obje*i*o de ma*t*r a diversidade popul*cional é e*itar a convergênc*a pr*m**ura e
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indevida d* curva *e resulta*os. O
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des*mpenho do
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algoritmo SA*AC *o* com*arado com
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*utro tipo de abor*ag*m na o*imização de*te *roce*so, que ut*li*ou a metodologi* *e
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Superf**ie de Resposta (*S*) combinada *om o *lg**itmo Genético (GA), *q*i,
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denominado RSMGA no pre*ente estudo. *s resultados *btidos m*straram qu* o a*gor*tmo
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SA*AC obteve mel*ores r*sultados em relaçã* ao RS*GA *a ot*mização des*e proce*so.
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Pa*a*ras-chave: Al*o*it*o*. Otim*zação. SAG*C. Metaheu*ística.
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*ev. FSA, Ter*sina PI, v. 18, n. 7, art. 10, p. 16*-172, jul. 202*
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www4.fsa*et.com.br/revista
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M. A. C. Be**enga, I. A. Nääs
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*62
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1 INTR*DUCTION
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According to Santana et al. (2*18), broccol* is a fo** ri*h in vitamin C, f*ber, and
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***tiple *ther nut*ients with potent *nti-c*n*er prop*r*ie*. In t*e wor*d, *hina and India are
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the largest pr*ducers of this **getable, and toge*her they pro*uce *ore th** 7*% of all glob*l
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product*on. According to *an*ana et al. (2018), broccoli has * sho*t shelf *ife at room
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t*mperature. **nce, the *earch fo* effic*ent ways to preserve this type o* food's **lidity and
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n*triti*n** *r*p*rtie* b*comes *ssential.
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In *lib*s & K**sal (2014), Ca*valho & Clemente (2004), and Corcuf* et *l. (1*96),
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there are several techniq*es to improv* the shelf life of food, *u*h a* dry*ng, freezin*,
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an*
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mod*f**ation in most p*c*aging. In McDonalds e* al. (2002), vacuum cooli*g i* a*hieved *y
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ra*idly remo**ng *e*t from the p*o*uct by evaporatin* wat** ***m the su*face and pores. For
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Zhan* & Sun (2006),
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vacuum cooling has been repor**d
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as a highl*
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*f*icient *ethod to
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*xt*nd t*e **elf li*e *nd impr**e biologic*l safety. According to *unes et al. (2**5), t*e*e ha*
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been an increase i* the devel*pmen* of competit**e and electr*nic approac*es to agric*ltu*al
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*a*ks *n recent decade*, *u*h as harvestin*, s**ing, gro*th
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mo*ito*ing, soi* anal**i*,
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and
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chemic** treat**nts. Such approaches, *n
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examp*e o* the menti*ned approaches, *se hybrid
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a*gorithms to *p*im*ze p*ocesses, *spec*ally to reduc* *h* *earch s*ace to find the ide*l
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cond*tio*s and, thus, r*duce t*e *om**tati*nal time (CHAVES et al.,
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2*07). A*basi &
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Mahlooji (*0*2) ap*lied **e simulate* annea**ng (SA) **chnique *n*
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th* r*sponse surface
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meth*dology (RSM) to exp**r*s the *el*tio*sh*ps between s*ve*al *xplan*tor* **riables *nd
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one or mo*e re*ponse variables.
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This research aimed to invest*gate *he SAGAC hybrid algorithm's p*rformance
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compared t* the RSMGA approach by *antana e* al. (2018) to optimiz* th*
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*osthar*e*t
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broc*oli vac*um cooli*g p*o*e*s. The *ain bene*it o* t*e pro*osed approach is *he increase
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in *he pr**ucer*' *r*fit **e to the *e*uction *btained with the *mp*eme*ta*ion o* th* SAGAC
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algorithm.
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2 MATERIALS AND *ETH**S
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*.1 Vacuum coolin* t*eatments
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**cording to Santa*a et al. (2018), t*e vacuum coolin* *reatme*t w*s *mple*ented b*
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a s*l*-develo*ed vacuum cooler w*th a wat**-sprayi** unit *onnected w*t* the wate* pipe and
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Re*. FSA, Teres*na, *. 18, n. 7, art. 1*, p. 160-172, *ul. 20*1 *w*4.fsanet.*om.br/revis*a
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Hyb*id Metaheuristic Algorithm (S*gac) Used in O*ti*iza*ion *f Vacuum C*oling *reat*ent
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163
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vacuum chamber. The water-sp*a*ing volume ca* be controlled in *his sy**em.
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Th*
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equipment was d*vel*ped in **romed steel, with a* int*rnal vo**me of 1m3, and *t was made
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i*
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the Departmen* o*
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Food Scienc* and *u**ition, Sc*ool of Biosystems *ngineerin* and
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F*od *cie*ce, Zhejiang U*ive**ity, *ity of Hangzhou, *hejian* Prov*nce, Ch*n*. *n this
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study, the pressure in the vacuum cham*er (200, 400, *nd 600 Pa), *he wa*er-sprayi*g
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*olu*es (3%, 4%, and6%), *nd the p*oc*ssin* *ime (*0, 30, and 40 mi*) were *ar**d to
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in*e*tigate th*ir *ynthetic effects on the weight loss(Wloss) of b**c*oli durin* t*e vac*um
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cooling process (*libas & Koksal, *014; D*n* et a*., *0*1; Zhang & Sun, 2006).**e
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p*ocessing **m* is *h* cooling *ime *e*uir*d to r*ach the e*perim*ntal design pressure
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*onditions wit*in the re*rigerator.
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2.2 *odeling p*ocess
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An *xperim**tal design was u*ed f*r the organ*zation of the ass*y of this exp*rimen*.
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*fter the experiments' execution (duplicate), the minimum **uare *eth*d wa* applied to the
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experimental *ata to *btain the model (Santana et al., 2018). Wa* con*id*red *he f*llowing
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*actors: pressure, * (*1), bro***li weig*t, W (x2), water vo**me, * (x3), and proce*sing time, t
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(x*); as well as the fo*lowing respons*s: loss of we*ght (y*), Wloss, and end t*mperatur*(y2),
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T*nd. Because o* the effect *f inconsistenc*es cause* dur*ng the computations, *t was ne*es**ry
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*o norma*iz* the variable* xi[1, *].
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The mathematical f**mulation of this pro*le* is summarized in the fol*owing
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*quation*:
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We*ght loss is cal*ul*ted by equation
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(1)
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The end tempera*ure is *alc*l*ted b* *quati*n
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(*)
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Do*ain of varia**es:
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x1 [200 ; 600]; x2 [200 ;500]; *3 [0.*3 ;0.06]; x4 [20 ;40]
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Rev. FSA, Te*e*ina PI, v. 18, n. 7, art. 10, p. 16*-*7*, j*l. 2021 www*.*sanet.*om.br/revista
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whe*e *nd are t*e w*ight of Wloss and T*nd, resp**tively.
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The norma*i*ed val*es of variabl*s are calcu*ated b* equatio*
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(4)
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In China, the typi*al p*i*e f*r broccoli i* 4.* US$/ kg, and *or kWhis 8 cents. These *alues
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were used to calcu*at* Eq.'s *ot*l profit (5) (S*NTANA et a*., 2018).
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(*)
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The success of any bus*nes* is related to maxim*zi*g profits. *n t*is case study, it is
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related *o the m*nimization of Wloss. Then, if minimu* Wloss is found, *h* ma*imum profit
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will *e f*und as wel*.
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</page><line>
Re*. FSA, Teresina, v. *8, n. 7, a**. 1*, *. 160-172, jul. 2021
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www4.fsanet.*om.br/revista
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Hy*rid Metaheuristic Algorithm (S*ga*) Used in O*timization of Vacuum Cooling Tr*atment
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*65
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3 *HE HYBR** MET*HEURIST*C *LGORIT*M (S*GAC)
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*wo algorit*ms form *h* al*ori*hm: the Simulated *nnealing (SA) and *he Genetic
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Algorithm (AG) wi*h *he i*clusio* of a *echa*ism (func*ion) that *r*motes an acceleration in
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the con*er*e*ce (A*AC) of the obtain*d results.
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The *A a*g*ri*hm a*ts o* *he *eneratio* of i*dividuals who make *p the modified
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genetic a**orithm's i*itial populat*on (A***). With the *se *f the SA algorithm, i* is poss*ble
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to have *he c*mpo*it*on of a g*od qu*lity initial popu*ation, that is, pre-opt*mized i*divid*als.
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The routine behav*or of the AGAC algorithm prom*tes Conve*gence Accelerati*n in
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which, aft*r cr*ssi*g, th*re is an ass**sment of the in*ividuals (Sons) generate* and a check
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**r qu*lity imp*ovement co*ce*ning th* indivi*uals of
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the elite gro*p of the populat*on. If
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s*c* *ev*lop*ent
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d**s not occur, the in*ivi**al (s) of the child(ren) is(are) discarded,
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t *e
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individual (paren*) of the worst *uality is e*changed for a*o*her indiv*dual ** the el*t* group
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*ho is closest and is bett*r *h** **e ind*vidual (Father) who w*s chang*d.
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A*ter the individual'* chan*e (*ather), a new crossing occu*s f*r the mis*in* *hil*'s
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generation (s). This sequ*nce o* s*eps will be repeated u*til bo*h chi*dren meet th* c*it**ia fo*
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imp*ovement or the stipulated number of at*empt* is reached. Fi*ure 1 s*ows the flowch**t o*
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the SAGAC hybr*d algorithm.
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</page><line>
Rev. *SA, Teresina PI, v. 18, n. 7, art. 10, p. *60-17*, *ul. 2021
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www4.fsanet.com.br/rev*s*a
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M. A. *. Benve*ga, I. A. Nääs
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166
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Figure 1 - Sc*eme of the *ybrid SAGAC algori**m.
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Y*s
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Stoping
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Apply SA to
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Cr*teria
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*inish
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improv* I*d***dua*
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OK?
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N*
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Save Imp*oved
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Select best
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Individual in Initial
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Individu*ls
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*opulation
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Yes
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Crossov*r
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Q*y.AGAC
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Initial
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Population OK?
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With ea*h cycle *f proce*si*g of the Simula*ed Annealing (SA) algorit*m, the b*st
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*esult (individua*) is store* t* compo*e the initial po*ulation used by the modified Genetic
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*lgor*thm w*th con*erg*nce acceler*tion mec*an*sm (AGAC).
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Figure 2 show* the original scheme of a G*net** Algorithm, a*d, in *eque*ce, *i*u*e 3
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s*o*s the Genetic *lgorithm wit* *he inc*usi** of the conve*gence acc*leration mecha*ism.
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</page><line>
Rev. *SA, Ter*sina, v. 18, n. 7, art. 10, p. 160-172, ju*. 2**1
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www4.fsa*et.com.*r/revist*
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Fi*ure 3-Sc*eme *f a Genetic Alg*rith* w*th conve*gence acceleration m*c*anism.
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F*gure* 2 a*d 3 show the chang* in the Genetic Algo*ithm u*ing the c*nv*rgence
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acceleration m*chanism. *his m*c*anism in*rease* the *robability of a contin*o*s
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i*dividual*' evol*tion o*er the generations. In eac* ge*eration of o*f*prin*, the alg*ri*hm
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c*ecks whether they h*ve the minimum qua*ifications to *e part of the elit* and, if this doe*
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R*v. FSA, Teresina P*, v. 18, n. 7, art. 10, *. 160-*72, jul. 2021
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*ww4.f**net.com.br/revista
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M. A. C. Ben*enga, I. A. Nää*
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168
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no* *ccur, *here is a dispo*al of these off*prings and the generation of othe*s, after changin*
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one of the parents with the worst evaluation.
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3.*.*etu* *arameters of SAGAC
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In S*GA*, *he va*iables that influence the algorithm's behavior are its processing
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p*ra*e*ers (*OUZA et al. 2017, *A*TANA et al. *011, *ITCHEL 1997, KIRKPATRICK
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et al. 198*).
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Parameters of SA
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1º. Initial Te*perat*r* = 1*0;
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It is the n*mb*r of cycles that wil* be processe* *n an algo*i*hm repetit*on lo**;
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2º. TDS = 1;
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Figure 4 shows the
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evo*ution cur*es of the va*ues of the factors Wloss, Tend, an*
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t he
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v*lue of *he O*jective Func**on (OF) of t*e be*t individuals *n each generati*n during the
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1*00 gene*ations p**cessed by *he SAGAC algorithm.
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</page><line>
R*v. FSA, *er*s*na, v. 1*, n. 7, *rt. 10, p. 160-172, jul. 2*21
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www4.**anet.*om.br/re**sta
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Hybrid Meta*eu*ist*c A*gori*hm (S*gac) *sed in Opt*miz*tion of Vacuum *ool*ng Treatment
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1*9
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F*gure 4-Behavior *f Wloss, Te*d, and Objecti*e *unction (OF) fac*ors in
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optimizingb*occol*'s vacuum coolin* process.
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3
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Ge**rations x 1*0
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OF
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T*nd
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W*oss
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</par><par>
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It *s noted in F*gur* 4 th*t the Tend and OF fact*r* pre*ent ** osci*la*ing *ehavior an*
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dif*erent **om the *loss factor, *hich p*esen*s * *egative converg***e, whi*h means
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a
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d**rease in th* weight loss of the p*oduct. *he *n*rease i* p**fit is inv*rsely rel*ted to the
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<line>
d*crease in the Wloss factor.
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<line>
Ne*t, in Fi*ure 5, the "P**fit" co*ve*gence curve is show*.
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</par><par>
</page><line>
Rev. F*A, Ter*sina PI, v. 18, n. 7, *rt. *0, p. 160-172, jul. 2021
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*ww4.fsanet.com.br/r**ista
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</par><page>
<par>
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M. A. C. Benvenga, I. *. Nääs
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170
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</par>
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96,151 7
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2
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5
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6
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7
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8
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9
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10
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G*nerations x 1**
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Figure 5 indicates tha* after 600 generations pr*ces**d by SAG*C, there is a
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stabiliz*tion of the curve conver*ence, with small *ain*.
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<line>
Table 1 *ompares the res*l** obtained by *he RSMGA and SAGAC alg*rithms in
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<line>
optimizing vacuum cooling treatment o* p*stharvest broc*oli.
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<line>
Table 1-Co**a*is*n of t** RSMGA and SAGAC algor*th*s' results to optimizethe
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v*cuum *ooling of br*ccoli.
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A*g*rith
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</par><par>
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m
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X1
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X2
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X3
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Wloss
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Tend
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OF
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P*of*t
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273,5 to
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RSMGA
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SAGAC
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9 9 ,7 3
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</par><par>
<line>
W**h the data presented in Table 1, w* can *ee tha* the S*GAC al**r*thm obtained the
</line>
<line>
best results concern*n* the Wloss *nd Pro*i* values. A*t*r all, this *s the object*ve of this
</line>
</par><par>
</page><line>
*ev. FSA, Ter*sina, v. 18, n. 7, art. 10, p. 160-*72, j**. **21
</line>
<line>
www4.f*anet.com.br/re*ist*
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</par><page>
<par>
<line>
Hy*rid Metaheuristic Al*orith* (*agac) Used in Optimization of *acuum Cooling Treatment
</line>
<line>
**1
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</par><par>
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optim*zation **o*e*s, that is, to mi*imize pr*duct w*i*ht *o*s and con**quently maximi*e
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p*ofit.
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<line>
5 CO*CLUSIONS AND FUTURE WORK
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A hy*rid *etahe*r*st*c algorithm was p*o*osed to obt*in better res**ts in op*imizing
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<line>
*** vacuum cooli*g **oce** of b*occoli after har*es*, coming from *he union of the *imulated
</line>
<line>
Annealing (SA) alg**ithms a*d *he G*ne*ic Algorithm with a converge*ce acceleration
</line>
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mechanism. (AGAC) *h*ch was nam*d SAGAC. In t*e proposed app*oach, SA has t**
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</par><par>
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function
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of pro*iding the initia* po*ulat*on of the AGAC with individual* o* better quality
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than individuals gene*ated a* random. This st*a**gy works as a
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pr*-op*imiza**o*
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of
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t he
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</par><par>
<line>
pro*ess. Upon *eceiving
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t *i s
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<line>
init**l pr*-o*timized popu*ati*n, A*AC raises
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the quali** of
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</par><par>
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these individu*ls to a higher lev*l.
</line>
<line>
The results *btaine* sh*w a better pe*form*nce of the SAGAC, m*in*y when we refer
</line>
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to minimizing *he prod*ct's weight loss (broccoli) and the maximizatio* of *he *rofit.
</line>
<line>
The SAGAC algorithm showed its poten*ial in opti*izing t** vacuum cooling process
</line>
</par><par>
<line>
of
</line>
<line>
*ro*coli after
</line>
<line>
har*e*ting. * st*dy of its p*ocessi*g parameters *e*ains a sug**stio* for
</line>
</par><par>
<line>
future *ork as a for* o* inves*iga*ion to improve pe*formance. A*ditionally, *he S*GAC
</line>
<line>
algorithm could be implemented to op*imi*e other actual processes in future works.
</line>
<line>
REF*RENCES
</line>
<line>
Ab*a*ia B., Mahl*o*ib H., Impr*ving respons* surface me**odology *y *sing *rtificial ne*ral
</line>
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network a*d simula*ed annealing, Expert System* with Application*, Vol*me *9, Issue 3, 15
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February *012, Pag*s 3*61-*46*, Elsevier, 2012.
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Alibas, I., Koksa*, N., *or*ed-air, va*uum, and hydro precooli*g of *aul*f*ower
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(Brassic*ol*aracea L. *ar. botr**is cv. Fre*m*nt): part I. De t*rmination of precool**g
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parameter*. Food Sci. Tech n*l. 34 (4), 7*0-73*, 2014.
</line>
</par><par>
<line>
Carvalho, P.T., Clemente, *., T*e infl*enc* of the
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broccol* (Bra*sicaolerace* var.it**ica)*i**
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</par><par>
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*eigt* on p*s*harv*st quality. Food Sc*. Tech n*l. 24 (4), 646-651, 2014.
</line>
</par><par>
<line>
Corcuff, R., Arul, J., Hamza, F., Cast*igne, *., Ma*hlouf, J., Storage
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*f brocc*li flor*ts i*
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</par><par>
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et*anol vapor enriched *tmosp*eres. Postharvest Biol. Tech nol. 7, 219-229, *996.
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Funes, E., Allouche, Y., Beltrán, G., *imén**, A., A review: artificial neural ne*works as tool
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for control food industry process. J. Se*s. Technol. 5 (1), 28-*3.2015.
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</page><line>
*ev. F*A, Ter**in* PI, v. **, n. 7, art. 10, *. 160-172, ju*. 2021
</line>
<line>
www4.fsanet.com.br/revista
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</par><page>
</document><par>
<line>
M. A. C. Benvenga, I. A. Nääs
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172
</line>
</par><par>
<line>
Li*den, R,Algorit**s Gen*ticos - Uma impo*tante ferramenta de inteligênci*
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compu**cional,2a.e*., Bras*ort, 20**.
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Sant*na, J. C. C., Araujo, S. A., Alv*s, W. A. L., Belan, P. A., *iangang, L., Jianchu, C.,
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Dong-Hong, L., ***imization o* *acuum cooling treatment o* p*sthar*est broc*ol* using
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response surface *ethodology combined with geneti* algorith* tech**que, Computers a*d
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Electronics in Agriculture, El*evier, 2018.
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<line>
*cDonald, K., Sun, D.W., Lyn*, J.G., Effect of vac*um **ol ing on the th*rmo physical
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propert*es of a *ooke* beef p*oduct. J. Food Eng. 52, 167-17*, 2*02.
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Zhang, Z.H., Sun, DW, Effe*t of cooling methods on the coo*in* efficienci*s and qu*lities of
</line>
<line>
cooked bro*co** and carro* sl*ces. J. Food E*g. 77, 32*-326, 2006.
</line>
</par><par>
<line>
Como Referenciar *s*e A*tigo, c*nf*rme ABNT:
</line>
<line>
BEN*ENGA, M. A. C; NÄÄS, I. A. Hy**id M*t*heuristic *lgo*ithm (Sagac) U*ed in Optimization
</line>
<line>
of *acu*m Cooling Tre*tment *f *ostharvest Broccoli. *ev. F*A, Teresina, v.18, n. 7, art. 10, p. 160-
</line>
<line>
17*, jul. 2*21.
</line>
</par><par>
<line>
*ontribu*ção dos Auto*es
</line>
<line>
M. A. C. Benveng*
</line>
<line>
I. A. *ääs
</line>
</par><par>
<line>
*) concepção * pl*n*jame*to.
</line>
<line>
X
</line>
<line>
X
</line>
</par><par>
<line>
2) análise e interpretaç*o d*s da*os.
</line>
<line>
X
</line>
<line>
X
</line>
</par><par>
<line>
*) e*aboraç*o do rascunh* ou na revi*ão críti*a *o conteúdo.
</line>
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*
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*
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</par><par>
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4) participaçã* na aprovação da ver*ão final do *anu**rito.
</line>
<line>
X
</line>
<line>
X
</line>
</par><par>
</page><line>
Rev. FSA, Teresina, v. *8, n. 7, art. 1*, *. 160-172, ju*. 2*21
</line>
<line>
*ww4.fsa*e*.com.*r/revista
</line>
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