Multi-criteria optimization of batch composition for the hydrometallurgical for the hydrometallurgical process of zinc production

Ova doktorska disertacija ima za cilj definisanje originalnog algoritma za formiranje optimalne mešavine od raspoloživih koncentrata cinka, kroz sedam koraka, postupnim uvoĎenjem pojedinih metoda višekriterijumskog pristupa odlučivanju, u cilju definisanja integralnog modela za rangiranje pojedinih komponenti u mešavini i višekriterijumske optimizacije sastava šarže, kao inputa u tehnološki proces. Definisan je originalni AHP – OEW – PROMETHEE (GAIA) – TOPSIS model u fazi okruženju. Ovaj model zasnovan je na poreĎenju različitih koncentrata cinka prema kriterijumima koji su definisani u modelu (korisne komponente, štetne komponente, kao i nabavna cena koncentrata). Za rangiranje pojedinih vrsta koncentrata u sastavu šarže, korišćena je PROMETHEE (GAIA) metodologija, uz primenu AHP (Analytical Hierarchy Process) i OEW (Objective Entropy Weight) pristupa u dodeljivanju težinskih parametara kriterijumima. UvoĎenjem hibridnog modela F-PROMETHEE (Fazi PROMETHEE), vrednosti svake alternative u odnosu na kriterijume, predstavljene su kao fazi brojevi. U postupku definisanja Fazi TOPSIS metodologije, odreĎena su fazi pozitivna i fazi negativna idealna rešenja. Zatim, odreĎene su distance svih alternativa od idealno pozitivnog i idealno negativnog rešenja, što je omogućilo da se odrede relativne blizine idealnom rešenju za svaki od definisanih scenarija. Definisani hibridni model na primeru optimizacije sastava šarže za hidrometalurški postupak dobijanja cinka, predstavlja poboljšanje pristupa u rešavanju problema mešavine i kao takav može biti primenjen i na druge sisteme, s obzirom da u sebi sadrži elemente koji se mogu primeniti na bilo koji drugi sistem.This doctoral dissertation is dealing with the development of original algorithm for optimal mixture formation from available zinc concentrates, through seven steps, by introduction of certain methods of multi-criteria decision making approach, in order to define an integrated model for ranking the individual components in the mixture and multi-criteria optimization of the batch composition, as input in the technological process. The original AHP – OEW – PROMETHEE (GAIA) – TOPSIS model in the fuzzy environment is defined. This model is based on a comparison of different zinc concentrates according to the criteria defined in the model (useful components, harmful components, as well as the purchase price of concentrate). PROMETHEE (GAIA) methodology was used for the ranking of certain types of concentrates in the batch composition, by application of the AHP (Analytical Hierarchy Process) and the OEW (Objective Entropy Weight) approach in the allocation of the weight parameters for the optimization criteria. With the introduction of the hybrid Fuzzy PROMETHEE model, the value of each alternative in relation to the criteria, are presented as fuzzy numbers. In the process of defining the Fuzzy TOPSIS methodology, fuzzy positive and fuzzy negative ideal solution were determined. Then, the distances of all the alternatives from ideal positive and ideal negative solutions were determined, which enabled us to determine the relative closeness to the ideal solution for each of the defined scenarios. Defined hybrid model in the case of the batch composition optimization for the hydrometallurgical process of zinc production, represents an improvement of the approach for blending problem solving and as such can be applied to other systems, since it contains elements that can be applied to any other system

AN ANFIS – BASED AIR QUALITY MODEL FOR PREDICTION OF SO2 CONCENTRATION IN URBAN AREA

This paper presents the results of attempt to perform modeling of SO2concentration in urban area in vicinity of copper smelter in Bor (Serbia), using ANFIS methodological approach. The aim of obtained model was to develop a prediction tool that will be used to calculate potential SO2 concentration, above prescribed limitation, based on input parameters. As predictors, both technogenic and meteorological input parameters were considered. Accordingly, the dependence of SO2concentration was modeled as the function of wind speed, wind direction, air temperature, humidity and amount sulfur emitted from the pyrometallurgical process of sulfidic copper concentration treatment

International trade investment agreements as an indicator of postdemocary

Zadnja je dva desetljeća sociološku i politološku raspravu obilježila ideja da se nalazimo u postdemokratskom dobu, u kojem su formalne institucije liberalne demokracije i dalje na snazi, dok istovremeno financijske elite dominiraju svim sferama demokracije te bez etičkih kočnica, a s izrazitom moći utječu na ljudska, radnička i ekološka prava. Slikovit prikaz razvoja prema postdemokraciji jest sustav međunarodnih trgovinskih sporazuma te različiti mehanizmi u njega implementirani, poput sustava rješavanja sporova između investitora i država, koji daju toliku moć financijskim elitama da su one u mogućnosti direktno utjecati na sposobnost država da samostalno donose određene regulative

Solving the Task Assignment Problem with a Variable Neighborhood Search

In this paper a variable neighborhood search (VNS) approach for the task assignment problem (TAP) is considered. An appropriate neighborhood scheme along with a shaking operator and local search procedure are constructed specifically for this problem. The computational results are presented for the instances from the literature, and compared to optimal solutions obtained by the CPLEX solver and heuristic solutions generated by the genetic algorithm. It can be seen that the proposed VNS approach reaches all optimal solutions in a quite short amount of computational time.* This research was partially supported by the Serbian Ministry of Science and Ecology under project 144007

The influence of induced mutagenesis on reproductive behavior of Drosophila subobscura and the role of sexual selection in relationto the level of mutational load

Prema teorijskim očekivanjima seksualna selekcija može smanjivati mutaciona opterećenja u populacijama. Mužjaci koji su boljeg genetičkog kvaliteta bi trebalo da budu uspešniji u parenju u poređenju sa mužjacima lošijeg genetičkog kvaliteta. Na taj način ženke, prilikom izbora partnera za parenje, mogu da eliminišu one mužjake koji nose štetne alele, i da smanje mogućnost prenošenja štetnih alela u sledeću generaciju. Seksualna selekcija će redukovati mutaciona opterećenja i povećavati adaptivnu vrednost populacije, ako je većina mutacija štetna i za adaptivnu vrednost i za osobine koje utiču na uspešnost mužjaka u parenju. Istraživanja poslednjih godina su dala rezultate koji idu u prilog ovoj teoriji, ali i oprečne rezultate. Ovakva kontradiktornost proizilazi iz kompleksnosti problematike usled različitih reproduktivnih strategija vrsta, kao i različitih reproduktivnih strategija mužjaka i ženki. Takođe, osobine koje utiču na komponente adaptivne vrednosti, kao i na uspešnost u parenju, su veoma složene, pod determinacijom velikog broja gena, i u čijoj osnovi leže kompleksne genske interakcije. Iako se kao osobine koje su cilj seksualne selekcije najčešće analiziraju sekundarne polne karakteristike, i mnoge druge osobine određuju atraktivnost mužjaka. To su i morfološke, fiziološke, ponašajne i druge osobine koje utiču na uspešnost u parenju, a mogu se nazvati osobinama koje su zavisne od opšteg stanja mužjaka (eng. condition-dependent traits)...According to theoretical predictions sexual selection can reduce mutational load in populations. Males of good genetic quality should be more successful in matings, compared to the males of low genetic quality. In this way females, through the choice of mating partners, can eliminate males carriers of deleterious alleles, and reduce transmission of deleterious alleles to the next generation. Sexual selection will purge mutational load and increase fitness if most mutations were deleterious to both nonsexual fitness and condition-dependent traits affecting mating success. Studies in recent years have yielded results that support this theory, but opposite results are obtained, as well. This contradiction arises from different reproductive strategies of species, and different reproductive strategies of males and females. Traits that affect fitness components, as well as mating success, are under polygenic determination, with very complex gene interactions. Although secondary sexual traits were usually analyzed as target of sexual selection, many other traits can determine male attractiveness. Traits such as morphological, physiological, behavior and other, affecting mating success, can be termed as condition-dependent traits. In order to test this hypothesis, that sexual selection can reduce mutational load, two experimental groups were formed from the same population genetic pool of Drosophila subobscura, which differed in the level of mutational load. Mutations were induced in one group, using 30Gy ionizing radiation. The effect of sexual selection in reduction of mutational load was measured through different components of male mating behavior (courtship occurrence, courtship latency, courtship intensity, mating occurrence,latency to mating and duration of mating)...

The influence of induced mutagenesis on reproductive behavior of Drosophila subobscura and the role of sexual selection in relationto the level of mutational load

Prema teorijskim očekivanjima seksualna selekcija može smanjivati mutaciona opterećenja u populacijama. Mužjaci koji su boljeg genetičkog kvaliteta bi trebalo da budu uspešniji u parenju u poređenju sa mužjacima lošijeg genetičkog kvaliteta. Na taj način ženke, prilikom izbora partnera za parenje, mogu da eliminišu one mužjake koji nose štetne alele, i da smanje mogućnost prenošenja štetnih alela u sledeću generaciju. Seksualna selekcija će redukovati mutaciona opterećenja i povećavati adaptivnu vrednost populacije, ako je većina mutacija štetna i za adaptivnu vrednost i za osobine koje utiču na uspešnost mužjaka u parenju. Istraživanja poslednjih godina su dala rezultate koji idu u prilog ovoj teoriji, ali i oprečne rezultate. Ovakva kontradiktornost proizilazi iz kompleksnosti problematike usled različitih reproduktivnih strategija vrsta, kao i različitih reproduktivnih strategija mužjaka i ženki. Takođe, osobine koje utiču na komponente adaptivne vrednosti, kao i na uspešnost u parenju, su veoma složene, pod determinacijom velikog broja gena, i u čijoj osnovi leže kompleksne genske interakcije. Iako se kao osobine koje su cilj seksualne selekcije najčešće analiziraju sekundarne polne karakteristike, i mnoge druge osobine određuju atraktivnost mužjaka. To su i morfološke, fiziološke, ponašajne i druge osobine koje utiču na uspešnost u parenju, a mogu se nazvati osobinama koje su zavisne od opšteg stanja mužjaka (eng. condition-dependent traits)...According to theoretical predictions sexual selection can reduce mutational load in populations. Males of good genetic quality should be more successful in matings, compared to the males of low genetic quality. In this way females, through the choice of mating partners, can eliminate males carriers of deleterious alleles, and reduce transmission of deleterious alleles to the next generation. Sexual selection will purge mutational load and increase fitness if most mutations were deleterious to both nonsexual fitness and condition-dependent traits affecting mating success. Studies in recent years have yielded results that support this theory, but opposite results are obtained, as well. This contradiction arises from different reproductive strategies of species, and different reproductive strategies of males and females. Traits that affect fitness components, as well as mating success, are under polygenic determination, with very complex gene interactions. Although secondary sexual traits were usually analyzed as target of sexual selection, many other traits can determine male attractiveness. Traits such as morphological, physiological, behavior and other, affecting mating success, can be termed as condition-dependent traits. In order to test this hypothesis, that sexual selection can reduce mutational load, two experimental groups were formed from the same population genetic pool of Drosophila subobscura, which differed in the level of mutational load. Mutations were induced in one group, using 30Gy ionizing radiation. The effect of sexual selection in reduction of mutational load was measured through different components of male mating behavior (courtship occurrence, courtship latency, courtship intensity, mating occurrence,latency to mating and duration of mating)...

Intelligent textiles and sports clothing

Special purpose fibers were found only in the middle of the last century and since then the possibility of their application has been studied. These fibers are used in the production of clothing that requires specific protective functions such as: protection against fi re and heat, ballistic protection, protection against various types of radiation, protection against nuclear, biological and chemical effects, sportswear etc...The new generation of textiles, intelligent textiles, no longer serves only as protection, but it can receive and recognize stimuli from the environment and respond to them

Are we going the same way? American and European perspectives in fighting corruption

U ovom radu autori ispituju različite načine sprječavanja i borbe protiv korupcije u nekoliko pravnih sustava. Također daju informacije o međunarodnim instrumentima s kojima su usklađene unutarnje politike i zakonodavstva država. Razmatrajući dva velika pravna sustava Europsku uniju i SAD, autori daju uvid u dva načina borbe protiv korupcije. Premda ne postoji određena razlika u zakonodavnom pristupu Europske unije s jedne strane i SAD-a i Kanade s druge strane, postoje razlike u praksi. Razlike su na operativnom i institucionalnom nivou, ali ne i u javnim politikama. Posebna je pozornost u ovome članku poklonjena pravnim osobama kao nositeljima kaznene odgovornosti što je posljedica različitih teoretskih pristupa prihvaćenih u određenim sustavima pod kojima se pravna osoba smatra kazneno odgovornom. Dok je u SAD-u vrlo lako proglasiti pravnu osobu kazneno odgovornom, u Velikoj Britaniji, Kanadi i nekim drugim zemljama Europske unije to je povezano s određivanjem odgovorne osobe na višim razinama u strukturi pravnih osoba

Effect of irrigation regime and application of kaolin on yield, quality and water use efficiency of tomato

Modern agriculture is faced with two tasks: (1) to produce enough food for a growing global population, and (2) to ensure satisfactory crop quality while using water resources efficiently. A study of the effect of kaolin on the yield, quality and water use efficiency of tomato (Lycopersicon esculentum Mill.), grown under different irrigation regimes, is reported in the paper. The research was conducted in an open field with carbonate chernozem soil, at Stara Pazova (40 km north of Belgrade, Serbia). It lasted for three years (2011, 2012, and 2013). The experimental setup was a two-factorial, completely random block system, with three replications. The first factor was the irrigation regime and the second the application of kaolin. Two irrigation treatments were studied: (a) full irrigation (F), covering 100% of ETc (crop evapotranspiration), and (b) deficit irrigation (D) at 50% of ETc. The kaolin treatments were: (a) control treatment, without kaolin (C) and treatment with a 5% suspension of kaolin (K). On average, the highest fresh tomato fruit yields were achieved under full irrigation, with kaolin (FK) (21.0 kg m(-2)). The FK treatment also resulted in the greatest dry weight of the fruits (1.1 kg m(-2)). The average fruit weight was rather uniform and ranged from 71.7 g with DC to 75.4 g with DK. The average sugar and lycopene content was quite uniform over the study period, while the irrigation regime had a significant effect on the average organic acid content and total antioxidant activity. Deficit irrigation treatments resulted in a higher organic acid content and higher total antioxidant activity than full irrigation. The application of kaolin had a greater effect of the water use efficiency of tomato than the irrigation treatment.This is the peer-reviewed version of Djurović, N., Ćosić, M., Stričević, R., Savić, S.,& Domazet, M.. (2016). Effect of irrigation regime and application of kaolin on yield, quality and water use efficiency of tomato. in Scientia Horticulturae Elsevier, Amsterdam., 201, 271-278. [https://doi.org/10.1016/j.scienta.2016.02.017 conv_5711