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Open Access Article
1 - Determining approximate efficient solutions of multiobjective optimization problems using the combined constrained scalarization method
Mehrdad Ghaznavi Fereshteh Akbari Esmaile KhorramIn this paper, approximate efficient ( -efficient) solutions of multiobjective optimization problems are investigated. One of the most important methods for solving multiobjective optimization problems is to use scalarization techniques. In these methods, a single objec MoreIn this paper, approximate efficient ( -efficient) solutions of multiobjective optimization problems are investigated. One of the most important methods for solving multiobjective optimization problems is to use scalarization techniques. In these methods, a single objective optimization problem corresponding to the multiobjective problem is solved, and the relationship between optimal solutions of the single objective problem and (weakly, properly) efficient solutions of the multiobjective problem is investigated. In this paper, a combination of the modified constrained and elastic constrained scalarization methods is considered, which will provide necessary and sufficient conditions for generating approximate (weakly, properly) efficient solutions. We compare the results with the necessary and sufficient conditions obtained from the modified constrained and the elastic constrained methods. The presented results can be applied for every multiobjective optimization problem without any convexity assumption for the objective functions. ‎Unlike many of the previous methods, the obtained results are also consistent with multiobjective problems with unbounded criterion space. Manuscript profile -
Open Access Article
2 - Non-smooth Optimality for Robust Multi-objective Optimization Problems
Maryam Saadati Morteza OveisihaThis article is concerned with non-smooth/nonconvex robust multi-objective optimization problems involving uncertain inequality and equality constraints. Employing some advanced tools of variational analysis such as the approximate extremal principle and the weak fuzzy MoreThis article is concerned with non-smooth/nonconvex robust multi-objective optimization problems involving uncertain inequality and equality constraints. Employing some advanced tools of variational analysis such as the approximate extremal principle and the weak fuzzy sum rule for the Frechet subdifferential, we first drive a fuzzy necessary optimality condition of a non-smooth/nonconvex multi-objective optimization problem without any constrained qualification in the sense of the Frechet subdifferential. Then by exploiting the obtained fuzzy optimality condition, the non-smooth version of Fermat’s rule and formulae for the limiting subdifferential of an infinite family of non-smooth functions, we establish a necessary optimality condition in terms of the limiting subdifferential for weakly robust efficient solutions of the reference problem. Further,we present an example to illustrate this condition for an uncertain multi-objective optimization problem involving equality and inequality constraints.Finally sufficient conditions for weakly robust efficient solutions and robust efficient solutions of the problems are provided by presenting new concepts of generalized convexity. Manuscript profile -
Open Access Article
3 - Wolf-type duality for nonsmooth mathematical programs with equilibrium constraints
Ali Ansari ArdaliMathematical program with equilibrium constraints is one of the optimization problems whose constraints are used to model certain equilibria in the applications of engineering sciences and economics. Our main aim in the present paper is to investigate the necessary opti MoreMathematical program with equilibrium constraints is one of the optimization problems whose constraints are used to model certain equilibria in the applications of engineering sciences and economics. Our main aim in the present paper is to investigate the necessary optimality conditions and create a Wolfe type dual problem for such problems. To investigate these conditions, we consider non smooth and non convex optimization problem with equilibrium constraints and suppose that all functions are not necessarily differentiable or convex. For this optimization problem, using the notion of convexificator, which is viewed as a generalization of the idea of subdifferential, we remind some constraint qualifications, stationary conditions, and generalized convexity. Finally, weak duality theorem and strong duality theorem are established under appropriate generalized convexity assumptions and a constraint qualification for an optimization problem with equilibrium constraints based on the notion of convexificators. We also illustrate some of our results by an example. Manuscript profile -
Open Access Article
4 - Modeling the Factors Affecting Supply Chain Optimization in the Electricity Industry: a Combined Approach to Interpretive Structural Analysis
Mojtaba Omidiyan Younos Vakil Alroaia Seyyed Abdolla heydariyehThe purpose of this study was interpretive structural modeling of the factors affecting supply chain optimization in the electricity industry. In this study, using a mixed method, a qualitative-quantitative approach was employed to model and verify the factors affecting MoreThe purpose of this study was interpretive structural modeling of the factors affecting supply chain optimization in the electricity industry. In this study, using a mixed method, a qualitative-quantitative approach was employed to model and verify the factors affecting supply chain optimization. To this end, through content analysis and thematic analysis using Novo software to form thematic networks, a qualitative model of factors influencing supply chain optimality was designed. In order to formulate a basic pattern of the factors affecting supply chain optimality, 23 experts in the electricity industry were selected through purposeful sampling method. In the quantitative section of the study, interpretive structural modeling (ISM) approach and MICMAC analysis were used. The results showed that the initial framework of supply chain optimality model has six dimensions including supply chain performance, supply chain management, supply chain risk management, supply chain quality management, production and operation, and supply chain stability. In the ISM graph, the variables were categorized at different levels, in which the "agency" and "strategy" factors were the highest and "customer satisfaction" was the lowest factor. After MICMAC analysis, the variables were categorized in three groups of independent variables with 11 variables, with four variables and dependent variables with 10 variables. No variables were included in the PA. Manuscript profile -
Open Access Article
5 - Economic Theory of Optimal Marriage
vahid mehrbaniEconomic approach to the marriage represent that optimal conditions in family formation are realized whenever the man loves equally himself and his wife and so the household resources will be equally distributed. Accordingly, the purpose of this paper is to consider the MoreEconomic approach to the marriage represent that optimal conditions in family formation are realized whenever the man loves equally himself and his wife and so the household resources will be equally distributed. Accordingly, the purpose of this paper is to consider the credibility of this idea and to find empirical evidence. By using a sample including of 415 married men residing in Tehran, empirical evidence suggest that higher income of women tends to convey marriage to optimality but the age and education of women go in opposite direction. In addition, the number of children and the degree of resemblance of couples' tastes will have positive impact on reaching to optimal marriage. At last, marriage will be close to optimality, if the men’s education is higher than the women’s occurred in lower ages and the number of children and the degree of understanding between the couples is more. The most important implication of this paper is that the similar characteristics of men and women are not necessarily a favorite situation in marriage but some discrepancies seem to be better. Manuscript profile -
Open Access Article
6 - Description and analysis of the consonant omission process in Bakhtiyari dialect based on the framework of optimality theory
Gholamhassan Oraki Elkhas vaysi Mansoore Shekaramiz Omission refers to the elision of a segment during the production of a speech sound. Deletion of a segment usually occurs in initial, medial, or final positions of a word. Complete deletion of a segment included a consonant or a vowel regarded as one of th More Omission refers to the elision of a segment during the production of a speech sound. Deletion of a segment usually occurs in initial, medial, or final positions of a word. Complete deletion of a segment included a consonant or a vowel regarded as one of the most common universal processes in phonology. Considering this fact, the present research aims at investigating the "deletion" process in Bakhtiyari dialect in Izeh. To get this end, the required data collected by field study via recording the sample data from speakers (age range between 60 to 70 years). Collected data were classified and transcribed. Descriptive –analytical method was used to analyze them within the theoretical framework of optimality. The results of our analysis showed dominating constraints on the optimal candidates during analyzing the process of segment deletion in Bakhtiyari dialect. In the process of omission, the optimal candidates selected in Bakhtiyari dialect by observing the "markedness constraints" and receiving the least penalization from the faithful limitation in the surface level. Thus, in this dialect, markedness constraints play the fundamental role in determining the optimal output dominates over the other constraints. Manuscript profile -
Open Access Article
7 - The Morph-Morphemic Processes and Final Consonant Ellison of Takestan Tati Clitics on the Basis of Optimality Theory
Javad Rahmani Mohammadreza Oroji Behzad RahbarThe present study was an attempt to investigate the morphological Clitics and Final Consonant Ellison in Takestan Tati dialect in the light of optimality theory. Morphological processes of phonological changes occur in a morphological contexts, those changes happened am MoreThe present study was an attempt to investigate the morphological Clitics and Final Consonant Ellison in Takestan Tati dialect in the light of optimality theory. Morphological processes of phonological changes occur in a morphological contexts, those changes happened among morphemes, and are phonologically governed. The research was analytical and the data were collected from Tati books and local media. This study probed into the application of the morphological processes in Takesteni Tati dialect Clitics and Final Consonant Ellison from optimality point of view. The results illustrated that in Tati both elision and insertion processes happened in morphological borders, highlighting conspiracy in this language. In other words, this study concluded that the global ranking restrictions also apply to Tati and the constraints in Tati dialect were in line with global ones. The present study could be added to the linguistic scope and knowledge of scholars, acquainting the researchers more with morphological processes of Tati dialect and its adaptation to the universalities of this realm. Manuscript profile -
Open Access Article
8 - A Comparison of phonological processing and Dezfuil dialect of Persian language in the framework of Optimality Theory
mohammad paknejad Elkhas Veisi The purpose of this paper is the description and analysis of the most frequent phonological processes in Dezfuli dialect as well as their use within the Optimality approach which is the new theory in phonology and it is also constraint–based approach, since More The purpose of this paper is the description and analysis of the most frequent phonological processes in Dezfuli dialect as well as their use within the Optimality approach which is the new theory in phonology and it is also constraint–based approach, since the research in the framework of optimality is analyzed, the present study was conducted with a choice of analytical method and to collect samples and data from field work and then collected the recorded fifteen hours conversations of normal speech of informants and participants have the average age between thirty to fifty–five years. In addition, one of the writers is a native speaker of this dialect. The present study utilizes discrete mechanisms respectively. After collecting this data, voice transcription and classification has been done. The most active processes in this dialect, the vowel conversion process, vowel harmony, eliminating assimilation are studied. According to the study, the maximum markedness optimal constraints in Dezfuli dialect are dominant. Compared to the standard Persian, faithfulness constraints dominated in the hierarchy restrictions on the rest of the samples. As well as the processes of elimination and assimilation are the most active than other processes in this dialect Manuscript profile -
Open Access Article
9 - A Description of Phonological processes in Golpayegani dialect in the framework of Optimality Theory
masoumeh dianatiThe present study aims to describe the most important phonological processes analytically in Golpayegani dialect in the framework of Optimality Theory. The standard Persian Language for this research is the one which is used by speakers in national mass media. But MoreThe present study aims to describe the most important phonological processes analytically in Golpayegani dialect in the framework of Optimality Theory. The standard Persian Language for this research is the one which is used by speakers in national mass media. But since there is variation in different villages and area, the focus of this research is on urban area of pronunciation. The data of this study were obtained from Golpayegani-native speakers' daily conversations by the author. The data analysis showed that weakening, vowel assimilation, vowel dissimilation and metathesis are the most frequent processes. Among different kinds of weakening, spirantization and approximation are also the most frequent in this accent. In the framework of Optimality Theory, markedness constraints are often responsible for optimal candidates. Manuscript profile -
Open Access Article
10 - Investigating weakening processes in Sistani dialect based on Optimality Procedure
Sayed Farid Khalifehloo Bahman Behrad Far Sadegh Eftekhary FarThe purpose of this study is to describe and to analyze some phonological processes of weakness based on optimality theory in the Sistani dialect. The method used in this research is descriptive and analytical one. For this purpose, 10 old, illiterate, male, and rural s MoreThe purpose of this study is to describe and to analyze some phonological processes of weakness based on optimality theory in the Sistani dialect. The method used in this research is descriptive and analytical one. For this purpose, 10 old, illiterate, male, and rural speakers were randomly selected and the linguistic data collected by using free speech recordings, available library resources, and their interviews. Then, the found data extracted from the recorded sentences and the data registered according to the international alphabet phonetic system. After that, phonological processes of weakening in the Sistani dialect were classified. In the next step, the constraints extracted based on optimality phonology. Finally, the limitations extracted from each phonological process were described and analyzed in special tables of optimality theory. Based on the analysis, it can be concluded that the phonological processes of weakening in the Sistani dialect can be analyzed based on optimality theory. This study showed that the most faithfulness constraints of weakening processes were violated in this dialect. There were anti-deletion constraint (MAX) and the similarity constraint of the features of place and manner of articulation IDENT (place & manner). Likewise, the presence of consonant clusters and the existence of the CODA in this dialect produces a marked structure. Finally, it can be concluded that there were markedness constraints that played a role in determining the optimal output and are ranked higher than the faithfulness constraints. Manuscript profile -
Open Access Article
11 - and /e/ to /u/“A Study on Shifting the Vowels /e/ to /i/ in Present tense and Imperative verbs initiating with the morpheme /be/ in Abadani dialect” Depending on Optimality theory”
elkhas veisi fateme derisKhuzestani or Jonubi dialect known as Abadani dialect is one of the well-known Iranian dialects to which less research are dedicated. To this end, the present study aims at investigating, the shifting of vowels /e/ to /i/ and /e/ to /u/ respectiv MoreKhuzestani or Jonubi dialect known as Abadani dialect is one of the well-known Iranian dialects to which less research are dedicated. To this end, the present study aims at investigating, the shifting of vowels /e/ to /i/ and /e/ to /u/ respectively, via the progressive assimilation in imperative verbs with present tense initiating with /be/ in Abadani dialect. These phonological shifts do not occur in all speech events. The analysis of the collected data carried out descriptively within the theoretical framework of Optimality. The optimality tables explain why these processes do not occur in all cases, using the faithfulness and markedness constraints. The results have shown that the first consonant of the neighboring syllable after the morpheme /be/, determines the happening or blocking of the above mentioned transformation. Manuscript profile
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