m. fadaee

One of the effective activities in organization’s supply chain management is the design of an efficient and functional chain network structure that plays a critical and significant role in the achievement of organizations. The increase in environmental considerations and social rules necessitates the organizations to consider such sustainability concerns in designing their supply chains while setting the economic objectives. This study aimed at designing a mathematical programming/planning model by taking into account the sustainability criteria in closed-loop supply chain of dairy industries. The most important sustainability indexes were extracted in three economic, environmental and social aspects and the most effective indexes were initially selected by using DEMATEL technique. Then, a multi-objective mixed integrated planning model was presented for designing the sustainable supply chain, the objectives of which included the indexes obtained from DEMATEL. In the next stage, the model was solved in a metric L-P method by using GAMS software. Thus, a set of optimal Pareto solutions were obtained. Finally, the resultant model was implemented in Isfahan’s Pegah Dairy Industries Company in 2019, resulting in seven optimal Pareto solutions. Based on the solutions obtained, the lowest cost, the lowest consumption rate of water and the lowest consumption rate of energy were found to be about 70 million IR rials, 760 m3 and 963 MWs per month, respectively; and the highest employment opportunities was found to be 39,000 men-hours per month.

Increasing the buckling strength-to-weight ratio is of particular importance in aerospace, mechanical, nuclear, and civil engineering. Corrugated structures with trapezoidal geometric pattern have higher amount of the buckling strength-to-weight ratio with respect to other similar structures; hence, these generations of structures are widely used in several industries. Static stability of corrugated cylindrical structures with trapezoidal geometric pattern was investigated here under axial loading for simply supported boundary condition. Using rst-order shear deformation theory of Mindlin, equilibrium equations of the problem were derived. Mechanical proper ties of corrugated cylindrical structure were achieved by the mechanical properties of equivalent orthotropic circular cylinder. Then, critical buckling load was obtained for both simple circular and corrugated cylinders. The present analytical results are validated by the nite element models. These validations report very good agreement between the present results and those obtained by the nite element analysis. Eect of dierent parameters including number of corrugations, cylinder thickness, cylinder length, cylinder radius, corrugation angle, and shape factor was investigated numerically on buckling behavior of corrugated cylindrical structure. The results of nite element reveal that buckling mode shapes can be divided into two types as local and global buckling modes. Graphical shapes of local and global modes are presented to make the better physical sense. In this article, the present analytical method can solve the global buckling problem of a corrugated cylinder. According to the comparison between present modeling results and those obtained by nite element analysis, increasing the corrugation angle and cylinder radius and decreasing the number of corrugations, the cylinder thickness, the cylinder length, and shape factor led to an increase in the buckling load of corrugated cylinder with respect to circular cylinder on the condition that local buckling had not been occurred. The present results and procedure can help engineers and designers to achieve a best performance for their structures, especially related to aerospace structures.

This study aimed to prioritize the Factors Affecting Financial Resources in Bank Mehr-e-Eghtesad Isfahan using the analytic hierarchy process (AHP) was performed. The study’s sample involved 13 executives & staff managers of Bank Mehr-e-Eghtesad of Isfahan that were selected by purposive sampling.To gather information from paired comparisons questionnaire was used. Validity of the questionnaires from masters and professionals and experts was assessed positively. Reliability of questionnaire based on the Inconsistency rate were calculated. To test the hypothesis using AHP Approach and Expert Choice software was used. The results showed that the central bank policy criteria, has largest share and the legal limitations criteria, has the lowest share in decision-making. The interest rate paid on deposits, according to all indicators, as the most influential factor on the mobilization of bank resources and service quality as the low- influential factor.