@article { author = {Bagheripour, Ehsan and Moghadassi, Abdolreza and Hosseini, Sayed Mohsen}, title = {Incorporated Poly Acrylic Acid-co-Fe3O4 Nanoparticles Mixed Matrix Polyethersulfone based Nanofiltration Membrane in Desalination Process}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {821-829}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {Polyethersulfone (PES) based nanocomposite nanofiltration membrane was prepared by immersion precipitation method and casting solution technique using  poly (acrylic acid) grafted-iron oxide nanoparticles (Fe3O4) as hydrophilic filler additives. For this purpose, iron oxide nanoparticles were modified by in situ polymerization of acrylic acid in aqueous solution by potassium persulfate as initiator and ethylene glycol as cross-linker. The grafted iron oxide nanoparticles were investigated by Fourier transforms infrared spectroscopy. The effect of different concentrations of grafted nanoparticles on the PES nanofiltration membrane performance and properties was investigated by scanning electron microscopy, water content, pure water flux, pore size, permeability flux, rejection and tensile strength. The water content was enhanced by incorporation of nanoparticles into the membrane matrix from 72.04 to 74.75%. It was observed that pure water flux (2.68 to 8.71 L/m2.h), mean pore size (2 to 6 nm) and permeability flux (0.8 to 4 L/m2.h) improved with loading of nanoparticles into the membrane matrix. The results revealed that utilization of grafted iron oxide nanoparticles in the membrane matrix led to improvement of rejection from 53.98 to 89.19% for membrane filled with 0.05% wt. nanoparticles. Also tensile strength increased slightly for sample 1 from 3874 to 4825 kPa for sample 4. Moreover, results showed more appreciation performance for the modified membrane containing PAA-Fe3O4 composite nanofillers compared to membrane filled with bare Fe3O4 nanoparticles.}, keywords = {Nanofiltration,Hydrophilicity,Nanocomposite filler,permeability flux/salt rejection,Pore Size}, url = {https://www.ije.ir/article_72952.html}, eprint = {https://www.ije.ir/article_72952_c2a156931f612f0ca46394a7893b24ea.pdf} } @article { author = {Mogheyse, AmirHamze and MiarNaimi, H.}, title = {Effective Design of a 3×4 Two Dimensional Distributed Amplifier Based on Gate Line Considerations}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {830-838}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {In this paper two dimensional wave propagation is used for power combining in drain nodes of a distributed amplifier (DA). The proposed two dimensional DA uses an electrical funnel to add the currents of drain nodes. The proposed structure is modified due to gate lines considerations. Total gain improvement is achieved by engineering the characteristic impedance of gate lines and also make appropriate variation in the output of gain cells. All variations are done with respect to input and output reflection loss considerations. Analytical expression for the gain of the proposed DA is presented and design considerations for electrical funnel are discussed. Based on two dimensional power combining a wide band DA is simulated using TSMC 0.18 CMOS model in ADS which consumes 49.42 mw from 1.2V power supply. Good agreement between the proposed DA gain and calculated value is achieved. Although one stage DA is used, the final results yield a high figure of merit (FOM) in 0.18 CMOS technology. The final design shows 11.1 dB gain from near DC to 23.6 GHz, noise figure between 3 to 5.2dB and maximum output power of 7.1dBm at 1-dB output compression point (OP1dB).}, keywords = {Distributed Amplifier,Two Dimensional Distributed Amplifier,Electrical Funnel,Power Combining}, url = {https://www.ije.ir/article_72953.html}, eprint = {https://www.ije.ir/article_72953_ff5af86f177a0bbfa019f83f5a01c753.pdf} } @article { author = {Syed, Abdul Sattar and Rani, D.Elizabeth and Ahmed, Mohammed Altaf}, title = {Embedded Memory Test Strategies and Repair}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {839-845}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {The demand of self-testing proportionally increases with memory size in System on Chip (SoC). SoC architecture normally occupies the majority of its area by memories. Due to increase in density of embedded memories, there is a need of self-testing mechanism in SoC design. Therefore, this research study focuses on this problem and introduces a smooth solution for self-testing.  In the proposed memory test algorithm, the self-testing as well as self-repair mechanisms are incorporated. This scheme repairs the detected faults and is easily integrated with SoC design. Here, an attempt has been made to implement the memory built-in-self-repair (MBISR) architecture to test and repair the faults from the embedded memories. It is little, and it supports at-fast test without timing penalty during its operation. The proposed method is a better alternative in speed and low area overhead. Thus, it plays a significant role in yield improvement.}, keywords = {Embedded memory,self,testing,Memory built,in self,repair (MBISR),System on chip (SoC),Memory test algorithm,yield improvement}, url = {https://www.ije.ir/article_72954.html}, eprint = {https://www.ije.ir/article_72954_a73cde9a6b82efcdf2022dd5ad23a0bf.pdf} } @article { author = {Hezarjaribi, yadollah and yari esbouei, mahdieh and Azizollah Ganji, bahram}, title = {Simulation and Modeling of a High Sensitivity Micro-electro-mechanical Systems Capacitive Pressure Sensor with Small Size and Clamped Square Diaphragm}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {846-850}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {This paper proposes a Micro-electro-mechanical (MEMS) capacitive pressure sensor that relies on the movable electrode displaced like a flat plate equal to the maximum center deflection of diaphragm. The diaphragm, movable electrode and mechanical coupling are made of polysilicon, gold and Si3N4, respectively. The fixed electrode is gold and the substrate is Pyrex glass. This proposed method increased the effective surface of capacitor and the displacement of movable electrode. The size of this sensor is 250×250 µm2 and the thickness of diaphragm is 1µm with 1 µm air gap. According to the results the sensitivity of sensor is 58.5}, keywords = {BioMEMS,Capacitive pressure sensor,Small size,High sensitivity,Mechanical coupling}, url = {https://www.ije.ir/article_72955.html}, eprint = {https://www.ije.ir/article_72955_fbbc027db5d6f95084e566b6401da80d.pdf} } @article { author = {Sridhar, G}, title = {A Novel Generalized Topology for Multi-level Inverter with Switched Series-parallel DC Sources (RESEARCH NOTE)}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {851-858}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {This paper presents a novel topology of single-phase multilevel inverter for low and high power applications. It consists of polarity (Level) generation circuit and H Bridge. The proposed topology can produce higher output voltage levels by connecting dc voltage sources   in series and parallel. The proposed topology utilizes minimum number of power electronic devices which helps in reduction of the cost, size, and weight. The proposed topology consumes low power therefore improves the efficiency of the converter. Switching pulses are generated using Phase disposition (PD) pulse width modulation technique. Finally the effectiveness of the proposed topology is verified using MATLAB/SIMULINK software tool. 7level asymmetrical multilevel inverter prototype hardware is prepared to support the proposed topology to verify the effectiveness and its validity.}, keywords = {multi,Level Inverter,Series,Parallel switches,Isolated DC Sources,Phase disposition (PD) PWM}, url = {https://www.ije.ir/article_72956.html}, eprint = {https://www.ije.ir/article_72956_0c25b4e06ab93d83bcbd1eca21c9b3c6.pdf} } @article { author = {Melnikov, Serhij}, title = {Bertrand-nash Equilibrium in the Retail Duopoly Model under Asymmetric Costs}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {859-866}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {In this paper, the Bertrand's price competition in the retail duopoly with asymmetric costs is analyzed. Retailers sell substitute products in the framework of the classical economic order quantity (EOQ) model with linear demand function. The market potential and competitor price are considered to be the bifurcation parameters of retailers. Levels of the barriers to market penetration depending on the bifurcation parameters are analyzed. The conditions of Bertrand-Nash equilibrium in parametric and trigonometric forms are found.}, keywords = {EOQ model,retail duopoly model,Bertrand equilibrium,market potential,bifurcation parameter,return on logistics costs,barrier to entry}, url = {https://www.ije.ir/article_72957.html}, eprint = {https://www.ije.ir/article_72957_7daaed7dfac3fdb8850c1d6b4d39f685.pdf} } @article { author = {Foroozesh, Nazanin and Tavakkoli-Moghaddam, R.}, title = {Sustainable Supplier Selection by a New Hybrid Support Vector-model based on the Cuckoo Optimization Algorithm}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {867-875}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {For assessing and selecting sustainable suppliers, this study considers a triple-bottom-line approach, including profit, people and planet, and regards business operations, environmental effects along with social responsibilities of the suppliers. Diverse metrics are acquainted with measure execution in these three issues. This study builds up a new hybrid intelligent model, namely COA-LS-SVM, for taking performance variations of the sustainable suppliers quantified by the performance index. The presented artificial intelligent (AI) model is introduced in light of a new combination of least squares-support vector machine (LS-SVM) and cuckoo optimization algorithm (COA). The LS-SVM is used in regards to the mapping capacity amongst performance index and its causative input criteria. The COA is presented to advance LS-SVM tuning parameters. In this exploration, an illustrative database comprising of 80 historical cases is gathered to set up the presented intelligence system. In the light of experimental results, the presented COA-LS-SVM can effectively illustrate performance index’s variances since it has accomplished relatively low statistical metrics. Therefore, the proposed hybrid AI framework can be a promising approach to help the supply chain decision-makers in sustainable supply chain management (SSCM).}, keywords = {Computational intelligence,Sustainable supplier selection,least square,support vector machine (LS,SVM),Cuckoo Optimization Algorithm}, url = {https://www.ije.ir/article_72958.html}, eprint = {https://www.ije.ir/article_72958_e596ec556c238f79fb667921c29c5dd7.pdf} } @article { author = {Fattahi, Parviz and Bashiri, Mahdi and tanhatalab, mehdi}, title = {Bi-objectives Approach for a Multi-period Two Echelons Perishable Product Inventory-routing Problem with Production and Lateral Transshipment}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {876-886}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {In this study, a two echelons supply chain system in which a supplier is producing perishable product and distribute it to multiple customers is considered. By allowing lateral transshipment mechanism, it is also possible to deliver products to some customers in some periods in bulk, then customers using their own vehicle to transship goods between each other seeking further reduction in the overall cost. The aim here is minimizing the production, inventory carrying cost, and distribution as the first objective, and transshipment cost as the second objective, which is contrary objectives, without facing any shortage anywhere in the chain during the planning horizon. This problem is formulated as a bi-objectives mixed integer programming (BOMIP), and then a proper Pareto front as a set of multiple decision alternatives is provided using NSGAII and NRGA approach. Novelty of this research is providing a bi-objectives mathematical modeling of perishable product inventory routing with production and transshipment (BO-P-PIRPT) that help the decision maker to choose the best mixture of routing and transshipment.}, keywords = {Production inventory routing problem,IRP,mixed integer,programming,perishable,Non,dominant sorting genetic algorithm}, url = {https://www.ije.ir/article_72959.html}, eprint = {https://www.ije.ir/article_72959_e2185a93210620a8e2a9f6653ab5230e.pdf} } @article { author = {Attaran, Behrooz and Zarchi, Milad and Toloei, A.R.}, title = {Numerical Survey of Vibrational Model for Third Aircraft based on HR Suspension System Actuator Using Two Bee Algorithm Objective Functions}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {887-894}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {This research explains airplane model with two vertical vibrations for airframe and landing gear system. The purpose of this work is to advance vibrational model for study of adjustable vibration absorber and to plan Proportional-Integration-Derivative approach for adapting semi active control force. The coefficients of this method are modified as stated by Bee multiobjective optimization using minimizing accelerations and impact forces as objective functions. The consequences implies that the semi active shock absorber system based on artificial Bee colony improves passengers and ride comfort and fatigue life of fuselage, shock strut and tyre by reducing movement of body, suspension system and impact load in an important way compared to passive performance during touchdown phase with various sink speeds and runway surfaces for robustness and sensitivity investigation of optimization performance.}, keywords = {airplane model,PID approach,Multiobjective Optimization,semiactive vibration absorber,Artificial Bee Colony}, url = {https://www.ije.ir/article_72960.html}, eprint = {https://www.ije.ir/article_72960_2d477f262c465060c7cb89917527f0d0.pdf} } @article { author = {Badjian, Hamed and Zare, Shahryar and Tavakolpour-Saleh, Alireza}, title = {Multi-objective Optimization of Stirling Heat Engine Using Gray Wolf Optimization Algorithm (TECHNICAL NOTE)}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {895-903}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {The use of meta-heuristic optimization methods have become quite generic in the past two decades. This paper provides a theoretical investigation to find optimum design parameters of the Stirling heat engines using a recently presented nature-inspired method namely the gray wolf optimization (GWO). This algorithm is utilized for the maximization of the output power/thermal efficiency as well as minimization of the pressure loss. The linear programming technique is employed for analyzing the multi-objective problem and the result is compared with the three individually computed costs of the aforementioned cost functions. The results show that the new meta-heuristic algorithm (i.e. GWO) yields acceptable results in quality compared to the other presented methods such as TOPSIS and Bellman-Zadeh.}, keywords = {Stirling Engine,power output,pressure loss,Thermal efficiency,Gray Wolf Optimizer,multi,objective optimization,linear programming technique}, url = {https://www.ije.ir/article_72961.html}, eprint = {https://www.ije.ir/article_72961_7dfbd0e33a493a677189089250131a04.pdf} } @article { author = {asgari tahery, amir and Jafarmadar, Samad and Khalil Arya, S.}, title = {Hydraulic Network Modeling to Analyze Stream Flow Effectiveness on Heat Transfer Performance of Shell and Tube Heat Exchangers}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {904-911}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {In this article, stream flow effectivness is based on hydraulic network studied in the shell-side of a shell and tube heat exchange as a case study. For an appropriate heat exchangers rating design to meet a specified duty, it's better to consider each stream flow separately. Using the hydraulic network principals, a set of the correlations for calculating different stream flow rates in the cross and window area, leakage from tube-bundle and shell-baffle bypass are suggested. By the presented correlations, the actual flow direction and different stream flow rates of shell-side fluid for calculating of shell-side heat transfer and pressure drop in different regions between adjacent baffles has been taken into account. Also, the effects of each stream flow in each baffle section on the overall heat transfer coefficient (HTC) and pressure drop could be investigated. The comparison results of using these correlations and results of published values, like Bell-Delaware method and Kern correlations, is reasonable, which can be used in the optimum design of shell and tube heat exchangers with segmental baffles. Also, according to the results, the cross flow stream show much better heat transfer performance with lower pressure drop behavior than window stream at the same mass flow rates. Average heat transfer performance of window-section is almost 7-12% of overall heat transfer performance for studied case study.}, keywords = {SHELL,tube heat exchanger,Hydraulic networks,Stream flow,heat transfer coefficient (HTC),Pressure drop}, url = {https://www.ije.ir/article_72962.html}, eprint = {https://www.ije.ir/article_72962_881bb483e6c061312234faa23f9c3c20.pdf} } @article { author = {karimi, Jalal and Esmaelzadeh, Reza and Taheri, Mohammad Reza}, title = {Differential Flatness Method Based on Pre-set Guidance and Control Subsystem Design for a Surface to Surface Flying Vehicle (TECHNICAL NOTE)}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {912-919}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {The purpose of this paper is to design a guidance and control system and evaluate the performance of a sample surface‑to‑surface flying object based on preset guidance with a new prospective. In this study, the main presented idea is usage of unique property of governor differential equations in order to design and develop a controlled system. Thereupon a set of system output variables have been examined by specific tests as candidate of flattened variables. It is proved that the dynamism of the studying system has a property of differential flatness. This property as a basement for observing all of the system dynamic variables could be a perfect option to remove lack of observability of nonlinear systems. According to the information gained in the procedure of flatness demonstrating, there was a similarity between the control command generating in feedback linearization and flat systems tests. This similarity led to the application of the flat systems technique for the mentioned control method. The guidance and control system suggested in this paper is able to follow a set of specific reference trajectories in order to target different ranges. This ability without recalculating controller gains could be done only by having the rate of rotate of flying object in middle phase of maneuver. To validate the proposed FBC for the studied problem, another usual control method has been investigated. For this purpose, the linear quadratic regulator as straight forward control method in optimal control field has been applied. This feature reveals full compatibility between controller block and reference trajectory generator block.}, keywords = {Nonlinear systems,Flat differential technique,Preset guidance,Flatness Based Controller}, url = {https://www.ije.ir/article_72963.html}, eprint = {https://www.ije.ir/article_72963_c3cf8696914b8a330e5cb915218401ce.pdf} } @article { author = {Alimirzaloo, Vali and Modanloo, Vahid}, title = {Investigation of the Forming Force in Torsion Extrusion Process of Aluminum Alloy 1050}, journal = {International Journal of Engineering}, volume = {30}, number = {6}, pages = {920-925}, year = {2017}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {In this paper, torsion extrusion (TE) process on 1050 aluminum alloy was investigated by simulation as a severe plastic deformation (SPD) method and the effects of friction coefficient, angular velocity of the rotating die and punch speed on maximum punch force were studied. A finite element (FE) model was developed to simulate the TE process via DEFORM software. The FE results were validated compared with experimental results and then the FE model was used for implementing the set of simulations designed by Taguchi’s L9 orthogonal array. Maximum punch force was determined and put into signal to noise (S/N) ratio and the analysis of variance (ANOVA) techniques to specify the importance and contribution of parameters. The results indicated that the friction coefficient has the most effect on maximum punch force and effects of the angular velocity and punch speed are not sensible. Results analysis represented that maximum punch force enhances by increasing the friction coefficient. Moreover, friction coefficient of 0.18, angular velocity of 0.11 rad/s and punch speed of 0.2 mm/s lead to the minimum punch force.}, keywords = {Torsion Extrusion,Maximum Punch Force,Finite element simulation,Taguchi method}, url = {https://www.ije.ir/article_72964.html}, eprint = {https://www.ije.ir/article_72964_1f8b20977517ec584287e3b7347254f3.pdf} }