ORIGINAL_ARTICLE
Incorporated Poly Acrylic Acid-co-Fe3O4 Nanoparticles Mixed Matrix Polyethersulfone based Nanofiltration Membrane in Desalination Process
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.
https://www.ije.ir/article_72952_c2a156931f612f0ca46394a7893b24ea.pdf
2017-06-01
821
829
Nanofiltration
Hydrophilicity
Nanocomposite filler
permeability flux/salt rejection
Pore Size
Ehsan
Bagheripour
e-bagheripour@araku.ac.ir
1
Chemical Engineering, Arak University
AUTHOR
Abdolreza
Moghadassi
a-moghadassi@araku.ac.ir
2
Chemical Engineering, Arak University
AUTHOR
Sayed Mohsen
Hosseini
sm-hosseini@araku.ac.ir
3
Chemical Engineering, Arak University
AUTHOR
ORIGINAL_ARTICLE
Effective Design of a 3×4 Two Dimensional Distributed Amplifier Based on Gate Line Considerations
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).
https://www.ije.ir/article_72953_ff5af86f177a0bbfa019f83f5a01c753.pdf
2017-06-01
830
838
Distributed Amplifier
Two Dimensional Distributed Amplifier
Electrical Funnel
Power Combining
AmirHamze
Mogheyse
a.h.mogheyseh@stu.nit.ac.ir
1
Electrical and Computer Engineering, Babol Noushirvani University of Technology
AUTHOR
H.
MiarNaimi
h_miare@nit.ac.ir
2
Computer & Electrical Engineering, Babol Noshiravani University of Technology
AUTHOR
ORIGINAL_ARTICLE
Embedded Memory Test Strategies and Repair
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.
https://www.ije.ir/article_72954_a73cde9a6b82efcdf2022dd5ad23a0bf.pdf
2017-06-01
839
845
Embedded memory
self
testing
Memory built
in self
repair (MBISR)
System on chip (SoC)
Memory test algorithm
yield improvement
Abdul Sattar
Syed
syedabdulsattar1965@gmail.com
1
, Royal Institute of Technology & Science
AUTHOR
D.Elizabeth
Rani
2
, GITAM Institute of Technology, GITAM University
AUTHOR
Mohammed Altaf
Ahmed
altaface1@gmail.com
3
Eletronic and Communication Engineering, GITAM Institute of Technology, GITAM University
AUTHOR
ORIGINAL_ARTICLE
Simulation and Modeling of a High Sensitivity Micro-electro-mechanical Systems Capacitive Pressure Sensor with Small Size and Clamped Square Diaphragm
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
https://www.ije.ir/article_72955_fbbc027db5d6f95084e566b6401da80d.pdf
2017-06-01
846
850
BioMEMS
Capacitive pressure sensor
Small size
High sensitivity
Mechanical coupling
yadollah
Hezarjaribi
y.hezarjaribi@gu.ac.ir
1
Electrical Engineering, Golestan university
AUTHOR
mahdieh
yari esbouei
mahdieh.yari@gmail.com
2
Electrical Engineering, Golestan university
AUTHOR
bahram
Azizollah Ganji
bagangi@nit.ac.ir
3
Electrical Engineering, Babol university
AUTHOR
ORIGINAL_ARTICLE
A Novel Generalized Topology for Multi-level Inverter with Switched Series-parallel DC Sources (RESEARCH NOTE)
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.
https://www.ije.ir/article_72956_0c25b4e06ab93d83bcbd1eca21c9b3c6.pdf
2017-06-01
851
858
multi
Level Inverter
Series
Parallel switches
Isolated DC Sources
Phase disposition (PD) PWM
G
Sridhar
gaddamsridhar78@gmail.com
1
electrical and electronics engineering, jyothishmathi institute of technology and science
AUTHOR
ORIGINAL_ARTICLE
Bertrand-nash Equilibrium in the Retail Duopoly Model under Asymmetric Costs
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.
https://www.ije.ir/article_72957_7daaed7dfac3fdb8850c1d6b4d39f685.pdf
2017-06-01
859
866
EOQ model
retail duopoly model
Bertrand equilibrium
market potential
bifurcation parameter
return on logistics costs
barrier to entry
Serhij
Melnikov
nfn333@ukr.net
1
Economics and Management, Odessa National Maritime University
AUTHOR
ORIGINAL_ARTICLE
Sustainable Supplier Selection by a New Hybrid Support Vector-model based on the Cuckoo Optimization Algorithm
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).
https://www.ije.ir/article_72958_e596ec556c238f79fb667921c29c5dd7.pdf
2017-06-01
867
875
Computational intelligence
Sustainable supplier selection
least square
support vector machine (LS
SVM)
Cuckoo Optimization Algorithm
Nazanin
Foroozesh
n.foroozesh@ut.ac.ir
1
Industerial Engineering, University of Tehran
AUTHOR
R.
Tavakkoli-Moghaddam
2
, University of Tehran
AUTHOR
ORIGINAL_ARTICLE
Bi-objectives Approach for a Multi-period Two Echelons Perishable Product Inventory-routing Problem with Production and Lateral Transshipment
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.
https://www.ije.ir/article_72959_e2185a93210620a8e2a9f6653ab5230e.pdf
2017-06-01
876
886
Production inventory routing problem
IRP
mixed integer
programming
perishable
Non
dominant sorting genetic algorithm
Parviz
Fattahi
fattahi@basu.ac.ir
1
Industrial Engineering, Bu-Ali Sina University
AUTHOR
Mahdi
Bashiri
bashiri.m@gmail.com
2
Industrial Engineering, Shahed University
AUTHOR
mehdi
tanhatalab
me.tanhatalab@gmail.com
3
Industrial Engineering, Bu-Ali Sina University
AUTHOR
ORIGINAL_ARTICLE
Numerical Survey of Vibrational Model for Third Aircraft based on HR Suspension System Actuator Using Two Bee Algorithm Objective Functions
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.
https://www.ije.ir/article_72960_2d477f262c465060c7cb89917527f0d0.pdf
2017-06-01
887
894
airplane model
PID approach
Multiobjective Optimization
semiactive vibration absorber
Artificial Bee Colony
Behrooz
Attaran
attaranbehrooz@yahoo.com
1
mechanical engineering, shahid chamran university
AUTHOR
Milad
Zarchi
m.zarchi@srttu.edu
2
Mechanical Engineering Department, Shahid Rajaee Teacher Training University
AUTHOR
A.R.
Toloei
toloei@sbu.ac.ir
3
Department of Aerospace Engineering, Shahid Beheshti University
AUTHOR
ORIGINAL_ARTICLE
Multi-objective Optimization of Stirling Heat Engine Using Gray Wolf Optimization Algorithm (TECHNICAL NOTE)
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.
https://www.ije.ir/article_72961_7dfbd0e33a493a677189089250131a04.pdf
2017-06-01
895
903
Stirling Engine
power output
pressure loss
Thermal efficiency
Gray Wolf Optimizer
multi
objective optimization
linear programming technique
Hamed
Badjian
shahryarzare13@gmail.com
1
Electrical and Electronic Engineering, Shiraz University of Technology
AUTHOR
Shahryar
Zare
s.zare@sutech.ac.ir
2
Mechanical and Aerospace Engineering, Shiraz University of Technology
AUTHOR
Alireza
Tavakolpour-Saleh
tavakolpour@sutech.ac.ir
3
Mechanical and Aerospace Engineering, Shiraz University of Technology
AUTHOR
ORIGINAL_ARTICLE
Hydraulic Network Modeling to Analyze Stream Flow Effectiveness on Heat Transfer Performance of Shell and Tube Heat Exchangers
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.
https://www.ije.ir/article_72962_881bb483e6c061312234faa23f9c3c20.pdf
2017-06-01
904
911
SHELL
tube heat exchanger
Hydraulic networks
Stream flow
heat transfer coefficient (HTC)
Pressure drop
amir
asgari tahery
a.asgary@urmia.ac.ir
1
Mechanical Engineering, Urmia University
AUTHOR
Samad
Jafarmadar
jafarmadars@gmail.com
2
Mechanical Engineering, Urmia University
AUTHOR
S.
Khalil Arya
sh.khalilarya@urmia.ac.ir
3
Mechainical Engineering, Urmia University
AUTHOR
ORIGINAL_ARTICLE
Differential Flatness Method Based on Pre-set Guidance and Control Subsystem Design for a Surface to Surface Flying Vehicle (TECHNICAL NOTE)
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.
https://www.ije.ir/article_72963_c3cf8696914b8a330e5cb915218401ce.pdf
2017-06-01
912
919
Nonlinear systems
Flat differential technique
Preset guidance
Flatness Based Controller
Jalal
karimi
jalalkarimi1570@yahoo.com
1
Space Research Institute, Malek Ashtar University of Technology
AUTHOR
Reza
Esmaelzadeh
esmaelzadeh@aut.ac.ir
2
Space Research Institute, Malek Ashtar University of Technology
AUTHOR
Mohammad Reza
Taheri
aerospace.taheri@yahoo.com
3
Space Research Institute, Malek Ashtar University of Technology
AUTHOR
ORIGINAL_ARTICLE
Investigation of the Forming Force in Torsion Extrusion Process of Aluminum Alloy 1050
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.
https://www.ije.ir/article_72964_1f8b20977517ec584287e3b7347254f3.pdf
2017-06-01
920
925
Torsion Extrusion
Maximum Punch Force
Finite element simulation
Taguchi method
Vali
Alimirzaloo
v.alimirzaloo@urmia.ac.ir
1
Mechanical Engineering, Urmia university
AUTHOR
Vahid
Modanloo
v.modanloo@urmia.ac.ir
2
Mechanical Engineering, Urmia university
AUTHOR