ORIGINAL_ARTICLE
PARTICLE SWARM-AIDED DESIGN OF A FUZZY LOGIC STABILIZER FOR A SUPERCONDUCTING GENERATOR IN A MULTI-MACHLNE POWER SYSTEM
The application of a fuzzy logic stabilizer to enhance the stability of a superconducting generator (SCG) in a multi-machine power system is described. The proposed fuzzy stabilizer uses SCG speed deviation and acceleration as input signals; The stabilizer parameters set includes the scaling factors for input and output variables, as well as the overlap ratios of neighboring fuzzy membership functions of input variables. Particle swarm optimization (PSO) technique is employed lo search for optimal settings of the fuzzy stabilizer parameters. Simulation results show that the proposed, PSO-tuned fuzzy stabilizer provides good damping to SCG in a multi-machine environment when operating in conjunction with conventional stabilizers on other machines.
https://erjm.journals.ekb.eg/article_69509_e499f7e5a9d79a3971149ebe48646dee.pdf
2009-10-01
403
410
10.21608/erjm.2009.69509
Ragaey A. F.
Saleh
1
Department of Electrical Engineering, Faculty of Engineering, Minoufiya University, Shebin El-Kom, Egypt
AUTHOR
ORIGINAL_ARTICLE
MEASURING THE NETWORK RELIABILITY OF THE DEVICE PLACEMENT LOCATION BETWEEN TWO TERMTNALS BY USING CUT-SET METHOD
The Device Placement Location (DPL) is concerned with locating the placemeat of the corresponding electronic device within certain existing user locations.. It considers. the cost parameter of the device placement location and routing users. This paper measures the reliability of the DPL and assigning the users to the DPL by implementing the DPLRC & DPLRC algorithms. In fact, our models ire similar in spirit to [26]. However, there is a striking difference between them In this paper, the users are assigned to .the.device locations only after measuring the network reliahility. The DPLRC algorithm is applied to minimize the cost of placing the devices and maximize the reliability of users that are assigned to the device locations. The DPLRD algorithm is used to maximiie the reliability of placing the devices and the demands of the users that are assigned to device locations. We have used the Hao-Orlin algorithm to measure the network reliahility. 'It is implemented to run this algorithm in 0 (nm log (nZ/m)) time. All the three algorithms mentioned above have been analyzed and designed by the use of UML. They are implemented by the use of C#.NET 2005 programming language. We discuss the relationship between the nodes, edges, and the effectiveness of the cost on the increase in the DPLs with the aid of tradeoff curves and tables. We also look at the performance of the algorithms by measuring the CPU time taken to find the DPLs. The results of this paper demonstrates that the number of the DPLs and the users assigned vary according to the total number of nodes, edges and the minimum cost thresholds.
https://erjm.journals.ekb.eg/article_69515_6538169b72c2b3633c434ad5cb82e633.pdf
2009-10-01
411
417
10.21608/erjm.2009.69515
The network reliability
he location problهm
The facility location and the device placement location
Farhat M.
Alfakhari
1
Department of Computer Science Al-Tahaddi University -LIBYA
AUTHOR
Abdu Alsalam
Ambarek
2
Department of Electrical and Electronic Engineering Garyounis University - LIBYA
AUTHOR
ORIGINAL_ARTICLE
HARDWARE IMPLEMENTATION OF MODIFIED ECG WITH POWER LINE NOISE CANCELLATION
The electrocardiogram is generally used clinically in diagnosing the heart diseases. Hence, it must be very accurate. Signals recorded are often contaminated with Power Lime 50 Hz noise and harmonics originating from power supplies, power mains and lights. The presence of noise cormpts the information content of these signals and can degrade the quality of subsequent data analysis. This electrical interference is notoriously difficult to remove without altering the original signal imbedded within the noise. The power line interference reduction in ECG records is a challenging problem which is still open for research. The power line signal, measured directly &om the transmission lie may have amplitude, phase and frequency variations. This paper deals with designing 50 Hz Twin-T notch filter for elimmating the power line noise from ECG signa
https://erjm.journals.ekb.eg/article_69519_10980869ad2854535ee1a276e98f2f20.pdf
2009-10-01
419
427
10.21608/erjm.2009.69519
Electrocardiogram
Power Line noise
50 Hz Twin-T notch filter
Ahrned A,
Mobarka
1
Electronics Research Institute (Em, Power Electronics & Energy Conversion Department, National Research Centre, Cairo, Egypt
AUTHOR
Attia E.
Azzam
2
Electrical Engineering Department, Faculty of Engineering - Minoufiya University
AUTHOR
M.
Alaam
3
Electrical Power and Machines Department, Faculty of Engineering Tanta University, Egypt
AUTHOR
ORIGINAL_ARTICLE
A NOVEL SYSTEM FOR PHOTOVOLTAIC SOLAR CELL TEST AND CHARACTERISTIC MEASUREMENTS
This paper describes a proposed system for testing and characteristics measurement of photovoltaic (PV) solar cells, module andlor array. The measurements are made using data acquisition system designed and implemented in the laboratory to facilitate the measuring and monitoring of the PV cells characteristics. The functioning of the software is based on the socalled virtual instrumentation. This is a non-conventional data acquisition system. The proposed system can be implemented at significantly lower cost than the commercial one. The dark characteristics test facility, based on LabVIEW software to design an easy handling Graphical User Interface (GUI) and use a single chip microcontroller with a serial interface as a data logger. The system is used to acquire the measured data from the cell under test and transfer it to a supervisory computer for monitoring and other signal processing. The system also allows the user to save the collected data for documentation. The preliminary test we have made indicates that the system proposed here is highly reliable, which allows measuring and monitoring variety of solar cell, module andlor array characteristics with a good accuracy. So it can be used in trusted manner for evaluating and documenting the PV systems.
https://erjm.journals.ekb.eg/article_69522_7bb3501efee0afd2662c27b89b0b8084.pdf
2009-10-01
429
435
10.21608/erjm.2009.69522
solar cells
Photovoltaic
PV characteristics measurement
I-V Curve Tracer
LabVIEW
PC-Microcontroller interfacing
Yousry
Atia
1
Electronics Research Institute, PV Cells Dept, El-Tahrir St., Dokki, 12311-Giza, Egypt
AUTHOR
Mohamed
Zahran
2
Electronics Research Institute, PV Cells Dept, El-Tahrir St., Dokki, 12311-Giza, Egypt
AUTHOR
ORIGINAL_ARTICLE
PHOTOVOLTAIC MAXIMUM POWER POINT TRACKING USING SEPIC CONVERTER
In this paper a maximum power point hacking (MPPT) system based on the single ended primary inductor converter (SEPIC) and hill-climbimg approach is introduced. 'SEPIC converter is a comprehensive buck-boost converter and has minimum ripple content in the input current that suitable for PV application. The proposed MPPT system is designed and components of SEPIC converter are sized and selected. The conholler is so fast and no fluctuation around the MPP is introduced. A current and voltage of the PV array are sensed and a pulse width modulation (PWM) signal is produced from the controller to conhol the duty ratio of the converter. The simulation results show that three tests are carried out on the system; a suddenly insolation level increasing, decreasing, and load resistance variation. The controller establishes robustness for all the three cases and the maximum power available fiom the PV array are transferred to the load irrespective of load or environmental condition variations.
https://erjm.journals.ekb.eg/article_69528_c16d411d7312a6d8671f8ea36e3fc62d.pdf
2009-10-01
437
445
10.21608/erjm.2009.69528
Maximum Power Point Tracking
SEPIC Converter
DCDC Converter
Yousry
Atia
1
Electronics Research Institute; PV Cells Dept, El-Tahrir St., Do&, 12311-Giza, Egvpt
AUTHOR
ORIGINAL_ARTICLE
PERFORMANCE MANAGEMENT OF AN INTEGRATED WIND TURBINE-FUEL CELLMICRO TURBINE HYBRID SYSTEM
This paper concerns with the management of the dynamic performance of a wind turbine integrated with a fuel cell/micro turbine hybrid system for continuous power supply. The objective is to mitigate some problems associated with the intermittent nature of wind energy and to ensure a continuous power supply to the load. The strategy is based on maximizing the power extracted from the wind, where the excess of power is utilized to generate hydrogen through a water electrolyser. This hydrogen is then used for supplying the fuel cell, which. drives a downstream micro-turbine. The fuel-cell/micro-turbine hybrid unit is used to provide the deficit power when the wind power is not enough to meet the load demand. At the same time, it is used to smooth the oscillatory perhmance of the wind power. This configuration gives more flexibility since the generated power fiom the fuel cell and micro turbine can be controlled individually. Detailed models for the wind power source and the hybrid fuel celllmicro turbine system are presented. Extensive simulation results are introduced to ascertain the feasibility and reliability of the proposed management approach.
https://erjm.journals.ekb.eg/article_69531_35aa793067eebe6b42df5f56a7c58c0c.pdf
2009-10-01
447
454
10.21608/erjm.2009.69531
Fuel cell
management system
Micro turbine
renewable energy
Wind turbine
ORIGINAL_ARTICLE
PARAMETRIC STUDY OF RETENTATE RE-PROCESSING RO DESALINATION UNITS
In this paper several arrangements of two-module feed forward reverse osmosis (RO) systems were investigated. The membrane module was modeled as a tube side feed flow tubular module. A superstructure that incorporates all possible arrangements for two-module feed fomard RO systems was developed. This superstructure isused to develop the general mathematical model for the RO system which can be used to s&ulate any of the module arrangements. Mass materials and energy balances have been applied to each component ii~ the systems. The suggested model has been constructed and solved numerically to obtain a better understanding of characteristics and behavior of modules arrangement. This paper also aims to investigate how external forces such as feed specifications, utility and product costs affect the performance and optimal design of RO systems. The effect of the following parameters on unit performance is investigated such as; feed specifications (flow rate and concentration), operating conditions (feed pressure and temperature) and Membrane dimensions (length and diameter).
https://erjm.journals.ekb.eg/article_69534_3f597d63a4586bff05d55797336492b9.pdf
2009-10-01
455
473
10.21608/erjm.2009.69534
Desalination
Reverse osmosis (RO)
mathematical model
Operating Conditions
Membrane Module
K. A.
Ibrahim
1
Mechanical Power Engineering Department, Faculty of Engineering, Minou$ya University Shebin El-Kom, Egypt
AUTHOR
ORIGINAL_ARTICLE
EFFECT OF OPERATING CONDITIONS ON WALL CONCENTRATION OF RO SYSTEMS
Desalination using reverse osmosis membranes has become very popular for producing fresh water from brackish and sea water. Concentration polarization occurs in any pressure driven membrane separation process. It describes an increase in the concentration at the membrane wall due to the rejection of ionic species transported there by the convective flux. Accurate prediction of concentration polarization (CP) phenomenon is critical for properly designing reverse osmosis GO) processes because it enhances transmembrane osmotic pressure and solute passage, as well as surface fouling and scaling phenomena. Membrane life time and permeate flux, however, are primarily affected by the phenomena of concentration polarization and fouling at the membrane surface. This paper aims to investigate the effect of the following parameters on concentration polarization phenomenon such as; feed specifications (flow rate and concentration), operating conditions (feed pressure and temperature) and Membrane dimensions (length and diameter).
https://erjm.journals.ekb.eg/article_69551_e9c798bd9cab3d1338ee087ad2c61114.pdf
2009-10-01
475
488
10.21608/erjm.2009.69551
Reverse osmosis
Two-module
Operating Condition
Concentration polarization
Tubular Module
E. H
Kotb
1
Mechanical Power Engineering Department, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt.
AUTHOR
K. A.
Ibrahim
2
Mechanical Power Engineering Department, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt.
AUTHOR
E. H.
Amer
3
Mechanical Power Engineering Department, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt.
AUTHOR
ORIGINAL_ARTICLE
COMBUSTION OF KEROSENE SPRAYS
The combustion of the kerosene sprays inside a swirl type combustor is studied. To decrease the exhaust emissions such as NOx, NO and S02, Natural Gas (NG) or Liquefjed Petroleum Gas (LPG) fuels are added to the combustion air with different ratios. The effects of different percentages of NG (10, 20, 30 and 40%), different percentages of LPG (1, 2, 3 and 4%), and thermal load (70, 100 and 130 kW) on the flame characteristics were investigated. Also, a comparison between addition of NG and LPG was carried out. During the experimental study, the air to fuel mass ratio and air swirl number are kept constants at 30 and 0.5, respectively. The experimental results show that, as the NG percentage increases from 10 to 40%, the flame lengths and the flame temperatures were decreased, so that, NOx, NO, C02 and SOz concentrations were decreased, while CO and O2 concentrations were increased. Also, as the LPG percentage increases, the flame lengths and the flame temperatures were decreased, so that, NOx and NO, COz and SO2 concentrations were decreased, while COand O2 concentrations were decreased.
https://erjm.journals.ekb.eg/article_69539_f48a5cf2f645751bcd7f0f9563cda941.pdf
2009-10-01
489
498
10.21608/erjm.2009.69539
Gas turbine
Spray Combustion
Emissions
Swirling
A. K
Abd El-Samed
1
-
AUTHOR
H. M
Gad
2
-
AUTHOR
S. E
Habik
3
-
AUTHOR
T. M.
Farag
4
-
AUTHOR
ORIGINAL_ARTICLE
GEOMETRICAL EFFECTS OF THE ATOMIZER SPIN CHAMBER AND AIR SWIRLER ON FLAME CHARACTERISTICS
Both of the fuel and combustion air streams were co-swirled to create a strong and stable flame. The effects of cbanging the geometry of atomizer spin chamber and combustion air swirler on flame characteristics were experimentally investigated. The diameter and depth of the spin chamber also the hub diameter and vanes angle of the combustion air swkler were changed in turn. The experimental runs were carried out witbin a horizontal water-cooled combustor tube of 32 cm diameter and 150 cm length. Kerosene spray was issued at 12.5 bar with constant flow rate of 12.6 kghr keeping the airlfuel ratio constant at 19. Gas temperature distributions, sectional average gas temperatures along the combustor, flame stability limits and overall heat transfer to the combustor wall were determined for the different operating runs.
https://erjm.journals.ekb.eg/article_69541_eaeb89f4447700c70fb356e8881ef40d.pdf
2009-10-01
499
509
10.21608/erjm.2009.69541
Fuel Spin Chamber
Air Swirl Number
Hub diameter ratio
Spray Combustion
Aly Kamel
Abd El-Samed
1
Mechanical Power Engineering,Department, Faculty of Engineering, Suez Canal University, Port-Said, Egypt
AUTHOR
ORIGINAL_ARTICLE
THE EFFECT OF SOLID-LIQUID MIXTURE ON CAVITATION CHARACTERISTICS OF A CENTRIFUGAL PUMP
The objective of the present study is to present new experimental results of the effect of solids on the cavitation inception of centrifugal pump under varying suction conditions. The experiments were conducted using sand slurry with different solids size at different concentration and different pump speed. Measurements of power consumption, flow rate, total head developed by the pump were made in order to obtain the effect of solids on the cavitation characteristics of centrifugal pumps handling slurries. The results show that the cavitation inception has been accelerated with increasing solid concentration, and pump speed while the particle size has little effect on cavitation inception.
https://erjm.journals.ekb.eg/article_69546_bcb597eff94abcb1886581761137ceb3.pdf
2009-10-01
511
520
10.21608/erjm.2009.69546
Centrifugal Pump
Suction conditions
Solids concentration
Cavitation inception
S. M.
selim
1
Department of Mechanical Engineering, Faculty of Engineering, Shebin El-Kom Minoufiya University, Egypt.
AUTHOR
M. A.
El-kadi
2
Department of Mechanical Engineering, Faculty of Engineering, Shebin El-Kom Minoufiya University, Egypt
AUTHOR
M. A.
Hosien
3
Department of Mechanical Engineering, Faculty of Engineering, Shebin El-Kom Minoufiya University, Egypt
AUTHOR
M. A.
Younes
4
Mechanical and Elect~iccal Research Institute (MERI), National Water Research Center (NWRC), Delta Barrage, Egypt.
AUTHOR
I. R
Teaima
5
Mechanical and Elect~iccal Research Institute (MERI), National Water Research Center (NWRC), Delta Barrage, Egypt.
AUTHOR
ORIGINAL_ARTICLE
CREEP FAILURE TIME OF THIN-WALLED PIPES UNDER COMBINED TORSION, BENDING AND TENSION
The creep failure time is calculated for rectilinear thim-walled pipes subjected to torsion as well as tension and bending. The calculating of the failure time is given using the concept of equivalents stresses. The equivalent stresses are found from the mixed delayed-failure criterion relating the maximum normal stress and the intensity of tangent stresses. Results for failure time which are made of steel alloys are presented and compared with the results obtained by Golub et al. (2004) [3]. The present work can be used to calculate the time to creep failure for any thin-walled pipes under torsion, axial load and bending.
https://erjm.journals.ekb.eg/article_69484_dc0ca3e18a91fe8eed0a40dfeeecee77.pdf
2009-10-01
521
528
10.21608/erjm.2009.69484
creep failure
plane bending
thin-walled pipe
torsion
uniaxial tension
A.
El Megharbel
1
Suez Canal University, Faculty of Engineering, Production Engineering and Mechanical Design Department, Port Said 42523, Egypt
AUTHOR
ORIGINAL_ARTICLE
MECHANICAL PROPERTIES AND WELDING POWER OF FRICTION STIRRED AA2024-T35 JOINTS
This study is concerned with the effect of fiction stir welding parameters on the mechanical properties and the consumed welding power for AA2024-T35 joints. AA2024-T35 was friction stir welded at different welding speeds (16, 40 and 80 mmlmin), rotation speed (900, 1120 and 1400 rpm) and two tool pmfiles (triangular and square). The welding power was measured and evaluated with two previously established models [1,2]. The tool profile as well as the welding speed showed significant effect on the microstructure especially at lower welding speeds. The increase of the welding speed improves the mechanical properties for both tool profiles whereas it has an insignificant effect on the welding power. The square profile produced better mechanical properties and consumed more power, at 40 mmlmin, than the triangular one. Also, the welding speed showed a weak effect on the welding power, hut the need of power increased with the increase of the rotation speed. The measured power was found to he in agreement with the computed one through a theoretical work established by Heurtier et al.
https://erjm.journals.ekb.eg/article_69485_51bbd62fbb91ebbac22cebc63082dad9.pdf
2009-10-01
529
537
10.21608/erjm.2009.69485
Friction Stir Welding
Welding speed
Rotation speed
Welding power
AA22024-T35
H. Abd
El-Hafez
1
Suez Canaf University, Faculty of Engineering, 42523 Port Said, Egypt
AUTHOR
ORIGINAL_ARTICLE
A COMPREHENSIVE REVIEW AND CATEGORIZATION OF STOREHOUSE PROBLEMS
In this article an extensive review and categorization of storehouse problems is presented. The storehouse problems are viewed in a new way. This view classified the storehouse problems into three categories. These categories are order picking and routing methods for order pickers, order batching and batch construction, and product allocation and layout of order picking area. The fust category is relevant to bow the orders picking and routes are designed in the aim of minimizing the distance traveled to provide the customer's orders at the promised dates of ordered quantity. Second category is relevant to grouping orders into batches that are picked in a single tour and of a targeted objective of reducing the mean travel time per order. The third category is concerned with inventory management and storage location assignment in order to satisfy the customer's orders in an appropriate delivery date. The survey exhibits that the cited categories are tackled in different importance weights. The paper presents the main tools used as solver techniques for the considered categories.
https://erjm.journals.ekb.eg/article_69486_bf687070c283f9ecdb2da2ec75ae9865.pdf
2009-10-01
539
549
10.21608/erjm.2009.69486
Routing methods
Order picking
Order batching
Product allocation
Amer A
Boushaala
1
Department of Industrial and kfanufacturing Systems Engineering University of Gaiyounis -LIBYA
AUTHOR
Tarak A.
Housein
2
Department of Industrial and kfanufacturing Systems Engineering University of Gaiyounis -LIBYA
AUTHOR
ORIGINAL_ARTICLE
STRESS ANALYSIS OF FGM FOR I-SECTION BEAMS
A theoretical analysis for functionally gradient materials (FGMs) of I-section beams is introduced in the present study. Analytical methods are set in the form of equations, in order to provide a method for predicting the normal stress distribution of the FGMs beam under axial load and bending moment; using the effective principal axes. Considering the elastic modulus to be a power function, the effect of the non-homogeneity parameter on the distribution of the normal stress, as well as on the position of the neutral axis along the beam height, is discussed. The results obtained show that the non-homogeneity parameter has a great effect on the normal stress distribution and on the position of the neutral axis
https://erjm.journals.ekb.eg/article_69487_f490f72b4a062650a7d6fec50c05b5d2.pdf
2009-10-01
551
557
10.21608/erjm.2009.69487
Bending moment
Functionally gradient materials
I-Section beam
Neutral axis
Normal stress
A.
El Megharbe
1
Suez Canal University, Faculty of Engineering, Production Engineering and Mechanical Design Department, Port Said 42523, Egypt
AUTHOR
H. Abd
El-Hafez
2
Suez Canal University, Faculty of Engineering, Production Engineering and Mechanical Design Department, Port Said 42523, Egypt
AUTHOR
ORIGINAL_ARTICLE
A NEW SOIL COMPACTOR FOR INCREASING WATER HOLDING CAPACITY OF LOAMY SAND SOIL
Because the most soils in Saudi Arabia can not maintain water being sandy soils. This. soil characteristic leads to the loss of water by gravity. In addition, the high degree of temperature also can cause high evaporation rate for water after irrigation especially in summer. A thought was developed toward a method to increase soil bulk density that leads to raise the capability of water to maintain water. This was achieved by designing and constructing a machine for compacting and making holes in soil. These holes will act as small water tanks in soil and save water to growing seeds. This machine consisted of 44 cm diameter cylinder with 245 cm width to make 8 rows of holes on the ground with 30 cm apart. The cylinder bas 5 groups of metal cones (10 cm diameter with 10 cm height) welded on the cylinder circumference. Thus, lay out holes on the ground have a distance of 30 cm apart and 40 cm apart in the other direction. Mainly two field treatments were camed out, one with holes and one without holes. Variables such as soil moisture content and soil bulk density of soil were measured at different depths and times. The other variables such soil penetration resistance and organic matter as well as the clay percent were determined affer the 4" inigation for both treatments. The results showed that soil moisture content was higher in hole soil treatment than soil without treatment due to the coUection of clay particles and organic matter by water droplets during inigation. The collection of clay and organic matter in these holes made the holes very well sealed and increased the soil storage for water. It is obvious that the developed machine decreased the soil hydraulic conductivity that leads to an increase in soil water content.
https://erjm.journals.ekb.eg/article_69488_7097c4b9c5f837d37c0f1cba31662831.pdf
2009-10-01
559
566
10.21608/erjm.2009.69488
Khiery M.
Ismail
1
Dept. of AgriculturaL EngiNeering, FaculTy of Agriculture, University of Alexandria, Egypt
AUTHOR
I. S.
Al-salama
2
dept. of Civil Engineering, Faculty of Engineering, Qassim University. Saudi Arabia.
AUTHOR
ORIGINAL_ARTICLE
ASSESSING THE VARIABILITY OF INFLOWS AT ASWAN HIGH DAM DUE TO OUTFLOW CHANGES FROM VICTORIA LAKE RESULTING FROM CLIMATE CHANGE
In this research the Nile Decision Support System (NILE-DST) was tooled to assess the variability of the inflows at Aswan High Dam (AHD) due to the outflow changes from Victoria Lake resulting fiom climate changes and the increase in water demands. Different scenarios were established where the outflow fiom Victoria Lake was decreased by 3,10,18,25,37,55,75 and 100%. The scenarios considered a time span of 63 years (1913-1976) in which a natural flow period (19 13- l976), a dry period (1920-1960) and a wet period (1961-1976) were distinguished. The model was run and results of inflows at the different river nodes (i.e. Victoria Lake, Packwash, Mogalla, Sudd Exit, Malakal, Gab1 El-Aulia, Dongola and AHD) and the properties of the reservoirs (i.e. storage capacity, water level and evaporation)] were obtained. These results were analyzed and plotted. Fmm these plots the impact of the variability in the outflow fiom Victoria on the AKD was assessed. On the other hand, an adaptive solution (constructing a diversion canal "Jonglie Canal" to by-pass the swamps in order to decrease the evaporation losses) was proposed in order to compensate for the inflow reduction at AHD. As a concluszon from this research, it was found that the AHD will be considerably affected by the variability of the outflows fiom Victoria Lake. It was also found that Jonglie Canal would serve as a compensator.
https://erjm.journals.ekb.eg/article_69493_d099458c049eaeeb2ad31ebcf01550df.pdf
2009-10-01
567
576
10.21608/erjm.2009.69493
Nile Decision Support System
Aswan High Dam
Victoria Lake
Jonglie Canal
Sherien
Zahran
1
-
AUTHOR
ORIGINAL_ARTICLE
A NEW MODEL FOR HIGHWAY CONSTRUCTION SITE LAYOUT PROBLEM USING A HYBRID OPTIMIZATION APPROACH
Undoubtedly, site layout is a veiy important planning problem for the construction of any project. A new approach to solve the multi-objective construction site layout (MCSL) problem is presented. It is based on the combination of Genetic Algorithm (GA) and the TOPSIS technique. MCSL is considered with assigning of predetermined facilities into a number of predetermined places. The proposed approach has two main objectives. The fust is to minimize overall distance, while the second is to reduce the number of crossing paths between diierent facilities. Also, the approach has two characteristic features. Firstly, a new chromosome's structure is introduced, which is adopted as it is capable to representing all possible feasible solutions. Secondly, the algorithm is an iterative multi-objective genetic algorithm with an external population of Pareto optimal solutions that best conform a Pareto front. To help the decision makers to extract the best compromise solution from a fmite set of alternatives, a TOPSIS (Technique for Order Performance by Similarity to Ideal Solution) method is adopted. A case study for a simple highway project is presented to illustrate the application of the proposed model
https://erjm.journals.ekb.eg/article_69497_106a48b32427abeac52e8020394b09f7.pdf
2009-10-01
577
584
10.21608/erjm.2009.69497
Ibrahim
hashim
1
Civil Engineering Department, Faculty of Engineering, Menoufiya University
AUTHOR
Hassan I.
Mathkour
2
Department of Computer Science,College of Computer and Information Sciences, King Saud University, Saudia Arabia
AUTHOR
A.A.
Mousa
3
Basic Engineering Sciences Department, Faculty of Engineering, Menoufiya University
AUTHOR
ORIGINAL_ARTICLE
الاضاءة کنظام تقني لتحقيق افضل مستوي رؤية داخل المبني الاداري
Lighting is one of the most important regulations affecting the performance withim the administrative buildings. Contributing to the psychological stability of the human person in his work and times of comfort, as well as its contribution to the preservation of human health and safety. So, when lighting make a good vision it will increase work and decreasing mistakes.
https://erjm.journals.ekb.eg/article_69505_f04ba2217f84cf25e257bfdae58ecbca.pdf
2009-10-01
585
592
10.21608/erjm.2009.69505
Waleed. A.
Afifi
1
Egyptian Railways Maintenance and Services Company
AUTHOR