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28,188 Article Results

Insights on Extent of Effectiveness, Trend, and Gap in Existing Frameworks for e-Procurement System

10.11591/ijece.v6i2.pp751-758
N Madhusudan , L. Manjunatha Rao
With the advancement of technologies, the organization and business applications are witnessed with the increasing trends to adopt cut edge technologies to normalize their business process.  However, this trend was not observed much on the e-Procurement system, where the existing users still place the purchase order using conventional web-based approach that cannot address various ongoing challenges in eProcurement system. This paper attempts to review the existing trends and challenges of web-based eProcurement system and discusses that with the adoption of cloud computing as present trend, such ongoing issues of eProcurement can be addressed. The paper discusses the effectiveness of the existing techniques with interpretation of research gap.
Volume: 6
Issue: 2
Page: 751-758
Publish at: 2016-04-01

Exascale Message Passing Interface based Program Deadlock Detection

10.11591/ijece.v6i2.pp887-894
Raed AlDhubhani , Fathy Eassa , Faisal Saeed
Deadlock detection is one of the main issues of software testing in High Performance Computing (HPC) and also inexascale computing areas in the near future. Developing and testing programs for machines which have millions of cores is not an easy task. HPC program consists of thousands (or millions) of parallel processes which need to communicate with each other in the runtime. Message Passing Interface (MPI) is a standard library which provides this communication capability and it is frequently used in the HPC. Exascale programs are expected to be developed using MPI standard library. For parallel programs, deadlock is one of the expected problems. In this paper, we discuss the deadlock detection for exascale MPI-based programs where the scalability and efficiency are critical issues. The proposed method detects and flags the processes and communication operations which are potential to cause deadlocks in a scalable and efficient manner. MPI benchmark programs were used to test the proposed method.
Volume: 6
Issue: 2
Page: 887-894
Publish at: 2016-04-01

High Performance Control of Grid Connected Cascaded H-Bridge Active Rectifier Based on Type II-Fuzzy Logic Controller with Low Frequency Modulation Technique

10.11591/ijece.v6i2.pp484-494
M. Dabbaghjamanesh , A. Moeini , M. Ashkaboosi , P. Khazaei , K. Mirzapalangi
This paper tries to employ a fuzzy logic (FL) controller type II to control the Cascaded H-Bridge (CHB) active rectifier. This controller has strong performance, specially, when a low switching frequency Selective Harmonic Elimination (SHE) method is used. In order to regulate all of the DC link voltages, the optimum voltage balancing strategy in the low frequency modulation technique is used in the proposed method. Finally, the performance and effectiveness of the proposed method is validated in MATLAB environment.   All the simulation and result has been simulated by MATLAB software.
Volume: 6
Issue: 2
Page: 484-494
Publish at: 2016-04-01

Bridgeless Isolated Cuk PFC Implementation using PID and Neural Controller

10.11591/ijeecs.v2.i1.pp88-95
R. Pireethi , R. Balamurugan
 The comparision of Bridgeless  Isolated Cuk converter using Proportional  Integral  Derivative (PID) and Neural controller (NC) is presented in this paper. Due to Diode Bridge Rectifier (DBR) conventional converters suffer from high conduction loss. Bridgeless Cuk converter is used  to eliminate the issues. Bridgeless   Isolated (BLI)  Cuk  converter is used to withstand high voltage. Compare to Continuous Conduction Mode (CCM) Discontinuous Conduction Mode (DCM) utilize less number of sensors. To obtain unity power factor it is used to  work in  DCM mode. BLI Cuk Converter is implemented in  two controller PID and  Neural controller to observe  power factor. Performance of BLDC motor  is simulated  by using MATLAB/SIMULINK software. 
Volume: 2
Issue: 1
Page: 88-95
Publish at: 2016-04-01

An Effective Development and Analysis of a Mobile Robot

10.11591/ijece.v6i2.pp654-665
Jagannath Sahu , B.B. Choudhury , M.R. Patra
This paper deals with the design of a battery operated Mobile Robot and development of various modes of its control. The Mobile Robot can be operated in three different modes, namely Dual Tone Multi Frequency (DTMF), Radio Frequency (RF) and ZigBee thereby enabling a multi- dimensional control system. The Mobile Robot is a single seated carrier. It can also be used to transport substantial amount of physical load for short distances. It is a prototype of a multi-use robot having a wide range of applicability according to the requirement after suitable modifications. Thus it can be easily applied inside a hospital to carry patients, as a wheel chair for physically challenged people, to carry goods in large shopping malls, as golf cars, can also be used for industrial purposes with adequate modifications. It can also be used as cleaning machine at railway stations, airports, museums, large halls. It uses a DC power source and not any conventional energy sources. Hence it is ecofriendly and this Mobile Robot can be termed as an advancing step in the field of battery operated vehicles.
Volume: 6
Issue: 2
Page: 654-665
Publish at: 2016-04-01

An Extender Kalman Filter-based Induction Machines Faults Detection

10.11591/ijece.v6i2.pp535-548
Abdelghani Chahmi , Mokhtar Bendjebbar , Bertrand Raison , Mohamed Benbouzid
This paper deals with the detection and localization of electrical drives faults, especially those containing induction machines. First, the context of the study is presented and an Extended Kalman Filter is described for induction machines fault detection. Then the modeling procedure under faulty conditions is shown, and the machine diagnosis methods are developed. The proposed diagnosis approach requires only little experimental data, and more importantly it provides efficient simulation tools that allow characterizing faulty behavior.Fault detection uses signal processing techniques in known operating phases (fixed speed), considering and locating malfunctions.
Volume: 6
Issue: 2
Page: 535-548
Publish at: 2016-04-01

Novel ROADM modelling with WSS and OBS to Improve Routing Performance in Optical Network

10.11591/ijece.v6i2.pp700-707
Kavitha G.R G.R. , Indumathi T.S.
The area of optical network is on constant point of focus among the research communities owing to potential advantage of long distance communication as well as the routing issues associated with it. Majority of the implemented techniques calls for using expensive hardware or adopting narrowed technical assumptions, for which reason the routing performance couldn’t be optimized to a large extent. The present manuscript proposes a novel technique called as Optimized Routing for Peak Traffic under the scenario of uncertainties in the existing traffic scenario. The proposed solution presents some potential principle that is incorporated in the ROADM design for enhancing the capabilities of the proposed system.  The system is evaluated under multiple scenarios of analysis using blocking probabilities, OSNR, bit error rate, iteration etc. The outcome of the proposed system is compared with the one of the existing significant study to benchmark it.
Volume: 6
Issue: 2
Page: 700-707
Publish at: 2016-04-01

Partial Discharge Characterization based on Leakage Current Pulses Waveform for Contaminated Glass Insulator String

10.11591/ijece.v6i2.pp835-843
N. A. Othman , M. A. M. Piah , Z. Adzis , Nasir A. Al-geelani
This paper deals with the analysis of partial discharge (PD) occurrences based on leakage current (LC) pulses distribution under different level of contamination. In this work, laboratory based contamination performance tests are conducted on four units of glass insulator string stacked in I-position. Results show that PD can be characterized (according to their occurrence with respect to the AC supply) as follows: corona discharge occurring dominantly in lightly contaminated insulators, surface discharge occurring dominantly in medium contaminated insulators and finally internal discharge occurring dominantly in heavily contaminated insulators. The ability to distinguish the type of PDs from the LC waveform could be used to monitor and predict the condition of the insulator. The outcome can be incorporated in a conditioning monitoring system.
Volume: 6
Issue: 2
Page: 835-843
Publish at: 2016-04-01

Information Retrieval: Textual Indexing Using an Oriented Object Database

10.11591/ijeecs.v2.i1.pp205-214
Mohammed Erritali
The growth in the volume of text data such as books and articles in libraries for centuries has imposed to establish effective mechanisms to locate them. Early techniques such as abstraction, indexing and the use of classification categories have marked the birth of a new field of research called "Information Retrieval". Information Retrieval (IR) can be defined as the task of defining models and systems whose purpose is to facilitate access to a set of documents in electronic form (corpus) to allow a user to find the relevant ones for him, that is to say, the contents which matches with the information needs of the user.  Most of the models of information retrieval use a specific data structure to index a corpus which is called "inverted file" or "reverse index". This inverted file collects information on all terms over the corpus documents specifying the identifiers of documents that contain the term in question, the frequency of each term in the documents of the corpus, the positions of the occurrences of the word. In this paper we use an oriented object database (db4o) instead of the inverted file, that is to say, instead to search a term in the inverted file, we will search it in the db4o database. The purpose of this work is to make a comparative study to see if the oriented object databases may be competing for the inverse index in terms of access speed and resource consumption using a large volume of data.
Volume: 2
Issue: 1
Page: 205-214
Publish at: 2016-04-01

Optimization of Ship’s Route Scheduling Using Genetic Algorithm

10.11591/ijeecs.v2.i1.pp180-186
Vivi Nur Wijayaningrum , Wayan Firdaus Mahmudy
Route scheduling is a quite complicated process because it involves some determinant factors. Several methods have been used to help resolve the NP-hard problems. This research uses genetic algorithm to assist in optimizing ship scheduling, that where there are several ports to be visited by some ships. The goal is to divide the ship to go to a specific port so that each port is only visited by one ship to minimize the total distance of all ships. The computational experiment produces optimal parameters such as the number of popsize is 30, the number of generations is 100, crossover rate value is 0.3 and mutation rate values is 0.7. The final results is an optimal ship route by minimizing the distance of each ship.
Volume: 2
Issue: 1
Page: 180-186
Publish at: 2016-04-01

Single Phase Variable Sampling Phase Locked Loop using Composite Observer

10.11591/ijeecs.v2.i1.pp49-60
K Arun , K Selvajyothi
An observer based variable sampling period phase locked loop is introduced for grid connected systems. The composite observer acts as an efficient estimator of the fundamental components from a periodic input signal rich in DC and harmonics. The observer gains are designed using pole placement technique, which inherently ensures the stability of this estimator.  Even under drift frequency, a constant number of samples (512) per cycle are maintained with the help of the numerically controlled oscillator. This makes the oscillator gain elements in the observer a constant and eliminates the trigonometric computation. This phase locked loop is found to be working in a wide range of frequency 40 – 70Hz. The performance of the proposed scheme is studied with a synthetic harmonic rich signal as well as validated by implementing the PLL in Cyclone IV FPGA with a real time grid voltage.
Volume: 2
Issue: 1
Page: 49-60
Publish at: 2016-04-01

Optimal Siting and Sizing of Solar Power Sources in Interconnection Grid System

10.11591/ijape.v5.i1.pp1-13
S Yogendra Reddy , Daka Seshi Reddy , G. Kesava Rao
Growing concerns electrical power demand in need and necessity of daily livelihood of life. Impacted over addition power demanded there is climate impacts, environmental conditions due to conventional power generation resulted in improvement of cheaper solar power generation in the whole distribution system network, and programs offered by governments have contributed to an increment in the number of distributed energy resources (DERs) system in commercial and domestic electrical power output. It is well known that fact the non-optimal size and non-optimal siting system may lead to high power losses, bad voltage profiles and high losses of profit margins of DISCOM’s end. Therefore, this paper to determine the location best siting and filler of multiple DERs generators supported power loss, generation units, and cheaper power transfer demonstrated through IEEE 30 bus standard test system with help of Power World Simulator Package and single line drawing of 2MW solar PV power plant added to APDISCOM.
Volume: 5
Issue: 1
Page: 1-13
Publish at: 2016-04-01

Sparse Modeling with Applications to Speech Processing: A Survey

10.11591/ijeecs.v2.i1.pp161-167
Ahmed Omara , Alaa Hefnawy , Abdelhalim Zekry
Nowadays, there has been a growing interest in the study of sparse approximation of signals. Using an over-complete dictionary consisting of prototype signals or atoms, signals are described by sparse linear combinations of these atoms. Applications that use sparse representation are many and include compression, source separation, enhancement, and regularization in inverse problems, feature extraction, and more. This article introduces a literature review of sparse coding applications in the field of speech processing.
Volume: 2
Issue: 1
Page: 161-167
Publish at: 2016-04-01

Transient Stability Improvement Using UPFC-SMES in A Multi Machine Power System

10.11591/ijape.v5.i1.pp14-21
Kantilal Dayalal Joshi , Vinod Chandrakar
Unified Power Flow Controller (UPFC) is a Voltage sourced converter based Flexible A.C.Transmission  (FACTS) controller which has a capability of simultaneously or selectively controlling all the parameters affecting transmission of power.  With emphasis on harnessing renewable energy many energy storage technologies are being used. Superconducting magnetic energy storage (SMES) stores energy in magnetic form by means of a D.C. current circulating in a superconducting coil. To exchange power with SMES a power electronic interface is required. Feasibility of interfacing SMES to D.C. link of UPFC has been explored in this paper. A multimachine system with a long transmission line is compensated by UPFC-SMES .A DC-DC chopper modulates power of SMES so as to improve the transient stability of system. Complete simulation has been done using MATLAB/Simulink which shows improvement of first peak, damping of oscillations & improvement in critical clearing time.
Volume: 5
Issue: 1
Page: 14-21
Publish at: 2016-04-01

Automatic Voltage Generation Control for Two Area Power System Based on Particle Swarm Optimization

10.11591/ijeecs.v2.i1.pp132-144
Ali M. Ali , M.A. Ebrahim , M.A. Moustafa Hassan
This article presentes a PID controller for two area power system equipped with both automatic generation control and automatic voltage regulator loops. The research has been done to control two area power systems with PSO optimized self-tuning PID controller. The comparison between different controllers and the suggested PSO based controller illustrates that the proposed controller can generate the best dynamic response for a step load change. For this purpose, MATLAB-Simulink software is used. The obtained results are promising.
Volume: 2
Issue: 1
Page: 132-144
Publish at: 2016-04-01
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