Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

23,598 Article Results

Simulation research on ultrasonic guided waves detection of metal rod buffer system bonding quality

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2089
Yang Hu , Wang Cheng
The judgment of metal rod buffer system bonding quality depends on the bond of the metal rods with the surrounding medium. System bonding area will lead to different reflection amplitude. Compared the simulation with the experiment, it can be concluded that different bonding area can measure bond quality, i.e, the greater the bonding area is the more excellent bonding quality will be. This conclusion provides the basis for the system ultrasonic testing. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2193
Volume: 11
Issue: 3
Page: 1251-1257
Publish at: 2013-03-01

EEG signal classification for Epilepsy Seizure Detection using Improved Approximate Entropy

https://ijphs.iaescore.com/index.php/IJPHS/article/view/4597
Sharanreddy Mallikarjun Akareddy , P.K. Kulkarni
Epilepsy is a common chronic neurological disorder. Epilepsy seizures are the result of the transient and unexpected electrical disturbance of the brain. About 50 million people worldwide have epilepsy, and nearly two out of every three new cases are discovered in developing countries. Epilepsy is more likely to occur in young children or people over the age of 65 years; however, it can occur at any age. The detection of epilepsy is possible by analyzing EEG signals. This paper, presents a hybrid technique to classification EEG signals for identification of epilepsy seizure. Proposed system is combination of multi-wavelet transform and artificial neural network. Approximate Entropy algorithm is enhanced (called as Improved Approximate Entropy: IApE) to measure irregularities present in the EEG signals. The proposed technique is implemented, tested and compared with existing method, based on performance indices such as sensitivity, specificity, accuracy parameters. EEG signals are classified as normal and epilepsy seizures with an accuracy of ~90%.DOI: http://dx.doi.org/10.11591/ijphs.v2i1.1836
Volume: 2
Issue: 1
Page: 23-32
Publish at: 2013-02-14

Sliding mode Control using 3D-SVM for Three-phase Four-Leg Shunt Active Filter

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4939
Bouzidi Mansour , Benaissa Abdelkader , Barkat Said
This paper proposes a sliding mode control strategy for a three-phase shunt active power filter. The SAPF consists of four-leg voltage source inverter bridge. The SAPF ensures full compensation for harmonic phase currents, harmonic neutral current, reactive power compensation and unbalanced nonlinear load currents. The modulation task can be carried out with three dimensional space vector modulation, which operate under a constant switching frequency. The simulation results show that the performance of the four-leg SAPF with the proposed control algorithm – compared with PI controller - is found considerably effective and adequate to compensate harmonics, reactive power, neutral current and balance load currents.DOI: http://dx.doi.org/10.11591/ijpeds.v3i2.2012
Volume: 3
Issue: 2
Page: 147-154
Publish at: 2013-02-13

3D reconstruction of patient-specific femurs using Coherent Point Drift

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2070
Bin Zhang , Jinwei Sun , Zhiyong Chi , Shaobin Sun
This paper dealt with the problem that the overlapping digital radiographs couldn`t reflect the 3D space information of the patient-specific femur in the orthopaedic surgery diagnosis. A 2D-3D non-rigid registration method based on Coherent Point Drift was proposed to realize the 3D reconstruction of the patient-specific femur before the surgery, which used biplanar digital radiographs of the patient-specific femur and the CT volume data of a generic femur. With the advantages of low cost, fast imaging speed and little radiation to the patients and doctors, this method provided more effective 3D imaging information for the femur diagnosis and preoperative plans. The registration experiments showed that the proposed method recovered the 3D model and the pose of the patient-specific femur effectively with a fast, accurate and robust registration result, which had satisfied the needs of clinical application. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2158
Volume: 11
Issue: 2
Page: 1101-1110
Publish at: 2013-02-13

Vision-aided Navigation for Autonomous Aircraft Based on Unscented Kalman Filter

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2069
Junwei Yu
A vision-aided navigation system for autonomous aircraft is described in this paper. The vision navigation of the aircraft to the known scence is performed with a camera fixed on the aircraft. The location and pose of the aircraft are estimated with the corresponding control points which can be detected in the images captured. The control points are selected according their saliency and are tracked in sequential images based on Fourier-Melline transform. The simulation model of the aircraft dynamics and vision-aided navigation system based on Matlab/Simulink is built.The unscented Kalman filter is used to fuse the aircraft state information provided by the vision system and the inertial navigation system. Simulation results show that the vision-based navigation system provides satisfactory results of both accuracy and reliability.DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2250
Volume: 11
Issue: 2
Page: 1093-1100
Publish at: 2013-02-13

Compensation of Voltage Single-Phase SAG and SWELL Using Dynamic Voltage Restorer and Difference Per-Unit Value Method

https://ijece.iaescore.com/index.php/IJECE/article/view/5496
Mohammad Sarvi , Haniyeh Marefatjou
Recently, the demand for high power quality by customers, has increased significantly. Common power equipment to protect sensitive loads against voltage disturbances in distribution networks, which are known by D-FACTS devices include: D-STATCOM , DVR  and UPQC. Consequences resulting from industrial processes can be classified into two categories that are, nonlinear and unbalanced loads and high vulnerability to transient faults (such as voltage sag) in distribution systems. DVR is a equipment  which  was connected  in series  and  adjusting  the  loading  voltage by feeding  the  voltage  in  system. The  first  installation  was  in 1996.  usually  DVR  installed  between  sensitive loads feeder  and  source  in  distribution system. The  main  duty, fast support load  voltage (by fast detection algorithm)  during  disturbance  to  avoid  any  disconnection. In this paper approaches to compensate for voltage sag and swell as a common disturbance in voltage transmission and distribution networks is presented. A dynamic voltage restorer based on the average detection method for single-phase is discussed, in the other hand  this  paper describes the effect to using  DVR  inorder  to  restoring the voltage sag and swell by difference per-unit value method(average detection) in  distribution  system. The result of  single-phase  voltage  sag and swell simulation has been presented  by SIMULINK/ MATLAB.DOI:http://dx.doi.org/10.11591/ijece.v3i1.2134
Volume: 3
Issue: 1
Page: 83-92
Publish at: 2013-02-03

Research about Three Dimensional Reconstruction of Medical Image

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2063
Linan Fan , Xin Wang , Guangyuan Zhang , Qiechun Chen
In this paper, through comparison of different reconstruction algorithms for volume rendering, we put forward Ray Casting algorithm as the scheme of 3D reconstruction of medical image. We improved the image synthesis operator, and combined section sampling mode to reconstruct the image. Finally we rendered images on GPU. By using improved operator, we not only made the rendering speed accelerated, but also made the quality of rendering images improved. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2084
Volume: 11
Issue: 2
Page: 1047-1053
Publish at: 2013-02-02

Theoretical Analysis for Scale-down-Aware Service Allocation in Cloud Storage Systems

https://ijece.iaescore.com/index.php/IJECE/article/view/5489
Angli Liu
Servcie allocation algorithms have been drawing popularity in cloudcomputing research community. There has been lots of research onimprovingservice allocation schemes for high utilization, latency reductionand VM migration enfficient, but few work focus on energy consumptionaffected by instance placement in data centers. In this paper we propose an algorithm in which to maximize the number of freed-up machines in data centers, machines that host purely scale-down instances, which are reuiqred to be shut down for energy saving at certain points of time. We intuitively employ a probability partitioning mechanism to schedule services such that the goal of the maximization can be achieved. Furthermore we perform a set of experiments to test the partitioning rules, which show that the proposed algorithms can dynamically increase the number of freed-up machines substantially.DOI:http://dx.doi.org/10.11591/ijece.v3i1.1792
Volume: 3
Issue: 1
Page: 21-29
Publish at: 2013-02-02

Online Measurement on Flatness and its Uncertainty of Small Work-piece

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2062
LI Guihua , ZHANG Huajun , MA Xiushui
Flatness is a very important shape and position of plane surface error and has great influence on the operating function of the work-piece. The traditional measurement methods of flatness can not be satisfied with the real-time requirement, and the uncertainty of flatness is not easy to be evaluated either. So a new method is proposed based on Geometrical product specification (GPS) standard-chain. That is: the coordinate value of small work-piece is occurred by portable Coordinate Measure Machine (CMM), the flatness is calculated from these coordinates using least-square arithmetic, and the uncertainty of flatness is estimated by the experimental matrix. The qualified products are separated by the tolerance and the agreement of supply and demand sides, and all the results are shown in an interface in real-time. Random inspection shows that this method can realize to pick the rejects online, increase the measurement efficiency, and decrease the probability of misconstruction. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2083 
Volume: 11
Issue: 2
Page: 1041-1046
Publish at: 2013-02-02

Voltage Balancing Control Strategy in Converter System for Three-Level Inverters

https://ijece.iaescore.com/index.php/IJECE/article/view/5487
Srinu Vaseee , B.V. Sankerram
Outcome of DC-link capacitor voltage variation on inverter switching states is accessible and designed for three-level inverter. In this paper for back-to-back system by including five-level diode clamped topologies we are proposing a novel DC link balancing method. The algorithm which we proposed here is the improvement of variable switching frequency control policy which was previously introduced by means of three-level back-to-back system which depends on calculations of adjacent capacitor voltages which focuses on three-level DC link network to identify the information about potential variation in consecutive nodes. As per the above proposal, all four capacitors in DC link network are effectively balancing the voltage. Due to optimization of switching losses the proposed method has advantages over the variable switching frequency.DOI:http://dx.doi.org/10.11591/ijece.v3i1.1471 
Volume: 3
Issue: 1
Page: 7-14
Publish at: 2013-02-01

Test Method for Compression Resilience Evaluation of Textiles

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2014
Bao-guo Yao , Li-xia Yan , Jian-chao Wang , Shui-yuan Hong
A test method was proposed and a measurement system was developed to characterize the compression resilience properties of textiles based on the mechanical device, microelectronics, sensors and control system. Derived from the typical pressure-displacement curve and test data, four indices were defined to characterize the compression performance of textiles. The test principle and the evaluation method for compression resilience of textiles were introduced. Twelve types of textile fabrics with different structural features and made from different textile materials were tested. The one-way ANOVA analysis was carried out to identify the significance of the differences of the evaluation indices among the fabrics. The results show that each index is significantly different among different fabrics. The denim has the maximum compressional resilience and the polar fleece has the minimum compressional resilience. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.1992
Volume: 11
Issue: 2
Page: 674-680
Publish at: 2013-02-01

Power Flow Calculation for Traction Networks under Regenerative Braking Condition Based on Locomotive-Traction Network Coupling

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2036
Wang Bin , Hu Haitao , Gao Shibin , Han Xudong
The regenerative braking technology is widely applied in high-speed electric multiple units (EMUs). And the voltage rise problem at end of the traction network would be caused by regenerative braking attracts more and more attention. The arm of this paper is to analyze the power flow calculation for EMUs under regenerative braking condition. Power flow calculation was done for two different EMU operation conditions by using a “locomotive-traction network” coupling model. In this model, a constant power load model on an all-parallel AT network multi-conductor chain circuit model is considerable. The simulation analysis shows that the iterative calculation method used in the present study is characterized by fast convergence and high accuracy, and is suitable to power flow calculation for traction networks under the braking condition and traction condition. It can be used to analyze voltage distribution, and the impact of traction load on power quality of the public power grid, etc. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2033
Volume: 11
Issue: 2
Page: 848-854
Publish at: 2013-02-01

Mitigation of Voltage flicker and reduction in THD by using STATCOM

https://ijece.iaescore.com/index.php/IJECE/article/view/5498
S. Chandrasekhar , J. Brahmmam , M. Srinu
Voltage flicker is considered as one of the most severe power quality problems (especially in loads like electrical arc furnaces) and much attention has been paid to it lately. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on voltage source converters, FACTS devices have been gradually noticed to be used for voltage flicker compensation. This paper covers the contrasting approaches; dealing with the voltage flicker mitigation in three stages and reduction in total harmonic distortion and assessing the related results in details. Initially, the voltage flicker mitigation, using FCTCR (Fixed Capacitor Thyristor Controlled Reactor), was simulated. Secondly, the compensation for the six-pulse as well as 12-pulse Static Synchronous Compensator (STATCOM) has been performed. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12-pulse assignment of SATCOM and RLC filter (three phase harmonic filter). The obtained results show that STATCOM is very efficient and effective for the flicker compensation as well as harmonic sprectrum. All the simulations have been performed on the MATLAB Software.DOI:http://dx.doi.org/10.11591/ijece.v3i1.1951
Volume: 3
Issue: 1
Page: 102-108
Publish at: 2013-02-01

Modern Applications of Electronic Nose: A Review

https://ijece.iaescore.com/index.php/IJECE/article/view/5492
Hasin Alam , S. Hasan Saeed
Electronic noses have provided a plethora of benefits to a variety of commercial industries, including the agricultural, biomedical, cosmetics, environmental, food, manufacturing, military, pharmaceutical, regulatory, and various scientific research fields. Advances have improved product attributes, uniformity, and consistency as a result of increases in quality control capabilities afforded by electronic-nose monitoring of all phases of industrial manufacturing processes. This paper is a review of some of the more important and modern applications that have been of greatest benefit to the humankind.DOI:http://dx.doi.org/10.11591/ijece.v3i1.1226
Volume: 3
Issue: 1
Page: 52-63
Publish at: 2013-02-01

Digital Image Watermarking in Wavelet Domain

https://ijece.iaescore.com/index.php/IJECE/article/view/5486
Hitendra Suryavanshi , Amit Mishra , Shiv Kumar
Internet allows individuals to share the information.  The shared information is like text, image, audio and video files.  This information sharing results in some problems such as copyright violation, unauthorized use of documents. Such problems can be solved by using a technique called as digital watermarking. This paper presents different aspects of watermarking and how it is useful for intellectual property protection on internet.DOI:http://dx.doi.org/10.11591/ijece.v3i1.1745
Volume: 3
Issue: 1
Page: 1-6
Publish at: 2013-02-01
1 2 3
...
1573 1574
Show 1521 of 1574

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration