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23,675 Article Results

Localizing Region-Based Level-set Contouring for Common Carotid Artery in Ultrasonography

10.12928/telkomnika.v11i4.1202
Yong; Sichuan University Chen , Xiao Ming; Sichuan University Zhou , Dong C; Sichuan University Liu
 This work developed a fully-automated and efficient method for detecting contour of common carotid artery in the cross section view of two-dimensional B-mode sonography. First, we applied a preprocessing filter to the ultrasound image for the sake of reducing speckle. An adaptive initial contouring method was then performed to obtain the initial contour for level set segmentation. Finally, the localizing region-based level set segmentation automatically extracted the precise contours of common carotid artery. The proposed method evaluated 130 ultrasound images from three healthy volunteers and the segmentation results were compared to the boundaries outlined by an expert. Preliminary results showed that the method described here could identify the contour of common carotid artery with satisfactory accuracy in this dataset.
Volume: 11
Issue: 4
Page: 791-796
Publish at: 2013-12-01

Path Control Experiment of Mobile Robot Based on Supervised Learning

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2937
Gao Chi , Luo Min Zhou , Zhang Heng
To solve the weak capacity and low control accuracy of the robots which adapt to the complex working conditions, proposed that a path control method based on the driving experience and supervised learning. According to the slope road geometry characteristics, established the modeling study due to ramp pavement path control method and the control structure based on monitoring and self-learning. Made use of the Global Navigation Satellite System did the experiment. The test data illustrates that when the running speed is not greater than 5 m / s, the straight-line trajectory path transverse vertical deviation within 士20cm ,which proved that the control method has a high feasibility. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3672
Volume: 11
Issue: 12
Page: 7533-7538
Publish at: 2013-12-01

Clustering-boundary-detection algorithm based on center-of-gravity of neighborhood

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2907
Wang Gui Zhi
The cluster boundary is a useful model, in order to identify the boundary effectively, according to the uneven distribution of data points int the epsilon neighborhood of boundary objects, this paper proposes a boundary detection algorithm S-BOUND. Firstly, all the points in the epsilon neighborhood of the data objects are projected onto the boundary of the convex hull of the neighborhood, and then calculate the center of gravity of the neighborhood. Finally, detect the boundary object according to the degree of deviation of the center of gravity of the neighborhood with the object. The experimental results show that the S-BOUND algorithm can accurately detect a variety of clustering boundary and remove the noises, the time of performance is also better. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3620
Volume: 11
Issue: 12
Page: 7302-7308
Publish at: 2013-12-01

Study on Multi-array Shaker Random Vibration Test Control

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2958
Gao Chun-hua , Ji Jin-bao , Yan Wei-ming , Li Fang-fang
Some basic algorithms and theories are discussed for 9-shaker random vibration test control in this paper. A correct algorithm RMS is presented without considering influence of cross spectrum. The algorithm can make the control spectrum of convergence stably and fastly. In order to solve the problem of multiple-point input and output synthetically weighting control,  Finite Markov Chains and Algorithmic is set forth for the first time to form the main control matrix. Finally through Matlab simulation and the results show that the method can meet the engineering demand. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3702
Volume: 11
Issue: 12
Page: 7699-7706
Publish at: 2013-12-01

Design and Modeling of an Integrated Micro-Transformer in a Flyback Converter

10.12928/telkomnika.v11i4.1153
M. Derkaoui; University of Sciences and Technology of Oran (USTO-MB) M. Derkaoui , A. Hamid; University of Sciences and Technology of Oran (USTO-MB) A. Hamid , T. Lebey; University of Paul Sabatier T. Lebey , R. Melati; University of Sciences and Technology of Oran (USTO-MB) R. Melati
This paper presents the design and modeling of a square micro-transformer for its integration in a flyback converter. From the specifications of the switching power supply, we determined the geometric parameters of this micro-transformer. The π-electrical model of this micro-transformer highlights all parasitic effects generated by stacking of different material layers and permits to calculate the technological parameters by using the S-parameters. A good dimensioning of the geometrical parameters reduces efficiently the energy losses in the micro-transformer and permits to reach the desirable value of the converter output voltage. We have also simulated the electromagnetic effects with the help of the software FEMLAB3.1 in two cases. The first case, without ferromagnetic core, the second case with ferromagnetic core, in order to choose the micro-transformer that has better electromagnetic compatibility with the vicinity components. To validate dimensioning of the geometrical and technological parameters, we have simulated with the help of the software PSIM6.0, the equivalent electrical circuit of the converter containing the electrical circuit of the dimensioned planar micro-transformer.
Volume: 11
Issue: 4
Page: 669-682
Publish at: 2013-12-01

A Future Home Power System with Contactless Power Transmission Technologies

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2867
Lan Jian Yu , Tang Hou Jun
The traditional home power system is not suitable for the current complex household appliances for its low efficiency, which need a new power system. In this paper, a future home power system with contactless power transmission (CPT) technologies is proposed. Besides, with the consideration of using renewable power, a solar power hybrid generation system is integrated in the future power system. In addition, the distributed power system is introduced to the proposed power system instead of traditional centralized power method. The distributed power system is more stable and efficient. On the other hand, thanks to the CPT technologies, household appliances will be more safe and friendly by using CPT systems than before by eliminating cords and plugs. A simulation by PSIM DEMO version of the proposed future power system shows that the proposed concept is feasible. Furthermore, a CPT prototype has been fabricated to analyze the circuit characteristics of the CPT system.A novel concept of home power system is proposed, elaborated in detail and simulated by computer software. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3692
Volume: 11
Issue: 12
Page: 7014-7020
Publish at: 2013-12-01

Optimizing Multi-agent MicroGrid Resource Scheduling by Co-Evolutionary with Preference

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2896
Hongbin Sun , Tian Chunguang
This paper presents a multi-agent framework for the control of distributed energy resources organized in Microgrids，which consists of integrated microgrids and lumped loads. Multiple objectives are considered for load balancing among the feeders, minimization of the operating cost, minimizing the emission, minimizing voltage profiles, minimizing active power losses. The agent represents message of microGrid unit and constitutes an autonomic unit. The network is achieved by the evolution of the agent based on the semantic negotiation. Based on the objectives evaluated by membership functions respectively, We propose a new Immune Co-Evolutionary Algorithm with Preference to solve it. Simulation results demonstrated that the proposed method is effective in improving performance and management of micro-sources. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3655
Volume: 11
Issue: 12
Page: 7222-7229
Publish at: 2013-12-01

Palmprint Verification Using Time Series Method

10.12928/telkomnika.v11i4.1188
Agus; Udayana University Anwar , Darma; Udayana University Putra , Agung; Udayana University Cahyawan
The use of biometrics as an automatic recognition system is growing rapidly in solving security problems; palmprint is one of biometric system which often used. This paper used two steps in center of mass moment method for region of interest (ROI) segmentation and apply the time series method combined with block window method as feature representation. Normalized Euclidean Distance is used to measure the similarity degrees of two feature vectors of palm print. System testing is done using 500 samples palms, with 4 samples as the reference image and the 6 samples as test images. Experiment results show this system can achieve a high performance with success rate about 97.33% (FNMR=1.67%, FMR=1.00 %, T=0.036).
Volume: 11
Issue: 4
Page: 749-748
Publish at: 2013-12-01

Ear Recognition Based on Forstner and SIFT

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2884
Ma Chi , Zhu Yongyong , Tian Ying
Extraction and expression of features are critical to improving the recognition rate of ear image recognition. This paper proposes a new ear recognition method based on SIFT (Scale-invariant feature transform) and Forstner corner detection technology. Firstly, Forstner corner points and SIFT keypoints are detected respectively. Then taking Forstner corner into the SIFT algorithm to calculate their descriptor as the image feature vectors. Finally ear recognition based on these feature is carried out with Euclidean distance as similarity measurement. A bi-directional matching algorithm is utilized for improving recognition rate. Experiments on USTB database show that the recognition rate reaches more 94%. The Experimental results prove the effectiveness of the proposed method in term of recognition accuracy in comparison with previous methods. It is robust to rigid changes of ear image and provides a new approach to the research for ear recognition. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.2760
Volume: 11
Issue: 12
Page: 7131-7137
Publish at: 2013-12-01

Evaluation of High Speed Hardware Multipliers - Fixed Point and Floating point

https://ijece.iaescore.com/index.php/IJECE/article/view/5426
Awais Ahmed , Syed Haider Abbas , Muhammad Faheem Siddique , Hussnain Haider
There is a huge demand in high speed arithmetic blocks, due to increased performance of processing units. For higher frequency clocks of the system, the arithmetic blocks must keep pace with greater requirement of more computational power. Area and speed are usually conflicting constraints so that improving speed results mostly in larger areas. In our research we will try to determine the best solution to this problem by comparing the results of different multipliers. Different sized of two algorithms for high speed hardware multipliers were studied and implemented ie. Parallel multiplier, Bit serial multiplier. The workings of these two multipliers were compared by implementing each of them separately in VHDL. A number of high speed adder designs are developed and algorithm and design of these adders are discussed. The result of this research will help us to choose the better option between serial and parallel multipliers for both fixed point and floating point multipliers to fabricate in different systems. As multipliers form one of the most important components of many systems, analysing different multipliers will help us to frame a better system with area and better speed.DOI:http://dx.doi.org/10.11591/ijece.v3i6.4185
Volume: 3
Issue: 6
Page: 805-813
Publish at: 2013-12-01

A Review of Communication Protocols for Intelligent Remote Terminal Unit Development

10.12928/telkomnika.v11i4.1206
Mohd Ruddin; Universiti Teknikal Malaysia Melaka (UTeM) Ab Ghani , Wan Nor Shela Ezwane W.; Universiti Teknikal Malaysia Melaka (UTeM) Jusoh , Mohd Ariff M.; Universiti Teknikal Malaysia Melaka (UTeM) Hanafiah , Siti Hajar; Universiti Teknikal Malaysia Melaka (UTeM) Raman , Zanariah; Universiti Teknikal Malaysia Melaka (UTeM) Jano
This paper reviewed all the possible interfacing communication protocols for remote terminal unit (RTU). Supervisory Control and Data Acquisition (SCADA) system is a central station that can communicate with other network using the protocol. Fundamentally, the architectures of all networks are based on the seven layers of open system interconnection (OSI) and International Standard Organization (ISO). The objective of designing the protocols is to check the status of all the input and output field devices and send the report according to that status. The corresponding protocol and communication parameters between the connecting devices will be included in designing a complex SCADA system. The available protocols to develop the communication of RTU are Modbus/ASCII, distributed network protocol (DNP3), controller area network (CAN), International Electro-technical Commission (IEC 60870), and transmission control protocol/internet protocol (TCP/IP).
Volume: 11
Issue: 4
Page: 819-826
Publish at: 2013-12-01

Stabilization Controller Design for a class of Inverted Pendulums via Adaptive Fuzzy Sliding Mode Control

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2899
Heng Liu , Jin Xu , Yeguo Sun
X–Z inverted pendulum is a new kind of inverted pendulum and it can move with the combination of the vertical and horizontal forces. This paper addresses  the control problem of X-Z inverted pendulum in the presents of system uncertainties and external disturbances, and an adaptive fuzzy sliding mode control approach is proposed. The fuzzy  system is used to approximate the system uncertainties and the complicated intermediate control functions in the backstepping control design. To update the parameters of the fuzzy system, a proper proportional-integral adaptation law is introduced.  Finally, simulation studies are done to show the stabilization of the X-Z inverted pendulum under the proposed method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.2985
Volume: 11
Issue: 12
Page: 7243-7250
Publish at: 2013-12-01

Information Dissemination and Control Models in Complex Network

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2931
Li Juan , Zhou Xueguang , Chen Bin
In order to well understand and control the information dissemination in the complex network, Increasing Trust SI model and SIP model have been built to represent the peoples' interaction during information dissemination. By introducing and computing the trust degree of the net nodes, the process of information dissemination can be truly represented following increasing trust rule. Simulation experiments reveal that the informations can be quickly broken out in ER model, NW model and BA model due to the small world characteristic of complex networks. To prevent bad information disseminating, SIP model with "Persuasion" mechanism is presented.  It can be effect when immune nodes with "P" status persuade their neighber disseminator with the truth.  Simulation experiments show that not all nodes in the network will be disseminated and all will lose the trust on the bad information. Exceptionally, the best effection is in BA network with free-scale. The results of this paper can be used for analysis and management of information dissemination on complex networks.DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3662
Volume: 11
Issue: 12
Page: 7484-7489
Publish at: 2013-12-01

The Scheme and the Preliminary Test of Object-Oriented Simultaneous 3D Geometric and Physical Change Detection Using GIS-guided Knowledge

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2928
Chang LI , Wenzhong SHI , Fangfang LI
Current methods of remotely sensed image change detection almost assume that the DEM of the surface objects do not change. However, for the geological disasters areas (such as: landslides, mudslides and avalanches, etc.), this assumption does not hold. And the traditional approach is being challenged. Thus, a new theory for change detection needs to be extended from two-dimensional (2D) to three-dimensional (3D) urgently. This paper aims to present an innovative scheme for change detection method, object-oriented simultaneous three-dimensional geometric and physical change detection (OOS3DGPCD) using GIS-guided knowledge. This aim will be reached by realizing the following specific objectives: a) to develop a set of automatic multi-feature matching and registration methods; b) to propose an approach for simultaneous detecting 3D geometric and physical attributes changes based on the object-oriented strategy; c) to develop a quality control method for OOS3DGPCD; d) to implement the newly proposed OOS3DGPCD method by designing algorithms and developing a prototype system. For aerial remotely sensed images of YingXiu, Wenchuan, preliminary experimental results of 3D change detection are shown so as to verify our approach. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3659
Volume: 11
Issue: 12
Page: 7462-7469
Publish at: 2013-12-01

Fuzzy Adaptive PID Control of a New Hydraulic Erecting Mechanism

10.12928/telkomnika.v11i4.1183
Liang; Xi’an Research Inst. Li , Jian; Xi’an Research Inst. Xie , Wei; Xi’an Communications Institute Li
Conventional erecting mechanism is cumbersome and the erecting velocity is slow, so a new hydraulic erecting mechanism is introduced in this paper. But it has two problems. First is the cooperation problem between the erect cylinder and the horizontal cylinder. Second, the nonlinearities and uncertainties exist in the system make the control precision poor. So the combined simulation model is built based on the software AMESim and Simulink. And from this model, the best cooperation time is confirmed. Further, the fuzzy adaptive PID controller is introduced to improve the control performance aiming to the nonlinearities and uncertainties. The fuzzy inference rules and parameters of the controller are also presented in this paper. Experiment results show that the cooperation time which received from the simulation is correct, and the fuzzy adaptive PID controller has nice tracking performance compared to the conventional PID controller and fuzzy controller.
Volume: 11
Issue: 4
Page: 715-724
Publish at: 2013-12-01
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