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23,598 Article Results

A Monolithic 0.18μm 4GHz CMOS Frequency Synthesizer

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2025
Wu Xiushan , Huan Changhong , Lv Wei , Hu Ming , Li Qing
A 4 GHz PLL (phase-locked loop)-type frequency synthesizer has been implemented in the standard 0.18μm mixed-signal and RF 1P6M CMOS technology. It integrates a VCO, a dual-modulus prescaler, PFD, a charge pump, a control logic, various digital counters and digital registers onto a single chip. With the help of the linear model of the loop, the design and optimization of the loop parameters are discussed in detailed. The measured results show that the locked range was 4096-4288 MHz and the phase noise could reach -117 dBc/Hz at 1MHz offset from the carrier 4.154 GHz, the output power is about -3 dBm. The chip area is 0.675 mm×0.700 mm. The DC power consumption of the core part is about 24 mW under 1.8 V supply. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2003
Volume: 11
Issue: 2
Page: 754-760
Publish at: 2013-02-01

Aligner Tones Software Improve Measurement Precision In The Process of Balinese Gamelan

https://ijece.iaescore.com/index.php/IJECE/article/view/5488
Made Sudarma , Ni Wayan Sri Ariyani , I Nyoman Adiputra
In the making process of Balinese gamelan, the tone arrangement highly depends on aligner sense and feeling which generally performed by the gamelan’s craftsman himself. Each aligner has his way of aligning with different standard of tone. Tunings process is still based on the sensitivity of the ear and the feelings of the gamelan craftsmen so that the precision of tone can not be achieved. The unavailable of a standard measuring instruments tone used in the tuning process lead to the production process gamelan in Bali takes a long time. To solve these problems, a study conducted by utilizing information technology in the computer - software engineering approach.Besides, to anticipate the limitation of human resources in the field of alignment and to maintain the consistency of the gamelan’s tone in the long period of time it is in need for the touch of information technology in the form of software. The software to analyze the frequency of gamelan’s base tone in order to get the result of the tone in the strip of gamelan which is measurable and in accordance with the expectation. The software is intended will be able to perform the test tone as desired by the buyer. Thus the tone of the achievements obtained quickly, accurately correspond to the reference tone. It also means that the program contributed significantly to the preservation of Balinese culture can be done.DOI:http://dx.doi.org/10.11591/ijece.v3i1.1481
Volume: 3
Issue: 1
Page: 15-20
Publish at: 2013-02-01

An Empirical Analysis on the Relationship between Logistics industry and Economic development of Henan Province

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2057
Yu-ping Chu , Jie-jie Liu
In view of modern logistics industry in economic development playing an increasingly important role, in order to explore the relationship between logistics industry and economic development of Henan province, this paper selects its relevant data of 1990-2010, establishing econometric model, quantitatively studying the relationship between economic development and its logistics industry, in the end we draw conclusions with logistics industry leading to a significant contribution to the economic development of Henan Province.  According to the conclusion, we can be more effective in considering the status of logistics industry in the economic development of the Henan Province, providing basis which related with decisions making for logistics policy. Finally, we make corresponding suggestions according to the conclusions. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2067
Volume: 11
Issue: 2
Page: 1005-1011
Publish at: 2013-02-01

Fuzzy Immune PID Control of Hydraulic System Based on PSO Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2041
Ma Yu , Gu Lichen
This paper takes the permanent magnet servo motor-driven hydraulic system as the research object. The hydraulic system power source uses servo motor instead of the original asynchronous motor, becoming a new energy-saving, fast response, and easy to realize closed-loop control hydraulic power systems. Aiming at variability of the load for the hydraulic system, immune algorithm is introduced to incremental PID controller and derive control law. Using fuzzy strategy approximating antibodies inhibit adjustment function to enhance the stability and robustness of the system, and designing fuzzy immune PID controller, parameters of controller are self-optimized by particle swarm (PSO) algorithm. This controller is applied to a hydraulic system, and achieved the precise control of the system flow in a variety of typical conditions. Simulation results show that: the controller can immune modulate automatically according to the dynamic changes of load of the hydraulic system, with fast tracking, small overshoot, and strong robustness advantages. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2048
Volume: 11
Issue: 2
Page: 890-895
Publish at: 2013-02-01

A Wavelet-based Algorithm for Vehicle Flow Information Extraction

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1980
Zhi Qiao , Li-duan Liang , Lei Shi , Ling-ling Li
This paper proposed an improved algorithm applied in video intelligent traffic control system for vehicle detection. The accuracy of original algorithm, which is based on the comparision of contrast and luminance distortion of present image with background, reduces greatly under bad weather because of false detection caused by noises in captured images.In this paper we chose Daubechies wavelet as mother wavelet to add a 2-dimension wavelet process before the algorithm, just after the imageis captured, to de-noise each captured image. We used FPGA-based equipments to test the algorithm, and the experiment proved higher performance of improved algorithm, especially under bad weather. http://dx.doi.org/10.11591/telkomnika.v11i1.1916
Volume: 11
Issue: 1
Page: 411-416
Publish at: 2013-01-13

High Output Voltage Based Multiphase Step-Up DC-DC Converter Topology with Voltage Doubler Rectifiers

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2065
Amir Mahmood Soomro , Xu Lingyu , Shahnawaz Farhan Khahro , Liao Xiaozhong
High Output Voltage Based Multiphase Step-Up DC-DC Converter topology with voltage doubler rectifiers is presented in this paper. High output voltage is obtained due to the series combination of voltage doubler rectifiers on the secondary side of high frequency transformers. This topology is useful in the application where the output voltage is greater than the input. The two loop control strategy has been developed in order to analyze the stable and effective working of the converter topology. Therefore the working mode analysis of the converter topology has been described in detail. The multiphase step-up DC-DC converter topology is first simulated on MATLAB and then a prototype has been designed in order to verify the simulation and experimental results. Finally the simulation and experimental results are found to be satisfactory. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.1856
Volume: 11
Issue: 2
Page: 1063-1068
Publish at: 2013-01-11

An improved Direct Adaptive Fuzzy controller for an uncertain DC Motor Speed Control System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2068
Duc Cuong Quach , Shuang Huang , Quan Yin , Chunjie Zhou
In this paper, we present an improved Direct Adaptive Fuzzy (IDAF) controller applied to general control DC motor speed system. In particular, an IDAF algorithm is designed to control an uncertain DC motor speed to track a given reference signal. In fact, the quality of the control system depends significantly on the amount of fuzzy rules-fuzzy sets and the updating coefficient of the adaptive rule. This can be observed clearly by the system error when the reference input is constant and out of a particular range or in the case of it varies with nonzero acceleration. So, in order to enhance quality of the system, increasing the amount of fuzzy sets and adjusting appropriately the updating coefficient of controller based on value of state error vector are needed. In addition, the proposed IDAF algorithm can control the DC motor speed under unstable supply voltages and varying loads. The control system is implemented on a dsPIC33FJ256MC710A 16-bit DSC (Digital Signal Processing Controller) board. Experimental results demonstrate the effectiveness of the proposed method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.1861
Volume: 11
Issue: 2
Page: 1083-1092
Publish at: 2013-01-11

Simulation and experiment study of optimizational PID control with changing integration rate

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1998
Hou Tao , Hong-xia Niu , Fan Duo-wang
This paper is to demonstrate an optimizational PID control with changing integration rate approach, and it was validated and researched by applying to the two-linked tanks system. Analyzed the control principle of variable integral PID in this research, and optimized the variable function of variable integral PID control to improve the design.Deduced the improved variable integral PID control algorithm,and it was applied to the two-linked tanks system. And then made a simulation system and application experiment in the advanced process control experimental apparatus to value it. The results show that the optimizational variable integral PID control enables the system to improve the rapidity,stationarity and accuracy, also shows that the correctness and superiority of the control method. It really an useful method to provide a advanced way for the control system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1808
Volume: 11
Issue: 1
Page: 550-558
Publish at: 2013-01-11

Global Convergence of A Kind of Conjugate Gradient Method

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1997
Can Li , Ling Fang , Xianglian Cao
The conjugate gradient method is welcome method for solving optimization problems due to its simplicity and low storage. In this paper, we propose a kind of conjugate gradient method. The presented method possesses the sufficient descent property under the strong Wolfe line search. Under mild conditions, we prove that the method with strong Wolfe line search is globally convergent even if the objective function is nonconvex. At the end of this paper, we also present numerical experiment to show the efficiency of the proposed method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1796
Volume: 11
Issue: 1
Page: 544-549
Publish at: 2013-01-11

Monitoring dispatching system based on Port's Internet of Things

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1947
Duanfeng Liu , Xuli Han , Xinru Liu
This paper proposes monitoring dispatching system solution based on the internet of things, which is through the analysis for port’s current situation, system components, operation process, communication protocol and safety alarm, etc. The system can fulfill real-time precise positioning monitoring and dispatching for port’s mobile terminals, and also fulfill real-time monitoring and effective management for the whole port. Eventually it can improve the total competitiveness of port by improving production efficiency of port, securing operation safety and decreasing production cost. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1882
Volume: 11
Issue: 1
Page: 151-157
Publish at: 2013-01-10

Digital-image Based Numerical Simulation on Failure Process of High-sulfur Coal

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1954
Ye Junjian , Zhang Qin , Zuo Yujun , Cheng Wei
Crushing of high-sulfur coal was important for physical desulfurization, but there were little research on crushing mechanism. This paper combined digital image processing technology and rock failure process analysis system RFPA2D to simulate the failure process of high-sulfur coal in Pu'an of Guizhou under uniaxial compression, and discussed the influence of horizontal restraint, existence and different geometric distribution of pyrite particle on mechanical performance and failure process of high-sulfur coal. The numerical results indicated that without horizontal restraint the compressive strength of high-sulfur coal was lower and monomial dissociation of pyrite particle was more sufficient than that with horizontal restraint. The compressive strength of coal containing pyrite particle was larger than that of pure coal and there was stress concentration in upper and lower pyrite particle during failure process. When pyrite particle distributed in the middle position of a coal sample, the compressive strength was higher than that of the other three positions, but monomial dissociation of pyrite particle was more sufficient than that of the other three positions, and this was beneficial to the following desulfurization operation. The study had certain reference value for crushing mechanism, crushing process design, selection of breaking equipment and energy saving and consumption reduction. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1889
Volume: 11
Issue: 1
Page: 203-212
Publish at: 2013-01-10

Simulating on Passengers Coordination with Distribution Service in Railway Station

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1977
Qian LI , Limin JIA , Changxu JI , Jianling Huang , Zhongyuan Jiang
Based on the hierarchical characteristics of passengers transfer behavior and the state-dependent queuing model, the D-M/G/C/C queuing network simulation model was put forward for simulating the coordination of subjective passenger behavior and objective distribution environment. Then, the generation method and algorithm of the model is elaborated. In case study, the simulation results are consistent with the actual states of passenger outbound process. So, it is a practical simulation tool for analyzing the dynamic situations of passengers use facilities. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1912
Volume: 11
Issue: 1
Page: 392-398
Publish at: 2013-01-10

Research of Emotion Recognition Based on Speech and Facial Expression

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1938
Yutai Wang , Xinghai Yang , Jing Zou
The paper introduced the present status of speech emotion recognition. In order to improve the single-mode emotion recognition rate, the bimodal fusion method based on speech and facial expression was proposed. The emotional databases of Chinese speech and facial expressions were established with the noise stimulus and movies evoking subjects' emtion. On the foundation, we analyzed the acoustic features of Chinese speech signals under different emotional states, and obtained the general laws of prosodic feature parameters. We discussed the single-mode speech emotion recognitions based on the prosodic features and the geometric features of facial expression. Then, the bimodal emotion recognition was obtained by the use of Gaussian Mixture Model. The experimental results showed that, the bimodal emotion recognition rate combined with facial expression was about 6% higher than the single-model recognition rate merely using prosodic features. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1873
Volume: 11
Issue: 1
Page: 83-90
Publish at: 2013-01-10

Study on Multi-objective Location of Distribution Center Based on Covering

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1979
SUN Lin , WU Xiang_lin , LIU Yue , SUN Yong_Zhe , QU Hui
Distribution center is an important part of modern logistics system. In the process of designing distribution center, running expense can be greatly reduced by selecting appropriate location of distribution center. In this paper, the covering method was used twice to choose the distribution center and minimize the total cost. At last, a case was given to test the model. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1915
Volume: 11
Issue: 1
Page: 406-410
Publish at: 2013-01-10

A Prioritized Test Generation Method For Pair-wise Testing

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1945
Yu Wang , Hao Wu , Zhenyu Sheng
The most sufficient test methods are based on a test case set which covers all combinations of parameters. However, the scale of test cases is always too large and their cost cannot be accepted. People will first consider the implementation of critical test cases. Even if the test is terminated suddenly, the test cases of high importance will have been executed. It improves the testing efficiency while securing the detection rate of defect. The contribution of this paper is how to generate pair-wise testing cases with a priority. Firstly, We design formulas to compute the weights of priorities. Secondly, we adopt a greed algorithm to solve the combined testing problems. Furthermore, we integrate the greed strategy into a genetic algorithm which makes the most efficient testing in critical parameters and their sets, and ensures its detection rate of defect under limited resources. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1880
Volume: 11
Issue: 1
Page: 136-143
Publish at: 2013-01-10
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