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23,598 Article Results

Enhancement of Non-Air Conducted Speech Based on Wavelet-Packet Adaptive Threshold

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1944
Sheng Li , Huijun Xue , Guohua Lu , Yang Zhang , Teng Jiao , Jianqi Wang , Xijing Jing
This study developed a new kind of speech detecting method by using millimeter wave. Because of the advantage of the millimeter wave, this speech detecting method has great potential application and may provide some exciting possibility for wide applications. However, the MMW conduct speech is in less intelligible and poor audibility since it is corrupted by additive combined noise. This paper, therefore, also developed an algorithm of wavelet packet threshold by using hard threshold and soft threshold for removing noise based on the good capability of wavelet packet for analyzing time-frequency signal. Comparing to traditional speech enhancement algorithm, the results from both simulation and listening evaluation suggest that the proposed algorithm takes on a better performance on noise removing while the distortion of MMW radar speech remains acceptable, the enhanced speech also sounds more pleasant to human listeners, resulting in improved results over classical speech enhancement algorithms. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1879
Volume: 11
Issue: 1
Page: 130-135
Publish at: 2013-01-10

Performance analysis and experimental study on Flat Optical Comb Generation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1932
Haining Li , Yingxiong Song , Yingchun Li
The performance of the optical frequency comb generation based on the re-circulating frequency shifter has been analyzed and demonstrated in this paper. We have theoretically analyzed the condition for flatness of the optical frequency comb and the relative intensity noise influence. We find out the influence to the flatness of optical comb owing to amplifier relative intensity noise and modulator relative factors imperfect, such as input RF signals amplitude and phase deviation and modulator defect owing to manufacture for the first time. Moreover, to verify the theoretical analysis, a 16 comb lines and spacing 12.5 GHz RFS generation system have also been carried out, and the results are in good agreement with the theoretical analysis results. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1867
Volume: 11
Issue: 1
Page: 28-39
Publish at: 2013-01-10

Using Relative Distance and Hausdorff Distance to Mine Trajectory Clusters

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1942
Bo Guan , Liangxu Liu , Jinyang Chen
Along with development of location service and GPS technology, mining information from trajectory datasets becomes one of hottest research topic in data mining. How to efficiently mine the clusters from trajectories attract more and more researchers. In this paper, a new framework of trajectory clustering, called Trajectory Clustering based Improved Minimum Hausdorff Distance under Translation (TraClustMHD) is proposed. In this framework, the distance between two trajectory segments based on local and relative distance is defined. And then, traditional clusters algorithm is employed to mine the clusters of trajectory segment. In additional, R-Tree is employed to improve the efficiency. The experimental results showed that our algorithm better than existing others which are based on Hausdorff distance and based on line Hausdorff distance. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1877
Volume: 11
Issue: 1
Page: 115-122
Publish at: 2013-01-10

The Research on CC2530 Nodes Communicating with Each Other Based on Wireless

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1983
Zhenghua Xin , Hong Li , Liangyi Hu
This work has completed the communication between the CC2530 coordinator and the child CC2530 nodes based on the Zigbee protocol. In this system, the object is detected by the CC2530 ultrasonic nodes. The distance is calculated and the message is formed. The message is sent to the coordinator by IIC bus which includes the control instruction. The coordinator receives the control information and will issue a command to control alcohol sensor to control the motor interface. The system can control the motor forward, backward and keep the DC motor still. The system can be widely used in agriculture and other fields. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1919
Volume: 11
Issue: 1
Page: 430-435
Publish at: 2013-01-10

A Survey on Weighted Network Measurement and Modeling

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1951
Xin Xia , Shu-xin Zhu
Real networks have complex topological structure characteristics such as pares of nodes have different strength and capacity connection. There are many instances in our real life. Every person has strong or weak relationship with others in social network and different reaction paths have non-uniform flow in metabolic network. In the food chain predator and prey have diverse relation and in the neural network electrical signal transmission paths have different capacity. All these systems could be described well by the concept of weighted network and weight of each edge in weighted network stand for the connection strength among individuals. This paper aims to provide an overview of recent advances in such study area. We first introduce a series of weighted network statistical characteristic parameter and concepts .Then in particular, we also discuss some practical network application examples. Empirical results show that pure topological model is not sufficient to explain the abundant and complex characteristics observed in real systems and it is necessary to improve such model. So we finally focus on some latest optimized weighted network models and give comparisons. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1886
Volume: 11
Issue: 1
Page: 181-186
Publish at: 2013-01-10

An Adaptive Blind Watermarking Algorithm for Color Image

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1965
Qiming Liu
This paper proposed a novel blind color digital watermarking algorithm based on Integer Discrete Wavelet Transform (IDWT) and Human Visual System (HVS). Firstly, color watermark image was processed into one dimension digital information, and color host image was converted into YIQ color space. Then, according to the features of HVS, encrypted watermark was embedded adaptively into the Y luminance component of the YIQ color space in IDWT domain. The proposed algorithm allowed extracting watermark without the help of original watermark and host image. Experiment results show that the embedded watermark is invisible and robust against common image attacks. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1900  
Volume: 11
Issue: 1
Page: 302-309
Publish at: 2013-01-10

Total Variation based Multivariate Shearlet Shrinkage for Image Reconstruction

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1933
Chengzhi Deng , Saifeng Hu , Wei Tian , Min Hu , Yan Li , Shengqian Wang
Shearlet as a new multidirectional and multiscale transform is optimally efficient in representing images containing edges. In this paper, a total variation based multivariate shearlet adaptive shrinkage is proposed for discontinuity-preserving image denoising. The multivariate adaptive threshold is employed to reduce the noise. Projected total variation diffusion is used to suppress the pseudo-Gibbs and shearlet-like artifacts. Numerical experiments from piecewise-smooth to textured images demonstrate that the proposed method can effectively suppress noise and nonsmooth artifacts caused by shearlet transform. Furthermore, it outperforms several existing techniques in terms of structural similarity (SSIM) index, peak signal-to-noise ratio (PSNR) and visual quality. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1868
Volume: 11
Issue: 1
Page: 40-47
Publish at: 2013-01-10

Implementation of Low-level Driver Interface for A CPU Card

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1974
Feng Luo , Fengjian Hu
In order to develop an automotive digital tachograph, a Central Processing Unit Card (CPU Card) interface IC is designed and implemented. The purpose of this paper is to present a driver proposal on the basis of a CPU card interface IC NCN6804. Under the platform of a Freescale’s microcontroller MPC5607B, the low-level driver interface is detailed both in hardware and software.  The test result shows that this low-level driver proposal can meet the operation demands of CPU cards, and this method is effective, especially in automotive applications. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1909
Volume: 11
Issue: 1
Page: 371-375
Publish at: 2013-01-10

Lebesgue-type Inequality for Orthogonal Matching Pursuit for Micro-coherent Dictionaries

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1955
Ye Peixin , Wei Xiujie
In this paper, we investigate the efficiency of some kind of Greedy Algorithms with respect to dictionaries from Hilbert spaces. We establish ideal Lebesgue-type inequality for Orthogonal Matching Pursuit also known in literature as the Orthogonal Greedy Algorithm for -coherent dictionaries. We show that the Orthogonal Matching Pursuit provides an almost optimal approximation on the first. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1890
Volume: 11
Issue: 1
Page: 213-226
Publish at: 2013-01-10

SVD-based MEMS Dynamic Testing Technology

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1935
Zhangfang HU , Chao JI , Yuan LUO
 To obtain the MEMS micro structure's high resolution measurement dynamic parameters ,this paper ,by obtaining stroboscopic imaging technology of micro structure of moving image sequence,  proposed one kind based on the phase correlation technique and singular value decomposition technique combining sub-pixel measurement method. By the method of phase correlation, image space coordinate can transform into the frequency domain to the coordinates of the parameter space. And then through the singular value decomposition technique to obtain the correlation matrix, using the least-squares fitting, get the sub-pixel level displacement measurement results. The experimental results show that, with this method of measuring MEMS micro structure plane motion amplitude can reach sub-pixel accuracy, and can be effectively reduced by uneven illumination effect on the measuring result, thereby increasing the measurement results of stability and reduces the measuring error. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1870
Volume: 11
Issue: 1
Page: 57-62
Publish at: 2013-01-10

Simulated Annealing Algorithm for Friction Parameters Identification

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1958
Qiang Chen , Junwei Bao , Minzhuo Wang , Haonan Ye , Fuqiang Peng
The present study is concerned with friction parameters identification in the pushing system of projectile of large caliber cannon howitzer. Coulomb model (CM) is adapted to build friction model in the process of pushing projectile. Random direction search algorithm (RDSA) is probably to get into the local best because of the large number of parameters to identify. So simulated annealing algorithm (SAA) based on continuous search space (CSAA) and based on discrete search space (DSAA) is applied to identify friction parameters. The identification results show that both CSAA and DSAA have better accuracy and convergence than RDSA, and CSAA has better accuracy than DSAA. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1893
Volume: 11
Issue: 1
Page: 245-252
Publish at: 2013-01-10

Research of VC Based Simulation Test System for Automotive ABS

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1957
Zhang Wei , Guo Xuexun , Wang Bin
A simulation test and analysis system for ABS control strategy was developed through the joint of VC++6.0 development platform and MATLAB/Simulink simulation platform. And the simulation test for ABS control strategy on four typical roads was carried out. Besides, the test results were analyzed. The test results showed that the system is able to give a good simulation of vehicles and roads and has the capacity of offering a good detection analysis. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1892
Volume: 11
Issue: 1
Page: 237-244
Publish at: 2013-01-10

Clonal Selection Algorithm Based Iterative Learning Control with Random Disturbance

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1985
Qun Gu , Xiao Hong Hao , Xian Jun Du , Wei Tao Xu , Yuanyuan Ju
Clonal selection algorithm is improved and proposed as a method to solve optimization problems in iterative learning control. And a clonal selection algorithm based optimal iterative learning control algorithm with random disturbance is proposed. In the algorithm, at the same time, the size of the search space is decreased and the convergence speed of the algorithm is increased. In addition a model modifying device is used in the algorithm to cope with the uncertainty in the plant model. In addition a model is used in the algorithm cope with the uncertainty in the plant model. Simulations show that the convergence speed is satisfactory regardless of whether or not the plant model is precise nonlinear plants. The simulation test verify the controlled system with random disturbance can reached to stability by using improved iterative learning control law but not the traditional control law. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1921
Volume: 11
Issue: 1
Page: 443-447
Publish at: 2013-01-10

A Study of Grouping Heuristicson Vehicle Scheduling ProblemBased on Changeable Expenditure Coefficient Model

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1978
Yong Zeng , Da-Cheng Liu , Ju-Xuan Li , Xiang-Yu Hou
A kind of vehicle scheduling problem(VSP) with non-full load and combined pick-up and delivery is studied， a changeable expenditure coefficient model according to the actual load is made，and grouping heuristicsalgorithmunder restrictions of vehicleload capacity、working time and mileage is designed to minimize the number of vehicle、the distance of empty load and the useless freight turnover．By programming and calculating，an example proves the algorithm is feasible and effectual. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1913
Volume: 11
Issue: 1
Page: 399-405
Publish at: 2013-01-10

Random Weighting Estimation of Poisson Distributions

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1956
Shesheng Gao , Wenhui Wei , Yongmin Zhong , Chengfan Gu
This paper presents a new random weighting method for estimation of Poisson distributions. A theory is established for random weighting estimation of the population parameters of two Poisson distributions with partially missing data. The strong convergence of the random weighting estimation is rigorously proved under the condition of  . The random weighting estimation of one-sided confidence intervals in Poisson distribution is also constructed, and its coverage probability is rigorously proved by using the Edgeworth expansion under certain conditions. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1891
Volume: 11
Issue: 1
Page: 227-236
Publish at: 2013-01-10
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