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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
Arjuna Subject : -
Articles 103 Documents
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Search results for , issue "Vol 12, No 3: March 2014" : 103 Documents clear
Design of 3 mm band Detector Indoor Calibration System Wei Wang; Wangjie Chen; Li Wu; Shusheng Peng
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

A 3mm band detector indoor calibration system is introduced in this paper, which is based on a STM32 embedded system. This embedded control system includes noise source control circuit, database circuit, a real time clock circuit, humidity and temperature sensor circuit, PS/2 interface circuit and SD card interface circuit. And a database, which contains radiation characteristics of metal targets, is built in this calibration system. Experiment results demonstrate that the indoor system could satisfy the requirement of 3 mm band detector calibration. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4501
Heritage Values Mathematical Model Design of Middle Eastern Railway Architectural Complex Jun ZHANG; Daping LIU; Yao SUN
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Combining the practical situation, this article analyzes the heritagevalue of Middle Eastern Railway buildings in Hengdao Hezi from various perspectives.Research framework is established, including overview, architectural scale andpattern, building components, structure and space,and this paper designs heritagevalues mathmatical model of Chinese Eastern railway architectural complex. By usingAnalytic Hierarchy Process (AHP), research on the quantization and cascadeprotection was also carried out. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.3943
Comprehensive Evaluation of CNC Machine Tools Accuracy Based on AHP ZhiMing Feng; Guofu Yin; Haifeng Lin; Xiaxia Gong
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to evaluate the accuracy of a numerical control machine tool comprehensively, the accuracy evaluation index system of a numerical control machine tool was established, and the priorities of accuracy indexes were determined by analytic hierarchy process method. Taking a five-axis numerical control machine tool for example, each accuracy index of it was studied by using fuzzy comprehensive evaluation, and a membership function was constructed by the intermediate form trapezoidal distribution. The evaluated result indicated that the accuracy of this numerical control machine tool was excellent. As a reference, the method presented in this paper could be used to evaluate the accuracy of other numerical control machine tools. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.3715
Design and Analysis of A New Assistive Face-Washing Device Zhou Yulan; Han Lianlong; Li Gang; Hou Qingdong; Chai Yongsheng
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

To help arm-disabled persons for washing, an assistive face-washing device was developed. The crank-link and flat putter-cam mechanisms were used to create hands movement for face washing by synthesis the flip and rotation movements during the washing process. The structure and water circuit of the device were designed in detail. Later, the three-dimensional model was constructed and the assembly and simulation as follow proved the feasibility of the design. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4665
Comparisons of Threshold EZW and SPIHT Wavelets Based Image Compression Methods Xiaofeng Wu; Shigang Hu; Zhiming Li; Zhijun Tang; Jin Li; Jin Zhao
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Images require substantial storage and transmission resources, thus image compression is advantageous to reduce these requirements. The objective of this paper is to implement the concept of wavelet based image compression to gray scale images using different wavelet techniques. The techniques involved in the comparison process are threshold method, EZW(embedded zerotree wavelet) and SPIHT(set partitioning in hierarchical trees). These techniques are more efficient and provide a better quality in the image.  Matlab is used to be carried out the simu1ation where different wavelet and different methods for image compression are applied. The techniques are compared by using the performance parameters CR (Compression Ratio), PSNR (Peak Signal to Noise Ratio), MSE (Mean Square Error), and BPP (Bits per Pixel). Images obtained with those techniques yield very good results. The results showed that the compression effect of wavelet threshold compression is not good; wavelet decomposition level and wavelet function impact on the compression effect; Wavelet based image compression based on EZW and SPIHT are more efficient. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4437
Study of Layers Construct for Data Mining Platform Based on Cloud Computing Yongzheng Lin
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

AT the present time, data separately stored in network can’t be mined efficiently, the layers construct for data mining platform based on cloud computing is put forward in this paper, and, all the function modules and the main designed methods are analyzed in details. The construct has been proved to be scientific and feasible by researches. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.3864
Cayley Transform of Position and Orientation Measurement with Monocular Vision Li Mingsuo Jidin; Yan Zhanjun; Li Wenqiang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In monocular vision-based position and attitude measurement, the non-linear iteration method based on feature-point geometric constraints is usually used to obtain results with higher accuracy. However, due to its strict geometric constraints to the feature points of target object and the requirement for highly-accurate initial value by iteration process, this algorithm is relatively poor in reliability. In this paper, Cayley transform is applied to the monocular vision-based position and attitude measurement; through an equivalent transformation from the unit orthogonal rotation matrix to 3D vectors by using Cayley transform, the computational process can be linearized, such that the complicated iterations caused by non-linear feature-point geometric constraints are eliminated, and the number of required feature points is reduced. Test data show that Cayley transform is practical and effective in the monocular vision-based position and attitude measurement. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4425 
Optimization of Vacuum Pyrolysis Process Using Generalized Regression Neural Network Xiaohua Li; Yongsheng Fan; Yixi Cai; Weidong Zhao; Haiyun Yin; Ning Yu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

A new empirical technique to construct predictive models of vacuum pyrolysis process is presented in this study. Pyrolysis of biomass for preparing bio-oil was studied on a vacuum pyrolysis system, where rape straw was chosen as the raw material. The experiments ran based on orthogonal experimental design method. The operation factors of the system including pyrolysis temperature, system pressure, heating rate and holding time were chosen as input variables, while bio-oil yield and energy transformation ratio were selected as output to establish the prediction models based on Generalized Regression Neural Network (GRNN). The operation factors of the system were optimized for maximizing bio-oil yield and energy transformation ratio, and the optimization result was confirmed by experiments. The results of research showed that the predicted values are fit well with the experimental values, which verifies the effectiveness of the prediction models. Optimal conditions are obtained at pyrolysis temperature of 486.8℃, heating rate of 18.1℃/min, reactor pressure of 5.0kPa and holding time of 55.0min. Confirmation runs give 41.9%, 42.5% and 42.1% of bio-oil yield and 34.3%, 34.0% and 34.9% of energy transformation ratio compared to 43.6% and 35.5% of predicted value. Therefore, the forecasting model based on the GRNN is able to result in good prediction and has research value to the reality. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4496
The Sharing Telecommunication Information Resources Management System Based on B/S model and GIS Hongren Jiang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to reduce the repeated construction between telecom operators and telecom facilities, improve the utilization rate of telecom infrastructure, the use efficiency of earth ,the sources of energy and the consumption of raw materials, the protection of the natural environment and landscape, promote the sharing of telecom infrastructure. With the current telecom information highly integrated conditions, considering the current business models and business processes, establish centralized telecom infrastructure information platform, to strengthen the integration of resources monitoring and performance evaluation. On the analysis of the current situation and existing problems of domestic industry on the basis of this unit, combining with the management requirements, research and design based on B/S model and WebGIS the co-construction and sharing of information management system, this paper first demand analysis in this system, on the basis of the detailed design of the system are presented. The scheme is mainly includes: information release platform, basic information recorded: "base stations, utility, tower, computer room, room points, piping, rod way, transmission lines and stations nets" as the foundation object management, data query and statistics, the economic comparison, assessment rating, log monitoring, telecom infrastructure geographic information system (GIS) and other modules. The business management system will daily management work in network platform, solving day-to-day business management problems. Improve business processing efficiency, to change the current business processing mode, improving the business management level. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4800
Moisture Transfer Models and Drying Characteristics of MSW Containing High Moisture CHEN Shu; Xiao-qian MA; Zeng-ying LIANG
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The effect of high moisture content on drying characteristics of high moisture municipal solid waste (MSW) material, such as carrot peel and pomelo peel was investigated. The experimental data used to fit the selected published mathematical drying models of samples， were conducted in a thermogravimetric furnace. Weight reduction during drying was measured with a microbalance in the range of 80-140℃. The variations of moisture content and drying rate at different temperature were considered. The results show that with increasing in drying temperature the drying time decreased and the maximum drying rate increased at the beginning of drying process .The effective diffusivity ranged from 1.49×10-9 to 1.25×10-8m2/s with Fick’s diffusion equation. The activation energy value of 17.12kJ/mol and 37.48kJ/mol was determined through Arrhenius equation. The Modified Page model and Weibull distribution model were the most adequate models in describing the drying process of MSW samples. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4478

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