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February 30,2017
Volume 10,Issue 4
Pages -
Subject Area:Autocontrol Technology,Electronic Technology,Electronic Circuit,Artificial Intelligence,Computer Applications,Computer Simulation,Computer Image Processing,Computer Architecture,Data Security and Computer Security

Title: Study of two key problems of blind image restoration

Authors: HUANG Liqing, XIA Yousheng
PP: 454-470
Abstract: Effectively estimating the size of blur kernel and identifying its type are two key issues of blind image restoration. In order to solve them, a feature line detection-based algorithm for estimating the size of blur kernel and a dictionary learning-based algorithm for identifying the type of blur kernel are proposed in this paper for the first time, respectively. The feature line detection mainly includes logarithmic normalized feature matrix of blurred images, binary transform of feature matrix, and feature line statistical rules. Dictionary learning includes logarithmic normalized feature matrix of observed images and training library images, the calculation of structural similarity index, determining the best structural similarity between observed images and dictionary images. Experimental results show that the two proposed algorithms are very effective. Furthermore, an application to blind image restoration shows that the two proposed algorithms are useful and necessary.
Keywords: information processing technology; blind image restoration; blur kernel size estimation; blur type identification; parameterized model

Title: Redundancy control system design of power plant dumper based on PLC and WinCC

Authors: SUI Tao, REN Minghai, WANG Hao, TENG Da
PP: 448-453
Abstract: In order to improve the stability of the control system of the power plant dumper and its dumping efficiency, this paper mainly introduced the technological process of the whole control system of the dumper and hardware design selection, configuration of the programming software as well as the construction of the whole dual network redundancy control network and upper computer SIMATIC WinCC server/client mode configuration based on Siemens S7-400H redundancy programmable logic controller (PLC) control system of the dumper. Through the optimization design, the stability and the data transmission efficiency of the control system of the dumper increased, the failure rate of the control system and the cost of maintenance downtime were greatly reduced, the productivity and the safety of the system were improved.
Keywords: autocontrol technology; redundancy design; dumper control system; server/client mode

Title: Research on the etch process optimization of trench MOS barrier Schottky diode device

Authors: XU Chenyu
PP: 442-447
Abstract: This paper mainly describes the experience and result of improving pattern for trench MOS barrier Schottky (TMBS) diode device, and introduces the influence of all the process from etch process changes of the device. Based on researching of process flow, an etch process optimization of partial removal of silicon oxide under the bottom of the big trench has been put out. The device can not only maintain the characteristic morphology of the original, but also can improve the yield and reliability of wafer.
Keywords: semiconductor device and technology; trench MOS barrier Schottky; power diode; etch process

Title: Study on thermal analysis and investigation for transmission line Balun in project application

Authors: ZHENG Yunfeng
PP: 434-441
Abstract: In this paper, based on the combination of theoretical analysis and experimental verification, the phenomena and causes of heat dissipation in the application of high-power Balun in the process of equipment operation are described. According to the theoretical analysis, how to effectively reduce the heat dissipation of Balun and the feasibility of the method are verified by theory and experiments. The purpose of this paper is to control and reduce the aging and damage of the device caused by heat, which finally lead to the decline of the whole product performance and reliability. It is proved by theory and experiments that the ferrite core with high permeability and low conductivity can be used to effectively control the operating temperature of the high-power Balun. Although the reduction of winding turns increases the insertion loss of Balun, it can still work in a reasonable temperature range, which guarantees the reliability of the product. Experimental results showed that the working temperature of high power improved Balun was significantly lower than that before. So this method solved the heat dissipation of Balun when working in high-power occasions and kept product in good reliability.
Keywords: radio technology; Balun heat dissipation; ferrite core; eddy current; magnetic flux

Title: Design and implementation of the standing long jump test system based on FPGA

Authors: PEI Xiaofang, LIU Weifeng
PP: 427-433
Abstract: In order to improve the precision of standing long jump test, and meet the actual demand, this test system uses infrared distance measurement and system on a programmable chip (SOPC) technology. With field programmable gate array (FPGA) as the hardware carrier, Verilog HDL language and C language as design and development languages, nRF905 wireless transceiver module based on serial peripheral interface (SPI) module designer of Nios II soft core CPU is responsible for transferring the point to point communication of the test part and control part, then the measured data is transferred to the host computer for processing and display as well as stored in the database. In testing process, the upper computer determines the identity of the participants through the data in database, controls test ends of the selected balkline, and delimits the scope of infrared test. The error of the measured result is ±1 cm, and it is more intelligent and wireless.
Keywords: technology of electronics; infrared distance measurement; system on a programmable chip; field programmable gate array; nRF905; wireless transceiver

Title: Design and implementation of all-digital phase-locked loop based on single-chip CPLD

Authors: XIAO Weixiang, SHEN Weicong
PP: 421-426
Abstract: In this paper, a new digital phase-locked loop (DPLL) is designed for multiple frequency and phase locking of square wave signal. Its main function is to realize multiple frequency and phase locking of low and medium frequency square wave signal. The frequency doubling value can be set in real time through a variety of interfaces, and the phase-locked phase of the output square wave signal can be preset to 0° or 90°. The DPLL is an all-digital phase-locked loop based on complex programmable logic device (CPLD). It consists of a high-precision counter module, a 32-bit divider module, a multiple frequency signal generator, a signal divider, a phase measurement module, a phase compensation module, a counting compensation module and an interface control module. The entire digital system can load the full algorithm on a CPLD chip, the CPLD chip is customized into a DPLL chip to facilitate the DPLL to be used in a variety of circuits.
Keywords: elecronic circuit; digital phase-locked loop; multiple frequency; complex programmable logic device

Title: Face recognition using improved sparse representation

Authors: WU Pei, ZOU Chengming, ZHAO Guanghui
PP: 412-420
Abstract: As an effective classification method, sparse representation (SR) has been successfully used in the field of face recognition. However, the solution of l^1 norm in SR is complicated and costs a lot of time. To solve this problem, this paper proposes an improved SR method based on neighbor samples and Split Bregman algorithm for face recognition. First, principal component analysis (PCA) is used to reduce the dimensionality of all images. Then, a method of solving least squares through singular value decomposition (SVD) is used to solve l^2 norm. According to the least squares, the neighbors of the original samples can be solved. Next, based on the neighbor samples, the Split Bregman iterative algorithm is used to solve l^1 norm. Thus, the final SR can be obtained. Finally, the result of face recognition can be obtained through classification. A series of experiments have been done through the proposed algorithm in different face recognition datasets, ORL, CMU PIE and AR respectively. The results show that the proposed algorithm is robust. Besides, the effectiveness of the proposed method is faster than that of the traditional sparse representation based classification (SRC) and K nearest neighbor sparse representation based classification (KNN-SRC) algorithm.
Keywords: artificial intelligence; principal component analysis; sparse representation; singular value decomposition; neighbor samples; Split Bregman

Title: Comparison of SIFT and SURF algorithms on copy-move by blind detection

Authors: WANG Xinyi, YANG Zhenghong, ZHANG Weiwei, NIU Shaozhang
PP: 404-411
Abstract: In order to compare and analyze the blind detection speed and matching points when the image has been tampered with copy-move and subsequent modified (blur, rotate, scale) by the two feature algorithms, scale-invariant feature transform (SIFT) and speeded up robust features (SURF) algorithm. Photoshop and other image processing software are used to tamper image, then the two algorithms are used to carry out experimental research. Results showed that the detection rate of SURT algorithm is 3 to 7 times faster than that of SIFT algorithm, and the detetion effect is also better than the SIFT algorithm after the image is tampered with blur. But the detection accuracy is not as good as the SIFT algorithm when the image is tampered with scaling and rotation after copy-move. Therefore, in accordance with the requirements of accuracy and real-time under practical situations, the appropriate algorithm is selected to detdct.
Keywords: computer application; image forensics; copy-move forgery; blind detection; scale-invariant feature transform algorithm; speeded up robust features algorithm

Title: Development of experiment software for Computing Essentials based on parameterized knowledge points

Authors: GAO Shupeng, GAO Chao, LI Xianghua
PP: 394-403
Abstract: This paper develops an experiment software for Computing Essentials based on the abstract knowledge points. Different from existing softwares, the new software parameterizes the knowledge points and automatically generates test questions and examination papers in order to balance the conflicts between the quality and quantity of examination database. The auto-judgment and evaluation module are implemented in order to provide scores for students through extracting the knowledge points from the electronic examination papers based on the Visual Basic for Applications (VBA). Based on the system, students can improve their operating capabilities of Microsoft office software.
Keywords: computer application; computing essentials; knowledge points; examination

Title: Research on simplification of finite element simulation model of an engine tensioner

Authors: LI Changlong, HU Yumei
PP: 387-393
Abstract: The operating principle of a tensioner of engine front end accessory drive (EFEAD) system is studied in this paper. Based on structure theory analysis, an implicit quadratic equation with one unknown is derived to indicate the relationship between the load and rotational angle, so as to establish a simplified theoretical model. Then a simplified finite element model is built to conduct a transient analysis. The simulation results show a good agreement with the experimental data. The new model also gives an apparent improvement to the computational efficiency. The simplified model can be used to the EFEAD system to conduct a finite element analysis.
Keywords: computer simulation; engine front end accessory drive; tensioner; theoretical analysis; model simplification; finite element analysis

Title: Research and implementation of plate stain detection algorithm based on quartering

Authors: ZHENG Minghu, GUO Jian, ZENG Yadan
PP: 381-386
Abstract: This paper proposed an efficient and timely stain detection algorithm for biodegradable disposable cutlery. The dynamic threshold was adopted to extract the defect points, and quartering which segments the image by iterating several times was used to find the densest area of the defect point, so as to decide whether the stain was apparent or not, and then the plate was labeled by whether being qualified or not according to the result. The experimental results show that the correct detection rate of the algorithm is up to 96%, which meets the basic needs of production.
Keywords: image processing; plate detection; defect points detection; stain detection; quartering

Title: A driver system design of smart TV bases on layered components

Authors: YI Yuan, ZHU Yongxin, CHEN Gushun
PP: 372-380
Abstract: In recent years, the software and hardware function of smart TV is becoming more and more complex and diversified. The bottleneck of chip’s lower level driver system is how to make it adapt to the emerging new applications quickly. We present a smart TV driver system design, based on component based development (CBD), which makes it flexible to meet the changes in application and middleware. Meanwhile, its internal components also use the layered design structure to make it easy to have different ways of implementation. Through the practice of specific projects, it is feasible to shorten the period of project development and maintenance, reduce the development cost, and improve the driver system versatility, scalability and reusability. In this paper, we presents a smart TV driver system design, it based on component based development (CBD) , which make it be flexibly to meet the changes in application and middleware. Meanwhile, its internal components also use layered design structure, so that it can be applied in different chips. Through the practice of specific projects, it is feasible to shorten the period of project development and maintenance, and make the driver system versatility, scalability, reusability and robustness. .
Keywords: computer system architecture; software architecture; lower level driver; smart TV; component; layered technology

Title: An image encryption transmission method based on chaos theory and RSA algorithm

Authors: YANG Yimei, YANG Yujun
PP: 365-371
Abstract: In order to realize the secure transmission of digital image, the image needs to be encrypted. This paper proposed a method based on chaos theory and RSA algorithm. This method scrambled and encrypted the pixels of the image using chaotic sequence generated by Chua’s circuits chaotic system. Theoretical analysis and simulation results show that the method of image encryption has a large key space, secret key sensitivity and many other solid performances and transmission process is safe and reliable.
Keywords: data security and computer security; information security; image encryption; chaos theory; RSA algorithm

Title: Cloud platform privileges control and audit system

Authors: YANG Chunpeng, LIU Chuanyi
PP: 356-364
Abstract: Objectively, cloud administrators have both technical means and monetary motivation to misuse privileges to control and steal users’ data in the cloud platform. It is challenging to divide the least privileges, real-time control and post-audit cloud administrators’ operations. This paper firstly performs several attacks on the cloud platform to demonstrate that malicious cloud administrators can take advantage of privileges to steal users’ data. Secondly, this paper summaries the main technical approaches of recent researches: cloud administrators’ privileges division and run-time permissions control. Finally, this paper designs and implements a cloud platform privileges control and audit system to improve the applicability of cloud platform management privilege division and cloud platform runtime privilege verification.
Keywords: data security and computer security; cloud computing; permissions division; privileges control; log audit

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