2014
2014
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Record 25 of
Title:Design and implementation of serial rapidio based on DSP and FPGA
Author(s):Liu, Jun(1,2); Tian, Yan(1); Hao, Wei(1); Qu, Lei(1,2)Source: Advanced Materials Research Volume: 971-973 Issue: DOI: 10.4028/www.scientific.net/AMR.971-973.1581 Published: 2014Abstract:In order to meet the request of high-speed data exchange in embedded systems, this paper details the high-speed SRIO (Serial RapidIO) interface protocol and the process of SRIO access timing between the local endpoint devices and the remote endpoint devices. And also we implement the design of the new high-performance RapidIO interconnection between DSP and FPGA. Through the performance testing of SRIO data transmission system, experimental results show that the design can stably transfer data at high speed between processors. ? (2014) Trans Tech Publications, Switzerland.Accession Number: 20142917962077 -
Record 26 of
Title:A design of real-time image processing platform based on TMS320C6678
Author(s):Qu, Lei(1,2); Tian, Yan(1); Liu, Jun(1,2)Source: Advanced Materials Research Volume: 971-973 Issue: DOI: 10.4028/www.scientific.net/AMR.971-973.1454 Published: 2014Abstract:For real time target detection, identification and tracking in high frame rates, large field of view images, a real-time image processing system is designed. A TMS320C6678 DSP runs as the chief arithmetic processor of this system and FPGA as the secondary controller. C6678 is compared with the same series C6414 in image compression algorithm test. Experimental results show that the new system has a more effective construct, and higher reliability, and can provide a platform for the new high-speed image processing. ? (2014) Trans Tech Publications, Switzerland.Accession Number: 20142917962048 -
Record 27 of
Title:A new destriping method combining moment matching and interpolation in infrared images
Author(s):Gong, Zhendong(1,2); Leng, Hanbing(1); Cao, Jianzhong(1); Wang, Jihong(1,2); Wu, Qingquan(1,2); Fan, Xinming(1,2); Zhao, Bing(1,2); Yang, Lei(1); Liao, Jiawen(1)Source: ICIST 2014 - Proceedings of 2014 4th IEEE International Conference on Information Science and Technology Volume: Issue: DOI: 10.1109/ICIST.2014.6920504 Published: October 10, 2014Abstract:Stripe noise is very common in uncooled infrared imaging systems and often severely degrades the image quality. Based on the analysis of existing methods, a new destriping method combining moment matching and interpolation was proposed. The method mainly consisted of three steps: Firstly, moment matching was used to eliminate most stripes. Then an adaptive algorithm was used to classify the left stripes into three types: one-pixel-width stripes, two-pixel-width stripes and local stripes. Finally, these left stripes were identified and removed with weighted multi-neighborhood interpolation. The algorithm was tested with IR images heavily polluted by stripe noises, and the result indicated that it could efficiently remove stripe noise and enhance the image quality significantly better than the single method discussed in literature. ? 2014 IEEE.Accession Number: 20144700232471 -
Record 28 of
Title:Environmental simulation evaluation of SSiC brazed optical mirrors
Author(s):Liu, Yan(1); Ma, Zhen(2); Chen, Jian(1); Chen, Zhongming(1); Liu, Xuejian(1); Huang, Zhengren(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 9280 Issue: DOI: 10.1117/12.2068140 Published: 2014Abstract:Sintered silicon carbide (SSiC) is becoming one of the most important materials for the optical mirrors due to its excellent specific stiffness (E/ρ) and demission stability (λ/α). However, it is difficult to fabricate the monolithic structure SSiC optical mirror with demission of larger than Φ1.5m because of process limitation. Joining of SSiC segments (brazing) provide a good solution to prepare large size mirror optics. However, compared with the uniform properties of the monolithic structure SSiC optical mirror, the brazed mirror is composed of two materials (SSiC segments and brazing material), so the performance of optical grinding and reliability of brazed optical mirrors become the focus. In this paper, the Φ300mm and Φ600mm brazed optical mirrors was used to evaluate the reliability of different conditions. Three kinds of environmental simulation tests, including thermal stability, thermal circle and random vibration were carried out. The evaluation results show that the temperature and vibration has no obvious effects on the surface figure (RMS) of the brazed optical mirrors. ? 2014 SPIE.Accession Number: 20150800541560 -
Record 29 of
Title:A frame correlation and Kalman filtering algorithm for space debris detection
Author(s):Xi, Jiangbo(1,2); Wen, Desheng(1); Song, Zongxi(1); Gao, Wei(1); Kang, Menghua(1,2); Mou, Jiao(1,2); Lu, Hao(1,2); Pang, Peng(1,2)Source: Journal of Information and Computational Science Volume: 11 Issue: 15 DOI: 10.12733/jics20104688 Published: October 10, 2014Abstract:An algorithm with frame correlative detection and Kalman filtering tracking was proposed to detect the multiple space debris in the optical astronomical images. It can reduce the large amount of calculation of sequential images. When the debris is covered by the star or disappears in view sight temporarily, the debris position can be estimated by Kalman filtering. At the end of the paper, a detection and tracking simulation is carried out. The results indicate that our algorithm is very effective for the space debris detection and tracking. Copyright ? 2014 Binary Information Press.Accession Number: 20144400136059 -
Record 30 of
Title:Study on grinding of free-form optics surface in three-axis CNC machine
Author(s):Yang, Hai-Cheng(1); Zhang, Yun-Long(1); Zhang, Feng(1); Wang, Zhi-Bin(1); Bao, Long-Xiang(2); Su, Ying(1); Guo, Rui(1); Liu, Xuan-Min(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 9281 Issue: DOI: 10.1117/12.2068429 Published: 2014Abstract:Due to the glass is a type of brittle material, so the high-precision free-form optics of glass material is usually machined by the technical of grinding. In this paper, for the characteristics of the diamond grinding wheel, analyzing the grinding path of free-form optics and mathematical model of the path is established based on the three-axis CNC grinding device. Moreover, the cause of the interference in the process of grinding is analyzed and the methods of avoiding. Finally, based on the above analysis results, through the experiment, the free-form optics surface accuracy was reached to 3.6um, realize the machining of the free-form optics. ? 2014 SPIE.Accession Number: 20153101081363 -
Record 31 of
Title:A Low-light-level CCD camera design and implementation of low cost and large field
Author(s):Yan, Su(1); Li, Hua(1); Wang, Hao(1,2); Zhou, Zuofeng(1); Yan, Aqi(1,2)Source: WIT Transactions on Engineering Sciences Volume: 84 VOLUME 1 Issue: DOI: 10.2495/MEEE20130381 Published: 2014Abstract:A low-light-level CCD camera is a high-tech, involving optics, electronics, machinery, and computer science in many fields. The technology now plays a crucial role in detection of early warning, identification tracking, public security, fire alarm and applications in many other fields. But the high cost make many consumers give it up.This paper mainly expands a low-light-level CCD camera design which is low cost and large field. And this paper introduces the camera structure in electronics. Experiment results in paper are posted. ? 2014 WIT Press.Accession Number: 20141217483121 -
Record 32 of
Title:An effective fusion based on compressive sensing
Author(s):Mou, Jiao(1,2); Gao, Wei(1); Song, Zongxi(1); Xi, Jiangbo(1,2); Wei, Laixing(1,2)Source: Journal of Information and Computational Science Volume: 11 Issue: 11 DOI: 10.12733/jics20104178 Published: July 20, 2014Abstract:Based on Compressive Sensing (CS) theory, an effective fusion method with the advantages of low sampling rate, simple structure and easy implementation is presented in this paper. We take single layer wavelet decomposition for two source images to obtain a low-frequency sub-band and three highfrequency sub-bands. The sparse matrix gotten by sparse representation of the high-frequency coefficients with the random matrix is only measured, then the low-frequency coefficients and the measurements of the high-frequency sparse matrix are fused with different schemes. After these process, high-frequency coefficients from the fused measurements is reconstructed via the Orthogonal Matching Pursuit (OMP) algorithm, and the fused image is obtained by inverse wavelet transform. Experimental results show, at the same sampling rates, the proposed method exhibits its superiority over the fusion method based on the Maximum of Absolute Values (MAV), self-adaptive weighted average fusion schemes based on entropy and standard deviation respectively, and under the lower sampling rate, it can also achieve better fusion performance. ?2014 Binary Information PressAccession Number: 20143600062475 -
Record 33 of
Title:Low-memory-usage and high-speed image wavelet transform
Author(s):Huang, Ji-Jiang(1); Cao, Jian-Zhong(1); Bo, Yi(1); Chen, Liu(2)Source: ICIST 2014 - Proceedings of 2014 4th IEEE International Conference on Information Science and Technology Volume: Issue: DOI: 10.1109/ICIST.2014.6920531 Published: October 10, 2014Abstract:Discrete wavelet transform (DWT) is being broadly used in processing digital image, but the large requirement of memory and the time delay limit the DWT usage. For instance, when the image is processed in the space, the realtime processing, low power consumption, reduced complexity and low memory consumption are required. Lifting-based DWT is implemented to lessen complexity. And then the coefficients of the lifting filters are turned to be binary and the filters are therefore implemented efficiently without using any multiplier. In this way the frequency of DWT can be improved and the architecture is simplified. When 2-dimensional DWT is carried out, the line-based wavelet transform is able to save memory in a larger sense. The architecture of line-based wavelet can also be executed in a parallel way. Both horizontal transform and vertical transform can be executed at the same time. This paper takes 9/7 wavelet as an example and compares with others its architecture and performance. The advantages of this design include real-time performance improvement, memory reduction and architecture simplification. ? 2014 IEEE.Accession Number: 20144700232457 -
Record 34 of
Title:Effect of Gb on phase transformation and martensitic phase transformation in Ni-Mn-In alloys
Author(s):Cheng, Ya Dong(1,2)Source: Advanced Materials Research Volume: 1015 Issue: DOI: 10.4028/www.scientific.net/AMR.1015.177 Published: 2014Abstract:The Ni-Mn-In alloy occur martensite reverse phase transitions driven by magnetic field in a certain composition range, resulting in the macroscopic strain, and along with the output of up to 108 MPa stress. However, there are some defects impeded practical application of alloy, such as brittleness and low Curie temperature. So, we will improve its mechanical properties by doping the suitable rare earth Gd elements in Ni-Mn-In alloy in this paper.In this paper, we study the microstructure, martensitic transformation and mechanical properties of Ni45.4Mn41.5-xIn13.1Gdx (x=0,0.2,0.5,1,2)magnetic shape memory alloy by DSC and Compression fracture strength and strain curve, which clarify the influence of Gd doping on martensitic phase transformation and mechanical properties of alloys.The studies have shown that the microstructure of the alloy changes from single organization into a mixed-phase structure of the matrix and the rich-Gd phase with the increasing of rare earth Gd content and martensitic transformation temperature of the alloys increases gradually with the increasing of Gd element content; The fracture strength and fracture strain increases first and then a decreasing trend with increasing the rare earth Gd elements. The result of the improved mechanical properties is the co-action of fine grain strengthening and second phase strengthening. ? (2014) Trans Tech Publications, Switzerland.Accession Number: 20143818169228 -
Record 35 of
Title:A method of small moving target detection
Author(s):Li, Bin(1,2); Wen, Desheng(1); Song, Zongxi(1); Zhao, Bingjie(1,2); Shen, Chao(1,2); Wu, Mengjie(1,2)Source: Journal of Information and Computational Science Volume: 11 Issue: 13 DOI: 10.12733/jics20104353 Published: September 1, 2014Abstract:This paper present a new method for detecting small moving targets from sequential images under the complex background of sky. The method can identify moving targets in low SNR, estimate and track the trajectory of the target using the maximum gray matrix and Kalman filter theory. Compared with other algorithms, this method has features of small amount of calculation, fast detecting speed, high real-time performance, and small identification error. Experimental results show that the pepper noise and fixed pattern noise in this type of image sequence have a good filtering effect, and also our method has good recognition and tracking effect for the small moving targets. Copyright ? 2014 Binary Information Press.Accession Number: 20144100087750 -
Record 36 of
Title:A modified artificial bee colony algorithm based on search space division and disruptive selection strategy
Author(s):He, Zhen-An(1,2,3); Ma, Caiwen(1); Wang, Xianhong(1); Li, Lei(4); Wang, Ying(4); Zhao, Yuan(1,2,5); Guo, Huinan(1)Source: Mathematical Problems in Engineering Volume: 2014 Issue: DOI: 10.1155/2014/432654 Published: 2014Abstract:Artificial bee colony (ABC) algorithm has attracted much attention and has been applied to many scientific and engineering applications in recent years. However, there are still some insufficiencies in ABC algorithm such as poor quality of initial solution, slow convergence, premature, and low precision, which hamper the further development and application of ABC. In order to further improve the performance of ABC, we first proposed a novel initialization method called search space division (SSD), which provided high quality of initial solutions. And then, a disruptive selection strategy was used to improve population diversity. Moreover, in order to accelerate convergence rate, we changed the definition of the scout bee phase. In addition, we designed two types of experiments to testify our proposed algorithm. On the one hand, we conducted experiments to make sure how much each modification makes contribution to improving the performance of ABC. On the other hand, comprehensive experiments were performed to prove the superiority of our proposed algorithm. The experimental results indicate that SDABC significantly outperforms other ABCs, contributing to higher solution accuracy, faster convergence speed, and stronger algorithm stability. ? 2014 Zhen-an He et al.Accession Number: 20144800264665