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Vibration-based hypervelocity impact identification and localization Research Article
Jiao BAO, Lifu LIU, Jiuwen CAO,jwcao@hdu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 4, Pages 515-529 doi: 10.1631/FITEE.2000483
Keywords: Ensemble learning Synchrosqueezied transform Gray-level co-occurrence matrix Image entropy Distance estimation
Adaptive compression method for underwater images based on perceived quality estimation Regular Papers
Ya-qiong CAI, Hai-xia ZOU, Fei YUAN
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5, Pages 716-730 doi: 10.1631/FITEE.1700737
Underwater image compression is an important and essential part of an underwater image transmission system. An assessment and prediction method of effectively compressed image quality can assist the system in adjusting its compression ratio during the image compression process, thereby improving the efficiency of the image transmission system. This study first estimates the perceived quality of underwater image compression based on embedded coding compression and compressive sensing, then builds a model based on the mapping between image activity measurement (IAM) and bits per pixel and structural similarity (BPP-SSIM) curves, next obtains model parameters by linear fitting, and finally predicts the perceived quality of the image compression method based on IAM, compression ratio, and compression strategy. Experimental results show that the model can effectively fit the quality curve of underwater image compression. According to the rules of parameters in this model, the perceived quality of underwater compressed images can be estimated within a small error range. The presented method can effectively estimate the perceived quality of underwater compressed images, balance the relationship between the compression ratio and compression quality, reduce the pressure on the data cache, and thus improve the efficiency of the underwater image communication system.
Keywords: Underwater image compression Set partitioning in hierarchical trees Compressive sensing Compression quality estimation
An End to End Modulating Transmission Scheme With Good Robustness Against the RPE-LTP Vocoder
Chen Liquan,Hu Aiqun,Xu Qing and Yang Xiaohui
Strategic Study of CAE 2007, Volume 9, Issue 12, Pages 81-85
A novel endtoend data transmission scheme based on OFDM mechanism with good robustness against the RPE-LTP vocoder in GSM voice channel is proposed. According to the character of RPE-LTP vocoder, data are modulated to orthogonal lowfrequency sinusoidal carrier. In OFDM, the modulation is done by IFFT and the modulated signals are conformed to the time and frequency characters of RPELTP vocoder. The results of simulation show that the transmission bit rate of the proposed scheme reaches 2.4 kb/s,and the bit error rate of the scheme is lower than 0.3 %. This scheme provides a new approach for realtime secure voice data transmission over GSM system.
Keywords: vocoder regular pulse excitedlong term prediction OFDM FFT
Complete coverage path planning for an Arnold system based mobile robot to perform specific types of missions Regular Article
Cai-hong Li, Chun Fang, Feng-ying Wang, Bin Xia, Yong Song,lich@sdut.edu.cn
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11, Pages 1530-1542 doi: 10.1631/FITEE.1800616
Keywords: 混沌机器人;Arnold动力学系统;压缩变换;全覆盖遍历路径;候选集
Sampling formulas for 2D quaternionic signals associated with various quaternion Fourier and linear canonical transforms Research Articles
Xiaoxiao HU, Dong CHENG, Kit Ian KOU,huxiaoxiao3650@163.com
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3, Pages 463-478 doi: 10.1631/FITEE.2000499
Keywords: Quaternion Fourier transforms Quaternion linear canonical transforms Sampling theorem Quaternion partial and total Hilbert transforms Generalized quaternion partial and total Hilbert transforms Truncation errors
Research of Lossless Image Compression Base on Level-scalability
Li Luwei,Zhou Shuoyan,Cai Yiyu
Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 33-37
A level-embedded lossless image compression method for continuous-tone still images is presented. Level (bit-plane) scalability is achieved by separating the image into two layers (the base layer and the residual layer) before compression. Excellent compression performance is obtained by exploiting both spatial and interlevel correlations. A comparison of the proposed scheme with a number of scalable and non-scalable lossless image compression algorithms indicates that the level-embedded compression incurs only a small penalty in compression efficiency over non-scalable lossless compression, while offering the significant benefit of level-scalability.
Keywords: data processing techniques lossless image compression context-based model embedded level
Sparse fast Clifford Fourier transform Article
Rui WANG, Yi-xuan ZHOU, Yan-liang JIN, Wen-ming CAO
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 8, Pages 1131-1141 doi: 10.1631/FITEE.1500452
Keywords: Sparse fast Fourier transform (sFFT) Clifford Fourier transform (CFT) Sparse fast Clifford Fourier transform (SFCFT) Clifford algebra
Jue WANG, Jun WANG
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 4, Pages 557-568 doi: 10.1631/FITEE.1601423
Keywords: Multistatic passive radar Compressed sensing Phase adjustment Fixed-point iteration technique
Jie Gao, Dongdong Gu, Chenglong Ma, Donghua Dai, Lixia Xi, Kaijie Lin, Tong Gao, Jihong Zhu, Yuexin Du
Engineering 2022, Volume 15, Issue 8, Pages 133-142 doi: 10.1016/j.eng.2021.03.032
A novel compression-induced twisting (CIT)-compliant mechanism was designed based on the freedom and constraint topology (FACT) method and manufactured by means of laser powder bed fusion (LPBF). The effects of LPBF printing parameters on the formability and compressive properties of the laserprinted CIT-compliant mechanism were studied. Within the range of optimized laser powers from 375 to 450 W and with the densification level of the samples maintained at above 98%, changes in the obtained relative densities of the LPBF-fabricated CIT-compliant mechanism with the applied laser powers were not apparent. Increased laser power led to the elimination of residual metallurgical pores within the inclined struts of the CIT mechanism. The highest dimensional accuracy of 0.2% and the lowest surface roughness of 20 μm were achieved at a laser power of 450 W. The deformation behavior of the CIT-compliant mechanism fabricated by means of LPBF exhibited four typical stages: an elastic stage, a heterogeneous plastic deformation stage, a strength-destroying stage, and a deformation-destroying stage (or instable deformation stage). The accumulated compressive strain of the optimally printed CIT mechanism using a laser power of 450 W went up to 20% before fracturing, demonstrating a large deformation capacity. The twisting behavior and mechanical properties were investigated via a combination of finite-element simulation and experimental verification. An approximately linear relationship between the axial compressive strain and rotation angle was achieved before the strain reached 15% for the LPBF-processed CIT-compliant mechanism.
Keywords: Laser 3D printing Laser powder bed fusion Compression-induced twisting-compliant mechanism Compression–torsion property Mechanical properties
Efficient coherent detection of maneuvering targets based on location rotation transform and non-uniform fast Fourier transform Research Articles
Ke Jin, Tao Lai, Yan-li Qi, Jie Huang, Yong-jun Zhao,jinke_xd@outlook.com
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 8, Pages 1251-1266 doi: 10.1631/FITEE.1900272
Keywords: Coherent integration Maneuvering target Parameter estimation Location rotation transform (LRT) Non-uniform fast Fourier transform (NuFFT)
High-Throughput Screening Using Fourier-Transform Infrared Imaging Article
Erdem Sasmaz, Kathleen Mingle, Jochen Lauterbach
Engineering 2015, Volume 1, Issue 2, Pages 234-242 doi: 10.15302/J-ENG-2015040
Efficient parallel screening of combinatorial libraries is one of the most challenging aspects of the high-throughput (HT) heterogeneous catalysis workflow. Today, a number of methods have been used in HT catalyst studies, including various optical, mass-spectrometry, and gas-chromatography techniques. Of these, rapid-scanning Fourier-transform infrared (FTIR) imaging is one of the fastest and most versatile screening techniques. Here, the new design of the 16-channel HT reactor is presented and test results for its accuracy and reproducibility are shown. The performance of the system was evaluated through the oxidation of CO over commercial Pd/Al2O3 and cobalt oxide nanoparticles synthesized with different reducer-reductant molar ratios, surfactant types, metal and surfactant concentrations, synthesis temperatures, and ramp rates.
Keywords: high-throughput FTIR imaging screening cobalt oxide CO oxidation
Asplitting-after-merging approach tomulti-FIB compression and fast refactoring in virtual routers Article
Da-fang ZHANG,Dan CHEN,Yan-biao LI,Kun XIE,Tong SHEN
Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 12, Pages 1266-1274 doi: 10.1631/FITEE.1500499
Keywords: Virtual routers Merging Splitting Compression Fast refactoring
Compressed sensing-based structured joint channel estimation in a multi-user massive MIMO system Article
Ruo-yu ZHANG, Hong-lin ZHAO, Shao-bo JIA
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12, Pages 2082-2100 doi: 10.1631/FITEE.1601635
Keywords: Compressed sensing Multi-user massive multiple input multiple output (MIMO) Frequency-division duplexing Structured joint channel estimation Pilot overhead reduction
Chen Maozhang,Peng Bo
Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 15-23
A disturbance vortex method for simulating rotor/stator interaction in turbomachinery was developed[1,2]. This method has some obvious advantages in simulating unsteady flow in turbomachinery, such as understandable physical picture and good convergency. However, there is an important simplification in reference 1, which ignores the disturbance expansion. As a result, the computational process is greatly simplified. The main purpose of the present paper is to take the disturbance expansion into consideration with the aim to lay down a solid mathematical and physical foundation for the disturbance vortex method. Since the disturbance expansion has been taken into account, one has to solve the mass, vorticity transport and energy transport equations for disturbance motion in a coupled way. These are the main differences between the present paperand reference 1.
To validate the computational method, the unsteady flows caused by rotor/stator interaction in the first stage of NASA - 67 compressor were simulated in reference 1. And unsteady velocity correlation parameters at several locations inside the passage were compared with the experimental data. In order to find out the influence of ignoring the disturbance expansion on computational results, the same example was studied in the present paper. From the simulation results it can seen that the disturbance vortex method still converges fast even the disturbance expansion is taken into consideration.
It is noted that the additional velocity component which is needed to meet the nonpenetrate condition on the body surface is expressed by an elliptic-type Laplace equation rather than a hyperbolic-type equation even the flow is unsteady and compressible. It is also noted that setting the disturbance expansion to be zero is not equivalent to an incompressible disturbance motion.
Keywords: turbomachinery rotor/stator interaction disturbance vortex method compressible flow unsteady flow
Learning-based parameter prediction for quality control in three-dimensional medical image compression Research Articles
Yuxuan Hou, Zhong Ren, Yubo Tao, Wei Chen,3140104190@zju.edu.cn,renzhong@cad.zju.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 9, Pages 1169-1178 doi: 10.1631/FITEE.2000234
Keywords: 医学图像压缩;高效视频编码(HEVC);质量控制;基于学习方法
Title Author Date Type Operation
Vibration-based hypervelocity impact identification and localization
Jiao BAO, Lifu LIU, Jiuwen CAO,jwcao@hdu.edu.cn
Journal Article
Adaptive compression method for underwater images based on perceived quality estimation
Ya-qiong CAI, Hai-xia ZOU, Fei YUAN
Journal Article
An End to End Modulating Transmission Scheme With Good Robustness Against the RPE-LTP Vocoder
Chen Liquan,Hu Aiqun,Xu Qing and Yang Xiaohui
Journal Article
Complete coverage path planning for an Arnold system based mobile robot to perform specific types of missions
Cai-hong Li, Chun Fang, Feng-ying Wang, Bin Xia, Yong Song,lich@sdut.edu.cn
Journal Article
Sampling formulas for 2D quaternionic signals associated with various quaternion Fourier and linear canonical transforms
Xiaoxiao HU, Dong CHENG, Kit Ian KOU,huxiaoxiao3650@163.com
Journal Article
Research of Lossless Image Compression Base on Level-scalability
Li Luwei,Zhou Shuoyan,Cai Yiyu
Journal Article
Sparse fast Clifford Fourier transform
Rui WANG, Yi-xuan ZHOU, Yan-liang JIN, Wen-ming CAO
Journal Article
Joint compressed sensing imaging and phase adjustment via an iterative method for multistatic passive radar
Jue WANG, Jun WANG
Journal Article
Formation Process and Mechanical Deformation Behavior of a Novel Laser-Printed Compression-Induced Twisting-Compliant Mechanism
Jie Gao, Dongdong Gu, Chenglong Ma, Donghua Dai, Lixia Xi, Kaijie Lin, Tong Gao, Jihong Zhu, Yuexin Du
Journal Article
Efficient coherent detection of maneuvering targets based on location rotation transform and non-uniform fast Fourier transform
Ke Jin, Tao Lai, Yan-li Qi, Jie Huang, Yong-jun Zhao,jinke_xd@outlook.com
Journal Article
High-Throughput Screening Using Fourier-Transform Infrared Imaging
Erdem Sasmaz, Kathleen Mingle, Jochen Lauterbach
Journal Article
Asplitting-after-merging approach tomulti-FIB compression and fast refactoring in virtual routers
Da-fang ZHANG,Dan CHEN,Yan-biao LI,Kun XIE,Tong SHEN
Journal Article
Compressed sensing-based structured joint channel estimation in a multi-user massive MIMO system
Ruo-yu ZHANG, Hong-lin ZHAO, Shao-bo JIA
Journal Article
Numerical Simulation of Rotor/Stator Interaction in Turbomachinery by Use of a Disturbance Vortex Method for Compressible Flow
Chen Maozhang,Peng Bo
Journal Article