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2014 International Conference on Industrial Engineering and Information technology

作者： Jie LI Kai ZHAN Pan-pan LIU Xiao-nian HE Zheng-di QIN National-Regional Key Technology Engineering Laboratory of China for Medical Ultrasound Guangdong Province Key Laboratory for Biomedical Information Detection and Ultrasound Imaging Department of Biomedical Engineering Health Science CenterShenzhen University

In ultrasound systems,the analysis of inherent signal-to-noise(SNR) is one of the eternal *** signal improvements of approximately 10 times are theoretically possible for ultrasonic testing(UT) using coded *** applying the coded excitation into the ultrasound pulse-echo system,codes selection is important as the limited time duration of the transmission *** selected code sequences can hardly get a good auto-correlation *** earlier reports,a technique called Truncated Long Code(TLC) was proposed for dynamic signal detection [1][2][3].Good auto-correlation property has been acquired as the parameter estimation time window can be much longer than the single pulse *** this report,we use the same approach to form a multi-segment coding scheme to detect the stationary objects in ultrasound pulse-echo *** importance of this study are to confirm the efficacy of this new scheme and try to find possible uses in biomedical and industrial applications as well.

关键词： Coded excitation,multi-segment coding,pulse-echo,ultrasound system

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An improvement method of a lossless compression scheme for the datacube from Geostationary Interferometric infrared Sounder (GIIRS) and its FPGA implementation

An improvement method of a lossless compression scheme for t...

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IEEE Joint International Information technology and Artificial Intelligence Conference (ITAIC)

作者： Minzhu Yang Raúl Guerra Hernández Changpei Han José Francisco López Feliciano Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province College of Information Engineering China Jiliang University Hangzhou China Key Laboratory of Infrared System Detection and Imaging Technology Chinese Academy of Science Shanghai China Instituto Universitario de Microelectrónica Aplicada Universidad de Las Palmas de Gran Ganaria Las Palmas Spain

ISBN: (数字)9781728152448

ISBN: (纸本)9781728152455

This paper briefly described an improved method for the original proposed scheme based on Vector Quantization and Linear Prediction to further enhance the compression ratio while reduce the time cost. Given the fact that the interferograms belong to the same datacube are similar to each other, there are two obvious modifications in this paper: predict only once to get the general predicted coefficients for the same datacube; along with treat datacube rather than sequence as the encoded unit. The time consumption spent by Linear Prediction part will shrink about 35.55% by predicting just once. Moreover, the change of the encoded object makes the final compression ratio get a further rise range from 2.62% to 3.711%.

关键词： Vector quantization Conferences Information technology Artificial intelligence Field programmable gate arrays

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Exploratory Research on Multidimensional Information Modulation and Calibration Methods in infrared Computational imaging 6

Exploratory Research on Multidimensional Information Modulat...

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6th Conference on Frontiers in Optical imaging and technology: Novel imaging Systems

作者： Zhou, Weiwen Li, Dapeng Liu, Sha Wu, Jianrong Zhang, Xiaotong Shanghai Aerospace Control Technology Institute No.1555 Zhongchun Road Minhang District Shanghai201109 China Shanghai Academy of Spaceflight Technology No.3888 Yuanjiang Road Minhang District Shanghai201109 China Infrared Detection Technology Research & Development Center of CASC No.1555 Zhongchun Road Minhang District Shanghai201109 China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Science Shanghai201800 China

ISBN: (数字)9781510679719

ISBN: (纸本)9781510679702

With the continuous development of new infrared optoelectronic detection methods, the computational imaging based on encoding mask has received attention due to its ability to obtain spatiotemporal synchronous multidimensional information including intensity, spectrum, and polarization. However, the research results of this technology in the infrared band are relatively scarce at present. As is well known, one of the challenges in infrared computing imaging technology is information modulation and calibration. Only by obtaining a multidimensional information calibration dictionary can subsequent system integration and information recovery be completed. This paper focuses on multi-dimensional information modulation and high-precision calibration technology, and simultaneously conducts research on optimization schemes for multi-dimensional information calibration. Finally, performance indicators are verified using speckle field autocorrelation algorithm. The simulation results indicate that the multi-dimensional information modulation and calibration technology adopted in this paper can effectively obtain the multi-dimensional information calibration dictionary, laying the foundation for the subsequent integration of infrared computing imaging systems. © 2024 SPIE.

关键词： Calibration

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Experimental study on the truncated long code sequence for ultrasound Doppler detection

Experimental study on the truncated long code sequence for u...

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International Conference on BioMedical Engineering and Informatics (BMEI)

作者： Zhengdi Qin Deqing Liu Siping Chen National-Regional Key Technology Engineering Laboratory of China for Medical Ultrasound Guangdong Provincial Key Laboratory of Biomedical Information Detection and Ultrasound Imaging Department of Biomedical Engineering School of Medicine Shenzhen University Shenzhen China

When applying the coded transmission technique into the pulsed-echo ultrasound system one of the big problems is the limited time frame for the coding sequence to be feed into the pulse-echo duration. Generally, only very short code sequence could be modulated in each transmitted pulse especially in the medical ultrasound system. Due to the poor correlation property of such kind of short code and the nonlinear field attenuation in the ultrasound propagation, the coding result is far from satisfaction. We have presented a truncated long code scheme for the ultrasound Doppler detection [1] [2]. The time duration to be considered for the selection of the length of the code sequence is extended to be as long as the spectrum estimation window allows. Long code sequence modulation can be applied in the pulse-echo system. The long code is first truncated into many short segments and each segment is used for each pulse modulation. Then, the returned signals from the multiple segments are coherently combined for the Doppler detection. The coding effect with a long code gives a good appearance in the process with its good correlation property, which gives solid backup for the field compensation. Some water tank experiments are shown in this paper.

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Research on infrared Computational Multispectral imaging technology Based on Coding Mask 9

Research on Infrared Computational Multispectral Imaging Tec...

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9th Symposium on Novel Photoelectronic detection technology and Applications

作者： Li, Dapeng Zhou, Weiwen Liu, Sha Wu, Jianrong Zhang, Xiaotong Shanghai Aerospace Control Technology Institute No.1555 Zhongchun Road Minhang District Shanghai201109 China Shanghai Academy of Spaceflight Technology No.3888 Yuanjiang Road Minhang District Shanghai201109 China Infrared Detection Technology Research & Development Center CASC No.1555 Zhongchun Road Minhang District Shanghai201109 China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Science Shanghai201800 China

ISBN: (纸本)9781510664432

Limited by the current technological development level of infrared detectors, it is difficult for the infrared multispectral imaging systems to meet the requirements of practical engineering application indicators such as low structural complexity and high transmittance at the same time. In order to promote the engineering application level of computational imaging technology in the infrared spectrum, this paper proposes a snapshot computational spectral imaging technology scheme based on reflective coding mask;this scheme utilizes the built-in reflective coding mask in traditional imaging system: Firstly, complete the design and molding of the coding mask according to the index requirements, complete the information calibration of the coding mask in the spatial dimension and the spectral dimension by building a high-precision spectral calibration module, and then combine the compressive sensing image restoration algorithm according to the calibration results, finally realize the imaging and spectral data extraction of targets. laboratory indoor imaging shows that this scheme can realize broad-spectrum imaging of indoor targets and extraction of multi-spectral information of targets. Compared with the technical scheme of traditional optical filter and grating infrared spectrometer, it has the technical advantages of simple structure and high transmittance. © 2023 SPIE.

关键词： Compressed sensing

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Multidisciplinary and multiscale nanoscience research roadmap based on large scientific facilities

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Science China Chemistry 2024年第8期67卷 2497-2523页

作者： Yuan Zeng Shuhan Zhang Yuecong Guo Yalin Cong Xu Ding Peihua Li Yunxiang Lin Wenzhi Ren Hui Su Weigang Sun Liuxin Xu Guikai Zhang Shihua Chen Yu Chen Weiren Cheng Shengqi Chu Yong Guan Jinru Han Jie Lin Hengjie Liu Zheyi Liu Pan Luo Fanchun Meng Sicong Qiao Zongyin Song Ying Wang Zhao Wu Chenyu Yang Meng Yang Shirui Yang Zi Yin Zhibin Yin Pengjun Zhang Hongyu Zhang Pingping Zheng Jia Zhou Wanlin Zhou Pengfei An He Cheng Chunhai Fan Xingjiu Huang Yong Lei Lina Li Mu Li Qinghua Liu Shuming Peng Li Song Zhihu Sun Yangchao Tian Fangjun Wang Lihua Wang Liming Wang Shiqiang Wei Aiguo Wu Chunlei Xiao Xueming Yang Panchao Yin Jing Zhang Mingxin Zhang Yaling Wang Chunying Chen CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety New Cornerstone Science LaboratoryNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Institute of Solid State Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology Zhejiang International Cooperation Base of Biomedical Materials Technology and ApplicationCAS Key Laboratory of Magnetic Materials and DevicesNingbo Cixi Institute of Biomedical EngineeringZhejiang Engineering Research Center for Biomedical MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081China State Key Laboratory of Luminescent Materials and Devices South China Advanced Institute for Soft Matter Science and TechnologySouth China University of TechnologyGuangzhou 510640China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Separation Sciences for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of Advanced Science Facilities Shenzhen 518107China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Acade

With the advancement of modern science and technology, large scientific facilities are increasingly oriented toward demand and application, and can be used for basic research as well as serving multiple disciplines. Developing large scientific facilities and related analytical technologies enhances understanding of large scientific facilities and popularizes their application in research across multiple disciplines. The combination of light or neutron sources from large scientific facilities and advanced analytical technologies can be achieved for materials structure information, dynamics study of chemical reactions, high dissociation of biomolecules, 3D visualization of energy materials or biological samples, etc. We first introduce the progress of domestic large scientific facilities of synchrotron radiation(SR) and free electron lasers(FELs) with different wavelengths and neutron *** further discuss the comparison between Chinese and typical foreign facilities in X-ray radiation from X-ray tubes, synchrotrons, X-ray FELs, and neutron sources based on physical parameters of light and neutron sources. In addition, we focus on the technological progress and perspectives combined with advanced X-ray radiation and neutron sources of large scientific facilities in China, especially in the nanoscience fields of energy catalysis and biological science. We hope that this roadmap will provide references on technology and methods to experimental users, as well as prospects for future development of technologies based on large research infrastructure facilities. Comprehensive studies and guidelines for basic research to practical application in various disciplines can be made with the assistance of large scientific facilities.

关键词： large scientific facilities synchrotron radiation FEL light sources neutron sources spectroscopic analysis methods X-ray imaging techniques structural information chemical dynamics

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A Time Delay Estimation Method Based on Linear Frequency-modulated Continuous Wave Signal

A Time Delay Estimation Method Based on Linear Frequency-mod...

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第34届中国控制与决策会议

作者： Xuemei Li Chunyang Wang Xuelian Liu School of Electronic and Information Engineering Changchun University of Science and Technology School of Mechanical and Control Engineering Baicheng Normal University Xi'an Key Laboratory of Active Photoelectric Imaging Detection Technology

This paper proposes a time delay estimation(TDE) method of linear frequency-modulated continuous wave(LFMCW) signal based on synchroextracting S transform via the Hough transform(SESTH).Asynchroextracting S transform(SEST) can be used to accurately extract the linear time-frequency *** the Hough transform is integrated into the SEST model to construct an SESTH model,the formula for the initial frequency and the frequency modulation rate of the Chirp signal are inferred to form a TDE *** proposed method can also effectively eliminate divergent energy of the time-frequency S transform(ST) distribution,significantly improve the time-frequency concentration and reduce the effect of noise on the TDE of LFMCW *** effectiveness of the proposed method is verified by simulation and data analysis.

关键词： SESTH Transform Time Delay Estimation LFMCW Signal and Time-frequency Concentration

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Pseudo Dual Energy CT imaging using Deep Learning Based Framework: Initial Study

arXiv

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arXiv 2017年

作者： Li, Sui Wang, Yongbo Liao, Yuting He, Ji Zeng, Dong Bian, Zhaoying Ma, Jianhua Department of Biomedical Engineering Southern Medical University Guangzhou Guangdong510515 China Guangzhou Key Laboratory of Medical Radiation Imaging and Detection Technology Guangzhou510515 China

Dual energy computed tomography (DECT) has become of particular interest in clinic recent years. The DECT scan comprises two images, corresponding to two photon attenuation coefficients maps of the objects. Meanwhile, the DECT images are less accessible sometimes, compared to the conventional single energy CT (SECT). This motivates us to simulate pseudo DECT (pDECT) images from the SECT images. Inspired by recent advances in deep learning, we present a deep learning based framework to yield pDECT images from SECT images, utilizing the intrinsic characteristics underlying DECT images, i.e., global correlation and high similarity. To demonstrate the performance of the deep learning based framework, a cascade deep ConvNet (CD-ConvNet) approach is specifically presented in the deep learning framework. In the training step, the CD-ConvNet is designed to learn the non-linear mapping from the measured energy-specific (i.e., low-energy) CT images to the desired energy-specific (i.e., high-energy) CT images. In the testing step, the trained CD-ConvNet can be used to yield desired high-energy CT images from the low-energy CT images, and then produce accurate basic material maps. Clinical patient data were employed to validate and evaluate the presented CD-ConvNet approach performance. Both visual and quantitative results demonstrate the presented CD-ConvNet approach can yield high quality pDECT images and basic material maps. Copyright © 2017, The Authors. All rights reserved.

关键词： Computerized tomography

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Study on the geometric characteristics of micro-seam stitching detectors

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Zhongguo Jiguang/Chinese Journal of Lasers 2014年第S1期41卷

作者： Gong, Xueyi Chen, Fansheng Su, Xiaofeng Huang, Sijie Liu, Qiang Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China Key Laboratories of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China

The geometric parameters acquisition of splice detector is the most important thing to validate and evaluate the success of splice, but there is no systematic approach to solve it. For the rotation between the two detectors, the translation of the vertical slit, the slit width and other geometric parameters, the method based on imaging can give very accurate results. On the other hand, the smart-scope can give us the actual mean width of detector splicing, and the results are similar to the above. It proves that the method based on imaging can complete various geometric parameters tests with a very high precision. It just meets the needs of easy and high precision of the aerospace application, and it can provide powerful technical support for the detector slit splicing.

关键词： Aerospace applications

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Ring-pendulum Double-sided Polisher with Improved Super Twisting Sliding Mode Active Disturbance Rejection Control

Ring-pendulum Double-sided Polisher with Improved Super Twis...

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第34届中国控制与决策会议

作者： Shuning Liang Bo Xiao Chunyang Wang Zishuo Wang Lin Wang School of Electronic and Information Engineering Changchun University of Science and Technology Xi'an Key Laboratory of Active Photoelectric Imaging Detection Technology Xi'an Technological University School of Optoelectronic Engineering Xi'an Technological University

To achieve fast,accurate,and stable rotation speed control for the ring-pendulum double-sided polisher(RDP),this paper proposes an improved super twisting sliding mode active disturbance rejection control(ISTSMADRC) method for *** method increases the disturbance rejection ability of the system through the extended state observer of the ***,the super twisting sliding mode(STSM) control is improved by the boundary layer method,and the ISTSM control law replaces the error feedback control law of the ADRC controller,then the response speed of system is *** performance of controller is analyzed by step response test,tracking performance test,and robustness *** results show that the ISTSMADRC controller has fast response speed,high control accuracy,good tracking performance,and strong robustness.

关键词： Ring-pendulum double-sided polisher Improved super twisting sliding mode Active disturbance rejection control System stability analysis

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