2024
2024
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Record 241 of
Title:Multi-Dimensional Fusion of Spectral and Polarimetric Images Followed by Pseudo-Color Algorithm Integration and Mapping in HSI Space
Author Full Names:Guo, Fengqi; Zhu, Jingping; Huang, Liqing; Li, Feng; Zhang, Ning; Deng, Jinxin; Li, Haoxiang; Zhang, Xiangzhe; Zhao, Yuanchen; Jiang, Huilin; Hou, XunSource Title:REMOTE SENSINGLanguage:EnglishDocument Type:ArticleKeywords Plus:ANOMALY DETECTION; POLARIZATION; COLOR; SEPARATIONAbstract:Spectral-polarization imaging technology plays a crucial role in remote sensing detection, enhancing target identification and tracking capabilities by capturing both spectral and polarization information reflected from object surfaces. However, the acquisition of multi-dimensional data often leads to extensive datasets that necessitate comprehensive analysis, thereby impeding the convenience and efficiency of remote sensing detection. To address this challenge, we propose a fusion algorithm based on spectral-polarization characteristics, incorporating principal component analysis (PCA) and energy weighting. This algorithm effectively consolidates multi-dimensional features within the scene into a single image, enhancing object details and enriching edge features. The robustness and universality of our proposed algorithm are demonstrated through experimentally obtained datasets and verified with publicly available datasets. Additionally, to meet the requirements of remote sensing tracking, we meticulously designed a pseudo-color mapping scheme consistent with human vision. This scheme maps polarization degree to color saturation, polarization angle to hue, and the fused image to intensity, resulting in a visual display aligned with human visual perception. We also discuss the application of this technique in processing data generated by the Channel-modulated static birefringent Fourier transform imaging spectropolarimeter (CSBFTIS). Experimental results demonstrate a significant enhancement in the information entropy and average gradient of the fused image compared to the optimal image before fusion, achieving maximum increases of 88% and 94%, respectively. This provides a solid foundation for target recognition and tracking in airborne remote sensing detection.Addresses:[Guo, Fengqi; Zhu, Jingping; Li, Feng; Deng, Jinxin; Li, Haoxiang; Zhang, Xiangzhe; Zhao, Yuanchen; Hou, Xun] Xi An Jiao Tong Univ, Minist Educ, Key Lab Phys Elect & Devices, Shaanxi Key Lab Informat Photon Tech, Xian 710049, Peoples R China; [Guo, Fengqi; Huang, Liqing] Xi An Jiao Tong Univ, Sch Phys, Minist Educ, Key Lab,Non Equilibrium Condensed Matter & Quantum, Xian 710049, Peoples R China; [Zhang, Ning] Xian Inst Opt & Precis Mech CAS, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China; [Jiang, Huilin] Changchun Univ Sci & Technol, Natl & Local Joint Engn Res Ctr Space Optoelect Te, Changchun 130022, Peoples R ChinaAffiliations:Xi'an Jiaotong University; Xi'an Jiaotong University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Changchun University of Science & TechnologyPublication Year:2024Volume:16Issue:7Article Number:1119DOI Link:http://dx.doi.org/10.3390/rs16071119數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001201154500001 -
Record 242 of
Title:Memory deficit in patients with cerebral small vessel disease: evidence from eye tracking technology
Author Full Names:Huang, Kailing; Zhao, Tingting; Sun, Weifeng; Feng, Li; Wang, Quan; Feng, JieSource Title:CEREBRAL CORTEXLanguage:EnglishDocument Type:ArticleKeywords Plus:WORKING-MEMORY; ATTENTIONAbstract:Cerebral small vessel disease is the one of the most prevalent causes of vascular cognitive impairment. We aimed to find objective and process-based indicators related to memory function to assist in the detection of memory impairment in patients with cerebral small vessel disease. Thirty-nine cerebral small vessel disease patients and 22 healthy controls were invited to complete neurological examinations, neuropsychological assessments, and eye tracking tasks. Eye tracking indicators were recorded and analyzed in combination with imaging features. The cerebral small vessel disease patients scored lower on traditional memory task and performed worse on eye tracking memory task performance compared to the healthy controls. The cerebral small vessel disease patients exhibited longer visit duration and more visit count within areas of interest and targets and decreased percentage value of total visit duration on target images to total visit duration on areas of interest during decoding stage among all levels. Our results demonstrated the cerebral small vessel disease patients performed worse in memory scale and eye tracking memory task, potentially due to their heightened attentional allocation to nontarget images during the retrieval stage. The eye tracking memory task could provide process-based indicators to be a beneficial complement to memory assessment and new insights into mechanism of memory impairment in cerebral small vessel disease patients.Addresses:[Huang, Kailing; Zhao, Tingting; Feng, Li; Feng, Jie] Cent South Univ, Dept Neurol, Xiangya Hosp, 87 Xiangya Rd, Changsha 410008, Hunan, Peoples R China; [Huang, Kailing; Zhao, Tingting; Feng, Li; Feng, Jie] Cent South Univ, Xiangya Hosp, Natl Clin Res Ctr Geriatr Disorders, 87 Xiangya Rd, Changsha 410008, Hunan, Peoples R China; [Sun, Weifeng; Wang, Quan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Biomed Spect Xian, 17 Informat Ave,New Ind Pk, Xian 710119, Shaanxi, Peoples R China; [Sun, Weifeng; Wang, Quan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol, 17 Informat Ave,New Ind Pk, Xian 710119, Shaanxi, Peoples R China; [Sun, Weifeng] Univ Chinese Acad Sci, 1 Yanqihu East Rd, Beijing 101408, Peoples R ChinaAffiliations:Central South University; Central South University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CASPublication Year:2024Volume:34Issue:4Article Number:bhae138DOI Link:http://dx.doi.org/10.1093/cercor/bhae138數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001200282000008 -
Record 243 of
Title:Optimizing centroiding using indexed table lookup: Application to crossed-strip readout
Author Full Names:La, An-Peng; Zhang, Wen-Wen; Yang, Yang; Zheng, Jin-Kun; Bai, Yong-Lin; Song, Yu-Chao; Duan, Jin-Yao; Zhang, Yanxin; Wang, Fang; Zhao, HuaSource Title:AIP ADVANCESLanguage:EnglishDocument Type:ArticleKeywords Plus:HIGH-RESOLUTION; ALGORITHMSAbstract:This paper introduces a hybrid readout system for a cross-strip position-sensitive anode detector that combines a lookup table and weighted averaging. The lookup table approach is used to identify event channels and select appropriate weights based on the corresponding index code for calculating the centroid of the electron cloud. This effectively enhances the readout system's processing speed while preserving the high-resolution advantage of the cross-strip position-sensitive anode. Simulations were performed to evaluate the performance of the system. Experimental results demonstrate that this readout method achieves an event processing speed exceeding 10 MHz while maintaining a resolution of 17.96 lp/mm.Addresses:[La, An-Peng; Zhang, Wen-Wen; Song, Yu-Chao] Xian Univ Posts & Telecommun, Xian 710121, Peoples R China; [Yang, Yang; Zheng, Jin-Kun; Bai, Yong-Lin; Duan, Jin-Yao] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOPM, Key Lab Ultra Fast Photoelect Diagnost Technol, Xian 710119, Peoples R China; [Yang, Yang] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China; [Duan, Jin-Yao] Univ Chinese Acad Sci CAS, Beijing 100049, Peoples R China; [Zhang, Yanxin; Wang, Fang; Zhao, Hua] Beijing Inst Tracking & Telecommun Technol, Beijing 100049, Peoples R ChinaAffiliations:Xi'an University of Posts & Telecommunications; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Shanxi University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CASPublication Year:2024Volume:14Issue:4Article Number:45103DOI Link:http://dx.doi.org/10.1063/5.0186696數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001194710300005 -
Record 244 of
Title:Sub-50 fs pulses generation from an all-fiber monolithic gain-managed nonlinear amplifier with CFBG-based pre-compressor
Author Full Names:Li, Qianglong; Li, Feng; Liu, Hongjun; Zhao, Wei; Cao, Xue; Zhao, Hualong; Wang, Yishan; Wen, Wenlong; Si, JinhaiSource Title:LASER PHYSICS LETTERSLanguage:EnglishDocument Type:ArticleKeywords Plus:PARABOLIC PULSES; AMPLIFICATION; POWER; EVOLUTIONAbstract:We demonstrate an all-fiber monolithic laser source from a gain-managed nonlinear (GMN) fiber amplifier with a CFBG-based pre-compressor that generates high-contrast pulses with a repetition rate of 80 MHz, average power of 1.6 W, and pulse duration of sub-50 fs. The compressed pulse quality can be optimized by tuning the parameters of the seed pulses injected into the GMN amplifier by controlling the pump power of the fiber pre-amplifier. This compact and cost-effective laser system is a simplified design of the GMN amplification-based femtosecond fiber laser systems. With alignment-free characteristics in the amplifiers and clean compressed pulses, it is easy to assemble and use in applications such as multi-photon microscopy.Addresses:[Li, Qianglong; Li, Feng; Liu, Hongjun; Zhao, Wei; Cao, Xue; Zhao, Hualong; Wang, Yishan; Wen, Wenlong] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China; [Li, Qianglong; Cao, Xue; Si, Jinhai] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China; [Li, Qianglong; Cao, Xue] Univ Chinese Acad Sci, Beijing 100049, Peoples R ChinaAffiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics; Xi'an Jiaotong University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CASPublication Year:2024Volume:21Issue:4Article Number:45101DOI Link:http://dx.doi.org/10.1088/1612-202X/ad291f數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001169188100001 -
Record 245 of
Title:Temperature Measurement Method for Small Target Medium-Wave Infrared Spectral Radiation Based on Distance Correction
Author Full Names:Li Wen-kai; Zhou Liang; Liu Zhao-hui; Cui Kai; Liu Kai; Li Zhi-guo; Xie Mei-linSource Title:SPECTROSCOPY AND SPECTRAL ANALYSISLanguage:ChineseDocument Type:ArticleAbstract:For long-distance space targets moving at high speeds, temperature is one of the important parameters to characterize their working state and performance. Accurately obtaining the temperature of the target has an important reference value for judging its motion state and predicting its situation development. At present, the commonly used processing method of surface target or point target is no longer applicable to the measurement of the radiation characteristics of small targets. At the same time, spectral detection increases the distinguishable information of the target in the wavelength dimension, which can accurately obtain the distribution of the target energy with wavelength, providing a possibility for the inversion of the target temperature, and has great application potential. The slitless spectrometer can reduce the requirements for tracking and stabilization accuracy of space targets, has the characteristics of simple structure, high frame rate and fast response speed, and has high application value in astronomical observation and spacecraft observation. In this paper, we analyzed the spectral calibration model of target infrared radiation characteristic measurement and determined the main parameters in the linear response model of infrared detector pixels. In order to reduce the influence of imaging distance on temperature measurement accuracy, we proposed a target temperature inversion model based on distance correction. The improved temperature measurement accuracy meets the accuracy requirements in practical engineering applications and greatly affects infrared radiation spectrum temperature measurement. Certain guiding significance.Addresses:[Li Wen-kai; Zhou Liang; Liu Zhao-hui; Cui Kai; Liu Kai; Li Zhi-guo; Xie Mei-lin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Li Wen-kai] Univ Chinese Acad Sci, Beijing 100049, Peoples R ChinaAffiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CASPublication Year:2024Volume:44Issue:4Start Page:1158End Page:1164DOI Link:http://dx.doi.org/10.3964/j.issn.1000-0593(2024)04-1158-07數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001212393800037 -
Record 246 of
Title:Studying the Effects and Competitive Mechanisms of YOYO-1 on the Binding Characteristics of DOX and DNA Molecules Based on Surface-Enhanced Raman Spectroscopy and Molecular Docking Techniques
Author Full Names:Li, Yanjie; Li, Zhiwei; Yun, Penglun; Sun, Dan; Niu, Yong; Yao, Baoli; Wang, KaigeSource Title:INTERNATIONAL JOURNAL OF MOLECULAR SCIENCESLanguage:EnglishDocument Type:ArticleKeywords Plus:CALF THYMUS DNA; FT-RAMAN; SERS; DOXORUBICIN; SUBSTRATE; KINETICS; COMPLEX; IRAbstract:Revealing the interaction mechanisms between anticancer drugs and target DNA molecules at the single-molecule level is a hot research topic in the interdisciplinary fields of biophysical chemistry and pharmaceutical engineering. When fluorescence imaging technology is employed to carry out this kind of research, a knotty problem due to fluorescent dye molecules and drug molecules acting on a DNA molecule simultaneously is encountered. In this paper, based on self-made novel solid active substrates NpAA/(ZnO-ZnCl2)/AuNPs, we use a surface-enhanced Raman spectroscopy method, inverted fluorescence microscope technology, and a molecular docking method to investigate the action of the fluorescent dye YOYO-1 and the drug DOX on calf thymus DNA (ctDNA) molecules and the influencing effects and competitive relationships of YOYO-1 on the binding properties of the ctDNA-DOX complex. The interaction sites and modes of action between the YOYO-1 and the ctDNA-DOX complex are systematically examined, and the DOX with the ctDNA-YOYO-1 are compared, and the impact of YOYO-1 on the stability of the ctDNA-DOX complex and the competitive mechanism between DOX and YOYO-1 acting with DNA molecules are elucidated. This study has helpful experimental guidance and a theoretical foundation to expound the mechanism of interaction between drugs and biomolecules at the single-molecule level.Addresses:[Li, Yanjie; Li, Zhiwei; Yun, Penglun; Sun, Dan; Niu, Yong; Wang, Kaige] Northwest Univ, Inst Photon & Photon Technol, Natl Ctr Int Res Photoelect Technol & Nanofunct Ma, Key Lab Photoelect Technol Shaanxi Prov, Xian 710127, Peoples R China; [Yao, Baoli] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R ChinaAffiliations:Northwest University Xi'an; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & PhotonicsPublication Year:2024Volume:25Issue:7Article Number:3804DOI Link:http://dx.doi.org/10.3390/ijms25073804數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001201015200001 -
Record 247 of
Title:Observation of the colliding process of plasma jets in the double-cone ignition scheme using an x-ray streak camera
Author Full Names:Liu, Zhengdong; Wu, Fuyuan; Zhang, Yapeng; Yuan, Xiaohui; Zhang, Zhe; Xu, Xiangyan; Xue, Yanhua; Tian, Jinshou; Zhong, Jiayong; Zhang, JieSource Title:PHYSICS OF PLASMASLanguage:EnglishDocument Type:ArticleKeywords Plus:RAYLEIGH-TAYLOR INSTABILITY; FUSION; DRIVE; GROWTH; IMPLOSIONS; GAINAbstract:The double-cone ignition scheme is a novel approach with the potential to achieve a high gain fusion with a relatively smaller drive laser energy. To optimize the colliding process of the plasma jets formed by the CHCl/CD shells embedded in the gold cones, an x-ray streak camera was used to capture the spontaneous x-ray emission from the CHCl and CD plasma jets. High-density plasma jets with a velocity of 220 +/- 25 km/s are observed to collide and stagnate, forming an isochoric plasma with sharp ends. During the head-on colliding process, the self-emission intensity nonlinearly increases because of the rapid increase in the density and temperature of the plasma jets. The CD colliding plasma exhibited stronger self-emission due to its faster implosion process. These experimental findings effectively agree with the two-dimensional fluid simulations.Addresses:[Liu, Zhengdong; Zhang, Yapeng; Zhong, Jiayong] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; [Liu, Zhengdong; Zhang, Yapeng; Zhong, Jiayong] Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China; [Wu, Fuyuan; Yuan, Xiaohui; Zhang, Jie] Shanghai Jiao Tong Univ, MoE, Key Lab Laser Plasmas, Shanghai 200240, Peoples R China; [Wu, Fuyuan; Yuan, Xiaohui; Zhang, Jie] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China; [Wu, Fuyuan; Yuan, Xiaohui; Zhang, Zhe; Zhong, Jiayong; Zhang, Jie] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China; [Zhang, Zhe; Zhang, Jie] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China; [Zhang, Zhe] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China; [Xu, Xiangyan; Xue, Yanhua; Tian, Jinshou] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R ChinaAffiliations:Beijing Normal University; Beijing Normal University; Shanghai Jiao Tong University; Shanghai Jiao Tong University; Shanghai Jiao Tong University; Chinese Academy of Sciences; Institute of Physics, CAS; Songshan Lake Materials Laboratory; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CASPublication Year:2024Volume:31Issue:4Article Number:42704DOI Link:http://dx.doi.org/10.1063/5.0188056數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001196796800001 -
Record 248 of
Title:Radiative Transfer Characteristics of the 1.27 μm O2 (a1 Δg) Airglow in Limb-Viewing
Author Full Names:Wang Dao-qi; Wang Hou-mao; He Wei-wei; Hu Xiang-rui; Li Juan; Li Fa-quan; Wu Kui-junSource Title:SPECTROSCOPY AND SPECTRAL ANALYSISLanguage:ChineseDocument Type:ArticleKeywords Plus:ATMOSPHERIC BAND; TEMPERATURE; RETRIEVAL; EMISSIONAbstract:Because the 1.27 mu m O-2 (a(1) Delta(g)) airglow radiation has the advantages of strong radiation signal, large space span and weak self-absorption effect, it is an important target source for near-space atmospheric remote sensing. In addition, it has important scientific significance and application value, such as research on the dynamics and thermal characteristics of the middle and upper atmosphere, global greenhouse gas detection, and three-dimensional tomography of ozone concentration. Firstly, based on the photochemical model of O-2 (a(1) Delta(g)), the generation and annihilation mechanisms of O-2 (a(1) Delta(g)) airglow were studied. The volume emission rate profile of O-2 (a(1) Delta(g)) airglow was calculated on this basis. Based on the spectral intensity and Einstein coefficients given by HITRAN, two methods for calculating the spectral distribution of O-2 (a(1) Delta(g)) airglow were proposed. Using the latest molecular spectral parameters, photochemical reaction rate constant and F10.7 solar ultraviolet flux, combined with the volume emission rate profile information of O-2 (a(1) Delta(g)) airglow calculated by photochemical reaction model. The radiative transfer theoretical model of the 1.27 mu m O-2 (a(1) Delta(g)) airglow in limb-viewing was developed by using a line-by-line integration algorithm. The influence of the self-absorption effect on the spectral intensity of airglow radiation at different tangent heights is analyzed. Then, the O-2 (a(1) Delta(g)) airglow radiation spectrum of the target layer is obtained by processing the airglow radiation of the O-2 molecule near the infrared atmospheric band measured by scanning imaging absorption spectrometer for atmospheric chartography (SCIAMACHY) under the limb-viewing by onion peeling algorithm. Spectral integration algorithm is used to retrieve the volume emission rate profile of O-2 (a(1) Delta(g)) airglow. Finally, the reliability and rationality of the radiative transfer theoretical model of the 1.27 mu m O-2 (a(1) Delta(g)) airglow in limb-viewing is verified by comparing the radiation spectrum and the volume emission rate profile obtained from the theoretical calculation and retrieval of the SCIAMACHY instrument. Regarding the comparison results, factors that contribute to the limb radiation intensity and volume emission rate of O-2 (a(1) Delta(g)) airglow are analyzed. Analyses show that theoretical calculations agree with measured satellite results in the altitude region above 50 km. However, the deviation between the two increases gradually with the decrease of altitude because the satellite remote sensing in the middle and low altitude regions are seriously affected by the self-absorption effect and atmospheric scattering effect in limb-viewing. Additionally, compared with the spectral line intensity parameter given by the HITRAN database, the O-2 (a(1) Delta(g)) airglow limb radiation model based on Einstein coefficients is more consistent with the measured satellite results. Establishing the radiative transfer theoretical model of the 1. 27 mu m O-2 (a(1) Delta(g)) airglow in limb-viewing provides a theoretical foundation for atmospheric remote sensing in near space.Addresses:[Wang Dao-qi; He Wei-wei; Hu Xiang-rui; Wu Kui-jun] Yantai Univ, Sch Phys & Elect Informat, Yantai 264005, Peoples R China; [Wang Hou-mao] Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China; [Li Juan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Li Fa-quan] Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, Wuhan 430071, Peoples R ChinaAffiliations:Yantai University; Chinese Academy of Sciences; National Space Science Center, CAS; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; Innovation Academy for Precision Measurement Science & Technology, CASPublication Year:2024Volume:44Issue:4Start Page:1088End Page:1097DOI Link:http://dx.doi.org/10.3964/j.issn.1000-0593(2024)04-1088-10數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001212393800028 -
Record 249 of
Title:Fusion of Hyperspectral and Multispectral Images with Radiance Extreme Area Compensation
Author Full Names:Wang, Yihao; Chen, Jianyu; Mou, Xuanqin; Chen, Tieqiao; Chen, Junyu; Liu, Jia; Feng, Xiangpeng; Li, Haiwei; Zhang, Geng; Wang, Shuang; Li, Siyuan; Liu, YupengSource Title:REMOTE SENSINGLanguage:EnglishDocument Type:ArticleKeywords Plus:NONNEGATIVE MATRIX FACTORIZATION; LOW-RANK; DECOMPOSITION; NETWORK; MSAbstract:Although the fusion of multispectral (MS) and hyperspectral (HS) images in remote sensing has become relatively mature, and different types of fusion methods have their own characteristics in terms of fusion effect, data dependency, and computational efficiency, few studies have focused on the impact of radiance extreme areas, which widely exist in real remotely sensed scenes. To this end, this paper proposed a novel method called radiance extreme area compensation fusion (RECF). Based on the architecture of spectral unmixing fusion, our method uses the reconstruction of error map to construct local smoothing constraints during unmixing and utilizes the nearest-neighbor multispectral data to achieve optimal replacement compensation, thereby eliminating the impact of overexposed and underexposed areas in hyperspectral data on the fusion effect. We compared the RECF method with 11 previous published methods on three sets of airborne hyperspectral datasets and HJ2 satellite hyperspectral data and quantitatively evaluated them using 5 metrics, including PSNR and SAM. On the test dataset with extreme radiance interference, the proposed RECF method achieved well in the overall evaluation results; for instance, the PSNR metric reached 47.6076 and SAM reached 0.5964 on the Xiong'an dataset. In addition, the result shows that our method also achieved better visual effects on both simulation and real datasets.Addresses:[Wang, Yihao; Chen, Tieqiao; Chen, Junyu; Liu, Jia; Feng, Xiangpeng; Li, Haiwei; Zhang, Geng; Wang, Shuang; Li, Siyuan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Wang, Yihao; Mou, Xuanqin] Xi An Jiao Tong Univ, Inst Image Proc & Pattern Recognit, Sch Informat & Commun Engn, Xian 710049, Peoples R China; [Wang, Yihao; Chen, Tieqiao; Chen, Junyu; Liu, Jia] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Yihao; Chen, Jianyu; Liu, Jia] Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Peoples R China; [Liu, Jia; Liu, Yupeng] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Peoples R ChinaAffiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Xi'an Jiaotong University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Ministry of Natural Resources of the People's Republic of China; Second Institute of Oceanography, Ministry of Natural Resources; Chinese Academy of Sciences; South China Sea Institute of Oceanology, CASPublication Year:2024Volume:16Issue:7Article Number:1248DOI Link:http://dx.doi.org/10.3390/rs16071248數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001201021000001 -
Record 250 of
Title:Modeling of 1.7 μm and 2.4 μm Dual-Wavelength Pumped 4.3 μm Dysprosium-Doped Chalcogenide Fiber Lasers
Author Full Names:Xiao, Yang; Cui, Jian; Xiao, Xusheng; Xu, Yantao; Guo, HaitaoSource Title:IEEE JOURNAL OF QUANTUM ELECTRONICSLanguage:EnglishDocument Type:ArticleKeywords Plus:MIDINFRARED EMISSION; BRILLOUIN LASER; LOW-THRESHOLDAbstract:A novel 1.7 mu m and 2.4 mu m dual-wavelength pumping scheme for a 4.3 mu m dysprosium (Dy3+)-doped chalcogenide fiber laser was theoretically demonstrated. It was attributed to the 2.4 mu m excited stated absorption (ESA, H-6(13/2 -> )6 H(9/2 , )(6)F(11/2 )transition). Theoretically, when the two pumps were 5 W and 2 W, respectively, a laser power of 1.5 W with an remarkable efficiency of 30.2% was obtained from the home-made Dy3+:Ga0.8As34.2Sb5S60 glass fiber with a loss coefficient of 3 dB/m and a Dy3+ concentration of 3.67 x 10(25) ions/m3. Results indicated that the dual-wavelength pumping scheme based on the gain fiber provides a potential way to 4.3 mu m dysprosium-doped chalcogenide fiber lasers.Addresses:[Xiao, Yang; Cui, Jian; Xiao, Xusheng; Xu, Yantao; Guo, Haitao] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOM, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Xiao, Yang; Cui, Jian; Xiao, Xusheng; Xu, Yantao; Guo, Haitao] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R ChinaAffiliations:State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CASPublication Year:2024Volume:60Issue:2Article Number:1600106DOI Link:http://dx.doi.org/10.1109/JQE.2024.3350688數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001177581500001 -
Record 251 of
Title:Alternating projection combined with fast gradient projection (FGP-AP) method for intensity-only measurement optical diffraction tomography in LED array microscopy
Author Full Names:Yang, Zewen; Zhang, Lu; Liu, Tong; Wang, Huijun; Tang, Zhiyuan; Zhao, Hong; Yuan, Li; Zhang, Zhenxi; Liu, XiaolongSource Title:BIOMEDICAL OPTICS EXPRESSLanguage:EnglishDocument Type:ArticleKeywords Plus:MULTIPLE-SCATTERING MODEL; RECONSTRUCTION; FIELD; ALGORITHMS; INVERSION; LIMITAbstract:Optical diffraction tomography (ODT) is a powerful label -free measurement tool that can quantitatively image the three-dimensional (3D) refractive index (RI) distribution of samples. However, the inherent missing cone problem, limited illumination angles, and dependence on intensity -only measurements in a simplified imaging setup can all lead to insufficient information mapping in the Fourier domain, affecting 3D reconstruction results. In this paper, we propose the alternating projection combined with the fast gradient projection (FGP-AP) method to compensate for the above problem, which effectively reconstructs the 3D RI distribution of samples using intensity -only images captured from LED array microscopy. The FGP-AP method employs the alternating projection (AP) algorithm for gradient descent and the fast gradient projection (FGP) algorithm for regularization constraints. This approach is equivalent to incorporating prior knowledge of sample non -negativity and smoothness into the 3D reconstruction process. Simulations demonstrate that the FGP-AP method improves reconstruction quality compared to the original AP method, particularly in the presence of noise. Experimental results, obtained from mouse kidney cells and label -free blood cells, further affirm the superior 3D imaging efficacy of the FGP-AP method. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing AgreementAddresses:[Yang, Zewen; Zhang, Lu; Liu, Tong; Wang, Huijun; Zhao, Hong] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China; [Zhang, Lu] Xi An Jiao Tong Univ, Sch Instrument Sci & Technol, Xian 710049, Peoples R China; [Tang, Zhiyuan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Yuan, Li] Xi An Jiao Tong Univ, Affiliated Hosp 1, Xian 710049, Peoples R China; [Zhang, Zhenxi] Xi An Jiao Tong Univ, Key Lab Biomed Informat Engn, Minist Educ, Xian 710049, Peoples R China; [Liu, Xiaolong] Fujian Med Univ, United Innovat Mengchao Hepatobiliary Technol Key, Mengchao Hepatobiliary Hosp, Fuzhou 350025, Peoples R ChinaAffiliations:Xi'an Jiaotong University; Xi'an Jiaotong University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Xi'an Jiaotong University; Xi'an Jiaotong University; Fujian Medical UniversityPublication Year:2024Volume:15Issue:4Start Page:2524End Page:2542DOI Link:http://dx.doi.org/10.1364/BOE.518955數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001256335800001 -
Record 252 of
Title:Inverse Calculation and Regularization Process for the Solar Aspect System (SAS) of HXI Payload on ASO-S Spacecraft
Author Full Names:Yu, Ji-Rui; Ruan, Ping; Su, Yang; He, Ying-Hong; Tao, Jin-You; Zhang, Zhe; Guo, Song; Xue, Bin; Yang, Jian-FengSource Title:RESEARCH IN ASTRONOMY AND ASTROPHYSICSLanguage:EnglishDocument Type:ArticleKeywords Plus:ILL-POSED PROBLEMS; TIKHONOV REGULARIZATION; ONBOARDAbstract:For the ASO-S/HXI payload, the accuracy of the flare reconstruction is reliant on important factors such as the alignment of the dual grating and the precise measurement of observation orientation. To guarantee optimal functionality of the instrument throughout its life cycle, the Solar Aspect System (SAS) is imperative to ensure that measurements are accurate and reliable. This is achieved by capturing the target motion and utilizing a physical model-based inversion algorithm. However, the SAS optical system's inversion model is a typical ill-posed inverse problem due to its optical parameters, which results in small target sampling errors triggering unacceptable shifts in the solution. To enhance inversion accuracy and make it more robust against observation errors, we suggest dividing the inversion operation into two stages based on the SAS spot motion model. First, the as-rigid-as-possible (ARAP) transformation algorithm calculates the relative rotations and an intermediate variable between the substrates. Second, we solve an inversion linear equation for the relative translation of the substrates, the offset of the optical axes, and the observation orientation. To address the ill-posed challenge, the Tikhonov method grounded on the discrepancy criterion and the maximum a posteriori (MAP) method founded on the Bayesian framework are utilized. The simulation results exhibit that the ARAP method achieves a solution with a rotational error of roughly +/- 3.'' 5 (1/2-quantile); both regularization techniques are successful in enhancing the stability of the solution, the variance of error in the MAP method is even smaller-it achieves a translational error of approximately +/- 18 mu m (1/2-quantile) in comparison to the Tikhonov method's error of around +/- 24 mu m (1/2-quantile). Furthermore, the SAS practical application data indicates the method's usability in this study. Lastly, this paper discusses the intrinsic interconnections between the regularization methods. 35Addresses:[Yu, Ji-Rui; Ruan, Ping; He, Ying-Hong; Tao, Jin-You; Guo, Song; Xue, Bin; Yang, Jian-Feng] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Yu, Ji-Rui; Guo, Song] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Su, Yang; Zhang, Zhe] Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210034, Peoples R China; [Su, Yang] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R ChinaAffiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Nanjing Institute of Astronomical Optics & Technology, NAOC, CAS; Purple Mountain Observatory, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CASPublication Year:2024Volume:24Issue:4Article Number:45003DOI Link:http://dx.doi.org/10.1088/1674-4527/ad283b數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001188032600001