2024
2024
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Record 193 of
Title:Design of electronic readout system for resistive anode based on FPGA
Author Full Names:Song, Yuchao; Zhang, Wenwen; Zheng, Jinkun; Yang, Yang; Bai, Yonglin; La, Anpeng; Duan, JinyaoSource Title:IEICE ELECTRONICS EXPRESSLanguage:EnglishDocument Type:ArticleAbstract:This paper presents an electronic readout system based on the resistance anode, which is capable of processing the output signal from the resistance anode. This design divides the electronic readout circuit into two parts: analog circuit design and digital circuit design. The analog pre-processing circuit the electric charge signal from the resistive anode detector into a voltage signal and amplifies it and the digital part consists of a trapezoidal double -channel shaping algorithm implemented in FPGA. This design overcomes pulse pile-up at high count rates.Addresses:[Song, Yuchao; Zhang, Wenwen; La, Anpeng] Xian Univ Post & Telecommun, Sch Elect Engn, Xian 710121, Peoples R China; [Zheng, Jinkun; Yang, Yang; Bai, Yonglin; Duan, Jinyao] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOPM, Key Lab Ultrafast Photoelect Diagnost Technol, Xian 710119, Peoples R China; [Zheng, Jinkun; Bai, Yonglin] Univ Chinese Acad Sci CAS, Beijing 100049, Peoples R ChinaAffiliations:Xi'an University of Posts & Telecommunications; 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:21Issue:10Article Number:20240117DOI Link:http://dx.doi.org/10.1587/elex.21.20240117數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001237801300005 -
Record 194 of
Title:Fundamental and dipole gap solitons and their dynamics in the cubic-quintic fractional nonlinear Schr?dinger model with a PT-symmetric lattice
Author Full Names:Wang, Li; Zeng, Jianhua; Zhu, YiSource Title:PHYSICA D-NONLINEAR PHENOMENALanguage:EnglishDocument Type:ArticleKeywords Plus:SCHRODINGER-EQUATION; OPTICAL LATTICES; BREAKINGAbstract:The interplay of two linear controlled terms - fractional diffraction and parity-time (PT ) symmetric lattice - gives rise to unique and interesting linear Bloch gap structures within where the nonlinear localized gap modes may exist. In this study, we explore the formation and dynamics of one-dimensional gap solitons in the cubic-quintic physical model combining the fractional diffraction and PT symmetric lattice. Two classes of gap solitons, which we name the fundamental gap solitons and dipole ones, are constructed and their stability regions within the first finite gap of the associated linear Bloch spectrum are identified by means of linear-stability analysis and direct perturbed numerical simulations. We stress that the gap solitons are always unstable under the condition of PT symmetry breaking (the imaginary part of which is above 0.5). The excitations of the stable two classes of gap solitons are also investigated by using the adiabatic variation of the system's parameters. The results predicted here shed some light on soliton physics in physical systems with combined fractional diffraction and PT symmetric lattice and the competing nonlinearities.Addresses:[Wang, Li; Zhu, Yi] Beijing Inst Math Sci & Applicat, Beijing 101408, Peoples R China; [Wang, Li; Zhu, Yi] Tsinghua Univ, Yau Math Sci Ctr, Beijing 100084, Peoples R China; [Wang, Li; Zeng, Jianhua] Tsinghua Univ, Dept Math, Beijing 100084, Peoples R China; [Wang, Li; Zeng, Jianhua] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Ctr Attosecond Sci & Technol, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Zeng, Jianhua] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zeng, Jianhua] Shanxi Univ, Collaborat lnnovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R ChinaAffiliations:Tsinghua University; Tsinghua University; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shanxi UniversityPublication Year:2024Volume:465Article Number:134144DOI Link:http://dx.doi.org/10.1016/j.physd.2024.134144數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001246287800001 -
Record 195 of
Title:Streak tube imaging lidar with kilohertz laser pulses and few-photons detection capability
Author Full Names:Fang, Mengyan; Qiao, Kai; Yin, Fei; Xue, Yanhua; Chang, Yu; Su, Chang; Wang, Zhengzheng; Tian, Jinshou; Wang, XingSource Title:OPTICS EXPRESSLanguage:EnglishDocument Type:ArticleKeywords Plus:NOISE PERFORMANCE ANALYSIS; IMPROVEMENT; ACCURACYAbstract:Lidar using active light illumination is capable of capturing depth and reflectivity information of target scenes. Among various technologies, streak tube imaging lidar (STIL) has garnered significant attention due to its high resolution and excellent precision. The echo signals of a STIL system using single laser pulse are often overwhelmed by noise in complex environments, making it difficult to discern the range of the target. By combining high-frequency laser pulses with the repetitive sweep circuit, the STIL system enables efficient detection of few-photons signal in weak-light environments. Additionally, we have developed a robust algorithm for estimating the depth and reflectivity images of targets. The results demonstrate that this lidar system achieves a depth resolution better than 0.5 mm and a ranging accuracy of 95 um. Furthermore, the imaging of natural scenes also validates the exceptional 3D imaging capability of this system. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing AgreementAddresses:[Fang, Mengyan; Qiao, Kai; Yin, Fei; Xue, Yanhua; Chang, Yu; Su, Chang; Wang, Zhengzheng; Tian, Jinshou; Wang, Xing] Chinese Acad Sci, Key Lab Ultrafast Photoelect Diag Technol, Xian Inst Opt & Precis Mech XIOPM, Xian 710119, Shaanxi, Peoples R China; [Fang, Mengyan; Su, Chang; Tian, Jinshou] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; [Tian, Jinshou] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, 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; Shanxi UniversityPublication Year:2024Volume:32Issue:11Start Page:19042End Page:19056DOI Link:http://dx.doi.org/10.1364/OE.520620數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001238184100002 -
Record 196 of
Title:Single-pixel imaging based on self-supervised conditional mask classifier-free guidance
Author Full Names:Li, Qianxi; Yan, Qiurong; Dong, Jiawei; Feng, Jia; Wu, Jiaxin; Cao, Jianzhong; Liu, Guangsen; Wang, HaoSource Title:OPTICS EXPRESSLanguage:EnglishDocument Type:ArticleAbstract:Reconstructing high -quality images at a low measurement rate is a pivotal objective of Single -Pixel Imaging (SPI). Currently, deep learning methods achieve this by optimizing the loss between the target image and the original image, thereby constraining the potential of low measurement values. We employ conditional probability to ameliorate this, introducing the classifier -free guidance model (CFG) for enhanced reconstruction. We propose a self -supervised conditional masked classifier -free guidance (SCM-CFG) for single -pixel reconstruction. At a 10% measurement rate, SCM-CFG efficiently completed the training task, achieving an average peak signal-to-noise ratio (PSNR) of 26.17 dB on the MNIST dataset. This surpasses other methods of photon imaging and computational ghost imaging. It demonstrates remarkable generalization performance. Moreover, thanks to the outstanding design of the conditional mask in this paper, it can significantly enhance the accuracy of reconstructed images through overlay. SCM-CFG achieved a notable improvement of an average of 7.3 dB in overlay processing, in contrast to only a 1 dB improvement in computational ghost imaging. Subsequent physical experiments validated the effectiveness of SCM-CFG. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing AgreementAddresses:[Li, Qianxi; Dong, Jiawei; Feng, Jia; Wu, Jiaxin; Cao, Jianzhong; Liu, Guangsen; Wang, Hao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Li, Qianxi; Dong, Jiawei; Wu, Jiaxin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yan, Qiurong] Nanchang Univ, Coll Informat Engn, Nanchang 330031, 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; Nanchang UniversityPublication Year:2024Volume:32Issue:11Start Page:18771End Page:18789DOI Link:http://dx.doi.org/10.1364/OE.518455數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001239044000003 -
Record 197 of
Title:Enhancement and suppression of nonsequential double ionization by spatially inhomogeneous fields
Author Full Names:Luo, Xuan; Jiao, Li Guang; Liu, Aihua; Liu, XueshenSource Title:OPTICS EXPRESSLanguage:EnglishDocument Type:ArticleKeywords Plus:ABOVE-THRESHOLD IONIZATION; HARMONIC-GENERATION; DYNAMICS; HELIUMAbstract:Using the three-dimensional classical ensemble approach, we theoretically investigate the nonsequential double ionization of argon atoms in an intense laser field enhanced by bowtienanotip. We observe an anomalous decrease in the double ionization yield as the laser intensity increases, along with a significant gap in the low momentum of photoelectrons. According to our theoretical analysis, the finite range of the induced field by the nanostructure is the fundamental cause of the decline in double ionization yield. Driven by the enhanced inhomogeneous field, energetic electrons can escape from the finite range of nanotips without returning. This reduces the possibility of re-scattering on the nucleus and imprints the finite size effect into the double ionization yield and momentum distribution of photoelectrons in the form of yield decline and a gap in the photoelectron-momentum distribution. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing AgreementAddresses:[Luo, Xuan; Liu, Aihua; Liu, Xueshen] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China; [Jiao, Li Guang] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China; [Liu, Aihua] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R ChinaAffiliations:Jilin University; Jilin University; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of SciencesPublication Year:2024Volume:32Issue:11Start Page:19825End Page:19836DOI Link:http://dx.doi.org/10.1364/OE.523593數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001239697600003 -
Record 198 of
Title:Differentiable design of a double-freeform lens with multi-level radial basis functions for extended source irradiance tailoring
Author Full Names:Tang, Haisong; Li, Haoran; Feng, Zexin; Luo, Yi; Mao, XianglongSource Title:OPTICALanguage:EnglishDocument Type:ArticleKeywords Plus:REFRACTIVE OPTICAL-ELEMENTS; ILLUMINATION OPTICS; SHAPE-DESCRIPTION; SURFACE DESIGN; SYSTEM-DESIGN; WAVE-FRONT; OFF-AXIS; COMPACT; LIGHT; GENERATIONAbstract:Freeform optics are key for generating prescribed illumination patterns from given sources, which are crucial for solidstate lighting and machine vision illumination. There is an increasing demand for compact freeform optics, which presents a substantial challenge for current design methods since the source dimensions must be considered. Most current extended-source design methods, although requiring profound knowledge of optics and mathematics, focus on the modest goal of obtaining uniform irradiance distributions. We address a more challenging design problem of generating an irradiance distribution of arbitrary shape through a double-freeform lens that can fully encompass the extended source. We propose a differentiable design method whose uniqueness lies in the representation of the double-freeform surfaces using multi-level spherical radial basis functions, which has a natural link to a multi-scale optimization technique. In addition, we employ a sequential unconstrained minimization technology complemented with Lagrange multipliers that add key feasibility constraints on lens shape and size. The proposed method is flexible, general, and efficient in designing highly compact freeform lenses for generating both simple and complex irradiance distributions, as demonstrated through the design examples. This could enable a universal solution to the extended-source design problem. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing AgreementAddresses:[Tang, Haisong; Li, Haoran; Feng, Zexin] Beijing Inst Technol, Beijing Engn Res Ctr Mixed Real & Adv Display, Sch Opt & Photon, Beijing 100081, Peoples R China; [Tang, Haisong; Li, Haoran; Feng, Zexin] Beijing Inst Technol, MOE Key Lab Optoelect Imaging Technol & Syst, Beijing 100081, Peoples R China; [Luo, Yi] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China; [Mao, Xianglong] Chinese Acad Sci, Xi An Inst Opt & Precis Mech, New Technol Lab Space Photon Informat, Xian 710119, Shaanxi, Peoples R ChinaAffiliations:Beijing Institute of Technology; Beijing Institute of Technology; Tsinghua University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CASPublication Year:2024Volume:11Issue:5Start Page:653End Page:664DOI Link:http://dx.doi.org/10.1364/OPTICA.520485數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001237035700002 -
Record 199 of
Title:Rapid and non-destructive identification of plastic particles through THz technology and machine learning
Author Full Names:Zhang, Min; Peng, Zhongze; Xu, Xiaoguang; Xie, Xinru; Liu, Yong; Song, QiSource Title:INFRARED PHYSICS & TECHNOLOGYLanguage:EnglishDocument Type:ArticleKeywords Plus:TIME-DOMAIN SPECTROSCOPY; REFRACTIVE-INDEX; TERAHERTZ; COMPOSITESAbstract:For fast and accurate non-destructive differentiation of plastic pellets with similar appearance during import and export inspections, as well as for quality control purposes. Terahertz technology offers a non-destructive analysis approach for samples from diverse fields. By integrating deep learning algorithms with terahertz time-domain spectroscopy (THz-TDS) and linear discriminant analysis (LDA), it is possible to establish a highly accurate terahertz spectroscopy qualitative identification model. Additionally, the incorporation of principal component analysis (PCA) enables the application of this model to higher dimensional data. Notable differences in absorption coefficient, phase difference, and refractive index are observed among different plastic particles. The implementation of this rapid, accurate, and non-destructive detection method can greatly facilitate the testing and identification of plastic particles in customs and quality inspection departments.Addresses:[Zhang, Min; Peng, Zhongze; Xie, Xinru; Liu, Yong] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, State Key Lab Transient Opt & Photon,Minist Educ &, Shenzhen, Peoples R China; [Zhang, Min; Peng, Zhongze; Xie, Xinru; Liu, Yong] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, State Key Lab Transient Opt & Photon,Minist Educ &, Xian, Peoples R China; [Song, Qi] Liaocheng Univ, Sch Phys Sci & Informat Technol, Shandong Key Lab Opt Commun Sci & Technol, Liaocheng, Peoples R China; [Xu, Xiaoguang] Shenzhen Acad Inspection, Quarantine, Shenzhen, Peoples R ChinaAffiliations:Chinese Academy of Sciences; Shenzhen University; Chinese Academy of Sciences; Shenzhen University; State Key Laboratory of Transient Optics & Photonics; Liaocheng UniversityPublication Year:2024Volume:140Article Number:105350DOI Link:http://dx.doi.org/10.1016/j.infrared.2024.105350數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001333912500001 -
Record 200 of
Title:FPM-WSI: Fourier ptychographic whole slide imaging via feature-domain backdiffraction
Author Full Names:Zhang, Shuhe; Wang, Aiye; Xu, Jinghao; Feng, Tianci; Zhou, Jinhua; Pan, AnSource Title:OPTICALanguage:EnglishDocument Type:ArticleKeywords Plus:MISALIGNMENT CORRECTION METHOD; PHASE RETRIEVAL; WIDE-FIELD; MICROSCOPY; ILLUMINATION; ROBUSTNESSAbstract:Fourier ptychographic microscopy (FPM) theoretically provides a solution to the trade-off between spatial resolution and field of view (FOV), and has promising prospects in digital pathology. However, block reconstruction and then stitching has become an unavoidable procedure for reconstruction of large FOV due to vignetting artifacts. This introduces digital stitching artifacts, as the existing image-domain optimization algorithms are highly sensitive to systematic errors. Such obstacles significantly impede the advancement and practical implementation of FPM, explaining why, despite a decade of development, FPM has not gained widespread recognition in the field of biomedicine. We report a feature-domain FPM (FD-FPM) based on the structure-aware forward model to realize stitching-free, full-FOV reconstruction. The loss function is uniquely formulated in the feature domain of images, which bypasses the troublesome vignetting effect and algorithmic vulnerability via feature-domain backdiffraction. Through massive simulations and experiments, we show that FD-FPM effectively eliminates vignetting artifacts for full-FOV reconstruction, and still achieves impressive reconstructions despite the presence of various systematic errors. We also found it has great potential in recovering the data with a lower spectrum overlapping rate, and in realizing digital refocusing without a prior defocus distance. With FD-FPM, we achieved full-color and high-throughput imaging (4.7 mm diameter FOV, 336 nm resolution in the blue channel) free of blocking-and-stitching procedures on a self-developed Fourier ptychographic microscopy whole slide imaging platform. The reported FD-FPM shows the value of FPM for various experimental circumstances, and offers physical insights useful for the developments of models for other computational imaging techniques. The reported platform demonstrates high-quality, high -speed imaging and low cost, and could find applications in many fields of biomedical research, as well as in clinical applications. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing AgreementAddresses:[Zhang, Shuhe; Wang, Aiye; Xu, Jinghao; Feng, Tianci; Pan, An] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Zhang, Shuhe] Maastricht Univ, Med Ctr, NL-6202 AZ Maastricht, Netherlands; [Zhang, Shuhe; Zhou, Jinhua] Anhui Med Univ, Sch Biomed Engn, Hefei 230032, Peoples R China; [Wang, Aiye; Xu, Jinghao; Feng, Tianci; Pan, An] 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; Maastricht University; Anhui Medical University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CASPublication Year:2024Volume:11Issue:5Start Page:634End Page:646DOI Link:http://dx.doi.org/10.1364/OPTICA.517277數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001238513700001 -
Record 201 of
Title:High-efficiency longwave 2085 nm laser output in low-loss Ho3+-doped fluorotellurite glass fiber by 1976 nm in-band pumping
Author Full Names:Feng, Shaohua; Shen, Yewei; Zhu, Jun; Liu, Chengzhen; Xu, Yantao; Xiao, Xusheng; Guo, HaitaoSource Title:OPTICS AND LASER TECHNOLOGYLanguage:EnglishDocument Type:ArticleKeywords Plus:MU-M EMISSIONAbstract:High-gain Ho3+-doped optical fibers are imperative exigency for > 2 mu m single-mode fiber lasers. Here, we have successfully developed and fabricated a low-loss Ho3+-doped fluorotellurite glass fiber. The high-power laser irradiation tolerance of the fiber was verified, and the end face of Ho3+-doped fluorotellurite glass fiber remained undamaged under a similar to 70 W of 981 nm CW laser irradiation. An unsaturated maximum 6.35 W@2085 nm single-mode laser output with a slope efficiency of 90.4 % was achieved in a 25 cm short fiber by homemade 1976 nm laser in-band pumping. To the best of our knowledge, this is currently the highest slope efficiency reported for Ho3+ doped fluorotellurite fiber lasers to date in a space laser cavity. The effects of the fiber length on the laser threshold, slope efficiency, and output wavelength are further discussed. This work offers valuable insights into prospective candidate materials and scheme designs for the future development of high-efficiency, long-wavelength mid-infrared similar to 2.1 mu m fiber lasers.Addresses:[Feng, Shaohua; Zhu, Jun; Liu, Chengzhen; Xu, Yantao; Xiao, Xusheng; Guo, Haitao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China; [Feng, Shaohua; Zhu, Jun; Liu, Chengzhen; Xu, Yantao; Xiao, Xusheng; Guo, Haitao] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; [Shen, Yewei] Harbin Engn Univ, Key Lab Infiber Integrated Opt, Minist Educ China, Harbin 150001, Peoples R China; [Guo, Haitao] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R ChinaAffiliations:State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Harbin Engineering University; Shanxi UniversityPublication Year:2024Volume:177Article Number:111179DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111179數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001244518000001 -
Record 202 of
Title:Advanced lead-free double perovskites/silica hybrid nanocrystals for highly stable light-emitting diodes
Author Full Names:Shi, Jindou; Wang, Zeyu; Xu, Luxia; Wang, Junnan; Da, Zheyuan; Zhang, Chen; Ji, Yongqiang; Yao, Qing; Xu, Youlong; Gaponenko, Nikolai V.; Tian, Jinshou; Wang, MinqiangSource Title:JOURNAL OF MATERIALS CHEMISTRY CLanguage:EnglishDocument Type:ArticleKeywords Plus:STABILITYAbstract:The commercial viability of fluorescent materials is critically contingent on their thermal stability. Recent interest has converged on lead-free double perovskites (DPs), renowned for their optical properties mirroring those of traditional lead-based counterparts and superior atmospheric stability. However, these materials encounter significant fluorescence degradation in thermal environments, a challenging scenario given the high temperatures endemic to the surfaces of optoelectronic devices during prolonged operation, detrimentally impacting the fluorescent attributes of lead-free DPs. To address this challenge, in situ synthesis of lead-free DP nanocrystals (NCs) within KIT-6 mesoporous molecular sieves is proposed, yielding Cs2AgIn0.98Bi0.02Cl6@KIT-6 NCs with enhanced optical qualities. Experimental results demonstrate a marked enhancement in the fluorescence thermal stability of these NCs, attributed to the protective KIT-6 shell layer. Subjected to high power operation (100 mA) for 270 minutes, the fabricated orange light-emitting diode (LED) device maintained 80% of initial luminous efficiency, despite the resultant elevated surface temperature of 326.8 K. Therefore, this novel in situ assembly approach significantly bolsters the operational stability of lead-free DPs, paving the way for their potential commercial applications. Cs2AgIn0.98Bi0.02Cl6@KIT-6 NCs were obtained by in situ assembly within KIT-6 mesoporous molecular sieves, and their fluorescence thermal stability was significantly improved benefiting from the protection of the KIT-6 shell layer.Addresses:[Shi, Jindou; Wang, Junnan; Da, Zheyuan; Zhang, Chen; Ji, Yongqiang; Yao, Qing; Xu, Youlong; Wang, Minqiang] Xi An Jiao Tong Univ, Key Lab Minist Educ, Elect Mat Res Lab, Int Ctr Dielect Res, Xian 710049, Peoples R China; [Shi, Jindou; Wang, Junnan; Da, Zheyuan; Zhang, Chen; Ji, Yongqiang; Yao, Qing; Xu, Youlong; Wang, Minqiang] Xi An Jiao Tong Univ, Shannxi Engn Res Ctr Adv Energy Mat & Devices, Xian 710049, Peoples R China; [Wang, Zeyu] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol FIST, Xian 710049, Peoples R China; [Wang, Zeyu] Xi An Jiao Tong Univ, Micro & Nanotechnol Res Ctr, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China; [Xu, Luxia; Tian, Jinshou] Xi An Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China; [Gaponenko, Nikolai V.] Belarusian State Univ Informat & Radioelect, P Browki 6, Minsk 220013, BELARUSAffiliations:Xi'an Jiaotong University; Xi'an Jiaotong University; Xi'an Jiaotong University; Xi'an Jiaotong University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Belarusian State University of Informatics & RadioelectronicsPublication Year:2024Volume:12Issue:29Start Page:11051End Page:11059DOI Link:http://dx.doi.org/10.1039/d4tc00585f數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001232950100001 -
Record 203 of
Title:Linear-space-variant model for Fourier ptychographic microscopy
Author Full Names:Feng, Tianci; Wang, Aiye; Wang, Zhiping; Liao, Yizheng; Pan, AnSource Title:OPTICS LETTERSLanguage:EnglishDocument Type:ArticleAbstract:Fourier ptychographic microscopy (FPM) needs to realize well-accepted reconstruction by image segmentation and discarding problematic data due to artifacts caused by vignetting. However, the imaging results have long suffered from uneven color blocks and the consequent digital stitching artifacts, failing to bring satisfying experiences to researchers and users over the past decade since the invention of FPM. In fact, the fundamental reason for vignetting artifacts lies in that the acquired data does not match the adopted linear-space-invariant (LSI) forward model, i.e., the actual object function is modulated by a quadratic phase factor during data acquisition, which has been neglected in the advancement of FPM. In this Letter, we rederive a linear-space-variant (LSV) model for FPM and design the corresponding loss function for FPM, termed LSV-FPM. Utilizing LSV-FPM for optimization enables the efficient removal of wrinkle artifacts caused by vignetting in the reconstruction results, without the need of segmenting or discarding images. The effectiveness of LSV-FPM is validated through data acquired in both 4f and finite conjugateAddresses:[Feng, Tianci; Wang, Aiye; Wang, Zhiping; Liao, Yizheng; Pan, An] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Feng, Tianci; Wang, Aiye; Liao, Yizheng; Pan, An] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Zhiping] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R ChinaAffiliations:State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Lanzhou UniversityPublication Year:2024Volume:49Issue:10Start Page:2617End Page:2620DOI Link:http://dx.doi.org/10.1364/OL.522745數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001239271900004 -
Record 204 of
Title:Forming quality optimization of 2219 aluminum alloy thin-walled complex components based on fracture constraint in spin forming
Author Full Names:Li, Rui; Zheng, Zebang; Zhao, Tao; Liu, Qi; Yu, Zhenyang; Zhang, HongruiSource Title:INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGYLanguage:EnglishDocument Type:ArticleKeywords Plus:STRESS; DAMAGE; EVOLUTION; MODELAbstract:The 2219 aluminum alloy thin-walled complex components manufactured by spin forming are frequently applied to the bottom end of rocket fuel tanks. However, fracture and quality problems (large part-mold contact gap, low roundness, thickness accuracy) are prone to occur during their multi-pass spin forming. While the material anisotropy, complicated components geometry and the complex stress state evolution make it difficult to obtain the appropriate forming process parameters in spin forming. With the help of finite element methods, it is possible to solve this difficulty. Thus, based on the anisotropic Barlat89 yield function and the DF2016 fracture criterion, a spin forming finite element model considering material anisotropy and damage evolution is established first for the components. Then, a method by using multi-pass involute spinning track with variable diameter base circle to form the components is proposed, and also the spinning passes are determined. Finally, taking the non-fracture as the constraint condition and the forming quality indexes (part-mold contact gap, roundness, and thickness accuracy) as the optimization objectives, a multi-objective optimization model based on orthogonal experimental design and response surface model is established. The optimized process parameters are solved and determined by a combination of the Archive-Based Micro Genetic Algorithm, and the optimized results are verified by the experiments.Addresses:[Li, Rui; Yu, Zhenyang] Tiangong Univ, Sch Mech Engn, Tianjin 300387, Peoples R China; [Zheng, Zebang] Northwestern Polytech Univ, Sch Mat Sci & Engn, Shaanxi Key Lab High Performance Precis Forming T, Xian 710072, Peoples R China; [Zhao, Tao] Shanghai Spaceflight Precis Machinery Inst, Shanghai 201600, Peoples R China; [Liu, Qi] Beijing Hangxing Machinery Manufacture Ltd Corp, Beijing 100013, Peoples R China; [Zhang, Hongrui] Chinese Acad Sci, Inst Opt & Precis Mech, Xian 710119, Peoples R ChinaAffiliations:Tiangong University; Northwestern Polytechnical University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CASPublication Year:2024Volume:133Issue:1-2Start Page:433End Page:450DOI Link:http://dx.doi.org/10.1007/s00170-024-13759-6數(shù)據(jù)庫(kù)ID（收錄號(hào)）:WOS:001223487300004