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Robust wireless communication using self-healing non-diffracting beams 认领 引用
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作者 JUN XIA YUJIE LIU +5 位作者 JIAWEI WANG XIAOJIAN FU QIANRU YANG YU LUO TIE JUN CUI JINGJING ZHANG 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2028-2037,共10页
The surge in wireless data traffic propelled by the Internet of Things,autonomous systems,and augmented reality calls for new microwave communication systems that can overcome the fundamental limitations of line-of-si... The surge in wireless data traffic propelled by the Internet of Things,autonomous systems,and augmented reality calls for new microwave communication systems that can overcome the fundamental limitations of line-of-sight(LOS)propagation.To address this need,we propose a metamaterial-based platform that integrates non-diffracting beam dynamics with microwave communications to achieve robust obstacle-immune transmissions.We design and fabricate a multilayer dielectric metasurface operating across 15-25 GHz,which can modulate the phase and amplitude simultaneously and independently to generate non-diffracting beams. 展开更多
关键词 multilayer dielectric metasurface microwave communications self healing non diffracting beams internet things augmented reality microwave communication systems wireless communication
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UNSTEADY INTERACTION OF SHOCK WAVE DIFFRACTING AROUND A CIRCULAR CYLINDER IN AIR 认领 引用 被引量：2
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作者 黄文生 O.Onodera K.Takayama 《Acta Mechanica Sinica》 SCIE CAS 1991年第4期295-299,共5页
The reflection and diffraction of a planar shock wave around a circular cylinder are a typical problem of the complex nonlinear shock wave phenomena in literature.It has long been studied experimentally,analytically a... The reflection and diffraction of a planar shock wave around a circular cylinder are a typical problem of the complex nonlinear shock wave phenomena in literature.It has long been studied experimentally,analytically as well as numerically.Takayama in 1987 obtained clear experimental pictures ofisopycnics in shock tube under the condi- tion that the impinging shock wave propagates as far as 3 diameters away from the cylinder.To know more complete- ly the whole unsteady process,it is desirable to get experimental results in a region which is more than 10 diameters away from the cylinder.This is what has been done in this paper by using the pulsed laser holographic interferometry for several shock Mach numbers of the impinging shock. Results for several moments are shown,giving more know- ledge about the whole unsteady flow field.This is useful for a reliable and complete understanding of the changing force acting on the cylinder,and provides interesting data to check the performance of many recently developed high resolution numerical methods for unsteady shock wave calculation. 展开更多
关键词 shock wave diffraction large flow field around a cylinder pulsed laser holographic interferometry isopycnics complex interaction of curved shocks
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Customizable edge contour glass cutting enabled by improved volumetric holographic algorithm 认领 引用
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作者 Yanlei Hu Xinyu Gui +7 位作者 Chaowei Wang Yuhang Xue Liqun Xu Jiabin Bi Wanqun Chen Fangwen Sun Jiaru Chu Dong Wu 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第1期617-626,共10页
Ultra-thin glass(UTG)possesses a broad spectrum of applications in high-end electronic devices,such as foldable smartphones and flexible displays.Laser beam shaping for arc cutting UTG screens helps reduce stress conc... Ultra-thin glass(UTG)possesses a broad spectrum of applications in high-end electronic devices,such as foldable smartphones and flexible displays.Laser beam shaping for arc cutting UTG screens helps reduce stress concentration,thereby effectively enhancing their safety and longevity.However,the existing three-dimensional(3D)holography algorithms in beam shaping often suffer from high computational complexity and limited flexibility.To address these issues,we propose an iterative holographic algorithm combined with 3D chirp-z transform(3D-CZT)that generates 3D designable multi-foci with 90%light field uniformity.It also effectively corrects spherical aberration caused by refractive index mismatches,while maintaining precise beam shaping throughout the material.Moreover,by focusing on a specific region,the 3D-CZT method reduces the single iteration time to 0.5 seconds,achieving a speed one order of magnitude faster than conventional algorithms.On this basis,customizable glass-edge cutting by shaping the 3D-focused beam within the material is achieved.The glass edge demonstrates high geometric fidelity and remains smooth,mitigating the risk of micro-cracks.This work proposes a sophisticated and efficient methodology for the laser cutting of transparent materials. 展开更多
关键词 holographic processing beam reshaping transparent materials diffractive optics laser processing
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Deformation Behavior and Mechanisms of fcc High-Entropy Alloys:Insights from Neutron Diffraction 认领 引用
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作者 Zhao Yanchun Yao Yatao +9 位作者 Zhang Fan Huang Yan Zhang Yibo Lu Zhichao Zhang Qi Fu Xiaoling Wang Anding Zhang Fei Song Wenli Ma Dong 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第3期655-664,共10页
The multi-principal element characteristic of high-entropy alloys has revolutionized the conventional alloy design concept of single-principal element,endowing them with excellent mechanical properties.However,owing t... The multi-principal element characteristic of high-entropy alloys has revolutionized the conventional alloy design concept of single-principal element,endowing them with excellent mechanical properties.However,owing to this multi-principal element nature,high-entropy alloys exhibit complex deformation behavior dominated by alternating and coupled deformation mechanisms.Therefore,elucidating these intricate deformation mechanisms remains a key challenge in current research.Neutron diffraction(ND)techniques offer distinct advantages over traditional microscopic methods for characterizing such complex deformation behavior.The strong penetration capability of neutrons enables in-situ,real-time,and non-destructive detection of structural evolution in most centimeter-level bulk samples under complex environments,and ND allows precise characterization of lattice site occupations for light elements,such as C and O,and neighboring elements.This review discussed the principles of ND,experiment procedures,and data analysis.Combining with recent advances in the research about face-centered cubic high-entropy alloy,typical examples of using ND to investigate the deformation behavior were summarized,ultimately revealing deformation mechanisms dominated by dislocations,stacking faults,twinning,and phase transformations. 展开更多
关键词 high-entropy alloys neutron diffraction face centered-cubic structure deformation mechanism
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Revision of the absolute configurations of Pallavicinia diterpenoids and further discovery of their Diels-Alder cycloadducts 认领 引用
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作者 Jiao-Zhen Zhang Cheng-Min Zhang +7 位作者 Yong-Jie Wang Pei-Lin Wu Rui-Feng Liu Ye Li Ming-Zhu Zhu Shuang-Zhi Yuan Ze-Jun Xu Hong-Xiang Lou 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期394-398,共5页
Owing to their intricate molecular frameworks and copious chiral centers,the structural identification and configurational assignment of natural products are challenging tasks.Comprehensive spectral data analysis is c... Owing to their intricate molecular frameworks and copious chiral centers,the structural identification and configurational assignment of natural products are challenging tasks.Comprehensive spectral data analysis is crucial for the confirmation of absolute configurations.Ignoring critical parameters will lead to false structure,which may confuse the total synthesis and drug development.Herein,the configurations of seven heterogeneous Pallavicinia diterpenoids(PDs) isolated from Pallavicinia liverworts are revised using a combination of single-crystal X-ray diffraction and electronic circular dichroism(ECD) calculations.Meanwhile,identification of five unprecedented PD heterodimers PD-dimers A-E(18-22) along with eleven previously undescribed PDs(5-9,13-17,23) obtained by the reinvestigation of the Chinese liverwort Pallavicinia subciliata have resulted in corrections and support the revised conclusions. 展开更多
关键词 Revision Absolute configurations Pallavicinia diterpenoids Liverwort Single-crystal X-ray diffraction Electronic circular dichroism calculations
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Precipitation-strengthened micromechanical behaviors of magnesium alloy under cyclic loading 认领 引用
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作者 Chuhao Liu Di Xie +6 位作者 Yanfei Gao Xiaodan Zhang Shengyi Zhong Huamiao Wang Ke An Peter K.Liaw Yinghong Peng 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第5期205-224,共20页
The microscopic-deformation mechanisms of an extruded magnesium alloy with and without precipitates[Guinier-Preston(GP)zones]subjected to cyclic deformation were investigated by in-situ neutron-diffraction(ND)measurem... The microscopic-deformation mechanisms of an extruded magnesium alloy with and without precipitates[Guinier-Preston(GP)zones]subjected to cyclic deformation were investigated by in-situ neutron-diffraction(ND)measurements and crystal-plasticity modeling.The relationship between the macroscopic-cyclic-deformation behavior and the microscopic responses(particularly twinning and detwinning)at the grain level was established.The general deformation-mechanism evolution in the solution-state(ST)sample was similar to that in the peak-aged-state(PA)sample over fatigue cycles.Both samples plastically deformed by extension twinning during compression,and by a sequential process of detwinning and dislocation motion under reverse tension.The main difference is that in the PA sample,the presence of precipitating particles constrains the twinning/detwinning behaviors,which leads to an increase in the participation of dislocation slip in the plastic deformation and then induces a strengthening effect during cyclic loading.Based on the combination of the previous in-situ ND results and crystal-plasticity model,our work provides a comprehensive analysis of the interaction between the precipitation strengthening and twinning/detwinning mechanism under the whole multi-cycle cyclic loading and their effect on the macro-and micro-mechanical behavior of the precipitate-strengthened magnesium alloys. 展开更多
关键词 Cyclic deformation Magnesium alloy In-situ neutron diffraction Precipitation strengthening Crystal plasticity Lattice strain Mechanism evolution
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Mechanical and in situ thermal-related behavior during directed energy deposition additive manufacturing of a high-performance Al alloy 认领 引用
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作者 Da Guo Chengbo Zhu +9 位作者 Harry E.Chapman Kai Zhang Wei Li Shishira Bhagavath Robert Atwood Stefan Michalik Dmitry G.Eskin Iakovos Tzanakis Chu Lun Alex Leung Peter.D.Lee 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期616-631,共16页
Directed energy deposition(DED)additive manufacturing(AM)can fabricate,repair,and join near-net-shaped components for high-performance engineering applications,including biomedical,energy,and transport sectors.The bro... Directed energy deposition(DED)additive manufacturing(AM)can fabricate,repair,and join near-net-shaped components for high-performance engineering applications,including biomedical,energy,and transport sectors.The broader adoption of DED remains constrained by the limited number of alloys available that can be reliably manufactured without imperfections,hence limiting mechanical properties.Here,we designed an Al-Ni-Ce-Mn-Fe AM alloy that can achieve an ultra-fine microstructure(<5μm),uniform distribution of intermetallics,low residual stress(<32 MPa),and superior mechanical properties in as-built DED components.Compared to DED AlSi10Mg in the as-built state using the same conditions,the yield increased by 70%,and the ultimate tensile strength by 50%.DED-AM involves rapid cooling and complex thermal conditions,which largely influence the property of the final components.Post-characterization cannot capture the time resolved thermal behavior,hence offer limited mechanism-based guide for alloy design.In this study,we develop a novel multimodal characterization methodology for correlative in situ X-ray imaging,X-ray diffraction,and infrared imaging,enabling quantification of the in situ thermal-related behavior,including phase evolution,temperature distribution,and stress accumulation during DED.We elucidated key mechanisms driving the structure refinement and stress development in this alloy.The insights gained into the interplay between alloy composition,thermal-related behavior,and performance under specific AM conditions inform next-generation material design tailored for AM technologies. 展开更多
关键词 directed energy deposition synchrotron X-ray diffraction synchrotron X-ray imaging microstructure properties additive manufacturing
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Structural evolution in Fe-15Mn steel under thermal cycling 认领 引用
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作者 Li-Ying Sun Hui-Lan Huang +10 位作者 Sergey Viktorovich Sumnikov Roman Nikolaevich Vasin Ivan Anatolyevich Bobrikov Gizo Dasmirovich Bokuchava Anatoly Mikhailovich Balagurov Natalia Yurievna Tabachkova Bo-Lin Qu Rustam Mannapovich Saidov Bei-Yue Ma Fu-Xing Yin Igor Stanislavovich Golovin 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第5期226-232,共7页
The martensitic transition sequence and microstructure evolution in a homogenized Fe-15Mn alloy under thermal cycling,involving a thermal body-centered cubicα′-martensite,hexagonal close-packed-martensite,and face-c... The martensitic transition sequence and microstructure evolution in a homogenized Fe-15Mn alloy under thermal cycling,involving a thermal body-centered cubicα′-martensite,hexagonal close-packed-martensite,and face-centered cubicγ-austenite,were characterized by neutron diffraction and transmission electron microscope.Theα′transition is observed for the first time during heating.Upon cooling,γ→andγα′transitions occur concomitantly.The transition rate of theγis higher than that of theγα′in the early stage of the phase transition.The Fe-15Mn alloy exhibits a pronounced volume effect of phase transition(1.6%for→γ,1.8%forα′→γ,and 4.2%for→α′),which induces an obvious lattice mismatch.The sharp increase in the volume fraction of-martensite after thermal cycling is attributed to the formation of abundant stacking faults and the pre-existingα′-martensite within the alloy. 展开更多
关键词 Fe-Mn alloy Martensitic transition Volume effect Lattice mismatch In situ neutron diffraction
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Slip transfer,slip blocking and slip-to-twin transfer at grain boundaries in a WE43 Mg alloy 认领 引用
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作者 Yidi Li Biaobiao Yang +1 位作者 Yunping Li Javier LLorca 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第6期368-379,共12页
Slip transfer/blocking at grain boundaries was studied in a WE43 Mg alloy through a combined experimental approach involving electron backscatter diffraction(EBSD),slip trace modified lattice rotation analysis(ST-MLRA... Slip transfer/blocking at grain boundaries was studied in a WE43 Mg alloy through a combined experimental approach involving electron backscatter diffraction(EBSD),slip trace modified lattice rotation analysis(ST-MLRA),and diffraction contrast tomography(DCT).Slip(basal slip)transfer occurred exclusively across low-angle grain boundaries(<20°),while slip blocking was dominant(80.4%),and slip to twin transfer typically occurred at higher misorientation angles.Among the geometric descriptors analyzed,low values ofκ(angle between slip directions),ψ(angle between slip plane normals),andθ(angle between the traces of the incoming and outgoing slip planes with the GB plane)were consistently associated with the slip transfer cases.Notably,slip transfer events were tightly gathered in the high-compatibility region where both the Luster-Morris parameter(m)and the LRB factor exceeded 0.9,suggesting that both serve as robust criteria for basal slip transmission across grain boundaries.The integration of 3D grain morphology with actual slip system identification provides a comprehensive framework for evaluating intergranular deformation in Mg alloys. 展开更多
关键词 Slip transfer Magnesium Grain boundary Diffraction contrast tomography Geometric descriptor
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A comprehensive understanding of the structural evolution and capacity contribution of fast-charging NCM cathodes 认领 引用
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作者 Chao Wang Yuying Zhang +7 位作者 Zhenzhong Li Jianwen Wang Huiyan Zeng Jiajun Chen Yitao Liu Mengxian Li Shaofei Wang Chunzhen Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期183-193,共11页
Achieving extreme fast charging(XFC,-6 C)capability remains a challenge for Li ion batteries in electric vehicle applications.This work employs time-resolved X-ray diffraction(XRD)to investigate the structural evoluti... Achieving extreme fast charging(XFC,-6 C)capability remains a challenge for Li ion batteries in electric vehicle applications.This work employs time-resolved X-ray diffraction(XRD)to investigate the structural evolution and capacity contributions of a series of LiNixCoyMnzO2(x+y+z=1,NCM)cathodes under XFC conditions.All NCM cathodes(NCM-92,NCM-83,and NCM-622)deliver -60%of their capacities with less than 2%unit cell volume expansion during the H1-H2 phase transition,but the subsequent H2-H3 phase transition exhibits significant compositional and rate dependence.The NCM-92 cathode shows a maximum d-spacing shrinkage of-5.3%at 6 C,which is larger than that of NCM-83(-4.1%)and NCM-622(-0.05%).Furthermore,NCM-92 follows a“phase heterogeneity”pathway for its structural evolution above 4.2 V,distinct from the“solid-solution”pathway observed in NCM-83 and NCM-622.This phase heterogeneity is evidenced by the splitting of the(003)diffraction peak and a decrease in intensity during the H2-H3 phase transition,indicating the formation of lithium-rich/depleted domains.These findings establish a direct correlation between cathode composition,structural dynamics,and XFC performance,highlighting a critical trade-off between structural stability and fast-charging capability in nickel-rich layered oxides. 展开更多
关键词 Extreme fast charge(XFC)batteries Time-resolved X-ray diffraction(XRD) Structural evolutions Rate performance
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Analytical Modeling of Wave Diffraction by Eccentric Multi-Cylinders Within a Porous Circular Cylinder 认领 引用
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作者 ZHAI Zhen-feng ZHENG Si-ming +1 位作者 ZHAO Tian-cong Gregorio IGLESIAS 《China Ocean Engineering》 SCIE EI CSCD 2026年第3期547-562,共16页
This study investigates the hydrodynamic characteristics of an eccentric multi-cylinder system composed of a porous outer cylinder and multiple inner cylinders,based on linear potential flow theory.A semi-analytical m... This study investigates the hydrodynamic characteristics of an eccentric multi-cylinder system composed of a porous outer cylinder and multiple inner cylinders,based on linear potential flow theory.A semi-analytical model is developed using the eigenfunction expansion method,and its accuracy is validated against existing theoretical and numerical results.The findings reveal that the wave loads on the inner cylinders are highly sensitive to the porosity,spacing,and radius ratio.The underlying mechanisms involve energy dissipation,interference modulation,and geometric shielding,which collectively govern wave focusing,load variation,and energy attenuation within the system.Moreover,the arrangement and permeability of the inner cylinders play a crucial role in mitigating wave concentration and suppressing water accumulation in the gaps,thereby offering valuable implications for structural optimization.This work provides new insights into the hydrodynamic mechanisms of eccentric multi-cylinder systems and offers theoretical guidance for coastal protection,wave energy utilization,and offshore foundation design. 展开更多
关键词 wave-structure interaction wave diffraction eccentric multi-cylinder system wave loads
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Contrastive learning for data-efficient substrate deoxidation monitoring in edge-side adaptive molecular beam epitaxy systems 认领 引用
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作者 Yuehao Li Chao Shen +6 位作者 Wenkang Zhan Bo Xu Yazhou Yang Xu Zhang Hongchang Wang Chao Zhao Haifang Jian 《Journal of Semiconductors》 EI CAS CSCD 2026年第3期28-37,共10页
Accurate temperature control and effective oxide removal are essential for achieving high-quality epitaxial growth in molecular beam epitaxy(MBE).However,traditional methods often rely on manual identification of refl... Accurate temperature control and effective oxide removal are essential for achieving high-quality epitaxial growth in molecular beam epitaxy(MBE).However,traditional methods often rely on manual identification of reflection high-energy electron diffraction(RHEED)patterns.This process is heavily influenced by the grower’s experience,leading to issues with reproducibility and limiting the potential for automation.In this report,we propose an unsupervised learning framework for realtime RHEED analysis during the deoxidation process.By incorporating temporal similarity constraints into contrastive learning,our model generates smooth and interpretable feature trajectories that illustrate transitions in the deoxidation state,thus eliminating the need for manual labeling.The model,pre-trained using grouped contrastive loss,shows significant improvement in RHEED feature boundary discrimination and localization of critical regions.We evaluated its generalizability through two transfer learning strategies:calibration-free clustering and few-shot fine-tuning.The pre-trained model achieved a clustering accuracy of 88.1%for GaAs deoxidation samples without additional labels and reached an accuracy of 94.3%to 95.5%after fine-tuning with just five sample pairs across GaAs,Ge,and InAs substrates.This framework is optimized for resource-constrained edge devices,allowing for real-time,plug-and-play integration with existing MBE systems and swift adaptation across various materials and equipment.This work paves the way for greater automation and improved reproducibility in semiconductor manufacturing. 展开更多
关键词 contrastive learning molecular beam epitaxy real-time control reflection high-energy electron diffraction
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High-speed all-optical speckle decryption empowered by a physics-informed diffractive neural network 认领 引用
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作者 Jiaan Gan Yong Yang +2 位作者 Siwei Zhu Shengjiang Chang Xiaocong Yuan 《Advanced Photonics Nexus》 CSCD 2026年第1期150-157,共8页
Speckle-based optical cryptosystems are promising technologies for information security.However,existing techniques mostly rely on digital decryption,resulting in computational delay and undermining the high-speed adv... Speckle-based optical cryptosystems are promising technologies for information security.However,existing techniques mostly rely on digital decryption,resulting in computational delay and undermining the high-speed advantage of optical encryption.Moreover,conventional neural networks are typically effective only on images from the same distribution as the training datasets,limiting their general applicability.In this paper,we propose an all-optical high-speed decryption scheme for real-time recovery of speckle-encoded ciphertexts.By constructing a physics-informed diffractive neural network that approximates the inverse transmission matrix of the scattering medium,secret images can be directly reconstructed from speckle fields without optoelectronic conversion or post-processing.The network is trained with only 2048 samples from the MNIST dataset.Its transfer learning capability is validated across three out-of-distribution datasets,with decrypted images achieving a Pearson correlation coefficient of 0.82 and a structural similarity index measure of 0.75,demonstrating excellent transfer learning capability.For the first time,to our knowledge,this scheme simultaneously overcomes the bottlenecks of decryption delay and limited network generalizability in conventional speckle-based cryptosystems,achieving real-time image decryption with strong transferability.It provides a new pathway for developing low-power,real-time,and broadly applicable optical encryption systems,demonstrating significant potential for applications in high-speed security optical communications. 展开更多
关键词 speckle all-optical decryption diffractive neural network transmission matrix transfer learning real time
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Phase equilibria and crystal structures of ternary compounds in the Mg-Gd-Ag system over a composition range of 0-50 at.%Gd at 450 and 500℃ 认领 引用
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作者 Qin Li Honghui Xu Lijun Zhang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第1期292-305,共14页
Alloying with Gd and Ag can significantly enhance the comprehensive properties of magnesium alloys,and accurate phase equilibria are a necessity for advanced alloy design.However,literature review reveals limited info... Alloying with Gd and Ag can significantly enhance the comprehensive properties of magnesium alloys,and accurate phase equilibria are a necessity for advanced alloy design.However,literature review reveals limited information on the phase equilibria in the ternary Mg-Gd-Ag system.Thus,in this paper,the phase equilibria of the ternary Mg-Gd-Ag system in the region of 0-50 at.%Gd at 450℃and 500℃were investigated by combining the electron probe microanalysis and X-ray diffraction of totally 66 equilibrated alloys,with two isothermal sections at 450℃and 500℃established accordingly;and relatively high solid solubility of Ag in GdMg3was characterized.Moreover,seven ternary compounds(denoted asτ1toτ7)were found,and their crystal structures were refined by using Rietveld method.Theτ1was identical to the previously reported X phase with a diamond-cubic structure,while the remaining six ternary compounds(τ2toτ7)were newly found.The seven ternary compounds(τ1toτ7)are among the space groups of Fd3m(τ1),P4mm(τ2),P63mc(τ3),P63mc(τ4),Pmn21(τ5),P62m(τ6)and Pc(τ7).Their homogeneity ranges and lattice parameters were carefully determined.The solubilities of the third elements in the binary compounds of the three subsystems were also well measured.It is anticipated that the presently obtained phase equilibria as well as the crystal structures of ternary compounds in the Mg-Gd-Ag system would serve as a foundation for developing thermodynamic database and alloy design in the near future. 展开更多
关键词 Mg-Gd-Ag system Phase equilibria Crystal structure Electron probe microanalysis X-ray diffraction
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A comparative study of extended depth of focus,bifocal intraocular lenses and their mix-and-match 认领 引用
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作者 Fan Fan Xi-Yue Zhou +2 位作者 Jia-Ning Yang Xin Liu Yi Luo 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2026年第6期1072-1078,共7页
AIM:To compare the visual performances of extended depth of focus(EDOF)lenses,diffractive bifocal intraocular lenses(IOLs)and their combination.METHODS:This was a prospective,consecutive observational comparative stud... AIM:To compare the visual performances of extended depth of focus(EDOF)lenses,diffractive bifocal intraocular lenses(IOLs)and their combination.METHODS:This was a prospective,consecutive observational comparative study performed from Dec 2020 to Dec 2021.Cataract patients who meet the indications for multifocal IOLs implantation were divided into three groups,including binocular diffractive bifocal IOL(Human Optics Diff-aAY)implantation group,binocular EDOF IOL(Tecnis Symfony ZXR00)group and mix-and-match group(Symfony in one eye and Diff-aAY in the other).Follow-ups were scheduled at 1d,3d,2wk,and 6mo.Visual acuities(VA)at different distances were examined at every follow-up.At 6mo,optic path difference(OPD)scans,and questionnaire answers were evaluated.RESULTS:Thirty patients(60 eyes)were included in the binocular Diff-aAY group[age 63(59-68),11 males],29 patients(58 eyes)in the binocular Symfony group[age 62(56.75-68),15 males]and 27 patients in mix-and-match group[age 65(51-71),11 males].There was no significant difference in binocular uncorrected distance VA,uncorrected intermediate VA,or uncorrected near VA among the three groups(P=0.082,0.151,and 0.703,respectively)at the last follow-up.The mix-and-match group had a superior Strehl ratio(SR;P=0.025)and modulation transfer function(MTF;P<0.05)and an inferior root mean square(RMS;P<0.05)in OPD scan.The three groups reported comparable level of postoperative satisfaction(P=0.141)and spectacle independence(P=0.278).Mild subjective dysphotopsia was more common(22.22%)in mix-and-match group(P=0.030).CONCLUSION:Bilateral Symfony,bilateral Diff-aAY,and the combination of these two IOLs are all remarkable regarding all range vision,objective visual quality,and spectacle independence. 展开更多
关键词 diffractive bifocal extended depthof-focus intraocular lenses mix-and-match visual performance
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Gradient-inspired neural optimization for phase retrieval 认领 引用
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作者 Yang Wu Jinwei Liu Jun Wang 《Advanced Photonics Nexus》 CSCD 2026年第2期245-254,共10页
Phase retrieval is a fundamental yet challenging problem in computational imaging due to the intrinsic loss of phase information in optical measurements,leading the inverse problem highly ill-posed.Existing iterative ... Phase retrieval is a fundamental yet challenging problem in computational imaging due to the intrinsic loss of phase information in optical measurements,leading the inverse problem highly ill-posed.Existing iterative projection and model-based methods often suffer from speckle-like artifacts and limited reconstruction fidelity.Recent advances in deep learning have enabled rapid phase inference,but network-based approaches face challenges in dataset construction,generalization,and interpretability.Here,we introduce a gradient-inspired neural optimization framework that embeds a closed-form gradient from the physical forward model into the neural learning process.This hybrid design retains the interpretability and determinism of physics-based modeling while leveraging the expressive power of neural representations,enabling robust and accurate phase recovery.We demonstrate the efficacy of this approach through proof-of-principle experiments on multiplane phase retrieval and Fourier ptychographic microscopy,achieving a favorable balance between reconstruction quality and computational efficiency compared with conventional optimization and untrained network methods.Our framework establishes a unified paradigm that combines physical modeling and neural optimization,and it can be generalized to other computational imaging applications. 展开更多
关键词 phase retrieval computational imaging Fourier ptycholography coherent diffraction imaging
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Research on error performance of underwater OAM multiplexing optical communication assisted by deep learning 认领 引用
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作者 Aiping HUANG Yi CAO +1 位作者 Honglin WANG Linwei TAO 《Optoelectronics Letters》 EI 2026年第5期261-267,共7页
In this paper,a novel convolutional neural network(CNN)assisted decoding method is proposed to recover information directly for underwater orbital angular momentum(OAM)multiplexing optical communication.The effects of... In this paper,a novel convolutional neural network(CNN)assisted decoding method is proposed to recover information directly for underwater orbital angular momentum(OAM)multiplexing optical communication.The effects of various attenuations and ocean water types,such as absorption,scattering,turbulence fading,noise and diffraction,are considered comprehensively in our analysis.A regularly spaced continuous phase screen is used to represent ocean turbulence.And the angular diffraction function is exploited for simulating the propagation of the OAM beams.In order to minimize the bit error rate(BER)and simplify the receiver design,a CNN assisted decoding method is used to compensate the distorted OAM light and decode the transmission data directly without channel estimation and equalization.The CNN is trained to learn the multiplexed OAM light intensity map generated under various water environments.The bit error performance of CNN OAM system is also compared with that of traditional Gerchberg-Saxton(GS)algorithm.Our numerical simulation results indicate that the CNN assisted method combats the impairing effects of fading and improves the underwater OAM system performance obviously.Furthermore,it outperforms GS algorithm in almost all the turbulence environments at the same water environment.And the BER of the CNN assisted system still decreases effectively by increasing signal-to-noise ratio(SNR)even in moderate and strong turbulence situations while at the same time requiring less computation complexity. 展开更多
关键词 angular diffraction function underwater orbital angular recover information directly regularly spaced continuous phase screen Convolutional Neural Network CNN Deep Learning convolutional neural network cnn assisted Underwater Optical Communication
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Structure and transport properties of HoNiO3under high pressure 认领 引用
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作者 Liyan Wang Di Peng +12 位作者 Yuchen Cui Yiming Wang Jingxin Gao Tao Luo Zhikai Zhu Kejun Bu Yuzhu Wang Sibo Zhan Jikun Chen Huaqing Xie Zihua Wu Hongliang Dong Zhidan Zeng 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期117-124,共8页
Rare-earth nickelate(ReNiO3,with Re≠La)constitutes a paradigmatic class of strongly correlated electron systems,exhibiting a remarkable tunability of the metal-insulator transition(MIT)in response to external stim... Rare-earth nickelate(ReNiO3,with Re≠La)constitutes a paradigmatic class of strongly correlated electron systems,exhibiting a remarkable tunability of the metal-insulator transition(MIT)in response to external stimuli such as hydrostatic pressure,temperature,and chemical doping.This tunability arises from the competitive interplay among charge,spin,and orbital degrees of freedom.However,the fundamental mechanisms governing the effective control of the MIT under extreme conditions,particularly the intricate coupling between lattice dynamics and electronic localization,remain elusive.This knowledge gap poses a significant challenge to both fundamental research and practical applications of these materials.Herein,we present a systematic investigation of the structural phase transitions and electrical transport properties of HoNiO3under extreme conditions.In situ high-pressure x-ray diffraction(XRD)analysis uncovers a structural evolution pathway:an initial transition from a monoclinic insulating phase(P21)to an orthorhombic metallic phase(Pbnm)at approximately 17 GPa,followed by the emergence of a mixed-phase region(Pbnm and R3c)at approximately 35 GPa.Complementary electrical transport measurements reveal a pronounced sensitivity of the metal-insulator transition temperature(TMIT)to the synergistic effects of high pressure and low temperature.These findings not only provide crucial experimental evidence for elucidating the structure-property relationship in HoNiO3under extreme conditions,but also lay a conceptual foundation for designing advanced functional devices based on ReNiO3materials,with promising applications in high-sensitivity pressure sensors and temperature-responsive switches featuring tunable activation thresholds. 展开更多
关键词 metal–insulator transition (MIT) electrical transport properties high pressure x-ray diffraction (XRD)
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Designing oxide-ion conductor in superstructural barium tellurate 认领 引用
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作者 Wei Wang Guohong Cai +2 位作者 Guanqun Cai Junliang Sun Man-Rong Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第6期701-705,共5页
Searching for new oxide-ion conductors is of great significance in energy-related technologies.Here we identified a novel barium tellurate,Ba10.55Te4.45O23.90,by chemical screening for superstructural oxide-ion conduc... Searching for new oxide-ion conductors is of great significance in energy-related technologies.Here we identified a novel barium tellurate,Ba10.55Te4.45O23.90,by chemical screening for superstructural oxide-ion conductors.Its crystal structure,solved from polycrystalline specimen by the combination of three-dimension electron diffraction,X-ray diffraction,and neutron diffraction,adopts a quadruple(4×4×4)cubic superstructure(Fm-3m,a=17.30612(2)Å)and can be regarded as a derivative of ABO3perovskite like(Ba1.75□0.25)ABaBWB’O5.75□0.25.The ordered A-site metal vacancies and disordered oxygen vacancies are responsible for the enlarged superstructure.The titled compound is indeed an oxide-ion conductor but shows rather low ionic conductivity,owing to the high inter-polyhedral energy barrier of ionic migration.The discoveries unveil a new structural type for oxide-ion conductor exploration,and will evoke performance improvement by chemical modification such as aliovalent substitution. 展开更多
关键词 Oxide-ion conductor Electron diffraction Superstructure Oxide defect Ion-migration mechanism
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OEA founding issue cover technology achieves listing on the New York stock exchange 认领 引用
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作者 Zheting Meng Lianwei Chen +2 位作者 Mingbo Pu Xiangang Luo Minghui Hong 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第3期1-4,共4页
Conventional optical microscopy is fundamentally constrained by the optical diffraction limit(~200 nm),restricting the observation of nanoscale features in advanced manufacturing.To address this challenge,a remotemode... Conventional optical microscopy is fundamentally constrained by the optical diffraction limit(~200 nm),restricting the observation of nanoscale features in advanced manufacturing.To address this challenge,a remotemode microsphere-enabled nanoscale imaging technology has been developed and successfully translated from laboratory innovation to industrial application.By utilizing a suspended transparent microsphere as a miniature lens,the system enables real-time,non-contact optical imaging and resolves 23 nm gaps on silicon wafers and 77 nm metal probes in hard-disk magnetic heads through reverse optical-path reconstruction of virtual images.The technology has been commercialized by PHAOS Technology,achieving over 300%annual sales growth and receiving the"Manufacturing Technology Disruptor of the Year"award.By integrating a universal lens adapter,the system allows a standard 20×objective to achieve imaging performance comparable to a 50×objective at only one-tenth of the cost of high-end super-resolution systems.This approach represents an important advancement in scalable and costeffective nanometrology,providing a practical solution for real-time semiconductor inspection and industrial quality control. 展开更多
关键词 optical microscopy nano-imaging label-free optical diffraction limit
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