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浏览/检索结果: 共89条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 An innovative 16-bit projection display based on quaternary hybrid light modulation 期刊论文  OAI收割 Optics and Lasers in Engineering, 2024, 卷号: 178 作者:  Pan, Yue;  Cao, Yajie;  Xu, Liang;  Hu, Motong;  Jiang, Qing   |  收藏  |  浏览/下载：21/0  |  提交时间：2024/06/03 Instrumentation  Optical imaging  Projection methods  Intensity modulation  Image alignment   Coupled generalized nonlinear Schrodinger equations solved by adaptive step size methods in interaction picture 期刊论文  OAI收割 CHINESE PHYSICS B, 2023, 卷号: 32, 期号: 2, 页码: 24213 作者:  Chen L;  Li P(李磐);  Liu HS(刘河山);  Yu, Jin;  Ke, ChangJun   |  收藏  |  浏览/下载：21/0  |  提交时间：2023/04/20 nonlinear optics  optical propagation in nonlinear media  coupled generalized nonlinear Schrodinger equations (C GNLSE)  adaptive step size methods   10 kW rectangular laser beam generation with incoherent space combiner 期刊论文  OAI收割 Optik, 2022, 卷号: 260 作者:  Tian, Xiao;  Bai, Yang;  Lei, Guangzhi;  Yu, Lidong;  Zhou, Jingfeng   |  收藏  |  浏览/下载：83/0  |  提交时间：2022/05/07 Incoherent space laser beam combination  10 kW beam combiner  Rectangular uniform beam spot  Multi-beam laser volumetric heat source  Finite element methods  Optical lens  Thermo-mechanical properties   Soil moisture retrieval from remote sensing measurements: Current knowledge and directions for the future 期刊论文  OAI收割 EARTH-SCIENCE REVIEWS, 2021, 卷号: 218, 页码: 24 作者:  Li, Zhao-Liang;  Leng, Pei;  Zhou, Chenghu;  Chen, Kun-Shan;  Zhou, Fang-Cheng   |  收藏  |  浏览/下载：28/0  |  提交时间：2021/08/19 Soil moisture  Remote sensing  Optical  thermal  Microwave  Retrieval methods   Soil moisture retrieval from remote sensing measurements: Current knowledge and directions for the future 期刊论文  OAI收割 EARTH-SCIENCE REVIEWS, 2021, 卷号: 218, 页码: 24 作者:  Li, Zhao-Liang;  Leng, Pei;  Zhou, Chenghu;  Chen, Kun-Shan;  Zhou, Fang-Cheng   |  收藏  |  浏览/下载：17/0  |  提交时间：2021/08/19 Soil moisture  Remote sensing  Optical  thermal  Microwave  Retrieval methods   Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文  OAI收割 The Astrophysical Journal, 2020, 卷号: 901, 页码: L7 作者:  HXMT   |  收藏  |  浏览/下载：22/0  |  提交时间：2022/02/08 Radio transient sources  Magnetars  Soft gamma-ray repeaters  2008  992  1471  Astrophysics - High Energy Astrophysical Phenomena  Astrophysics - Instrumentation and Methods for Astrophysics  Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of AJ = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR ? 0.025 (fluence index ?0.35).   Existence of optical vortices in R-2 期刊论文  OAI收割 NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS, 2019, 卷号: 50, 页码: 67-85 作者:  Guo, Qing;  Cao, Daomin;  Li, Hang   |  收藏  |  浏览/下载：69/0  |  提交时间：2020/01/10 Optical vortices  Variational methods  Concentration compactness  Nodal solutions   Formation peculiarities and optical properties of highly-doped (Y(0.86)La(0.09)Vb(0.05))(2)O-3 transparent ceramics 期刊论文  OAI收割 CERAMICS INTERNATIONAL, 2019, 卷号: 45, 期号: 13, 页码: 16002 作者:  Kryzhanovska, O. S.;  Baumer, V. N.;  Parkhomenko, S., V;  Doroshenko, A. G.;  Yavetskiy, R. P.   |  收藏  |  浏览/下载：56/0  |  提交时间：2019/12/26 Sintering  X-ray methods  Optical properties  Y2O3  Functional application   Algorithms for surveying and cataloguing space debris utilizing a wide field of view telescope 期刊论文  OAI收割 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2019, 卷号: 71, 期号: 4, 页码: 10 作者:  Sun, Rongyu;  Yu, Shengxian;  Zhao, Changyin;  Zhang, Wei   |  收藏  |  浏览/下载：71/0  |  提交时间：2019/10/21 techniques: image processing  methods: data analysis  Astrometry  optical surveys  space debris   Target geo-location based on laser range finder for airborne electro-optical imaging systems 期刊论文  OAI收割 Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2019, 卷号: 27, 期号: 1, 页码: 8-16 作者:  H.Zhang;  C.Qiao;  H.-P.Kuang   |  收藏  |  浏览/下载：52/0  |  提交时间：2020/08/24 Extended Kalman filters,Control nonlinearities,Error analysis,Geodesy,Image enhancement,Imaging systems,Locks (fasteners),Mean square error,Measurement errors,Monte Carlo methods,Optical image storage,Position measurement,Radar equipment