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How to Coadd Images.Ⅱ.Anti-aliasing and PSF Deconvolution

Research in Astronomy and Astrophysics 2024年第4期24卷 103-113页

作者： Lei Wang Huanyuan Shan lin nie Dezi Liu Zhaojun Yan Guoliang Li Cheng Cheng Yushan Xie Han Qu Wenwen Zheng Xi Kang Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China National Basic Science Data Center Beijing 100190China Zhejiang University-Purple Mountain Observatory Joint Research Center for Astronomy Zhejiang UniversityHangzhou 310030China Shanghai Astronomical Observatory Shanghai 200030China Key Laboratory of Radio Astronomy and Technology Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Department of Information Engineering Wuhan Institute of CityWuhan 430083China South-Westem Institute for Astronomy Research Yunnan UniversityKunming 650500China The Shanghai Key Lab for Astrophysics.Shanghai Normal University Shanghai200234China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

We have developed a novel method for co-adding multiple under-sampled images that combines the iteratively reweighted least squares and divide-and-conquer *** approach not only allows for the anti-aliasing of the images but also enables Point-Spread Function(PSF)deconvolution,resulting in enhanced restoration of extended sources,the highest peak signal-to-noise ratio,and reduced ringing *** test our method,we conducted numerical simulations that replicated observation runs of the China Space Station Telescope/the VLT Survey Telescope(VST)and compared our results to those obtained using previous *** simulation showed that our method outperforms previous approaches in several ways,such as restoring the profile of extended sources and minimizing ringing ***,because our method relies on the inherent advantages of least squares fitting,it is more versatile and does not depend on the local uniformity hypothesis for the ***,the new method consumes much more computation than the other approaches.

关键词： methods:analytical techniques:image processing gravitational lensing:weak (ISM:)cosmic rays

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人工智能生成内容的著作权法之辩

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南昌大学学报（人文社会科学版） 2024年第1期55卷 107-118页

作者：刘少军聂琳峰中国政法大学民商经济法学院北京100088

根据输入指令与输出内容的比例关系,可将人工智能生成内容依次分为孪生内容、伴生内容和原生内容。人工智能生成内容主要涉及三个著作权法问题。一是机器阅读的法律性质问题,法定许可说能更好地兼顾著作权专有属性与公有属性,实现权利... 详细信息

根据输入指令与输出内容的比例关系,可将人工智能生成内容依次分为孪生内容、伴生内容和原生内容。人工智能生成内容主要涉及三个著作权法问题。一是机器阅读的法律性质问题,法定许可说能更好地兼顾著作权专有属性与公有属性,实现权利行使与限制的动态平衡。二是生成内容的可著作权性问题,需要结合内容类型并考虑输入指令的潜在影响。同比例复制的孪生内容不属于作品,差异化表达的伴生内容属于演绎作品,创造性表现的原生内容属于原创作品。三是生成内容的著作权归属问题,除另有协议外,需要结合内容类型并考虑所有者、使用者的贡献程度。孪生内容因不属于作品,无人享有著作权;所有者、使用者对伴生内容的形成均有重大贡献,基于概括合作行为与意识,所有者、使用者共同享有著作权;只有所有者对原生内容的形成具有重大贡献,所有者单独享有著作权。

关键词：人工智能人工智能生成内容著作权法 ChatGPT

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具有环境传播和复发的年龄结构传染病模型研究

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东北师大学报（自然科学版） 2024年第2期56卷 27-35页

作者：王慧馨曹祯聂麟飞新疆大学数学与系统科学学院新疆乌鲁木齐830046

基于潜伏者、恢复者和环境中病原体的舱室年龄(即类年龄结构),提出了一类具有环境传播和复发的多组类年龄结构媒介传染病模型,给出了基本再生数R_(0)的准确表达式,并通过构造Lyapunov函数研究模型的全局动力学.结果表明:当R_(0)1时,地... 详细信息

基于潜伏者、恢复者和环境中病原体的舱室年龄(即类年龄结构),提出了一类具有环境传播和复发的多组类年龄结构媒介传染病模型,给出了基本再生数R_(0)的准确表达式,并通过构造Lyapunov函数研究模型的全局动力学.结果表明:当R_(0)1时,地方病平衡点是全局渐近稳定的.

关键词：媒介传染病环境传播年龄结构基本再生数稳定性

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Optical design of a novel near-infrared phase contrast imaging(NI-PCI)diagnostic on the HL-2A tokamak

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Plasma Science and Technology 2024年第3期26卷 31-37页

作者：徐皓龚少博余羿许敏兰涛王志斌石中兵聂林赵光义刘灏周艺轩袁子豪肖晨雨陈坚 Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People's Republic of China Southwestern Institute of Physics Chengdu 610041People's Republic of China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026People's Republic of China

The optical design of near-infrared phase contrast imaging(NI-PCI)diagnosis on HL-2A is introduced in this *** scheme benefits from the great progress of near-infrared laser technology and is a broadening of traditional phase contrast *** diagnostic can work as a keen tool to measure plasma wavenumber spectra by inferring string-integrated plasma density *** of both the front optical path which is the path before the laser transmitting into the tokamak plasma and the rear optics which is the path after the laser passing through the plasma is *** 1550 nm laser is chosen as the probe beam and highprecision optical components are designed to fit the laser beam,in which a phase plate with a 194-nm-deep silver groove is the *** with the conventional 10.6μm laser-based PCI system on HL-2A,NI-PCI significantly overcomes the unwanted phase scintillation effect and promotes the measurement capability of high-wavenumber turbulence with an increased maximal measurable wavenumber from 15 cm^(-1)to 32.6 cm^(-1).

关键词： phase contrast imaging near infrared laser plasma laser diagnostic

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A dual-route optical emission spectroscopy diagnostic with wide spectral range and high wavelength resolution on HL-2A tokamak

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Plasma Science and Technology 2024年第3期26卷 25-30页

作者：陈越高继昆龙婷聂林高金明马尧黄渊田文静刘延民朱晓东庄革钟武律许敏 School of Physical Sciences School of Nuclear Sciences and TechnologyUniversity of Science and Technology of ChinaHefei 230026People's Republic of China Southwestern Institute of Physics Chengdu 610041People's Republic of China Tsinghua University Beijing 100084People's Republic of China

A dual-route optical emission spectroscopy(D-OES)diagnostic is newly developed to monitor the optical emission from the X-point plasma region on the HL-2 A *** diagnostic is composed of an imaging system,a beam-splitting system for dual-route measurements,fiber bundles,a spectrometer system,and a control and acquisition *** route is used to obtain wide-spectral-range spectra,and the other route is used to acquire high-wavelengthresolution line *** spectral resolution of the wide-range spectrometers is 0.8 nm with a coverage of 800 nm(@200-1000 nm).The spectral resolution of the high-resolution spectrometer is 0.01 nm with a coverage of 6 nm(@200-660 nm).The spatial resolution of each route of D-OES is about 4 cm with 11 *** temporal resolution is 16 ms at maximum in the single-channel ***-range spectra(containing Balmer series and a Fulcher band)and highly resolved Ha line shapes are obtained by D-OES in the hydrogen glow discharge in the lab.D-OES measurements are carried out in the high-density deuterium experiments of *** electron density n_(e)and deuterium temperature T_(D) in the X-point multifaceted asymmetric radiation from the edge(MARFE)region are derived simultaneously by fitting the measured D_(a) *** density n_(e)is observed to increase from~8.7×10^(18)m^(-3)to~7.8×10^(19)m^(-3),and the temperature T_(D)drops from~14.4 eV to~2.3 eV after the onset of MARFE in the discharge#38260.

关键词： optical emission spectroscopy Balmer series tokamak

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Progress of Lyman-alpha-based beam emission spectroscopy(Ly BES)diagnostic on the HL-2A tokamak

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Plasma Science and Technology 2024年第3期26卷 118-125页

作者：周艺轩余羿许敏柯锐聂林徐皓赵光义刘灏袁子豪肖晨雨李继全肖池阶 the HL-2A Team Southwestern Institute of Physics Chengdu 610041People's Republic of China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People's Republic of China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871People's Republic of China

An edge Lyman-alpha-based beam emission spectroscopy(LyBES)diagnostic,using a heating NBI(neutral beam injection)system,is currently under development on the HL-2A *** 20-channel edge LyBES,which is intended to measure the density fluctuation in plasma edge(from R=1960 mm to R=2026 mm)with an improved spatial resolution of 3.3 mm,is a complement to the existing conventional beam emission spectroscopy(BES)*** this article,we introduce the progress of LyBES diagnostic,including the collection optics,the monochromator,and the detector *** reflectance of the collection mirrors is measured to be~82%at 122 nm,and the aberration geometrical radius of the collection optics is tested to be~150μm in the aimed *** linear dispersion of the LyBES monochromator is designed to be~0.09 nm mm^(-1).The bandwidth of the detector system with the 5×10^(7)V A^(-1)preamplifier gain is measured to be~280 kHz,and the peak-to-peak noise of the detector system is tested to be~16 *** finalized design,components development and testing of the LyBES diagnostic have been completed at present,and an overall performance of the LyBES diagnostic is to be confirmed in the next HL-2A campaign.

关键词： density fluctuation Ly BES BES vacuum ultraviolet

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基于区域特征细化感知学习的星载SAR图像有源压制干扰抑制方法

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雷达学报 2024年第5期13卷 985-1003页

作者：聂林韦顺军李佳慧张浩师君王谋陈思远张鑫焱电子科技大学信息与通信工程学院北京控制与电子技术研究所

星载合成孔径雷达(SAR)系统常受到强电磁干扰而导致成像质量下降，但现有基于图像域的干扰抑制方法易造成图像失真、纹理细节信息丢失等难题。针对上述问题，该文提出了一种基于区域特征细化感知学习的星载SAR图像有源压制干扰抑制方法... 详细信息

星载合成孔径雷达(SAR)系统常受到强电磁干扰而导致成像质量下降，但现有基于图像域的干扰抑制方法易造成图像失真、纹理细节信息丢失等难题。针对上述问题，该文提出了一种基于区域特征细化感知学习的星载SAR图像有源压制干扰抑制方法。首先，建立了星载SAR图像域有源压制干扰信号和图像模型；其次，设计一种基于区域特征感知的高精度干扰识别网络，利用高效通道注意力机制，提取SAR图像有源压制干扰图样特征，可以有效识别SAR图像干扰区域；然后，构建一种基于SAR图像和压制干扰特征联合学习的多元区域特征细化干扰抑制网络，将SAR图像切分为多元区域，采用多模块协同处理多元区域上的压制干扰特征，实现复杂场景条件下SAR图像有源压制干扰的精细化抑制。最后，构建SAR图像有源压制干扰仿真数据集，且采用哨兵1号实测数据进行实验验证分析。实验结果表明所提方法能有效识别和抑制星载SAR图像多种典型有源压制干扰。

关键词：星载SAR图像深度学习干扰识别干扰抑制有源压制干扰

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An improved TDE technique for derivation of 2D turbulence structures based on GPI data in toroidal plasma

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Plasma Science and Technology 2024年第3期26卷 131-137页

作者：王威策程钧石中兵严龙文黄治辉弋开阳吴娜何钰邹千陈熙张文陈建聂林季小全钟武律 Southwestern Institute of Physics Chengdu 610299People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China

This paper reports an improved time-delay estimation(TDE)technique for the derivation of turbulence structures based on gas-puff imaging *** improved TDE technique,integrating an inverse timing search and hierarchical strategy,offers superior accuracy in calculating turbulent velocity field maps and analyzing blob dynamics,which has the power to obtain the radial profiles of equilibrium poloidal velocity,blob size and its radial velocity,even the fluctuation analysis,such as geodesic acoustic modes and quasi-coherent mode,*** improved technique could provide important 2D information for the study of edge turbulence and blob dynamics,advancing the understanding of edge turbulence physics in fusion plasmas.

关键词： gas-puff imaging TDE method turbulence velocity field map

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Stochastic dynamics of the transmission of Dengue fever virus bet ween mosquit oes aiul humans

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International Journal of Biomathematics 2021年第7期14卷 329-352页

作者： Manjing Guo lin Hu lin-bei nie College of Mathematics and System Science Xinjiang University Urumqi830046P.R.China

Considering the impact of environmental white noise on the quantity and behavior ofvector of disease,a stochastic differential model describing the transmission of Denguefever between mosquitoes and humans,in this paper,is *** using Lyapunovmethods and Ito's formula,we first prove the existence and uniqueness of a globalpositive solution for this ***,some sufficient conditions for the extinction andpersistence in the mean of this stochastic model are obtained by using the techniquesof a series of stochastic *** addition,we also discuss the existence of aunique stationary distribution which leads to the stochastic persistence of this ***,several numerical simulations are carried to illustrate the main results of thiscontribution.

关键词： Dengue model stochastic perturbation persistence and extinction in the mean stationary distribution

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A New Monoterpene Glycoside from Swertia punicea

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Chinese Chemical Letters 2000年第8期11卷 709-710页

作者： Xin MING Ming Hua QIU Rui lin nie Guo lin ZHANG Kunming Institute of Botany Chinese Academy of SciencesKunming 650204 Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041

A new monoterpene glycoside, 2,6-dimethyl-2E,6E-octadienoic acid 1,6'-lactone 8-beta-D-glucopyranoside, was isolated from Swertia punicea, accompanying with six known compounds 1-O-primeverosyl-3,7-dimethoxy-8-hydroxyxanthone, 1-O-primeverosyl-3,7,8-tri-methoxyxan-thone, epi-eustomoside, 1-hydroxy-3,7,8-trimethoxyxanthone, 1,8-dihydroxy-3,7-dimethoxy xanthone and isovitexine. Their structures were elucidated based on spectral evidence.

关键词： Swertia punicea monoterpene glycoside xanthone epi-eustomoside isovitexine

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