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True-temperature inversion algorithm for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization
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作者 Mei Liang Zhuo Sun +3 位作者 Jiasong Liu Yongsheng Wang Lei Liang Long Zhang 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2024年第1期55-62,共8页
Herein,a method of true-temperature inversion for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization is proposed for difficult inversion problems with unknown emissivity.Fractional-order... Herein,a method of true-temperature inversion for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization is proposed for difficult inversion problems with unknown emissivity.Fractional-order calculus has the inherent advantage of easily jumping out of local extreme values;here,it is introduced into the particle-swarm algorithm to invert the true temperature.An improved adaptive-adjustment mechanism is applied to automatically adjust the current velocity order of the particles and update their velocity and position values,increasing the accuracy of the true temperature values.The results of simulations using the proposed algorithm were compared with three algorithms using typical emissivity models:the internal penalty function algorithm,the optimization function(fmincon)algorithm,and the conventional particle-swarm optimization algorithm.The results show that the proposed algorithm has good accuracy for true-temperature inversion.Actual experimental results from a rocket-motor plume were used to demonstrate that the true-temperature inversion results of this algorithm are in good agreement with the theoretical true-temperature values. 展开更多
关键词 Fractional-order particle swarm True-temperature inversion algorithm multi-wavelength pyrometer
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The Theoretical Analysis of Multi-wavelength Pyrometer:Check and Autosearch for Emissivity General Expression 被引量:6
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作者 孙晓刚 徐文辉 褚载祥 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1998年第3期36-40,共5页
In general, the dependence of the logarithm of the emissivity upon wavelength is usually used in the treatment of data measured by multi-wavelength pyrometer. In this paper, the suitability of this expression for diff... In general, the dependence of the logarithm of the emissivity upon wavelength is usually used in the treatment of data measured by multi-wavelength pyrometer. In this paper, the suitability of this expression for different materials has been examined. Further more, an effective method for automatically searching the mathematical model between emissivity and wavelength has been procsed. The calculated results show that the accuracy is improved by using this data treatment method. 展开更多
关键词 multi-wavelength PYROMETER EMISSIVITY FITTING
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Terahertz Generation Using Implanted InGaAs Photomixers and Multi-wavelength Quantum Dot Lasers 被引量:1
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作者 Y.Hou J.R.Liu +6 位作者 M.Buchanan A.J.Spring Thorpe P.J.Poole H.C.Liu Ke Wu Sjoerd Roorda X.P.Zhang 《Nano-Micro Letters》 SCIE EI CAS 2012年第1期10-13,共4页
We report on a study of terahertz(THz) generation using implanted In Ga As photomixers and multi-wavelength quantum dot lasers. We carry out In Ga As materials growth, optical characterization, device design and fabri... We report on a study of terahertz(THz) generation using implanted In Ga As photomixers and multi-wavelength quantum dot lasers. We carry out In Ga As materials growth, optical characterization, device design and fabrication, and photomixing experiments. This approach is capable of generating a comb of electromagnetic radiation from microwave to terahertz. For shortening photomixer carrier lifetime, we employ proton implantation into an epitaxial layer of lattice matched In Ga As grown on InP. Under a 1.55 μm multimode In GaAs/In GaAsP quantum dot laser excitation, a frequency comb with a constant frequency spacing of 50 GHz generated on the photomixer is measured, which corresponds to the beats of the laser longitudinal modes. The measurement is performed with a Fourier transform infrared spectrometer. This approach affords a convenient method to achieve a broadband multi-peak coherent THz source. 展开更多
关键词 Proton implanted In Ga As Trahertz Photomixer multi-wavelength quantum dot laser Fourier transform infrared spectroscopy
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Multi-wavelength continuous-wave Nd:YVO4 self-Raman laser under in-band pumping
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作者 樊莉 赵孝冬 +4 位作者 张蕴川 顾晓东 万浩鹏 范会博 朱骏 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第8期184-189,共6页
Multi-wavelength continuous-wave self-Raman laser with an a-cut composite YVO4/Nd:YVO4/YVO4 crystal pumped by an 879-nm wavelength-locked laser diode is demonstrated for the first time.Multi-wavelength Raman lasers at... Multi-wavelength continuous-wave self-Raman laser with an a-cut composite YVO4/Nd:YVO4/YVO4 crystal pumped by an 879-nm wavelength-locked laser diode is demonstrated for the first time.Multi-wavelength Raman lasers at 1168.4,1176,1178.7,and 1201.6 nm are achieved by the first Stokes shift of the multi-wavelength fundamental lasers at 1064,1066.7,1073.6,1084,and 1085.6 nm with two Raman shifts of 890 and 816 cm^-1.A maximum Raman output power of 2.56 W is achieved through the use of a 20-mm-long composite crystal,with a corresponding optical conversion efficiency of 9.8%.The polarization directions of different fundamental and Raman lasers are investigated and found to be orthogonalπandσpolarizations.These orthogonally polarized multi-wavelength lasers with small wavelength separation pave the way to the development of a potential laser source for application in spectral analysis,laser radar and THz generation. 展开更多
关键词 multi-wavelength CONTINUOUS-WAVE self-Raman laser in-band PUMPING
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Development of Multi-Wavelength Spectral-Correction Method
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作者 Hong Wen GAO (School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第10期893-894,共2页
This investigation developed a new method for determining metal complex's property containing the stepwise real absorptivity(epsilon) and stability constant (K-m). The correction equation of the multi-wavelength s... This investigation developed a new method for determining metal complex's property containing the stepwise real absorptivity(epsilon) and stability constant (K-m). The correction equation of the multi-wavelength spectral absorption was established for the simultaneous determination of various complexes to give high accuracy for trace analysis. This method was more acceptable in theory and simpler in operation than the classical methods. 展开更多
关键词 simultaneous determination multi-wavelength spectral-correction complex property
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Monte-Carlo Studies and Computer Modelling of Multi-wavelength Pyrometry
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作者 裴越 戴景民 褚载祥 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1996年第2期20-25,共6页
Monte-CarloStudiesandComputerModellingofMulti-wavelengthPyrometry¥PEIYue;DAIJingmin;CHUZaixiang(裴越,戴景民,褚载祥)(D... Monte-CarloStudiesandComputerModellingofMulti-wavelengthPyrometry¥PEIYue;DAIJingmin;CHUZaixiang(裴越,戴景民,褚载祥)(Dept.ofPreciseInst... 展开更多
关键词 ss: multi-wavelength PYROMETRY Monte-Carlo method COMPUTER MODELLING ERROR analysis
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Multi-wavelength laser active coherent combination
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作者 韩凯 许晓军 刘泽金 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第5期247-253,共7页
A seed laser oscillating at different frequencies is proved to have the potential to mitigate the stimulated Brillouin scattering(SBS) effect in a fiber amplifier,which may increase the emission power of a coherent ... A seed laser oscillating at different frequencies is proved to have the potential to mitigate the stimulated Brillouin scattering(SBS) effect in a fiber amplifier,which may increase the emission power of a coherent beam combination(CBC) system greatly.In this study,a basic mathematical model describing the multi-wavelength CBC is proposed on the fundamentals of CBC.A useful method for estimating the combination effect and analysing the feasibility and the validity of the multi-wavelength coherent combination is provided.In the numerical analysis,accordant results with four-wavelength four-channel CBC experiments are obtained.Through calculations of some examples with certain spectra,the unanticipated excellent combination effect with a few frequencies involved is explained,and the dependence of the combination effect on the variance of the amplifier chain length and the channel number is clarified. 展开更多
关键词 fiber laser coherent beam combination multi-wavelength laser optical path difference
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LOW FLYING HEIGHT MEASUREMENT WITH MULTI-WAVELENGTH INTERFEROMETRY
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作者 WANG Wei LAI Wuxing +2 位作者 SHI Tielin TAO Wei CHENG Xinjian 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第3期108-111,共4页
A method for measurement of ultra-low flying height in head-disk spacing is described. Three different wavelengths are selected out from white light by filters to measure the spacing simultaneously. Besides solving th... A method for measurement of ultra-low flying height in head-disk spacing is described. Three different wavelengths are selected out from white light by filters to measure the spacing simultaneously. Besides solving the ambiguity problem, a more reliable result is achieved by using weighted average of measurement results from three different wavelengths, where the weight is dependent upon spacing. Fringe-bunching correction algorithm (FBC) and spot-tilling technique are adopted to suppress calibration and random errors. Moreover, incident bandwidth correction (IBC) method is introduced to compensate the error caused by low monochromaticity of incident light. Based on dynamic flying height tester (DFHT Ⅱ), with the redesigned of photo-electric conversion and signal acquirement module, an instrument has been developed. And comparing the experimental data from the instrument with those from a KLA-FHT D6, the discrepancy is less than 5%. It indicates that the instrument is suitable to perform ultra-low flying height measurement and satisfies the reauirement of magnetic heads manufacturing. 展开更多
关键词 Flying height measurement multi-wavelength interferometry Incident bandwidth
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Switching,explosion,and chaos of multi-wavelength soliton states in ultrafast fiber lasers
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作者 Zhi-Zeng Si Yue-Yue Wang Chao-Qing Dai 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2024年第7期82-90,共9页
Because of the complexity and difficulty of realizing a multi-wavelength soliton state,reports on its internal dynamic characteristics are scarce.In this study,the switching and periodic soliton explosion processes of... Because of the complexity and difficulty of realizing a multi-wavelength soliton state,reports on its internal dynamic characteristics are scarce.In this study,the switching and periodic soliton explosion processes of the multi-wavelength soliton state in a negative dispersion passively mode-locked fiber laser are realized.The generation of the multi-wavelength soliton state undergoes the process of noise,oscillation,and stable mode-locking,and the splitting and annihilation of solitons with different group velocities directly impact the generation and disappearance of three wavelengths.Positive and negative dispersion lead to different group velocities of solitons.The presence and displacement of solitons with different group velocities cause soliton collisions,which lead to soliton explosions.A soliton experiences relative phase oscillation,chaos,and oscillation,as well as convergence and separation before and after an explosion.With an increase in parameters related to pump power,single-soliton oscillation,multi-wavelength solitons,and chaos are found in experiments and simulations,proving the relevance and reliability between simulation and experimental results.This work promotes the dynamical study of multi-soliton collisions in nonlinear science and the development of chaos theory in multi-comb lasers. 展开更多
关键词 multi-wavelength fiber laser soliton explosion CHAOS state switching real-time dynamics
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旅游目的地竞争力模型比较研究 被引量:17
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作者 赵磊 庄志民 《旅游学刊》 CSSCI 北大核心 2008年第10期47-53,共7页
本文总结分析了国内外学者所构建的旅游目的地竞争力模型,并将其分为旅游目的地竞争力的概念性模型、简约性模型和多视角模型。通过对三类旅游目的地竞争力模型的比较研究,分析得出各自的优缺点,进而提出相关的补充建议。
关键词 旅游目的地竞争力模型 比较研究 建议
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逆作法施工深基坑安全稳定性分析 被引量:7
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作者 王绍君 李守涛 +2 位作者 周婷 凌贤长 唐亮 《土木工程学报》 EI CSCD 北大核心 2013年第S1期314-318,共5页
土体的稳定和变形是密不可分的,由于土体材料本身可能具有应变软化特性,失稳破坏首先开始于土体内最薄弱的区域,逐渐贯穿,因此土坡破坏是一个局部破坏逐渐扩展以至贯通形成滑裂面的渐进破坏过程。采用有限单元法可以将稳定问题和土体内... 土体的稳定和变形是密不可分的,由于土体材料本身可能具有应变软化特性,失稳破坏首先开始于土体内最薄弱的区域,逐渐贯穿,因此土坡破坏是一个局部破坏逐渐扩展以至贯通形成滑裂面的渐进破坏过程。采用有限单元法可以将稳定问题和土体内部的应力和变形分析结合起来。本文即采用强度折减有限元方法,运用摩尔-库仑屈服准则对逆作基坑稳定进行强度折减有限差分法数值模拟,并将分析结果分别与Junbu法,瑞典条分法和Prandtl(普朗德尔)法计算结果进行对比。发现由于开挖与支护的影响,逆作法土体滑裂面有别于边坡土体滑裂面,得到支护墙体的不同位置处土体破坏模式。 展开更多
关键词 逆作法 有限差分法 强度折减 深基坑
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FDTD分析包含S参数器件模型的微波有源电路 被引量:1
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作者 李勇 苏道一 +2 位作者 陈智慧 傅德民 张小苗 《微波学报》 CSCD 北大核心 2009年第6期49-54,共6页
将有源器件的S参数引入到FDTD迭代中,传统方法采用了逆傅立叶变换和复杂的卷积技术。为了避免繁琐的卷积运算,本文首先把测量的S参数转化为Y参数,采用Vector Fitting技术拟合得到Y参数的s域有理多项式,然后通过差分技术或者Z变换技术将... 将有源器件的S参数引入到FDTD迭代中,传统方法采用了逆傅立叶变换和复杂的卷积技术。为了避免繁琐的卷积运算,本文首先把测量的S参数转化为Y参数,采用Vector Fitting技术拟合得到Y参数的s域有理多项式,然后通过差分技术或者Z变换技术将Y参数引入到FDTD运算中。另外,为了提高该方法的计算效率及稳定性,利用FDTD方法提取分布元件部分的时域特征模型(TDCM),再结合本文方法全波分析微波有源电路,达到了更好的效果。最后,作为例子模拟了一个微波FET放大器电路,验证了本文方法的有效性和精度。 展开更多
关键词 FDTD 有源器件 S参数 Vector FITTING 时域特征模型
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车载导航系统中的串行多任务数据采集
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作者 肖文平 叶家玮 《交通科技》 2004年第4期105-107,共3页
介绍如何使用 DELPHI语言实现 PC机串口分时采集磁阻传感器 TDCM3和 GPS接收机的数据 。
关键词 车载导航系统 数据采集系统 数据采集 GPS tdcm3 DELPHI语言
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40 Gbit/s传输系统的OLP解决方案研究 被引量:1
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作者 郭鑫 李盛彤 《光通信研究》 北大核心 2013年第2期9-11,38,共4页
为了寻找一种可行的针对40Gbit/s传输系统的OLP(光线路保护)解决方案,分析了40Gbit/s传输系统保护所面临的色散补偿、光功率补偿和系统OSNR(光信噪比)等方面的挑战,介绍了针对40Gbit/s传输系统的色散补偿方案,并对一个应用案例进行了分... 为了寻找一种可行的针对40Gbit/s传输系统的OLP(光线路保护)解决方案,分析了40Gbit/s传输系统保护所面临的色散补偿、光功率补偿和系统OSNR(光信噪比)等方面的挑战,介绍了针对40Gbit/s传输系统的色散补偿方案,并对一个应用案例进行了分析说明,验证了该解决方案的可行性。 展开更多
关键词 40 Gbit S系统 光线路保护 色散补偿 多波长可调式色散补偿模块 精确补偿光纤型色散补偿模块
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Enhancement of MAD/MIR phasing at low resolution and a new procedure for automatic phase extension
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作者 韩普 古元新 +1 位作者 丁玮 范海福 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第7期389-395,共7页
To achieve de novo protein structure determination of challenging cases, multi-wavelength anomalous diffraction(MAD) and multiple isomorphous replacement(MIR) phasing can be powerful tools to obtain low-resolution ini... To achieve de novo protein structure determination of challenging cases, multi-wavelength anomalous diffraction(MAD) and multiple isomorphous replacement(MIR) phasing can be powerful tools to obtain low-resolution initial phases from heavy-atom derivative datasets, then phase extension is needed against high-resolution data to obtain accurate structures.In this context, we propose a direct-methods procedure here that could improve the initial low-resolution MAD/MIR phase quality.And accordingly, an automated process for extending initial phases to high resolution is also described.These two procedures are both implanted in the newly released IPCAS pipeline.Three cases are used to perform the test, including one set of 4.17 ? MAD data from a membrane protein and two sets of MAD/MIR data with derivatives truncated down to 6.80 ? and 6.90 ?, respectively.All the results have shown that the initial phases generated from the direct-methods procedure are better than that from the conventional MAD/MIR methods.The automated phase extensions for the latter two cases starting from 6.80 ? to 3.00 ? and 6.90 ? to 2.80 ? are proved to be successful, leading to complete models.This may provide convenient and reliable tools for phase improvement and phase extension in difficult low-resolution tasks. 展开更多
关键词 direct methods multi-wavelength anomalous diffraction(MAD)/multiple isomorphous replacement(MIR) PHASING PHASE EXTENSION low-resolution
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Noise Reduction in White Light Lidar Signal Using a One-Dim and Two-Dim Daubechies Wavelet Shrinkage Method
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作者 Toshihiro Somekawa Maria Cecilia D. Galvez +2 位作者 Masayuki Fujita Edgar A. Vallar Chihiro Yamanaka 《Advances in Remote Sensing》 2013年第1期10-15,共6页
A 1-D and 2-D Daubechies 5 (db5) discrete wavelet shrinkage methods using a 10 level decomposition was applied to white light lidar data particularly at 350 nm and 550 nm backscattered signal. At 350 nm, the backscatt... A 1-D and 2-D Daubechies 5 (db5) discrete wavelet shrinkage methods using a 10 level decomposition was applied to white light lidar data particularly at 350 nm and 550 nm backscattered signal. At 350 nm, the backscattered signal is very weak as compared to 550 nm backscattered signal because of the spectral intensity distribution of the generated white light. The 1-D and 2-D wavelet shrinkage method gave a much better result as compared with the moving average method. However, the 2-D wavelet shrinkage method produced a much better denoised lidar signal compared with the 1-D wavelet shrinkage method. This is indicated by the 142% increase in correlation coefficient between the 2-D denoised lidar signal and the 800 nm original lidar signal as compared with only 12% increase in correlation coefficient for the 1-D denoised lidar signal. The 2-D wavelet shrinkage method also gave a much higher SNR value of 65.9 compared to 1-D which is 38.8. 展开更多
关键词 WHITE Light LIDAR multi-wavelength WAVELET Daubechies
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Fiber laser with simultaneous multi-wavelength Er/Yb passively Q-switched and single-wavelength Tm gain-switched operations 被引量:4
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作者 J.ALANIZ-BAYLON M.DURAN-SANCHEZ +5 位作者 R.I.ALVAREZ-TAMAYO B.POSADA-RAMIREZ M.BELLO-JIMENEZ B.IBARRA-ESCAMILLA A.A.CASTILLO-GUZMAN E.A.KUZIN 《Photonics Research》 SCIE EI CSCD 2019年第6期608-614,共7页
We report the experimental investigation of an all-fiber multi-wavelength passively Q-switched Er/Yb laser with simultaneous gain-switched pulsed operation by using a thulium-doped fiber as a saturable absorber.Laser ... We report the experimental investigation of an all-fiber multi-wavelength passively Q-switched Er/Yb laser with simultaneous gain-switched pulsed operation by using a thulium-doped fiber as a saturable absorber.Laser emission is obtained in three wavelength regions with central peaks at around 1546 nm, 1561 nm, and1862 nm. Multi-wavelength emission with separation of approximately 1 nm is obtained around the wavelength regions of 1546 nm and 1561 nm. Stable laser pulses are generated in the pump power range from 3.6 W to7.3 W. 展开更多
关键词 Fiber laser multi-wavelength
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Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited] 被引量:4
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作者 郭波 郭心宇 +3 位作者 唐李格 杨文蕾 尘秋美 任忠要 《Chinese Optics Letters》 SCIE EI CAS CSCD 2021年第7期48-55,共8页
We propose and demonstrate the cascaded multi-wavelength mode-locked erbium-doped fiber laser(EDFL) based on ultralong-period gratings(ULPGs) for the first time, to the best of our knowledge.Study found that the ULPG ... We propose and demonstrate the cascaded multi-wavelength mode-locked erbium-doped fiber laser(EDFL) based on ultralong-period gratings(ULPGs) for the first time, to the best of our knowledge.Study found that the ULPG can be used as both a mode-locker for pulse shaping and a comb filter for multi-wavelength generation simultaneously.Using the dual-function of ULPG, three-, four-, five-, six-, and seven-wavelength mode-locked pulses are obtained in EDFL, seven of which are the largest number of wavelengths up to now.For the four-wavelength soliton pulses, their pulse width is about 7.8 ps.The maximum average output power and slope efficiency of these pulses are 8.4 m W and 2.03%, respectively.Besides the conventional pulses, hybrid soliton pulses composed of a four-wavelength pulse and single soliton are also observed.Finally, the effect of cavity dispersion on the multi-wavelength mode-locked pulses is also discussed.Our findings indicate that apart from common sensing and filtering, the ULPG may also possess attractive nonlinear pulse-shaping property for ultrafast photonics application. 展开更多
关键词 ultra-long-period grating fiber laser ultrafast laser multi-wavelength
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New Solution to Surface Temperature of Casting Slab Measurement Based on Preceded Reflector and Multi-Wavelength 被引量:2
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作者 LIU Jun1, MA Jiao-cheng2, YANG Feng3, XIAO Hui1, RAO Li-min1 (1. School of Nuclear Engineering and Technology, East China Institute of Technology, Fuzhou 344000, Jiangxi, China 2. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, Liaoning, China 3. School of Civil and Environmental Engineering, East China Institute of Technology, Fuzhou 344000, Jiangxi, China) 《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2012年第8期12-16,共5页
The surface temperature of casting slab is an important parameter in the metallurgy field. Because the surface emissivity is uncertain and also unknown, it is difficult to measure the slab surface temperature accurate... The surface temperature of casting slab is an important parameter in the metallurgy field. Because the surface emissivity is uncertain and also unknown, it is difficult to measure the slab surface temperature accurately. A method based on preceded reflector and multi-wavelength was put forward to deal with the difficulty in surface temperature measurement of casting slab. On the premise of preceded reflector and non-preceded reflector, the method establishes the radiation energy equations and works out the emissivity and temperature in the equations. Also, the multilayer modeling of casting slab surface and multiple reflection-absorption process modeling were built by Monte Carlo method. The temperature measuring method had been applied in the continuous casting field. In order to verify the measured result, the thermal imaging method was adopted when the slab surface emissivity was set by repeated tests. Finally, the measured and verified temperature curves keep a same tendency and the error of the values is lower than 5℃. The comparison result shows that the method can measure temperature accurately. 展开更多
关键词 casting slab EMISSIVITY surface temperature preceded reflector multi-wavelength
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A Raman laser system for multi-wavelength satellite laser ranging 被引量:2
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作者 K.Hamal I.Prochazka J.Blazej 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2004年第6期737-743,共7页
In order to develop a laser system for multi-wavelength satellite laser ranging,the joint group of the Shanghai Astronomical Observatory and the Czech Technical University has studied the conversion efficiency of the ... In order to develop a laser system for multi-wavelength satellite laser ranging,the joint group of the Shanghai Astronomical Observatory and the Czech Technical University has studied the conversion efficiency of the Raman-shifting beam and its spatial characteristics.We adopted a 0.53 μm laser with pulse width of 35 ps and peak energy of 35 mJ,the second harmonic of a Nd:YAG actively and passively mode-locked laser,to pump a one-meter-long Raman tube which is full of H2 with high pressure at the Prague-based laboratory.We get the first Stokes laser (0.68 μm):7 mJ (single pulse) with beam divergence of 40" (arcsecond) and spatial wobbling of less than 4";and the first anti-Stokes laser (0.43 μm):2 mJ (single pulse) with divergence of 56" and spatial wobbling of less than 4".The emitting beam from the Raman cell also includes 0.53μm:10 mJ (single pulse) with divergence of 40" and spatial wobbling of less than 7".According to the radar link equation and based on the above on the above obtained multi-wavelength’s energy,we can estimate the detection probabilities for three colors respectivelyl.It is shown by the result that the developed multi-wavelength Raman laser system has the capability of satellite ranging.The Raman laser system will be installed at the laser station in Shanghai Astronomical Observatory to research the multi-wavelength satellite laser ranging. 展开更多
关键词 multi-wavelength satellite LASER ranging RAMAN laser ATMOSPHERE correction detection probability.
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