中国科学院机构知识库网格系统: 检索

GNN-Based Resource Allocation for Digital Twin-Enhanced Multi-UAV Radar Networks 期刊论文 OAI收割
IEEE WIRELESS COMMUNICATIONS LETTERS, 2024, 卷号: 13, 期号: 11, 页码: 3137-3141
作者: Luo, Jihao; Fei, Zesong; Wang, Xinyi; Zhao, Le; Li, Bin

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收藏 | 浏览/下载：11/0 | 提交时间：2024/12/06

Resource management Autonomous aerial vehicles Radar Interference Sensors Signal to noise ratio Servers Unmanned aerial vehicles radar sensing digital twin graph neural network spectrum allocation power control

A wide-band interference spectrometer based on bandpass sampling technology 会议论文 OAI收割
Hefei, China, 2020-09-25
作者: Tian, Feifei; Li, Siyuan

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收藏 | 浏览/下载：32/0 | 提交时间：2021/01/20

band-pass sampling interference spectrometer wide-band spectrum resolution signal-to-noise ratio

Research of Spectrum Signal-to-Noise Ratio of Large Aperture Static Imaging Spectrometer 期刊论文 OAI收割
spectroscopy and spectral analysis, 2014, 卷号: 34, 期号: 3, 页码: 851-856
作者: Wang Shuang; Xiangli Bin; Li Li-bo; Pi Hai-Feng

收藏 | 浏览/下载：56/0 | 提交时间：2015/07/06

Fourier transform imaging spectrometry Spectrum signal-to-noise ratio Evaluation model Radiation transmission Noise

Improvement of the sensitivity of the two-dimensional asynchronous spectroscopy based on the AOSD approach by using a modified reference spectrum 期刊论文 OAI收割
JOURNAL OF MOLECULAR STRUCTURE, 2013, 卷号: 1034, 页码: 101-111
作者: Li, Xiaopei; Bi, Quan; Liu, Shaoxuan; Chen, Jing; Yue, Shijuan

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收藏 | 浏览/下载：29/0 | 提交时间：2019/04/09

Two-dimensional Asynchronous Spectroscopy Intermolecular Interaction Reference Spectrum Sensitivity Signal-to-noise Ratio

Improvement of the sensitivity of the two-dimensional asynchronous spectroscopy based on the AOSD approach by using a modified reference spectrum 期刊论文 OAI收割
JOURNAL OF MOLECULAR STRUCTURE, 2013, 卷号: 1034, 期号: 0, 页码: 101-111
作者: Li, Xiaopei; Bi, Quan; Liu, Shaoxuan; Chen, Jing; Yue, Shijuan

收藏 | 浏览/下载：26/0 | 提交时间：2015/05/05

Two-dimensional asynchronous spectroscopy Intermolecular interaction Reference spectrum Sensitivity Signal-to-noise ratio

Design and demonstration of micro multi-step mirrors and light source in micro FTIR (EI CONFERENCE) 会议论文 OAI收割
6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011, February 20, 2011 - February 23, 2011, Kaohsiung, Taiwan
Liang Z.; Fu J.; Feng C.; Liang J.

收藏 | 浏览/下载：48/0 | 提交时间：2013/03/25

To obtain high resolution high signal-to-noise ratio (SNR) high reliability and real time in wide spectral range we study the space modulation Micro Fourier Transform Spectrometer (FTS) based on multi-step mirrors covering the spectral range of 3-5m and 8-12 m in theory and experiment. The influences of spectrum reconstruction caused by the diffraction and extended light source in Fourier Transform Infrared Spectrometer (FTIR) are analyzed. A method to reduce the noises in spectrum reconstruction and the relationship between coherent intensity and solid angle of light source are discussed. An extended light source with suitable size is chosen considering the requirement of SNR and spectrum resolving power in the optical design. Furthermore the fabrication of micro multi-step mirrors which is the core part of FTS is investigated. Three methods for fabricating multi-step micro mirrors are demonstrated. 2011 IEEE.

Micro assembled fourier transform spectrometer (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Liang J.-Q.; Zhang J.; Zhang J.; Zhang J.; Wang B.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

With the trend of minimization of Fourier transform spectrometer (FTS) which is particularly pronounced in many applications a model of a micro FTS with no moving parts is proposed and analyzed. During analyzng the gradients which mainly introduce phase error are accounted. Based on these assumptions and the improved Mertz phase correcting method the spectrum of signal is simulated with real extended light source. The resolution can be up to 3.43nm@800nm with high signal-to-noise ratio (SNR) limiting resolving ability 6.8dB. In addition the fabrication method of components are illuminated and demonstrated which can not only make it bear some advantages over conventional micro dispersive spectrometers but also afford some new concepts on the design of spectrometers with improved performance. 2009 SPIE.

A sensitive solid-phase time-resolved fluorescence immunoassay apparatus (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者: Song K.-F.; Li J.-L.; Zhang W.-L.; Wang Y.-L.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

In the device a He-Ne laser of flash frequency 1-20 Hz was adopted as exciting light source and three key technical problems have been solved successfully in order to enhance the detecting sensitivity and measuring stability of the device for time-resolved fluorimmunoassays(TRFIA) [1]. The first one is to design optimum exciting optical system so that the exciting light beam excite the sample most effectively. The second one is to have a project spectrum filter which can reduce the affection of the background light to the photomultiplier tube and also ensure influence of the stray light and mixed diffusion light to the sample fluorescence to the least the sample fluorescence through the integrating sphere and come to the grating monochromator The right wavelength will be chosed through changing the angle of incidence of the grating monochromator. The third one is to simulate the principle of sample averaging of BOXCAR averager. In the device SCM was used as primary controller and CPLD was used as timing controller. Through the preparation process signal-to-noise ratio(SNR) will be improved also adjust delay time ampling frequency and sampling number arbitrarily. By testing the sensitivity is 10-12mol/L(substance marked by Eu3+) examination repeat is &le2.5% examination linearity is from 10 -8mol/L to 10-12mol/L correlation coefficient is 99.98%(p&le0.01). The instrument is advanced for ultrasensitive detection of antigen and antibody and solve the tumor genetic variation the virus protein detection. 2009 SPIE.

The calibration of faint simulation star magnitude based on single photon count technique (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China
作者: Xu S.-Y.; Guo J.; Guo J.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

A calibration method of faint star magnitude of the star scene simulation device is proposed in this paper. In the research of simulation star magnitude luminometers and CCD devices are the general calibration devices which are used to measure the illumination intensity and calibrate its magnitude. But if the simulation magnitude is only sixth magnitude its illumination intensity is only 1.010-8 Lux. This illumination intensity level is the lowest illumination intensity that the commercial luminometer can detect. Hence the simulation star magnitude lower than six magnitude cannot be calibrated by luminoters. Likewise CCD devices also need an additive cooler in this case. When the single photon characteristic is presented due to the low luminosity of simulating light sources the simulation star magnitude can be calibrated by detecting its photon flux of radiation with the method of single photon count. In this paper the detection principle of single photon based on a compact designed PMT detecting of the radiation level of simulation star magnitude is advanced. Especially a spectrum match method is proved theoretically to be an effective means for selecting PMT photosensitive type. In the case of the detection object of the simulation star in visible wavelength a analysis indicates that the material of tri-alkali cathode materials its best choice after being compared the Signal-to-Noise of photon detector of several PMT photosensitive materials based on the different spectrum match ratio of different object light sources and different cathode materials. An experiment is employed to show the relationship of control voltage of PMT and its dark counter the relationship of the environment temperature of PMT and its dark counter which proves its only decades of CPS at room temperature. The so low dark counter avoids a bulky cooler and is convenient for installing it on the star scene simulation equipment. Finally in the experiment of calibrating the simulation star magnitudes the ability of its calibration is confirmed to reaches up to 12m meanwhile its calibration error is within 0.2m. 2009 SPIE.

Optimization of signal-to-noise ratio of laser heterodyne radiometer 期刊论文 OAI收割
Microwave and Optical Technology Letters
作者: Sun, Chunyan; He, Xinyu; Xu, Ruoyu; Lu, Sifan; Pan, Xueping

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收藏 | 浏览/下载：9/0 | 提交时间：2023/10/10

CO2 gas high‐resolution spectrum laser heterodyne radiometer optimization signal‐to‐noise ratio