中国科学院机构知识库网格系统: 检索

A power and data decoupled transmission method for wireless power transfer systems via a shared inductive link 期刊论文 OAI收割
Energies, 2018, 卷号: 11, 期号: 8, 页码: 1-14
作者: Dai X(戴欣); Li, Xiaofei; Wang, Haichao

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收藏 | 浏览/下载：64/0 | 提交时间：2018/09/30

Wireless Power Transfer Data Transmission Hysteresis Control Signal To Noise Ratio (Snr)

System Signal-to-Noise Ratio Analysis of Hyperspectral Imaging Chain Model Based on Electron Multiplication 期刊论文 OAI收割
Guangxue Xuebao/Acta Optica Sinica, 2018, 卷号: 38, 期号: 11
作者: Yu, Da; Liu, Jinguo; He, Xin; He, Jiawei; Chen, Jiayu

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收藏 | 浏览/下载：22/0 | 提交时间：2019/09/17

Signal to noise ratio Atmospheric radiation Charge coupled devices Detectors Electrons Hyperspectral imaging Light transmission Optical systems Reflection Spectroscopic analysis Spectroscopy

An investigation of the aerodynamic noise of long-grouped high speed trains 会议论文 OAI收割
Cagliari, Sardinia, Italy , 5-8 April 2016
作者: Sun ZX(孙振旭); Yang GW(杨国伟); Guo DL(郭迪龙)

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收藏 | 浏览/下载：32/0 | 提交时间：2018/11/08

Acoustic noise Acoustic variables measurement Acoustic wave transmission Aerodynamics Architectural acoustics Computational aeroacoustics Numerical models Railroad transportation Railroads Speed Turbulence Vehicles Aerodynamic noise High speed train (HST) Non linear acoustics Sound power Sound pressure level

开放式数字印刷控制系统中的关键技术研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2014
作者: 胡建华

收藏 | 浏览/下载：74/0 | 提交时间：2015/09/02

开放式大幅面多通道数字印刷控制系统阈值噪声调制误差扩散高实时性数字印刷传输协议 Large format multi-channel open digital printing control system Threshold noise modulation Error diffusion High real-time performance digital printing transmission protocol

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：54/0 | 提交时间：2015/07/06

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

Design of high speed and parallel compression system used in the big area CCD of high frame frequency (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Precision Engineering and Non-Traditional Machining, PENTM 2011, December 9, 2011 - December 11, 2011, Xi'an, China
作者: Li G.-N.; Jin L.-X.; Zhang R.-F.; Wang W.-H.; Li G.-N.

收藏 | 浏览/下载：53/0 | 提交时间：2013/03/25

According to the area CCD camera of characteristics such as high resolution capacity and high frame frequency this paper puts forward a high speed and parallel image compression system of high integration degree. Firstly according to the work principle of the area CCD FPGA is adopted to realize the timing driving and multichannel and parallel analog signal handling to raise the export frame frequency of the area CCD. Secondly with an image compression scheme based on FPGA embedded processor MicroBlaze and ADV212 compression chip real time image compression and the high speed area CCD are realized. Finally by detecting the analog signal of the area CCD output the real time compression of the big area CCD image is carried out in different compression ratios and the compression performance is analyzed. Experiment result shows that this scheme can realize real time image compression with the biggest data rate of 520Mbps. When compression bit ratio is 0.15 the signal-to-noise ratio of peak value can reach 36 dB. Image collection and image compression are integrated which reduces the data transmission between them and improves systematic integration degree.

Stochastic Nature in Cellular Processes 期刊论文 OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2011, 卷号: 56, 页码: 913-921
作者: Liu Bo; Liu Sheng-Jun; Wang Qi; Yan Shi-Wei; Geng Yi-Zhao

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收藏 | 浏览/下载：24/0 | 提交时间：2018/07/16

stochasticity noise correlation gene expression noise transmission

Stochastic Nature in Cellular Processes 期刊论文 OAI收割
Communications in Theoretical Physics, 2011, 期号: 11, 页码: 913-921
作者: Liu B(刘波); Liu SJ(刘圣君); Wang Q(王祺); Yan SW(晏世伟); Geng YZ(耿轶钊)

收藏 | 浏览/下载：30/0 | 提交时间：2015/12/25

stochasticity noise correlation gene expression noise transmission

Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang J.; Zhang J.; Zhang J.; Shi G.; Zhang X.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus which means the system MTF is quite insensitive to defocus and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.

The design of high-speed optical fiber communication system based on PCI bus (EI CONFERENCE) 会议论文 OAI收割
2010 2nd IEEE International Conference on Advanced Management Science, ICAMS 2010, July 9, 2010 - July 11, 2010, Chengdu, China
作者: Zhang L.-G.; Zhang L.-G.; He X.

收藏 | 浏览/下载：57/0 | 提交时间：2013/03/25

In order to increase the transmission distance and reduce noise effectively a communication system with the optical fiber interface is developed in this paper. In the system the PCI bus is adopted as the connection bus between the underlying optical fiber transceiver module circuitry and host computer using the WDM driver. The FPGA is the core logic of the whole system responsible for data transmission and timing logic control. The module structure and the design method of the PCI bus the principle and the design of optical interface module and the bottom-driven development are described in this paper. The experiment results show that the system has basically meet requirement targets. It can achieve the maximum transfer rate of 40MBps when running in the DMA mode. With long transmission distance strong antiinterference and high scalability this system has stable and reliable performance. 2010 IEEE.