搜索结果: 1-15 共查到“Jitter”相关记录18条 . 查询时间(0.086 秒)
FAST望远镜首次发现毫秒脉冲星的jitter模式（图）
FAST 望远镜 毫秒脉冲星 jitter模式
2021/3/3
利用脉冲星计时阵探测纳赫兹引力波是目前天文学领域的热点前沿，理解其中的计时噪声并且提高计时精度会极大提高探测纳赫兹引力波的能力。近日，中国科学院国家天文台博士研究生冯毅及其导师李菂研究员和来自澳大利亚联邦科学与工业研究组织的George Hobbs博士领导的团队，利用FAST发现了脉冲星计时阵中的毫秒脉冲星J1022+1001的jitter噪声(计时噪声的一种)模式，是利用FAST更好理解毫秒脉冲...
Jitter Estimation with High Accuracy for Oscillator-Based TRNGs
TRNG ring oscillator jitter
2018/11/6
Ring oscillator-based true random number generators (RO-based TRNGs) are widely used to provide unpredictable random numbers for cryptographic systems. The unpredictability of the output numbers, whic...
A NOVEL TECHNIQUE FOR PRECISION GEOMETRIC CORRECTION OF JITTER DISTORTION FOR THE EUROPA IMAGING SYSTEM AND OTHER ROLLING-SHUTTER CAMERAS
Europa photogrammetry jitter geometric correction active-pixel sensors
2018/5/14
We use simulated images to demonstrate a novel technique for mitigating geometric distortions caused by platform motion (“jitter”) as two-dimensional image sensors are exposed and read out line by lin...
Convolutional Neural Networks with Data Augmentation against Jitter-Based Countermeasures -- Profiling Attacks without Pre-Processing --
side channel attacks machine learning deep learning
2017/8/10
In the context of the security evaluation of cryptographic implementations, profiling attacks (aka Template Attacks) play a fundamental role. Nowadays the most popular Template Attack strategy consist...
IMPROVEMENT OF DEM GENERATION FROM ASTER IMAGES USING SATELLITE JITTER ESTIMATION AND OPEN SOURCE IMPLEMENTATION
ASTER Jitter Orbit Attitude correction DEM generation RPC
2016/1/15
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) system embarked on the Terra (EOS AM-1) satellite has been a source of stereoscopic images covering the whole globe at a 15m ...
Property and Removal of Jitter in Beijing-1 Small Satellite Panchromatic Images
Beijing-1 Small Satellite Panchromatic Image Jitter Removal Jitter Property
2015/11/23
Attitude of the Small satellite is prone to be affected by external disturbing factors due to its small inertia. As for Beijing-1 small satellite, jitter is induced and exhibited in the images taken w...
Analysis and synthesis of state-feedback controllers with timing jitter
Constant linear linear system status the convex quadratic performance the linear matrix inequality (lmi) and lyapunov function
2015/8/10
We consider a continuous-time linear system with sampled constant linear state-feedback control and a convex quadratic performance measure. The sample times, however, are subject to variation within s...
Analysis and Synthesis of State-Feedback Controllers with Timing Jitter
Analysis and Synthesis State-Feedback Controllers Timing Jitter
2015/7/9
We consider a continuous-time linear system with sampled constant linear state-feedback control and a convex quadratic performance measure. The sample times, however, are subject to variation within s...
为了更好地对于TMT三镜镜面jitter进行评价,基于镜面方向的加速度信号,通过传递函数以及功率谱的方法,获得了镜面jitter的频域分布与数值特征。首先,对于梯形积分、辛普森积分以及3/8辛普森积分的基本性质进行推导,之后基于功率谱的思想,提出利用白噪声填满数据全部频域以及结合数值方法得到传递函数;最后对于实际测量得到的加速度信号,得到了米级口径望远镜镜面jitter的数值以及频域分布,同时证明...
由于采集条件的限制及后续处理中废炮废道的剔除,使得地震数据成为不完整数据体,这将影响后续地震资料的处理及反演,因此有必要进行地震数据重建。本文结合曲波变换和凸集投影(POCS)方法对不规则地震数据进行重建:对比分析不同阈值模型对二维地震数据重建结果及收敛速度的影响,采用改进的指数阈值模型(q=0.5)和改进的Jitter欠采样方法在频率域对每一有效频率切片进行二维重建,最终实现三维地震数据重建,并...
传统的地震勘探数据采样必须遵循奈奎斯特采样定理,而野外数据采样可能由于地震道缺失或者勘探成本限制,不一定满足采样定理要求,因此存在数据重建问题.本文基于压缩感知理论,利用随机欠采样方法将传统规则欠采样所带来的互相干假频转化成较低幅度的不相干噪声,从而将数据重建问题转为更简单的去噪问题.在数据重建过程中引入凸集投影算法(POCS),提出采用e-√x(0≤x≤1)衰减规律的阈值参数,构建基于曲波变换三...
Time series analysis of jitter in sustain vowels
jitter time domain features distribution
2012/12/14
his paper proposes a new equation to show the time domain features of jitter: Jitter = (Ti+1-Ti)/Ti. The subjects are tonal language speakers. Jitter is extracted from EGG signals....
Timing jitter optimization of mode-locked Yb-fiber lasers toward the attosecond regime
Fluctuations relaxations and noise Ultrafast lasers
2011/8/29
We demonstrate ultra-low timing jitter optical pulse trains from freerunning,80 MHz repetition rate, mode-locked Yb-fiber lasers. Timing jitter of various mode-locking conditions at close-to-zero intr...
Phase Noise and Timing Jitter Eliminator for Mode-locked Lasers Based on External Graphene Layers
Mode-locked lasers Nanomaterials
2015/5/21
We demonstrate a noise eliminator with a reduction of 34% for phase noise and timing jitter based on external graphene layers for mode-locked lasers by absorbing the low-power background noise from th...
Fast Experimental BER Extraction of 40 Gb/s Optical Signal Impacted by Jitter, ISI and ASE Noise Using Waveform Sampler
Optical Signal Impacted Jitter ISI ASE Waveform Sampler
2015/8/4
We present a new experimental BER extraction method using a sampling oscilloscope and statistical processing on EDFA noise, photoreceiver noise, jitter and ISI successfully tested on a 40 Gb/s network...