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针对动态Allan方差运用固定长度的分析窗截取信号导致样本数据量减少,长相关时间下方差估计值置信度降低,首先,针对动态信号跟踪能力与置信度的提高不能兼顾的问题提出了一种改进算法。引入截断窗内峭度值作为表征信号短时稳定度的参数,并建立以峭度为变量的窗宽函数,该函数可以使截断窗长随着信号的平稳程度自动变化。其次,再用窗宽自适应的滑动窗分段截取陀螺随机误差,分别对每个截断窗内样本进行总方差计算以增加方差...
PRELIMINARY RESEARCH ON RADIANCE FOG DETECTION BASED ON TIME SERIES MTSAT DATA
Radiance fog MTSAT time series
2015/5/6
Fog is a kind of disastrous weather phenomenon. In this paper, the geostationary satellite MTSAT imagery is selected as the main data source to radiance fog detection. According to the unique featur...
Measurements of Fog Water Deposition on the California Central Coast
Fog Deposition California Styling Water Budget
2013/2/27
Fog deposition is a notable component of the water budget of herbaceous-shrub ecosystems on the central and southern coastal regions of California. This paper presents an analysis of fog water deposit...
Experimental Study of the Effects of Environmental and Fog Condensation Nuclei Parameters on the Rate of Fog Formation and Dissipation Using a New Laboratory Scale Fog Generation Facility
Fog Condensation Visibility Hygroscopic Droplet growth
2016/3/28
The IIT Kanpur Fog Chamber Facility has been conceptualized and built indigenously to study the fog formation and
dissipation under various environmental conditions. The chamber has been designed suc...
FOG SINS/GPS组合导航系统不同步时间的鉴定方法。
On the Relation between Atmospheric Visibility and the Drop Size Distribution of Fog for FSO Link Planning
Atmospheric Visibility Drop Size Distribution FSO Link Planning
2015/7/17
Based on the Mie scattering theory and estimated drop size distribution, dependence between atmospheric visibility, microphysical parameters of fog and specific attenuation is studied. The measured an...
CFD Modeling to Improve the Design of a Fog System for Cooling Greenhouses
fog-cooling system glasshouse natural ventilation wind speed
2009/6/10
A CFD model was developed to simulate the air temperature and relative humidity distribution in greenhouses adopting fog-cooling systems using FLUENT. The developed model was validated using the data ...
LMS自适应滤波算法在FOG数据处理中的应用
数据处理 滤波 光纤陀螺 变步长最小均方算法
2013/8/3
针对光纤陀螺(fiber optic gyroscope, FOG)输出数据的随机噪声问题,提出将变步长最小均方(least mean square, LMS) 自适应滤波算法应用于FOG数据处理中。根据FOG数据特点,构造变步长LMS 自适应滤波器,对FOG输出数据进行实时预处理,自动地调节参数,达到降低FOG随机漂移及角度随机游走的目的。采用Allan方差对滤波前后的FOG数据进行分析,结果表...