排序方式: 共有38条查询结果,搜索用时 15 毫秒
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采用边缘探测技术的海表温度测量精度及误差分析 总被引:2,自引:0,他引:2
采用边缘探测技术测量布里渊频移量的误差会对海表温度测量精度带来很大影响.文章根据布里渊频移量与海表温度之间的关系以及边缘探测技术的测量原理,建立了边缘探测技术中布里渊频移量的测量误差与海表温度精度的理论模型,分析了边缘探测技术对海表温度测量精度的影响.仿真结果表明,在布里渊频移量为7.2~7.9GHz的范围内,布里渊频移量的最大测量误差约为0.33 MHz,根据布里渊频移量反演的海表温度测量精度为0.0105℃.该研究对海表温度的监测系统设计有着很好的指导意义. 相似文献
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The backscattering signal, which arises from the pulsed laser traveling through water, has limited the lidar system sensitivity and underwater target contrast. The transmitted optical carrier is modulated to be ultrashort pulsed laser and it is effective to suppress the backscattering to adopt the coherent detection technology by identifying the modulation envelope. A nonstationary light field is formed in seawater by the ultrashort pulsed laser. The inherent relationship between the nonstationary light field formed by modulated lidar and the stationary light field formed by conventional lidar was discussed and the backscattering light model of the stationary light field for the ultrashort pulsed laser was proposed. The backscattering signal in modulated lidar system was processed and analyzed in the frequency domain on the basis of the model. 相似文献
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分析无功补偿装置中并联电容器对系统谐波电流放大的影响,提出有源电力滤波器与无功补偿装置并联使用时采样点(有源电力滤波器电流互感器CT的安装位置)的选取方法,并以某机场助航灯光站谐波治理项目为例进行说明。 相似文献
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