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- high spectral density carrier 高频谱密度载波
- The method using HHT to estimate local spectral density is proposed. 本文给出了利用HHT估计地震地面运动局部谱密度的方法。
- A random signal of known statistical properties of amplitude, distribution, and spectral density. 振幅、分布及谱密度等的已知统计特性的随机信号。
- It provides a lot of accurate formulae for spectral density transforming into Allan variance. 本文推导了有限频域[f_a,f_b]中的噪声引起的修正的Allan方差公式,为噪声的谱密度变换成Allan方差提供了准确的公式。
- We analyse statistics properties of ground clutters and study AR model of correlated clutters power spectral density. 分析了地杂波统计特性,研究了相关雷达杂波功率谱特性的AR模型及其模拟方法。
- Spatial heterodyne spectroscopy(SHS) is a new spectroscopic technique which can obtain high spectral resolution. 空间外差光谱技术是一种新型的可实现超光谱分辨的光谱分析技术。
- The paper analyses the signal processing with emphasis on Signal to Noise Ratio (SNR) in output of correlator and SNR in signal power spectral density. 并对算法处理中相关器输出中的信噪比(SNR)和功率谱密度中的SNR进行了重点分析。
- V-BLAST has demonstrated very high spectral efficiency, and can improve system capacity dramatically. BLAST系统有着非常高的频谱利用率,可以显著地提高系统容量。
- With the power spectral density, the vibration mechanism and the vibration transfer process of viaduct caused by the traffic load were introduced. 摘要从功率谱的角度介绍城市高架桥梁在交通荷载下产生振动的机理和振动的传递过程。
- The power spectral density of gearbox vibration signals is estimated by the periodogram from which original feature sets are derived. 为了使诊断结果更好地可视化,利用遗传编程结果的固有随机性,提取两个新特征指标。
- In practical application,one of the difficulties is the adjustment of the power spectral density function to various soil conditions. 在实际应用中,调整功率谱密度函数以适应各类场地土仍是一项困难的工作。
- T. Ono, “Wavelength Division Multiplexing Terabit Technologies with High Spectral Efficiency,” Optics &Photonics News, pp.56-59, Mar, 2001. 赖柏洲,光纤通信与网路技术,台北:全华科技股份有限公司,2003,第2-11-2-17页。
- Therefore, experience is needed to made good analysis.We dealt with the colonic pressure data by analyzing its power spectral density(PSD).The PSD is com... 本文对实际采集的结肠压力信号进行功率谱密度分析,并与结肠的基本功能相对照。
- This paper presents a IJF coding method based on filter shaping, and deduces IJF power spectral density adopting this method.Finally this paper simply introduce FQPSK modulation. 本文介绍基于滤波器成形法的IJF编码,并推导基于该法的IJF功率谱密度,在此基础上简要介绍了FQPSK调制体制。
- For its high spectral and time resolution, MODIS data was more suitable for the inversion of snow depth compared to NOAA and other remotely sensed data. 应用中分辨率成像光谱仪(MODIS)数据进行雪深遥感反演理论和方法的研究。
- The focusing spectrometer based on the ECS provides high spectral resolution and spatial resolution as well as high luminosity(high collection efficiency). 椭圆弯曲晶体谱仪除有高的收集光子效率外,还有更好的谱分辨和空间分辨率。
- LSFRV is a stochastic process obeying Gaussian distribution whose standard deviation can be gotten by the longitudinal vibration pavement spectral density of running vehicles and the longitudinal vibration model of running vehicles. 行车纵剪力是服从正态分布的随机过程,标准方差可以通过行车纵振路面谱和车辆纵振模型得到;
- The study shows that enhancing the transmission rate of the NB system, as well as the power spectral density (PSD) of the UWB signal in the bandwidth of the NB system, will result in the higher BER of the NB system. 研究表明,提高NB系统的传输速率或增大UWB信号在NB系统的工作频带内的功率谱密度会减小NB系统的信噪比,增大NB系统的误码率。
- To adequately take advantage of the high spectral resolution of multispectral images and the high spatial resolution of panchromatic images, multisensor data fusion technique has been proposed in remote sensing image processing. 为了更充分地发挥这两类遥感图像数据的价值,人们利用两类数据的互补性,将多传感器融合技术引进了遥感图像处理领域。
- Wind tunnel model tests were conducted to investigate the power spectral density (PSD) and the coherence of the wind load on the CAARC standard tall building model in exposure categories B and D. 结果显示:不同高度的无因次风荷载功率谱密度具有较好的一致性;在顺风向,不同高度风荷载间的相干特性显示出指数式的衰减规律;在横风向,风荷载在漩涡脱落频率附近有很强的相关性,相干函数值接近于1。