周期图

With this method,carrier Doppler was firstly estimated with Periodogram Spectral Analysis method;then LOS Doppler velocity was calculated;and finally,the velocity of the receiver was compu...

首先应用周期图法估计片段GPS信号的多普勒频移，计算视距变化率，然后建立视距变化率方程，进而求得接收机的速度。通过Matlab模拟的信号和GPS仿真器模拟产生的高动态信号仿真验证了多普勒频移的估计精度和用户速度的测量精度。

The optimal control problem for the FCC process is solved using the MFNN (multilayer feedforward neural network) for system recognition and modeling, periodogram analysis for model testing, and the advanced Frank-Wolfe algorithm for steady state optimization computation.

为解决催化裂化过程的优化控制问题，采用多层前馈神经网络进行辨识、建模，用周期图检验法对模型检验，用改进的Frank-Wolfe算法进行稳态优化计算，并以大港炼油厂实际生产过程的稳态数据进行试验和验证，说明神经网络适合于解决非线性复杂生产过程的辨识、建模和稳态优化控制问题。

Clinical application of the Spontaneous Otoacoustic Emissions might be enhanced by the method of improved periodogram and Wavelet transform.

改进的周期图法和小波变换方法对推动自发耳声发射在临床生理和病理上的应用有巨大的潜力。

Result It was found that improved periodogram and Wavelet transform performed better than the method currently used in clinics.

结果 改进的周期图法和小波变换方法比目前临床所采用的检测算法在准确检测谱峰峰值及其位置、高分辨率提取信号频谱特征等方面，具有更大的优越性。

Improved periodogram,AR model and Wavelet transform techniques were used to detect the Spontaneous otoacoustic emissions signal.

采用改进的周期图法、AR模型及小波变换方法，研究手术自发耳声发射信号的颈椎病检测算法。

Three new methods are provided, which are demodulation by means of envelop periodogram, multi-path signal and vector signal.

提出了包络周期图法、利用多途信号方法和利用矢量信号方法。

Furthermore, we study the periodogram predictor and controller seriously ,using experimental data to predict and control the shipping motion.

然后，用周期图预报及控制的方法对此问题进行了详细研究，并用实测数据进行预报计算。

When the power of phase polynomial is one or two respectively, periodogram and chirp Fourier transform method are the corresponding optimal detection methods.

在相位多项式次数分别为1或2时，周期图、chirp傅里叶变换检测即为对应的最优检测器。

As we know the correct estimation of power spectrum is the precondition for the reappearance of power spectrum, so the typical method of estimation – Periodogram, is taken into consideration.

功率谱再现的前提是对功率谱做出正确的估计，因此本文首先对功率谱估计的经典法——周期图法进行了研究，并根据实验结果指出其在进行功率谱估计时的不足之处。

In order to understand deeply variable characteristics of IMSR, the authors mainly use Scargle periodogram and wavelet transform to study periodicity of ISMR during 1871-2004 in present paper.

为了深入认识ISMR的变化特征，主要利用Scargle周期图和小波变换研究了1871-2004年间ISMR变化的周期性。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。