查询词典 interval estimation

It gives performance comparison of instantaneous frequency estimation algorithms based on the peak of Wigner-Ville distribution and fourth-order polynomial Wiger-Ville distribution, analyzes the influence of window width to the estimation performance of instantaneous frequency estimation algorithms based on time-frequency distribution.

在不同飞行状态下，给出了基于Wigner-Ville分布、四阶多项式Wigner-Ville分布峰值的瞬时频率估计算法的性能对比，并分析了窗长对瞬时频率估计性能的影响。

Two kinds of typical wavelet, namely Morlet wavelet and Chirplet wavelet are analyzed. The methods of designing optimal sonar signals for detection and time-delay estimation, for Doppler stretch estimation, and for simultaneous estimation of time delay and scale, are investigated respectively.

对Morlet小波、高斯Chirplet小波进行了波形分析；研究了最佳检测和时延估计波形、最佳多普勒估计波形、最优时延和尺度联合估计波形的设计方法；探讨了宽带信号波形设计的统一框架问题。

It compares two different estimation methods,"two step subsample bootstrap" based on moment estimation and Maximum Likelihood Estimation, according to their theoretical basis and computation procedures.

讨论了根据极值理论计算受险价值的两类不同的方法：基于矩估计的"两次子样试算法"和极大似然估计法，并给出了各自理论推导过程和计算步骤。

It compares two different estimation methods," two step subsample bootstrap" based on moment estimation and Maximum L ikelihood Estimation , according to their theoretical basis and computation procedures.

讨论了根据极值理论计算受险价值的两类不同的方法：基于矩估计的"两次子样试算法"和极大似然估计法，并给出了各自理论推导过程和计算步骤。

A necessary and sufficient condition for the unbiasedness of Balanced LS Estimation is gained, and for the given L, t can be chosen to make the MSEM of the Balanced LS Estimation less than that of OLS Estimation.

给出了平衡LS估计为无偏估计的充分必要条件，对于给定的L，适当地选择参数t可使平衡LS估计的均方误差矩阵小于OLS估计的均方误差矩阵。

The ambiguity of DOA estimation due to ignorance of the function form of angular signal distribution is analyzed and the DOA estimation without ambiguity is given. 4. A method of DOA estimation of distributed sources is proposed by using the knowledge of the unimodal property of angular signal distribution and independence between different distributed sources.

利用角信号分布函数的共轭对称性，提出了基于噪声子空间的极小最小特征值一维搜索分布式目标DOA估计方法，和基于信号子空间的极大最大特征值一维搜索分布式目标DOA估计方法。

Normal vectors, Gaussian and mean curvatures estimation are obtained by different curvatures estimation methods, and the error is computed by comparing estimation results with real ones on the sphere of unit radius and toms.

在单位球面和环面上，利用不同的曲率估计方法得到法向量以及高斯曲率，平均曲率的估算值，再将估算值与实际值做比较求误差。

In addition, error resource existing in rotor position estimation algorithm is analyzed comprehensibly, therefore, some further work is made to eliminate the negative influence from errors. In this research, additional function is added to rotor position estimation algorithm to enhance precision of position estimation and its feasibility has been proved.

根据已有的无位置传感器转子位置检测原理，提出了两种改进的检测方法：一是改进电感法的检测方法，并设计了检测电路；二是根据SR电机的ψ-I-θ关系，研究了基于模糊推理规则的间接转子位置估算方法，分析了估算过程中存在的误差源，研究了提高估算精度的策略。

Thirdly, the maximum-likelihood CFO estimation algorithms based on null-subcarrier are investigated, and it is shown that the maximum-likelihood CFO estimation algorithm based on equispaced null-subcarriers is equivalent to the CFO estimation algorithm utilizing the correlation of repeated training sequences.

进一步分析了在频率选择性衰落信道下，空载波和信道零点的数目与位置对基于空子载波的载波频偏估计算法可辨识性的影响。

Thirdly, the maximum-likelihood CFO estimation algorithms based on null-subcarrier are investigated, and it is shown that the maximum-likelihood CFO estimation algorithm based on equispaced null-subcarriers is equivalent to the CFO estimation algorithm utilizing the correlation of repeated training sequences.

提出了两种基于时域相关峰值检测的同步估计改进算法：1）采用一个OFDM符号做为训练序列，在接收端进行差分相关以解决时间度量函数中出现的平台效应。

Core, self psychology is psychoanalytic, but there are crucial differences in how the patient-therapist relationship is viewed.

自体心理学的核心是精神分析，但在如何看待患者-治疗师关系方面，自体心理学和精神分析有着根本性的不同。

High-performance cars brake drum production costs increase less than 10%.

高性能汽车刹车鼓的生产成本增加小于10％。