参数估计

In the case of polyphonic music signals, the estimation of the parameters of sinusoids is a difficult task, since the periodic components are usually not stable. A sufficient time and frequency resolution is also difficult to achieve at the same time.

因为周期分量通常不稳定，在多重的语音信号中，估计正弦模型的参数是一项十分困难的任务，同时也很难达到较高的时间和频率分辨率。

Simulation results illuminate that the estimation precisions of EKF and STF are affected by the changes of parameters.

仿真研究表明，电机参数变化对EKF和STF的估计精度均会产生不良影响。

Further, based on the method of pre-elimination of parameters, the formulae of the partly-weigthed least squares estimation with constraints on parts of the parameters are derived to include a prior information.

在顾及电离层加权模型的情况下，利用参数消去法，推导了加权最小二乘法估计模糊度实数解的公式。

First, the least square method is used to pre-estimate these parameters, and then modified one-dimensional Whittaker graduation is applied to obtain the graduation parameters.

即先用最小二乘法对各个群体死力函数的参数进行粗估计，再利用一维Whittaker修匀。

The channel estimation is formed by projecting a give user's spreading waveform into the estimated noise subspace and nulling the projection.

利用信号向量在噪声子空间的投影为零的性质，可以估计出信道的参数。

First the unknown signals were separated by joint approximate diagonalisation of eigen-matrices algorithm. Then the method used the smoothed pseudo Wigner-Ville distribution of each separated FH signal to estimate its transmission parameters such as hop duration, time-offset and hopping frequency pattern.

首先采用特征矩阵联合近似最优化算法分离跳频信号，再利用多窗口重叠的平滑伪Wigner-Ville分布来估计出跳频信号的跳周期、定时偏差和跳频频率等参数。

Secondly, estimating long memory stochastic volatility model using the frequency domain quasi maximum likelihood estimation and chaos optimization algorithm, which can improve the efficiency.

使用频域内拟极大似然方法估计LMSV模型参数，为了提高计算效率应用混沌优化算法进行最优搜索。

Then EM algorithm is used to re-estimate the HMM parameters.

然后利用EM算法对参数重新进行估计，得到隐马尔可夫模型的状态图。

Build a good crop growth and development model, not only can predict the crop in different environmental conditions, most need to re-estimate the model parameters and optimization.

构建良好的作物生长发育模型，不但可以预测作物在不同的环境条件下模型参数大多需要重新估计和优化。

In order to better analyze the change of China economy under CAFTA, author separated Asean from other countries in the world. Author makes up the SAM of China 2000, re-estimate the parameter of produce equation, consumed equation, and substitute flexibility etc. By mean of analyzing its policy significance, author put forward to some proposals at last.

重新编制 2000年我国社会经济核算矩阵表，估计了三部门的生产函数、居民消费函数、进出口替代弹性等参数，重点模拟这种贸易合作安排对我国未来经济发展可能产生变化的影响，通过分析其中的经济含义，最后提出相应的对策建议。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。