参数的估计

• Disaggregate methods are utilized in this paper to formulate the departure time and transportation mode double class nested logic models , and then the arithmetic of the model is analyzed
  利用非集计方法，构造了旅客出发时刻和运输方式选择行为的双层巢式逻辑决策模型，并对模型参数的估计方法进行分析。
• This paper is concerned with parametric component and nonparametric component estimators in a semiparametric regression model . this model is more flexible and explantory than traditional linear or nonparametric model
  本篇论文主要讨论关于半参数回归模型的参数和非参数的估计问题，半参数回归模型是近十几年发展起来的一种统计模型。
• A wavelet domain hidden markov tree ( hmt ) model is constructed to model statistical dependence and nongaussian statistics of wavelet coefficient . the estimate of hmt model parameters can be obtained by em algorithm
  该方法通过小波域的隐markov树（ hmt ）模型来描述小波系数的统计相关性和非高斯性，利用em算法获得hmt模型参数的估计。
• The simulation results show that the proposed method is effective and recommendable . for image sequence estimating motion parameters , the information can be used to the extent . therefore , the estimation results are more accurate
  由于采用序列图像来估计运动参数，可以更充分的利用信息，所以对目标空间位置和运动参数的估计也较准确。
• In the patent document , a training sequence is designed to estimate the parameters in pcma . but in this article will do some researcher in the parameters estimate without training . because of the lack of references , the estimate works are very hard
  在pcma中,参数估计很重要,专利中为了快速得到各个参数的估计值,是通过两个发送终端轮流抑制自信号,让对方发送训练序列来对各个参数进行估计的。
• Study the broad sense description and the estimation of the equation parameter of p - s - n curve . study the estimation method of the reliability range of the materials fatigue life under given reliability correspond to different stress level
  并利用数理统计理论，探讨p - s - n曲线的广义描述方法， p - s - n曲线方程参数的估计方法，以及对应不同应力水平下的材料疲劳寿命在给定置信度下的置信区间估计方法。
• The computer simulations show the validity of the models . 3 . joint estimation of the time delay and doppler frequency based on short - time fourier transform ( stft ) and time - frequency analysis are studied to estimate the parameters of the underwater target echo
  针对主动回波信号参量的估计问题，重点研究了利用短时傅立叶变换、时频分析进行时延和多普勒频移联合估计，进而进行目标距离和速度参数的估计。
• Then multipath doa ' s and amplitudes can be estimated by using multipath delays . besides , wmsa and delay tracing techniques are used to improve the precision of parameter estimation and the performance of the whole system is improved in some degree accordingly
  此外，我们还使用了wmsa （ weightedmulti - slotaveraging ） 、时延跟踪等技术来提高多径参数的估计精度，从而使整个系统的性能得到一定程度的改善。
• At first , to estimating common parameters , in this dissertation three detection methods - square detection , spectrum correlation detection and cepstrum detection are applied to detect the ds / cdma signal . these three methods have different advantages and disadvantages respectively
  为解决ds / cdma信号共性参数的估计,本文首先将三种检测方法:平方律法、周期谱法和倒谱法,应用到ds / cdma信号的检测与参数估计中。
• One is initial parameter estimation , another is small rotation around the center of images . for the former problem , we use resampled small images to compute cross correlation . and we use a 3 - parameter model including small rotation to solve the latter problem
  主要解决了初始参数的估计问题和绕图象中心的小角度的旋转问题，前者采用重采样的小图象进行相关匹配，在解决后一个问题时，采用了包含小角度徒转的三参数模型。