似然比

SNR maximum likelihood estimator based on data directed decision was evaluated first, and was concluded as a biased estimator. An unbiased estimator can be acquired through high order moments of received data.

摘要通过对基于判决反馈的信噪比最大似然估计推导过程的分析，得出：判决反馈最大似然估计得到的估计值是有偏估计；利用基带数据的高阶矩特性，可以获得渐近无偏估计。

In Chapter 2,stochastic temporal reasoning is studied.By adding simple a priorknowledge and using hypothesis detection theory,the matching method of threequalitative temporal relations is constructed.The performance of this method isanalyzed,and the main factors which affect the matching performance are pointed out.

本文第二章研究统计时间推理，在这一章中，通过首先添加简单的先验专家知识，然后利用似然比检验的方法，给出了对三种定性时间关系的匹配方法，并分析了匹配的性能，明确了影响匹配性能的主要因素。

Beamlet transform is a multiscale geometric analysis based on dyˉ adicallyˉoriginazed collection of line segments.

先通过线积分计算各分块的Beamlet变换，再利用广义似然比检验寻找保留符合条件的 Beamlet，提取线特征。

Having dyadic and recursive subdivision on image,having integral on Beamlet in each sub-square,the straight lines were approximated under GLRT and reconstructed.

利用一种Beamlet变换算法来提取遥感图像中的线性特征，通过对遥感图像按二进、递归进行划分，利用灰度信息，积分计算每一小块图像中的Beamlets，结合梯度信息，通过广义似然比检验GLRT(generalized likeli-hood ratio testing)来检测判断符合条件假设的Beamlets，重建线性目标。

SQUA genes of Dendrocalamus latiflorus were sequenced, and phylogenetic form on SQUA genes in angiosperms was analyzed. Relative rate and adaptive evolution after SQUA gene duplication in recent common ancestor of monocots and eudicots were analyzed using the methods of relative rate test, statistic on synonymous and non-synonymous coden substitution sites and likelihood rate test.

测定了麻竹的SQUA基因序列并分析了被子植物中SOUA类基因的系统发育式样；采用相对速率检验、同义与非同义置换位点统计以及似然比检验方法，分析了单子叶和真双子叶植物最近共同祖先中SQUA基因发生基因重复后的进化速率与适应机制。

The application of nonextensive distribution model for sea clutter modeling and small targets detecting is improved. Surrogate data method is used to analyze nonlinear character of sea clutter.

本文分析了海杂波在统计模型建模后运用最大似然比检测准则下，很难检测出弱小目标的缺陷，改进了非广延分布模型在海杂波建模和弱小目标检测领域的应用。

Methods\ By means of analyzing the echo signal from the ultrasonic detector, the features of the echo signal as a criteria related to the adhesive state had been extracted with maximum likelihood ratio method modeling to test the rocket motors sample of which inner surface the liner is cladded on .

方法通过对超声检测探头拾取的回波信号进行分析，提取出作为脱粘识别判断依据的信号特征量，利用似然比方法建立模型，对贴有绝热包覆层的发动机试件进行检测。

Minimum mean-square error decision feedback equalizer was used to preprocess this model and a decoder with boundary controlled Fano tree search algorithm was proposed.

该解码器可达到几乎最大似然性能，在很大的信噪比区域范围内其复杂度比目前典型的解码器低，而且该解码器可用于发射天线数大于接收天线数的系统。

An effective algorithm is proposed, which is based on hard-decision for some specially received symbols far away from normal symbols on the constellation. Then according to the distance between received symbols and decoded symbols, the pseudo Log-Likelihood-Ratio is calculated, and taken as the pseudo initialization information for the next iteration.

该算法首先对接收符号星座图中特别奇异点进行硬判决&校正&，然后利用接收符号和译码判决符号在星座图中的距离，在每次迭代前计算符号的伪似然比，作为下次迭代的伪初始信息。

This paper presents a method of automatically increasing new collocations by the use of the collocations provided by a machine readable dictionary XianDaiHanYuCiHai; In order to assuring the learning quality, the size of context was enlarged gradually; In the procedure of learning and word sense disambiguating, author gives a multi maximal log word sense disambiguation algorithm.

本文用机器可读词典《现代汉语辞海》提供的搭配实例作为多义词的初始搭配知识，采用适当的统计和自组织方法自动扩大搭配集；为保证学习质量，在学习过程中逐渐增大上下文窗口的长度；提出使用搭配统计表的多元最大对数似然比词义排歧算法。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。