Estimation of General Stationary Processes by Variable Length Markov Chains

We develop new results about a sieve methodology for the estimation of minimal state spaces and probability laws in the class of stationary processes defined on finite categorical spaces. Using a sieve approximation with variable length Markov chains of increasing order, we show that an adapted version of the Context algorithm yields asymptotically correct estimates for the minimal state space and for the underlying probability distribution. As a side product, the method of sieves yields a nice graphical tree representation for the potentially infinite dimensional minimal state space of the data generating process, which is very useful for exploration of the memory.     

《金瓶梅》中述补带宾句式考察

述补结构历来是近代汉语语法研究的一个热点，许多问题尚无定 论。本文以现代汉语为参照，考察述补（包括传统的动结式和动趋式）带宾结构的述语动词， 补语和宾语在《金瓶梅》中的四种成分序列，及述补带宾结构的否定形式 。研究表明，《金瓶梅》时代，汉语已发展到相当成熟的阶段，一定程度上可 以认为是早期现代汉语的代表。     

MIMO通信系统的信道估计及其FPGA实现

本文提出在4发多收天线配制的MIMO系统中基于训练序列的信道估计算法,详细研究了该算法的FPGA实现。采用我们提出的FPGA实现方法可以大大减少信道估计中矩阵乘法操作。实测结果表明实现方案很好的吻合了理论值。     

李清照词之画意

诗和画历来有着相通之处。李清照是以词名世的 ,同时由于社会风气的陶冶和家庭环境的影响 ,她在绘画方面也有很高的艺术修养 ,于是有意无意地将绘画的手法、技巧包括形象、气韵、色调及运笔运用到填词当中 ,故使得她的词具有浓厚的画意。     

DOS下中断方式打印编程方法指南

本文简述了ＤＯＳ环境下实时监控系统中采用中断方式打印的必要性，并结合打印机接口数据传输时序论述了设计中断方式打印程序的一般方法和用Ｃ６．０编制的相应程序。     

非相干硬判决多进制直扩系统的门限选取

首先介绍一种采用非相干硬判决的多进制直扩通信系统的构成和原理，然后推导出一套在高斯白噪背景和窄带干扰下系统的纠错前符号差错率估算公式，并研究最佳门限问题。最后给出一些数值结果并简单总结全文。     

若干伪随机序列构造及其在信息隐藏中的应用

给出了若干适用于信息隐藏技术的伪随机序列生成算法,并就这些伪随机序列的最小周期、线性复杂度、游程分布、实现效率进行了初步讨论,提出了对利用伪随机序列进行信息埋藏常规方法的一种改进.目的是充分利用遮盖信息中可隐藏信息空间,可先验地确定给定遮盖信息中可隐藏信息的长度.     

20世纪音乐视界的开拓与探索——关于勋伯格和序列音乐

世纪中叶以来,音乐语言向多元化发展和分化,各种手法的产生、发展和消亡表现得相当错综复杂.这是音乐文化发展的必然过程,是音乐视野日趋丰富的表现,其中勋伯格的音乐学说和他的创作是音乐语言向多元化发展和分化中最具有代表性的,也是影响最大生命力最强的,是20世纪音乐创作中极其有意义的探索和开拓.介绍序列音乐的形成以及它的各种结构和形式,基本的原则和技法特点.根据其最独特或者说独有的某-种手法,管窥它的魁力和价值.     

A fixed sequence Bonferroni procedure for testing multiple endpoints

A method for controlling the familywise error rate combining the Bonferroni adjustment and fixed testing sequence procedures is proposed. This procedure allots Type I error like the Bonferroni adjustment, but allows the Type I error to accumulate whenever a null hypothesis is rejected. In this manner, power for hypotheses tested later in a prespecified order will be increased. The order of the hypothesis tests needs to be prespecified as in a fixed sequence testing procedure, but unlike the fixed sequence testing procedure all hypotheses can always be tested, allowing for an a priori method of concluding a difference in the various endpoints. An application will be in clinical trials in which mortality is a concern, but it is expected that power to distinguish a difference in mortality will be low. If the effect on mortality is larger than anticipated, this method allows a test with a prespecified method of controlling the Type I error rate. Copyright © 2003 John Wiley & Sons, Ltd.     

Parameter Estimation in Pair-hidden Markov Models

Abstract.  This paper deals with parameter estimation in pair-hidden Markov models. We first provide a rigorous formalism for these models and discuss possible definitions of likelihoods. The model is biologically motivated and therefore naturally leads to restrictions on the parameter space. Existence of two different information divergence rates is established and a divergence property is shown under additional assumptions. This yields consistency for the parameter in parametrization schemes for which the divergence property holds. Simulations illustrate different cases which are not covered by our results.