基于语料库的搭配和类联接研究——以回指概念外壳名词为例

搭配是语言中横组合关系的词项间的习惯性共现,类联接是比搭配更高一级的词汇与语法之间的共现关系。对英语中搭配和类连接的研究不应局限于短语或小甸,而应扩展到语篇层面。文章以回指概念外壳名词为例,进行基于语料库的与语篇功能相连的搭配和类连接的研究。结果显示,外壳名词在评价力的强度、类连接构式的倾向性、对前置修饰语的依赖度、语篇类型的敏感度方面都存在诸多差异。     

Complete moment convergence of widely orthant dependent random variables

It is known that the dependence structure of widely orthant dependent (WOD) random variables is weaker than those of negatively associated (NA) random variables, negatively superadditive dependent (NSD) random variables, negatively orthant dependent (NOD) random variables, and extended negatively dependent (END) random variables. In this article, the results of complete moment convergence and complete convergence are presented for WOD sequence under the same moment conditions as independent sequence in classical result (Chow 1988 Chow, Y. (1988). On the rate of moment convergence of sample sums and extremes. Bull. Inst. Math. Acad. Sin. 16(3):177–201. [Google Scholar]).     

String decomposition of full-period tausworthe sequences

Because of their nice properties relative to the frequency of occurrence of n-tuples, Tausworthe sequences have been used frequently in recent years as the basis for random number generators. This paper describes a similar result relative to the frequency of occurrence of maximal-length strings of like bits. In particular, for any full-period Tausworthe sequence, the distribution of string lengths is precisely equal to the expected distribution of string lengths for a truly random bit sequence of comparable size.     

譜分析和滤波兼容的模拟系統

本文利用序列的双重性原理对移动傅立叶变换作了深入的研究.根据频率采样理论,将模拟系统的传递函数H(ω)分解为若干子系统之和,并画出其结构框图,这个系统可以用来测量模拟信号的移动离散谱,也可用作低通、带通或梳状滤波器.最后还给出实现该系统的具体方框图.     

汉语的词语搭配和义征的提取辨析

语义分析的难点和关键是义征的提取 ,而通常对此叙述过于简略 ,更少有义征提取程序和技巧的探讨。本文就客方所提四对近义词的搭配对象问题 ,运用“五步骤”分析法讨论近义复合词之间的义征异同。通过微观研究探讨提取义征的程序和技能 ,以推动语义语法学研究的进展。并进一步提出 :1 .作为解释自然语言的元语言 ,义征的一些术语在自然语言中并不使用 ,但义征定名力求基于系统性通筹考虑。 2 .词语之间能否搭配 ,取决于双方是否存在耦合性义征或语义兼容性。 3 .词语之间的语义搭配 ,受制于认识事理性、情境模型性、社群习用性和个人超常性四条基本原则     

论诗的意象组合

意象是诗的细胞、是诗的原件,意象活动构成诗歌创作的整个过程。本文从意象组合的实质、意象组合的基本表达方式以及意象组合的手法等三个视角和层面指出了诗是由意象构成的,并在意象的组接、发展及转换中形成诗,从而揭示出诗的本质所在和诗的现实所在。     

Detecting homogeneous segments in DNA sequences by using hidden Markov models

In recent years there has been a rapid growth in the amount of DNA being sequenced and in its availability through genetic databases. Statistical techniques which identify structure within these sequences can be of considerable assistance to molecular biologists particularly when they incorporate the discrete nature of changes caused by evolutionary processes. This paper focuses on the detection of homogeneous segments within heterogeneous DNA sequences. In particular, we study an intron from the chimpanzee α-fetoprotein gene; this protein plays an important role in the embryonic development of mammals. We present a Bayesian solution to this segmentation problem using a hidden Markov model implemented by Markov chain Monte Carlo methods. We consider the important practical problem of specifying informative prior knowledge about sequences of this type. Two Gibbs sampling algorithms are contrasted and the sensitivity of the analysis to the prior specification is investigated. Model selection and possible ways to overcome the label switching problem are also addressed. Our analysis of intron 7 identifies three distinct homogeneous segment types, two of which occur in more than one region, and one of which is reversible.     

Variants of the graph dependent model in extreme value theory

With a set X₁, X₂, .... X_n n random variables, a graph is associated whose vertices are the integers 1,2,..., n and whose edges represent those pairs i and j for which the events {X_i>X} and {X_j>X} do not become “almost independent” for “large X”. With a variety of assumption on the edge set of the graph, the asymptotic distribution of the extremes of the X_j, when properly normalized, is determined. This refines the earlier result of the present author on this kind of dependence, and extends and unifies several known dependent extreme value models.     

当今词语的“变脸”的方式及其动因探究

新世纪形成了词语发展的又一个高峰,旧词语的"变脸"已成了语言新陈代谢的一种常见方式。在大脑的类推和重新分析的思维机制下,人们用隐喻、转喻、仿词、别解、委婉、超常搭配或起用方言词、古语词等方式赋予旧词以新义,或者改变一个旧词的用法,从而弥补了语言表达的空位,满足了受众的求异心理,在经济省力的前提下达到最佳的交际效果。     

英语词语搭配机制初探

英语中词语搭配是否有规律可循这是长期以来人们一直探索的课题。从人类认知的角度,运用认知语言学观点与理论来分析、透视英语搭配现象、探索其中的规律,发现英语搭配与认知形式密不可分,概念范畴化是基础,语言的拟象性和意象性、隐喻是决定词的搭配形式的重要内在因素。