An Investigation of two Sequence-Comparison Statistics

This paper describes an investigation of two statistics which compare two ordered sequences of objects by providing a measure of the discordance when the sequences are slotted together. Configurations having zero discordance are described. Plausible null models for data are postulated, and an account is given of a simulation study which investigated the distribution of the statistics when these models were used in the analysis of physical logging data from two wells.     

Some Results on Modeling Biological Sequences and Web Navigation with a Semi Markov Chain

In the article, the entrance probabilities and the probability distribution of the number of transitions to a state are studied to provide some answers to questions related to state occupancies for the semi Markov model. Biological sequences and Web navigation are two cases that initially seem to be different but to a certain extent they do have similarities. Two main aspects of word occurrences in biological sequences are: (a) where do they occur and (b) how many times do they occur. In Web navigation the similar questions are (a) when a node is visited and (b) how many times a node is visited. So, the theoretical results of this study are applied to model these two cases and derive distributions of word location or node occurrence and frequency of occurrences. Rewards/costs are included in the Web navigation model and analytic forms for the means, variances, and moments of total interval rewards/costs are provided.     

国外程式语加工研究概述

此文梳理了国外程式语加工的研究,得出结论：此类研究虽然起步较晚,但已受到越来越多的关注与研究,取得了一些初步的研究成果.后续研究应基于多种方法,考察不同群体（尤其是外语学习者）对不同类型程式语的加工问题.     

认知视角下的程式语心理表征与译语词汇提取研究

程式语心理表征在认知加工过程中具有其独特的存储、提取优势,善加利用可以使翻译交际变得流畅、高效。“在线语法判断”和“在线词汇翻译”两项实验任务旨在研究程式语心理表征对译语词汇提取质量的影响。研究表明,高二语水平者程式语心理表征质量明显优于低二语水平者;程式语心理表征水平与译语词汇提取流利度、准确度呈正相关;不同类型的程式语表征对译语词汇提取质量具有不同的预测力。     

中国学习者与本族语者使用情态动词“should”的对比研究

英语情态动词是说话人表达允许、可能、义务、预测等意义的重要手段,由于其在句法和语义上的特殊性,情态动词在语言研究中一直受到广泛重视。本研究发现,中国学习者与英国本族语者在情态动词should的搭配及语义表达上存在一定的差异。     

Functional Estimation of a Density Under a New Weak Dependence Condition

The purpose of this paper is to prove, through the analysis of the behaviour of a standard kernel density estimator, that the notion of weak dependence defined in a previous paper (cf. Doukhan & Louhichi, 1999) has sufficiently sharp properties to be used in various situations. More precisely we investigate the asymptotics of high order losses, asymptotic distributions and uniform almost sure behaviour of kernel density estimates. We prove that they are the same as for independent samples (with some restrictions for a.s. behaviours). Recall finally that this weak dependence condition extends on the previously defined ones such as mixing, association and it allows considerations of new classes such as weak shifts processes based on independent sequences as well as some non-mixing Markov processes.     

语料库数据驱动下的程式语与协商系统研究

程式语是指日常使用的套话以及多少具备相对固定的句法和语篇结构的口头或书面话语。它以其整体性、易于提取性不但成为实现概念意义的重要方式,而且也成为实现协商意义的主要潜势。从语篇语义视角看,人际意义通过协商系统实现,协商系统通过言语功能系统实现,言语功能系统又通过语气系统实现,语气系统最终由程式语和非程式语实现。那么,程式语在语气系统中通过什么样的结构实现协商系统中的言语功能,这一话题迄今还鲜有研究者对其进行全面的探究。因此,以系统功能语言学相关理论为依据,以语料库数据驱动为研究方法,以情景喜剧《老友记》为语料。研究发现,不同的具有一定结构的程式语分别实现信息与物品和服务的交换,从而不但实现了言语功能,也完成了意义的协商。     

Extensions of Fill's algorithm for perfect simulation

Fill's algorithm for perfect simulation for attractive finite state space models, unbiased for user impatience, is presented in terms of stochastic recursive sequences and extended in two ways. Repulsive discrete Markov random fields with two coding sets like the auto-Poisson distribution on a lattice with 4-neighbourhood can be treated as monotone systems if a particular partial ordering and quasi-maximal and quasi-minimal states are used. Fill's algorithm then applies directly. Combining Fill's rejection sampling with sandwiching leads to a version of the algorithm which works for general discrete conditionally specified repulsive models. Extensions to other types of models are briefly discussed.     

关于两类相关列加权和的稳定性

本文讨论了两两PQD列及两两NQD列两类相关列的加权和的稳定性。