A Corpus-based Study on Self-repairs in Chinese EFL Learners' Spoken English

Self-repair mentioned in this paper actually refers to self-initiated same-turn self-repair,which comprises a particular set of repair strategies in which trouble source and repairing segments occur in the same turn and the repair is both initiated and performed by the speaker of trouble source. This study aims to study the self-repair behaviour of Chinese EFL learners based on the Spoken English Corpus of Chinese Learners as the observing corpus and the reference corpus SBNC. This study is mainly concerned...     

维吾尔文字识别技术中的切分算法研究

在许多文字识别系统中,字符切分是预处理阶段的重要环节,其目的是从文本图像中分离出字母图像,然后针对切分后的每个字母进行识别。为了达到字符切分的目的首先要切分出文本图像中的每一个连体字母段。本文将彩色图像转换为灰度化的边缘图像,其次对图像进行局域二值化,再进行区域检测,初步实现了图像中维吾尔文字行的定位,然后根据定位结果从图像中切分出文字行,统计切分后的文字行在水平和垂直方向上的像素累计情况,查找最佳切分点,分离出文字行中的字母独立形式或几个字母连成的连体字母段,对后面的字符切分打了很好的基础。实验结果表明,文字行的切分准确率达到92％,字切分准确率达到90％以上。     

语料库语言学与外语教学研究

语料库语言学是根据语料库提供素材进行语言研究的一门新兴学科．本文讨论语料库语言学的理论基础，历史背景及其在外语教学中的应用．     

维吾尔语陈述句语调的起伏度

该文基于语调格局的研究思路,采用语调起伏度的计算方法,初步对维吾尔语标准语发音人的陈述语句语料进行了定量分析,考察语句调域(总调域)和调群调域(分调域)的音高表现。研究结果表明:划分总调域和分调域、计算起伏度的方法可以对于语句音高进行量化分析,从而实现不同发音人之间的可比性,进一步可以探求维吾尔语陈述句语调起伏度的分布特征。     

Efficacy of magnetic resonance diffusion tensor imaging and three-dimensional fiber tractography in the detection of clinical manifestations of central nervous system lupus

Systemic lupus erythematosus (SLE) is an autoimmune disease frequently associated with neuropsychiatric manifestations. No follow-up case report has characterized white matter alterations in patients with neuropsychiatric lupus erythematosus (NPSLE) before and after treatment. In this study, a 16-year-old NPSLE patient with severe neuropsychological symptoms was treated with steroid pulse therapy, and was scanned with conventional magnetic resonance (MR) and diffusion tensor imaging (DTI) at onset and 17 months after treatment. Conventional MR images showed diffuse brain atrophy and focal vasogenic edema in the putamen, but they did not reveal abnormalities in the corpus callosum. Region-of-interest analysis of DTI images showed that fractional anisotropy and fiber tracts increased significantly, while axial diffusivity, radial, and mean diffusivity decreased significantly in the corpus callosum after treatment. The results indicated that the vasogenic edema was present in the corpus callosum at onset and was significantly reduced after treatment. These changes were generally compatible with the patient’s clinical manifestations. Hence, we concluded that MR-DTI and fiber tractography are helpful to reveal the relationship between white matter alterations and neurological dysfunctions in NPSLE patients.     

Biogeographic origin prediction of three continental populations through 42 ancestry informative SNPs

A biogeographic estimate of a certain population can not only discern population substructure in the whole genome association study, but also provide informative clues for forensic investigations when obtained DNA genotypes do not find a match in the available forensic DNA database. In this study, 100 ancestry informative single nucleotide polymorphisms (AISNPs) were first presented to differentiate three continental ancestries (African, East Asian and European). Ultimately, forty-two AISNPs were chosen from the 100 AISNPs. Distinguishing power of the 100 and 42 AISNPs for differentiating continental populations was further evaluated with population cluster analyses. Results indicated both of AISNP sets could efficiently differentiate 11 training populations from the three continents. Further validation of 42 AISNPs in testing population set indicated these 42 AISNPs performed well for ancestry inferences of these testing individuals. Ancestry components of Uyghur group were assessed by comparing with different continental populations based on these 42 AISNPs. Results revealed that East Asian populations contributed more ancestry components to the studied Uyghur group than European populations. In conclusion, our study is expected to provide more AISNP markers and enrich extant reference database.     

基于蛋白质组学技术筛查维吾尔族妇女宫颈癌前病变患者血浆蛋白预警标志物

 依托蛋白质二维液相色谱和质谱技术,寻找与新疆维吾尔族妇女宫颈癌癌前病变高度宫颈鳞状上皮内瘤样变(HSIL)相关的血浆预警蛋白标志物,旨在对宫颈癌做到早期预防和诊断。收集维吾尔族HSIL(21例)和宫颈炎(22例)患者血浆标本并制备血浆低丰度蛋白质组样品,通过对蛋白质二维液相色谱系统的分离与鉴别分析,筛选出差异表达的组分,并运用质谱和生物信息学技术进行鉴定和功能识别分析。确定了宫颈炎和HSIL患者的基于蛋白质等电点和疏水性特征的血浆低丰度蛋白质组图谱,筛选出10个差异表达蛋白组分。结果表明,在HSIL患者血浆中3个低丰度蛋白组分含量明显上升,1个组分含量下降;而通过质谱技术鉴定出31种蛋白质,其中4种蛋白质与肿瘤进程密切相关,分别是代谢相关蛋白(APOA1)、信号转导相关蛋白(mTOR、EphA3)和免疫功能相关蛋白(HLA-DQB1)。本文针对维吾尔族妇女这一宫颈癌高发人群,展开癌前病变患者血浆低丰度蛋白组表达水平的研究,鉴定出多种差异表达血浆蛋白预警标志物,为本区宫颈癌的预防和早期鉴别诊断及癌变机制研究提供了依据。     

维吾尔语框架语义例句辅助标注系统的设计与实现

构建维吾尔语框架语义知识库是自然语言处理的基础性工程,目前大部分工作基于人工。从真实语料库中抽取包含将要描述词元的例句,为例句标注以及这些例句的配价模式进行深入研究,从标注好的维吾尔语例句中提取维吾尔语词元和例句填充到维吾尔语框架库,构建维吾尔语词元库和例句库,实现维吾尔语语义框架网络的自动构造之目的。本文对维吾尔语真实语料库中抽取的例句中标注对象进行初步分析,论述了人机交互式基于阿拉伯字符的UFN例句辅助标注系统的功能模块设计和工作流程。介绍了UFN例句辅助标注系统的例句标注界面和词元标注报告、词条报告的自动生成演示界面。     

信息处理维吾尔语词语分类体系及标记研究（I）

维吾尔语词性标注研究,是面向信息处理的维吾尔语语法分析的核心内容．本文提出面向信息处理的现代维吾尔语词语分类体系及其标记集,并且对分类体系中的12个词类的分布特征从形态变化、句子成分功能和短语组合功能等方面进行了描述．     

SUSANNE语料库中语法规则的抽取

近年来自然语言理解的研究中,语料库占有越来越重要的地位。将现实中真实的语言材料经过语言专家分析和加工,集中到一个库里面,然后计算机专家通过计算机技术从语料库中获取有用的知识从而指导自然语言处理系统的开发与研究已经成为常用的方法。语料库中语法规则的抽取是语料库数据预处理重要的一环,本文基于中山大学软件研究所WordHelp项目,讨论了SUSANNE语料库中抽取英文语法规则的问题。