Using LSA and text segmentation to improve automatic Chinese dialogue text summarization

Automatic Chinese text summarization for dialogue style is a relatively new research area. In this paper, Latent Semantic Analysis （LSA） is first used to extract semantic knowledge from a given document, all question paragraphs are identified, an automatic text segmentation approach analogous to Text＇filing is exploited to improve the precision of correlating question paragraphs and answer paragraphs, and finally some ＂important＂ sentences are extracted from the generic content and the question-answer pairs to generate a complete summary. Experimental results showed that our approach is highly efficient and improves significantly the coherence of the summary while not compromising informativeness.     

迷惘的反叛 垮掉的嚎叫--关于《北回归线》与《在路上》创作的比较研究

美国文学史中最有争议的作家之一亨利@米勒与20世纪60年代美国"垮掉的一代"文学主将杰克@凯鲁亚克,两位作家虽在年龄上悬殊了半个世纪,但就其作品,尤其是<北回归线>与<在路上>而言,无论在创作的主题、塑造的形象,还是艺术手法及创作态势上,都存在着某些相似之处.     

孤独症儿童中央统合功能特点研究述评

Frith1989年提出孤独症是一种以信息加工缺陷为特征的认知障碍后,孤独症儿童非社会性损伤已成为孤独症研究的一个热点。相关研究结果提示,孤独症儿童刻板的重复行为与狭隘的兴趣、特殊的知觉和注意以及超常技能等,可能与孤独症儿童中央统合功能不足有关。本文主要对孤独症儿童中央统合功能的非言语测验研究、言语测验研究进行梳理,并对孤独症儿童中央统合功能研究在完善研究方法、扩展研究范围、扩大研究对象等方面作出了展望。     

论连贯假设的关联性解释

正常的交际过程中存在对传递信息的关联性承诺和假设：说话人传递相关的信息;听话人期待和寻找相关信息。关联性假设在语篇理解中表现为连贯假设。读者假设前文所含信息与后继语篇内容在语义上存在相关性,并通过推理手段完成语篇连贯的重构。     

从语用学角度看语篇连贯——《傲慢与偏见》为例

语篇连贯作为构成语篇的关键,自本世纪60年代后成为语篇语言学研究的重要课题。本文拟从语用学角度出发运用言语行为理论,合作原则及礼貌策略对《傲慢与偏见》一文进行语篇连贯分析,从而更好的反映出故事的主题,人物性格特征及任务间的关系。     

Study on EEG power and coherence in patients with mild cognitive impairment during working memory task

To investigate the features of electroencephalography (EEG) power and coherence at rest and during a working memory task of patients with mild cognitive impairment (MCI). Thirty-five patients (17 males, 18 females; 52～71 years old) and 34 sex- and age-matched controls (17 males, 17 females; 51～63 years old) were recruited in the present study. Mini-Mental State Examination (MMSE) of 35 patients with MCI and 34 normal controls revealed that the scores of MCI patients did not differ significantly from those of normal controls (P＞0.05). Then, EEGs at rest and during working memory task with three levels of working memory load were recorded. The EEG power was computed over 10 channels: right and left frontal (F3, F4), central (C3,C4), parietal (P3, P4), temporal (TS, T6) and occipital (O1, O2); inter-hemispheric coherences were computed from five electrode pairs of F3-F4, C3-C4, P3-P4, T5-T6 and O1-O2 for delta (1.0～3.5 Hz), theta (4.0～7.5 Hz), alpha-1 (8.0～10.0 Hz), alpha-2 (10.5～13.0 Hz), beta-1 (13.5～18.0 Hz) and beta-2 (18.5～30.0 Hz) frequency bands. All values of the EEG power of MCI patients were found to be higher than those of normal controls at rest and during working memory tasks. Furthermore, the values of EEG power in the theta, alpha-1, alpha-2 and beta-1 bands of patients with MCI were significantly high (P＜0.05) in comparison with those of normal controls. Correlation analysis indicated a significant negative correlation between the EEG powers and MMSE scores. In addition, during working memory tasks, the EEG coherences in all bands were significantly higher in the MCI group in comparison with those in the control group (P＜0.05). However, there was no significant difference in EEG coherences between two groups at rest. These findings comprise evidence that MCI patients have higher EEG power at rest, and higher EEG power and coherence during working conditions. It suggests that MCI may be associated with compensatory processes at rest and during working memory tasks. Moreover, failure of normal cortical connections may be exist in MCI patients.     

The impact of relational markers on expository text comprehension in L1 and L2

This article reports on an experimentinvestigating the impact of causal discoursemarkers (connectives and signaling phrases) onthe comprehension of expository texts in L1 andL2. Although several psycholinguistic studieshave investigated the impact of connectives andlexical markers of text structure oncomprehension (i.e. off-line), there is noconsensus on the exact effect of explicitdiscourse markers on text understanding; threedifferent findings are reported in theliterature: markers would have a facilitatingeffect, an interfering effect or no effect atall. The first goal of this article is toclarify this problem of contradicting resultsby limiting the scope of the study to causalrelations, and to one specific text type:expository texts. Furthermore, the naturalnessof the experimental texts was controlled,readers did not need specific backgroundknowledge to understand the texts and theexperimental method consisted of open answerquestioning. Our second goal is to investigateto what extent a supposed effect of linguisticmarking depends on readers proficiency in afirst or second language.The experiment consisted in the reading of short expository texts in two languages, Dutchand French, which both functioned as L1 and L2.The results indicate that readers benefit fromthe presence of causal relational markers bothin L1 and in L2. Implications for (theoriesof) text processing are discussed, as well asfor the further insights in readingcomprehension in L1 and L2.     

3D wind-induced response analysis of a cable-membrane structure

Wind loading is a dominant factor for design of a cable-membrane structure. Three orthogonal turbulent components, including the longitudinal, lateral and vertical wind velocities, should be taken into account for the wind loads. In this study, a stochastic 3D coupling wind field model is derived by the spectral representation theory. The coherence functions of the three orthogonal turbulent components are considered in this model. Then the model is applied to generate the three correlated wind turbulent components. After that, formulae are proposed to transform the velocities into wind loads, and to introduce the modified wind pressure force. Finally, a wind-induced time-history response analysis is conducted for a 3D cable-membrane structure. Analytical results indicate that responses induced by the proposed wind load model are 10%-25% larger than those by the con- ventional uncorrelated model, and that the responses are not quite influenced by the modified wind pressure force. Therefore, we concluded that, in the time-history response analysis, the coherences of the three orthogonal turbulent components are necessary for a 3D cable-membrane structure, but the modified wind pressure force can be ignored.     

Coherence estimate between a random and a periodic signal: Bias, variance, analytical critical values, and normalizing transforms

The present work deals with recent results on the sampling distribution of the magnitude-squared coherence (also called just coherence) estimate between a random (Gaussian) and a periodic signal, in order to obtain analytical critical values, alternative expressions for the probability density function (PDF) as well as the variance and bias of the estimate. A comparison with the more general case of coherence estimation when both signals are Gaussian was also provided. The results indicate that the smaller the true coherence (TC) values the closer both distributions become. The behaviour of variance and bias as a function of the number of data segments and the TC is similar for both coherence estimates. Additionally, the effect of a normalizing function (Fisher's z transform) in the coherence estimated between a random and a periodic signal was also evaluated and normality has been nearly achieved. However, the variance was less equalized in comparison with coherence estimate between two Gaussian signals.     

A Study on the Coherence of Coleridge’s Frost at Midnight

As one of the greatest Romantic poet, Coleridge had contributed to the realm of poetry many remarkable works, of which conversation poems take a part. The author of this paper chooses one typical piece...