词汇的语义表征及其启动效应研究现状与问题

语义启动是研究语义表征的主要范式。在过去的30年里,通过对语义启动效应的研究,词汇的语义表征理论也从符号联结发展到神经联结,其影响因素也逐步重视多方面的交互作用。究其问题,已有研究还存在很多不一致的结论,对语义内在的表征机制和学习机制缺乏深入了解,对影响语义表征的个体因素考虑不多。

基于外部信息源的WWW图像语义提取研究

HTML 文档作为 WWW 图像的外部信息源和载体,蕴涵了丰富的描述图像內容的文本信息。为了实现基于语义的 WWW 图像检索,本文提出了一种 WWW 图像语义表征模型和图像语义词典的建设方法,给出了一种利用图像语义词典从嵌有 WWW 图像的 HTML 网页的相关外部文本信息中提取 WWW 图像语义信息的具体方法和实验结果。

中—日—英三语词汇语义通达研究

目的：验证中-日-英三语的词汇语义通达模型，丰富语言模型理论研究。方法：采用跨语言长时重复启动范式来探讨中-日-英三语者的记忆表征模型。本研究采用2×3×3混合实验设计，自变量为测试词类型（已学、未学）、学习阶段呈现的语言（中文、日文、英文）和测验阶段呈现的语言（中文、日文、英文）。因变量为正确率和反应时。整个实验阶段分为学习和测验两个阶段。测验阶段材料分为已学和未学两类。在学习阶段，要求被试做判断生物词或非生物词；测验阶段要求被试判断真假词。结果初步证明对于日语系学生的中-日-英三语的记忆表征模型为词汇连接模型，即，第二熟练的语言的概念获得要先经过第一语言的词汇认知。

A New Method of Semantic Network Knowledge Representation Based on Extended Petri Net

Abstract： It was discussed that the way to reflect the internal relations between judgment and identification, the two most fundamental ways of thinking or cognition operations, during the course of the semantic network knowledge representation processing. A new extended Petri net is defined based on qualitative mapping, which strengths the expressive ability of the feature of thinking and the mode of action of brain. A model of semantic network knowledge representation based on new Petri net is given. Semantic network knowledge has a more efficient representation and reasoning mechanism. This model not only can reflect the characteristics of associative memory in semantic network knowledge representation, but also can use Petri net to express the criterion changes and its change law of recognition judgment, especially the cognitive operation of thinking based on extraction and integration of sensory characteristics to well express the thinking transition course from quantitative change to qualitative change of human cognition.