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Hartung, Matthias: Distributional Semantic Models of Attribute Meaning in Adjectives and Nouns. 2015
Inhalt
Introduction
Life Cycle of Knowledge in Natural Language Processing
Knowledge Induction from Text
Attribute Knowledge in Knowledge Consumers and Knowledge Creators
Attribute Meaning
Thesis Overview
Foundations of Distributional Semantics
Distributional Hypothesis
Meaning Representation in Distributional Semantic Models
Variants of Distributional Semantic Models
Conceptual and Notational Foundations
Structured vs. Unstructured Models
Syntagmatic vs. Paradigmatic Models
First-order vs. Second-order Models
Meaning Representation beyond the Word Level
Related Work
Adjective Classification
Attribute Learning
Structured Models in Distributional Semantics
Topic Models in Distributional Semantics
Distributional Models of Phrase Meaning
Distributional Enrichment of Structured Models
Distributional Models of Attribute Meaning
Research Questions
Identifying Attribute-denoting Adjectives
Compositional Representations of Attribute Meaning in Adjective-Noun Phrases
Distributional Enrichment
Contributions of this Thesis
Classification of Adjective Types for Attribute Learning
Corpus Annotation and Analysis
Classification Scheme
Annotation Process
Agreement Figures
Re-Analysis: Binary Classification Scheme
Class Volatility
Automatic Type-based Classification of Adjectives
Features for Classification
Heuristic Generation of Training Instances from Seeds
Data Set Construction
Experimental Evaluation
Discussion
Summary
Attribute Selection from Adjective-Noun Phrases: Models and Parameters
Foundations of Structured Distributional Models for Attribute Selection
Attribute-based Distributional Representations of Adjective and Noun meaning
Vector Composition Functions
Attribute Selection Functions
Pattern-based Distributional Model
Lexico-syntactic Patterns for Attribute Acquisition
Model Parameters
Distributional Attribute Models based on Weakly Supervised Topic Models
Background: Probabilistic Topic Models
Integrating Latent Topics into Distributional Attribute Models
Summary
Attribute Selection: Experimental Evaluation
Construction of Labeled Data Sets
Core Attributes Gold Standard
Large-scale Gold Standard
Summary of Data Sets
Evaluation of the Pattern-based Attribute Model
Experiment 1: Attribute Selection from Adjective Vectors
Experiment 2: Attribute Selection from Noun Vectors
Experiment 3: Attribute Selection from Phrase Vectors
Discussion
Evaluation of Topic-based Attribute Models
Experiment 4: Topic-based Attribute Selection on Core Attributes
Smoothing Power
Experiment 5: Large-scale Attribute Selection
Re-Training on Confined Subsets of Attributes
Discussion
Summary
Explaining C-LDA Performance in Large-scale Attribute Selection
Explanatory Variables
Semantic Features
Morphological Features
Ambiguity Features
Frequency Features
Uncertainty Features
Vector Quality Features
Compositionality in C-LDA
Linear Regression of C-LDA Performance at the Intersection of Word and Phrase Meaning
Foundations of Linear Regression Modelling
Phrase Level: Least Squares Regression of Phrase Vector Quality
``Zooming in'': Regression of Word Vector Quality
Compositional Processes: Linking Word and Phrase Level
Major Findings and Discussion
Options for Enhancing C-LDA Performance
Summary
Distributional Enrichment: Improving Structured Vector Representations
General Idea and Overview
Auxiliary Distributional Models
Benchmarking First- and Second-order Auxiliary Models for Attribute-preserving Carrier Selection
Benchmark Results
Distributional Enrichment for Attribute Selection
Paradigmatic Distributional Enrichment
Syntagmatic Distributional Enrichment
Joint Distributional Enrichment of Adjective and Noun Vectors
Experiment 6: Large-scale Attribute Selection after Distributional Enrichment
Experimental Settings
Experimental Results
Evaluation on Test Set
Discussion
Summary
Conclusions
Contributions of this Thesis
Conclusions and Perspectives
Different Attribute Inventories
Core Attributes
Property Attributes
Measurable Attributes
WebChild Attributes
Large-scale Attribute Data Set
Annotation Instructions for Acquisition of HeiPLAS Gold Standard
Background and Task Definition
Functionality of the User Interface
Classification Guidelines
General Instructions
Classification Test
``Compositionality Puzzles'': Examples from HeiPLAS Development Data