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Xiangheng He

6 accepted papers

2025

Improving Unsupervised Constituency Parsing via Maximizing Semantic Information

ICLR 2025spotlight

Unsupervised constituency parsers organize phrases within a sentence into a tree-shaped syntactic constituent structure that reflects the organization of sentence semantics. However, the traditional objective of maximizing sentence log-likelihood (LL) does not explicitly account for the close relat…

2025

ProsodyFM: Unsupervised Phrasing and Intonation Control for Intelligible Speech Synthesis

AAAI 2025technical

Prosody contains rich information beyond the literal meaning of words, which is crucial for the intelligibility of speech. Current models still fall short in phrasing and intonation; they not only miss or misplace breaks when synthesizing long sentences with complex structures but also produce unnat…

2024

Language Model Based Unsupervised Dependency Parsing with Conditional Mutual Information and Grammatical Constraints

NAACL 2024long

Previous methods based on Large Language Models (LLM) perform unsupervised dependency parsing by maximizing bi-lexical dependence scores. However, these previous methods adopt dependence scores that are difficult to interpret. These methods cannot incorporate grammatical constraints that previous gr…

Cited by 0SourcePDFScholar
2024

Task Selection and Assignment for Multi-Modal Multi-Task Dialogue Act Classification with Non-Stationary Multi-Armed Bandits

ICASSP 2024accepted

Multi-task learning (MTL) aims to improve the performance of a primary task by jointly learning with related auxiliary tasks. Traditional MTL methods select tasks randomly during training. However, both previous studies and our results suggest that such a random selection of tasks may not be helpful…

Cited by 1SourceScholar
2024

Unsupervised Parsing by Searching for Frequent Word Sequences among Sentences with Equivalent Predicate-Argument Structures

ACL 2024findings

Unsupervised constituency parsing focuses on identifying word sequences that form a syntactic unit (i.e., constituents) in target sentences. Linguists identify the constituent by evaluating a set of Predicate-Argument Structure (PAS) equivalent sentences where we find the constituent appears more fr…

Cited by 1SourcePDFScholar
2022

Modeling Syntactic-Semantic Dependency Correlations in Semantic Role Labeling Using Mixture Models

ACL 2022long

In this paper, we propose a mixture model-based end-to-end method to model the syntactic-semantic dependency correlation in Semantic Role Labeling (SRL). Semantic dependencies in SRL are modeled as a distribution over semantic dependency labels conditioned on a predicate and an argument word. The se…