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Zhijian Li

5 accepted papers

2024

Generating Hard-Negative Out-of-Scope Data with ChatGPT for Intent Classification

COLING 2024main

Intent classifiers must be able to distinguish when a user’s utterance does not belong to any supported intent to avoid producing incorrect and unrelated system responses. Although out-of-scope (OOS) detection for intent classifiers has been studied, previous work has not yet studied changes in clas…

2024

Your Stereotypical Mileage May Vary: Practical Challenges of Evaluating Biases in Multiple Languages and Cultural Contexts

COLING 2024main

Warning: This paper contains explicit statements of offensive stereotypes which may be upsetting The study of bias, fairness and social impact in Natural Language Processing (NLP) lacks resources in languages other than English. Our objective is to support the evaluation of bias in language models i…

Cited by 8SourcePDFScholar
2021

A Hybrid Stochastic Gradient Hamiltonian Monte Carlo Method

AAAI 2021technical

Recent theoretical analyses reveal that existing Stochastic Gradient Markov Chain Monte Carlo (SG-MCMC) methods need large mini-batches of samples (exponentially dependent on the dimension) to reduce the mean square error of gradient estimates and ensure non-asymptotic convergence guarantees when t…

Cited by 3SourcePDFScholar
2021

SHPOS: A Theoretical Guaranteed Accelerated Particle Optimization Sampling Method

IJCAI 2021poster

Recently, the Stochastic Particle Optimization Sampling (SPOS) method is proposed to solve the particle-collapsing pitfall of deterministic Particle Variational Inference methods by ultilizing the stochastic Overdamped Langevin dynamics to enhance exploration. In this paper, we propose an accelerate…

Cited by 0SourcePDFScholar