Search Results for author: Zhihan Zhou

Found 14 papers, 9 papers with code

USE: Dynamic User Modeling with Stateful Sequence Models

no code implementations20 Mar 2024 Zhihan Zhou, Qixiang Fang, Leonardo Neves, Francesco Barbieri, Yozen Liu, Han Liu, Maarten W. Bos, Ron Dotsch

Furthermore, we introduce a novel training objective named future W-behavior prediction to transcend the limitations of next-token prediction by forecasting a broader horizon of upcoming user behaviors.

Contrastive Learning

DNABERT-S: Learning Species-Aware DNA Embedding with Genome Foundation Models

1 code implementation13 Feb 2024 Zhihan Zhou, Weimin Wu, Harrison Ho, Jiayi Wang, Lizhen Shi, Ramana V Davuluri, Zhong Wang, Han Liu

To encourage effective embeddings to error-prone long-read DNA sequences, we introduce Manifold Instance Mixup (MI-Mix), a contrastive objective that mixes the hidden representations of DNA sequences at randomly selected layers and trains the model to recognize and differentiate these mixed proportions at the output layer.

Contrastive Learning

Combating Representation Learning Disparity with Geometric Harmonization

1 code implementation NeurIPS 2023 Zhihan Zhou, Jiangchao Yao, Feng Hong, Ya zhang, Bo Han, Yanfeng Wang

Self-supervised learning (SSL) as an effective paradigm of representation learning has achieved tremendous success on various curated datasets in diverse scenarios.

Representation Learning Self-Supervised Learning

Efficient Action Robust Reinforcement Learning with Probabilistic Policy Execution Uncertainty

no code implementations15 Jul 2023 Guanlin Liu, Zhihan Zhou, Han Liu, Lifeng Lai

Robust reinforcement learning (RL) aims to find a policy that optimizes the worst-case performance in the face of uncertainties.

reinforcement-learning Reinforcement Learning (RL)

DNABERT-2: Efficient Foundation Model and Benchmark For Multi-Species Genome

4 code implementations26 Jun 2023 Zhihan Zhou, Yanrong Ji, Weijian Li, Pratik Dutta, Ramana Davuluri, Han Liu

Decoding the linguistic intricacies of the genome is a crucial problem in biology, and pre-trained foundational models such as DNABERT and Nucleotide Transformer have made significant strides in this area.

Computational Efficiency Core Promoter Detection +9

Latent Class-Conditional Noise Model

1 code implementation19 Feb 2023 Jiangchao Yao, Bo Han, Zhihan Zhou, Ya zhang, Ivor W. Tsang

We solve this problem by introducing a Latent Class-Conditional Noise model (LCCN) to parameterize the noise transition under a Bayesian framework.

Learning with noisy labels

Long-Tailed Partial Label Learning via Dynamic Rebalancing

1 code implementation10 Feb 2023 Feng Hong, Jiangchao Yao, Zhihan Zhou, Ya zhang, Yanfeng Wang

The straightforward combination of LT and PLL, i. e., LT-PLL, suffers from a fundamental dilemma: LT methods build upon a given class distribution that is unavailable in PLL, and the performance of PLL is severely influenced in long-tailed context.

Partial Label Learning

KGML-xDTD: A Knowledge Graph-based Machine Learning Framework for Drug Treatment Prediction and Mechanism Description

no code implementations30 Nov 2022 Chunyu Ma, Zhihan Zhou, Han Liu, David Koslicki

We believe it can effectively reduce "black-box" concerns and increase prediction confidence for drug repurposing based on predicted path-based explanations, and further accelerate the process of drug discovery for emerging diseases.

Drug Discovery

Learning Dialogue Representations from Consecutive Utterances

1 code implementation NAACL 2022 Zhihan Zhou, Dejiao Zhang, Wei Xiao, Nicholas Dingwall, Xiaofei Ma, Andrew O. Arnold, Bing Xiang

In this paper, we introduce Dialogue Sentence Embedding (DSE), a self-supervised contrastive learning method that learns effective dialogue representations suitable for a wide range of dialogue tasks.

Contrastive Learning Conversational Question Answering +14

Contrastive Learning with Boosted Memorization

1 code implementation25 May 2022 Zhihan Zhou, Jiangchao Yao, Yanfeng Wang, Bo Han, Ya zhang

Different from previous works, we explore this direction from an alternative perspective, i. e., the data perspective, and propose a novel Boosted Contrastive Learning (BCL) method.

Contrastive Learning Memorization +2

Trade the Event: Corporate Events Detection for News-Based Event-Driven Trading

1 code implementation Findings (ACL) 2021 Zhihan Zhou, Liqian Ma, Han Liu

In this paper, we introduce an event-driven trading strategy that predicts stock movements by detecting corporate events from news articles.

Event Detection Event-Driven Trading +2

Few-Shot Sequence Labeling with Label Dependency Transfer and Pair-wise Embedding

no code implementations20 Jun 2019 Yutai Hou, Zhihan Zhou, Yijia Liu, Ning Wang, Wanxiang Che, Han Liu, Ting Liu

It calculates emission score with similarity based methods and obtains transition score with a specially designed transfer mechanism.

Few-Shot Learning named-entity-recognition +3

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