Zhi Liu

The SYSU System for the Interspeech 2015 Automatic Speaker Verification Spoofing and Countermeasures Challenge

2015 · arXiv (Cornell University)

Many existing speaker verification systems are reported to be vulnerable against different spoofing attacks, for example speaker-adapted speech synthesis, voice conversion, play back, etc. In order to detect these spoofed speech signals as a countermeasure, …

On Sampling Top-K Recommendation Evaluation

2020

Recently, Rendle has warned that the use of sampling-based top-k metrics might not suffice. This throws a number of recent studies on deep learning-based recommendation algorithms, and classic non-deep-learning algorithms using such a metric, into …

Blockchain-based Secure Outsourcing Data Integrity Auditing for Internet of Things in Cloud-edge Environment

2022

Internet of Things enables devices to communicate, collect and exchange data with the network. As the number of IoT devices keeps growing, the volume of data they produce is also increasing exponentially. Given the feature …

RingSFL: An Adaptive Split Federated Learning Towards Taming Client Heterogeneity

2023 · IEEE Transactions on Mobile Computing

Federated learning (FL) has gained increasing attention due to its ability to collaboratively train while protecting client data privacy. However, vanilla FL cannot adapt to client heterogeneity, leading to a degradation in training efficiency due …

From Rational Answers to Emotional Resonance: The Role of Controllable Emotion Generation in Language Models

2025 · arXiv (Cornell University)

Purpose: Emotion is a fundamental component of human communication, shaping understanding, trust, and engagement across domains such as education, healthcare, and mental health. While large language models (LLMs) exhibit strong reasoning and knowledge generation capabilities, …

Stabilization and Uniformity of Controllability of Switched Linear Systems with Unstable Subsystems

2025

In this paper, the stabilization problem of switched linear time-varying systems with unstable subsystems is studied. Firstly, the condition of uniformity of controllability for all subsystems is introduced, under which the subsystems are exponentially stable …

Predicting higher education students' continued intention and self-reported use of generative AI tools in academic work: An extended UTAUT mixed-methods study

2026 · Acta Psychologica

This study investigated the factors shaping Chinese higher education students' continued intention and self-reported use of generative artificial intelligence (GenAI) tools in academic work. Drawing on an extended Unified Theory of Acceptance and Use of …