Publications (29)
ConFL: Constraint-guided Fuzzing for Machine Learning Framework
Zhao Liu, Quanchen Zou, Tian Yu +4
As machine learning gains prominence in various sectors of society for automated decision-making, concerns have risen regarding potential vulnerabilities in machine learning (ML) f…
Bistability and equilibria of creased annular sheets and strips
Tian Yu
A creased thin disk is generally bistable since the crease could be pushed through to form a stable cone-like inverted state with an elastic singularity corresponding to the vertex…
DECADE: A Temporally-Consistent Unsupervised Diffusion Model for Enhanced Rb-82 Dynamic Cardiac PET Image Denoising
Yinchi Zhou, Liang Guo, Huidong Xie +14
Rb-82 dynamic cardiac PET imaging is widely used for the clinical diagnosis of coronary artery disease (CAD), but its short half-life results in high noise levels that degrade dyna…
Truth-Aware Context Selection: Mitigating Hallucinations of Large Language Models Being Misled by Untruthful Contexts
Tian Yu, Shaolei Zhang, Yang Feng
Although Large Language Models (LLMs) have demonstrated impressive text generation capabilities, they are easily misled by untruthful contexts provided by users or knowledge augmen…
TruthX: Alleviating Hallucinations by Editing Large Language Models in Truthful Space
Shaolei Zhang, Tian Yu, Yang Feng
Large Language Models (LLMs) sometimes suffer from producing hallucinations, especially LLMs may generate untruthful responses despite knowing the correct knowledge. Activating the…
Exact and approximate mechanisms for pure bending of sheets
Tian Yu, J. A. Hanna
Direct measurement of the moment-curvature response of sheets or wires up to high curvatures can aid in modeling creasing, pleating, and other forming operations. We consider theor…
Geometry and Mechanics of Non-Euclidean Curved-Crease Origami
Zhixuan Wen, Tian Yu, Fan Feng
Recently there have been extensive theoretical, numerical and experimental works on curved-fold origami. However, we notice that a unified and complete geometric framework for desc…
Overcurvature induced multistability of linked conical frusta: How a `bendy straw' holds its shape
Nakul P. Bende, Tian Yu, Nicholas A. Corbin +4
We study the origins of multiple mechanically stable states exhibited by an elastic shell comprising multiple conical frusta, a geometry common to reconfigurable corrugated structu…
Reinforcement Learning Based User-Guided Motion Planning for Human-Robot Collaboration
Tian Yu, Qing Chang
Robots are good at performing repetitive tasks in modern manufacturing industries. However, robot motions are mostly planned and preprogrammed with a notable lack of adaptivity to…
Mastering the working sequence in human-robot collaborative assembly based on reinforcement learning
Tian Yu, Jing Huang, Qing Chang
A long-standing goal of the Human-Robot Collaboration (HRC) in manufacturing systems is to increase the collaborative working efficiency. In line with the trend of Industry 4.0 to…
Dynamics of Taylor Rising
Tian Yu, Ying Jiang, Jiajia Zhou +1
We study the dynamics of liquid climbing in a narrow and tilting corner, inspired by recent work on liquid transportation on the peristome surface of Nepenthes alata. Considering t…
Exploiting dynamic bifurcation in elastic ribbons for mode skipping and selection
Weicheng Huang, Tian Yu, Dominic Vella +2
In this paper, we systematically study the dynamic snap-through behavior of a pre-deformed elastic ribbon by combining theoretical analysis, discrete numerical simulations, and exp…
BioFact-MoE: Biologically Factorized Mixture of Experts for Vision-Language Prognostic Modeling in Hepatocellular Carcinoma
Junlin Yang, Tian Yu, Nicha C. Dvornek +6
Hepatocellular carcinoma (HCC) is biologically heterogeneous, shaped by the interplay between hepatic functional reserve and tumor-related oncologic factors; thus, similar survival…
Wetting equilibrium in a rectangular channel
Tian Yu, Qicheng Sun, Chen Zhao +2
When a capillary channel with corners is wetted by a fluid, there are regions where the fluid fills the whole cross-section and regions where only the corners are filled by the flu…
Double-eigenvalue bifurcation and multistability in serpentine strips with tunable buckling behaviors
Qiyao Shi, Weicheng Huang, Tian Yu +1
Serpentine structures, composed of straight and circular strips, have garnered significant attention as potential designs for flexible electronics due to their remarkable stretchab…
Edge Deep Learning Enabled Freezing of Gait Detection in Parkinson's Patients
Ourong Lin, Tian Yu, Yuhan Hou +2
This paper presents the design of a wireless sensor network for detecting and alerting the freezing of gait (FoG) symptoms in patients with Parkinson's disease. Three sensor nodes,…
Numerical modeling of static equilibria and bifurcations in bigons and bigon rings
Tian Yu, Lauren Dreier, Francesco Marmo +3
In this study, we explore the mechanics of a bigon and a bigon ring from a combination of experiments and numerical simulations. A bigon is a simple elastic network consisting of t…
ATime-Consistent Benchmark for Repository-Level Software Engineering Evaluation
Xianpeng, Sun, Haonan Sun +5
Evaluation of repository-aware software engineering systems is often confounded by synthetic task design, prompt leakage, and temporal contamination between repository knowledge an…
UniSync: Towards Generalizable and High-Fidelity Lip Synchronization for Challenging Scenarios
Ruidi Fan, Yang Zhou, Siyuan Wang +3
Lip synchronization aims to generate realistic talking videos that match given audio, which is essential for high-quality video dubbing. However, current methods have fundamental d…
Auto-RAG: Autonomous Retrieval-Augmented Generation for Large Language Models
Tian Yu, Shaolei Zhang, Yang Feng
Iterative retrieval refers to the process in which the model continuously queries the retriever during generation to enhance the relevance of the retrieved knowledge, thereby impro…
Wetting dynamics in an angular channel
Chen Zhao, Tian Yu, Jiajia Zhou +1
We analyze the dynamics of liquid filling in a thin, slightly inflated rectangular channel driven by capillary forces. We show that although the amount of liquid in the channel…
Avoiding localization instabilities in rotary pleating
Tian Yu, J. A. Hanna
Rotary pleating is a widely used process for making filters out of nonwoven fabric sheets. This involves indirect elastic-plastic bending of pre-weakened creases by continuously in…
Tractography with T1-weighted MRI and associated anatomical constraints on clinical quality diffusion MRI
Tian Yu, Yunhe Li, Michael E. Kim +8
Diffusion MRI (dMRI) streamline tractography, the gold standard for in vivo estimation of brain white matter (WM) pathways, has long been considered indicative of macroscopic relat…
Polar State in Freestanding Strontium Titanate Nanoparticles
Trevor A. Tyson, Tian Yu, Mark Croft +6
Monodispersed strontium titanate nanoparticles were prepared and studied in detail. It is found that ~10 nm as-prepared stoichiometric nanoparticles are in a polar structural state…
Capillary imbibition in a square tube
Tian Yu, Jiajia Zhou, Masao Doi
When a square tube is brought in contact with bulk liquid, the liquid wets the corners of the tube, and creates finger-like wetted region. The wetting of the liquid then takes plac…
Bifurcations of buckled, clamped anisotropic rods and thin bands under lateral end translations
Tian Yu, J. A. Hanna
Motivated by observations of snap-through phenomena in buckled elastic strips subject to clamping and lateral end translations, we experimentally explore the multi-stability and bi…
Multi-Agent Synergy-Driven Iterative Visual Narrative Synthesis
Wang Xi, Quan Shi, Tian Yu +5
Automated generation of high-quality media presentations is challenging, requiring robust content extraction, narrative planning, visual design, and overall quality optimization. E…
Hybrid Robot Learning for Automatic Robot Motion Planning in Manufacturing
Siddharth Singh, Tian Yu, Qing Chang +2
Industrial robots are widely used in diverse manufacturing environments. Nonetheless, how to enable robots to automatically plan trajectories for changing tasks presents a consider…
Continuous modeling of creased annuli with tunable bistable and looping behaviors
Tian Yu, Francesco Marmo, Pasquale Cesarano +1
Creases are purposely introduced to thin structures for designing deployable origami, artistic geometries, and functional structures with tunable nonlinear mechanics. Modeling the…