Tsinghua University

Static and dynamic seal performances of axial force self-balancing devices

:Excessive axial force poses a critical challenge to the operational stability and reliability of turbomachinery, necessitating effective axial force balancing strategies. This study proposes a comprehensive methodology for the performance-oriented design and optimization of axia...

Initial Experimental Demonstration of Microwave Imaging for Mapping Leakage-Induced Subsurface Anomalies

The detection and spatial assessment of buried water pipeline leaks are critical for preventing resource loss and geohazards such as soil erosion and subsidence. This paper presents an initial experimental demonstration of a microwave imaging system designed for mapping subsurfac...

Sustainable solar water purification: Exploring the structural advantages of higher plants

Solar vapor generation is a promising technique for water purification, although the development of efficient and sustainable systems for practical use remains challenging. Here, we introduce a higher plant–derived evaporator, leveraging the structural advantages of plants and th...

Zero-Shot and Few-Shot Hydrogen Demand Forecasting with Time Series Foundation Models

Accurate hydrogen demand forecasting is essential for optimizing infrastructure investments in the emerging hydrogen economy, yet the scarcity of historical consumption data poses a fundamental challenge for conventional time series methods. We present a systematic evaluation of...

3D Microfluidic Networks Formed by Mechanically Guided Compressive Buckling for Large‐Scale Perfused Tissue Culture

ABSTRACT Engineered tissues and organoids offer transformative potential for drug screening and regenerative medicine, yet their application is constrained by limited size and slow maturation. Despite the development of various channel networks for large‐scale engineered tissue p...

Enhanced Acoustic Adhesion Enabling Agile and Small Wall‐Climbing Robot Design With Anisotropic Origami Structure

ABSTRACT Small inspection robots are highly desirable for detecting damage within confined spaces. By vibrating a disk on a surface, a thin air layer with negative pressure—known as acoustic adhesion—is generated, which offers a strategy for creating compact yet strongly climbing...

Towards a structure-aware multi-hop retrieval framework for large language model reasoning over complex oncology guidelines

Large language models (LLMs) augmented with clinical guidelines show promise in medical question answering, yet structural parsing and evidence retrieval over complex guidelines remain challenging. We propose SMART-RAG (Structure-aware Multi-hop Augmented Retrieval Technique for...

Topology-aware dynamic co-evolution for robust graph learning

Graph Neural Networks (GNNs) have achieved remarkable success in learning from graph-structured data. However, recent studies have revealed their vulnerability to adversarial attacks, where imperceptible perturbations to the graph structure can easily mislead predictions. Existin...

Orthogonal Fc engineering enables multiplexed delivery of mRNA-encoded bispecific antibodies that constrain viral escape

The continuous antigenic evolution of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has repeatedly undermined the effectiveness of monoclonal antibody (mAb) therapies, underscoring the need for innovative approaches that improve therapeutic mAb breadth and durabili...

Boundedness of polarized log Calabi–Yau fibrations with bounded bases

We investigate the boundedness problem for log Calabi–Yau fibrations whose bases and general fibers are bounded. We prove that the total spaces of log Calabi–Yau fibrations are bounded in codimension one after fixing some natural invariants, which confirms a conjecture of Birkar...

Attachment-line turbulent boundary layer over a swept leading edge at Mach 6: Simulation and flow physics

Direct numerical simulations (DNS) are performed to investigate the spatial evolution of a three-dimensional (3-D) turbulent boundary layer over a swept blunt leading edge at freestream Mach number upper M Subscript normal infinity Baseline equals 6.0 M ∞ = 6.0 $M_\infty =6.0$ an...

Oxygen Plasma-Activated PES Ultrafiltration Substrates for Constructing High-Performance Mg2+/Li + Separation Nanofiltration Membranes

Abstract Positively charged polyamide (PA) nanofiltration (NF) membranes hold great potential for Mg2+/Li+ separation, but their performance is strongly affected by the surface properties and pore structures of the substrate. In this study, a PES ultrafiltration substrate was pre...

Density Estimation via Periodic Scaled Korobov Kernel Method with Exponential Decay Condition

Abstract. We propose the periodic scaled Korobov kernel (PSKK) method for nonparametric density estimation on [Formula: see text]. By first wrapping the target density into a periodic version through modulo operation and subsequently applying kernel ridge regression in scaled Kor...

Holographic multipartite entanglement dynamics in AdS3-Vaidya

A bstract We study how multipartite entanglement is dynamically reorganized during holographic thermalization following a global quench in AdS 3 /CFT 2 . We first use the n -partite information (− 1) n I n to probe collective multipartite entanglement in holographic configuration...

Connectivity‐Dependent Mechanics of Main‐Chain Oligomers in Side‐Chain Liquid‐Crystalline Polyacrylate Networks

ABSTRACT Liquid‐crystalline elastomers (LCEs) combine orientational order with polymer‐network elasticity, yet the influence of molecular connectivity on their mechanics across different timescales remains poorly understood. Side‐chain polyacrylate LCEs containing main‐chain liqu...

Cross-scale mechanistic investigation of multistage carbon dioxide pool flash evaporation with vertical heterogeneity

Pool flash evaporation is a canonical liquid–vapor phase-change process driven by rapid depressurization, yet the stage-dependent flow-pattern evolution and vertical thermodynamic heterogeneity remain poorly understood. Existing heat and mass transfer models treat the process as...

Pólya's inequality for three-dimensional spherical shells and balls with small spherical holes

This record contains the full author preprint and computational supplementary material for “Pólya's inequality for three-dimensional spherical shells and balls with small spherical holes”. The paper proves the Dirichlet Pólya inequality for every concentric spherical shell in thr...

Path integral quantization of null bosonic strings with Carroll-Weyl ghosts

A bstract We revisit the path integral quantization of the null bosonic string from the viewpoint that all local gauge symmetries of the Carrollian worldsheet must be gauge fixed before the quantum theory is defined. In the tensile-string construction the bc ghosts are the Faddee...

Thermal conductivity and temperature-induced bandgap renormalization in crystalline and amorphous Ga2O3

The lattice thermal conductivity (LTC) and electron–phonon interactions in crystalline and amorphous gallium oxide are herein determined by coupling a machine-learned interatomic potential, namely the moment tensor potential model, to first-principles calculations. Crystalline β-...

Optimizing Sequential Competitive Facility Location and Attractiveness Design

We consider a sequential competitive facility location and attractiveness design problem (S-CFLAP) in which the leader and follower sequentially decide on the location and attractiveness design (e.g., building area) of new facilities to maximize their market shares. Customer dema...