Tsinghua University

Temporal Variations in Runoff and Seasonal Climatic Associations in Selected Headwater Catchments of the Yangtze and Yellow Rivers

The source regions of the Yangtze and Yellow Rivers on the Tibetan Plateau provide vital water resources for downstream ecosystems and populations, yet their runoff responses to climate warming remain insufficiently understood. Based on daily runoff data from six hydrological sta...

Functional-Edged Network Modeling

We study a novel class of networks, referred to as functional-edged networks, where the weight of each edge is represented as a smooth function over time rather than a scalar or vector. To model such networks, we introduce a functional adjacency tensor that extends the convention...

Weakening Local Chemical Bonds for Enhanced Thermoelectric Performance in YbMg 2 Sb 2 Zintl Compounds

ABSTRACT Alloying is a well‐established strategy for reducing lattice thermal conductivity ( κ L ) and enhancing thermoelectric performance of materials, typically explained by the Klemens model, which describes the point‐defect phonon scattering via mass and size contrasts. Yet,...

Unpacking interaction profiles and strategies in human-AI collaborative problem solving: a cognitive distribution and regulation perspective

This study adopts an integrated distributed cognition and regulation of learning perspective to examine the collaboration patterns and dynamics of human-AI interaction when college students collaborate with AI for complex problem-solving. Through cluster analysis, three distinct...

Fast Breakdowns Observed in the Initial Leaders of Two Energetic Compact Strokes

Abstract We have observed 1 fast positive breakdown (FPB) and 20 fast negative breakdowns (FNBs) for the first time in the initial leader of two energetic compact strokes (ECSs) using a broadband interferometer. It was found that the FPB propagated upward over a distance of 30 m...

Multimodal fusion of complementary material representations for generalizable and interpretable property prediction

Material properties often depend on coupled compositional, structural, and geometric factors that are incompletely captured by any single representation. We introduce interpretable multimodal fusion (IM-Fuse), a framework that integrates compositional descriptors, crystal graphs,...

Stochastic Optimization of PV Non-Tripping Capacity in Distribution Networks Considering Uncertainties and Faults

Against the backdrop of the “dual-carbon” goals, the penetration of distributed photovoltaics (PV) in distribution networks continues to increase. Under the combined effects of stochastic PV generation and load variability, assessing PV hosting capacity in distribution networks u...

Influence of Water-to-Powder Ratio on the Frost Resistance of Tuff Powder-Modified Self-Compacting Concrete

Self-compacting concrete (SCC) shows considerable potential for infrastructure applications on the Qinghai–Tibet Plateau, which is characterized by a hypoxic environment. However, the quantitative effects of the volumetric water-to-powder ratio (VW/VP) on the freeze–thaw durabili...

Competition between root defects and non-uniform properties in governing the tensile deformation behavior of friction stir welds: a finite element analysis

Root defects and non-uniform material properties are two key factors governing the tensile deformation behaviors of friction stir welds, yet the competitive mechanism between these two factors remains unclear. In this study, we propose a finite element model that incorporates bot...

Hi-Cformer enables multiscale chromatin contact map modeling for single-cell Hi-C data analysis

Abstract Single-cell Hi-C captures the three-dimensional organization of chromatin in individual cells and provides insights into fundamental genomic processes such as gene regulation and transcription. While analyses of bulk Hi-C data have revealed multi-scale chromatin structur...

Multistate manipulation of charge-spin conversion in two-dimensional ferroelectric bilayers

Achieving nonvolatile and multistate manipulation of charge-spin conversion, including the Edelstein effect (EE) and spin Hall effect (SHE), is crucial for high-density spintronic memory. Here, we propose a mechanism to simultaneously control both EE and SHE in two-dimensional fe...

scProtoTransformer: Scalable reference mapping across molecules, cells, and donors

Abstract The rapid accumulation of single-cell data has made it possible to comprehensively characterize biological systems at molecular, cellular, and donor levels. However, scalable reference mapping across different resolutions remains a major challenge in current research. He...

A TSV-packaged SP6T RF MEMS switch with ultra-thin profile and suppressed substrate loss for DC to Ku band application

The evolution of wireless communication imposes stringent requirements on RF front-end modules, specifically demanding switches with ultra-thin profiles and wideband coverage up to Ku band. However, conventional packaged MEMS switches often result in excessive device height, crea...

Thermal cycling–induced nitriding increases energy-storage density in titanate ferroelectric films

Enhancing dielectric energy-storage density ( U e ) requires maximizing the difference between maximum and remanent polarizations (Δ P ). Improving Δ P remains fundamentally challenging, as existing strategies rarely achieve simultaneous high maximum polarization and low remanent...

Comparative effectiveness of dietary supplements in dilated cardiomyopathy: a systematic review and network meta-analysis

Abstract Background Dilated cardiomyopathy (DCM) is a major cause of heart failure and cardiovascular mortality, partly due to impaired myocardial energy metabolism. Dietary supplements may offer benefits through improved mitochondrial function and antioxidant effects, and random...

From Sensing Mechanisms to System Co‐Design: Graphene‐Based Sensors and Readout Circuits

ABSTRACT Graphene‐based materials combining outstanding electrical, thermal, optical and mechanical properties have demonstrated remarkable potential for high‐performance sensing across optoelectronic, molecular, mechanical, magnetic and thermal applications. However, practical g...

Perceived overqualification and work-family conflict: examining work-family centrality as a moderator

The relationship between perceived overqualification and work-family conflict (WFC) is unclear. We argue that the extent to which it is either positive or negative depends on work-family centrality. Overqualified employees who prioritize work more than their families will apprais...

A Ballot-Word Formula for q-Zeta Numerators of Type-B Root Posets

We determine the Chapoton q-Zeta numerator for the full positive-root poset of standard Lie type B_r, graded by root height minus one and normalized with Chapoton's fixed denominator convention. For every standard Lie rank r >= 1, we identify the root poset with a trapezoidal cel...

Current-Step-Based Fast Electrochemical Parameter Identification for PEMWE Using a Physics-Informed Neural Network

Electrochemical parameter identification is crucial for evaluating the electrochemical processes in proton exchange membrane water electrolysis (PEMWE). Conventional characterization techniques-including polarization-curve fitting, electrochemical impedance spectroscopy (EIS), cy...

Biomedical Materials and Fabrication Methods for Construction of In Vitro Neurovascular Unit Models

In vitro neurovascular unit (NVU) models are essential for reproducing blood–brain barrier (BBB) transport and neurovascular cell interactions. However, the literature remains fragmented: biomaterial chemistry, fabrication parameters and organ-on-a-chip architecture are commonly...