Beijing Institute of Technology

Classification-constrained retrieval of PM 2.5 vertical profiles from fluorescence-raman-mie polarization lidar

Abstract. The vertical distribution of PM2.5 during urban haze events is jointly affected by aerosol composition, boundary-layer structure, and regional transport. Empirical PM2.5 retrievals based on lidar-derived extinction coefficients can be biased by the optical contribution...

Damage-ignition mechanism of composite energetic materials with different densities under multi-pulse loading

Ignition of composite energetic materials (CEMs) may occur under multi-pulse loading, involving a complex interplay between damage and hotspot accumulation. The ignition mechanism is not clear due to the heterogeneous structure and complexity of the loading. In this study, multi-...

Recent Advances in Wearable Tactile Fiber Bragg Grating Sensors

With the advancement of wearable tactile technology, complex multi-site and multimodal sensing has become an inevitable trend [...]

Conformal Risk-Calibrated Latent World Models with Runtime Assurance Under Distribution Shift

Learning-enabled autonomous controllers may fail when a compact world model remains confident outside its training distribution. We present the conformal disagreement-regulated latent world model (CDR-LWM). The method converts ensemble disagreement into a risk-calibrated, state-d...

Programmable Temperature‐Capped Dressing for Enhanced Wound Healing, Bacterial Clearance, and Inflammatory Modulation

ABSTRACT Reconciling efficient bacterial eradication with tissue safety remains a challenge in photothermal therapy (PTT) because of open‐loop thermal actuation. Herein, we propose a detachable bilayer hydrogel dressing comprising a poly(N‐isopropylacrylamide) (PNIPAM)‐based prot...

A study analyzing factors retarding digital transformation and configuration pathways: Based on the perspective of digital transformation acceptors

The high-touch service nature of the hospitality industry highlights that the success of digital transformation depends primarily on human factors rather than technology itself. Existing research indicates that approximately 80% of strategic initiatives fail due to employee resis...

Bioreactor Optimisation Through Coupled Fluid–Structure Interaction and Data-Driven Analysis: A Biomimetic Framework for Predicting Early Cell Attachment

Early cell attachment sets the baseline for proliferation, matrix deposition and construct maturation in tissue engineering, yet conventional bioreactors deliver simplified, quasi-static stimuli that poorly represent the multi-axial mechanical environment of native tissue. Here w...

Circularly Polarized Light Amplifies Spin Polarization for Efficient Photoredox Chemistry in a Chiral Magnetic Catalyst

ABSTRACT Photocatalysis offers a promising route to sustainable energy, yet the role of carrier spin in charge transport and interfacial redox chemistry remains poorly understood. Chiral and magnetic catalysts selectively transmit spin‐compatible carriers, whereas non‐polarized l...

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...

Thermo‐Mechanical Fatigue, Crack Evolution, and Fracture Reliability of Lightweight High‐Power‐Density Diesel Pistons: A Review

ABSTRACT The higher power density and lightweight design of diesel pistons impose severe thermo‐mechanical demands. This review summarizes research on thermo‐mechanical fatigue, crack evolution, and fracture reliability in lightweight, high‐power‐density pistons. The review exami...

Coupling mechanism of internal polarization evolution and 3D thermal behavior in lithium-ion batteries under high-rate discharge

The spatial heterogeneity of multi-physics fields induced by high-rate discharge affects the safety performance of large-format lithium-ion batteries (LIBs). In this work, Quasi-4D electrochemical-thermal (ECT) coupled model is developed for lithium-ion battery to analyze the spa...

Axial Stress Measurement of Small Diameter Aluminum Alloy Tubes Using a Conformal Oblique Incidence-Guided Wave Probe

Quantitative evaluation of axial stress in small diameter thin-walled aircraft tubing is important for characterizing its mechanical state during assembly and service. However, restricted circumferential access necessitates a compact local excitation configuration, for which geom...

Distributed Online Self‐Tuning Event‐Triggered Adaptive Control With Parameter Uncertainties

ABSTRACT This article investigates an online self‐tuning event‐triggered distributed tracking control for heterogeneous multi‐agent systems (HMASs) with multiple parameter uncertainties, which is of great significance in addressing complex real‐world scenarios where system parame...

AGDE-Net: a lightweight attention-guided dual-encoder network for tumor core and peritumoral edema segmentation in adult glioma

Abstract Background Glioma is a malignant primary brain tumor arising from glial cells, often resulting in fatal outcomes without timely treatment. Accurate and reliable tumor segmentation is essential for clinical decision-making and therapeutic evaluation. This study aims to de...

Triple-Laser Synergistic Etching: An Effective Strategy for Contour Error Suppression in Diamond Cutting Tool Edges

Diamond tools hold a pivotal position in ultra-precision and micro-machining within the high-tech manufacturing sector, owing to their remarkable cutting performance. However, the manufacturing precision of these tools is often affected by their inherent anisotropy. This study pr...

Thermal-hydraulic performance of a composite-channel printed circuit heat exchanger precooler for supercritical CO2-based mixtures

Printed circuit heat exchanger (PCHE) precoolers operating with CO 2 -based mixtures and water exhibit asymmetric thermal-hydraulic requirements on the hot and cold sides. However, conventional PCHE precoolers often employ identical channel geometries on both sides, and the side-...

Interfacial Electric Fields in Water Nanodroplets Are Weakly Dependent on Curvature and pH

Abstract The origin of enhanced reactivity in aqueous microdroplets remains unresolved, with interfacial electric fields (IEFs) frequently proposed as catalytic drivers. Here, we present a quantum-mechanical, spatially resolved characterization of the electric field at air-water...

Dual‐Band Valley Hall Topological Photonic Crystal in the Terahertz Regime and Its Directional Radiation

ABSTRACT Valley‐Hall photonic crystals offer promising opportunities for topological wave routing, frequency‐selective manipulation, and directional radiation, yet most experimentally demonstrated terahertz (THz) systems operate within a single topological bandgap. Here, we propo...

Mode‐Selective C═C and C─N Vibrational Coupling Modulates Nonradiative Decay in Regioisomeric Organic Phosphorescent Emission

ABSTRACT Structural isomerization has emerged as an effective strategy for improving the performance of organic room‐temperature phosphorescent materials, but reported explanations are mainly attributed to differences in molecular packing, spin‐orbit coupling, excited‐state elect...

Lattice Boltzmann Modeling of Droplet Impact on a Superhydrophobic Ridge

ABSTRACT The impact dynamics of droplets on a single rectangular superhydrophobic ridge are systematically investigated using the lattice Boltzmann method. The effects of ridge width, droplet deviation, and Weber number on droplet deformation and breakup are examined through exte...