Northeastern University

Adaptive Integral Sliding-Mode Control for UAV Hovering with Conditional Anti-Saturation

This paper develops conditional anti-saturation integral sliding-mode control for quadrotor hovering subject to bounded generalized control authority, external disturbances, and model uncertainties. A state-dependent Boolean mechanism conditionally modifies the bounded restoring...

A defect and multi-physics informed neural network for fatigue life prediction in friction stir welded additive manufacturing AlSi7Mg

Additively manufactured aluminium alloys joined by friction stir welding exhibit great potential for large-scale structural applications, yet their fatigue life prediction remains challenging due to the complex influence of internal defects and process-induced microstructural het...

Investigating high-temperature wear behavior and mechanism of (TiC+TiB+La2O3)/TC4 composites via finite element simulation and experiments

A pin-on-disk friction model was proposed based on the Archard theory, incorporating the arbitrary Lagrangian-Eulerian (ALE) remeshing technique and the Umeshmotion subroutine in Abaqus software. The model simulated the friction process between (TiC+TiB+La 2 O 3 )/TC4 composites...

Robust Fault and Disturbance Reconstruction for Continuous-Time Markovian Jump Systems

This paper presents the robust actuator fault and disturbance reconstruction scheme for a kind of continuous-time Markovian jump systems (MJSs). A novel observer with the output derivative signal is proposed to realize the estimation for system states, actuator faults and disturb...

LOAD: Enabling Low-Bit Group Quantization for Vision Transformers via Adaptive Data Formats

Vision Transformers (ViTs) achieve state-of-the-art performance across various vision tasks but pose significant deployment challenges due to their high computational complexity and memory footprint. Post-training quantization (PTQ) offers an efficient, retraining-free compressio...

The Electric Car-Sharing Relocation and Recharging Problem Considering Route Balancing

One-way station-based electric car-sharing systems frequently develop spatial stock imbalances and charging shortfalls. Although operator staff are the primary corrective mechanism to relocate surplus electric cars (ECs) and ferry low-energy ECs to charger-equipped stations, most...

Event-Weighted Desaturation Burden and Cardiovascular Mortality in Sleep Apnoea: Findings from a Large Community-Based Prospective Cohort

BACKGROUND AND AIMS: Obstructive sleep apnoea's prognostic value is limited by reliance on the apnoea-hypopnoea index (AHI), which fails to capture physiological heterogeneity of respiratory events. We developed a composite metric, event-weighted desaturation burden (EWDB), integ...

scGEN: Leveraging an Adaptive Weighting Strategy for Challenging Cell Clustering in Single‐Cell RNA‐seq

ABSTRACT Recent advancements in single‐cell RNA sequencing (scRNA‐seq) have greatly enhanced our ability to dissect cellular heterogeneity. However, unsupervised clustering often struggles to identify transitional or developmental boundary cells, as existing methods rely on highl...

Experimental and numerical investigation of dendrite fragmentation, solute concentration, and channel formation in a transparent NH4Cl-70.43%H2O solution

Understanding and predicting the effect of hot melt flow on solidification structure is critical for enhancing the homogeneity of both the structure and elemental distribution. This study developed a mixed columnar-equiaxed solidification model that incorporates a mechanism for c...

Hot Deformation Behavior and Microstructural Evolution of a 5Mn Medium‐Mn Steel: Strain‐Compensated Arrhenius Modeling and DMM Processing Maps

Isothermal hot‐compression tests (850–1150 °C, 0.1–10 s −1 ) were performed on a 5Mn medium‐Mn steel to elucidate its high‐temperature flow behavior and microstructural evolution. Flow stress decreases with increasing temperature and increases with strain rate. Dynamic recovery (...

Characterizing concrete lining damage in underground high-pressure hydrogen storage lined rock caverns with validated numerical models

Large-scale underground high-pressure hydrogen storage is critical for low-carbon energy transition, while lined rock caverns (LRCs) are the core infrastructure for high-pressure hydrogen and compressed air energy storage. Severe tensile damage of concrete lining under 10–20 MPa...

Ultrafast Solid‐State Synthesis of Chevrel Phases for Microstructure‐Enabled Thermoelectric Transport Optimization

ABSTRACT Chevrel phases are promising medium‐ to high‐temperature thermoelectrics owing to their structural stability and intrinsically low lattice thermal conductivity, yet prolonged high‐temperature synthesis causes grain coarsening and limits microstructural control. Here, we...

Renewable Energy Output Uncertainty and Risk Transmission in Sustainable Power Supply Chains

Uncertainty in renewable energy output changes how risk is allocated among generators and electricity retailers. We develop a mean–variance model with a thermal plant, a green plant, and a retailer under retailer-led Stackelberg and generation-side Cournot arrangements. In the St...

The choice of product strategy and marketing strategy for serial crowdfunders

Purpose Serial crowdfunding is a common phenomenon, and serial crowdfunders face multiple decisions. Most crowdfunding platforms implement one-time payments, while some platforms implement deferred payments. This paper explores the product and marketing strategies of serial crowd...

Corrosion Behavior of Two Gd Particle-Doped Fe-Based Amorphous Coatings with Excellent Neutron Absorption Performance

Safe long-term storage of spent nuclear fuel requires materials that combine high neutron absorption with excellent corrosion resistance. In this study, two Gd-doped Fe-based amorphous coatings (2X5 + Gd and PC + Gd) containing 6.0 wt.% Gd were fabricated by high-velocity air–fue...

Recent advances in low-cobalt substrate-based cobalt blue composite pigments: Structural engineering, sustainable synthesis, and multifunctional applications

Cobalt blue (CoAl 2 O 4 ) is a spinel-structured inorganic pigment characterized by high chemical and thermal stability. However, its broader industrial application is constrained primarily by the high cost and supply volatility of cobalt and by the energy demand of conventional...

Hierarchical Distributed Data‐Driven Resilient Control of Hybrid‐Order MASs With Communication Link Faults

ABSTRACT The leader‐following consensus problem is studied in this article for heterogeneous hybrid‐order multi‐agent systems (MASs) subject to communication link faults. Unlike most existing studies focusing on MASs with identical‐order dynamics, this article considers the heter...

Orbital Coupling‐Induced Quasi‐Covalent Interaction in Nd‐Doped L1 2 ‐Pt 3 Co Intermetallic Catalysts for Durable Fuel Cells

ABSTRACT Platinum remains the benchmark catalyst for proton exchange membrane fuel cells, but its long‐term durability and tolerance toward CO impurities are still insufficient for demanding practical operation. Here, we propose a novel perspective to address the degradation and...

Microstructure and mechanical properties of fine-grained K417 superalloy ring fabricated by vacuum centrifugal casting

The K417 superalloy rings are extensively applied in the aerospace field for its excellent high-temperature strength and outstanding high-temperature creep resistance. However, conventional manufacturing routes face challenges in complex processing procedures and low material uti...

Gaze and Facial Expression‐Based Multimodal Network for Depression Assessment in Young Adults

ABSTRACT Depression remains a critical mental health challenge worldwide, particularly among young adults. Traditional assessment methods often raise privacy concerns and can heighten psychological resistance. To overcome these barriers, we introduce the Gaze and Facial Expressio...