Beijing Institute of Technology

Aging-induced pressure characteristics and state-of-health estimation for large-format LFP batteries under multi-constraint operating conditions

Battery pressure is a critical indicator for battery state-of-health (SOH). In this work, long-term aging tests are conducted on large-format prismatic lithium-iron-phosphate (LFP) energy-storage cells via a custom-built multi-constraint test platform. Aging experiments under var...

Scriptless cross-chain deferred asset transfer for AIoT

In AIoT service scenarios such as sensing-as-a-service and edge AI outsourcing, a service requester may need to establish a payment commitment before service execution, while final transaction should be deferred until service delivery is verified. When the requester and the provi...

Dynamics and coordination of water and carbon footprints in China, 2007–2023: drivers and supply-chain pathways

Coordinated water and carbon management requires identifying not only whether the two environmental pressures change in the same direction, but also which socioeconomic drivers and supply-chain pathways generate co-benefits or trade-offs. Existing studies rarely integrate tempora...

Adaptive Output Tracking Control System Design With SPR‐Based Adaptive PFC

ABSTRACT Adaptive output feedback control based on an Almost Strictly Positive Real (ASPR) condition has been developed. In the control method based on the ASPR condition, its distinct feature is that an ASPR system can be stabilized by merely applying static output‐feedback cont...

Solving Deadlock Problem for Consensus‐Based Bundle Algorithm in Distributed Systems With Practical Fuel Consumption Evaluation

ABSTRACT This paper proposes the Deadlock‐Free Consensus‐Based Bundle Algorithm (DF‐CBBA) to address deadlock in distributed multi‐agent task allocation problems with practical fuel consumption evaluation. A more practical optimization problem, which intentionally violates the Di...

Investigation of transient emission control strategies for a turbocharged direct-injection hydrogen engine

Hydrogen internal combustion engines (H 2 ICEs) have been demonstrated to achieve high efficiency and near-zero NO x emissions under stable lean-burn operation. However, the low exhaust enthalpy slows turbocharger response, while rapid load increases can cause λ deterioration and...

Multi-objective optimization of skirt profile for air-cooled pistons based on adaptive ensemble multi-kernel Kriging and an improved hybrid WOA-DE algorithm

Operating under severe thermo-mechanical coupled loads, air-cooled diesel engine pistons are highly susceptible to secondary motion instability, piston slap, and exacerbated friction. To address this multi-objective performance trade-off, this study investigates a representative...

Stabilizing Pt by Introducing TaON to Enhance the Long-Term Stability in Zinc-Air Batteries

Abstract For many years, the application of zinc-air batteries (ZABs) has been plagued by the limited durability of platinum (Pt)-based catalysts. Here, we overcome this problem by adopting an intelligent catalyst design, introducing tantalum (oxy)nitrides (TaON) as a carrier to...

Fluorine‐Driven Interfacial Reconfiguration for pH‐Universal CO 2 Electrolysis at High Current Densities via Enhanced CO 2 Enrichment and Proton Feeding

ABSTRACT High‐rate CO 2 electroreduction is challenged by the conflict between sluggish CO 2 activation and hydrogen evolution at high currents, particularly under pH‐universal and dilute CO 2 conditions. In this study, a defective fluorine‐modified bismuth (F‐Bi) with electron‐r...

Sub-10-nm stacking bands enable ultrastrong additively manufactured titanium

Lightweight alloys with superior strength–ductility synergies are crucial for advanced structural applications, and nanostructured titanium (Ti) alloys are promising candidates. However, it remains challenging to manufacture bulk components with complex geometries as well as pres...

Fluorescent Molecular Scaffold-Building Mononuclear Iron(II) Complexes Display Synergistic Spin Crossover and Fluorescence Behaviors

Abstract Magnetic fluorescent bifunctional spin crossover (SCO) materials show switchable magnetic and optical properties and have attracted continuous research interest due to their potential application in magneto-optical switches and multi-sensors. Herein, we report two octahe...

V-Shaped {Cu8}-Added Polyoxometalate for Visible-Light-Driven Hydrogen Evolution and Photothermal Conversion

Abstract A {Cu8}-added polyoxometalate (Cu8AP), H3Cs13[CuB(OH)3(GeW6O26)Cu8(H2O)2(GeW9O34)2]·2Cl·15H2O (1), was synthesized via the lacunary directing synthetic strategy. Visible-light-driven photocatalytic H2 evolution performance revealed an exceptional evolution rate of 12632....

A Verifiable Momentum Federated Learning Scheme

Momentum federated learning (MFL) has attracted widespread attention in privacy-preserving data mining. However, an adversary may engage in two malicious behaviors: (1) launching gradient inversion attacks on momentum information to reconstruct training samples, and (2) tampering...

Ab Initio Chemical Kinetics of Radical–Radical Reaction of CH3O with NO2

Abstract This work theoretically investigated the ab initio chemical kinetics of the radical–radical reaction between the methoxy (CH3O) and nitrogen dioxide (NO2), which represents a key C–N interaction in ammonia/hydrocarbon cocombustion. The stationary-point energies were dete...

Euler–Maruyama scheme for α-stable SDE with distributional drift

In this paper, we consider a class of stochastic differential equations driven by symmetric non-degenerate α -stable processes (including cylindrical ones) with 𝛼 ∈ ( 1 , 2 ) . We first establish a quantitative estimate for the Euler scheme under smooth bounded drift 𝑏 ⁡ ( 𝑥 ) ,...

Redox Decoupling Modulates Multi‐Electron Reaction in Mn‐Rich NASICON Cathode for High‐Energy Sodium‐Ion Batteries

ABSTRACT Coupled redox reactions caused by voltage hysteresis limit the application of Mn‐rich NASICON cathodes for sodium‐ion batteries. Herein, this work fabricates a Na 3.6 Mn 1.25 Ti 0.7 Ni 0.05 (PO 4 ) 3 (NM1.25TP‐Ni) cathode material achieving redox decoupling of Mn/Ti. Spe...

Multibody dynamic characteristics of a co-rotating scroll hydrogen recirculation pump

Co-rotating scroll hydrogen recirculation pump (CSHRP) for hydrogen fuel cell-powered vehicles is characterized by compactness, high efficiency, and low noise, which have brought it into the spotlight. However, the dynamics of the CSHRP in multi-clearance coupling conditions are...

Three-dimensional laser micro/nano printing for optical computing

Abstract With the rapid growth of data-intensive computing, optical computing has become an important method for information processing with high bandwidth, low latency, and parallel operation. Early implementations were bench-top free-space systems, in which lenses, masks, and h...

Growth and electrical transport property studies of Bi2Se3 thin films with Cr or MnPc surface magnetic modification

The Bi2Se3 family is widely regarded as the prototypical three-dimensional topological insulator, which is an ideal platform for investigating topological quantum phenomena such as the quantum anomalous Hall effect and Majorana fermions. Further application requires high-quality...

Towards a Balance between Functionality and Stability: Energy‐Safety Synergistic Mechanisms and Prospects in Perovskite Energetic Materials

self-assembly structure. Their core advantage lies in the ability to precisely control energy levels and safety through molecular-level design. However, the inherent contradiction between high energy and high safety is a key bottleneck restricting their development. This article...