North China Electric Power University

Study on the deformation pattern of prismatic lithium-ion battery casings under different state-of-charge

To elucidate the deformation characteristics of prismatic lithium-ion battery casings under various charging conditions, this study designed a spring-clip-based deformation measurement fixture and conducted a series of measurements in conjunction with surface strain analysis. The...

Numerical calculation and experimental study on the influence of multiple factors on heat transfer characteristics of spherical bed heat storage reactor filled

This study proposes a solar thermal-phase change heat storage packed bed system to address heating demand and centralized heating limitations in extremely cold and arid regions. A spherical-bed experimental setup and a validated 3D numerical model were used to test heat storage a...

4D printed shape memory alloy metamaterial with tunable energy absorption and vibration isolation

The harmonious integration of energy absorption and vibration isolation strategies in metamaterial design is demonstrated to significantly enhance performance efficiency under complex dynamic loads. A novel metamaterial featuring tunable shape along with controllable energy absor...

Comprehensive study of cosmogenic neutron production in large liquid scintillator detectors

Abstract Neutrons produced by cosmic ray muons constitute a significant background for underground experiments investigating neutron oscillations, neutrinoless double beta decay, dark matter, and other rare event signals. This work benchmarks measured neutron yields and neutron m...

Fully distributed security control for wind farms subject to hybrid cyberattacks

Modern wind farms (WFs) increasingly integrate information technologies with wind power generation, which introduces new cyber-physical vulnerabilities. As the penetration of wind power in power systems continues to increase, secure communication and stable operation of WFs becom...

Near-optimal loop opening with a rotary power flow controller: Global-optimality conditions, certified domains, and practical-band fragmentation

Opening an RPFC-supported loop without a fresh voltage disturbance hinges on how the controller withdraws to zero injection. Field practice uses a two-step rule—suppress the injection magnitude, then reset the residual angle—yet no path-level theory explains when this rule is opt...

Windmill‐Type π ‐Extension Within Donor Moiety of Covalent Organic Framework Boosts Overall Photocatalytic Hydrogen Peroxide Production

ABSTRACT Covalent organic framework (COF)‐based catalysts are promising for overall photocatalytic hydrogen peroxide (H 2 O 2 ) production, yet the sluggish kinetics of water oxidation reaction (WOR) and inefficient charge carrier processes limit the catalytic performance. Herein...

Deep learning radiomics based on preoperative multiparametric MRI in predicting breast cancer recurrence risk

Breast cancer treatments are often tailored to recurrence risk to improve outcomes, but reliable risk stratification methods are lacking. To predict preoperative breast cancer recurrence risk through a tridimensional synergy model integrating breast MRI, radiomics, and deep learn...

Antisolvent Engineering Enabled Stretchable and Transparent Thermogalvanic Hydrogels with High Thermoelectric Properties

ABSTRACT Ionic thermogalvanic hydrogels with high ionic thermopower are promising for wearable power supply. However, due to the presence of solid network, their ionic conductivities are still low, limiting their power densities. Herein, a facile and effective enhancement strateg...

Fused Triphenylamine‐Terminated Self‐Assembled Hole‐Transporting Monolayers for Perovskite Solar Cells

ABSTRACT Conventional self‐assembled hole‐transporting monolayers (SAMs) in perovskite solar cells (PSCs) suffer molecular aggregation, uneven coverage on rough FTO substrates, and insufficient interfacial defect passivation. The design and application of novel SAMs have become a...

Self-Sustaining Ce(IV)/Ce(III) Cycle for Spontaneous Surface Hydroxyl Radical Generation

Abstract Advanced oxidation processes are indispensable for water remediation yet face a fundamental activity–selectivity trade-off, where reactive species are competitively quenched by complex aqueous matrices. While surface-confined chemistry, specifically utilizing surface-ads...

Decentralized power allocation with integrated bus voltage recovery for hybrid energy storage systems

Abstract A hybrid energy storage system (HESS) plays a crucial role in stabilizing DC microgrids against power fluctuations from renewable sources and loads. To mitigate severe bus voltage deviations under complex disturbances, this paper proposes a composite control method integ...

Coordinated Scheduling of Distribution Network and Transportation System for EVs with Aggregated Flexibility and Endogenous Dynamic Pricing

With the large-scale integration of Electric Vehicles (EVs) into distribution systems, the spatiotemporal uncertainty of charging loads and the interplay between user charging behavior and network operational constraints present new challenges to the safe and economical operation...

Overcoming polarization-breakdown trade-off via hydrogen bonding-modulated molecular stacking in high-temperature high-energy-density flexible dielectric

Flexible dielectrics suffer from an inherent polarization-breakdown trade-off. Herein, we propose a hydrogen bonding-modulated molecular stacking strategy to improve high-temperature capacitive energy storage performance. A series of polyetherimide copolymers with tunable hydroge...

Synergistic Adsorption‐Catalytic Effect Based on Hierarchical Porous Structure and Lewis Acidic Cu + Sites in Cu 2 O@MXene for Boosting the Performance of RT Na–S Batteries

ABSTRACT Room‐temperature sodium–sulfur (RT Na–S) batteries offer high energy density and low cost but suffer from poor conductivity, sluggish redox kinetics, and polysulfide shuttling. This study introduces a multifunctional Cu 2 O@MXene separator with a hierarchical porous stru...

Regional frequency response analytical model for three-region interconnected power systems considering fast frequency response resources

Frequency Response (FR) is critical for mitigating frequency fluctuations and maintaining stability in power systems, particularly as modern power systems integrate more renewable energy. This paper addresses the challenges of increased frequency variability and decreased FR capa...

Emission spectra and diagnosis of C4F7N/CO2 discharge faults

Abstract The C 4 F 7 N/CO 2 mixed gas is regarded as one of the most promising environmental-friendly alternatives to SF 6 . Studying its discharge spectral characteristics under different voltages and fault types is of great significance for insulation condition monitoring and f...

Building Heat Demand-Driven Collaborative Design and Capacity Substitution Mechanism of Building–PVT Solar Heating Systems

The building heat demand and the energy system capacity are usually designed independently in solar heating systems for rural houses in cold regions. This leads to oversized system capacity and a lack of collaborative design between the building side and the energy system side. T...

Optimization and operation strategy for demand response in Park Energy Systems with Public Buildings

Abstract Public-building central air conditioning (CAC) systems provide substantial load flexibility because of their significant thermal inertia. However, existing optimization studies of park energy systems commonly represent them as conventional flexible loads, with insufficie...

Exploring baryon semileptonic decays through polarization and entanglement

Abstract The unitarity of the Cabibbo–Kobayashi–Maskawa (CKM) matrix is a cornerstone of the standard model (SM). Precise tests of this unitarity require independent determinations of its elements, such as | V us |, which governs the transition between strange and up quarks. Curr...