The magnetocaloric effect and thermal conductivity of two gadolinium hydroxides, Gd(OH)₃ (<bold>1</bold>) Gd₂O(OH)₄(H₂O)₂ (<bold>2</bold>), were investigated, respectively, revealing that <bold>1</bold> is the most promising candidate for an ultra-low temperature magnetic refrigeration material.

Metal single atoms coordinated with four nitrogen (M1N4) are regarded as tremendously promising catalysts for the electrocatalytic oxygen reduction reaction (ORR). Nevertheless, strong bond intensity between metal center and O atom in oxygen-containing intermediates significantly limits ORR activity of M1N4. Herein, catalytically active B is successfully introduced into second coordination sphere Fe (Fe1N4-B-C) to realize alternative binding thus facilitate activity. Compared pristine Fe1N4...

Abstract Identifying protein–protein interaction (PPI) site is an important step in understanding biological activity, apprehending pathological mechanism and designing novel drugs. Developing reliable computational methods for predicting PPI as screening tools contributes to reduce lots of time expensive costs conventional experiments, but how improve the accuracy still challenging. We propose a predictor, called Augmented Graph Attention Network Protein-Protein Interacting Site...

Pantograph-catenary arc fault is the primary factor threatening stability of power transmission for high-speed railway. The motion characteristics pantograph-catenary under low air pressure and strong airflow significantly different from case atmospheric pressure. In this paper, an experimental platform was built to investigate root position-time column longitudinal drift height-time characteristic curves pressures velocites. Via analysing corresponding results, it can be found that there...

ABSTRACT Prediction of molecular odors is crucial for synthetic chemistry and the perfume industry. This paper presents a dual‐branch graph neural network model predicting odors, named ScentGraphX, which combines transfer learning with attention mechanisms to address limitations existing models. The ScentGraphX captures atomic, chemical bond, structural features molecules through feature encoder subgraph encoder. Experimental results show that exhibits superior performance on dataset...

The power transformer is a key element in system and its condition needs to be monitored evaluated. However, subject electrical, thermal, mechanical stresses, the of can eventually deteriorate causing loss transformer's useful life. Utilizing various monitoring data transformer, this paper applies state-space model method remaining life estimation. In model, state dynamic equation considering aging mechanism developed. Three measurement equations using different types are established. To...

Measurements of space charge density and trap levels are informative ways to predict failure conditions insulation materials. The charges injected from electrodes penetrate surface towards deep inside the material. In order resist injection, trapping, migration increase recombination, detrapping extraction rate, layer (nanocomposite-PI-nanocomposite) sandwich structure samples used. Two techniques Pulse Electro Acoustic (PEA) Thermal Stimulated Current (TSC) combined characterize behavior...

Ultra-high frequency (UHF) partial discharge (PD) detection is essential for routine maintenance of gas-insulated switchgear (GIS). Realizing low-noise with cost-effectiveness and ease installation promising but challenging. This paper presents a novel broadband noise-shaping network (BNSN) integrated printed monopole antenna (PMA) sensor to realize sufficient noise rejection good impedance matching. Moreover, by analyzing the equivalent circuit codesigning high-speed preamplifier proposed...

Oil-paper insulation of higher voltage winding and traction in on-board transformers frequently withstand large AC fluctuation voltages mainly combined with inter-harmonic components. This paper presents the characteristics partial discharge (PD) oil-paper under superimposed voltages. The experimental results show that addition to fundamental sinusoidal component variation peak dv/dt along phase. has a significant impact on PD including inception (PDIV), breakdown voltage, repetition rate,...

Polyimide (PI) films, which are widely used in turn-to-turn insulation of inverter-fed motors, generally degraded by bipolar continuous square impulse voltage (BCSIV) induced partial discharge (PD). In this paper, Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> nanoparticles were dispersed into PI (with 0, 2, 5 and 8 wt.%) to prepare PI/Al nanocomposites. order understand the...

Insulation failure of composite epoxy insulation materials in distribution switchgear under the stress heat and humidity is one leading causes damage to components. This work prepared by casting curing a diglycidyl ether bisphenol A (DGEBA)/anhydride/wollastonite system, performed material accelerated aging experiments three conditions: 75 °C 95% relative (RH), 85 RH, 95 RH. Material, mechanical, thermal, chemical, microstructural properties were investigated. Based on IEC 60216-2 standard...

This paper presents a detailed investigation into the contributions of different sound sources to exterior noise high‐speed train both experimentally and by simulations. The in situ measurements train, including pass‐by source identification, are carried out on viaduct. Pass‐by characteristics, localizations, regions, vertical distributions considered data analysis, it is shown how they affected speed. An simulation model established based method ray acoustics, inputs come from array...

Measurements of space charge density and trap levels are informative ways to predict failure conditions insulation materials. The charges injected from electrodes penetrate surface towards deep inside the material. In order resist injection, trapping, migration increase recombination, de-trapping extraction rate, layer (nanocomposite-PI-nanocomposite) sandwich structure samples used. Two techniques Pulse Electro Acoustic (PEA) Thermal Stimulated Current (TSC) combined characterize behavior...

High-frequency (HF) oil-immersed transformers with small size and light weight have been paid wide attention by researchers. Its oil–paper insulation frequently withstands HF over-voltages at frequencies of several kilohertz above, resulting in the too early failure insulation. In order to investigate effect on insulation, this article investigates partial discharge (PD) characteristics under stress. The experimental results show that a frequency-induced inflection point is existed near 10...

S-block single atoms represent an ideal catalyst for the oxygen reduction reaction (ORR) as they can suppress Fenton reaction. However, symmetry of s/p orbitals tends to generate either excessively strong or weak interaction with intermediates. Herein, Ca coordinated -S, -OP, and three N (Ca/NPS-HC) were fabricated modulate adsorption intermediates promote efficiency s-block ORR catalysts. The experimental results from demonstrated that Ca/NPS-HC exhibited outstanding catalytic capability a...

Energy efficiency has become a very important issue to reduce the consumption of resources on Earth. We have consider how save energy anywhere and anytime, including large set servers, for example, servers in Google company. Hence, power recently key concerns, especially huge number are deployed cluster configurations as data centers Web hosting facilities. Even though we emphasize saving much possible, performance should be ensured. So far, there been some discussions about enhancing...

Underwater wireless sensor networks is composed of a variable number that communicated with each other using acoustic signal and the nodes are deployed in some special underwater environment for monitoring tasks. Designing feasible channel essential turns out great challenge characteristics environment. The motivation studying performance UWSN to provide reference deploying exhibits multi-path propagation results fading phase fluctuations at receivers. Doppler effect another phenomenon...