Highway bridge networks (HBN) are one of the critical components a transportation system that supports operation modern society. The traffic-carrying capacity is essential for emergency responses in catastrophic seismic hazard. In this article, methodology proposed to assess regional performance HBN considering post-disaster traffic demand conditions. First, framework introduced. Then, topological properties and vulnerability analyses conducted understand connectivity damaged networks....

Purpose The engineered cementitious composite (ECC)-reinforced concrete (RC) beam is an innovative structure, and its design implementation rely on little experimental data. machine learning (ML) technique, as adjunct, can efficiently broaden the scope of This paper aims to present a novel approach for predicting bending capacity ECC-RC designs. Design/methodology/approach A dataset comprising 210 test results was utilized train model, employing ten techniques prediction. Shapley additive...

Rapid seismic fragility analysis of regular bridges is necessary for the increasingly utilized regional risk assessment, which usually difficult using numerical methods owing to computational requirements. Therefore, this study presents an artificial neural network (ANN)-based methodology multi-span bridges, considers influencing characteristics and their uncertainties. For ANN model development, finite element (FE) models analyses are investigated in detail, based on parameters critical...

Due to the unclear mechanism and lack of effective design for color-tunable ultralong organic phosphorescence (UOP) in a single-component molecule, development new types UOP materials with property remains challenging. Herein, commercially available triphenylmethylamine-based phosphors featuring color-tunablity lifetime (0.56 s) are reported. The changed afterglow colors from cyan orange were observed after different wavelengths UV excitation. Crystal structure calculation studies show that...

Quick post-disaster emergency response of highway bridge networks (HBNs) is vital to alleviating the impact disasters in affected areas. Nevertheless, achieving their resilience remains challenging due difficulty accurately capturing capacity HBNs and rapidly evaluating damage states regional bridges. This study delves into response, seismic resilience, recovery scheduling subjected frequent yet mostly ignored moderate earthquakes. Firstly, feasibility intelligent methods explored as a...

Coastal bridge piers suffer random performance deterioration owing to the presence of complex nonuniform corrosion characteristics and material uncertainties. Some these will also be threatened by earthquakes during a long-term service period, therefore, structural safety needs probabilistically assessed seismic reliability method. To deal with this problem, we present method calculate time-dependent coastal pier, comprehensively considering randomness event, corrosion, uncertainty. First,...

Abstract In order to avoid oil and gas leakage or explosion due corrosion defects cracks in pipelines tanks, it is very important test the tanks service. this study, a three-dimensional (3-D) finite element method (FEM) simulation model of magnetic flux (MFL) field was established. The MFL signals were simulated analyzed connection with different lift-off values, considering condition mechanical vibration electromagnetic noise. best range values can be determined from results analysis. This...

This study explores the possibility of using an ANN-based model for rapid numerical simulation and seismic performance prediction reinforced concrete (RC) columns. The artificial neural network (ANN) method is implemented to relationship between input features RC columns critical parameters commonly used lumped plasticity (LP) model: strength yielding, capping ultimate deformation capacity. Cyclic test data 1163 column specimens obtained from PEER NEEShub database other sources are collected...

Abstract To facilitate seismic analysis of bridges, especially on a regional scale, this study established parametric finite element model bridges incorporating simplified component elements. It employs knowledge-enhanced neural network (KENN) to calibrate the parameters lumped plasticity pier columns. Along with database historical experimental results, influence key characteristics reinforced concrete columns are investigated and formulated as physical laws supervise KENN training. The...

Abstract Swainsonine (SW, 1 ), a unique indolizine with poly‐hydroxyl groups, was re‐isolated from the plant endophytic fungus Alternaria oxytropis. The structure (including planar and relative configuration) systematically elucidated by NMR spectra H, 13 C, H‐ H COSY, HMQC, HMBC, NOESY in DMSO‐ d 6 CD 3 OD); of modified Mosher's products were first used to determine absolute configuration SW. More importantly, complex coupled features H‐7α, H‐7β, H‐6α spectrum ( ) analyzed details, which...

Cables have usually served as critical and vulnerable structural components in long-span cable-supported bridges. Cable inspections revealed that corrosion, fatigue, or coupled corrosion-fatigue were the ones of main failure mechanisms. This paper proposed a stochastic modeling method for three-dimensional (3D) corrosion pits high-strength bridge wires, which can be applied to rapid fatigue life evaluation according mass loss caused by surface wires nondestructively. High-strength steel wire...

To cope with harsh working conditions, new corrosion-resistant coated steel wires higher tensile strength have been developed. This study investigates the corrosion characteristics of a zinc–aluminum alloy-coated wire under stress conditions. The particulate products generated by oxidation coating in initial stage are converted into layer-structured at early corrosion. Moreover, high-stress conditions significant influence on critical conversion time from to iron matrix stage. Thus, uniform...

Abstract The transition duct is a core part of aeroengines, connecting low and high-pressure compressors (LPC & HPC). Nowadays, the balance between stability airflow compactness ducts has been major concern designers. Unstable flows growth at mass flow rate operating point may cause accidents. A detailed understanding field crucial for achieving an optimal safe design. URANS simulation conducted based on combined model strutted outlet guide vane (OGV) LPC. Focusing dynamics vortices...

In the near-stall condition, axial flow compressor experiences an unstable phenomenon known as rotating instability (RI), which typically manifests a broad bulge in near-wall pressure spectrum, occurring at frequencies lower than blade passing frequency (BPF). It is considered primary source of other instabilities such non-synchronous vibration (NSV) and tip clearance noise (TCN), attracting considerable attention from researchers recent years. This paper conducts numerical simulation...

Abstract Flexible organic field-effect transistor nonvolatile memories (OFET-NVMs) with polymer electrets have aroused great attention for its important role in next-generation flexible data storage devices application. However, the OFET-NVMs to date still hardly reach requirements practical applications. In air environment, positively charged defects formed pentacene near interface polymer, result unsatisfied high programming/erasing (P/E) voltages. Here, we propose an OFET memory...