Freight-train derailments represents a significant hazard to human safety and the economy. However, few studies have explored contributory interactive characteristics of risk factors influencing economic costs across various track classes. We proposed novel Choquet integral-based multivariate polynomial regression (CI-MPR) model predict cost via states four factors—number derailed cars (DC), derailment speed (DS), loading factor (LO), residual train length (RL). The results indicated that...

Regenerative braking systems (RBSs) are a transformative technology in the automotive industry, widely adopted new energy vehicles (NEVs), especially electric ones. This study comprehensively reviews RBS research, including its origin, working principle, classification, and current status using VOSviewer. article provides an in‐depth analysis discussion of latest research progress key technologies such as mechanical design, logic control optimization, technical evaluation. It is found that...

After the outbreak of COVID-19 pandemic, naturally dissimilar prevalence infection resulted in a growing imbalance between supply and demand for medical staff. Rebalancing staff seems pressing task following uncertain environment. However, once collected data are contaminated, optimal solution obtained through traditional methods may be located far away from true one. In this sense, finding robust optimization method that is less sensitive to outliers accounts future events warranted....

Image fire recognition is of great significance in prevention and loss reduction through early detection warning. Aiming at the problems low accuracy existing high error rate tiny target detection, this study proposed a model based on channel space attention mechanism. First, convolutional block module (CBAM) introduced into first last layers EfficientNetV2, which shows strong feature extraction ability computational efficiency as backbone network. In terms aspects, weights layer are...

Electric vehicle (EV) fire accidents are caused by multiple factors, including the traffic conditions, parking environment and firefighting facilities, a typical public safety issue in cities. Owing to lack of accurate quick estimation methods for EV analysis roadside scenarios their impacts, this study applied solid flame model simplify determination dynamic turbulence characteristics flames proposed thermal radiation an runaway combustion based on peak heat release rate. Subsequently,...

Cable overload is one of the most critical contributors to early cable fires. This study proposes a hybrid Bayesian network (BN)-based fire risk analysis model, investigate evolution overload-induced risks. In particular, transmission paths caused by are reported, considering factors that likely lead A BN with specific structure was considered using paths. Later, given index system, assessment model developed based on entropy weight method. Subsequently, corresponding levels were evaluated...

Pole-type structures are vulnerable to earthquake events due their slender shapes, particularly porcelain cylindrical equipment in electrical substations, which has inherent fragility and low strength its materials. Traditional base isolation designs configure the bottom of pole-type as hinges with restraints. It fully relies on restrainers re-center equipment, posing a risk tilting functionality failure after earthquakes. This study proposes solution this challenge by introducing restrained...

LEC method is suit for all kinds of working conditions it being simple and convenient. But the credibility evaluation conclusion by low because affected subjective factors easily difficult to assign. In paper, modified improved after C decided into five based on composition accident lose in construction sites are given weights. The example application shows that with coincides actual situation, so can be used evaluate hazard source sites.

The continuous-space single- and multi-facility location problem has attracted much attention in previous studies. This study focuses on determining the globally optimal facility locations for two- higher-dimensional problems when Manhattan distance is considered. Before we propose exact method, start with single-facility obtain global minimizer using a statistical approach. Then, an method developed to determine solution problem, which different from clustering algorithms. Based newly...

Phthalates has been widely used in children's toys as plastic plasticizers and softeners. The aim of this study was to extract chemically phthalates from 20 toy samples determine toxicity using the Vibrio fischeri luminescent bacteria test. Subsequently (the concentration producing 50% maximal effect) employed characterize sample select appropriate solvent methanol, ethanol or glycerol order assess adverse effects di-n-butyl phthalate (DBP) di-2-ethylhexyl (DEHP) not interference on...

According to the grey system theory and markov principle, fitting accuracy index is stochastic fluctuant when time series data development trend fitted through theory; but principle suitable for processing with great fluctuation; therefore, a forecast model put forward which in accordance characteristics of construction accidents' statistical based on principle. The dynamic forecasting process featured by short time, small quality fluctuation. conclusion about accidents grey-markov more...

The fire risk of cables constantly changes over time and is affected by the materials working conditions cables. To address its internal timing property, it essential to use a dynamic analysis method assess cable risk. Meanwhile, data uncertainty resulting in deviation values must also be considered assessment. In this regard, study proposes hybrid cloud model (CM)-enabled Dynamic Bayesian network (DBN) estimate under uncertainty. particular, CM initially applied determine membership degrees...

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Studio apartments have become more widely used in hotels, dormitories and rental housing recently. However, studio present higher fire risks than other residential buildings. Therefore, it is crucial to investigate the development trend evacuation strategies for apartments. Taking a L-shaped apartment building Beijing as case study, this study analyzes risk scenarios resulting from smart home appliances. Pyrosim simulate smoke spreading under different scenarios. Meanwhile, new strategy...

Construction safety is influenced by a lot of factors. By the traditional Analytic Hierarchy Process, relative importance some factors marked with point value experts , which increases judgment uncertainty. Based on characteristics construction, evaluation index system for construction sites established, weight each decided Interval Process (IAHP) and its consistency tested as well. It shown that rating is: production management, technical subcontract education, environment health condition...