Periodica Polytechnica Transportation Engineering最新文献_第8页

A Comprehensive Review of the Simulation Methods for Analysis at the Pore-scale 孔隙尺度模拟分析方法综述

Periodica Polytechnica Transportation Engineering Pub Date : 2023-01-12 DOI: 10.3311/pptr.18452

Herman Szűcs, B. Vehovszky, B. Sanders

引用次数: 0

Demand-responsive Users' Travel Behavior and Satisfaction Analysis in Small Cities 小城市需求型用户出行行为及满意度分析

Periodica Polytechnica Transportation Engineering Pub Date : 2022-12-19 DOI: 10.3311/pptr.19914

Ahmed Jaber, Khaled Al-Sahili, J. Juhász

引用次数: 1

Determination of the Minimum Number of Possible Testing Situations in Autonomous Driving Using Critical Phenomena 利用临界现象确定自动驾驶中可能的测试情况的最小数量

Periodica Polytechnica Transportation Engineering Pub Date : 2022-11-16 DOI: 10.3311/pptr.20767

Gábor Kiss, P. Bakucz, Á. Szeghegyi

引用次数: 1

Assessment of the Braking System Damage in the Public Transport Vehicles of a Selected Transport Company 选定运输公司公共交通车辆制动系统损坏评估

Periodica Polytechnica Transportation Engineering Pub Date : 2022-11-16 DOI: 10.3311/pptr.16491

I. Rybicka, P. Droździel, H. Komsta

{"title":"Assessment of the Braking System Damage in the Public Transport Vehicles of a Selected Transport Company","authors":"I. Rybicka, P. Droździel, H. Komsta","doi":"10.3311/pptr.16491","DOIUrl":"https://doi.org/10.3311/pptr.16491","url":null,"abstract":"This paper analyzes damage to safety systems over a five-year period for a group of vehicles. In the first step of analysis, descriptive statistics characterizing the analyzed variables were calculated and analyses related to the assessment of damage to the braking system. The analyses were carried out in order to examine the relationship between the mileage of vehicles and the number of defects quarterly and monthly and the fit of the obtained empirical results of the analysed variables to a normal or other theoretical distribution was checked. In order to check whether the observed differences in the mean values of the number of failures of the safety systems are statistically significant, a non-parametric analysis of variance was performed. The Kolmogorov-Smirnov test was applied, the distribution of the monthly sum of the braking system faults, distribution of the sum of the braking system faults from individual quarters, distribution of the monthly kilometrage of all vehicles and distribution of the quarterly kilometrage of all vehicles were presented. After describing previous correlation analyses, a linear regression analysis was conducted in which a model was built to predict the number of braking system faults based on monthly vehicle mileage and month of measurement. The last part of the analysis was to verify whether the number of the braking systems faults depends on the season of the year and it was checked whether the season makes any difference to the vehicle's quarterly kilometrage. One-way analysis of variance (ANOVA) was carried out to this end.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44972061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Modeling of Thermal Preparation of Shock Absorbers of Trucks 货车减振器热制备建模

Periodica Polytechnica Transportation Engineering Pub Date : 2022-11-08 DOI: 10.3311/pptr.18961

R. Chernukhin

{"title":"Modeling of Thermal Preparation of Shock Absorbers of Trucks","authors":"R. Chernukhin","doi":"10.3311/pptr.18961","DOIUrl":"https://doi.org/10.3311/pptr.18961","url":null,"abstract":"The use of modern materials and technical fluids allows you to operate cars at negative temperatures, but in some regions of the world (for example, in Siberia), the ambient air temperature can fall below 243 K for several weeks or even months. The operation of trucks at such a temperature refers to extreme conditions that force the special preparation of equipment. This preparation consists not only of special maintenance, but also of carrying out some activities that are carried out immediately before starting the engine and driving. The essence of these measures is, among other things, the thermal preparation of the components and assemblies of the vehicle before departure.This work is devoted to the thermal preparation of truck shock absorbers. It is revealed that the use of oils, the kinematic viscosity of which significantly depends on the ambient temperature, is a limiting factor in the winter operation of shock absorbers. The simulation of the operation of electric flexible heaters for shock absorbers in the SolidWorks Flow Simulation environment was carried out and the preheating efficiency was evaluated. It is established that the temperature distribution of the shock absorber fluid during heating of two-pipe shock absorbers occurs unevenly, but despite this, preheating significantly improves the characteristics of shock absorbers and contributes to the safe and long-lasting operation of trucks.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48024620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Route Choice Model for Urban Public Transit with Headway-based Service 基于超前服务的城市公共交通路线选择新模型

Periodica Polytechnica Transportation Engineering Pub Date : 2022-11-07 DOI: 10.3311/pptr.15864

P. Horbachov, O. Makarichev, O. Svichynska

引用次数: 0

Spectral Non-Stationarity in Road Vehicle Vibrations 道路车辆振动的谱非平稳性

Periodica Polytechnica Transportation Engineering Pub Date : 2022-10-27 DOI: 10.3311/pptr.18318

L. Hári

引用次数: 0

Virthuman Application: Is an Autonomous Vehicle with Non-standard Seating Safe in a Side Crash? 维图曼应用:采用非标准座椅的自动驾驶汽车在侧面碰撞中安全吗?

Periodica Polytechnica Transportation Engineering Pub Date : 2022-10-12 DOI: 10.3311/pptr.16972

Abbas Talimian, J. Vychytil

{"title":"Virthuman Application: Is an Autonomous Vehicle with Non-standard Seating Safe in a Side Crash?","authors":"Abbas Talimian, J. Vychytil","doi":"10.3311/pptr.16972","DOIUrl":"https://doi.org/10.3311/pptr.16972","url":null,"abstract":"Highly Automated Vehicles (HAVs) will be more comfortable for their occupants than common cars from different aspects. For instance, their occupants can access extra spaces to adjust their seats as there will be no steering wheel and gearbox transmission handle in the interior. Among a wide range of seating configuration possibilities, the majority of passengers prefer to be in the Face-to-Face or the Living room configurations that are known as non-standard seating configurations. The present survey investigated how safe are these non-standard seating configurations in a side crash in comparison with the standard one in which all seats are facing the front windshield. Four identical 50th percentile Virthuman models were integrated into a schematic of automated vehicle's interior. Standard three-point seatbelts fastened bodies to up-right seats made from Polyurethane foam. A 30 km/h crash acceleration pulse was applied to the model for simulating side crash with a virtual sledge test in the Virtual Performance Solution (VPS) environment, PAMCRASH module. Results revealed that the Living room configuration was safer for the Rear Left occupant in comparison with the Standard one. Also, the Front Left occupant did not experience safer occasions in non-standard configurations from a Head & Neck injury point of view.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43042405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Service-Oriented Architecture for Providing ITS Services in Vehicular Ad Hoc Networks 面向服务的车载自组织网络ITS服务体系结构

Periodica Polytechnica Transportation Engineering Pub Date : 2022-10-06 DOI: 10.3311/pptr.18402

K. Ullah, U. Habiba

{"title":"Service-Oriented Architecture for Providing ITS Services in Vehicular Ad Hoc Networks","authors":"K. Ullah, U. Habiba","doi":"10.3311/pptr.18402","DOIUrl":"https://doi.org/10.3311/pptr.18402","url":null,"abstract":"Vehicular Ad hoc Network (VANET) is the cutting edge technology for smart transportation. VANET becomes an important aspect of the Intelligent Transport System (ITS). Different safety and non-safety applications have been developed for VANET. The inspiration behind VANET is to provide safe, and pleasant journeys to the drivers and passengers. Although the quality of software depends upon its architecture, most of them do not give proper attention to the consideration of Software-Oriented Architecture (SOA) for providing safety and non-safety ITS services in VANET. To address this issue, we proposed an efficient software architecture by highlighting the important operations and services of the system. The performance of the proposed architecture is evaluated by several design metrics and the results are compared with a state-of-the-art solution. The results showed that our proposed architecture has low coupling and high cohesion factors. Furthermore, the results reveal that our architecture is less complex and more reusable. From the results, we conclude that the proposed architecture is suitable for providing safety and non-safety ITS services and will pave the way for the implementation of the futuristic vision of the ITS.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41368528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring Commuting for Work in Kuala Lumpur 探索在吉隆坡通勤工作

Periodica Polytechnica Transportation Engineering Pub Date : 2022-09-23 DOI: 10.3311/pptr.18761

Haliza Mohd Zahari, Nur Hidayah Azhar, A. Ismail, R. Baker, Nur Surayya binti Mohd Saudi

{"title":"Exploring Commuting for Work in Kuala Lumpur","authors":"Haliza Mohd Zahari, Nur Hidayah Azhar, A. Ismail, R. Baker, Nur Surayya binti Mohd Saudi","doi":"10.3311/pptr.18761","DOIUrl":"https://doi.org/10.3311/pptr.18761","url":null,"abstract":"Many workers face challenges in suburban areas when commuting to the urban areas from home to work. Public transportation is a fundamental component of efficient transportation in urban areas. Efficient transportation will increase economic opportunity, accessibility, and social development. This paper explored the characteristics of commuting behavior of the workers in the Klang Valley who commute to work in Kuala Lumpur, including their choice of transportation modes and the challenges they faced in traveling from home to work. This study engaged a mixed methodology where data were collected from 709 respondents voluntarily. The survey was initiated in December 2020 and lasted for six months. The respondents were approached through voluntary face-to-face and electronic means. Interviews were conducted with 14 key informants in April 2021 with workers from various backgrounds who commute to work every day. The interviews were done one-on-one. The result showed that the likelihood of choosing public transport over driving privately owned car was unfavorable where most individuals stated that the public transportation was insufficient; they had to take more than one modes to reach their workplace, and the facilities provided were insufficient for them to choose public transportation for commuting to work. These results shown that the urban workers in Kuala Lumpur preferred to drive to work rather than using public vehicles. This shows that Malaysians, especially in urban areas such as Kuala Lumpur, are not ready to adapt to SDG 11. Therefore, the government needs to create more initiatives to encourage the use of public transport.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45715191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1