Acta Technica Jaurinensis最新文献

Tool path planning of ball-end milling of free-form surfaces as a search algorithm 自由曲面球端铣削的刀具路径规划搜索算法

Acta Technica Jaurinensis Pub Date : 2024-03-14 DOI: 10.14513/actatechjaur.00736

Abdul W. Mgherony, Balázs Mikó

引用次数: 0

Analysis of Normative Requirements and Technical Specifications of a Structural Design of the Mechanical Device Operating in the Amusement Industry 游乐业机械装置结构设计的规范要求和技术规格分析

Acta Technica Jaurinensis Pub Date : 2024-03-14 DOI: 10.14513/actatechjaur.00729

Denis Molnár, M. Blatnický, Ján Dižo, Sebastián Solčanský, Dávid Čierňava

引用次数: 0

Soft computing implementations for evaluating Los Angeles abrasion value of rock aggregates from Kütahya, Turkey 评估土耳其库塔赫亚岩石集料洛杉矶磨蚀值的软计算实施方案

Acta Technica Jaurinensis Pub Date : 2024-02-28 DOI: 10.14513/actatechjaur.00731

E. Köken

{"title":"Soft computing implementations for evaluating Los Angeles abrasion value of rock aggregates from Kütahya, Turkey","authors":"E. Köken","doi":"10.14513/actatechjaur.00731","DOIUrl":"https://doi.org/10.14513/actatechjaur.00731","url":null,"abstract":"The Los Angeles abrasion value (LAAV) of rocks is a critical mechanical aggregate property for designing road infrastructures and concrete quality. However, the determination of this critical aggregate property is labour-intensive and time-consuming and thus, in the literature, there are many predictive models to estimate the LAAV for different rock types. However, most of them are based on classical regression analyses, limiting their broader usage. In this study, several soft computing analyses are performed to develop robust predictive models for the evaluation of LAAV of rocks in the Ilıca region (Kütahya – Turkey). The main motivation for implementing soft computing analyses is that precise predictive models might be useful when exploring suitable rock types that are manufactured in crushing–screening plants. For this purpose, a comprehensive laboratory schedule was established to obtain some inputs for the evaluation of LAAV. As a result of the soft computing analyses, four robust predictive models are developed based on artificial neural networks (ANN), multiple adaptive regression spline (MARS), adaptive neuro-fuzzy inference system (ANFIS) and gene expression programming (GEP) methodologies. The performance of the proposed models is investigated by some statistical indicators such as R2 and RMSE values and scatter plots. As a result, the ANFIS-based predictive model turns out to be the best alternative to estimate the LAAV of the investigated rocks.","PeriodicalId":323980,"journal":{"name":"Acta Technica Jaurinensis","volume":"520 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140417497","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

Influence of different factors on the value of the rail wear rate 不同因素对钢轨磨损率值的影响

Acta Technica Jaurinensis Pub Date : 2024-02-28 DOI: 10.14513/actatechjaur.00735

Yurii Makarov, Roman Zaleskyi, Mykola Mykhalichenko

{"title":"Influence of different factors on the value of the rail wear rate","authors":"Yurii Makarov, Roman Zaleskyi, Mykola Mykhalichenko","doi":"10.14513/actatechjaur.00735","DOIUrl":"https://doi.org/10.14513/actatechjaur.00735","url":null,"abstract":"The article deals with the study of the influence of train operating modes on the uphill and downhill sections with radii less than 450 m, as well as the influence of railway superstructure design in curved sections on the wear rate of rolling stock wheel flanges and rails. The aim of the research is to reduce the wear that occurs between the wheel flanges of the rolling stock and the rails. Rail joints have been found to be the main shock source in the dynamic interaction between the railway and the rolling stock. There is unstable motion within the transition curves and at the joints of the curved rail on the curved track sections. This is accompanied by abrupt lateral rail wear in the joint area between the trailing and facing rails in the direction of train movement. It has been found that reducing the weight of the trains leads to a reduction in intensive lateral rail wear on curved track sections and can reach the following percentages: in curves with a radius of up to 300 m: up to 33% uphill, up to 55% downhill; in curves with a radius of 300 m to 450 m: up to 32.9% uphill, up to 26.3% downhill; in curves with a radius of 450 m: up to 3.2% uphill, up to 17.6% downhill. On the uphill and downhill sections, reducing the height and adjusting to the speed limit in percentage gives a positive result from 4.7% to 53.59%.","PeriodicalId":323980,"journal":{"name":"Acta Technica Jaurinensis","volume":"388 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140417437","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

The development of a stitch-based strain sensor for woven lashing straps 开发用于编织捆扎带的缝合式应变传感器

Acta Technica Jaurinensis Pub Date : 2024-02-19 DOI: 10.14513/actatechjaur.00728

Norman Lesser, Bernd Sadlowsky

引用次数: 0

Use of Zero-crossings Segmentation for Track Quality Assessment 使用零交叉点分割技术进行轨道质量评估

Acta Technica Jaurinensis Pub Date : 2024-02-17 DOI: 10.14513/actatechjaur.00726

Abdaljbbar B. A. Dawod, György Terdik

引用次数: 0

The Impact of Odd-Even Policy on Distance and Time in Private Sector 奇偶校验政策对私营部门距离和时间的影响

Acta Technica Jaurinensis Pub Date : 2024-01-02 DOI: 10.14513/actatechjaur.00716

Agung Chandra

{"title":"The Impact of Odd-Even Policy on Distance and Time in Private Sector","authors":"Agung Chandra","doi":"10.14513/actatechjaur.00716","DOIUrl":"https://doi.org/10.14513/actatechjaur.00716","url":null,"abstract":"Government of Jakarta has struggled to mitigate the traffic congestion by implementing the odd-even policy. This policy has restricted some roads for vehicles to pass in Jakarta in a certain time and this policy needs to be studied further for its impact on distance and time, especially for private companies. The research was conducted in private sectors which its warehouse located in Tangerang and its customers spread in Jakarta, Bogor, Depok, Tangerang and Bekasi. The study focuses on 49 routes that every route had some customers’ location. The sequence for every route was determined if had a shortest distance and/or fastest time with the help of optimoroute software. Then, every route was processed by Google Maps both in normal condition and odd-even policy’s condition in order to get the distance and travel time. The results indicated that around 44.89% of routes have further distance and 16.55% have longer time, these results mean costlier for private companies since odd-even policy has been implemented. The study also compared two alternatives between maintaining current condition and switching to rent a vehicle with third party logistics, the result indicated that maintaining current condition alternative was still beneficial than switching to rent a vehicle alternative.","PeriodicalId":323980,"journal":{"name":"Acta Technica Jaurinensis","volume":"80 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139389887","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

Simulating the alteration in energy consumption at a zebra crossing considering different traffic rates of electric and rule-following autonomous vehicles 模拟斑马线能耗的变化，考虑电动汽车和遵守规则的自动驾驶汽车的不同通行率

Acta Technica Jaurinensis Pub Date : 2023-11-29 DOI: 10.14513/actatechjaur.00722

Szilárd Szigeti, Dávid Földes, Xin Ye

{"title":"Simulating the alteration in energy consumption at a zebra crossing considering different traffic rates of electric and rule-following autonomous vehicles","authors":"Szilárd Szigeti, Dávid Földes, Xin Ye","doi":"10.14513/actatechjaur.00722","DOIUrl":"https://doi.org/10.14513/actatechjaur.00722","url":null,"abstract":"The progressive integration of autonomous vehicle (AV) technology holds the potential to reshape the prevailing traffic landscape. AVs have different driving characteristics than human-driven vehicles, which manifests itself in the strict adherence to speed limit, in giving priority to pedestrians, and in the pre-set headways they can keep. A traffic simulation environment was built around an unsignalized pedestrian crossing to measure the energy consumption of vehicles in the presence of AVs. The simulation environment was modified to adhere pedestrian-accepted gaps between vehicles in case of crossing. Considered vehicle types are yielding or not yielding human-driven, and AVs. Scenarios were built to model the AV traffic share, the different headways kept by AVs, and the various traffic volumes in each direction. The different driving behaviour and traffic share of AVs led to energy consumption changes, which were modelled through scenario analysis. The maximum energy consumption reduction of human-driven vehicles was 10.67% for yielding vehicles and 12.41% for non-yielding vehicles compared to the 0% AV traffic rate. Although, in case of AVs, the energy consumption increased in all scenarios compared to the basic version with only human-driven vehicles. In higher traffic scenarios, where only AVs were on the road, there was a substantial 35,92-96.55% increase in energy consumption, compared to the 0% AV ratio case. Thereby speed of vehicles, following distance and the number of stops affected the overall system efficiency. The results of this study can contribute to the understanding the impact of AVs which can support their introduction.","PeriodicalId":323980,"journal":{"name":"Acta Technica Jaurinensis","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139210473","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

Structural Integrity of Turbine Stator Blades Using Different Super Alloys with Internal Cooling at Fluid Temperature Range of 600 K – 700 K 在 600 K - 700 K 流体温度范围内使用不同超级合金进行内部冷却的涡轮定子叶片的结构完整性

Acta Technica Jaurinensis Pub Date : 2023-11-27 DOI: 10.14513/actatechjaur.00714

O. Towoju, Samuel Enochoghene, John Adeyemi

{"title":"Structural Integrity of Turbine Stator Blades Using Different Super Alloys with Internal Cooling at Fluid Temperature Range of 600 K – 700 K","authors":"O. Towoju, Samuel Enochoghene, John Adeyemi","doi":"10.14513/actatechjaur.00714","DOIUrl":"https://doi.org/10.14513/actatechjaur.00714","url":null,"abstract":"The importance of turbines in power generation cannot be overstated. While the failure in stationary plants can lead to downtime and high repair costs, its failure in mobile plants like the jet engines can be catastrophic with attendant loss of lives. Hence, by all possible means, the prevention of turbine failure is a necessity, and a very good means of doing this is with the use of super-alloys. Super-alloys are tailored to withstand the demands of turbine operations especially stress and elevated temperature and pressure. The blades are thus, manufactured from super-alloys, and of prominence are the Nickel-based super-alloys. The performance of five different super-alloys: (DS) GTD 111, Ti-6Al-4V, Inconel 718, CMSX-4, and Nimonic 80A was simulated using COMSOL MultiPhysics 5.5 at cooling air temperature range of 600 K – 700 K. The mode of cooling employed in the study is only internal cooling. With the developed stress percentage of the yield stress value and the stator blade displacement at the operating conditions as the criteria of performance, super-alloy Ti-6Al-4V faired as the best material for the stator blade.","PeriodicalId":323980,"journal":{"name":"Acta Technica Jaurinensis","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139233283","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

Challenges of the visual line of sight operations of unmanned aerial vehicles 无人驾驶飞行器视线操作面临的挑战

Acta Technica Jaurinensis Pub Date : 2023-11-24 DOI: 10.14513/actatechjaur.00717

Z. Sándor

引用次数: 0