Transport and Communications Science Journal最新文献_第4页

Enhanced-GA supports traffic signal optimizations and protects the urban environment 增强型全球导航支持交通信号优化，保护城市环境

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.11

Manh Do Van, Hoc Tran Quang, Giang Le Khanh, Cong Tran Duc, Phuong Vu Ngoc

{"title":"Enhanced-GA supports traffic signal optimizations and protects the urban environment","authors":"Manh Do Van, Hoc Tran Quang, Giang Le Khanh, Cong Tran Duc, Phuong Vu Ngoc","doi":"10.47869/tcsj.75.4.11","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.11","url":null,"abstract":"Much current research on traffic signal optimization often neglects the impact of environmental factors in urban areas. This can result in suboptimal solutions that do not consider the effects of traffic on air pollution and the overall urban environment. To address this issue, this article proposes a solution that combines Enhanced GA with a comprehensive framework for considering environmental factors in traffic signal optimization. By optimizing traffic signal timings and minimizing emissions, the proposed solution aims to reduce congestion and improve urban transportation networks' efficiency while protecting the environment. The proposed approach uses a set of optimization algorithms and assumptions to generate a comprehensive framework for traffic signal optimization. These algorithms and assumptions consider environmental factors such as air quality and the impact of traffic on the local ecosystem. Moreover, this article provided the enhanced genetic algorithm operators and suggested model formulation that could be applied in other research on traffic signal optimization directly to reduce calculation times and increase the efficiency of the novel suggested models","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"129 45","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140977116","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

Seismic analysis of a soil-liquid tank system using the two-step method 采用两步法对土液罐系统进行地震分析

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.2

Quan Huynh Van

引用次数: 0

Lane detection using hough transformation and Yolov8 使用霍夫变换和 Yolov8 进行车道检测

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.15

Bach Nguyen Viet, Tung Pham Xuan

{"title":"Lane detection using hough transformation and Yolov8","authors":"Bach Nguyen Viet, Tung Pham Xuan","doi":"10.47869/tcsj.75.4.15","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.15","url":null,"abstract":"Autonomous vehicles necessitate the integration of advanced technologies such as computer vision and deep learning to comprehend and navigate their surroundings. A crucial yet challenging component of this integration is the accurate detection of lanes, which can be influenced by a multitude of varying lane characteristics and conditions. This research undertakes a comparative analysis of lane detection methodologies, explicitly focusing on traditional image processing techniques and Convolutional Neural Networks (CNNs). The evaluation utilized a sample of 500 images from the CULane dataset, which encompasses a diverse range of traffic scenarios. Initially, a method incorporating Gaussian blurring, Canny edge detection, and Hough line transformation was examined. Despite its efficiency, operating at 30 frames per second, this approach exhibited a high error rate (average Mean Squared Error (MSE) of 0.537), which is attributable to the loss of critical image details during the preprocessing stage. Subsequently, the performance of a fine-tuned YOLOv8 model, trained on a reformatted version of the CULane dataset was assessed. The combination of object detection and subsequent Hough transformation yielded high accuracy, demonstrating the model’s ability to learn and identify relevant lane features. The deep CNNs demonstrated superior performance over classical image processing techniques in terms of lane detection accuracy, thereby underscoring their potential applicability within the realm of autonomous vehicle technology","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140972031","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

Prediction of machining performances in powder mixed electro-discharge machining to process skd61 steel by response surface methodology 用响应曲面法预测加工 skd61 钢的粉末混合放电加工的加工性能

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.12

Le Van Tao, Banh Tien Long, Nguyen Thi Hong Minh, Hoang Tien Dung, Dang Van Thuc, Phan Hoang Cuong

{"title":"Prediction of machining performances in powder mixed electro-discharge machining to process skd61 steel by response surface methodology","authors":"Le Van Tao, Banh Tien Long, Nguyen Thi Hong Minh, Hoang Tien Dung, Dang Van Thuc, Phan Hoang Cuong","doi":"10.47869/tcsj.75.4.12","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.12","url":null,"abstract":"In electro-discharge machining (EDM) with mixing powder, it is called powder mixed electro-discharge machining (PMEDM), then machining performances- i.e. material removal rate(MRR) and tool wear rate (TWR) has great significance in evaluating the effectiveness and machining accuracy of the machining method. Therefore, in this study, response surface methodology (RSM) was utilized for estimating functions of process variables {comprising peak current (Ip), pulse on time (Ton), and powder concentration (Cp)} for the machining performances for processing SKD61 steel during EDM process with tungsten compound powder. Box-Behnken matrix was utilized for designing and conducting a series of empirical trials. Analysis of variance (ANOVA) was applied to evaluate the adequate of predictive models. The outcomes reveal that the predicted models of MRR and TWR have a high precision with R2 values of MRR and TWR being 99.2% and 99.11%, respectively. The error comparison of the predictive and empirical values for the confirmed experiments is less than 5%, this once again consolidates that the developed models' accuracy. These development models can efficiently prognosticate the desired machining performances of the PMEDM method for processing SKD61 steel","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"51 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140972877","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

What push students to use motorcycles? A study based on some universities in Hanoi, Vietnam 是什么促使学生使用摩托车？基于越南河内部分大学的研究

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.13

Le Thuy Linh, Nguyen Thanh Chuong

引用次数: 0

Early strength enhancement of high-volume fly ash mortar using accelerating admixtures 使用加速外加剂提高大体积粉煤灰砂浆的早期强度

Transport and Communications Science Journal Pub Date : 2024-01-15 DOI: 10.47869/tcsj.75.1.4

Hung Vu Viet, Quang Le Van

{"title":"Early strength enhancement of high-volume fly ash mortar using accelerating admixtures","authors":"Hung Vu Viet, Quang Le Van","doi":"10.47869/tcsj.75.1.4","DOIUrl":"https://doi.org/10.47869/tcsj.75.1.4","url":null,"abstract":"High-volume fly ash mortar is considered a \"green\" material, a sustainable development solution for the construction industry, in which the fly ash replacement Portland cement content is over 50%. However, this material has the major disadvantage of slow strength development, especially at an early age, which limits its applicability. To overcome the above disadvantage, the individual or combined addition of lime Ca(OH)2, silica fume, and/or accelerating admixtures including sodium thiocyanate (NaSCN), diethanolamine (DEA), and glycerol (Gly), etc. have been interested recently. In this study, to enhance the early strength of mortars with fly ash content to replace 60÷80% of Portland cement, a three-component accelerating admixture of NaSCN, DEA, and Gly (2:1:0.5 by the mass) was used with different ratios of 0.21÷0.49 % by the total powder mass, combined with a reasonable amount of lime, silica fume supplement as presented in previous research. Experimental results showed that the optimal accelerating admixture content is 0.35% by weight of powder, combined with 6% silica fume and the additional amount of lime is 5%; 10%; and 15% corresponding to mortars using fly ash of 60%; 70% and 80%, respectively to improve early strength of mortars that are suitable for structural use (R3 ≥ 13MPa, 3 days old). In addition, the influence of the additives used on the initial setting time of high-volume fly ash mortars was also discussed.","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"29 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139528944","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

Fault classification of the rolling bearing based on minimax entropy domain adaption augmented with signal generation algorithm 基于最小熵域自适应和信号生成算法的滚动轴承故障分类

Transport and Communications Science Journal Pub Date : 2024-01-15 DOI: 10.47869/tcsj.75.1.1

Phung Van Trang, Nguyen Thanh Lich

{"title":"Fault classification of the rolling bearing based on minimax entropy domain adaption augmented with signal generation algorithm","authors":"Phung Van Trang, Nguyen Thanh Lich","doi":"10.47869/tcsj.75.1.1","DOIUrl":"https://doi.org/10.47869/tcsj.75.1.1","url":null,"abstract":"Rolling bearing faults have been capturing substantial research attention as they are the root causes of malfunctions in mechatronics systems than any other factors. The detection of rolling bearing faults in the early stage is therefore a mandatory requirement demanded by reliable industrial plants. To release the dependence of diagnostic methods on human expertise and system’s understanding, this work proposes a fault classification method for rolling bearings that is based on a deep learning framework. The framework consists of a minimax entropy domain adaptation algorithm augmented with a signal generalization algorithm. The function of the signal generalization algorithm is to reduce the domain shift between training and testing datasets that are often obtained experimentally from different working conditions. The generalized signal is then represented in the form of Fourier series whose coefficients contain intrinsic information that associated with different types of bearing faults. A convolutional neural network extracts the hidden information of bearing faults buried in the Fourier coefficients and then categorises the working condition of the bearing under test. By combining the advantages of both signal processing techniques in the frequency domain and the minimax entropy domain adaptation, the novel diagnostic framework is able to detect bearing faults from different working conditions. The effectiveness of the proposed diagnostic algorithm is experimentally verified by two case studies that were prepared with different types and levels of bearing faults.","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"26 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139529296","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

Simulation of four-point bending tests for the viscoelastic fracture properties of concrete 模拟混凝土粘弹性断裂性能的四点弯曲试验

Transport and Communications Science Journal Pub Date : 2024-01-15 DOI: 10.47869/tcsj.75.1.6

Hung Tran Nam, Nga Nguyen Thi Thu

{"title":"Simulation of four-point bending tests for the viscoelastic fracture properties of concrete","authors":"Hung Tran Nam, Nga Nguyen Thi Thu","doi":"10.47869/tcsj.75.1.6","DOIUrl":"https://doi.org/10.47869/tcsj.75.1.6","url":null,"abstract":"Understanding the fracture properties of concrete, such as crack propagation behavior and fracture energy, is crucial for designing and evaluating concrete structures. Experimental results are insufficient and cannot be directly employed for a comprehensive analysis of the fracture behavior of concrete structures under load, particularly when considering concrete as viscoelastic with the presence of cracks. Recognizing the time and cost constraints of traditional experimental testing, this research leverages numerical simulations as a cost-effective alternative to determine viscoelastic material parameters. Thus, the critical evaluation of concrete fracture properties, fundamental for the design and assessment of concrete structures, is addressed. Employing a finite element method for four-point bending tests, the study systematically investigates parameters such as initial crack depth, displacement acceleration, and time step. The material properties of concrete are described using viscoelastic models. The findings provide valuable insights into crack propagation behavior and deformation characteristics, emphasizing the significant influence of the modulus of elasticity on both maximum load values and displacement. These findings contribute to a deeper understanding of the structure's response and underscore the importance of considering these parameters in similar simulations. The study highlights the importance of considering these parameters in simulations to enhance the understanding of concrete fracture behavior. The paper's contributions can extend to optimizing concrete mixtures, formulating repair strategies, and improving structural assessments. Further research is suggested to improve the accuracy of simulations and investigate material properties under various conditions.","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"102 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139530237","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

Enhancing vibration control in stay cables: a modified damping formulation with NS-HDR damper 加强留置电缆的振动控制：采用 NS-HDR 阻尼器的改良阻尼配方

Transport and Communications Science Journal Pub Date : 2024-01-15 DOI: 10.47869/tcsj.75.1.8

Le Luu Xuan, Katsuchi Hiroshi, Luong Binh Xuan, Vu Linh Ngoc, Ha Quan Van

{"title":"Enhancing vibration control in stay cables: a modified damping formulation with NS-HDR damper","authors":"Le Luu Xuan, Katsuchi Hiroshi, Luong Binh Xuan, Vu Linh Ngoc, Ha Quan Van","doi":"10.47869/tcsj.75.1.8","DOIUrl":"https://doi.org/10.47869/tcsj.75.1.8","url":null,"abstract":"Cables in cable-stayed bridges have low intrinsic damping, and dampers are often used as a countermeasure for cable vibration control. This paper presents an innovative asymptotic formula for calculating the additional damping in stay cables equipped with Negative Stiffness High Damping Rubber dampers (NS-HDR). The NS-HDR damper incorporates negative stiffness through a pre-compressed spring. The analysis employs models of flexural cables with fixed-fixed or hinged-hinged ends to derive the formulation of attainable damping ratio. The results of the study reveal that the NS-HDR damper, with its negative stiffness feature, exhibits a significantly higher added damping ratio in comparison to the conventional HDR damper configuration. To quantify this increased added damping resulting from negative stiffness, a modification factor is proposed. The accuracy and effectiveness of the proposed damping formula are successfully validated using the Finite Difference Method (FDM). Subsequently, the methodology is applied to design the damping of two existing stay cables (137.82m and 167.18m in length). Field measurements reveal that the damping in these cables falls below the required threshold of 0.5%. The proposed NS-HDR damper offers a viable solution to achieve the required damping ratio. These findings contribute significantly to the understanding and optimization of damping in stay cables employing HDR dampers, presenting potential applications in the field of bridge engineering. The research opens up new possibilities for enhancing vibration control and safety in cable-stayed bridges.","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"17 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139529182","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

Evaluating the impact of construction-induced vibration on nearby structures when building road embankment in Hanoi 评估河内路堤建设施工引起的振动对附近结构的影响

Transport and Communications Science Journal Pub Date : 2024-01-15 DOI: 10.47869/tcsj.75.1.3

Long Nguyen Ngoc, Lan Nguyen Chau, Thanh Bui Tien, Nhung Nguyen Thi Cam

引用次数: 0