Transport and Communications Science Journal最新文献_第3页

Study on the applicability of free water surface wetland (fws) scale of wastewater treatment laboratory for green rest stops 绿色休息站废水处理实验室自由水面湿地 (fws) 规模的适用性研究

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.17

Hanh Vu Kim, Thao Vu Phuong

{"title":"Study on the applicability of free water surface wetland (fws) scale of wastewater treatment laboratory for green rest stops","authors":"Hanh Vu Kim, Thao Vu Phuong","doi":"10.47869/tcsj.75.4.17","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.17","url":null,"abstract":"The Free Water Surface wetland (FWS) has emerged as a promising technological solution for wastewater treatment in natural environments. The study aimed at investigating the performance of a laboratory-scale Free Water Surface wetland (FWS) unit designed to treat domestic wastewater with a daily capacity of 20 liters. This model can be applied at some rest stops towards creating \"Green Rest Stops\" on highways. The laboratory experiments on bronze banana plants have shown that the model operates effectively under specific settings and with the characteristics of residential wastewater from public toilets, which has undergone pretreatment through septic tanks. These conditions are conducive to promoting healthy growth in the plants. The FWS model for cultivating canna hybrid plants (Canna generalis) has a total surface area of 0.26 square meters and operates based on the principles of free wastewater flow. The model has a water retention duration of 70 hours, approximately three days. The treatment efficiency for TSS, BOD5, NH4+ - N, and Coliform is 37-53%, 73-77%, 41-46%, and 37-54%, respectively. The treated wastewater complies with the National technical regulations on water quality, QCVN 14:2008/BTNMT (B) standards","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"62 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973077","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

Real-time estimation of vehicle inertia parameters based on Kalman-bucy filter 基于卡尔曼-布基滤波器的车辆惯性参数实时估算

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.10

Anh Nguyen Tuan

引用次数: 0

Validation of stamper device to measure international roughness index IRI 验证用于测量国际粗糙度指数 IRI 的压痕装置

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.8

Hien Phan Thi Thu, Hanh Nguyen Thi Hong, Kien Pham Hoang

引用次数: 0

A case study on scenario-based optimization for axle load survey data selection for flexible pavement design in Vietnam 基于场景优化的越南柔性路面设计轴载调查数据选择案例研究

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.7

Quy Le Xuan, Dung Chu Tien, Anh Vu Tuan

{"title":"A case study on scenario-based optimization for axle load survey data selection for flexible pavement design in Vietnam","authors":"Quy Le Xuan, Dung Chu Tien, Anh Vu Tuan","doi":"10.47869/tcsj.75.4.7","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.7","url":null,"abstract":"The unique traffic patterns in Vietnam, characterized by a mix of vehicle types, axle configurations, and overloading, pose challenges to current flexible pavement design methods. This study investigates how selecting different vehicle axle load survey data scenarios impacts the accuracy of pavement design and rehabilitation for roads in Vietnam. Evaluation of various data selection methods and their influence on pavement response using the current flexible pavement calculation procedure in Vietnam. By comparing the pavement design criteria calculated under each scenario, this research aims to provide clear guidelines for engineers choosing appropriate axle load data for pavement design. This, in turn, will lead to the design and maintenance of more durable and sustainable pavements, ultimately promoting a more efficient and resilient transportation infrastructure in Vietnam. The research approach involves analyzing various axle load survey data scenarios, including those representing typical traffic conditions, overloaded vehicles, and specific vehicle types. The calculated pavement responses under each scenario are then compared to assess the impact of data selection on design outcomes. This study's findings are expected to provide valuable insights for pavement engineers in Vietnam, enabling them to select appropriate axle load data for accurate pavement design and rehabilitation. This will contribute to building more durable and sustainable road infrastructure, resulting in a more efficient and resilient transportation network","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"141 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976772","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

Applications of satellite data for rapid inundation assessment - A case study in Thua Thien Hue province 卫星数据在快速淹没评估中的应用--顺化省案例研究

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.18

Binh Hoang Nam, Nghi Le Van, Huy Hoang Vu

引用次数: 0

Applying a two-step cluster algorithm in traffic accident data analysis 在交通事故数据分析中应用两步聚类算法

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.16

Le Khanh Giang, Huong Ho Thi Lan, Do Van Manh, Tran Quang Hoc

{"title":"Applying a two-step cluster algorithm in traffic accident data analysis","authors":"Le Khanh Giang, Huong Ho Thi Lan, Do Van Manh, Tran Quang Hoc","doi":"10.47869/tcsj.75.4.16","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.16","url":null,"abstract":"Cluster analysis is often employed as the initial stage in organizing heterogeneous data into homogeneous groups. Choosing an effective clustering approach and an ideal number of clusters in a traffic accident dataset might be complex and challenging. This study aims to evaluate the effectiveness of k-means and two-step cluster methods. Subsequently, the two-step cluster method and GIS are applied to analyze the traffic accident datasets from 2015 to 2017 in Hanoi, Vietnam. First, according to the Silhouette score, the two-step cluster method achieved a higher score of 0.563, while the k-means method scored 0.341. A higher Silhouette score indicates more well-defined clusters. Second, the research suggests combining the two-step cluster method with GIS for analyzing traffic accident datasets. The outcome identifies five typical types of accidents in Hanoi. In addition, the locations of various accident types were visually illustrated on a map, enabling traffic officials to recommend precise and urgent countermeasures. Importantly, the clustering results reveal that the two-step cluster method exhibits a significantly higher rate of homogeneous data in the clusters compared to the k-means method. This study demonstrates that the two-step cluster method is not only more effective than the k-means method in terms of clustering ability but also in data pre-processing. The study's results enable authorities to gain a more detailed understanding of typical traffic accident patterns in Hanoi. Besides, the employed methods could potentially be applied to other regions, providing an additional avenue for analysis","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"32 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974170","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

Implement quantum random number generation on the IBM quantum computer platform 在 IBM 量子计算机平台上实现量子随机数生成

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.14

Luc Nhu Quynh, Le Van Anh

引用次数: 0

Nonlinear interfacial contact laws in multi-layer elastic-viscoelastic structural systems 多层弹性-粘弹性结构系统中的非线性界面接触定律

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.5

Hung Tran Nam, Nga Nguyen Thi Thu

{"title":"Nonlinear interfacial contact laws in multi-layer elastic-viscoelastic structural systems","authors":"Hung Tran Nam, Nga Nguyen Thi Thu","doi":"10.47869/tcsj.75.4.5","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.5","url":null,"abstract":"Layered structures are widely used in construction, such as pavement structures consisting of multiple layers of different materials or interfaces between bricks and mortar in masonry structures, etc. In analyzing such structures, understanding the properties of the interface between two layers of materials is essential. If one layer of material contains cracks and layers exhibit viscoelastic behavior, determining the properties of the interface becomes challenging. This study proposes a constitutive mechanical law to model the behavior of the interface between a microcracked viscoelastic medium and an undamaged elastic body based on the homogenization method. The interface is modeled by a layer of zero thickness. The coupling between the homogenization technique and the Griffith’s theory is used to provide the effective behavior of the micro-cracked medium. The interface is modelled as an effective medium (EF) characterized by normal and tangential stiffnesses (CN, CT ). In this work, two viscoelastic models are considered, i.e., Burger and Modified Maxwell. The formulas of CN and CT for two cases of crack distributions (isotropic and transversely isotropic) are obtained by asymptotic techniques where the thickness of the joint tends to zero","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"48 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974965","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 study on the capacity assessment of turbo roundabouts and the applicability in Vietnam 关于涡轮环岛通行能力评估及在越南的适用性的研究

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.6

Hung Nguyen Van, Tan Dang Minh

{"title":"A study on the capacity assessment of turbo roundabouts and the applicability in Vietnam","authors":"Hung Nguyen Van, Tan Dang Minh","doi":"10.47869/tcsj.75.4.6","DOIUrl":"https://doi.org/10.47869/tcsj.75.4.6","url":null,"abstract":"A turbo roundabout (or Turbine) is an improvement from conventional roundabouts with lanes running in a spiral shape, helping vehicles to enter the intersection smoothly and eliminate conflicts, reducing traffic congestion as well as the risk of traffic accidents. The turbo roundabout is a modern intersection, newly developed around 1996, initially in the Netherlands, then expanded to many European countries, Russia, and North America. In Vietnam, this type of intersection is still a novelty and requires more scientific exploration. Based on research from developed countries and through the use of Vissim traffic simulation software, the paper presents an analysis and evaluation of the effectiveness of Turbo roundabouts compared to conventional roundabouts. The study also proposed and developed shifted exponential models, capable of well describing the nonlinear relationship between capacity of entry roadway with circular flow. Results show that the turbo roundabout is a potential solution for Vietnamese traffic. The study's evaluation using a basic layout of a two-lane turbo roundabout with only automobile traffic composition limits its applicability to mixed traffic environments. Initially, the study proposes the installation of turbo roundabouts on access roads of freeways, or motor highways with low-to-medium traffic volume","PeriodicalId":235443,"journal":{"name":"Transport and Communications Science Journal","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976001","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

Performance evaluation of bus stops on arterial roads in Hanoi city 河内市主干道公交站点性能评估

Transport and Communications Science Journal Pub Date : 2024-05-15 DOI: 10.47869/tcsj.75.4.9

Duong Tran Khac

引用次数: 0