Communication systems

This study was conducted. Moreover, it is shown that choosing the best Tx/Rx parameters is necessary to meet service quality requirements such as BER and transmission confidentiality. The provided findings provide insightful information about the practical considerations of deploying UWOC/ CDMA systems.

11p viengfa 28-10-2024 3 1   Download

This paper presents a centralized monitoring and management system for communication stations in communication units. The system includes on-site monitoring and alert device located at communication stations and centralized monitoring and management software at the operating center.

11p viling 11-10-2024 1 1   Download

The study was done to estimate the incidence of malnutrition in children under 5 years old in Tu Ky district, Hai Duong Province in 2023. Subjects and Method. Subjects included 602 children under 5 years old in the study setting. The method was a cross-sectional study.

7p vibecca 01-10-2024 1 0   Download

This paper proposes an optimal methodology to place a supercapacitor energy storage system (SESS) for urban railway lines. The proposed method uses simulation tools to determine the level of renewable energy as well as the cycle of renewable energy occurrence at substations.

15p vibecca 01-10-2024 1 1   Download

Traffic control decisions for incident congestion management on expressways are often made in the face of uncertainty because it entails using many forms of both current and predicted traffic data and incident information to arrive at control decisions under critical-time pressure.

16p vibecca 01-10-2024 1 1   Download

This presentation will introduce the smart urban formation process with ideas and operational models. At the same time, we will introduce a smart city rating system based on the role of urban government and the community; thus, we will find the existing and building of the development orientation. Finally, we will present a case study to applying smart city model in Hanoi capital, Vietnam in the trend of sustainable development in the future.

8p vibecca 01-10-2024 6 2   Download

In the world, the integration of controlled weapons into combat vehicles has been done for a long time and many weapon manufacturers have utilized image processing software to enhance the combat effectiveness of weapon systems, resulting in positive outcomes.

11p vibecca 01-10-2024 1 0   Download

Recently, the application of textile-reinforced concrete (TRC) in thin-walled precast structures has gained significant attention. Among these innovations, the combination of TRC and reinforced concrete (RC) has emerged as an effective method for creating hybrid structural systems. This paper presents the experimental results analyzing the shear behavior of a hybrid deck slab structure consisting of TRC stay-in-place (SiP) formwork and RC components.

10p vibecca 01-10-2024 3 0   Download

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.

15p vibecca 01-10-2024 2 1   Download

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 data sets from 2015 to 2017 in Hanoi, Vietnam.

15p vibecca 01-10-2024 1 1   Download

In this study, the influence of injector structure and fuel injection pressure on injection mass as well as the influence of injection pressure on the development of the fuel spray are presented.

14p vibecca 01-10-2024 1 0   Download

This paper deals with the detection of rolling bearing faults based on band-pass filters and Fourier interpolation of the load torque. The reference torque, which is the output of the speed controller, is considered to be an approximation of the load torque.

15p vibecca 01-10-2024 0 0   Download

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.

15p vibecca 01-10-2024 2 1   Download

Seismic analysis of soil-structure interaction (SSI) is a challenge due to the nonlinearities of soil-foundation interaction (SFI). The reliability of the design and the analysis results will suffer if SSI is ignored. In this paper, a two-step method based on the superposition theorem is used to perform a seismic analysis of a soil-foundation-tank-liquid system (soil-liquid tank system).

13p vibecca 01-10-2024 1 1   Download

Model for energy and exergy analysis of absorption refrigeration using waste heat from textile factory has been built. The analysis that uses different models of heat exchangers are the overall heat conductance (UA) model, and the effectiveness model. The result show that the exergy loss in the generator and absorber are the larger than condenser and evaporator.

9p vibecca 01-10-2024 1 1   Download

A Knowledge-based Decision Support System (KB-DSS) based on a multi-stage Fuzzy Logic Controller (MS-FLC) is developed for traffic congestion management on expressways. In a case study, the KB-DSS is evaluated on a simulated network in comparison to ALINEA\Q, a popular ramp control method, across various traffic and incident situations.

15p vibecca 01-10-2024 3 1   Download

This study was conducted to investigate the residual of Chlorpyrifos (CPF) in coffee growing soil at Lam Ha district, Lam Dong province. Fifteen soil samples were collected from coffee intensive gardens in the Phi To, Nam Ha, Me Linh and Dong Thanh communes of Lam Ha district during the February 2023.

9p vibecca 01-10-2024 2 1   Download

The distribution network model is one of the sophisticated strategies being used in research to assess the state of household solid waste (HSW) management and calculate the quantity of greenhouse gas emissions from landfills in Nghia Ninh and Bao Ninh communes.

12p vibecca 01-10-2024 2 1   Download

This study aims to propose a concrete process of developing a KPIs system in urban planning by the logic model, and applying it for the case of the Hanoi master plan. In more detail, the logic model will be utilized to understand the plan’s components and their linkages, and then select KPIs based on the model’s outputs and outcomes, and based on Hanoi urban data availability and quality.

14p vibecca 01-10-2024 1 1   Download

The aim of the current study was to assess the effects of climate change on the people and agricultural systems in Thuong Bang La (TBL) commune, Vietnam, utilizing climatesmart agriculture rapid appraisal (CSA-RA) tools.

17p vibecca 01-10-2024 4 2   Download