FMI Compliant Approach to Investigate the Impact of Communication to Islanded Microgrid Secondary Control

In multi-master islanded microgrids, the inverter controllers need to share the signals and to coordinate, in either centralized or distributed way, in order to operate properly and to assure a good functionality of the grid. The central controller is used in centralized strategy. In distributed control, Multi-agent system (MAS) is considered to be a suitable solution for coordination of such system. However the latency and disturbance of the network may disturb the communication from central controller to local controllers or among agents or and negatively influence the grid operation. As a consequence, communication aspects need to be properly addressed during the control design and assessment. In this paper, we propose a holistic approach with co-simulation using Functional Mockup Interface (FMI) standard to validate the microgrid control system taking into account the communication network. A use-case of islanded microgrid frequency secondary control with MAS under consensus algorithm is implemented to demonstrate the impact of communication and to illustrate the proposed holistic approach.Comment: Proceedings of the IEEE PES ISGT Asia 2017 conferenc

The influences of the number of concrete dowels to shear resistance based on push out tests

To reduce the depth of floor-beam structures and to save the cost of headed-shear studs, many types of shallow composite beam have been developed during the last few years. Among them, the shallow-hollow steel beam consists of web openings, infilled with in-situ concrete (named concrete dowel) has been increasingly focused recently. In this new kind of structure, this concrete dowel plays an important role as the principal shear connector. This article presents an investigation on the shear transferring mechanism and failure behavior of the trapezoid shape concrete dowel. An experimental campaign of static push-out tests has been conducted with variability in the number of web openings (WOs). The results indicate that the mechanical behavior of concrete dowel could be divided into crushing, compression, and tension zones and exhibits brittle behavior. The longitudinal shear resistance and specimen's stiffness are strongly affected by the number of considered WO

ĐÁNH GIÁ HIỆU NĂNG TÍCH HỢP HỆ THỐNG TRÍ TUỆ NHÂN TẠO CHUYỂN VĂN BẢN THÀNH GIỌNG NÓI HỖ TRỢ SINH VIÊN KHIẾM THỊ TRONG MÔ HÌNH ĐẠI HỌC THÔNG MINH

People with disabilities have been facing difficulties and barriers in terms of inclusive education, especially at the undergraduate level. In recent years, building and applying the smart university model based on the development of science, technology, and engineering has gradually opened up learning opportunities for disabled people. This study evaluated text-to-speech systems and conducted performance experiments on the integration ability of the smart university model in order to better support visually impaired students in Vietnam’s universities. Along with this, it also showed a suitable roadmap for integrating text-to-speech artificial intelligence systems into the smart university model for Vietnam’s universities.Người khuyết tật đã và đang gặp những khó khăn và rào cản trong việc hòa nhập giáo dục, đặc biệt là giáo dục đại học. Trong những năm gần đây, việc xây dựng và ứng dụng mô hình đại học thông minh dựa trên sự phát triển của khoa học công nghệ, kỹ thuật đang dần mở ra những cơ hội học tập cho người khuyết tật. Nghiên cứu này đánh giá các hệ thống chuyển văn bản thành giọng nói và thực hiện thí nghiệm về hiệu năng tích hợp với các mô hình đại học thông minh để phát huy khả năng hỗ trợ sinh viên khiếm thị trong các trường đại học Việt Nam. Cùng với đó, nghiên cứu cũng chỉ ra lộ trình phát triển đại học thông minh tích hợp hệ thống trí tuệ nhân tạo chuyển văn bản thành giọng nói một cách phù hợp cho các trường đại học Việt Nam

Vai trò của thiết kế tổng thể trong ứng dụng tin học vào quản lí xí nghiệp

Vai trò của thiết kế tổng thể trong ứng dụng tin học vào quản lí xí nghiệp

OVERALL ASSESSMENT OF DEFORMATION AND FORCE OF DIAPHRAGM WALL JOINTS DURING THE STAGES OF DEEP EXCAVATION CONSTRUCTION

In the realm of geotechnical engineering, deep excavation projects face intricate challenges, especially concerning the stability of barrette walls, which are highly susceptible to deformation and stress at their joints. This study focuses on evaluating the deformation and force behavior of barrette wall joints at the position of greatest deformation. The Finite Element Method (FEM) is utilized to simulate the behavior of these structures under various load conditions. The Analysis of Variance (ANOVA) method is employed to statistically analyze the FEM data, assessing the impact of different factors on deformation and force distributions within the barrette wall joints. The specific objective of this study is to determine the statistical significance of the observed deformations and understand the influence of construction stages on joint integrity. This methodological synergy enhances the predictability of engineering assessments and ensures that design and construction decisions are grounded in solid empirical evidence. The study's findings emphasize the importance of precise monitoring and advanced predictive techniques to mitigate potential risks associated with deep excavations, particularly at critical joint locations. The results indicate that the deformation patterns are primarily influenced by the geometrical setup of the walls and the mechanical properties of the soils. The greatest deformations were typically observed where the wall joints experienced the highest bending moments and shear forces, conditions exacerbated by unfavorable soil mechanics and hydrostatic pressures. The clear and consistent increase in total displacement highlights the progressive destabilization of the wall as the excavation depth increases. By integrating ANOVA with FEM, this study contributes to enhancing safety and efficiency in deep excavation projects by ensuring that decisions are grounded in empirical evidence