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2023 International Conference on Evolutionary Algorithms and Soft Computing Techniques, EASCT 2023

作者： Panda, Harshini Sivakumar, Pradeep Kumar Vels Institute of Science Technology and Advanced Studies Electrical and Electronics Engineering Chennai India

ISBN: (纸本)9798350313413

The power generation and distribution sectors observe high-level penetration of Renewable Energy Sources (RESs) and Distributed Generators (DGs) due to several factors such as perpetual energy demand, nature of sources and load. Nevertheless, more specifically, the direct current (DC) micro grid is getting more attention over the conventional alternating current (AC) Micro rid for several benefits;for example, higher efficiency and reliability. This research work focus on three aspects the first one to design phase shift full bridge DC-DC converter with and discuss with various optimization techniques for implementing the Micro Grid. The second aspects to validate to implemented the Enthalpy Sigmoid Neuro-Fuzzy crowbar control using DFIG for power oscillation damping. The third aspects to analysis and implementation of a damping controller with renewable energy sources. The advantages and disadvantages of different protection and planning approaches are explained in detail. The effectiveness for the proposed strategy is proved. © 2023 IEEE.

关键词： Damping DFIG Enthalpy sigmoid neuro fuzzy Micrgrid Neurofuzzy crowbar

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Design of a Intelligent Crutch Tool for Elders 1st

Design of a Intelligent Crutch Tool for Elders

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1st EAI International Conference on Intelligent Systems and Machine Learning, ICISML 2022

作者： Dhivya, A. Josephin Arockia Hemalatha, R.J. Department of Biomedical Engineering Vels Institute of Science Technology and Advanced Studies Chennai India

ISBN: (纸本)9783031350801

In the last few years physiotherapists has been treating the individuals by taking their decisions quickly which results in complexity, non effective and decrease in recovery rate in rehabilitation. Walking aids play a vital role in helping the patients in certain conditions, they lack balance and leads to complex usage of device. These type of aids helps for individuals suffering from spondylitis, disc bulging and postural In this proposed system we design a solution for patient using walkers, this device helps them to maintain the proper balance. As a proof of concept, we develop a sensors-based solution which can be easily embed where the walker helps to get real time information of the subject and helps in recovery rate. This device will automatically warn the users when they apply more pressure on a sensor using haptic feedback. To design a smart crutch tool for Elders and Accident patients which balances the force applied in terms of stress and strain to warn the patients by means of haptic feedback. © 2023, ICST institute for Computer Sciences, Social Informatics and Telecommunications engineering.

关键词： Liquid crystal displays

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3D Fast Fourier Transform Analysis for the Detection of Alzheimer's Disease in MRI Images 10

3D Fast Fourier Transform Analysis for the Detection of Alzh...

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10th International Conference on Biosignals, Images and Instrumentation, ICBSII 2024

作者： Thamizhvani, T.R. Hemalatha, R.J. Technology and Advanced Studies Department of Biomedical Engineering Vels Institute of Science Chennai India

ISBN: (纸本)9798350350951

Fast Fourier Transform (FFT) is the transform used for the determination of the frequency domain features and description of the signal or image. The frequency components of the images are analyzed using the FFT techniques in image processing. In the study, Three-dimensional FFT features are analyzed to diagnose Alzheimer's Disease (AD) at early stages. The medical images are obtained from the standardized database which is acquired using Magnetic resonance Imaging (MRI). MRI images of different AD stages are acquired. Fast Fourier Transform is applied to three-dimensional spatial images in MRI to analyze the frequency components in each domain. Different features like r-Value, Phi, Theta, Spectral coefficients, and Fourier coefficients. The significant feature difference between the two types of 3D MRI images is analyzed using statistical techniques. Thus, the FFT features possess a high efficiency in the detection of Alzheimer's Disease. © 2024 IEEE.

关键词： Fast Fourier transforms

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Computer-Assisted Diagnostic Tool Package for Real-Time Analysis of Skin Disorder 3

Computer-Assisted Diagnostic Tool Package for Real-Time Anal...

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3rd IEEE International Conference on Mobile Networks and Wireless Communications, ICMNWC 2023

作者： Thamizhvani, T.R. Prawin, M.N. Narendra Kumar, S. Vels Institute of Science Technology and Advanced Studies Department of Biomedical Engineering Chennai India

ISBN: (纸本)9798350317022

Skin cancer constitutes one of the most common types of cancer, and according to the World Health Organization, one in five people will develop skin cancer before the age of 70. More than 3.5 million new cases occur annually in the USA, and that number continues to rise. The crucial point for treating skin cancer is early and accurate detection. For this purpose, a standalone diagnostic software tool package with a computer-aided effective system and a real-time classifier using machine learning and deep learning algorithms to classify the skin disorders based on their physiological features through A(asymmetry), B(boundary), C(color), D(diameter) which is deployed in this tool. A combined model of learning algorithms is defined for the detection of different skin disorders to improve efficiency. Thus, a software tool package with systemic learning algorithms of 98% efficiency is developed for the detection of different skin disorders. © 2023 IEEE.

关键词： deep learning machine learning physiological parameters skin cancer Software package

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Drilling parameter analysis of hybrid composites (Al/B4C/graphite) using grey relational and Taguchi techniques

Drilling parameter analysis of hybrid composites (Al/B4C/gra...

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作者： Senthil babu, S. Dhanasekaran, C. Department of Mechanical Engineering VELS Institute of Science Technology and Advanced Studies Chennai India

Application of composite materials has been increasing worldwide especially in production industries. In drilling operation, standard of hole is the basic demand in numerous applications. The choice of optimized drilling parameters is extremely vital for good hole quality. Our objective is to optimize the parameters involved in drilling of aluminium /boron carbide/ graphite hybrid composite materials to get good quality holes. A series of drilling experiments are conducted in CNC machining centre on the hybrid composite specimen slabs of size 100 mm × 100 mm × 10 mm, made-up by stir casting technique. Our work is to analyse the consequences of drilling parameters like spindle speed, feed and drill tool diameter on thrust force, torque, surface roughness and roundness error. The experimental results are collected individually on L27 orthogonal array and analysed by Signal – Noise (S/N) quantitative relation and grey rational analysis with an objective to optimize the drilling parameters to reveal the dominant factors that have an effect on the responses mentioned. © 2022

关键词： Surface roughness

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SGLSim: tool for smart glazing energy performance analysis

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Energy Informatics 2022年第4期5卷 40页

作者： Raihan, Md Anam Chattopadhyay, Kuntal Bhatia, Aviruch Garg, Vishal Hussain, Aftab M. International Institute of Information Technology Hyderabad500032 India Department of Sustainable Engineering TERI School of Advanced Studies New Delhi110070 India International Institute of Information Technology Hyderabad500032 India

A tool Smart Glazing Simulator (SGLSim), has been developed to perform parametric simulation analysis of different window systems with several window-to-wall ratios and orientations to compute and compare the annual energy performance. The net annual energy performance of the building is based on the electricity consumption in heating, cooling, interior lighting, and appliances, along with the electricity generation by the photovoltaic (PV) glazing, which is used to evaluate the energy performance of smart glazing. Performing parametric energy simulations and calculating the net annual electricity consumption of different combinations requires building modeling and energy simulation expertise. A web-based parametric tool can assist the user in carrying out the desired studies without requiring extensive technical knowledge. A case study is prepared for India’s warm and humid climatic zone. This study examines the benefits of double pane semi-transparent photovoltaics (STPV) glazing, STPV glazing with dynamic internal blind, and electrochromic (EC) glazing over other traditional glazing systems. The study shows that the optimal net annual electricity consumption in the case of STPV windows is 10–12% less than the optimal value obtained in a simple glazing case. Additionally, the result suggested that glare-controlled interior blinds in the STPV window further reduce the net annual electricity consumption by up to 15% compared to conventional glazing. Similarly, installing the EC glazing reduces the yearly electricity consumption by up to 5% compared to standard glazing. © 2022, The Author(s).

关键词： Energy efficiency

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Decoding Chemo-Mechanical Failure Mechanisms of Solid-State Lithium Metal Battery Under Low Stack Pressure via Optical Fiber Sensors

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advanced Materials 2025年 e2417770页

作者： Li, Guocheng Zhang, Taolue Tang, Jiayue Liu, Mingtao Xie, Yizhan Yu, Jingya Hui, Xiaobin Deng, Canbin Lu, Xibin Kim, Yoonseob Huang, Jiaqiang Xu, Zheng-Long Research Center for Deep Space Explorations Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hung Hom 999077 Hong Kong Sustainable Energy and Environment Thrust and Guangzhou Municipal Key Laboratory of Materials Informatics The Hong Kong University of Science and Technology (Guangzhou) Guangdong 511400 China College of Chemistry and Environmental Engineering Yangtze University Jingzhou 434000 China Academy of Interdisciplinary Studies The Hong Kong University of Science and Technology Clear Water Bay Kowloon 999077 Hong Kong Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Kowloon 999077 Hong Kong HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute Futian Guangdong Shenzhen 518045 China Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Hung Hom 999077 Hong Kong

All solid-state lithium (Li) metal batteries (ASSLBs) using ceramic-polymer hybrid solid electrolytes hold the promise for high-performance energy storage application, but they still suffer from the interfacial deterioration and dendritic Li penetration issues, particularly under low stack pressures. Therefore, understanding and mastering the underlying chemo-mechanical failure mechanisms become essential. Herein, the chemo-mechanical evolutions by operando monitoring the amplitude and heterogeneity of interfacial stress through an embedded optical fiber sensor are revealed. It is found that the uneven stripping/deposition of Li metal induces rapid and non-uniform stress growth at the interface, deteriorating interfacial contact with the Li-filament growth. Based on these insights, Li metal is replaced with an architectural lithium-tin anode, which demonstrates uniform stress and improved performance even under low stack pressure. This work not only offers a quantitative way to operando track the uniformity of interfacial stress but also provides critical insights into mastering the chemo-mechanics of ASSLBs. © 2025 The Author(s). advanced Materials published by Wiley-VCH GmbH.

关键词： electrochemical performance interfacial evolution lithium–tin alloy optical fiber sensing solid state battery

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A critical literature review on minimization of material wastes in construction projects

A critical literature review on minimization of material was...

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International Conference on Newer trends and Innovations in Mechanical engineering, ICONTIME 2020

作者： Janani, R. Lalithambigai, N. Department of Civil Engineering School of Engineering Vels Institute of Science Technology and Advanced Studies Tamilnadu India

Advancement of waste materials has a noteworthy effect at nature. Development of waste materials has a significant impact at the environment. With the requests in forcing essential foundation extends in India, altogether with numerous business and lodging programs, there are huge amount of creation is produced from the development mechanical and industrial zone Hence, the waste generated from the sites must be well dumped. For this, the waste minimization plans is the better way to reduce the waste getting from the sites. Wastage in creation tasks results super monetary and managerial setbacks to owners and contractors. Not simplest the wastage creates these problems;it also adversely impacts the surroundings very badly. These wastes have to be managed in addition to their influences desires to be nicely studied,as a result we are able to manage the waste technology and powerful utilization may be stepped forward. Whatever the affects over the surroundings and fitness in many cities of India the generation of wastes from the industry is controlled in a terrible manner say no proper planning and management. In this studies planning, discussing the method for the control and effective utilization of waste construction materials can be discussed. © 2020 Elsevier Ltd. All rights reserved.

关键词： Conservation

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Investigation on the response parameters in electric discharge machining of developed aluminium metal matrix composites

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Materials Today: Proceedings 2022年 68卷 1214-1218页

作者： Hemadri, Kadapa Ajith Arul Daniel, S. Parthiban, A. Vinod kumar, T. Department of Mechanical Engineering Sri Venkateswara Institute of Science and Technology Andhra Pradesh Kadapa 516003 India Department of Mechanical Engineering Vels Institute of Science Technology & Advanced Studies Tamil Nadu Chennai 600117 India

The present research work shows the influence on process parameters of electric discharge machining in newly developed aluminium composites. The Molybdenum Disulphide (MoS2) particulate was added in various proportions of 2%, 4% and 6% on mass fraction and also added Tungsten carbide particulates at 3%, 6% and 9%.The prepared samples were fabricated through stir casting technique. On the response parameter of MRR, Machining timing, and surface roughness, pulse on time, pulse off time, and gap voltage (Ra). According to the findings of the experiments, the best surface finish and machining time was achieved by using a moderate level pulse on time, a higher level pulse off time, and a smaller gap voltage. MRR was achieved by using a relatively low level pulse on time, maximum pulse off time and a medium voltage. © 2022

关键词： Sulfur compounds

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Multifunctional MgF_2/Polydopamine Coating on Mg Alloy for Vascular Stent Application

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Journal of Materials Science & technology 2015年第7期31卷 733-743页

作者： Xiaoli Liu Zhen Zhen Jing Liu Tingfei Xi Yudong Zheng Shaokang Guan Yufeng Zheng Yan Cheng School of Materials Science and Technology University of Science and Technology Beijing Center for Biomedical Materials and Tissue Engineering Academy for Advanced Interdisciplinary StudiesPeking University Shenzhen Research Institute Peking University Materials Research Center School of Materials Science and EngineeringZhengzhou University

Mg alloy is of great potential in the application of vascular stent due to its degradation in physical environment and proper mechanical property. However its mechanical integrity does not meet the clinical requirement clue to relatively fast degradation. Besides, in order to accelerate the re- endothelialization of Mg-based stents, it needs surface modification to improve the attachment, growth and adhesion of endothelial cells （ECs）. To solve the main obstacles, an anti-corrosion and quick endothelialization coating was prepared on novel Mg-Zn-Y-Ncl alloy via a simple two-step immersion method in the present study, first in hydrofluoric acid （HF） then in dopamine tris-Hydrochloric acid （tris -HCI） solution. The coating was uniform and thin, which consisted of two layers--the upper was pol- yclopamine （PDA） layer and the lower was MgF2 layer. The alloy with the coating demonstrated dramatic corrosion resistance enhancement in vitro by immersion test and electrochemical test. Moreover the HF- PDA-treated Mg alloy exhibited great performance of cell adhesion and proliferation. The coating created a favorable environment for ECs to have a competitive advantage over vascular smooth muscle ceils （VSMCs）, which was preferable for re-enclothelialization. The results suggest that HF-PDA-treatecl Mg -Zn-Y-Nd alloy has great potential in the application of vascular stent and the surface coating method is of great aPPlication value in biodegraclable Mg alloy stent clue to its simplicity and effectiveness.

关键词： Mg-Zn-Y-Nd alloyVascular stentHF converted layerPolydopamineCorrosion resistanceRe-endotheliazation

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