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2nd International Conference on Mechanical and Energy Technologies, ICMET 2021

作者： Singh, Tushar Vats, Prameet Dubey, Vineet Arora, Pawan Kumar Kumar, Harish Sharma, Anuj Kumar Centre for Advanced Studies Lucknow226031 India Galgotias College of Engineering & Technology Greater Noida201310 India National Institute of Technology New Delhi110040 India

ISBN: (纸本)9789811916175

Turning operation is widely used in industries for manufacturing different kinds of products. To cope with global market in this era of globalization, industries need manufacturing processes to be economical and would give best quality products and they should have high production rate. In order to achieve these needs, machining is done at high cutting speed, high feed, and depth of cut. At these machining parameters, large amount of heat is generated and high cutting temperature is produced. This results in reduction in tool life, poor dimensional accuracy, and surface integrity of the product are reduced. Thus, it becomes essential to apply cutting fluid for improving the machining performance. Machining is performed on AISI 316 steel by use of tungsten carbide insert. Palm oil-based MQL is used as the cutting fluid. Cutting velocity, feed rate, and depth of cut are taken as input parameters. ANOVA is performed to find the most significant input parameter which affects the response. Results show that depth of cut has significant effect as cutting parameter in both the machining environment. It is found that cutting forces were reduced by 11.945% when machining with palm oil when compared with dry machining. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Turning

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Internet of Things (IOT) based Smart Nebulizer System 5

Internet of Things (IOT) based Smart Nebulizer System

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5th International Conference on Electronics and Sustainable Communication Systems, ICESC 2024

作者： Gowtham, R. Chandrasekaran, R. Harendharan, B. Inakollu, Sai Amrutha Vels Institute of Science Technology & Advanced Studies Chennai India Sri Venkateswara College of Engineering Chennai India Parul University Vadodara India

ISBN: (纸本)9798350379945

The prevalence of asthma and other respiratory diseases is increasing due to continuous inhalation of contaminated air. To address this issue, an IoT-based smart nebulizer has been developed with advanced features to aid individuals suffering from chronic pulmonary conditions. Nebulizers are typically used to deliver medication as a mist to patients with respiratory diseases. The proposed smart nebulizer incorporates a high-efficiency jet motor capable of nebulizing 500 ml of air per cycle at a rate of 15 respiratory cycles per minute. It also includes a respiration rate sensor and IoT sensors to monitor patients' respiratory flow during nebulization. This technology is physician-friendly, enabling healthcare providers to remotely set and control the nebulizer's flow rate. The developed IoT-enabled smart nebulizer utilizes Wi-Fi for data transmission and reception, allowing real-time analysis and monitoring of patients' respiratory patterns. This innovation offers a more efficient and controlled way to manage respiratory treatments. © 2024 IEEE.

关键词： Pulmonary diseases

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Management of Memory in the Real Time Data Streams 14

Management of Memory in the Real Time Data Streams

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14th International Conference on Advances in Computing, Control, and Telecommunication Technologies, ACT 2023

作者： Kavitha, N. Kalpana, Y. Kumar, V. Vels Institute of Science Technology and Advanced Studies Department of Information Technology TN Chennai India Agril. Engineering Department Agricultural College and Research Institute Tamil Nadu Madurai India

Real time data streams[11] or streaming of data has become popular in the field of Data science. Data size is growing fast and large whereas it has become challenge for the researchers and industries on managing the data. Real time analysis involves large volume of dynamic data with dynamic change in nature. Once the data is received, correctness of the data needs to be checked. Data mining[19] is the multi-disciplinary field that combines statistics, machine learning[2], Artificial intelligence[10] and database technology. The main characteristic of mining complex data streams is the huge volume of continuous incoming infinite data;the nature of the data is fast-changing and requires a fast real-time response. The data will be of multi-Dimensional. Data sets are complex in nature, main challenge lies on the unbound memory required to store the data and use the same for further analysis. This paper discusses about managing the real time data with available memory and the technologies used for handling it. © Grenze Scientific Society, 2023.

关键词： Data mining

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Transfer or blockage:Unraveling the interaction between deformation twinning and grain boundary in tantalum under shock loading with molecular dynamics

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Journal of Materials Science & technology 2023年第25期156卷 118-128页

作者： Z.C.Meng M.M.Yang A.H.Feng S.J.Qu F.Zhao L.Yang J.H.Yao Y.Yang Q.B.Fan H.Wang Interdisciplinary Centre for Additive Manufacturing (ICAM) School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai 200093China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China National Key Laboratory of Science and Technology on Materials Under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401135China

The interaction between{112}deformation twinning and grain boundary in coaxial polycrystalline tantalum under shock compression was studied with molecular dynamics simulation under different grain pair misorientation ... 详细信息

The interaction between{112}<111>deformation twinning and grain boundary in coaxial polycrystalline tantalum under shock compression was studied with molecular dynamics simulation under different grain pair misorientation angles(MA)and geometric compatibility factor(m’).Generally,in the coaxial polycrystal,the value of MA determines the occurrence of twin transfer(TT)or twin blockage(TB),i.e.,twin transfer occurs at MA≤29°with twin blockage *** TT,the value of m’affects the selection of twin variants.,i.e.,the twin system with a larger m’is easier to *** morphology of twin pairs is ruler-shaped and lenticular under TT and TB,respectively,with different thickening mechanisms,including grain boundary dislocation emission.

关键词： Plasticity Grain boundary Twin Atomistic simulation Tantalum

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Design and Implementation of MEMS-Based Gesticulation Control for Disabled People

Design and Implementation of MEMS-Based Gesticulation Contro...

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International Conference on Futuristic Communication and Network Technologies, CFCNT 2020

作者： Nivash, S. Ganesh, E.N. Chander, Racha Purna Department of ECE Vels Institute of Science Technology and Advanced Studies Chennai India Department of Electronics and Communication Engineering SRMIST Kattankulathur Chennai India

ISBN: (纸本)9789811646249

The invention in this paper aims to depict an adaptable, cost-cogent and conveyable MEMS positioned subjection ideology, for the physically disabled people with practicability and high accuracy. People do not compass time to look after their old and needy ones because of their hassle work hours. This invention helps them be absolute and recede a frontage of unessential laceration. The transmitter and receiver modules data can be cogent to keep track of instant action that can be taken. The features embedded in designing a scalable, reliable, cost-effective, and portable wireless MEMS-based device module for the physically disabled with high precision and in better functionality. The venture centers on finger movement recognition acknowledgment through displacement in various ways. Numerous methodologies utilizing camera modules and artificial intelligence to interpret sign language were in existence. Gesture recognition with sensor modules is a way for machines in depth in understanding human body language, thus building a high interface bridge and connectivity between humans and machines. Roughly 6 million people in the world face the issue of disability due to paralysis of various degrees and our aim to conquer the problems faced by them in their daily routine life. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Patents and inventions

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Triboelectric nanogenerators with a constant inherent capacitance design

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Nano Research 2023年第3期16卷 4077-4084页

作者： Lanyue Gan Fan Xia Panpan Zhang Xijun Jiang Yuxuan Liu Simiao Niu Youfan Hu Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411102China Key Laboratory for the Physics and Chemistry of Nanodevices Center for Carbon-Based ElectronicsAcademy for Advanced Interdisciplinary StudiesSchool of ElectronicsPeking UniversityBeijing 100871China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Biomedical Engineering Rutgers UniversityPiscatawayNJ 08854USA

Triboelectric nanogenerators(TENGs)utilize the phenomena of contact electrification and electrostatic induction to harvest mechanical energy from the environment.A good match between the motion frequency and the circuit characteristic frequency is critical for the effective power generation of a ***,most TENGs have a time-dependent inherent capacitance(TICTENG),which hinders an optimal design for efficient energy ***,we propose a novel structure of a TENG with a constant inherent capacitance(CIC-TENG)and a mathematical model is established to provide analytical expressions of key output parameters of the device,which gives numerical simulation results that are in good agreement with the experimentally obtained *** of merit and an optimization strategy are also given as guidelines for the optimization of material selection,geometry design,***,a disk-formed CIC-TENG(DCIC-TENG)with polarity-switched triboelectric pairs is constructed to harvest unidirectional mechanical energy continuously,achieving an output power density of 55 mW/m^(2).The effects of the motion frequency,the number of electrodes and triboelectric pairs on the charge transfer efficiency of the DCICTENG are assessed and a preferred design strategy is ***,the CIC-TENG demonstrates approximately two-fold advantages in power transfer efficiency over the TIC-TENG,and a DCIC-TENG-based self-powered anemometer was fabricated to measure wind speed in real time.

关键词： triboelectric nanogenerator inherent capacitance output power linearity

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Lead-free perovskite solar cell byUsing SCAPS-1D: Design and simulation

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Materials Today: Proceedings 2022年 62卷 4327-4331页

作者： Tripathi, Manas Vaibhav Mishra, Vipul Sengar, Brajendra S. Ullas, A.V. Centre for Advanced Studies Dr. A.P.J. Abdul Kalam Technical University Lucknow Uttar Pradesh 226031 India Department of Electronics and Communication Engineering National Institute of Technology Srinagar India

The efficiency of photovoltaic systems of perovskite materials based on organic–inorganic halide has increased and they are nearing commercialization. Lead-free perovskite materials have recently attracted the interest of researchers and the scientific community due to the toxicity issue and harmful lead-based perovskite materials. Tin, like lead (Pb) is a group 14 metals;hence, it is the most likely substitute. We use SCAPS-1D numerical simulation to optimize the device efficiency of a lead-free n-i-p based planar hetrostructure perovskite solar cell composed of intrinsic-CH3NH3SnI3 methyl ammonium tin iodide (MASnI3) as an i- and p-layer Spiro-OMeTAD with SnO2 for the n layer. Conclusions show that the absorber layer has a thickness of 600 nm, which is required for optimal cell performance and efficiency. The thickness and defect density of this absorber layer was taken into account, absorption coefficient is inversely proportional to defect density. The performance of device worsens when the defect density of absorber layer increases. The thickness and defect density of absorber layer was carefully tuned to get maximum solar cell performance and we observed an efficiency of 22.21 %, current density (JSC) of 33.8636 mA/cm2, VOC of 0.989 V and FF of 66.33 % at 600 nm thickness of absorber layer. © 2022

关键词： Perovskite

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Maximum Energy Transfer Efficiency in Solar-Powered Bilateral Dual-Stage AC to DC Converters for Vehicle-to-Home and Vehicle-to-Grid Applications 4

Maximum Energy Transfer Efficiency in Solar-Powered Bilatera...

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4th International Conference on Power, Energy, Control and Transmission Systems, ICPECTS 2024

作者： Rubavathy, S. Jaanaa Bharathiraja, M. Sasikala, K. Gomathi, S. Saveetha University Saveetha School of Engineering Simats Tamilnadu Chennai India Vels Institute of Science Technology and Advanced Studies Tamilnadu Chennai India

ISBN: (纸本)9798331508845

Transition to alternative sources of energy is essential to halting global warming and lessening its effects on biodiversity. In this research, the beneficial environmental effects of integrating powered by solar energy multiple stage bidirectional AC to DC converters in Vehicle-to-Home (V2H) and Vehicle-to-Grid (V2G) systems are investigated. By enabling efficient energy transmission between electric vehicles (EVs), the grid, and household energy systems, these converters enhance the handling of energy and long-term sustainability. Due to its simple construction and customizable properties, 2 stages isolated AC/DC converters are frequently employed in the rapidly expanding renewable energy vehicle industry. Here, we construct and assess a highly effective dual-stage in-car charger that operates effectively across a broad voltage range for both I/P and O/P. The main portion comprises PFC (power factor correction) converters with bridgeless buck-boost completely soft switching design, while the battery end converter is powered by an isolated filter-in-built direct current converter. The primary stage's principal benefit is the elimination of electromagnetic interference (EMI) caused by sudden voltage fluctuations by creating an I/p and O/P common ground. This lessens the requirement for EMI filtering in common mode. Both the common mode (CM) noise and the total leakage current are maintained at a reasonable level. Greater efficiency and power density are the main advantages of the second stage. In order to make sure the safe charging and discharging of batteries, a converter that offers controls battery current and galvanic isolation is needed. © 2024 IEEE.

关键词： Vehicle-to-grid

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High-resolution mapping of brain vasculature and its impairment in the hippocampus of Alzheimer's disease mice

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National Science Review 2019年第6期6卷 1223-1238页

作者： Xiaochuan Zhang Xianzhen Yin Jingjing Zhang Anan Li Hui Gong Qingming Luo Haiyan Zhang Zhaobing Gao Hualiang Jiang School of Pharmacy East China University of Science and Technology CAS Key Laboratory of Receptor Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology MoE Key Laboratory for Biomedical Photonics School of Engineering Sciences Huazhong University of Science and Technology Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and TechnologyShanghai Tech University

Accumulating evidence indicates the critical importance of cerebrovascular dysfunction in the pathogenesis of Alzheimer's disease(AD). However, systematic comparative studies on the precise brain vasculature of wild-type and AD model mice are still rare. Using an image-optimization method for analysing Micro-Optical Sectioning Tomography(MOST) data, we generated cross-scale whole-brain 3 D atlases that cover the entire vascular system from large vessels down to smallest capillaries at submicron resolution,for both wild-type mice and a transgenic(APP/PS1) mouse model of AD. In addition to distinct vascular patterns in different brain regions, we found that the main vessels of the molecular layer of the hippocampal dentate gyrus(DG-ml) undergo abrupt changes in both diameter and branch angle, spreading a unique comb-like pattern of capillaries. By using a quantitative analysis workflow, we identified in the hippocampus of AD mice an overall reduction of the mean vascular diameter, volume fraction and branch angle, with most significant impairment in the DG-ml. In addition, virtual endoscopy revealed irregular morphological features in the vessel lumen of the AD mice, potentially contributing to the impairment of blood flow. Our results demonstrate the capability of high-resolution cross-scale evaluation of brain vasculature and underscore the importance of studying hippocampal microcirculation for understanding AD pathogenesis.

关键词： Micro-Optical Sectioning Tomography image optimization Alzheimer’s disease impaired hippocampal vasculature virtual vascular endoscopy

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Investigation on the effects of electrical discharge machining on mild steel surface texture and its corrosion behaviour in NaCl solutions

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Materials Today: Proceedings 2023年 80卷 293-297页

作者： Kumar Tiwari, Alok Kumar Jha, Vinit Kumar Singh, Rabesh Ji, Gopal Centre for Advanced Studies U.P Lucknow- 226031 India Department of Mechanical Engineering R.R. Institute of Technology Bakshi Ka Talab U.P Lucknow 226201 India

Electrical Discharge machining (EDM) is an emerging solution for the precise machining of the commercial metals and alloys. In EDM, machining is performed by the heat input with the successive electrical spark between the electrode and work piece. Hence surface texture of the materials changes after the machining process due to this too much heat input. Thus, surface texture depends on the variation of heat input during the process. In present work, galvanized mild steel (GMS) is machined by EDM at different current values (5 A, 10 A, 15 A and 20 A) for studying the effect of heat input on the surface texture. In addition, corrosion behaviors of GMS samples machined by EDM at different currents have been studied in 0.5 M NaCl by open circuit potentials (OCP), polarization curves and electrochemical Impedance Spectroscopy (EIS). Scanning Electron Microscopy (SEM) is used to monitor the effects of corrosion and machining surface texture of GMS. The SEM, surface roughness measurements and corrosion tests confirm that the surface is becoming rougher and corrosion behavior is worsening with the increase in current. The roughness of the surface can be correlated to thickness of recast layer (measured in SEM) that is increasing with the increase in current (heat input). © 2023

关键词： Scanning electron microscopy

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