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86 articles for “Coefficient of variation”
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Prediction of Excitation Current of Synchronous Machines Based on Neural Network Model
Abstract: There are several difficulties found to estimate the excitation current & and optimum input parameters of synchronous motors. Heuristic methods are frequently used to weightt the problem's parameters or optimum coefficients. As a result, a neural network model is modified in this study to explore the best parameters and estimate the excitation current of a synchronous motor with minimal prediction errors for both the testing dataset and cross validation. Excitation …
Published in Recent Trends in Electronics Communication Systems · Vol. 10, Issue 1, 2023 · pp. 28–33 Read article
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Analysis of Color and Particulate Depolarization Ratio Profiles for Aerosols using CALIPSO Level 2 Data
Abstract: Aerosols have an important impact on Earth’s climate system by absorbing, scattering and modifying cloud properties. There are many sources of aerosols; both natural and resulting from human activities with widely varying distribution both in space and time. In addition to aerosol columnar spatio-temporal variation, the vertical profile temporal studies provide valuable inputs to various climatic models and radiative transfer studies. This study focuses on the analysis of color ratio …
Published in Journal of Remote Sensing & GIS · Vol. 6, Issue 2, 2015 · pp. 1–5 Read article
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Impact of Barrier Thickness and Height on the Current-Voltage (I-V) Characteristics of GaAs/Ga1-xAlxAs Quantum Cascaded Laser
Abstract: Quantum Cascaded Laser (QCL) physics is different from a diode laser. In diode, laser transitions occur between the conduction band and valance band of the materials whereas in quantum-cascade laser transitions occur between states within a single quantum well. This paper presents the effect of barriers thickness on the I-V characteristics of GaAs/Ga1-xAlxAs based QCL. The calculated I-V characteristics findings predict the output current modulation capability of the proposed GaAs/Ga1-xAlxAs …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 21, Issue 1, 2019 · pp. 6–12 Read article
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Standardization of Structural and Functional Brain Integration in Cannabis Users
Abstract: Cannabis is one of the most widely used and commercialized illegal drugs worldwide, notably amid young adults. The neurobiological mechanisms of cannabis, particularly in adolescents, have yet to be identified. The purpose of the present study was to evaluate a cohort of 73 cannabis users (aged 22–36years, 19 females) and his 73 healthy controls (aged 22–36, females). We observed some momentous differences in local structural/functional network measures (such as grade …
Published in Research & Reviews: A Journal of Bioinformatics · Vol. 10, Issue 1, 2023 · pp. 1–17 Read article
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Principal Component Analysis Based Dominant Features Selection Method for Speaker Identification
Abstract: Cepstrum based features are mostly used in speaker identification. Mel-frequency cepstrum coefficients (MFCCs) and their statistical properties (skewness, kurtosis and standard deviation) are used in this paper for text-dependent speaker identification. Principal component analysis (PCA) is employed to select the dominant feature vector representing the speaker characteristics. Multi-layer neural network is used as the classification engine. There occurs the inter-speaker variation of speech length uttering the same word. The feature …
Published in Current Trends in Signal Processing · Vol. 1, Issue 1-3, 2025 · pp. 33–45 Read article
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Studies on Electrical and Thermal Transport of InN based on Two Layer Model
Abstract: InN, a material of huge potential in device applications, is grown on sapphire substrate. But due to the high lattice mismatch between the sapphire and InN, the large number of dislocations develops near the interface between the two materials. However, the density of threading dislocation falls sharply in the bulk layer. The charge density has also similar variation. Therefore, the bulk InN crystal may be treated to be consisting of …
Published in Research & Reviews : Journal of Physics · Vol. 2, Issue 2, 2013 · pp. 17–21 Read article
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Development of a Novel Analytical Framework for Investigating Non-Symmetric Deformation Behavior in Strip Rolling
Abstract: In recent years, the asymmetrical rolling process has attracted considerable research attention due to its ability to induce non-uniform deformation characteristics within metallic workpieces. In this context, the present study introduces a novel analytical framework for asymmetrical cold rolling based on an enhanced slab method, specifically designed to overcome the inherent limitations of existing analytical models when applied to a wide range of asymmetric rolling conditions. A newly developed mathematical …
Published in Journal of Experimental & Applied Mechanics · Vol. 17, Issue 1, 2026 · pp. 1–21 Read article
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The climate change analysis on water resources over western Ghat by deficit calculation method
Abstract: The objective of this work is to study the extreme hydrological events and climate change impact on water resources over western Ghat. The western ghat is spread over the area 140 thousand square kilometers and 2600 meter of average elevation. The 1600 Km long western ghat is biodiversity hotspot and home of different species it also forms the catchment which drains over one-third of India. To analyze the extreme hydrological …
Published in Journal of Water Resource Engineering and Management · Vol. 7, Issue 1, 2020 · pp. 16–35 Read article
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Design and Performance Evaluation of A Refrigeration System Utilizing The Peltier Cooling Effect
Abstract: A domestic refrigerator with 5star rating and having capacity 180 Liters consumes 265 units per year. In India average cost of electricity consumption per unit for domestic usage up to 100 units is Rs 5.31per Unit and beyond 300 units it is Rs.8.95 and for industrial it may go beyond Rs 10.45/kWh. This scenario demands for alternative cooling technology that can replace totally VCR (vapour compression refrigeration) system. This thesis …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 13, Issue 1, 2026 · pp. 34–47 Read article
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Autonomous Calibration of Medical Devices Using Synthetic Biosignals and Adaptive Learning
Abstract: The accuracy and reliability of modern biomedical diagnostic devices are critically dependent on effective calibration mechanisms capable of handling dynamic physiological and environmental variations. Conventional calibration approaches, which rely on static reference signals and manual adjustments, are inadequate in addressing challenges such as sensor drift, noise interference, motion artifacts, and long-term performance degradation. To overcome these limitations, this research proposes an innovative AI-driven adaptive biosignal simulation and calibration architecture for …
Published in Journal of Instrumentation Technology & Innovations · Vol. 16, Issue 2, 2026 Read article
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Experimental Investigation on Performance of Vapor Compression Refrigeration System using Nanorefrigerant (R134a+Al2O3) with/without Evaporative Condenser
Abstract: In traditional refrigeration system the main focus of researchers is always to improve its performance by reducing work of compression and enhancing the heat transfer rate in different heat exchangers and this can be achieved by adopting suitable technique. In this research work experiment is carried out on vapor compression refrigeration test rig using nanorefrigerant of R134a as base refrigerant and nanoparticles of aluminium oxide Al2O3 in different concentration so …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 3, 2020 · pp. 1–8 Read article
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Bonding Strength Characteristics of FRP Cylindrical Composites Under Hygrothermal Loading
Abstract: This study investigates the bonding strength characteristics and stress distribution patterns in fiber-reinforced polymer (FRP) cylindrical composites subjected to hygrothermal loading conditions. A four-phase cylindrical model incorporating AS-Graphite and S-Glass fibers with low modulus epoxy coating was analyzed under four distinct pressure loading conditions (25.984, 38.976, 77.953, and 155.906 MPa). Comprehensive stress analysis revealed significant variations in von-Mises stress, maximum principal stress, and minimum principal stress across fiber, coating, matrix, …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 950–967 Read article
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FEA Analysis for the Optimization of an Extrusion Die
Abstract: Normal 0 false false false MicrosoftInternetExplorer4 The process of extrusion plays a vital role in the production process of different parts in various environments. Even though there is lot of variations in the production of parts during extrusion with conventional processes to the latest automation in the manufacturing. There is a need to develop different die designs by varying input processes variables for the extrusion process in an optimum manner. …
Published in Trends in Mechanical Engineering & Technology · Vol. 4, Issue 1, 2014 · pp. 10–21 Read article
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Studies on Phytochemical analysis of Citrus sinensis
Abstract: Citrus sinensis, also known as sweet orange, is an extensively grown fruit with extensive nutritional and medicinal significance. The present study focussed on the phytochemical analysis of C. sinensis, aiming to identify and quantify the bioactive compounds present in its various plant parts. The investigation encompassed the extraction, isolation, and characterization of secondary metabolites, including flavonoids, alkaloids, terpenoids, phenolic compounds, and essential oils. The research employed a combination of classical …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 13, Issue 3, 2023 · pp. 9–14 Read article
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Seasonal Variation of Electric Vehicles Autonomy: Application to AC/DC Dual Voltage Operation
Abstract: In this work, a study to predict battery performance and autonomy for a dual type of electric engine, 480 VAC and 360 VDC, has been developed. The study has been conducted in vehicles of mass between 1000 and 3000 kg with battery capacity in the range of 40 to 100 kWh. The process has been simulated using reference values and modeled for specific driving conditions. The simulation has been developed …
Published in Journal of Mechatronics and Automation · Vol. 7, Issue 3, 2020 · pp. 1–15 Read article
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Unravelling the Influence of Dimensions on the Thermoelectric Properties of AHEGNR
Abstract: The thermoelectric properties of hydrogenated edge semiconductor graphene nanoribbons (GNRs) have thus far been explored in detail. The effects of varying the sizes of zigzag hydrogenated edge graphene nanoribbons (ZHEGNRs) and armchair hydrogenated edge graphene nanoribbons (AHEGNRs) in terms of their properties were investigated in this study. This was achieved via the control of the graphene nanoribbon dimensions i.e., width and length by utilizing density functional theory in Quantum Espresso, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 14, Issue 3, 2024 · pp. 45–51 Read article
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Wind Pressure Analysis on the Selected Structure Using IS 875 (Part 3) 2015 and CFD (Computational Fluid Dynamics)
Abstract: Wind-induced pressure plays a significant role in the safety and serviceability of tall buildings, slender vertical structures, and signboard hoardings. Currently, computational fluid dynamics (CFD) has become an effective supplemental tool in the analysis of the interaction of wind and structures. This paper presents a unified comparative study integrating multiple investigations various modal (ⅰ) Tall rectangular building (50 m × 50 m × 150 m), (ⅱ) Rectangular Building (18 m …
Published in Journal of Offshore Structure and Technology · Vol. 13, Issue 2, 2026 · pp. 70–80 Read article
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Geochemical Assessment and Modelling of Groundwater Arsenic with Land Surface Features in Ballia District using Satellite Data and GIS
Abstract: Normal 0 false false false EN-IN X-NONE X-NONE The study examines the spatial variation of arsenic (As) level in groundwater of deep aquifers with respect to surface elevation, slope, and water-table, in Ballia, the eastern most districts of Uttar Pradesh. Total 33 water samples from deep aquifer and their site locations were taken from the 17 blocks of the district during pre and post-monsoon seasons during 2011. Atomic absorption spectrophotometer …
Published in Journal of Remote Sensing & GIS · Vol. 6, Issue 2, 2015 · pp. 18–32 Read article
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Pathloss and Coverage Analysis of FM Signals for Terrestrial Communication Design over Akure, Nigeria
Abstract: Accurate analysis of Free Space Loss (FSL) of electromagnetic radiations plays significant roles in the design and planning of terrestrial communication system at radio wave and microwave frequencies. Hence, it remains important to continuously evaluate the dependence of radio waves signal strength on the properties of the propagating medium. This work employed drive test technique and free space loss analysis of some Frequency-Modulated (FM) channels in Akure, Ondo State, Nigeria, …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 8–21 Read article
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Study on the Profile and Flow Field Variation of Parachute Coating by Seven-hole Probe Method
Abstract: In general, the parachute test is a long test cycle, expensive, and difficult to measure with accuracy, which makes it a very laborious and time-consuming task. Therefore, attempts have been made to overcome this by using a parachute test stand or by simulation, but in our country, there is no numerical simulation of the parachute and there is no research on it. In this paper, the variation of the shape …
Published in Journal of Aerospace Engineering & Technology · Vol. 14, Issue 1, 2024 · pp. 26–37 Read article