Search
379 articles for “Frequency analysis”
-
Flood Frequency Analysis of Big Akaki River, Awash Basin, Ethiopia
Abstract: Flood is one of the most dangerous naturally occurring catastrophic hazards now days displacing and killing people and destroying properties. During high flow, the Big Akaki River flooded the vicinity of the area and causes loss of cultivated land and life. Flood water inundates the floodplain areas and cause vast damages to life and property. The main objective of this paper is to analyze the inundation area along the Big …
Published in Journal of Water Resource Engineering and Management · Vol. 8, Issue 2, 2021 · pp. 35–48 Read article
-
Influence of Polymeric Materials on Osseointegration and Stability of Dental Implants: An In-vivo Resonance Frequency Analysis
Abstract: Osseointegration, the successful integration of dental implants with surrounding bone tissue, is crucial for long-term implant stability. Resonance frequency analysis (RFA) provides a valuable tool for assessing implant stability. This in-vivo study investigates the potential role of polymeric materials used in dental implants, such as surface coatings or membranes, in influencing osseointegration and RFA-measured stability. By analysing the impact of these polymers on factors like cell adhesion, proliferation, and differentiation …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 1051–1057 Read article
-
Assessment of Acoustic Noise Generated from Machines in a Mechanical Workshop Using 1-Octave Band Frequency Analysis
Abstract: Acoustic noise is one of the prominent occupational health hazards, particularly in manufacturing and process industries. Prolonged exposure to loud noise can cause noise induced hearing loss of the exposed personnel. Limiting the exposure to noise intensity within its permissible exposure limit is adopted as one of the administrative control measures to reduce the risk of hearing loss. However, frequency specific assessment of occupational noise exposure is limited. Here, we …
Published in Journal of Industrial Safety Engineering · Vol. 8, Issue 1, 2021 · pp. 10–14 Read article
-
Natural Frequency Analysis of Polymer Composites
Abstract: Polymer composite materials are increasingly utilized in vibration-sensitive engineering applications due to their high strength-to-weight ratio, design flexibility, and tailorable dynamic properties. Among these properties, natural frequency plays a crucial role in determining structural stability, resonance avoidance, and dynamic performance. This review presents a comprehensive synthesis of recent research on the natural frequency characteristics of polymer composite structures, with emphasis on material properties, structural configurations, boundary conditions, damage effects, environmental …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 541–553 Read article
-
Intercomparison of Parameter Estimation Methods of EVI Distribution for Rainfall Frequency Analysis
Abstract: For planning, design and management of civil and hydraulic structures, estimation of extreme rainfall for a given return period is considered as one of the important parameters. This can be achieved through Extreme Value Analysis (EVA) by fitting of Extreme Value Type-I (EVI) distribution to the observed data. In this paper, a comparative study on determination of parameters of EVI distribution by eight different methods such as graphical method, method …
Published in Journal of Water Resource Engineering and Management · Vol. 7, Issue 3, 2020 · pp. 1–13 Read article
-
Employing Sweep Frequency Response Analysis for Diagnosing Condition of Power Transformer
Abstract: The power transformer being very expensive plays a tectonic role in power system. Reliability is apogee in power system. Any failure fringing power transformer may lead to substantial monetary loss depending on how much duration it is out of service. On-line monitoring and prognosis of power transformer helps the associated delegate to take decision on subject of maintenance, replacement or continuity of its operation. From accessible vivid methods for condition …
Published in Trends in Electrical Engineering · Vol. 6, Issue 3, 2016 · pp. 26–31 Read article
-
A Contribution to the Frequency and Transient Analysis of High Voltage Bushings
Abstract: The paper suggests a method for determining the frequency characteristics and transient response of capacitively graded high voltage bushings. It is based on an s-domain circuit model that describes the grading conducting foils and the insulating layers. In most cases, they are of different axial lengths. A system of simultaneous differential and algebraic equations is derived taking these differences into account. Its closed-form solution, subject to the boundary conditions, can …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 1, 2019 · pp. 15–26 Read article
-
Vibration Mechanics of Hybrid Al 5083/SiCp/Fly Ash Composite Plates for its Use in Dynamic Structures
Abstract: Metal Matrix composites are a unique class of materials, with specific characteristics. The selection of reinforcement phase for reinforcing the metal matrix depends on many parameters and is a major concern, Silicon carbide particulates (SiCp) enhances the hardness of specimens but on the other hand it induces brittleness in the specimen which is of major concern, henceforth fly ash particulates are thought of as an alternative reinforcement for improving the …
Published in Journal of Experimental & Applied Mechanics · Vol. 8, Issue 1, 2017 · pp. 11–18 Read article
-
A Seismic Analysis of R.C. Structures Under Tuned Mass Damper System.
Abstract: A Seismic Analysis of R.C. Structures Under Tuned Mass Damper System treats seismic force reduction of multi-storey buildings using embedded dampers. tuned mass damper is investigated. Dynamic analysis was carried out using Etabs to obtain the damped and undamped responses of the structure in terms of deflections at all storeys in order to evaluate the effectiveness of the damping system to reduce the seismic response. The earthquake zone v used …
Published in Journal of Structural Engineering and Management · Vol. 6, Issue 1, 2019 · pp. 28–36 Read article
-
Study and Performance Analysis of Orthogonal Frequency Division Multiplexing with Different Modulation for Rayleigh Channel Model
Abstract: AbstractFor the advancement of wireless communication systems, methods such as MIMO, OFDM and integrating them together as MIMO-OFDM are very useful. OFDM is used in numerous wireless transmission standards nowadays. In OFDM, high rate data stream is divided into low-rate streams which are transmitted together over a number of subcarriers. A broadband and frequency-selective channel are transformed into a multiplicity of parallel narrow-band single channels by the OFDM modulation. By …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 76–80 Read article
-
Analysis of Natural Frequency for Three-Dimensional Model of Transformer Winding Using FEA
Abstract: AbstractPower transfer winding is prone to a number of events of a short circuit. However, over a period of time, capabilities of winding to withstand forces generated during such events decrease. In order to understand the behavior of winding at excitation, study of natural frequency is an important parameter. In this paper, winding’s radial and axial modes are studied with the help of finite element approach. Three-dimensional (3D) and two-dimensional …
Published in Journal of Instrumentation Technology & Innovations · Vol. 8, Issue 1, 2018 · pp. 8–12 Read article
-
Performance Analysis of Carrier Frequency Offset (CFO) and Phase Noise in 4G Communication System
Abstract: For telecommunication services the dramatic shift in the market has been made in beginning of 21st century. In these days' communication network the key challenges is to integrate numerous serves, convey the additional data as expeditiously as doable through limited bandwidth and providing high information data rates. For 4G communication systems 3GPP introduced two features Higher Order Modulation and Multiple Input Multiple Output (MIMO) in OFDM system but one limiting …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 3, Issue 1, 2016 · pp. 33–46 Read article
-
Comparative Analysis of Phase Frequency Detector for Phase-Locked Loops
Abstract: This paper presents phase frequency detector using different gates like AND, NOR and NAND and comparative simulation result analysis is carried out. The simulation is carried out using 0.18 μm CMOS process technology with supply voltage 1.8 V. NAND based PFD has lowest power consumption then other and it is 4.2587 µW at 1 GHz Frequency and dead zone to 18 ps which means having approximately zero dead zone problem. …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 1, 2017 · pp. 18–28 Read article
-
Simulation And Analysis of Radio Frequency Energy Harvesting System Operating at 2.45 GHz Frequency
Abstract: — This paper proposed study of an RF energy harvesting system at 2.45 GHz using a rectifier and an antenna so called rectenna. Inset-fed micro-strip rectangular patch antenna array is fabricated. The rectifier circuit, employing Schottky diodes (HSMS-2850), converts AC power from the antenna to DC for RF detection. Analysis of the antenna's design and parameters such as directivity, return loss, gain, and VSWR is done using high-frequency simulator software …
Published in Journal of Microwave Engineering and Technologies · Vol. 11, Issue 1, 2024 · pp. 7–15 Read article
-
PI and Fuzzy Logic Controller Based Analysis of Load Frequency Control for Thermal-nuclear Hybrid Energy Systems
Abstract: In this paper a two-area system: area-1, which has a thermal power plant, and area-2, which contains a nuclear power plant. By combining these domains, two area thermal-nuclear systems are developed in the MATLAB Simulink framework. To ensure the quality of power generated and to feed the load, generation should be raised in tandem with the growth in load demand, or the network should be connected. Using various controllers, LFC …
Published in Trends in Electrical Engineering · Vol. 14, Issue 1, 2024 · pp. 1–9 Read article
-
Analysis and Design of Frequency Reconfigurable Microstrip Patch Antenna using PIN Diode
Abstract: A reconfigurable antenna provides modify dynamically its frequency and radiation properties, which will provides the intentional redistribution of the RF currents over the antenna surface. Also this type of antennas provides the dynamical response. The difference between the smart antennas is its lies inside the antenna rather than in an external beamforming network. The proposed structure was simulated by using the High Frequency Structure Software (HFSS) version 15.0. The simulated …
Published in Journal of Mechatronics and Automation · Vol. 5, Issue 1, 2018 · pp. 17–23 Read article
-
The Transient Performance of Power Line Towers
Abstract: This paper presents a refined approach to the transient analysis of power line towers. Each section of the tower’s steel structure is accurately modeled as a non-uniform transmission line. Among other features, an efficient representation of the towers’ cross-arms as open-ended non-uniform lines and their subsequent approximation by lumped capacitors will be explored. Furthermore, the error introduced by neglecting the presence of the cross-arms, as well as the effect of …
Published in Trends in Electrical Engineering · Vol. 3, Issue 2, 2013 · pp. 20–28 Read article
-
Numerical and Experimental Modal Analysis of Square Sheets of Low Carbon Steel Under Different Boundary Conditions
Abstract: Dynamic analysis of square plates has been a subject of fundamental research interest over several decades. In these analyses, several dynamic aspects such as modal frequencies, occurrence of harmonics, mode shapes, displacement pattern of position vector, location of maximum displacement and damping characteristics are studied which provide critical inputs for structural design engineers. In this paper, a detailed modal analysis (both modal frequencies and mode shapes) of low carbon steel …
Published in Journal of Experimental & Applied Mechanics · Vol. 14, Issue 2, 2023 · pp. 15–22 Read article
-
Design and Analysis of Automobile Hood
Abstract: Bonnet is a main component of front portion of a car one which is used for many purposes. It is usedto decorate the car and add luxurious look. Bonnet is made in aerodynamic shape to reduce airresistance. Bonnet generally used to cover car engine. Therefore, the bonnet system is an accesspanel to the engine compartment to enable maintenance of power train, drive belts, battery, fluidlevels and lamp units, and it …
Published in Journal of Production Research & Management · Vol. 11, Issue 1, 2021 · pp. 42–52 Read article
-
Modelling of Spot Weld Features Using Solid Works and Experimental Modal Analysis of Resistance Spot Welded Thin Sheets of Low Carbon Steel Panels
Abstract: Resistance Spot Welding of thin (RSW) low carbon steel sheets are widely used in automotive, aero-space sectors, furniture, medical equipments, packaging and electronics industries. Although, RSW is well established for low thickness sheets and static design guidelines are well defined, the dynamic analysis of spot welded panels has not been studied in detail. In this paper, solid modeling is done using Solid Works incorporating all the spot weld geometrical features …
Published in Trends in Machine design · Vol. 10, Issue 3, 2023 · pp. 29–39 Read article