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957 articles for “S/N ratio”
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Application of Compressive Sensing for Sampling and Reconstruction of MRI Images
Abstract: In recent years, a new theory of compressive sensing has evolved which asserts that super resolved signals and images can be recovered with far fewer samples than that demanded by the Nyquist sampling theorem. It is required that the signal being sensed has a low information-rate meaning that it is sparse in original or some transform domain. Former approaches capture the complete signal and process it to extract the information. …
Published in Current Trends in Signal Processing · Vol. 6, Issue 2, 2016 · pp. 42–48 Read article
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Elimination of Noise on ECG Signal Using Adaptive Filter
Abstract: There are various biomedical signals present in the human body, by examining these biomedical signal one can check the health condition of a person who is clinically fit or not. Electrocardiogram (ECG) is one of them. ECG plays an important role in the primary diagnosis, prognosis and survival analysis of heart diseases. This ECG signal is corrupted by various noises like power line interference, baseline wandering etc. One way to …
Published in Current Trends in Signal Processing · Vol. 6, Issue 3, 2016 · pp. 9–15 Read article
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Optimization of MRR and TWR on Electro Discharge Machining using Taguchi based GRA
Abstract: Electro Discharge Machining (EDM) is one of the most effective nonconventional machining processes in order to obtain better finishing quality result. It is vastly used to machine the most complex as well as intricate shapes so as the productivity increases in a very short time interval. The input parameters are; discharge current, voltage and pulse on time. Taguchi L9 orthogonal array is used to find out the Signal to Noise …
Published in Journal of Industrial Safety Engineering · Vol. 3, Issue 3, 2016 · pp. 26–32 Read article
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Parametric Optimization of CNC Wire Cut EDM for Oil Harden Non-Shrinking Steel: A Comparative Study
Abstract: There has been a rapid growth in the development of harder and difficult to machine metals and newly developed alloys. Conventional machining methods are not suitable and uneconomical for such materials, thus development starts for newer concepts in metal machining. It thus plays a major role in the machining of dies, tools, etc., made of tungsten carbide, hard steel, alloys used in the aeronautics industry. It is a great concern …
Published in Journal of Materials & Metallurgical Engineering · Vol. 5, Issue 3, 2015 · pp. 44–58 Read article
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Determining the Effect of Cutting Parameters on Surface Roughness in Turning Process Using the Taguchi Method
Abstract: This study focuses on optimizing turning parameters based on the Taguchi method to minimize surface roughness (Ra). Experiments have been conducted using the L9 orthogonal array in a CNC turning machine. Turning tests are carried out on aluminium alloy AISI 1061 with carbide cutting tools. Each experiment is repeated two times and each test uses a new cutting insert to ensure accurate readings of the surface roughness. The statistical methods …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 2, Issue 3, 2015 · pp. 17–22 Read article
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Signal Identification of Differential STBC-OFDM System
Abstract: AbstractBlind recognition of communication parameters is a research topic of high importance for both military and civilian communication systems. Signal identification has emerged as an enabling technology for intelligent wireless communication systems with applications in military and commercial fields. Several identification algorithms are proposed for multiple antenna (MA) systems with multicarrier (MC) transmissions. The previously investigations are mostly limited to space-time block code (STBC) systems and space frequency block coding …
Published in Recent Trends in Electronics Communication Systems · Vol. 5, Issue 2, 2018 · pp. 21–27 Read article
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Reduced Partial Product Booth Multiplier with An Effective Error Compensation Circuit
Abstract: Reduced partial product Booth multiplier is mainly used in multimedia and digital signal processing (DSP) systems. In this paper, design of reduced partial product (constant-width) Booth multiplier is introduced. Here the least significant bit (LSB) of partial product matrix of Booth multiplier is removed and an error compensation function is derived for reducing truncation error. A simple error compensation circuit (SC generator) is also introduced to reduce the computations that …
Published in Trends in Electrical Engineering · Vol. 5, Issue 2, 2015 · pp. 42–49 Read article
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Tribological Behaviour of Epoxy-Marble Powder Composite with Taguchi Optimization Technique
Abstract: Epoxy resin strengthened with marble powder particles is prepared by ultrasonic mixing strategy. Pin-on-Disc wear trial of the developed composite is done concurring with Taguchi optimisation. An orthogonal array is displayed and analysed the affecting parameters like fraction of marble powder reinforcement, load, sliding speed and track diameter on the composite. Signal to noise ratio analysis optimises the parametric conditions that yield minimum wear rate, minimum frictional force and minimum …
Published in Trends in Mechanical Engineering & Technology · Vol. 8, Issue 2, 2018 · pp. 110–117 Read article
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Comparative Analysis of Power Penalty versus Crosstalk in Optical Active Network Components like Erbium Doped Fiber Amplifier, Raman Amplifier and Semiconductor Optical Amplifier
Abstract: AbstractOptical amplifiers boost the power of optical system without optoelectronics (O-E-O) conversion. The optical amplification process is accompanied by Amplified Spontaneous Emission (ASE) noise that accumulates along the transmission line and degrades the optical signal to noise ratio (OSNR). Intensity modulation in one channel causes crosstalk in the other channel via the change of the complex refractive index in the amplifier. In this paper, authors tried to calculate and compare …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 1, 2013 · pp. 1–10 Read article
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Zoom Based Image Super-Resolution: Using Two Level DWT as Feature Model
Abstract: AbstractIn this paper we present an algorithm of super-resolution (SR) imaging to reconstruct high-resolution (HR) image from sequence of low-resolution (LR) images of static scene captured at the different camera zoom factor. The resultant HR image is constructed at the resolution of the most zoomed LR image. In the proposed approach algorithm uses LR images of the static scene captured at three distinct zoom-factors. Learning based SR technique is used …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 95–105 Read article
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Embedding and Extraction of Watermark in Digital Audio
Abstract: AbstractDigital Watermarking, a discipline of steganography, is used to hide within an image or audio file some data specifically relating to that file. An enormous amount of work has been carried out in the field of Image Watermarking. Due to the increasing incidents of audio piracy and illegal retrieval of audio files over the internet, the field of audio watermarking has widespread attention from industry and researchers. In this paper, …
Published in Journal of Computer Technology & Applications · Vol. 5, Issue 2, 2014 · pp. 8–12 Read article
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Power Spectral Study of Heart Rate Variability Time Series by the Adaptive Modified Continuous Morlet Wavelet Transform
Abstract: In this paper, a newly developed method referred as adaptive modified continuous Morlet wavelet transform has been proposed to improve the energy concentration in the time-frequency domain. The improvement is achieved by introducing the shape parameter to the Morlet function that is known as modified Morlet function. To make it adaptive, the modified Morlet function was optimized by concentration measure based on automatic determination algorithm. The proposed method was validated …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 6, Issue 2, 2017 · pp. 5–20 Read article
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Reliability-Aware Mathematical Model for Radiation-Hardened Satellite Communication Systems
Abstract: Satellite communication systems operate in radiation environments in which total ionizing dose (TID), displacement damage, and single-event effects (SEE) can progressively degrade electronic, optoelectronic, and communication components and can ultimately reduce link availability and mission reliability. This paper develops a Reliability-Aware Radiation-Hardened Satellite Communication Model (R-RHSCM) that mathematically couples the orbital radiation environment, accumulated radiation dose, component degradation, communication-link performance, single-event failure probability, redundancy, thermal effects, and adaptive mitigation. The …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 15, Issue 2, 2026 Read article
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Preparation and Charactrization of lead free piezoelectric ceramic/PVA polymer composites
Abstract: Sodium potassium niobate (Na0.5K0.5 NbO3 ) ceramic was prepared through conventional solid state reaction using AR grade NaNO3, KNO3 and Nb2O5 in stochiometric ratio. Poly vinyl alcohol (PVA) polymer - sodium potassium niobate composite films were prepared by solution casting method by changing the blend ratio of PVA / Na0.5K0.5NbO3. The prepared samples in the form of films were characterized by powder X-ray diffraction. The XRD studies revealed the presence …
Published in Journal of Polymer & Composites · Vol. 6, Issue 1, 2018 · pp. 1–8 Read article
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Free Vibration Analysis of Thin Circular and Annular Plate with General Boundary Condition
Abstract: This paper presents a numerical analysis of free vibration of thin circular and annular plate using finite element method. The first five natural frequencies are presented for uniform annular plates of various inner-to-outer radii ratios, with nine possible combinations of free, clamped and simply supported boundary conditions at the inner and outer edges of plates. The accuracy of the method is established by comparing the results available in the literature. …
Published in Journal of Structural Engineering and Management · Vol. 2, Issue 2, 2015 · pp. 25–34 Read article
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Design And Analysis of Carbon Filler Reinforced Composite Small Wind Turbine Blades
Abstract: Although wind turbines have great potential for capturing wind energy, their blades suffer from unstable aerodynamic loads as a result of operating for extended time in challenging conditions. Both structural and aerodynamic performance are negatively impacted by these loads. The effectiveness of the wind turbine and the use of wind energy are significantly impacted by the choice airfoil. Commonly used airfoils include NACA 4412, NACA 23012, and SG6043. The lift …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 79–89 Read article
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Design and Implementation of an Energy-Efficient Wireless Sensor Network for Remote Monitoring
Abstract: Applications such as industrial automation, environmental monitoring, and agriculture make extensive use of wireless sensor networks, or WSNs. Since sensor nodes frequently operate in remote locations and have limited battery power, energy efficiency is the largest problem in WSN design. This paper presents an energy-efficient WSN architecture that combines optimized clustering and duty-cycling mechanisms to reduce energy consumption and increase network lifetime. The system uses low-power ESP32 nodes with Zigbee …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 13, Issue 1, 2026 · pp. 22–27 Read article
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Robust Design of Subsonic Airfoil by Multi-Objective Six Sigma Approach
Abstract: It is well known that aerodynamic performance of a UAV is very sensitive to the wing shape and flight conditions, and inevitable uncertainties such as wing manufacturing errors and wind variations may lead to drastic deterioration in its aerodynamic performance. In the UAV wing design, therefore, it is required not to use the conventional design optimization approach considering only optimality of performance at the design point, but to use the …
Published in Journal of Aerospace Engineering & Technology · Vol. 15, Issue 3, 2025 · pp. 14–23 Read article
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Study and Prediction of Radiation Effects in Solar Power Plants using Neuro Fuzzy and Neural Network
Abstract: Neural and neuro-fuzzy frameworks are utilized, to figure temperature and sun powered radiation. The principle benefit of these frameworks is that they don't need any earlier information on the qualities of the information time-series to foresee their future qualities. These frameworks with various models have been prepared utilizing as information estimations of the above meteorological boundaries acquired from the National Observatory of Athens. In the wake of having reproduced a …
Published in Trends in Electrical Engineering · Vol. 12, Issue 1, 2022 · pp. 8–19 Read article
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Free Vibration Analysis of Laminated Composite Plates with Circular and Non-Circular Cutouts using FEM
Abstract: This paper presents the free vibration analysis of a composite laminated plate with circular and non-circular cutouts, using finite element method (FEM). A number of examples concerning different aspect ratios, different thickness ratios, different values of material properties, different size of cutouts, different number of layers and different boundary conditions are considered. Convergence study has been carried out by comparing the results obtained to the numerical results available in the …
Published in Journal of Automobile Engineering and Applications · Vol. 4, Issue 1, 2017 · pp. 1–9 Read article