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Journal articles on the topic 'Signal processing – Digital techniques – Evaluation'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Känsäkoski, M., O. Voutilainen, and T. Seppänen. "The Performance of near Infrared Analysers Can Be Improved by Digital Filtering Techniques." Journal of Near Infrared Spectroscopy 6, no. 1 (1998): 97–104. http://dx.doi.org/10.1255/jnirs.126.

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On-line near infrared (NIR) analysers are used widely for quantitative composition measurements in real-time process control systems. The accuracy and repeatability of the measurements are amongst the most important factors when evaluating the total performance of these analysers, but the lower detection limit is often limited by noise in the measurement signal. There are two major alternatives for reducing noise in an optical analyser: prevention of noise contamination and post-processing of the signal by filtering. In the second alternative, the measurement signal can be post-processed by di

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2

Santana-López, Zulema, Óscar Domínguez-Jaén, Jesús B. Alonso, and María Del Carmen Mato-Carrodeguas. "Voice re-education and its evaluation through digital signal processing: A case study." Loquens 4, no. 1 (2017): 040. http://dx.doi.org/10.3989/loquens.2017.040.

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Voice pathologies, caused either by functional dysphonia or organic lesions, or even by just an inappropriate emission of the voice, may lead to vocal abuse, affecting significantly the communication process.   The present study is based on the case of a single patient diagnosed with myasthenia gravis (Erb-Goldflam syndrome). In this case, this affection has caused, among other disruptions, a dysarthria. For its treatment, a technique for the education and re-education of the voice has been used, based on a resonator element: the cellophane screen.   This article shows

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TAKAHASHI, NOBUAKI, TSUYOSHI OTAKE, and MAMORU TANAKA. "NONLINEAR INTERPOLATIVE EFFECT OF FEEDBACK TEMPLATE FOR IMAGE PROCESSING BY DISCRETE-TIME CELLULAR NEURAL NETWORK." Journal of Circuits, Systems and Computers 12, no. 04 (2003): 505–18. http://dx.doi.org/10.1142/s0218126603001008.

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Recently a discrete-time cellular neural network (DT-CNN) is applied to many image processing applications such as compression and reconstruction, recognition and so on. Conventional image processing techniques such as the discrete cosine transformation (DCT) and wavelet transforms work as a simple filter and do not make good use of interpolative dynamics by the feedback A template, which is one of the significant characteristics of a cellular neural network (CNN). If CNN is applied to a filter by an only feedforward B template, one should make a model which consists of digital filters using h

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Alexandre, Felipe A., Paulo R. Aguiar, Reinaldo Götz, Martin Antonio Aulestia Viera, Thiago Glissoi Lopes, and Eduardo Carlos Bianchi. "A Novel Ultrasound Technique Based on Piezoelectric Diaphragms Applied to Material Removal Monitoring in the Grinding Process." Sensors 19, no. 18 (2019): 3932. http://dx.doi.org/10.3390/s19183932.

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The interest of the scientific community for ultrasound techniques has increased in recent years due to its wide range of applications. A continuous effort of researchers and industries has been made in order to improve and increase the applicability of non-destructive evaluations (NDE). In this context, the monitoring of manufacturing processes, such as the grinding process, arises. This work proposes a novel technique of ultrasound monitoring (chirp-through-transmission) through low-cost piezoelectric diaphragms and digital signal processing. The proposed technique was applied to the monitor

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Walia, Ekta, Shailja Sharma, and Anu Suneja. "On the Analysis of Global and Local Robust Image Watermarking Using Zernike Moments." International Journal of Computer Vision and Image Processing 4, no. 1 (2014): 56–69. http://dx.doi.org/10.4018/ijcvip.2014010105.

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Digital Watermarking allows an individual to add some hidden copyright notices or other verification messages to digital media, where message is a group of bits describing the information pertaining to the signal or its author. For this purpose, two techniques viz. global watermarking and local watermarking can be used. In this paper, the performance of two feature based global and local watermarking techniques using Zernike Moments(ZMs) have been analyzed by evaluating their robustness against geometric, photometric and other signal processing attacks including rotation, cropping and noise. E

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Mendhurwar, Kaustubha, Shivaji Patil, Harsh Sundani, Priyanka Aggarwal, and Vijay Devabhaktuni. "Edge-Detection in Noisy Images Using Independent Component Analysis." ISRN Signal Processing 2011 (April 10, 2011): 1–9. http://dx.doi.org/10.5402/2011/672353.

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Edges in a digital image provide important information about the objects contained within the image since they constitute boundaries between objects in the image. This paper proposes a new approach based on independent component analysis (ICA) for edge-detection in noisy images. The proposed approach works in two phases—the training phase and the edge-detection phase. The training phase is carried out only once to determine parameters for the ICA. Once calculated, these ICA parameters can be employed for edge-detection in any number of noisy images. The edge-detection phase deals with transiti

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Wahbi, Azeddine, Ahmed Roukhe, and Laamari Hlou. "Design and Evaluation of Modified Adaptive Block Normalized Algorithm for Acoustic Echo Cancellation in Hands-Free Communications." Network Protocols and Algorithms 7, no. 4 (2015): 63. http://dx.doi.org/10.5296/npa.v7i4.8159.

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The aim of this paper is to design and simulate an AEC in order to enhance the quality of speech disturbed by echo phenomenon. Therefore, in order to design the normalized adaptive AEC, we have used digital signal processing techniques, especially Simulink embedded functions. Effectiveness of the suggested AEC using adaptive normalized algorithm was verified using Matlab/Simulink software. Finally, our AEC has been tested by using ERLE criteria and the analysis results show more efficiency according to ITU-T recommendation G.168.

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Benyettou, Loutfi. "Performance Evaluation of A Multi-Sensor System Using Fixed Point DSP For Water Leak Detection." Indonesian Journal of Electrical Engineering and Computer Science 4, no. 3 (2016): 555. http://dx.doi.org/10.11591/ijeecs.v4.i3.pp555-560.

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<p>DSPs (Digital Processors Signal) are processors specifically designed for digital signals processing. The fixed-point DSPs are processors operating in integer arithmetic whose characteristics are often limited but not less powerful with respect to floating-point DSPs. In this article, it is a question of checking the performances provided by the fixed-point DSP, the TMS320C541. This one is used in a detection and remote locating system ensuring a control of water leaks on the pipes. The acoustic correlation technique used as means of detection of these leaks represents the key element

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Yildiz, Fikret, Ahmet Turan Özdemir, and Selman Uluışık. "Evaluation Performance of Ultrasonic Testing on Fruit Quality Determination." Journal of Food Quality 2019 (July 8, 2019): 1–7. http://dx.doi.org/10.1155/2019/6810865.

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There are several destructive and nondestructive methods for quality evaluation of agricultural products. Most of the employed traditional techniques are time-consuming and involve considerable degree of manual works. Destructive methods provide reasonable success rate of quality determination of fruits; however, they practically have many concerns about effectiveness, time, and cost. Therefore, developing portable, fast, and cost-effective techniques without harming fruits are desired for fruit quality evaluation. This work aims to develop a complete nondestructive quality evaluation system w

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Journal, Baghdad Science. "Multifocus Images Fusion Based On Homogenity and Edges Measures." Baghdad Science Journal 11, no. 2 (2014): 660–72. http://dx.doi.org/10.21123/bsj.11.2.660-672.

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Image fusion is one of the most important techniques in digital image processing, includes the development of software to make the integration of multiple sets of data for the same location; It is one of the new fields adopted in solve the problems of the digital image, and produce high-quality images contains on more information for the purposes of interpretation, classification, segmentation and compression, etc. In this research, there is a solution of problems faced by different digital images such as multi focus images through a simulation process using the camera to the work of the fuse

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TV, Bijeesh. "Performance evaluation of popular l1-minimization algorithms in the context of Compressed Sensing." Computer Engineering and Applications Journal 3, no. 1 (2014): 43–53. http://dx.doi.org/10.18495/comengapp.v3i1.39.

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Compressed sensing (CS) is a data acquisition technique that is gaining popularity because of the fact that the reconstruction of the original signal is possible even if it was sampled at a sub-Nyquist rate. In contrast to the traditional sampling method, in CS we take a few measurements from the signal and the original signal can then be reconstructed from these measurements by using an optimization technique called l1-minimization. Computer engineers and mathematician have been equally fascinated by this latest trend in digital signal processing. In this work we perform an evaluation of diff

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Dimas, Christos, Vassilis Alimisis, Ioannis Georgakopoulos, Nikolaos Voudoukis, Nikolaos Uzunoglu, and Paul P. Sotiriadis. "Evaluation of Thoracic Equivalent Multiport Circuits Using an Electrical Impedance Tomography Hardware Simulation Interface." Technologies 9, no. 3 (2021): 58. http://dx.doi.org/10.3390/technologies9030058.

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Electrical impedance tomography is a low-cost, safe, and high temporal resolution medical imaging modality which finds extensive application in real-time thoracic impedance imaging. Thoracic impedance changes can reveal important information about the physiological condition of patients’ lungs. In this way, electrical impedance tomography can be a valuable tool for monitoring patients. However, this technique is very sensitive to measurement noise or possible minor signal errors, coming from either the hardware, the electrodes, or even particular biological signals. Thus, the design of a good

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Penumadu, Dayakar. "Evaluating Clay Microfabric Using Scanning Electron Microscopy and Digital Information Processing." Transportation Research Record: Journal of the Transportation Research Board 1526, no. 1 (1996): 112–20. http://dx.doi.org/10.1177/0361198196152600114.

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Several aspects related to the qualitative and quantitative evaluation of clay microfabric are presented. A digital image processing technique called “intensity gradient analysis” is used in evaluating clay microfabric from scanning electron micrographs. Details are given of three computer programs (histogram.c, average.c and ellipse.c) that provide for the quantitative analysis of the orientation of clay particles. The important aspects related to sample and surface preparation, digital image acquisition, and analysis are explained. Two natural clays, Pennsylvanian fire clay and Pleistocene v

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El-Nahal, Fady. "Coherent 16 Quadrature Amplitude Modulation (16QAM) Optical Communication Systems." Photonics Letters of Poland 10, no. 2 (2018): 57. http://dx.doi.org/10.4302/plp.v10i2.809.

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Coherent optical fiber communications for data rates of 100Gbit/s and beyond have recently been studied extensively primarily because high sensitivity of coherent receivers could extend the transmission distance. Spectrally efficient modulation techniques such as M-ary quadrature amplitude modulation (M-QAM) can be employed for coherent optical links. The integration of multi-level modulation formats based on coherent technologies with wavelength-division multiplexed (WDM) systems is key to meet the aggregate bandwidth demand. This paper reviews coherent 16 quadrature amplitude modulation (16Q

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Mijarez, Rito, David Pascacio, Ricardo Guevara, and Joaquin Rodriguez. "Signal processing algorithm for thermal drift compensation in high-temperature down-hole instrumentation systems." Transactions of the Institute of Measurement and Control 39, no. 8 (2016): 1161–68. http://dx.doi.org/10.1177/0142331216630360.

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Down-hole oil and gas industry requirements for measuring thermodynamic and geophysical parameters, for instance pressure, temperature, vibration and multiphase flow, are challenging. Accomplishing these necessities requires a complete signal communications chain of high-performance components and effective signal processing communication techniques to provide system reliability. Nevertheless, noise interference, cable attenuation and thermal drift of the front-end passive electronic elements can lead to poor signal-to-noise ratio (SNR) and possibly loss of the communication link. This paper d

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Weng, Yi, Junyi Wang, and Zhongqi Pan. "Recent Advances in DSP Techniques for Mode Division Multiplexing Optical Networks with MIMO Equalization: A Review." Applied Sciences 9, no. 6 (2019): 1178. http://dx.doi.org/10.3390/app9061178.

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This paper provides a technical review regarding the latest progress on multi-input multi-output (MIMO) digital signal processing (DSP) equalization techniques for high-capacity fiber-optic communication networks. Space division multiplexing (SDM) technology was initially developed to improve the demanding capacity of optic-interconnect links through mode-division multiplexing (MDM) using few-mode fibers (FMF), or core-multiplexing exploiting multicore fibers (MCF). Primarily, adaptive MIMO filtering techniques were proposed to de-multiplex the signals upon different modes or cores, and to dyn

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Wang, Xiaotong, Chih-Chen Chang, and Lichu Fan. "Nondestructive Damage Detection of Bridges: A Status Review." Advances in Structural Engineering 4, no. 2 (2001): 75–91. http://dx.doi.org/10.1260/1369433011502372.

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The recent advances in detecting and locating damage in bridges by different kinds of non-destructive testing and evaluation (NDT&E) methods are reviewed. From the application point of view, classifications for general bridge components and their damage types are presented. The relationships between damage, bridge components, and NDT&E techniques are summarized. Many useful WEB sources of NDT&E techniques in bridge damage detection are given. It is concluded that: (1) vibration-based damage detection methods are successful to a certain extent, especially when the overall damage is

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Safont, Gonzalo, Addisson Salazar, Luis Vergara, Antonio Vidal, and Alberto Gonzalez. "Assessment of Historic Structures Based on GPR, Ultrasound, and Impact-Echo Data Fusion." Key Engineering Materials 569-570 (July 2013): 1210–17. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.1210.

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This paper presents a method for assessment of historic structures based on the fusion of data from ground-penetrating radar (GPR), ultrasound, and impact-echo testing. The method consists of the following steps: measuring, feature extraction, fusion, representation, and evaluation. The employed techniques for an application in scale models of historical walls are described. Thus, experimental deployment; signal feature processing; fusion operators (including order statistics digital filters); 2D non-destructive testing images, and figures of merits of the fused results are explained in detail

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Kumar, P. S. Jagadeesh, Tracy Lin Huan, and Yang Yung. "Computational Paradigm and Quantitative Optimization to Parallel Processing Performance of Still Image Compression." Circulation in Computer Science 2, no. 4 (2017): 11–17. http://dx.doi.org/10.22632/ccs-2017-252-02.

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Fashionable and staggering evolution in inferring the parallel processing routine coupled with the necessity to amass and distribute huge magnitude of digital records especially still images has fetched an amount of confronts for researchers and other stakeholders. These disputes exorbitantly outlay and maneuvers the digital information among others, subsists the spotlight of the research civilization in topical days and encompasses the lead to the exploration of image compression methods that can accomplish exceptional outcomes. One of those practices is the parallel processing of a diversity

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Capineri, Lorenzo, and Andrea Bulletti. "A Versatile Analog Electronic Interface for Piezoelectric Sensors Used for Impacts Detection and Positioning in Structural Health Monitoring (SHM) Systems." Electronics 10, no. 9 (2021): 1047. http://dx.doi.org/10.3390/electronics10091047.

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Continuous monitoring of mechanical impacts is one of the goals of modern SHM systems using a sensor network installed on a structure. For the evaluation of the impact position, there are generally applied triangulation techniques based on the estimation of the differential time of arrival (DToA). The signals generated by impacts are multimodal, dispersive Lamb waves propagating in the plate-like structure. Symmetrical S0 and antisymmetrical A0 Lamb waves are both generated by impact events with different velocities and energies. The discrimination of these two modes is an advantage for impact

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Meißner, H., M. Cramer, and R. Reulke. "TOWARDS STANDARDIZED EVALUATION OF IMAGE QUALITY FOR AIRBORNE CAMERA SYSTEMS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1 (September 26, 2018): 295–300. http://dx.doi.org/10.5194/isprs-archives-xlii-1-295-2018.

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<p><strong>Abstract.</strong> Digital airborne camera systems and their high geometric resolution demand for new algorithms and procedures of image data analysis and interpretation. Parameters describing image quality are necessary for various fields of application (e.g. sensor and mission design, sensor comparison, algorithm development, in-orbit-behaviour of instruments). The effective sensor resolution is one important parameter which comprehensively estimates the optical quality of a given imaging sensor-lens combination. Although determination of resolving power is a wel

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Stotter, Christian, and Erika Angerer. "Evaluation of 3C microelectromechanical system data on a 2D line: Direct comparison with conventional vertical-component geophone arrays and PS-wave analysis." GEOPHYSICS 76, no. 3 (2011): B79—B87. http://dx.doi.org/10.1190/1.3561769.

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A 2D vibroseis line was acquired in the Vienna Basin (Austria) for the purpose of comparing the data of digital multicomponent single sensors based on microelectromechanical system (MEMS) sensors alongside conventional vertical-component geophone arrays. For efficient removal of coherent noise during processing, all source points were recorded in single-sweep mode, i.e., no vertical stacking was performed in the field. On this densely sampled data set, several noise-reduction techniques, such as digital array forming, frequency-wavenumber (f-k) filtering in shot and receiver domains, and polar

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Benammar, Mohieddine, Abdulrahman Alassi, Adel Gastli, Lazhar Ben-Brahim, and Farid Touati. "New Fast Arctangent Approximation Algorithm for Generic Real-Time Embedded Applications." Sensors 19, no. 23 (2019): 5148. http://dx.doi.org/10.3390/s19235148.

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Fast and accurate arctangent approximations are used in several contemporary applications, including embedded systems, signal processing, radar, and power systems. Three main approximation techniques are well-established in the literature, varying in their accuracy and resource utilization levels. Those are the iterative coordinate rotational digital computer (CORDIC), the lookup tables (LUTs)-based, and the rational formulae techniques. This paper presents a novel technique that combines the advantages of both rational formulae and LUT approximation methods. The new algorithm exploits the pse

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Lattner, Stefan, and Javier Nistal. "Stochastic Restoration of Heavily Compressed Musical Audio Using Generative Adversarial Networks." Electronics 10, no. 11 (2021): 1349. http://dx.doi.org/10.3390/electronics10111349.

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Lossy audio codecs compress (and decompress) digital audio streams by removing information that tends to be inaudible in human perception. Under high compression rates, such codecs may introduce a variety of impairments in the audio signal. Many works have tackled the problem of audio enhancement and compression artifact removal using deep-learning techniques. However, only a few works tackle the restoration of heavily compressed audio signals in the musical domain. In such a scenario, there is no unique solution for the restoration of the original signal. Therefore, in this study, we test a s

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RACCA, R. G., Z. MENG, J. M. OZARD, and M. J. WILMUT. "EVALUATION OF MASSIVELY PARALLEL COMPUTING FOR EXHAUSTIVE AND CLUSTERED MATCHED-FIELD PROCESSING." Journal of Computational Acoustics 04, no. 02 (1996): 159–73. http://dx.doi.org/10.1142/s0218396x96000039.

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Many computer algorithms contain an operation that accounts for a substantial portion of the total execution cost in a frequently executed loop. The use of a parallel computer to execute that operation may represent an alternative to a sheer increase in processor speed. The signal processing technique known as matched-field processing (MFP) involves performing identical and independent operations on a potentially huge set of vectors. To investigate a massively parallel approach to MFP and clustered nearest neighbors MFP, algorithms were implemented on a DECmpp 12000 massively parallel computer

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Suneetha, Akula, and E. Srinivasa Reddy. "Robust Gaussian Noise Detection and Removal in Color Images using Modified Fuzzy Set Filter." Journal of Intelligent Systems 30, no. 1 (2020): 240–57. http://dx.doi.org/10.1515/jisys-2019-0211.

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Abstract In the data collection phase, the digital images are captured using sensors that often contaminated by noise (undesired random signal). In digital image processing task, enhancing the image quality and reducing the noise is a central process. Image denoising effectively preserves the image edges to a higher extend in the flat regions. Several adaptive filters (median filter, Gaussian filter, fuzzy filter, etc.) have been utilized to improve the smoothness of digital image, but these filters failed to preserve the image edges while removing noise. In this paper, a modified fuzzy set fi

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Flizikowski, Adam, Rafał Kozik, Henryk Gierszal, Marcin Przybyszewski, and Witold Hołubowicz. "WiMAX Cell Level Simulation Platform Based on ns-2 and DSP Integration." International Journal of Electronics and Telecommunications 56, no. 2 (2010): 169–76. http://dx.doi.org/10.2478/v10177-010-0022-3.

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WiMAX Cell Level Simulation Platform Based on ns-2 and DSP IntegrationThe WiMAX (Worldwide Interoperability for Microwave Access) system based on the IEEE 802.16 family of standards is a promising technology for last-mile access. Both IEEE 802.16 and 3GPP-LTE systems candidate for becoming the 4G network of choice. The need to evaluate multiple performance enhancing techniques like MIMO, OFDM(A), novel channel coding schemes like non-binary LDPC codes, together with development of standards like IEEE 802.21, that aims at enabling handover and interoperability between heterogeneous network type

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Sharma, Chirag, Amandeep Bagga, Rajeev Sobti, Mohammad Shabaz, and Rashid Amin. "A Robust Image Encrypted Watermarking Technique for Neurodegenerative Disorder Diagnosis and Its Applications." Computational and Mathematical Methods in Medicine 2021 (September 20, 2021): 1–14. http://dx.doi.org/10.1155/2021/8081276.

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The use of Internet technology has led to the availability of different multimedia data in various formats. The unapproved customers misuse multimedia information by conveying them on various web objections to acquire cash deceptively without the first copyright holder’s intervention. Due to the rise in cases of COVID-19, lots of patient information are leaked without their knowledge, so an intelligent technique is required to protect the integrity of patient data by placing an invisible signal known as a watermark on the medical images. In this paper, a new method of watermarking is proposed

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Goldsmith, Noel T. "DEEP FOCUS; A DIGITAL IMAGE PROCESSING TECHNIQUE TO PRODUCE IMPROVED FOCAL DEPTH IN LIGHT MICROSCOPY." Image Analysis & Stereology 19, no. 3 (2011): 163. http://dx.doi.org/10.5566/ias.v19.p163-167.

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In light microscopy, the spatial transverse resolution is a function of the wavelength and numerical aperture. The depth resolution is another function of these parameters. The factors that enable the detection of fine detail, make the sharp focusing of more than a thin slice of the depth in an object impossible. When the examination of fracture surfaces is attempted using light reflection microscopy, the roughness will often restrict the in-focus parts of an image to a small portion of the field of view. Several authors have presented methods that enable a set of digitised images to be proces

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Davis, Sachin, Nathan Salowitz, Lucas Beversdorf, and Marcia R. Silva. "The Effect of Various Parameters on a Portable Sensor for the Detection of Thin Biofilms in Water Pipes." Sensors 21, no. 13 (2021): 4421. http://dx.doi.org/10.3390/s21134421.

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The use of high-frequency strain waves to perform examinations and note measurements is referred to as ultrasonic testing (UT). UT is commonly used for the detection or evaluation of flaws and characterization of materials, among other applications. A standard ultrasonic inspection system comprises a pulser/receiver, transducer, and display devices. The pulser/receiver produces electrical pulses of high voltage. The transducer generates high-frequency ultrasonic energy after being driven by the pulser. The reflected wave is then converted into an electrical signal by the transducer and is disp

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Salamh, Fahad E., Mohammad Meraj Mirza, and Umit Karabiyik. "UAV Forensic Analysis and Software Tools Assessment: DJI Phantom 4 and Matrice 210 as Case Studies." Electronics 10, no. 6 (2021): 733. http://dx.doi.org/10.3390/electronics10060733.

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Unmanned Aerial Vehicles (UAVs) also known as drones have created many challenges to the digital forensic field. These challenges are introduced in all processes of the digital forensic investigation (i.e., identification, preservation, examination, documentation, and reporting). From identification of evidence to reporting, there are several challenges caused by the data type, source of evidence, and multiple components that operate UAVs. In this paper, we comprehensively reviewed the current UAV forensic investigative techniques from several perspectives. Moreover, the contributions of this

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Zapryanov, G. "UDP – a New Universal Demosaicing Pipeline Algorithm for RGB Color Filter Arrays." Information Technologies and Control 11, no. 3 (2014): 16–29. http://dx.doi.org/10.2478/itc-2013-0012.

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Abstract A new universal demosaicing method suitable for imaging pipelines using a RGB color filter array (CFA) is proposed. The proposed algorithm can reconstruct single-sensor images registered by a digital camera equipped with any RGB CFA currently in use. The algorithm includes a spatio-spectral interpolation model, a new edge-detection technique, and a post processing to reduce the color shifts and artifacts of the reconstructed image. Experimental results over various test CFA patterns and real images demonstrate the efficiency and feasibility of a universal demosaicing algorithm propose

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Dugarte Jerez, Nelson, Antonio Alvarez, Edison Dugarte, Negman Alvarado, and Sonu Bhaskar. "Practical Design of Flow Meter for Mechanical Ventilation Equipment." Journal of Computer Science and Technology 21, no. 1 (2021): e5. http://dx.doi.org/10.24215/16666038.21.e5.

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This paper introduces a practical technique for the design of an instrument used in air flow measurement or flowmeter. This instrument is an essential component in the hospital medical ventilation equipment functioning, therefore, the parameters design presented in this article focus on this purpose. However, this instrument can be employed to any measurement scale. The technique is based on indirect flow measurement, using a sensor that converts the flow parameter into a differential pressure measurement. An electronic transducer allows the differential pressure values to be obtained as an el

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Wang, Baowei, and Peng Zhao. "An Adaptive Image Watermarking Method Combining SVD and Wang-Landau Sampling in DWT Domain." Mathematics 8, no. 5 (2020): 691. http://dx.doi.org/10.3390/math8050691.

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To keep a better trade-off between robustness and imperceptibility is difficult for traditional digital watermarks. Therefore, an adaptive image watermarking method combining singular value decomposition (SVD) and the Wang–Landau (WL) sampling method is proposed to solve the problem. In this method, the third-level approximate sub-band obtained by applying the three-level wavelet transform is decomposed by SVD to obtain the principal component, which is firstly selected as the embedded position. Then, the information is finally embedded into the host image by the scaling factor. The Wang–Landa

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Začal, Jaroslav, Petr Dostál, Jakub Rozlivka, and Martin Brabec. "Analysis of Surface Defects in Composites Using Digital Image Correlation and Acoustic Emission." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 66, no. 5 (2018): 1217–24. http://dx.doi.org/10.11118/actaun201866051217.

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This work employs the acoustic emission (AE) method for material state monitoring. AE presents a non‑destructive evaluation technique, which could be used for detection of microstructural changes in composite material. Work describes the process of acquisition of AE in tensile loading of carbon composite materials. In course of tensile stress, the composite was monitored with optical method, applying principles of digital image correction (DIC). Optical stereovision method enables calculation of field shift and field of proportional deformation at composite surface. The objective is analysis o

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Elhossini, Ahmed, Shawki Areibi, and Robert Dony. "Architecture Exploration Based on GA-PSO Optimization, ANN Modeling, and Static Scheduling." VLSI Design 2013 (September 26, 2013): 1–22. http://dx.doi.org/10.1155/2013/624369.

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Embedded systems are widely used today in different digital signal processing (DSP) applications that usually require high computation power and tight constraints. The design space to be explored depends on the application domain and the target platform. A tool that helps explore different architectures is required to design such an efficient system. This paper proposes an architecture exploration framework for DSP applications based on Particle Swarm Optimization (PSO) and genetic algorithms (GA) techniques that can handle multiobjective optimization problems with several hybrid forms. A nove

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Lai, Ying-Hui, Pei-Chun Li, Kuen-Shian Tsai, Woei-Chyn Chu, and Shuenn-Tsong Young. "Measuring the Long-Term SNRs of Static and Adaptive Compression Amplification Techniques for Speech in Noise." Journal of the American Academy of Audiology 24, no. 08 (2013): 671–83. http://dx.doi.org/10.3766/jaaa.24.8.4.

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Background: Multichannel wide-dynamic-range compression (WDRC) is a widely adopted amplification scheme in modern digital hearing aids. It attempts to provide individuals with loudness recruitment with superior speech intelligibility and greater listening comfort over a wider range of input levels. However, recent surveys have shown that compression processing (operating in the nonlinear regime) usually reduces the long-term signal-to-noise ratio (SNR). Purpose: The purpose of this study was to determine the long-term SNR in an adaptive compression-ratio (CR) amplification scheme called adapti

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Costa, Silvana Luciene do Nascimento Cunha, Giulliana Karla Lacerda Pereira de Queiroz, Suzete Élida Nóbrega Correia, Vinícius Jefferson Dias Vieira, and Leonardo Wanderley Lopes. "Classificação de disfonias por meio da análise de medidas não lineares e de quantificação de recorrência." Revista Principia - Divulgação Científica e Tecnológica do IFPB 1, no. 38 (2018): 148. http://dx.doi.org/10.18265/1517-03062015v1n38p148-160.

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In recent years techniques of digital processing of speech signals have been used as an auxiliary tool in the evaluation of vocal deviations, providing the patient with greater comfort low cost and objectivity when compared to the techniques traditionally employed, such as perceptual-auditory analysis. The evaluation of vocal quality, through acoustic analysis of voice signals, is becoming a very popular clinical practice for the detection of vocal disorders that in some cases can be caused by laryngeal lesions or vocal abuse. In this research, we used some traditional non-linear measures comb

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Wang, Xiaoliang, Shufan Wu, Deren Gong, Qiang Shen, Dengfeng Wang, and Christopher Damaren. "Evaluation of Precise Microwave Ranging Technology for Low Earth Orbit Formation Missions with Beidou Time-Synchronize Receiver." Sensors 21, no. 14 (2021): 4883. http://dx.doi.org/10.3390/s21144883.

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In this study, submillimeter level accuracy K-band microwave ranging (MWR) equipment is demonstrated, aiming to verify the detection of the Earth’s gravity field (EGF) and digital elevation models (DEM), through spacecraft formation flying (SFF) in low Earth orbit (LEO).In particular, this paper introduces in detail an integrated BeiDou III B1C/B2a dual frequency receiver we designed and developed, including signal processing scheme, gain allocation, and frequency planning. The receiver matched the 0.1 ns precise synchronize time-frequency benchmark for the MWR system, verified by a static and

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Rishek Hoshi, Alaa, Nasharuddin Zainal, Mahamod Ismail, Abd Al-Razak T. Rahem, and Salim Muhsin Wadi. "A robust watermark algorithm for copyright protection by using 5-level DWT and two logos." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 2 (2021): 842. http://dx.doi.org/10.11591/ijeecs.v22.i2.pp842-856.

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<span>Recent growth and development of internet and multimedia technologies have made it significant to upload data; however, in this situation, the protection of intellectual property rights has become a critical issue. Digital media, including videos, audios, and images are readily distributed, reproduced, and manipulated over these networks that will be lost copyright. Also, the development of various data manipulation tools like PDF converter and Photoshop Editor has resulted in digital data copyright issues. So, a digital watermarking technique has emerged as an efficient technique

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Mousavi, S. M. H., V. Lyashenko, and V. B. S. Prasath. "Analysis of a robust edge detection system in different color spaces using color and depth images." Computer Optics 43, no. 4 (2019): 632–46. http://dx.doi.org/10.18287/2412-6179-2019-43-4-632-646.

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Edge detection is very important technique to reveal significant areas in the digital image, which could aids the feature extraction techniques. In fact it is possible to remove un-necessary parts from image, using edge detection. A lot of edge detection techniques has been made already, but we propose a robust evolutionary based system to extract the vital parts of the image. System is based on a lot of pre and post-processing techniques such as filters and morphological operations, and applying modified Ant Colony Optimization edge detection method to the image. The main goal is to test the

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Sanchez, Martha L., Gil Capote, and Julián Carrillo. "Experimental and numerical evaluation of the mechanical behavior of diagonally reinforced plates subjected to the effect of residual thermal stresses." Ingeniería e Investigación 37, no. 3 (2017): 124–32. http://dx.doi.org/10.15446/ing.investig.v37n3.60633.

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This paper presents an experimental and numerical study of the effect of residual thermal stresses on the mechanical behavior of diagonally reinforced plates. The study focuses on the analysis of carbon/epoxy square plates onto which diagonal reinforcements were glued. These reinforcements were glued using two different methodologies: the first method was to glue the reinforcements at operating temperature (22 °C), while in the second methodology reinforcements were cured in an autoclave at 177 °C. Mechanical behavior assessment was based on the stiffness, free vibration, and buckling tests. F

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Gong, Xuan, Zichun Le, Hui Wang, and Yukun Wu. "Study on the Moving Target Tracking Based on Vision DSP." Sensors 20, no. 22 (2020): 6494. http://dx.doi.org/10.3390/s20226494.

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The embedded visual tracking system has higher requirements for real-time performance and system resources, and this is a challenge for visual tracking systems with available hardware resources. The major focus of this study is evaluating the results of hardware optimization methods. These optimization techniques provide efficient utilization based on limited hardware resources. This paper also uses a pragmatic approach to investigate the real-time performance effect by implementing and optimizing a kernel correlation filter (KCF) tracking algorithm based on a vision digital signal processor (

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Chadli, Hajar, Sara Chadli, Mohamed Boutouba, Mohammed Saber, and Abdelwahed Tahani. "Hardware implementation and performance evaluation of microcontroller-based 7-level inverter using POD-SPWM technique." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 1 (2021): 120. http://dx.doi.org/10.11591/ijeecs.v23.i1.pp120-131.

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Renewable energy sources are considered as inexhaustible sources for the very long-term, as they come from natural processes that are constantly replenished. However, there are a number of challenges facing renewable energy technology adoption, like the grid connecting problems. One of the main challenges relates to the grid connecting problem is the power quality issues for power converter, such as harmonics, voltage stability, and frequency fluctuation. Hence, the inverter remains the first element to be built because of its undeniable advantages in alternative continuous conversion. However

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Mikkelsen, H. F. "Using digital signal processing techniques in light controllers." IEEE Transactions on Consumer Electronics 39, no. 2 (1993): 122–30. http://dx.doi.org/10.1109/30.214817.

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Smith, Steward G., Ralph W. Morgan, and Julian Payne. "ASIC techniques for high-performance digital signal processing." Annales des Télécommunications 46, no. 1-2 (1991): 40–48. http://dx.doi.org/10.1007/bf02995434.

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Laddomada, M., G. J. Dolecek, L. Yong Ching, Fa-Long Luo, M. Renfors, and L. Wanhammar. "Editorial: Advanced techniques on multirate signal processing for digital information processing." IET Signal Processing 5, no. 3 (2011): 313. http://dx.doi.org/10.1049/iet-spr.2011.9058.

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Al-Haija, Qasem Abu, and Abdulaziz A. Alsulami. "High Performance Classification Model to Identify Ransomware Payments for Heterogeneous Bitcoin Networks." Electronics 10, no. 17 (2021): 2113. http://dx.doi.org/10.3390/electronics10172113.

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The Bitcoin cryptocurrency is a worldwide prevalent virtualized digital currency conceptualized in 2008 as a distributed transactions system. Bitcoin transactions make use of peer-to-peer network nodes without a third-party intermediary, and the transactions can be verified by the node. Although Bitcoin networks have exhibited high efficiency in the financial transaction systems, their payment transactions are vulnerable to several ransomware attacks. For that reason, investigators have been working on developing ransomware payment identification techniques for bitcoin transactions’ networks t

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., Umashanker Sahu. "DIGITAL SIGNAL PROCESSING TECHNIQUES FOR LTI FIBER IMPAIRMENT COMPENSATION." International Journal of Research in Engineering and Technology 02, no. 10 (2013): 168–72. http://dx.doi.org/10.15623/ijret.2013.0210024.

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Myers, D. G., Azizul H. Quazi, and Shakila A. Quazi. "Digital Signal Processing—Efficient Convolution and Fourier Transform Techniques." Journal of the Acoustical Society of America 91, no. 1 (1992): 536. http://dx.doi.org/10.1121/1.402719.

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