Relevant bibliographies by topics / Simultaneous multichannel measurement

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  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Simultaneous multichannel measurement'

Author: Grafiati
Published: 28 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Simultaneous multichannel measurement"

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Steffen, Matthias, Konrad Heimann, Nina Bernstein, and Steffen Leonhardt. "Multichannel simultaneous magnetic induction measurement system (MUSIMITOS)." Physiological Measurement 29, no. 6 (June 1, 2008): S291—S306. http://dx.doi.org/10.1088/0967-3334/29/6/s25.

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Gerhards, Holger, Ute Wollschläger, Qihao Yu, Philip Schiwek, Xicai Pan, and Kurt Roth. "Continuous and simultaneous measurement of reflector depth and average soil-water content with multichannel ground-penetrating radar." GEOPHYSICS 73, no. 4 (July 2008): J15—J23. http://dx.doi.org/10.1190/1.2943669.

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Ground-penetrating radar is a fast noninvasive technique that can monitor subsurface structure and water-content distribution. To interpret traveltime information from single common-offset measurements, additional assumptions, such as constant permittivity, usually are required. We present a fast ground-penetrating-radar measurement technique using a multiple transmitter-and-receiver setup to measure simultaneously the reflector depth and average soil-water content. It can be considered a moving minicommon-midpoint measurement. For a simple analysis, we use a straightforward evaluation procedure that includes two traveltimes to the same reflector, obtained from different antenna separations. For a more accurate approach, an inverse evaluation procedure is added, using traveltimes obtained from all antenna separations at one position and its neighboring measurement locations. The evaluation of a synthetic data set with a lateral variability in reflector depth and an experimental example with a large variability in soil-water content are introduced to demonstrate the applicability for field-scale measurements. The crucial point for this application is the access to absolute traveltimes, which are difficult to determine accurately from common-offset measurements.
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Rollow, Douglas, and David C. Swanson. "Applications of binary noiselike sequences to the simultaneous measurement of multichannel system functions." Journal of the Acoustical Society of America 101, no. 5 (May 1997): 3114. http://dx.doi.org/10.1121/1.418951.

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Nikolic, Aleksandar B., Blagoje Babic, Aleksandar Zigic, Nikola Miladinovic, and Srdjan Milosavljevic. "Simultaneous power quality analysis of feeders in MV utility power stations." ACTA IMEKO 4, no. 1 (February 5, 2015): 53. http://dx.doi.org/10.21014/acta_imeko.v4i1.163.

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The development of a low-cost, space saving device that could simultaneously take measurements from all (usually eight or up to twelve) outgoing three-phase feeders in a distribution substation is presented in this paper. To meet these requirements, at least 3 voltage measurements and 36 current measurements should be performed at the same time. In order to save space but not to reduce the measurement accuracy, a data acquisition system is designed based on real-time multiprocessing with a microcontroller and an FPGA circuit. Voltage and current measurements and their corresponding higher-order harmonics are calculated using a fast FPGA circuit, while other calculations (power, power factor, voltage and current phase angles, etc.) are performed in the microcontroller. Further savings are obtained using multichannel analog input modules with multiplexed inputs. Communication with the supervising computer is done using a GPRS modem or wireless network module depending of the station location. Results obtained in the laboratory and later in an industrial prototype confirm the proposed solution.
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Meoni, Andrea, Antonella D’Alessandro, Massimo Mancinelli, and Filippo Ubertini. "A Multichannel Strain Measurement Technique for Nanomodified Smart Cement-Based Sensors in Reinforced Concrete Structures." Sensors 21, no. 16 (August 21, 2021): 5633. http://dx.doi.org/10.3390/s21165633.

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Nanomodified smart cement-based sensors are an emerging self-sensing technology for the structural health monitoring (SHM) of reinforced concrete (RC) structures. To date, several literature works demonstrated their strain-sensing capabilities, which make them suited for damage detection and localization. Despite the most recent technological improvements, a tailored measurement technique allowing feasible field implementations of smart cement-based sensors to concrete structures is still missing. In this regard, this paper proposes a multichannel measurement technique for retrieving strains from smart cement-based sensors embedded in RC structures using a distributed biphasic input. The experiments performed for its validation include the investigation on an RC beam with seven embedded sensors subjected to different types of static loading and a long-term monitoring application on an RC plate. Results demonstrate that the proposed technique is effective for retrieving time-stable simultaneous strain measurements from smart cement-based sensors, as well as for aiding the identification of the changes in their electrical outputs due to the influence of environmental effects variable over time. Accordingly, the proposed multichannel strain measurement technique represents a promising approach for performing feasible field implementations of smart cement-based sensors to concrete structures.
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González, F., M. P. Cagigal, and M. A. Rebolledo. "Application of Photon Correlation and Multichannel Analysis Techniques to the Measurement of a Two-Line Spectrum: Simultaneous Determination of All Parameters." Applied Spectroscopy 40, no. 7 (September 1986): 959–62. http://dx.doi.org/10.1366/0003702864508070.

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In this paper the analysis of two spectral lines by using a digital correlator or a digital multichannel analyzer is studied by means of experiment and a computer simulation method. The errors involved in the simultaneous determination of the width, separation, and relative height of the lines are studied and compared.
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Axelsson, M., Q. Dang, K. Pitsillides, S. Munns, J. Hicks, and G. S. Kassab. "A novel, fully implantable, multichannel biotelemetry system for measurement of blood flow, pressure, ECG, and temperature." Journal of Applied Physiology 102, no. 3 (March 2007): 1220–28. http://dx.doi.org/10.1152/japplphysiol.00887.2006.

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Biotelemetry provides high-quality data in awake, free-ranging animals without the effects of anesthesia and surgery. Although many biological parameters can be measured using biotelemetry, simultaneous telemetric measurements of pressure and flow have not been available. The objective of this study was to evaluate simultaneous measurements of blood flow, pressure, ECG, and temperature in a fully implantable system. This novel system allows the measurement of up to four channels of blood flow, up to three channels of pressure, and a single channel each of ECG and temperature. The system includes a bidirectional radio-frequency link that allows the implant to send data and accept commands to perform various tasks. The system is controlled by a base station decoder/controller that decodes the data stream sent by the implant into analog signals. The system also converts the data into a digital data stream that can be sent via ethernet to a remote computer for storage and/or analysis. The system was chronically implanted in swine and alligators for up to 5 wk. Both bench and in vivo animal tests were performed to evaluate system performance. Results show that this biotelemetry system is capable of long-term accurate monitoring of simultaneous blood flow and pressure. The system allows, within the room, recordings, since the implant transmission range is between 6 and 10 m, and, with a relay, backpack transmission distance of up to 500 m can be achieved. This system will have significant utility in chronic models of cardiovascular physiology and pathology.
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Hebden, Jeremy C., Florian E. W. Schmidt, Martin E. Fry, Martin Schweiger, Elizabeth M. C. Hillman, David T. Delpy, and Simon R. Arridge. "Simultaneous reconstruction of absorption and scattering images by multichannel measurement of purely temporal data." Optics Letters 24, no. 8 (April 15, 1999): 534. http://dx.doi.org/10.1364/ol.24.000534.

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Vondra, Vlastimil, Pavel Jurak, Ivo Viscor, Josef Halamek, Pavel Leinveber, Magdalena Matejkova, and Ladislav Soukup. "A multichannel bioimpedance monitor for full-body blood flow monitoring." Biomedical Engineering / Biomedizinische Technik 61, no. 1 (February 1, 2016): 107–18. http://dx.doi.org/10.1515/bmt-2014-0108.

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Abstract The design, properties, and possible diagnostic contribution of a multichannel bioimpedance monitor (MBM) with three independent current sources are presented in this paper. The simultaneous measurement of bioimpedance at 18 locations (the main part of the body, legs, arms, and neck) provides completely new information, on the basis of which more precise haemodynamic parameters can be obtained. The application of the MBM during various haemodynamic stages, such as resting in a supine position, tilting, exercise stress, and various respiration manoeuvres, is demonstrated. Statistical analysis on a group of 34 healthy volunteers is presented for demonstration of blood flow monitoring by using the proposed method.
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Shi, Peiwan, Zhongbing Shi, Wei Chen, Wulyu Zhong, Zengchen Yang, Min Jiang, Boyu Zhang, et al. "Multichannel Microwave Interferometer for Simultaneous Measurement of Electron Density and its Fluctuation on HL-2A Tokamak." Plasma Science and Technology 18, no. 7 (June 28, 2016): 708–13. http://dx.doi.org/10.1088/1009-0630/18/7/02.

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Dissertations / Theses on the topic "Simultaneous multichannel measurement"

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Hidegová, Simona. "Validace multikanálové bioimpedance cév za použití synchronizované cévní sonografie." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442505.

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The inclusion of a new device in clinical practice requires an adequate validation. The original publication which introduced multichannel bioimpedance monitor MBM was focused on discribing its technical parameters and demonstration measurements. Further evaluation desires comparision with other standard measuring device. This thesis describes pulse wave measurement by MBM and by other medical devices used for establishing cardiovascular risk. It proposes the validation experiment with synchronized vascular ultrasonography as a reference method. The process of the experimental measurement, aquired data and following data analysis are described in detail. The outputs of the experiment are statistically evaluated. The MBM’s performance and design of the experiment are discussed.
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Conference papers on the topic "Simultaneous multichannel measurement"

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Zenevich, Sergei, Iskander Gazizov, Dmitry Churbanov, Maxim Spiridonov, and Alexander Rodin. "Portable multichannel heterodyne spectroradiometer for simultaneous atmospheric CO2 and CH4 precision column measurement in the near-infrared range." In 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, edited by Gennadii G. Matvienko and Oleg A. Romanovskii. SPIE, 2020. http://dx.doi.org/10.1117/12.2575506.

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Zhang, Xin, Yingxin Li, Yulong Zhang, Zuhui Chen, Shi Liu, Richard D. Nelson, and John C. LaRue. "Design of Microcontroller Based Test Bench for a Multichannel Integrated Biosensor Chip." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206841.

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The planar microelectrode array (pMEA) is an important tool for non-invasive recording in the fields of neuroscience and biosensing. It can be used for extra-cellular measurement of the induced voltage on an electrode underneath a cell upon the occurrence of an action potential. With the principle of capacitive coupling, the sensed electrode signal amplitudes typically range between 100 μV and 1 mV, depending on the cell type. Due to the small amplitude of original neural signals, signal conditioning and processing microelectronics units are necessary to integrate with the pMEA sensor for achievement of best measurement performance. Introducing fully customized ASIC into the microelectrode array substrate provides an efficient solution, which establishes the possibility of creating the biosensor system on chip (SoC) with a large number of sensing-sites for simultaneous measurement without introducing significant noise from the signal conditioning and processing circuitry [1]. In this research work, we have developed a fully customized biosensor chip for sensing the propagation of action potentials. With the paralleled multiple sub-circuits, this prototype multi-site planar microelectrode array biosensor integrates 24 (4 × 6) microelectrode array sensing sites, 24 parallel analog neural signal buffers and a shared OTA based high gain amplifier on the same substrate. Figure 1 depicts the biosensor chip architecture and the functional blocks of the biosensor system setup. The prototyped biosensor chip was fabricated by MOSIS using AMI C5 0.5μm, double poly, triple metal layer CMOS technology. The electroless gold plating process post-CMOS processing and packaging techniques were applied to the biosensor chip to promote the biocompatibility and stability in the aqueous cell culture environment. To interface the biosensor chip with PC, a microcontroller based electronic system is necessary to implement the functions of A/D conversion, biosensor chip control signal generation, digital signal processing and data/command communication between biosensor chip and GUI software running on PC. In this research work, a Motorola ColdFire MCF5307 microcontroller based electronic system was setup to serve as the interface between the biosensor chip and PC, which realized the full functions listed above. The firmware running on MCF5307 microcontroller was implemented with ColdFire assembly language where on the PC client Matlab platform was chosen to simply the software design work.
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Lu, K., G. Buselli, and J. Macnae. "Simultaneous Two-Dimensional Self-Potential Measurements with a Multichannel Receiver." In 62nd EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2000. http://dx.doi.org/10.3997/2214-4609-pdb.28.d8.

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Hu, Jing, Xiaoping Ouyang, Zhongbing Zhang, Jinliang Liu, Liang Chen, and Jinlu Ruan. "Optical Readout Characteristics in a New Gas Scintillation Chamber for Neutron Measurement." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67249.

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A novel neutron diagnostic method is presented based on optical readout from scintillation in gases excited by recoil charged particles for fusion research. According to the method, we have designed a new gas scintillation chamber filled with scintillation gas CF4 and installed with a multi-wires structure to provide strong electric field. The electric field distributions of cylindrical multi-wire structures with different geometrical parameters are analyzed systematically. By building up an optimal multi-wire structure, the optical readout characteristics are also studied with energetic charged particles. Electron-induced avalanche in the electric field excites gas molecules to emit numerous scintillation photons, which are readout using photomultiplier tubes, and measured using multichannel analysers. The results show that the light signals and charge signals are enhanced simultaneously and the rise time of the light signal hardly changes, approximately 12ns, as the applied voltage increases. More importantly, the typical pulse height spectrum from the light signals is acquired, and the obtained resolution is 8.8% for 6.5MeV protons.
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Di Santo, Simone, Nadege Bize-Forest, Isabelle Le Nir, and Carlos Maeso. "WELLBORE IMAGES DIGITAL FUSION: BEYOND SINGLE-SENSOR PHYSICAL CONSTRAINTS." In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0007.

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In the modern oilfield, borehole images can be considered as the minimally representative element of any well-planned geological model/interpretation. In the same borehole it is common to acquire multiple images using different physics and/or resolutions. The challenge for any petro-technical expert is to extract detailed information from several images simultaneously without losing the petrophysical information of the formation. This work shows an innovative approach to combine several borehole images into one new multi-dimensional fused and high-resolution image that allows, at a glance, a petrophysical and geological qualitative interpretation while maintaining quantitative measurement properties. The new image is created by applying color mathematics and advanced image fusion techniques: At the first stage low resolution LWD nuclear images are merged into one multichannel or multiphysics image that integrates all petrophysical measurement’s information of each single input image. A specific transfer function was developed, it normalizes the input measurements into color intensity that, combined into an RGB (red-green-blue) color space, is visualized as a full-color image. The strong and bilateral connection between measurements and colors enables processing that can be used to produce ad-hoc secondary images. In a second stage the multiphysics image resolution is increased by applying a specific type of image fusion: Pansharpening. The goal is to inject details and texture present in a high-resolution image into the low resolution multiphysics image without compromising the petrophysical measurements. The pansharpening algorithm was especially developed for the borehole images application and compared with other established sharpening methods. The resulting high-resolution multiphysics image integrates all input measurements in the form of RGB colors and the texture from the high-resolution image. The image fusion workflow has been tested using LWD GR, density, photo-electric factor images and a high-resolution resistivity image. Image fusion is an innovative method that extends beyond physical constraints of single sensors: the result is a unique image dataset that contains simultaneously geological and petrophysical information at the highest resolution. This work will also give examples of applications of the new fused image.
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Elshafey, Ahmed, Mahmoud Haddara, and Hesham Marzouk. "On the Use of Mode Shapes in the Identification of Structural Damage." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20069.

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The random decrement technique is an averaging technique that can be used to extract the free decay response of a structure from its stationary random vibratory response. The free decay response can then be used to identify the vibratory characteristics of the structure. The main advantage of the technique is that the identification of the parameters of the structure is achieved without previous knowledge of the excitation forces. This paper extends the random decrement technique to obtain the mode shapes of the structure using the concept of a multichannel random decrement technique (MCRD). This technique is based on extracting simultaneous random decrement records from measurements made at several points on the structure. The change in mode shapes as a result of occurrence of damage to the structure is then used to detect the presence and location of damage. The method is illustrated and validated using two case studies and finite element modeling. Excellent agreement between mode shapes obtained using the MCRD and those obtained from classical modal analysis techniques was found. The use of changes in the mode shapes of the structure to detect the presence and location of damage was successful.
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