Log in

Relevant bibliographies by topics / Modula??o de amplitude / Journal articles

To see the other types of publications on this topic, follow the link: Modula??o de amplitude.

Journal articles on the topic 'Modula??o de amplitude'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Modula??o de amplitude.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Drummond, Lucas Rios, Miguel Araujo Carneiro-Júnior, Sandra Lauton-Santos, et al. "ÓXIDO NÍTRICO E DINÂMICA DE CA2+ EM CARDIOMIÓCITOS: INFLUÊNCIA DA CAPACIDADE DE EXERCÍCIO." Revista Brasileira de Medicina do Esporte 22, no. 1 (2016): 31–34. http://dx.doi.org/10.1590/1517-869220162201143904.

Full text

Abstract:

RESUMO Introdução: A capacidade intrínseca para o exercício aeróbico está relacionada com o inotropismo cardíaco. Por outro lado, a participação do óxido nítrico (NO) como mensageiro intracelular sobre a dinâmica do Ca2+ ainda permanece desconhecida em ratos com diferentes capacidades intrínsecas para o exercício. Objetivo: Avaliar se o NO modula diferentemente o transiente intracelular de Ca2+ e liberações espontâneas de Ca2+(sparks) em cardiomiócitos de ratos com diferentes capacidades intrínsecas para o exercício. Métodos: Ratos machos Wistar foram selecionados como desempenho padrão (DP) e

APA, Harvard, Vancouver, ISO, and other styles

2

VAISBURD, I. D. "P-LOOP VACUUM AMPLITUDE IN THE OPEN BOSONIC STRING THEORY." Modern Physics Letters A 03, no. 05 (1988): 511–16. http://dx.doi.org/10.1142/s0217732388000611.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

PASQUINUCCI, ANDREA, and MICHELA PETRINI. "ON THE EVALUATION OF COMPTON SCATTERING AMPLITUDES IN STRING THEORY." International Journal of Modern Physics A 13, no. 27 (1998): 4717–57. http://dx.doi.org/10.1142/s0217751x98002237.

Full text

Abstract:

We consider the Compton amplitude for the scattering of a photon and an (massless) "electron/positron" at one loop (i.e. genus 1) in a four-dimensional fermionic heterotic string model. Starting from the bosonization of the world sheet fermions needed to explicitly construct the spin fields representing the space–time fermions, we present all the steps of the computation which leads to the explicit form of the amplitude as an integral of modular forms over the moduli space.

APA, Harvard, Vancouver, ISO, and other styles

4

Wang, Y. C., S. Gunasekaran, and A. J. Giacomin. "The Lodge Rubberlike Liquid Behavior for Cheese in Large Amplitude Oscillatory Shear." Applied Rheology 11, no. 6 (2001): 312–19. http://dx.doi.org/10.1515/arh-2001-0017.

Full text

Abstract:

AbstractThe viscoelasticity of reduced-fat Cheddar and Mozzarella cheeses was characterized in small (parallel disk rheometer, go = 0.01) and large (sliding plate rheometer, 0.2< go <7) amplitude oscillatory shear at 40 and 60˚C. We deduced the linear relaxation spectrum from the small strain measurements. At large strain amplitudes, we found sinusoidal stress responses whose amplitudes are well below those predicted from the linear relaxation spectrum, and yet remarkably linear with strain amplitude. We call this the large strain linear regime. We discovered that the Lodge rubberlike li

APA, Harvard, Vancouver, ISO, and other styles

5

Yu, Liang Jun, Li Hua Sun, and Cui Cui Huang. "Design of Comprehensive Test Instrument Based on FPGA and Cortex-M0." Applied Mechanics and Materials 312 (February 2013): 583–87. http://dx.doi.org/10.4028/www.scientific.net/amm.312.583.

Full text

Abstract:

The design consists of three modules: the voltage amplitude measurement module, the level oscillator module and the amplitude-frequency characteristic test module. The voltage amplitude measurement module uses AD817 to consist three-stage amplifier. The magnification of each level can be adjusted for 1 times/10 times. At the same time, the author uses the Cortex-M0 for controlling the relay switch to achieve automatic range conversion. The principle of DDS is adopted in the level oscillator module. FPGA is used for realizing the phase accumulator, the phase modulator, the sine ROM look-up tabl

APA, Harvard, Vancouver, ISO, and other styles

6

Zhang, Haicheng, Daolin Xu, Chao Lu, Enrong Qi, Jiajun Hu, and Youshen Wu. "Amplitude death of a multi-module floating airport." Nonlinear Dynamics 79, no. 4 (2015): 2385–94. http://dx.doi.org/10.1007/s11071-014-1819-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

MARTÍN-DELGADO, M. A., and J. RAMÍREZ MITTELBRUNN. "BORDERED RIEMANN SURFACES, SCHOTTKY GROUPS AND OFF-SHELL STRING AMPLITUDES." International Journal of Modern Physics A 06, no. 10 (1991): 1719–47. http://dx.doi.org/10.1142/s0217751x91000927.

Full text

Abstract:

We propose an off-shell extension of the closed bosonic string scattering amplitudes as functional integrals over bordered Riemann surfaces. The tree level off-shell N-scalars amplitude is handled with the help of Schottky groups and the Burnside θ-series. Using these tools and the asymptotic behaviour of the partition function at the boundary of the moduli space, we show that the off-shell amplitudes exhibit the tachyon mass-shell poles in the external momenta. In addition, their residues are shown to be the semi-off-shell amplitudes and the well-known Koba-Nielsen amplitudes.

APA, Harvard, Vancouver, ISO, and other styles

8

EZAWA, KIYOSHI. "TRANSITION AMPLITUDE IN (2+1)-DIMENSIONAL CHERN-SIMONS GRAVITY ON A TORUS." International Journal of Modern Physics A 09, no. 27 (1994): 4727–45. http://dx.doi.org/10.1142/s0217751x94001898.

Full text

Abstract:

In the framework of the Chern-Simons gravity proposed by Witten, a transition amplitude of a torus universe in (2+1)-dimensional quantum gravity is computed. This amplitude has the desired properties as a probability amplitude of the quantum mechanics of a torus universe, namely, it has a peak on the “classical orbit” and it satisfies the Schrödinger equation of the (2+1)-dimensional gravity. The discussion is given that the classical orbit dominance of the amplitude is not altered by taking the modular invariance into account and that this amplitude can serve as a covariant transition amplitu

APA, Harvard, Vancouver, ISO, and other styles

9

Maloratsky, Leo G. "Switched Directional/Omnidirectional Antenna Module for Amplitude Monopulse Systems." IEEE Antennas and Propagation Magazine 51, no. 5 (2009): 90–102. http://dx.doi.org/10.1109/map.2009.5432048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Mayya, V., and L. M. Loew. "STAT module can function as a biphasic amplitude filter." Systems Biology 2, no. 1 (2005): 43–52. http://dx.doi.org/10.1049/sb:20045037.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kato, A., Y. Matsuo, and S. Odake. "Modular invariance and two-loop bosonic string vacuum amplitude." Physics Letters B 179, no. 3 (1986): 241–46. http://dx.doi.org/10.1016/0370-2693(86)90573-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Murtazin, D. G., and A. S. Belyaeva. "Development of the amplitude spectrum clustering module in Python." Automation, Telemechanization and Communication in Oil Industry, no. 2 (2021): 6–11. http://dx.doi.org/10.33285/0132-2222-2021-2(571)-6-11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Tian, Tian, Wu Jian, and Nie Li. "Measurement of Amplifier Open-Loop Amplitude Frequency Characteristics Based on Virtual Instrument." Applied Mechanics and Materials 475-476 (December 2013): 16–22. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.16.

Full text

Abstract:

In the electronic measurement field, how to measure the open-loop amplitude frequency characteristics of the amplifier automatically is a question to be overcame. And now , the system ,which under the integrated development environment that the virtual instrument software LabVIEW provides, to measure the open-loop amplitude frequency characteristics of the amplifier is developed by combining the modern electronic measurement technology and computer data processing technology. The virtual signal generator which is based on the data acquisition card, signal acquisition, correlation analysis, fre

APA, Harvard, Vancouver, ISO, and other styles

14

Lion, Alexander. "Strain-Dependent Dynamic Properties of Filled Rubber: A Non-Linear Viscoelastic Approach Based on Structural Variables." Rubber Chemistry and Technology 72, no. 2 (1999): 410–29. http://dx.doi.org/10.5254/1.3538811.

Full text

Abstract:

Abstract This essay deals with a general framework based on the phenomenological theory of non-linear thermoviscoelasticity to represent the characteristic strain dependence of dynamic moduli of carbon black-filled vulcanizates (Payne effect). By virtue of thermodynamical arguments we develop a one-dimensional model consisting of non-linear springs and damping elements. We introduce viscosity functions depending not only on the temperature but on other variables besides. They can be related to the current state of the material's microstructure. Under dynamic loads and stationary conditions, th

APA, Harvard, Vancouver, ISO, and other styles

15

Choi, Jaesun, and Avraam I. Isayev. "NATURAL RUBBER/CARBON NANOTUBE NANOCOMPOSITES PREPARED BY ULTRASONICALLY AIDED EXTRUSION." Rubber Chemistry and Technology 86, no. 1 (2013): 109–31. http://dx.doi.org/10.5254/rct.13.88919.

Full text

Abstract:

ABSTRACT Natural rubber/multiwalled carbon nanotube (MWCNT) nanocomposites at loadings from 2 to 25 phr were prepared by ultrasonically aided extrusion at ultrasonic amplitudes up to 7.5 μm. Die pressure significantly decreased with an increase of ultrasonic amplitude, especially at higher loadings. Power consumption increased with ultrasonic amplitude and was almost insensitive to loadings until an amplitude of 5.0 μm. However, lower values of power consumption were observed at an amplitude of 7.5 μm for loadings of 10 and 15 phr. At these loadings, complex viscosity, storage, and loss moduli

APA, Harvard, Vancouver, ISO, and other styles

16

Nakandhrakumar, R. S., D. Dinakaran, D. Pikton, and J. Patabiraman. "Mathematical models of flank wear using vibration amplitude ratio in drilling." FME Transactions 47, no. 3 (2019): 430–36. http://dx.doi.org/10.5937/fmet1903430n.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Tutuncu, Azra N., Augusto L. Podio, Alvin R. Gregory, and Mukul M. Sharma. "Nonlinear viscoelastic behavior of sedimentary rocks, Part I: Effect of frequency and strain amplitude." GEOPHYSICS 63, no. 1 (1998): 184–94. http://dx.doi.org/10.1190/1.1444311.

Full text

Abstract:

Sedimentary rocks display nonlinear elastic behavior. This nonlinearity is a strong function of frequency, strain amplitude, and the properties of the saturating fluid. Experimental observations and potential mechanisms that cause these nonlinearities are presented in this and a companion paper. Young’s moduli and Poisson’s ratios obtained from ultrasonic laboratory measurements (50 kHz, 100 kHz, 180kHz and 1 MHz), low‐frequency measurements (1–2000 Hz) and static measurements (0.001–0.05 Hz) show significant differences under identical stress conditions. A comparison of the laboratory‐measure

APA, Harvard, Vancouver, ISO, and other styles

18

Vinasco Suarez, Juan Alejandro, Adrian Radu, and Carlos Alberto Duque Echeverri. "Propiedades electrónicas de un anillo cuántico elíptico con sección transversal rectangular." Revista EIA 16, no. 31 (2019): 77–87. http://dx.doi.org/10.24050/reia.v16i31.1255.

Full text

Abstract:

Los estados electrónicos de un anillo cuántico elíptico de GaAs embebido en una matriz de AlxGa1-xAs son investigados mediante la aproximación de masa efectiva. El anillo cuántico es construido con una sección transversal rectangular (dirección radial). La ecuación de Schrödinger es resuelta mediante el método de elementos finitos. En dirección angular se modula la amplitud de la altura, lo que permite la generación de puntos cuánticos a lo largo del anillo. Se reportan las energías del electrón como función de las dimensiones del anillo, tanto las longitudes de las elipses en el plano xy como

APA, Harvard, Vancouver, ISO, and other styles

19

Tan, Haisheng, and A. I. Isayev. "Comparative Study of Silica-, Nanoclay- and Carbon Black-Filled Ethylene Propylene Diene Monomer (EPDM) Rubbers Treated by Ultrasound." Rubber Chemistry and Technology 81, no. 1 (2008): 138–55. http://dx.doi.org/10.5254/1.3548193.

Full text

Abstract:

Abstract The ultrasonic treatment of unfilled EPDM and silica-, nanoclay- and CB-filled EPDM mixtures was carried out using a coaxial ultrasonic extruder at various ultrasonic amplitudes. Rheological properties, morphology, cure characteristics and mechanical properties were measured. The storage and loss moduli and complex dynamic viscosity of untreated and ultrasonically treated silica-filled EPDM mixtures were significantly higher than those of the nanoclay- and CB-filled EPDM mixtures in the frequency measurement range with the Tan Delta being significantly lower than that of the nanoclay-

APA, Harvard, Vancouver, ISO, and other styles

20

Iengo, Roberto, and Chuan-Jie Zhu. "Explicit modular invariant two-loop superstring amplitude relevant for R4." Journal of High Energy Physics 1999, no. 06 (1999): 011. http://dx.doi.org/10.1088/1126-6708/1999/06/011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Lee. "Music and Voice Separation Using Log-Spectral Amplitude Estimator Based on Kernel Spectrogram Models Backfitting." Journal of the Acoustical Society of Korea 34, no. 3 (2015): 227. http://dx.doi.org/10.7776/ask.2015.34.3.227.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Russell, Alexandria M., and Anand Gnanadesikan. "Understanding Multidecadal Variability in ENSO Amplitude." Journal of Climate 27, no. 11 (2014): 4037–51. http://dx.doi.org/10.1175/jcli-d-13-00147.1.

Full text

Abstract:

Abstract Sea surface temperatures (SSTs) in the tropical Pacific vary as a result of the coupling between ocean and atmosphere driven largely by El Niño–Southern Oscillation (ENSO). ENSO amplitude is known to vary on long time scales, which makes it difficult to quantify its response to climate change and constrain the physical processes that drive it. To characterize the long-period variability in ocean–atmosphere coupling strengths, a linear regression of local SST changes is applied to the 4000-yr GFDL Climate Model, version 2.1 (CM2.1) and the 500-yr GFDL CM2 with Modular Ocean Model versi

APA, Harvard, Vancouver, ISO, and other styles

23

Mohammadi, Farough, and Ramin Sedaghati. "Dynamic mechanical properties of an electrorheological fluid under large-amplitude oscillatory shear strain." Journal of Intelligent Material Systems and Structures 23, no. 10 (2012): 1093–105. http://dx.doi.org/10.1177/1045389x12442013.

Full text

Abstract:

In the present study, the shear stress response and the dynamic mechanical properties of an electrorheological fluid are experimentally investigated for small/large shear strain amplitude at moderate range of frequencies and different field intensities. A new efficient constitutive model has also been proposed, which can accurately predict the measured experimental data. Compared with the Fourier transformation rheology, the proposed model requires less number of parameters in order to predict the stress response and the mechanical properties, including storage and loss moduli for different st

APA, Harvard, Vancouver, ISO, and other styles

24

Kazakevičiūtė-Makovska, Rasa, Aycan Özlem Özarmut, and Holger Steeb. "Characterization of Shape Memory Polymer Estane by Means of Dynamic Mechanical Thermal Analysis Technique." Smart Materials Research 2014 (January 9, 2014): 1–9. http://dx.doi.org/10.1155/2014/250258.

Full text

Abstract:

Commercially available shape memory polymer (SMP) Estane (designation: ETE75DT3 NAT022) is investigated by means of dynamic mechanical thermal analysis (DMTA) technique in torsion mode using the Modular Compact Rheometer MCR-301 (Anton Paar GmbH). Amplitude sweep tests have been run below and above the glass transition temperature to establish the linear viscoelastic range (LVR) in glassy and rubbery phase of this SMP for the correct physical interpretation of DMTA data. Temperature sweep tests were performed at various frequencies to study the influence of this parameter on values of the stor

APA, Harvard, Vancouver, ISO, and other styles

25

Sun, Jianguo, and Dirk Gajewski. "True‐amplitude common‐shot migration revisited." GEOPHYSICS 62, no. 4 (1997): 1250–59. http://dx.doi.org/10.1190/1.1444226.

Full text

Abstract:

In Kirchhoff‐type migration, two dynamic ray‐tracing computations are usually needed for computing the complex weighting (Green's) functions necessary for recovering the source pulse with true amplitude. One computation is from the source point to the image point, the other is from the receiver point to the image point. Since it is a time‐consuming procedure, dynamic ray tracing is a main factor slowing down the performance speed of weighted diffraction stack migration. Here, the known weighting function for a common‐shot configuration is revisited and a new, alternative formula is developed.

APA, Harvard, Vancouver, ISO, and other styles

26

Nishida, Masahiro, Tomio Endo, Tadaharu Adachi, and Hiroyuki Matsumoto. "Measurements of local elastic moduli by amplitude and phase acoustic microscope." NDT & E International 30, no. 5 (1997): 271–77. http://dx.doi.org/10.1016/s0963-8695(96)00054-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Zhang, H. C., D. L. Xu, C. Lu, E. R. Qi, C. Tian, and Y. S. Wu. "Connection effect on amplitude death stability of multi-module floating airport." Ocean Engineering 129 (January 2017): 46–56. http://dx.doi.org/10.1016/j.oceaneng.2016.11.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Lee, Young Chul, Tae Wan Kim, Azzemi Bin Ariffin, and No-Gil Myoung. "60-GHz amplitude shift-keying receiver LTCC system-on-package module." Microwave and Optical Technology Letters 53, no. 4 (2011): 758–61. http://dx.doi.org/10.1002/mop.25824.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Lee, Young Chul. "60-GHz amplitude shift-keying transceiver LTCC system-on-package module." Microwave and Optical Technology Letters 55, no. 1 (2012): 48–51. http://dx.doi.org/10.1002/mop.27264.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Spencer, James W., Michael E. Cates, and Don D. Thompson. "Frame moduli of unconsolidated sands and sandstones." GEOPHYSICS 59, no. 9 (1994): 1352–61. http://dx.doi.org/10.1190/1.1443694.

Full text

Abstract:

In this study, we investigate the elastic moduli of the empty grain framework (the “frame” moduli) in unconsolidated sands and consolidated sandstones. The work was done to improve the interpretation of seismic amplitude anomalies and amplitude variations with offset (AVO) associated with hydrocarbon reservoirs. We developed a laboratory apparatus to measure the frame Poisson’s ratio and Young’s modulus of unconsolidated sands at seismic frequencies (0.2 to 155 Hz) in samples approximately 11 cm long. We used ultrasonic pulse velocity measurements to measure the frame moduli of consolidated sa

APA, Harvard, Vancouver, ISO, and other styles

31

Singh, D., G. Dombe, C. Bhongale, P. P. Singh, Mehilal Maurya, and B. Bhattacharya. "Shear Thickening Behaviour of Composite Propellant Suspension under Oscillatory Shear." Defence Science Journal 66, no. 3 (2016): 222. http://dx.doi.org/10.14429/dsj.66.8849.

Full text

Abstract:

Composite propellant suspensions consist of highly filled polymeric system wherein solid particles of different sizes and shapes are dispersed in a polymeric matrix. The rheological behaviour of a propellant suspension is characterised by viscoplasticity and shear rate and time dependant viscosity. The behaviour of composite propellant suspension has been studied under amplitude sweep test where tests were performed by continuously varying strain amplitude (strain in %, γ) by keeping the frequency and temperature constant and results are plotted in terms of log γ (strain amplitude) vs logGʹ an

APA, Harvard, Vancouver, ISO, and other styles

32

Choi, Jaesun, and Avraam I. Isayev. "NATURAL RUBBER/CARBON BLACK NANOCOMPOSITES PREPARED BY ULTRASONICALLY AIDED EXTRUSION." Rubber Chemistry and Technology 86, no. 4 (2013): 633–52. http://dx.doi.org/10.5254/rct.13.87955.

Full text

Abstract:

ABSTRACT Significant efforts have been made in rubber research to improve the dispersion of carbon black (CB) in rubbers to achieve better processibility and performance of tires and rubber products. In addressing these issues, the present study is an attempt to further improve the processibility and dispersion by means of application of ultrasonic waves. Natural rubber (NR)/CB nanocomposites at loadings from 15 to 60 phr were prepared by ultrasonically aided extrusion at ultrasonic amplitudes up to 7.5 μm. A die pressure significantly decreased with an increase of amplitude, especially at hig

APA, Harvard, Vancouver, ISO, and other styles

33

TSEYTLIN, A. A. "GRAVITON AMPLITUDES, EFFECTIVE ACTION AND STRING GENERATING FUNCTIONAL ON THE DISC." International Journal of Modern Physics A 04, no. 13 (1989): 3269–304. http://dx.doi.org/10.1142/s0217751x89001333.

Full text

Abstract:

We discuss some issues related to computation and renormalization of closed string amplitudes and effective action on the disc. The general expression for the O (ln ε) term in the string theory and effective field theory generating functionals for the S matrix is found. It is emphasized that in order to establish the correspondence between the string theory and the effective field theory it is necessary to compare the total coefficients of all (“local” plus “modular” and “N-dependent” plus “N-independent”) infinities present in the amplitudes. The regularized expression for the N=3 graviton am

APA, Harvard, Vancouver, ISO, and other styles

34

Noskov, Vladislav, Rinat Galeev, Evgeniy Bogatyrev, Kirill Ignatkov, and Kirill Shaidurov. "Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation." Sensors 20, no. 24 (2020): 7077. http://dx.doi.org/10.3390/s20247077.

Full text

Abstract:

A mathematical model of an autodyne oscillator with a combined amplitude-frequency modulation, which is under the influence of its own radiation reflected from the target, is developed. The main relations are obtained for analyzing the autodyne response of a single-circuit oscillator depending on the delay time of the radiation reflected from the target with an arbitrary law of simultaneous amplitude and frequency modulation. The characteristics of the amplitude selection of signals, as well as their temporal and spectral characteristics, are calculated for harmonic amplitude-frequency modulat

APA, Harvard, Vancouver, ISO, and other styles

35

Sun, Jianguo, and Dirk Gajewski. "On the computation of the true‐amplitude weighting functions." GEOPHYSICS 63, no. 5 (1998): 1648–51. http://dx.doi.org/10.1190/1.1444460.

Full text

Abstract:

True‐amplitude migration is a new development of Kirchhoff‐type migration. By using a proper weighting function, called true‐amplitude weighting function, in the modified diffraction‐stack operator, one can obtain a reconstructed source pulse proportional to the reflection coefficient of the target reflector. According to Schleicher et al. (1993), the true‐amplitude weighting function is complex and consists of two parts. One part is the module of the complex weighting function, given by means of a 2 × 2 ray transformation submatrix called [Formula: see text]. The other is the phase factor of

APA, Harvard, Vancouver, ISO, and other styles

36

Li, Zhang Yong, Fei Ba Chang, Xiao Bo Chen, Rui Leng, and Wei Wang. "A Design Based on Bioimpedance Spectroscopy Method in Human Abdominal Adipose Measurement System." Applied Mechanics and Materials 263-266 (December 2012): 241–45. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.241.

Full text

Abstract:

This article describes a measurement of human abdominal fat device designed based on BIS (bioimpedance spectroscopy), the device adopts four electrodes multi-frequency bioelectrical impedance measurement system, including the programmable signal generator module and the amplitude and phase detection module. Program controlled signal generator module can generate the high output impedance of the constant current source in the eight frequency points constant current source between 5KHz and1MHz; amplitude phase detecting module can detect the human body electrical impedance real part and imaginar

APA, Harvard, Vancouver, ISO, and other styles

37

Hashemi, Mohammad, and Yaroslav Zhuk. "Thermal instability and failure prediction of structural elements with transversely isotropic nanocomposite material." Physico-mathematical modelling and informational technologies, no. 25 (May 25, 2017): 151–56. http://dx.doi.org/10.15407/fmmit2017.25.151.

Full text

Abstract:

This paper is dedicated to the failure prediction for nanocomposite structural elements due to thermal instability under cyclic loading. It is based on the model of monoharmonic approximation and concept of complex moduli. The temperature and amplitude dependent complex moduli is used for the investigation of the dissipative heating influence on mechanical stability of polymeric nanocomposite rod subjected to both static and monoharmonic loading. Also, the influence of amplitude of the excitation loading and the volume fraction of nanofibers on thermal stability of the polymeric nanocomposite

APA, Harvard, Vancouver, ISO, and other styles

38

Noh, Hyoung-Woo, Jeong-Ho Park, Il-Heung Kang, Mun-Gak Choi, and Kang-Wook Kim. "The Phase Difference Measurement Module Development for Amplitude Modulated Range Measurement System." Journal of Korean Institute of Electromagnetic Engineering and Science 22, no. 2 (2011): 182–90. http://dx.doi.org/10.5515/kjkiees.2011.22.2.182.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Xia, S. Y., D. L. Xu, H. C. Zhang, E. R. Qi, J. J. Hu, and Y. S. Wu. "On retaining a multi-module floating structure in an amplitude death state." Ocean Engineering 121 (July 2016): 134–42. http://dx.doi.org/10.1016/j.oceaneng.2016.05.024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Zu, Xudong, Huaishuai Wu, Haiyu Lv, Yu Zheng, and Hui Li. "An Amplitude- and Temperature-Dependent Vibration Model of Fiber-Reinforced Composite Thin Plates in a Thermal Environment." Materials 13, no. 7 (2020): 1590. http://dx.doi.org/10.3390/ma13071590.

Full text

Abstract:

A thermal environment has a complex influence on the dynamic characteristics of fiber-reinforced composite materials and structures. It is challenging to consider the effects of high temperature and external vibration energy simultaneously on their nonlinear vibration response. In this research, the material nonlinearities, due to both the excitation amplitudes and the high temperatures, are studied for the first time, and a new nonlinear vibration model of fiber-reinforced composite thin plates in a thermal environment is proposed by introducing the nonlinear thermal and amplitude fitting coe

APA, Harvard, Vancouver, ISO, and other styles

41

Gantiva, Carlos, Andrés Zarabanda, Jenny Ricaurte, Luz Calderón, Katherine Ortiz, and Karen Castillo. "Efecto de la empatía afectiva sobre el procesamiento cortical de emojis." Pensamiento Psicológico 17, no. 1 (2019): 7–17. http://dx.doi.org/10.11144/javerianacali.ppsi17-1.eeap.

Full text

Abstract:

Objetivo. Identificar las diferencias en el procesamiento cortical de emojis en personas con alta y baja empatía afectiva. Método. El estudio se llevó a cabo con 69 participantes, distribuidos en dos grupos –baja y alta empatía afectiva–, según su puntaje en el Índice de Reactividad Interpersonal. Cada participante observó emojis con expresiones de alegría, ira y neutros. Se registraron los potenciales relacionados a eventos (PRE) P100, N170 y LPP. Resultados. Se encontró una mayor amplitud del N170 en el grupo de personas con alta empatía afectiva y, en general, mayor magnitud del LPP ante em

APA, Harvard, Vancouver, ISO, and other styles

42

Xiong, Cai Jun, Cui Yun Gao, Jie Chen, Yi Ding, Shao Yi Chen, and Guang Wen Zhang. "Measuring Method and Error Compensation for Amplitude-Frequency Characteristics of Electromagnetic Voltage Transformer." Advanced Materials Research 933 (May 2014): 566–71. http://dx.doi.org/10.4028/www.scientific.net/amr.933.566.

Full text

Abstract:

The amplitude-frequency characteristics of voltage transformer need to be measured accurately when the electrical parameters of inverter module are detected. Using frequency method to measure one electromagnetic voltage transformer entirely, the amplitude-frequency characteristics with waveform distortion and phase delay were tested and analyzed by FFT on some typical frequencies. Amplitude-frequency transfer errors were compensated by nonlinear fitting method mainly on 50Hz, 15kHz , 20kHz segment. One order and two order curve fitting of the least squares function called lsqcurvefit were simu

APA, Harvard, Vancouver, ISO, and other styles

43

Sawangsuriya, Auckpath, Tuncer B. Edil, and Peter J. Bosscher. "Relationship Between Soil Stiffness Gauge Modulus and Other Test Moduli for Granular Soils." Transportation Research Record: Journal of the Transportation Research Board 1849, no. 1 (2003): 3–10. http://dx.doi.org/10.3141/1849-01.

Full text

Abstract:

Recently, there has been a concerted effort to develop methods for direct measurement of soil stiffness, modulus, or both. A new field test device called the soil stiffness gauge (SSG), which is currently marketed as GeoGauge, shows potential to assess near-surface stiffness. A comparison is presented of moduli obtained from the SSG with moduli obtained from other tests on granular soils. The maximum singleamplitude dynamic force produced during the SSG measurement is determined to be 17.3 N. On this basis, an estimate of the shear strain amplitude produced from the SSG is made by finite eleme

APA, Harvard, Vancouver, ISO, and other styles

44

Szwarc, Krzysztof Jakub, Pawel Szczepankowski, Janusz Nieznański, Cezary Swinarski, Alexander Usoltsev, and Ryszard Strzelecki. "Hybrid Modulation for Modular Voltage Source Inverters with Coupled Reactors." Energies 13, no. 17 (2020): 4450. http://dx.doi.org/10.3390/en13174450.

Full text

Abstract:

This paper proposes and discusses a concept of a hybrid modulation for the control of modular voltage source inverters with coupled reactors. The use of coupled reactors as the integrating elements leads to significant reduction in the size and weight of the circuit. The proposed modulation combines novel coarsely quantized pulse amplitude modulation (CQ-PAM) and innovative space-vector pulse width modulation (SVPWM). The former enjoys very low transistor switching frequency and low harmonic elimination, while the latter ensures high resolution of amplitude control. The SVPWM is based on the u

APA, Harvard, Vancouver, ISO, and other styles

45

Basu, Anirban. "Simplifying the one-loop five graviton amplitude in type IIB string theory." International Journal of Modern Physics A 32, no. 14 (2017): 1750074. http://dx.doi.org/10.1142/s0217751x17500749.

Full text

Abstract:

We consider the [Formula: see text] and [Formula: see text] terms in the low momentum expansion of the five graviton amplitude in type IIB string theory at one loop. They involve integrals of various modular graph functions over the fundamental domain of [Formula: see text]. Unlike the graphs which arise in the four graviton amplitude or at lower orders in the momentum expansion of the five graviton amplitude where the links are given by scalar Green functions, there are several graphs for the [Formula: see text] and [Formula: see text] terms where each of these two links are given by a deriva

APA, Harvard, Vancouver, ISO, and other styles

46

Chen, Junying, Fu Zhu, Mou Liu, Zhen Meng, Lin Xu, and Lin Xu. "A method to improve tracking ability of drive control of MEMS gyroscopes." Sensor Review 41, no. 2 (2021): 153–61. http://dx.doi.org/10.1108/sr-09-2019-0222.

Full text

Abstract:

Purpose A high-precision gyroscope is an important tool for accurate positioning, and the amplitude stability and frequency tracking ability of the drive control system are important and necessary conditions to ensure the precision of micro-electro-mechanical systems (MEMS) gyroscopes. To improve the precision of MEMS gyroscopes, this paper proposes a method to improve the amplitude stability and frequency tracking ability of a drive control system. Design/methodology/approach A frequency tracking loop and an amplitude control loop are proposed to improve the frequency tracking ability and amp

APA, Harvard, Vancouver, ISO, and other styles

47

Shi, Guolong, Yigang He, Lichuan Gu, and Jun Jiao. "Industry 4.0-Oriented Chipless RFID Backscatter Signal Variable Polarization Amplitude Deep Learning Coding." Wireless Communications and Mobile Computing 2021 (September 23, 2021): 1–11. http://dx.doi.org/10.1155/2021/6985420.

Full text

Abstract:

Due to the weak network security protection capabilities of control system network protocols under Industry 4.0, the research on industrial control network intrusion detection is still in its infancy. This article discussed and researched the intrusion prevention technology of industrial control networks based on deep learning. According to the electromagnetic scattering theory, the backscatter signal model of the chipless tag was established as a chipless tag structure. Polarized deep learning coding was used for the label; that was, deep learning coding was performed on the copolarization co

APA, Harvard, Vancouver, ISO, and other styles

48

Jiali, Yu, and Xia Chaoying. "Hybrid modular multilevel converter with cascaded full bridges for medium-voltage motor drives." Transactions of the Institute of Measurement and Control 41, no. 12 (2019): 3279–91. http://dx.doi.org/10.1177/0142331218817087.

Full text

Abstract:

Modular multilevel converter (MMC) is especially appropriate in high-voltage constant-frequency systems due to its modularity and scalability. But, so far MMC has not been widely used in motor drives applications. Since the capacitor voltage fluctuation is proportional to the output current amplitude and inversely proportional to the output frequency under constant torque load, at the low-speed, the excessive sub-module (SM) capacitor voltage fluctuation is one of the major obstacles for MMC applied in motor drives. To suppress the SM capacitor voltage fluctuation, an effective solution is to

APA, Harvard, Vancouver, ISO, and other styles

49

Zhou, Hai Jun, Hai Feng Liu, and Hong Hong Huang. "Mechanical Behavior of Super-Elastic Home-Made NiTi Shape Memory Alloy Bar in Tension." Advanced Materials Research 671-674 (March 2013): 1817–20. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.1817.

Full text

Abstract:

An experimental study on mechanical behavior of home-made super-elastic NiTi Shape Memory Alloy (SMA) bar subjected to tension was made. The SMA bar specimen was 8mm in gage diameter and 50mm in gage length. The experimental tests were carried out by applying repeated cyclic loads. The tested tension strain amplitudes were 1%-7% and material phase was austenite. The mechanical characteristic parameters, such as phase transformation stress, deformation module, residual strain, energy loss and equivalent damping were studied. The effects of strain amplitude, loading rate and loading cycles on th

APA, Harvard, Vancouver, ISO, and other styles

50

Achour, Yahia, Jacek Starzyński, and Jacek Rąbkowski. "Modular Marx Generator Based on SiC-MOSFET Generating Adjustable Rectangular Pulses." Energies 14, no. 12 (2021): 3492. http://dx.doi.org/10.3390/en14123492.

Full text

Abstract:

The paper introduces a new design of Marx generator based on modular stages using Silicon Carbide MOSFETs (SiC-MOSFET) aimed to be used in biomedical applications. In this process, living cells are treated with intense nanosecond Pulsed Electrical Field (nsPEF). The electric field dose should be controlled by adjusting the pulse parameters such as amplitude, repetition rate and pulse-width. For this purpose, the structure of the proposed generator enables negative pulses with a quasi-rectangular shape, controllable amplitude, pulse-width and repetition-rate. A complete simulation study was con

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!