The Experts below are selected from a list of 31566 Experts worldwide ranked by ideXlab platform
H. Omote - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - Time-Spatial Path Modeling with Multi-Scattering Attenuation Factors for Wideband Mobile Propagation
2006 IEEE 63rd Vehicular Technology Conference, 1Co-Authors: T. Fujii, H. OmoteAbstract:In order to accurately assess spatial processing techniques such as Adaptive Array Antenna (AAA) and MIMO for wideband mobile communications, we proposed a time-spatial path model that allows the delay profile and angle profile of the traveling wave to be simulated at the same time. In order to explain the field measurement results in various environments, this paper proposes an advanced time-spatial path model that uses several Attenuation Factors instead of the one Attenuation Factor used in our previous proposal.
Nazario Martín - One of the best experts on this subject based on the ideXlab platform.
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Determining the Attenuation Factor in Molecular Wires Featuring Covalent and Noncovalent Tectons
Angewandte Chemie (International ed. in English), 2016Co-Authors: Sonia Vela, Dirk M. Guldi, Stefan Bauroth, Carmen Atienza, Agustín Molina-ontoria, Nazario MartínAbstract:Hybrid covalent/supramolecular porphyrin–fullerene structures were synthesized as highly efficient molecular wires with a remarkably low Attenuation Factor (β=0.07±0.01 A−1). Hydrogen-bonding interactions and p-phenylene oligomers of different lengths are responsible for efficient electron transfer in the molecular wires.
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Determination of the Attenuation Factor in fluorene-based molecular wires
Chemical communications (Cambridge England), 2007Co-Authors: Carmen Atienza-castellanos, Mateusz Wielopolski, Martin R Bryce, Dirk M. Guldi, Cornelia Van Der Pol, Salvatore Filippone, Nazario MartínAbstract:Fluorene-based bridges exhibit a molecular wire-like behaviour in C60–wire–exTTF systems with a very low Attenuation Factor (β = 0.09 A–1).
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Exceptionally Small Attenuation Factors in Molecular Wires
Journal of the American Chemical Society, 2004Co-Authors: Francesco Giacalone, Nazario Martín, José L. Segura, Dirk M. GuldiAbstract:Molecular-wire behavior, that is, an exceptionally small Attenuation Factor (β) of 0.01 ± 0.005 A-1, has been established in novel C60-based donor−acceptor ensembles covalently connected through a series of fully conjugated phenylenevinylene oligomers of precise length and constitution.
Yu. A. Prokhorenko - One of the best experts on this subject based on the ideXlab platform.
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Spatial structure and variability of fields of currents, Attenuation Factor of light, and temperature in the surface layer of the northwest part of the Black Sea
Physical Oceanography, 2000Co-Authors: E. A. Agafonov, S. T. Kaminsky, A. S. Kukushkin, Yu. A. ProkhorenkoAbstract:On the basis of the results of simultaneous observations of parameters of currents, Attenuation Factor of light, and temperature performed aboard a moving vessel, we established the main characteristics and features of the circulation of waters and the structure of transparency and temperature fields in the surface layer of the northwest part of the Black Sea. We investigate the correlation between the variability of fluid dynamics and redistribution of transparency and temperature fields. The measured currents are compared with those calculated using the actual field of atmospheric pressure during the time of observation. It is shown that the results obtained in the areas of steady currents in the west and central regions are in good agreement.
Huaizhen Chen - One of the best experts on this subject based on the ideXlab platform.
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Estimating elastic properties and Attenuation Factor from different frequency components of observed seismic data
Geophysical Journal International, 2019Co-Authors: Huaizhen ChenAbstract:SUMMARY Based on an Attenuation model, we first express frequency-dependent P- and S-wave Attenuation Factors as a function of P-wave maximum Attenuation Factor, and then we re-express P- and S-wave velocities in anelastic media and derive frequency-dependent stiffness parameters in terms of P-wave maximum Attenuation Factor. Using the derived stiffness parameters, we propose frequency-dependent reflection coefficient in terms of P- and S-wave moduli at critical frequency and P-wave maximum Attenuation Factor for the case of an interface separating two attenuating media. Based on the derived reflection coefficient, we establish an approach to utilize different frequency components of observed seismic data to estimate elastic properties (P- and S-wave moduli and density) and Attenuation Factor, and following a Bayesian framework, we construct the objective function and an iterative method is employed to solve the inversion problem. Tests on synthetic data confirm that the proposed approach makes a stable and robust estimation of unknown parameters in the case of seismic data containing a moderate noise/error. Applying the proposed approach to a real data set illustrates that a reliable Attenuation Factor is obtained from observed seismic data, and the ability of distinguishing oil-bearing reservoirs is improved combining the estimated elastic properties and P-wave Attenuation Factor.
Yue Xiao - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - Attenuation Factor Analysis for OFDM Signals with Peak Cancellation
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009Co-Authors: Wenling Bai, Lilin Dan, Yue XiaoAbstract:Abstract —Peak-cancellation is a pre-distortion technique for the system performance. According to Bussgang’s heorem [11], peak-to-average power ratio (PAPR) reduction in orthogonal the distortion is evaluated as signal Attenuation and nonlinear frequency division multiplexing (OFDM) systems. According to noise. In general, the distortion can be mitigated at the receiver [9], the distortion introduced to the transmitted signals can be on the condition that the signal Attenuation Factor is known at mitigated on the condition that the signal Attenuation Factor is the receiver [9]. For clipping-based technique, the Attenuation known at the receiver. In this paper, to alleviate the distortion Factor has been derived and evaluated in [4]. However, for and disclose the signal feature of peak-cancellation combined OFDM signals with peak cancellation, it still remains a OFDM signals, the signal Attenuation Factor is analyzed and problem to achieve the signal Attenuation Factor at the receiver.
