This paper presents the measurement results obtained in an extensive field test campaign developed in two large cities of Spain (Madrid and Bilbao) with the aim of characterizing the portable outdoor reception of digital terrestrial television (COFDM) and continue the studies carried out by the authors during the past years [1], [2].

The operating characteristic of two-phase rotating detonation fueled by kerosene in a hollow combustor with the isolation section is experimentally studied. When air mass flow rate 1.5 kg/s, equivalence ratio 0.98, and total temperature mixture 650 K, stable wave (RDW) obtained, which verifies feasibility designed (RDC). It found that there high-frequency oblique shock induced upstream section....

A novel optical millimeter-wave generation using sideband injection locking is demonstrated using monolithic two-section DFB lasers. The tunable millimeter-wave is generated by adjusting the RF-modulation frequency and bias currents. Summary The optical generation of millimeter-wave has been demonstrated and attracted much attention because of its flexibility and applicability in broadband mobi...

Background and Aims: Production of acoustic cavitation by sonication has been recently recommended as a targeted treatment. The experimental results from studies indicate that the activity of cavitation generated by bi- or multi-frequency ultrasound irradiation is higher than that caused by single frequency irradiation. In this study, effects dual (1 MHz and 40 kHz) and single frequency soni...

A continuation method is presented for solving the inverse medium scattering problem of the Helmholtz equation in R. The algorithm requires only single-frequency scattering data. Using an initial guess from the Born approximation, each update is obtained via recursive linearization on the spatial frequency of a one-parameter family of plane waves by solving one forward and one adjoint problem o...

With the exploration of multiple antennas at transmitter and possibly also at receiver end, the original concept of UMTS (universal mobile telecommunications system), specified within 3GPP (3rd-generation partnership project), needs to be reconsidered. While the so-called MIMO (multiple-input multiple-output) techniques promise huge improvements in spectral efficiency, in general, once constrai...

This paper investigates the lateral vibration of single-layered graphene sheets based on a new theory called doublet mechanics with a length scale parameter. After a brief reviewing of doublet mechanics fundamentals, a sixth order partial differential equation that governs the lateral vibration of single-layered graphene sheets is derived. Using doublet mechanics, the relation between natural f...

We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-polemodulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB ba...