Mitsubishi

About: Mitsubishi is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 53115 authors who have published 54821 publications receiving 870150 citations. The organization is also known as: Mitsubishi Group of Companies & Mitsubishi Companies.

Thin film piezoelectric element

Abstract: A thin film piezoelectric element comprising a substrate, a lower electrode formed on one side of the substrate, a piezoelectric thin film formed on the lower electrode, and a first upper electrode formed on the piezoelectric thin film, wherein the thin film piezoelectric element further comprises a second upper electrode formed on the outside of the first upper electrode formed on the piezoelectric thin film when viewed from the center of the first upper electrode and having a mass load larger than that of the first upper electrode and the piezoelectric thin film has high-pass cut-off dispersion characteristics The cut-off frequency of the second upper electrode part piezoelectric having a high mass load can be set lower than the cut-off frequency of the first upper electrode part piezoelectric and the energy of elastic wave can be confined in a region on the first upper electrode part, whereby a good performance can be realized

Process for removing carbon dioxide from combustion gases

Abstract: A process for removing CO₂ from a combustion gas which comprises removing CO₂ from the combustion gas through contact of an aqueous hindered amine solution used as a CO₂ absorbent solution with the combustion gas at atmospheric pressure and then, in a regeneration column, liberating CO₂ from the absorbent solution that has absorbed CO₂ by heating it and thereby regenerating the absorbent solution. The process further comprises a partial absorbent solution regeneration step in at least one stage wherein the absorbent solution that has absorbed CO₂ is heated through heat exchange with a high-temperature regenerated absorbent solution and part of the CO₂ that is liberated is separated from the absorbent solution. Following this, according to the necessity, part of the partially regenerated absorbent solution thus obtained is returned to the step of removing CO₂ from the combustion gas for use as part of the CO₂ absorbent solution while the rest or all of the absorbent solution is heated and fed to a regeneration column further to liberate CO₂ and regenerate the absorbent solution.

Individual identification recognition system

Abstract: An individual identification recognition system for judging whether a card possessor is an authorized card user. The system includes a card storing a fingerprint of the authorized card user, a card reader into which the card is inserted, and which reads the fingerprint of the card possessor and a judging means for judging whether a card possessor is an authorized card user based upon the result of a comparison of the fingerprint of the card possessor taken in by the card reader with the fingerprint registered in the card, which judging means can be provided in the card or the card reader.

Amplitude estimation without phase estimation

Abstract: This paper focuses on the quantum amplitude estimation algorithm, which is a core subroutine in quantum computation for various applications. The conventional approach for amplitude estimation is to use the phase estimation algorithm, which consists of many controlled amplification operations followed by a quantum Fourier transform. However, the whole procedure is hard to implement with current and near-term quantum computers. In this paper, we propose a quantum amplitude estimation algorithm without the use of expensive controlled operations; the key idea is to utilize the maximum likelihood estimation based on the combined measurement data produced from quantum circuits with different numbers of amplitude amplification operations. Numerical simulations we conducted demonstrate that our algorithm asymptotically achieves nearly the optimal quantum speedup with a reasonable circuit length.

Highly active quasicrystalline Al-Cu-Fe catalyst for steam reforming of methanol

Abstract: Steam reforming of methanol (CH 3 OH+H 2 O→3H 2 +CO 2 ) has been performed on a stable AlCuFe quasicrystal for the first time. The AlCuFe quasicrystal reveals excellent activity, after leaching treatment. The production rate of H 2 reaches 235 l/kg min at 573 K for steam reforming of methanol. The activity is due to Cu nanoparticles at the surfaces of quasicrystalline grains which are generated by the leaching treatment. The quasicrystals have two advantages: one is their brittle nature, which allows them to be crushed efficiently; the other is the involvement of Fe, which suppresses the sintering of Cu particles.