Institution
University of Electro-Communications
Education•Tokyo, Japan•
About: University of Electro-Communications is a education organization based out in Tokyo, Japan. It is known for research contribution in the topics: Laser & Robot. The organization has 8041 authors who have published 16950 publications receiving 235832 citations. The organization is also known as: UEC & Denki-Tsūshin Daigaku.
Topics: Laser, Robot, Fiber laser, Mobile robot, Control theory
Papers published on a yearly basis
Papers
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30 Oct 1989TL;DR: In this article, two complexity classes, PP and (+)P, are compared with PH (the polynomial-time hierarchy), and the main results are as follows: (1) every set in PH is reducible in a certain sense to a set in PP, and (2) every pair in PH are reducible to a pair of sets in PP under randomized (2-sided) reducibility with two-sided bounded error probability.
Abstract: Two complexity classes, PP and (+)P, are compared with PH (the polynomial-time hierarchy). The main results are as follows: (1) every set in PH is reducible in a certain sense to a set in PP, an (2) every set in PH is reducible to a set in (+)P under randomized polynomial-time reducibility with two-sided bounded error probability. It follows from these results that neither PP nor (+)P is a subset of or equivalent to PH unless PH collapses to a finite level. This is strong evidence that both classes are strictly harder than PH. >
268 citations
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TL;DR: In this article, the relation between thermal anomalies and seismic activity was established for Middle Asia on the basis of a 7-year series of thermal images, and the analysis of digital images for Japan shows the following: (a) the anomaly appears 7-10 days before shock; (b) the anomalies in Japan have small size; (c) probably, thermal anomaly is located in Kanto area and the magnitude of anomaly run up to 6°C; (d) the tectonic position of anomalies is not clear now.
268 citations
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TL;DR: All the tungstates are classified as promising media for lasers and neodymium-doped crystals for self-stimulated Raman scattering lasers.
Abstract: Spectroscopic, laser, and chi((3)) nonlinear optical properties of tetragonal PbWO(4), NaY(WO(4))(2), CaWO(4), and monoclinic CdWO(4) and ZnWO(4) were investigated. Particular attention was paid to Nd(3+)-doped and undoped PbWO(4) and NaY(WO(4))(2) crystals. Their absorption and luminescence intensity characteristics, including the peak cross sections of induced transitions, were determined. Pulsed and continuous-wave lasing in the two 4F(3/2)-->4I(11/2) and 4F(3/2)-->4I(13/2) channels was excited. For these five tungstates, highly efficient (greater than 50%) multiple Stokes generation and anti-Stokes picosecond generation were achieved. All the observed scattered laser components were identified. These results were analyzed and compared with spectroscopic data from spontaneous Raman scattering. A new crystalline Raman laser based on PbWO(4) was developed for the chi((3)) conversion frequency of 1-microm pump radiation to the first Stokes emission with efficiency up to 40%. We classify all the tungstates as promising media for lasers and neodymium-doped crystals for self-stimulated Raman scattering lasers.
268 citations
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TL;DR: The measured absorption spectra agreed well with the ab initio calculations of band structure based on the local density function approximation, and the absorption bands are assigned to the dipole transitions between the Van Hove singularities.
Abstract: We report the polarized optical absorption spectra of single-walled $4\AA{}$ carbon nanotubes arrayed in the channels of an $\mathrm{AlPO}{}_{4}\ensuremath{-}5$ single crystal. When the light electric field $(E)$ is polarized parallel to the tube direction $(c)$, the spectra display a sharp peak at 1.37 eV, with two broadbands at 2.1 and 3.1 eV. In the $E\ensuremath{\perp}c$ configuration, the tube is nearly transparent in the measured energy region 0.5--4.1 eV. The optical dipole selection rules are discussed, and the absorption bands are assigned to the dipole transitions between the Van Hove singularities. The measured absorption spectra agreed well with the ab initio calculations of band structure based on the local density function approximation.
267 citations
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TL;DR: Efficient job caching is proposed to better schedule jobs based on the information collected on neighboring vehicles, including GPS information, and a scheduling algorithm based on ant colony optimization is designed to solve this job assignment problem.
Abstract: With the emergence of in-vehicle applications, providing the required computational capabilities is becoming a crucial problem. This paper proposes a framework named autonomous vehicular edge (AVE) for edge computing on the road, with the aim of increasing the computational capabilities of vehicles in a decentralized manner. By managing the idle computational resources on vehicles and using them efficiently, the proposed AVE framework can provide computation services in dynamic vehicular environments without requiring particular infrastructures to be deployed. Specifically, this paper introduces a workflow to support the autonomous organization of vehicular edges. Efficient job caching is proposed to better schedule jobs based on the information collected on neighboring vehicles, including GPS information. A scheduling algorithm based on ant colony optimization is designed to solve this job assignment problem. Extensive simulations are conducted, and the simulation results demonstrate the superiority of this approach over competing schemes in typical urban and highway scenarios.
266 citations
Authors
Showing all 8079 results
Name | H-index | Papers | Citations |
---|---|---|---|
Mildred S. Dresselhaus | 136 | 762 | 112525 |
Matthew Nguyen | 131 | 1291 | 84346 |
Juan Bisquert | 107 | 450 | 46267 |
Dapeng Yu | 94 | 745 | 33613 |
Riichiro Saito | 91 | 502 | 48869 |
Shun-ichi Amari | 90 | 495 | 40383 |
Shigeru Nagase | 76 | 617 | 22099 |
Ingrid Verbauwhede | 72 | 575 | 21110 |
Satoshi Hasegawa | 69 | 708 | 22153 |
Yu Qiao | 69 | 484 | 29922 |
Yukio Tanaka | 68 | 744 | 19942 |
Zhijun Li | 68 | 614 | 14518 |
Iván Mora-Seró | 67 | 235 | 23229 |
Kazuo Tanaka | 63 | 535 | 27559 |
Da Xing | 63 | 624 | 14766 |