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Experimental Verification of Wireless In-Wheel Motor Using Magnetic Resonance Coupling
Motoki Sato,Gaku Yamamoto,Takehiro Imura,Hiroshi Fujimoto 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
Electric Vehicles (EVs) are used widely because of their environmental benefits. Above all, the in-wheel motor system has excellent performance with regards to motion control [1] [2]. On the other hand, the power lines and signal lines of the in-wheel motor system are exposed to the external environment. In addition, the power and signal lines might become disconnected between the car chassis and the in-wheel motor because of vibrations from the harsh load. In order to overcome this problem, the Wireless In-Wheel Motor (WIWM) has been proposed by the authors [3]. Recently many papers about Wireless Power Transfer applied to vehicles have been published [4-9]. The Wireless In-Wheel Motor system is a vehicle drive system that takes advantage of the power wirelessly transferred to the load, thus nullifying the issue of disconnection of power lines and signal lines. The authors have developed this Wireless In-Wheel Motor system and evaluated it by experimental test.
Project Assessment by Deliberative Democracy-Based Participation in Government
Motoki NAGANO 한국도시행정학회 2013 한국도시행정학회 학술발표대회 논문집 Vol.2013 No.9
We explore project assessment by an instrument of deliberative democracy, through a case study of the Citizen Conference on the Second Municipal Implementation Plan for Shinjuku City, Tokyo, held in 2011. A "Citizen Conference" is a deliberative democracy method that uses random sampling of residents for recruitment and offers those residents the opportunity to participate in deliberations over policy issues in small groups. The method was devised in the Japanese civil sector, based on planning cells in Germany. The Shinjuku conference in 2011 had interesting outcomes, especially with regard to the proposals that were accepted by the municipal government. In this research, we investigate three hypotheses related to (1) the character of issues, (2) the promotion of social learning, and (3) bureaucratic action norms, which correspond to the three I"s (interest, information, and identity). Our aim is to analyze why Shinjuku"s municipal government bureaucracy accepted more proposals from the Citizen Conference than from other citizen-participation tools, such as public comments. In addition, we find that "creative destruction" in administrative routine and richness of information are decisive features that the citizen conference method offers in the policy planning process.
The Analysis of Output from PV Power Station to Estimate Generation Reserve for Frequency Regulation
Akatsuka, Motoki,Hara, Ryoichi,Kita, Hiroyuki,Takitani, Katsuyuki,Yamaguchi, Koji The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.4
As a solution for the global environmental issues and energy resource depletion issue, photovoltaic generation (PV) has been installed rapidly. However, PV generation output heavily depends on climatic conditions and it would give negative impacts on balancing between supply and demand in power systems. In order to secure the power quality, the unstable output from the natural energy resource driven generators should be considered directly in usual power system operations such as supply and demand balancing. The solar radiation forecast would take a key role in the future operation of power system; therefore, investigation of performance and its characteristics of the forecast accuracy is important. In this paper, standard deviation and time series characteristics of solar radiation forecast error are statistically estimated. This paper also develops a First-order Markov process model for solar radiation forecast error.
KEY SCIENCE OBSERVATIONS OF AGNs WITH THE KaVA ARRAY
KINO, MOTOKI,NIINUMA, KOTARO,ZHAO, GUANG-YAO,SOHN, BONG WON The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
KaVA (KVN and VERA Array) is a new combined VLBI array composed of KVN (Korean VLBI Network) and VERA (VLBI Exploration of Radio Astrometry). Here, we report the following two issues. (1) We review the initial results of imaging observations of M87 at 23 GHz following Niinuma et al. (2014). The KaVA images reveal extended outflows including complex substructures such as knots and limb-brightening, in agreement with previous VLBI observations. KaVA achieves a high dynamic range of ~1000, more than three times better than that achieved by VERA alone. (2) Based on subsequent observations and discussions led by the KaVA AGN SubWorking Group, we set monitoring observations of Sgr $A^{\ast}$ and M87 as our Key Science Project (hereafter KSP) because of the closeness and largeness of their central super-massive black holes. The main science goals of the KSP are (i) testing the magnetically-driven-jet paradigm by mapping velocity fields of the M87 jet, and (ii) obtaining tight constraints on physical properties of the radio emitting region in Sgr $A^{\ast}$. Towards KSP, we show the first preliminary images of M87 at 23 GHz and Sgr $A^{\ast}$ at 43 GHz with the bandwidth of 256 MHz.