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Fault Diagnosis Based on Likelihood Decomposition
Katsuji Uosaki,Tetsuo Kagawa 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
A novel fault diagnosis method based on likelihood decomposition is proposed for linear stochastic systems described by autoregressive (AR) model. Assuming that at some time instant γ the fault of one of the following two types is occurs: innovation fault (actuator fault); and observation fault (sensor fault), the log-likelihood function is decomposed into two components based on the observations before and after γ, respectively, Then, the type of the fault is determined by comparing the log-likelihoods corresponding two types of faults. Numerical examples demonstrate the usefulness of the proposed diagnosis method.
Nara Katsuji 일본사학회 2013 일본역사연구 Vol.38 No.-
In this paper, the basic condition that became the premise of the various political trends in the Meiji Restoration will be considered from the point of view of “sovereignty” and “nation.” Researchers until now have been considered that the will of people in the Edo period is not reflected in society. They also have been considered that the Meiji Restoration was a democratic movement that opposed the dictatorship. It is, however, my argument that the aforementioned understanding is not correct. In recent years, researchers in the field of International Relations have reviewed the received theory that sovereign state system was established in the mid 17 th century in Europe and promoted the deconstruction of so-called the Myth of Westphalia. However, the matter they have denied is not external sovereignty, but internal sovereignty. In other words, in Europe, external sovereignty was established first, and the democratic movement of people and penetration of internal sovereignty had been advanced under this condition. A reverse process had been in progress in Japan. Of course, researchers recently have pointed out that there existed movements of goods, informations, and humen from abroad to the “mouth of the four” in the Edo period: Matsumae, Tsushima, Nagasaki, Ryukyu. However, “diplomacy” in that situation was thoroughly an indirect one and was not monopolized by the Tokugawa Shogunate. In other words, the power structure was decentralized. In the Meiji Restoration, councilor of Tokugawa Shogunate could not get a valid response to this contradiction and the government fell into chaos. In that time, it was more of how to produce external sovereignty and national will against the overflowing will of people than of how to increase people will against the dictatorship that was essential.
Nakajima, Katsuji,Yoshimoto, Shigetoshi,Kawakami, Yoichi,Hashimoto, Yukio,Takeda, Osamu,Tuchihashi, Yasue,Uno, Seiichi 통신위성우주산업연구회 2000 Joint Conference on Satellite Communications Vol.2000 No.-
An Onboard Processor (OBP) that can perform base-band circuit switching has been designed for in-orbit mobile satellite communications experiments using Japanese Engineering Test Satellite VIII (ETS-VIII). The Onboard Processor can exchange both 5.6 kbps voice and 32 kbps data using the MC-TDMA access method and can provide about 1,000 channels with digital signal processing techniques.