Kanagawa Institute of Technology Repository
Not a member yet
11637 research outputs found
Sort by
The Computer Simulation of the Resonant Motion between Three Lorenz Chaos Water Wheels by the Linear Coupling using Parallel Computation
Get PDFapplication/pdfWe had been interested in the increase of the complexity for the non-linear coupled oscillating system as the unit number changes from two to three. For the dynamics of assembly of the coupled non-linear oscillating systems, the relationship among the units can not be simply discussed, because the principle of the linear superposition can not be applied. We examined the complexity produced by the linear coupling of three non-linear oscillators. The coupling schemes were examined for the linear and circular network, respectively. Moreover, we discussed the increase of complexity which was produced by changing the coupling number from 2 to 3. Here, the increase of complexity was defined as the fluctuation of the pattern formation. The non-linear oscillator used was the Lorenz chaos water wheel model for which the parameter for obtaining the chaos solution was known. We tried the confirmationof the increase of the complexity by using chaos system which is the typical example of the non-linear pattern. We examined the rotary motion of three water wheels combined by the linear coupling of the resistance proportional to the difference of angular velocity. Calculations were performed by the parallel computer processing which assigned the processing of one water wheel to one processor. For our calculation system, time profile of the resonance motion of each water wheel was directly observed. When each coupling strength kl was 3[s-1], three time profiles existed in 5 conditions. These were the condition resonant with three, three 2 cluster conditions, and the condition that was not resonant with three. The change of each condition was not periodic. In case of the linear network, the condition that only the time series of central water wheel was not resonant was hardly confirmed. On the other hand, there was not such tendency in the circular network. Through the whole, the orbits which mapped the time series of water wheel onto three dimensional topological space by the Takens theory were almost isomorphic. Therefore, the increase of complexity by changing from 2 to 3 was suggested only for the state transition of the time series of three water wheels.departmental bulletin pape
Personal Authentication by 4 figure PIN using Keystroke Timing Pattern
Get PDFapplication/pdfIn this article, we propose a personal authentication method with Self-Organizing Maps (SOM) for Web based application. Information sharing on the World Wide Web (WWW), which is the most popular Internet service, is progressing rapidly today. Since WWW can cover the area crossed broadly, it is very effective as a means for information sharing. Unfortunately, with this global network access comes increased chances of malicious attack and intrusion. Traditional measures such as passwords and PINs are no longer adequate and we need to investigate more advanced safeguards against unauthorized access to Web based application. We tesed the system ability to measure FRR (False Rejection Rate) and FAR (False Acceptance Rate) on the map which is learning with 56 input-vectors. For result of this ability test, our system keeps FRR and FAR 25%. Thus it seems that our method is available for personal authentication.departmental bulletin pape
Places and Changes of Places in Kyogen Comedic Theatre Part II : Middle to Long-Distance Travels
Get PDFapplication/pdfThe actors of the Kyôgen comedic theatre perform an empty space of the Noh theatre. They almost never use stage sets; props are also minimal. Using dialogues and the actors' movement Kyôgen has developed simple and efficient ways to indicate places. Kyôgen characters, which range from masters, their servants, husbands and wives, to priests and merchants, go around places in their daily space, or make short trips, or sometimes travel considerable distances. In Part II of the treatise, we will examine middle to long-distance travels. They cover a vaiety of locations and character types much more so than observed in Part I, illuminating further the kinds of life the medieval Japanese, mostly common people, led.departmental bulletin pape
A Theory of Surface Landau Diamagnetism in exact formalism
Get PDFapplication/pdfAn exact proof is given that such a steady term in surface Landau diamagnetism =f(μ)H1 -γ (f(μ);of definite sign, γ>0) for H→0, is non-existent in any region a vanishes.departmental bulletin pape
Research Works Accomplished by Using the Electron Microscope System : XII
Get PDFapplication/pdfSome of the works that have been perfonned with the electron microscope system during the period of April 2000 to July 2001 are presented. They include: 1) Pore plugging ofmicrofiltration membrane by sub-micron particle, 2) Thennoreversible gelation of ethylene/1-hexene random oopolymer and morphology of gel, and 3) AFM observation of calcite surfilce after reaction with phosphate.departmental bulletin pape
Boost-Type AC-DC Converter with Constant Switching Frequency for Reduction of Harmonic Components in Input Current
Get PDFapplication/pdfA single-phase voltage-source type rectifier circuit generates many harmonic components in the input current. These generated harmonics mayc ause various disturbances in the utility's distribution. As the reduction method of these harmonics, a boost-type AC-DC converter with the hysteresis current control (HCC) is most frequently investigated. However, this control method has a major drawback that the switching frequency varies over a wide range. This brings forth a complicated ftlter design. In this paper, we propose the method for applying the PWM control with the constant switctting frequency to two types of boost-type AC-DC converter.This control method offers advantages like the fixed frequency of the generated harmonics and the simplified control signal generation. We obtain quantitatively the reduction effect of harmonic currents by the calculations, including the comparison between these two types of converter. From the results, it is clarified that this method is veiy effective and useful.departmental bulletin pape
Off-line Character Recognition Using Multiple 1-D Hidden Markov Model
Get PDFapplication/pdfThe purpose of our research is to improve the recognition rate of off-line character recognition systems using the HMM (Hidden Markov Model). Some 1-dimensional (1-D) HMM recognition systems have been proposed to increase the recognition rate of the conventional recognition systems. However, the 1-D HMM recognition systems have not achieved a sufficient recognition rate. On the other hand, 2-D HMM character recognition systems have been proposed to increase the representational power. However, the complex structure of 2-D HMM could not produce enough representational power with the actual small number of learning samples. To overcome these problems, we proposed a method using the multiple 1-dimensional HMM approach. In our experiment, the recognition rate of our multiple 1-D HMM method performed 97.1%, which was about 3% better than the conventional 1-D HMM systems, and as good as the 2-D HMM (HMM-MRF) system. Thus our method has better performance in practical use.departmental bulletin pape
Practical Use of Small Wind Turbine System at Cyogadake Hut
Get PDFapplication/pdfAt Cyogadalce hut (2776m above sea level) in the Japan Alps, we have confirmed the efficiency charactristics of a new type small wind turbine system in which electronics technique is applied to the control for the wind velocity. Moreover, in this paper we consider the simulation for hybrid generation system of this wind turbine and photovoltage based on the data of wind velocity and solar radiation at the local weather bureau station in Matsumoto, which is the nearest station from the hut, measured by the Meteorological Agency.departmental bulletin pape
<La Petite Roque> and <Soncho, the Mayor> : An Adaptation or a Translation ?
Get PDFapplication/pdfdepartmental bulletin pape
Parallel Computing by RPC
Get PDFapplication/pdfIn this paper, we confirm that the large problem can be performed very fast by RPC (Remote Procedure Call) on some distributed WindowsNT workstations. And we discuss possibility of high performance, usability and low cost computing system, consist of PC workstations. Today, PC neiwork sysiem, such as Local Area Network, exists as an usual environment. We think that is instructive that discussion of a way to make good use of that system, and moreover, in the near future's retired workstations those are working as main machine now.departmental bulletin pape