start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=239
end-page=248
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=A GRAPH-THEORETIC STUDY OF THE MINIMUM FILL-IN PROBLEM FOR SPARSE MATRIX METHOD
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper the minimum fill-in problem which arises at the application of the sparse matrix method for linear sparse systems is discussed from the graphtheoretic viewpoint and the author gives some results which can be directly introduced in the design of, so called, the optimal elimination ordering algorithm which gives the minimum fill-in(the number of zeros in coefficient matrix which become non-zero during the elimination process). Through this investigation only graphs are treated instead of the coefficient matrices for linear systems, and the elimination process for a matrix is equivalated to the vertx eliminations for the graph. Then, the results by the theoretical investigation are summarized as following: 1. Optimal elimination for each subgraph which is subdivided
appropriately from whole graph leads to the global optimum.
2. In each subgraph there are only two kind of eliminations. Furthermore, some numerical experiments show the characteristics of the subset of vertices, which subdivide a subgraph from the residual.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=TaniguchiTakeo
kn-aut-sei=Taniguchi
kn-aut-mei=Takeo
aut-affil-num=1
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Civil Engineering
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=181
end-page=193
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=A Notion of Adjoint Spectrum in the Application to Air-pollution Monitoring
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=This report deals with a notion of adjoint spectrum which is applicable to air-pollution monitoring by using pulsed lasers. Both Raman and absorption spectra of multiple gas complex are linear combinations of the spectra, each of which is specific to a gas species and its magnitude is proportional to the density. An extended formulation of the method of least squares is made in terms of a new notion, adjoint spectra, which visualizes the structure of the numerical filter. Applications of the derived numerical filters to the two methods are shown and features are described about the synthesized filters.
en-copyright=
kn-copyright=
en-aut-name=SanoHiroya
en-aut-sei=Sano
en-aut-mei=Hiroya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=KogaRyuji
en-aut-sei=Koga
en-aut-mei=Ryuji
kn-aut-name=Γκ²‘
kn-aut-sei=Γκ
kn-aut-mei=²‘
aut-affil-num=2
ORCID=
en-aut-name=TanadaYoshihiro
en-aut-sei=Tanada
en-aut-mei=Yoshihiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KosakaMegumi
en-aut-sei=Kosaka
en-aut-mei=Megumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
affil-num=1
en-affil=
kn-affil=Department of electronics
affil-num=2
en-affil=
kn-affil=Department of electronics
affil-num=3
en-affil=
kn-affil=Department of electronics
affil-num=4
en-affil=
kn-affil=Department of electronics
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=195
end-page=207
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=A Performance Analysis For An Air-Pollution Monitoring Using A Pulsed Dye Laser
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The maximally attainable accuracy of an airpollution monitoring system is investigated. The system is composed of a tunable pulsed dye laser as the light source, photodiodes as the opto-electric converter and a low noise electronic signal processor specifically designed by the authors. The extreme value of the accuracy is given in terms of the standard deviation of the attenuation. The value is 3.4~10(-4)[Nepγ(pulse number)] for an averaged value for multiple laser shots. Also the wavelength reproduceability of a dye laser was examined, which resulted in that a computer should take a part in the wavelength control in order that this method should be feasible.
en-copyright=
kn-copyright=
en-aut-name=SanoHiroya
en-aut-sei=Sano
en-aut-mei=Hiroya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=KogaRyuji
en-aut-sei=Koga
en-aut-mei=Ryuji
kn-aut-name=Γκ²‘
kn-aut-sei=Γκ
kn-aut-mei=²‘
aut-affil-num=2
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=TanadaYoshihiro
kn-aut-sei=Tanada
kn-aut-mei=Yoshihiro
aut-affil-num=3
ORCID=
en-aut-name=KosakaMegumi
en-aut-sei=Kosaka
en-aut-mei=Megumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
affil-num=1
en-affil=
kn-affil=Department of electronics
affil-num=2
en-affil=
kn-affil=Department of electronics
affil-num=3
en-affil=
kn-affil=Department of electronics
affil-num=4
en-affil=
kn-affil=Department of electronics
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=163
end-page=180
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=A Walsh Waoofonn Analyzer and Its Applications to Filtering of Pulse Signals
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A new waveform analyzer based on the Walsh transform@is developed and is applied to a real-time filtering of fast pulse signals, and the linear filterings@of time signals through the Walsh transform is@discussed. The analyzer converts a solitary waveform during 16 Κs into the 16 Walsh amplitude spectra in a hybrid manner: it has the sequency band from 62.5 kzps to 500 kzps. The spectra are parallelly held during 16 Κs by analog integrators, while serially displayed by the CRT, and one of them is digitally read out. The spectra of the test waves are measured within the error rate of several per cent. The analyzer is applied to the correlative detection of the photoelectric pulse signals in a gasspectroscopic system using a pulse laser, and there composes the matched filter, which is useful for measuring the signals superposed by Gaussian noises with a high accuracy. For the real-time filtering of fast signals, the arithmetic convolution and the frequency power spectra are approximated using the complex Walsh transform.
These approximations are of practical use in 16 or 32 dimensions. Then, the matched filters for pulse peaking are given by the approximate convolution and by the dyadic convolution.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=TanadaYoshihiro
kn-aut-sei=Tanada
kn-aut-mei=Yoshihiro
aut-affil-num=1
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=SanoHiroya
kn-aut-sei=Sano
kn-aut-mei=Hiroya
aut-affil-num=2
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Electronics
affil-num=2
en-affil=
kn-affil=Department of Electronics
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=53
end-page=64
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=AC Chopper Circuit with Lagging Reactive Load
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=An ac chopper circuit, which chops an ac voltage in a complete cycle for any lagging reactive load, is devised. The circuit is constructed of two ac-switches composed of power transistors and diodes. The load voltage is smoothly controlled by varying the time ratio of ac-switch. Transistors operate in a highfrequency chopping mode, thereby the ripples of the source current and the load current are easily filtered. Furthermore the input power factor of this model is better than that of the thyristor phase control circuit. In this paper, the construction and the driving method of this model are described.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=FunabikiShigeyuki
kn-aut-sei=Funabiki
kn-aut-mei=Shigeyuki
aut-affil-num=1
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NakanishiSenichiro
kn-aut-sei=Nakanishi
kn-aut-mei=Senichiro
aut-affil-num=2
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=HimeiToyoji
kn-aut-sei=Himei
kn-aut-mei=Toyoji
aut-affil-num=3
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Electrical Engineering
affil-num=2
en-affil=
kn-affil=Department of Electrical Engineering
affil-num=3
en-affil=
kn-affil=Department of Electrical Engineering
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=133
end-page=152
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Aging and Reversion in Dilute Al-Ag Alloys
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Aging and reversion in dilute Al-Ag alloys are studied by means of the measurements of electrical resistivity. Results obtained are as follows: 1) Increase in the as-quenched resistivity is found for a low quenching temperature. This increase may be due to the fluctuation of solute concentration at the quenching temperature. 2) When the fluctuation exists in the alloy, the aging rate becomes slow and the maximum resistivity in the isothermal aging curve becomes small as the vacancyconcentration becomes low. The maximum resistivity becomes large again when the vacancy concentration becomes further lower, and finally the maximum does not appear. 3) These behaviors are explained in terms of the difference in the rate of growth of the G.P. zones in the regions of higher and lower solute concentration induced by the fluctuation and in terms of the change of this difference with vacancy concentration. 4) G.P. zones may be formed by the spinodal decomposition with indefinite surfaces at first, grown to larger ones with difinite surfaces and changed to ordered nzones in the alloy. 5) It is confirmed that G.P. zones are formed by the nucleation-and-growth mechanism also in Al-Ag alloys above the spinodal temperature.
en-copyright=
kn-copyright=
en-aut-name=OhtaMutsuo
en-aut-sei=Ohta
en-aut-mei=Mutsuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=KanadaniTeruto
en-aut-sei=Kanadani
en-aut-mei=Teruto
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=YamadaMasuo
en-aut-sei=Yamada
en-aut-mei=Masuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=SakakibaraAkira
en-aut-sei=Sakakibara
en-aut-mei=Akira
kn-aut-name=ε΄Έ
kn-aut-sei=ε΄
kn-aut-mei=Έ
aut-affil-num=4
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Industrial Science
affil-num=2
en-affil=
kn-affil=Okayama University of Science
affil-num=3
en-affil=
kn-affil=Department of Industrial Science
affil-num=4
en-affil=
kn-affil=Department of Industrial Science
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=225
end-page=238
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=An Adaptive Observer via Optimal Control Law
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=This paper deals with the adaptive observer which estimates the states and parameters of unknown system. It is shown that the adaptive observer problem is reduced to the identification of the transformation matrix for an arbitrary designable observer. Moreover, the adaptive process of the unknown parameters is reduced to the linear optimal regulator problem. As the result, a new method is presented to obtain an appropriate adaptive process with good insight. And, in this identification, a linear filter is found to be also useful against noises in input-output data. To achieve high accuracy, a particular nonlinear
filtering can improve SN ratio only in the direction of the unknown vector. Even if SN ratio of input-output data has zero dB, sufficient accuracy can be accomplished within suitable correction time. This design algorithm seems to be rather straightforward and practical. Since input sequence is required to be only sufficiently general, the method
is applicable to on-line identification also.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KanedaMasahiro
kn-aut-sei=Kaneda
kn-aut-mei=Masahiro
aut-affil-num=1
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=ShinjiHiroshi
kn-aut-sei=Shinji
kn-aut-mei=Hiroshi
aut-affil-num=2
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=AoyamaMikio
kn-aut-sei=Aoyama
kn-aut-mei=Mikio
aut-affil-num=3
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Electronics
affil-num=2
en-affil=
kn-affil=Nissan Chemical Corp
affil-num=3
en-affil=
kn-affil=Department of Electronics
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=249
end-page=258
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Asymptotic Theory of Rayleigh Problem in Rarefied Gas
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The asymptotic theory of Rayleigh shear flow for large values of time is developed on the basis of the linearized Boltzmann-Krook equation. Asymptotic equations for mean velocity outside the Knudsen layer are obtained by employing the Hilbert expansion. Slip boundary conditions are derived from the analysis of the Knudsen layer adjacent to the wall. A solution of the asymptotic equation is obtained under the slip boundary condition and zero initial condition. Discussions are also made of the flow induced by a slowly oscillating flat plate.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=YamamotoKyoji
kn-aut-sei=Yamamoto
kn-aut-mei=Kyoji
aut-affil-num=1
ORCID=
affil-num=1
en-affil=
kn-affil=Engineering Mathematics
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=45
end-page=52
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Basic Characteristics of Squarewave Irwerter Circuit with Series R-L Load
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper, the steady state operations of the
squarewave inverter circuit with a series R-L load are
discussed. The circuit consists of transistors and
feedback diodes. The basic equation is derived from its
equivalent circuit. Solving the basic equation with
steady state conditions, the instaneous value of the
load current i is derived. The period t(2) for which the
current flows from the supply to the load and the
period t(l) for which the current feedbacks through diodes
from the load to the supply are calculated from (i), and
the ratio of t(l) to t(2) is illustrated using power factor
of fundamental wave, pf, as a variable. The ratios of
transistor mean current I(tr), diode mean current I(D),
supply mean current I(s) to the load current I are illustrated using pf as a variable, too. In result, each current ratios to I is shown in simple expressione. The load current can be calculated simply using the coefficient reading off the figure. In addition, it becomes clear from the figure that the load current is scarcely influenced by the harmonic voltage in less than 0.8 of pf. The ratio t(2)/(t(1)+t(2)) calculated in squarewave voltage, shows the limit of pulse width control whose out put voltage is the squarewave.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=FujitsukaTakeshi
kn-aut-sei=Fujitsuka
kn-aut-mei=Takeshi
aut-affil-num=1
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=AgusaToru
kn-aut-sei=Agusa
kn-aut-mei=Toru
aut-affil-num=2
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Electrical Engineering
affil-num=2
en-affil=
kn-affil=Graduate School of Electrical Engineering
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=65
end-page=81
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Computer Program for Numerical Evaluation of the work
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We try to evaluate the manual work numerically from a point of view of the homogeneousness and the simultaneousness of both hands using the results of the micromotion study. The weighted coefficient and the balance index are used to evaluate the homogeneousness of both hands. And the simultaneous index is used to evaluate the simultaneous movement of both hands. It is necessary to make a program in order to use efficiently the method to calculate the indexes or the coefficients. Therefore the computer program of these methods is mentioned in this paper.
en-copyright=
kn-copyright=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=UshioJunichi
kn-aut-sei=Ushio
kn-aut-mei=Junichi
aut-affil-num=1
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=OsakiHirokazu
kn-aut-sei=Osaki
kn-aut-mei=Hirokazu
aut-affil-num=2
ORCID=
en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KikuchiSusumu
kn-aut-sei=Kikuchi
kn-aut-mei=Susumu
aut-affil-num=3
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Industrial Science
affil-num=2
en-affil=
kn-affil=Department of Industrial Science
affil-num=3
en-affil=
kn-affil=Department of Industrial Science
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=83
end-page=93
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19790305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Computer Program of Line Balancing, Regarding Efficiency and Number of Stations as Variables
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=To assign work elements to the work stations in an assembly or manufacturing line, various computer programs have been developed and used. And it does that the number of stations or the cycle time is even given. But in practice it is desirable to obtain the assignment which shows the highest efficiency of line balancing under all possible combinations of the number of stations and the cycle time. Therefore we propose a computer program of the assignment method in which the efficiency of line balancing, Ebb and the number of stations, NN are regarded as variables. In this method the minimum value (EEb) of efficiency and the constant term (d) by which Ebb is reduced are given previously. And for any COmbination of Ebb (EE