JaLCDOI 10.18926/15653
FullText URL Mem_Sch_Eng_OU_7_2_85.pdf
Author Nakata Takayoshi| Ishihara Yoshiyuki|
Abstract A new method for representing distorted wave forms is investigated. The method suggested by us is a modified vector symbolic method. It has been hitherto thought that the vector symbolic method cannot be applied to the distorted waves, because the rotating speeds of each harmonic vector are not identical. Representing the argument of the n-th harmonic vector by l/n times as large as the phase angle of the harmonic component, the relative positions of respective harmonic vectors are invariable wherever the standard vector is put, and the wave shape can be deduced from the vector diagram. We found various correspondences between the wave forms and the vector diagrams. Therefore, the wave shape can be estimated from the vector diagram, and the mutual relationships between two wave forms can also be known. In electric or magnetic circuits, the causes of distorted wave forms are in general obvious. Therefore, there are very often the fixed relationships between the amplitudes and phase angles of the harmonics. Further, in polyphase a.c. circuits, there are often the fixed relationships between corresponding harmonics in the wave forms of the respective phases. When the wave forms of those circuits are discussed, the new method investigated in this paper may offer a useful key.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1972-10-13
Volume volume7
Issue issue2
Start Page 85
End Page 88
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307535
JaLCDOI 10.18926/ESR/13902
FullText URL ESR_7_47.pdf
Author Yamagiwa Nobuo| Suzuki, Shigeyuki| Okimura Yuji|
Abstract A new rugose coral species, Lithostrotion (Siphonodendron) hinensis is described in this paper. It was collected from the Carboniferous Hina limestone in Okayama Prefecture, Southwest Japan. Judging from the paleontological data, the age indicates probably Late Viaean, Early Carboniferous.
Keywords Early Carboniferous rugosa Lithostrotion (Siphonodendron) Hina Limestone Okayama
Publication Title Okayama University Earth Science Report
Published Date 2000-09-20
Volume volume7
Issue issue1
Start Page 47
End Page 50
ISSN 1340-7414
language 英語
Copyright Holders 岡山大学地球科学研究報告編集委員会
File Version publisher
NAID 120002310319
JaLCDOI 10.18926/52099
FullText URL hss_036_101_110.pdf
Author Yoshioka, Fumio|
Publication Title 岡山大学大学院社会文化科学研究科紀要
Published Date 2013-11-26
Volume volume36
Start Page 101
End Page 110
ISSN 1881-1671
language 英語
Copyright Holders Copyright © 2013 岡山大学大学院社会文化科学研究科
File Version publisher
NAID 120005365985
Author Agatsuma, Satoshi|
Published Date 2011-03-25
Publication Title 文化共生学研究
Volume volume10
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/11521
FullText URL 007_031_038.pdf
Author Zhang, Fanghong| Tanaka, Yutaka|
Abstract Relationship has been discussed by Tanaka and Zhang(1999) between the sensitivity analyses based on influence functions and on Cook's local influence, and it has been shown that equivalent results are obtained under general conditions by these analyses in statistical modeling without/with equality constraints. However, a condition implicitly assumed in the proof in Tanaka and Zhang(1999) in the case with equality constraints does not necessarily hold. The present paper gives a complete proof without assuming the condition. Also a formula for the normal curvature is derived for the convenience of practical computation.
Keywords Local influence influence function equality constraints
Publication Title 岡山大学環境理工学部研究報告
Published Date 2002-03-22
Volume volume7
Issue issue1
Start Page 31
End Page 38
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313336
JaLCDOI 10.18926/15568
FullText URL Mem_Sch_Eng_OU_2_23.pdf
Author Yoshii Tensho| Kikuchi Susumu|
Abstract The problem of the optimal assignment of facilities to locaticns has been solved by J.W. Gavett and Normann V.Plyter. In their paper the branch and bound technique is used and for this purpose the distance matrix is transformed into the matrix whose diagonal compoents are zero. The purpose of this paper is to avoid such a transformation and the store of the distance matrix into the computer.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1967-04-01
Volume volume2
Issue issue1
Start Page 23
End Page 25
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307907
JaLCDOI 10.18926/15722
FullText URL Mem_Sch_Eng_OU_13_181.pdf
Author Sano, Hiroya| Koga, Ryuji| Tanada, Yoshihiro| Kosaka, Megumi|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1979-03-05
Volume volume13
Start Page 181
End Page 193
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307476
Author Tahara, Makoto| Yamashita, Hiroki|
Published Date 2007-02
Publication Title 岡山大学農学部学術報告
Volume volume96
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/11594
FullText URL 005_153_158.pdf
Author Ye, Xuan| Hayashi, Nobuyuki| Tsuboi, Sadao|
Abstract This paper describes a novel synthesis of trienes by treatment of trans-2-alkenyl triphenylphosphonium bromides with BuLi in THF solution. Compounds, 5,7,9-tetradecatriene, 1,6-diphenyl-1,3,5-hexatriene, and 2,6,11,16-tetramethyl-2,6,8,10,14-hexadecapentaene were prepared in the yields of 40%, 9%, and 46%, respectively. Cross-coupling of trans-2-heptenyltriphenylphosphonium bromide and trans-3-phenyl-2-propenyltriphenylphosphonium bromide gave a mixture of 5,7,9-tetradecatriene (10.6%), 1,6-diphenyl-1,3,5-hexatriene (0.5%), and 1-phenyl-1,3,5-decatriene (9.4%).
Publication Title 岡山大学環境理工学部研究報告
Published Date 2000-02-29
Volume volume5
Issue issue1
Start Page 153
End Page 158
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313618
JaLCDOI 10.18926/fest/11523
FullText URL 007_039_044.pdf
Author Watanabe, Masaji|
Abstract We present some results of a finite element analysis for an unsteady flow in Kojima Lake. We also present an experimental result. The global positioning system was utilized in the experiment in order to record the temporal and the spatial data of a float traveling with the driving force of the fluid resistance. The spatial and temporal data were recorded to examine their correspondence with analytical results.
Keywords lake flow numerical simulation finite element method global positioning system
Publication Title 岡山大学環境理工学部研究報告
Published Date 2002-03-22
Volume volume7
Issue issue1
Start Page 39
End Page 44
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313386
JaLCDOI 10.18926/fest/11559
FullText URL 005_031_034.pdf
Author Watanabe, Masaji|
Abstract We study unsteady flow that models lake flow in Kojima Lake. We assume that a lake is connected to another area with gates, and that those gates are opened when the water level outside the gates is lower than the water level of the lake. We study unsteady flow due to the opening of the gates. We analyze the problem with the finite element method, and take detailed structures of the gates into account.
Keywords unsteady flow lake flow finite element method
Publication Title 岡山大学環境理工学部研究報告
Published Date 2000-02-29
Volume volume5
Issue issue1
Start Page 31
End Page 34
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313848
JaLCDOI 10.18926/fest/11453
FullText URL 009_037_044.pdf
Author Sung Jimin| Tanaka, Yutaka|
Abstract There have been proposed so far many methods of statistical diagnostics in Cox regression for checking the goodness of the estimated model or checking the adequacy of the data. The former type contains the checking of the overall goodness of fit, the validity of the assumption of proportional hazards and the proper functional forms of the effects of covariates. While the latter type contains the checking whether there exist singly and/or jointly influential observations in the data set. In the present paper we study numerically the performances of various methods of diagnostics including our method of influence analysis for multiple-case diagnostics (Sung and Tanaka, 2003) by analyzing a real data set of lung cancer patients.
Keywords Cox regression Influence function Local influence Influential Subsets Cox-Snell residuals Martingale residual Deviance residual
Publication Title 岡山大学環境理工学部研究報告
Published Date 2004-02-27
Volume volume9
Issue issue1
Start Page 37
End Page 44
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313595
JaLCDOI 10.18926/19660
FullText URL Mem_Fac_Eng_OU_33_2_25.pdf
Author Song Baoyin| Inaba, Hideo| Horibe, Akihiko|
Abstract A set mathematical models was developed for predicting the performance of an open-type flat-plate solar collector, and solved numerically through an implicit difference method. The effects of various parameters on the absorption of solar energy for the collector were investigated. The results showed that the solar energy absorptance of the open-type flat-plate collector was relatively high especially for the region where the weather was humid and hot, and there were an optimum length and an optimum tilt angle for the absorbing plate on which the collector could obtain the highest solar energy absorptance. It was found that the latent heat flux of water evaporation could be 5 to 15 times larger than the sensible heat flux. The effects of the magnitude of the solar incident flux, the atmospheric humidity, the atmospheric temperature, the absorbing plate tilt angle, and water film thickness on the temperature rising of the water film were clarified in numerical quantities. The increase of the solar incident flux, the atmospheric humidity or the atmospheric temperature also resulted in a rise in the energy absorptance of the collector.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1999-04-27
Volume volume33
Issue issue2
Start Page 25
End Page 37
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002308992
Author Moritsugu, Masumi|
Published Date 1985
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Biologie, Okayama Universität
Volume volume19
Issue issue1
Content Type Departmental Bulletin Paper
Author Uchida, Kei| Suzuki, Yukio|
Published Date 1986
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Biologie, Okayama Universität
Volume volume19
Issue issue2
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15723
FullText URL Mem_Sch_Eng_OU_13_195.pdf
Author Sano, Hiroya| Koga, Ryuji| Tanada Yoshihiro| Kosaka, Megumi|
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)[Nep√(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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1979-03-05
Volume volume13
Start Page 195
End Page 207
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307857
JaLCDOI 10.18926/15557
FullText URL Mem_Sch_Eng_OU_1_120.pdf
Author Wada Tsutomu| Sawaragi Yosikazu| Yonezawa Yoo|
Abstract We attempt to apply the feedback compensation technics of on-off controller to the pneumatic systems. In this paper, we describe the structure and the action of a new developed pneumatic on-off controller with feedback compensation, and the principle of the special pilot valve which is used in the controller as the on-off element. Next, it is shown analytically and experimentally that the dynamic characteristics of the controller are nearly equal to those of the continuous one which has an infinite proportional gain instead of the on-off element, if the time average of its discontinuous output is treated as the output of the controller.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 120
End Page 129
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307543
Author Itano, Arao|
Published Date 1928-10-04
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Forschungen
Volume volume4
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15511
FullText URL Mem_Fac_Eng_OU_25_2_55.pdf
Author Ohkura Akira| Kameyama, Yoshimasa| Sayama, Hayatoshi| Suzuki, Kazuhiko| Fukumoto Shuichi|
Abstract AHP can handle decision-making problems involving several criteria when some of these are difficult or impossible to compare other than numerically. When a small group of decision makers settle the multi-criteria problem by AHP, the members of group could not often reach an agreement with hierarchic structure involving objectives, criteria, sub-criteria and alternatives because they have different positions, interests, and opinions. Further, the members have different importances for criteria and sub-criteria, and have dissimilar preferences for alternatives. In this article, we reveal the troubleness of AHP in case of being used by a small group of decision makers. Moreover, we proposed a procedure of AHP which the members of group could easily agree with the structure of problem and the weights of criteria etc.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1991-03-28
Volume volume25
Issue issue2
Start Page 55
End Page 67
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307741
Author Itano, Arao|
Published Date 1933-08-20
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Forschungen
Volume volume6
Issue issue1
Content Type Departmental Bulletin Paper