JaLCDOI 10.18926/15713
FullText URL Mem_Sch_Eng_OU_11_2_51.pdf
Author Inouye Hiroshi|
Abstract In this paper some computational methods of traffic assignment are proposed. At first solutions of traffic assignment by the equal travel times principle used nonlinear programmings are showed. They are a method to approximate by a quadratic programming, a method to use the SUMT transformation, a method to apply Rosen's gradient projection method and a method to apply the conjugate gradient projection method. Through a computational example the efficiency of them are compared. To decide route flows uniquely in traffic assignment by the equal travel times principle, a method requesting route flows such that the joint probability is a maximum under supposed a priori probabilities is proposed. In case of a traffic assignment in a large scale road network, it is significant to improve the efficiency of route searches. For this purpose a technique of minimum time route search by division of a network is proposed.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1977-01-25
Volume volume11
Issue issue2
Start Page 51
End Page 71
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307829
JaLCDOI 10.18926/15711
FullText URL Mem_Sch_Eng_OU_11_2_37.pdf
Author Kawara Osami|
Abstract In this paper, we compare ozone with chlorine regarding following respects; (1)Disinfection efficiency (2)Oxidation power (3)Effects of secondary effluents treated by ozone or chlorine on aerobic microorganisms. Both ozone and chlorine are powerfull oxidizing agents. However,those are greatly different from each other in effects of treatment. Ozone is superior to chlorine in oxidation of organics, perfection of disinfection and effects on aerobic microorganisms. On the other hand, chlorine is superior in disinfection of Coliform group bacteria. Based on these results,it may be concluded that chlorination will be effective in disinfection of effluents which do not contain so much contaminants. However in case of rather highly cotaminated effluents, ozonation will be suitable.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1977-01-25
Volume volume11
Issue issue2
Start Page 37
End Page 49
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307819
JaLCDOI 10.18926/15710
FullText URL Mem_Sch_Eng_OU_11_2_27.pdf
Author Nago Hiroshi|
Abstract In this paper the influence of a vertical lip upon the contraction coefficients of underflow gates is discussed. The coefficients of inclined gates with a vertical lip are investigated theoretically by using the method of conformal mapping. Solutions are obtained numerically for several values of the inclination of gate bottom. Theoretical solutions show that;as the length of a lip increases, the coefficient rapidly decreases from the value for the inclined gate, and when the length becomes of the order of a gate openning,it takes a value to be nearly equal to that for a vertical gate. These theoretical results are verified by experiments.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1977-01-25
Volume volume11
Issue issue2
Start Page 27
End Page 36
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307779