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SUMMARY:Applications of Optimal Control Theory in Civil and Environmental 
 Engineering
DTSTART:20120419T121500
DTEND:20120419T131500
DTSTAMP:20260428T060834Z
UID:32613d44744e152fc6b05f7497ab801fa7f00dde74da32ff6d5ad743
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Ilya Ioslovich\nOn optimal irrigation scheduling\n\nOpti
 mal irrigation scheduling based on a dynamical model is analyzed\, and glo
 bal optimality has been proven with the use of sufficient conditions. The 
 rather simple dynamic model has been used here. The model has two state va
 riables: plant biomass and soil moisture. The optimal trajectory\, i.e. th
 e optimal irrigation scheduling\, generally contains three periods: (i) ma
 ximal irrigation up to the optimal level of soil moisture\, (ii) intermedi
 ate irrigation that maintains soil moisture at the optimal level which is 
 a singular arc and (iii) no irrigation until the end of the growth season.
  This approach uses Krotov’s sufficient conditions of optimality\, Kroto
 v’s global bounds method\, and Hamilton-Jacobi-Bellman formalism.\n\n\nT
 ime-Optimal Traffic Control Synthesis for a Signalized Isolated Intersecti
 on\n\nThe minimum time optimal control problem for a signalized intersecti
 on is defined as finding the green split that dissolves all initial non-ze
 ro queue lengths in minimum time. Here\, the optimal minimum time control 
 for an isolated intersection is found in explicit state feedback form\, wh
 ere the state is defined as the queue lengths\, by the use of a clever mod
 ification of D. Gazis’s continuous differential model\, and the Pontryag
 in Maximum Principle. The closed form feedback solution is presented for a
 ll types of constraints on the maximal green split values\, and on the que
 ue lengths\, i.e. with constrained control and state variables. In general
 \, the minimum time optimal solutions are non-unique. It is also demonstra
 ted that the known contribution by D. Gazis (1964) alleged to solve the mi
 nimal “total delay” problem is in fact a minimal time solution in a pa
 rticular region of the state space.\n\nBio: Prof. Ilya Ioslovich was born 
 in Moscow\, Russia\, in 1937. He received the M.Sc. degree in mechanics fr
 om Moscow State University\, Moscow\, in 1960\, and the Ph.D. degree in ph
 ysics and mathematics from Moscow Institute of Physics and Technology (Phy
 s-Tech)\, Moscow\, in 1967. He held positions of head of lab and head of d
 ivision in different research Institutions in Moscow. Since 1991\, he has 
 been with the Faculty of Agricultural Engineering\, Technion\, Haifa\, Isr
 ael. Since 2002\, he was Full Professor in the Faculty of Civil and Enviro
 nmental Engineering\, Technion. Since 2012 he is scientific consultant at 
 Technion Research and Development Foundation Ltd. His current research int
 erests include optimization of agricultural\, environmental and transporta
 tion systems\, space research\, optimal control\, identification\, and mod
 eling. Prof. Ioslovich is recipient of two silver medals for industrial ac
 hievements from the Soviet All-Union Exhibition in 1976 and 1983.
LOCATION:GC C330 http://plan.epfl.ch/?room=GC%20C3%2030
STATUS:CONFIRMED
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