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Todaymanyeconomists, engineers and mathematicians are familiar with
linear programming and are able to apply it. This is owing to the
following facts: during the last 25 years efficient methods have
been developed; at the same time sufficient computer capacity
became available; finally, in many different fields, linear
programs have turned out to be appropriate models for solving
practical problems. However, to apply the theory and the methods of
linear programming, it is required that the data determining a
linear program be fixed known numbers. This condition is not
fulfilled in many practical situations, e. g. when the data are
demands, technological coefficients, available capacities, cost
rates and so on. It may happen that such data are random variables.
In this case, it seems to be common practice to replace these
random variables by their mean values and solve the resulting
linear program. By 1960 various authors had already recog nized
that this approach is unsound: between 1955 and 1960 there were
such papers as "Linear Programming under Uncertainty," "Stochastic
Linear Pro gramming with Applications to Agricultural Economics,"
"Chance Constrained Programming," "Inequalities for Stochastic
Linear Programming Problems" and "An Approach to Linear Programming
under Uncertainty.""
The first Joint Meeting of the Austrian and Swiss Operations
Research Societies was held at the University of Technology in
Vienna, Austria, from 22-24 September 1980. A selection of the
papers then presented are published in this volume. The papers
included provide a picture of Operations Research as a discipline
comprehending various methods and models. The volume is divided
into two parts. The first part contains papers on mathematical
programming and optimal control theory. Moreover, two papers on
decision and game theory are included as well as two on
biomathematical to~ics. Being more heterogeneous, the second part,
on stochastic models, includes such topics as queueing theory,
econometrics and time series analysis. As a special feature of the
symposium, a series of applications of OR models in energy planning
were discussed, e.g., load and demand forecasting, power
distribution and extension planning, reliability and work-safety,
etc. These papers have been incorporated into parts one and two
according to the models used. GUSTAV FEICHTINGER PETER !C ALL
Institut fUr Okonometrie und Institut fUr Operations Research und
Operations Research mathematische Methoden der Wirtschafts-
Technische UniversitHt wissenschaften Wien UniversitHt ZUrich
November 198 I ix Gustav Feichtinger and Peter Kall (eds.),
Operations Research in Progress, ix..
The first Joint Meeting of the Austrian and Swiss Operations
Research Societies was held at the University of Technology in
Vienna, Austria, from 22-24 September 1980. A selection of the
papers then presented are published in this volume. The papers
included provide a picture of Operations Research as a discipline
comprehending various methods and models. The volume is divided
into two parts. The first part contains papers on mathematical
programming and optimal control theory. Moreover, two papers on
decision and game theory are included as well as two on
biomathematical to~ics. Being more heterogeneous, the second part,
on stochastic models, includes such topics as queueing theory,
econometrics and time series analysis. As a special feature of the
symposium, a series of applications of OR models in energy planning
were discussed, e.g., load and demand forecasting, power
distribution and extension planning, reliability and work-safety,
etc. These papers have been incorporated into parts one and two
according to the models used. GUSTAV FEICHTINGER PETER !C ALL
Institut fUr Okonometrie und Institut fUr Operations Research und
Operations Research mathematische Methoden der Wirtschafts-
Technische UniversitHt wissenschaften Wien UniversitHt ZUrich
November 198 I ix Gustav Feichtinger and Peter Kall (eds.),
Operations Research in Progress, ix..
This vo1ume contains most of the papers (two of the~ as extended
abstracts) presented at a meeting on stochastic programming, held
at Oberwolfach, January 28 - February 3, 1979. A1though the number
of participants had to be small for technical rea- sons, the area
covered by the 1ectures during the meeting was rather broad. lt
contains fundamental theoretical problems - e.g. continuity in
parametric programming, optima1ity conditions and decision rules
for stochastic programming problems and convexity statements also
nee- ded for chance constrained problems - as well as very
important prac- tical problems, as computational methods for
various models and appli- cations to water storage problems,
dynamic inventory control, asphalt mixing, portfolio selection, and
so on. Without any doubt there are still many theoretical and
computational problems of this field unso1ved, and some of them can
be discovered in this volume. On the other hand, the papers
presented here also show, that during the last two decades
knowledge - theoretical and computa- tional - on stochastic
programming, and practical experience with it, have been developped
so far, that neglecting apriori the stochastic nature of parameters
for almost every price - very often done in mo- delling a practical
decision situation as deterministic optimization problem - can no
longer be justified.
Die 6. Jahrestagung der Deutschen Gesellschaft fUr Operations
Research fand vom 21. bis 23. September 1977 in den Raumen der
Christian-Albrechts-Universitat in Kiel statt. Mit etwa 300
Teilnehmern und Referenten aus Deutschland und mehreren
europaischen Landern wurde das groBe Interesse der Fachvertreter
aus Wissenschaft, Wirtschaft und offentlicher Verwaltung an den
DGOR- Jahrestagungen dokumentiert. Die zunehmende Anzahl von
Beitragen zum Tagungsprogramm laBt erken- nen. daB Operations
Research insbesondere fUr die Anwendungen in der Praxis starkere
Beachtung findet. Diese Entwicklung findet ihren Niederschlag in
zahlreichen Arbeiten dieses Tagungsbandes, wobei vor allem das
heute erreichte breite Anwendungsspektrum von OR-Verfahren sichtbar
wird. Gerade die Kombination des Operations Research mit den
Moglichkeiten der EDV eroffnet hier neue Wege. Die VerfUgbarkeit
kostengUnstiger und leistungsstarker Computersysteme wird kUnftig
dazu beitragen, dem Operations Research neue Impulse zu vermitteln.
Besonderer Dank fUr die erfolgreiche Gestaltung der Tagung gilt
Herrn Prof. Dr. Reinhart Schmidt, Universitat Kiel, und seinen Mit-
arbeitern, denen die Tagungsvorbereitung und ortliche Tagungsorga-
nisation Ubertragen war. Unser Dank gilt auch den Referenten und
dem Verlag fUr ihre bereitwilligeKooperation bei der Drucklegung
dieses Tagungsbandes.
Der behandelte Stoff gliedert sich in funf Teile: Mechanische
Messmethoden - Elektromechanische Wandler und Messung von
Schwankungsgrossen - Optische Messmethoden - Methoden der
Stromungssichtbarmachung - Versuchsanlagen fur
Modelluntersuchungen"
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