معرفی دانشمندان

Lotfali A. Zadeh in 2004

Baku, Azerbaijan SSR, USSR

fuzzy set theory, and fuzzy logic

February 4, 1921) is a mathematician and

computer scientist, and a professor of computer

science at the University of California,

Berkeley.

1 Biography

2 Work

2.1 Fuzzy sets and systems

2.2 Other contributions

3 Publications

4 References

5 External links

He was born in Baku, of an Azeri father on

assignment as a journalist from Iran, and a

Russian mother who was a pediatrician.[1]

(http://www.bookrags.com/biography/lotfiasker-

zadeh-wcs/) However at the age of ten,

when Joseph Stalin introduced collectivization

of farms throughout the Soviet Union, the

Zadeh family moved to Iran, his father's

homeland. Zadeh grew up in Iran, studied at

Alborz High School. After high school, he sat for the national university exams and placed second in the

entire country. In 1942, he was graduated from the University of Tehran in electrical engineering (Fanni), and

moved to the United States in 1944. He received an MS degree in electrical engineering from MIT in 1946,

and a PhD in electrical engineering from Columbia University in 1949.

He taught for ten years at Columbia University and was promoted to full professor in 1957. He has taught at

the University of California, Berkeley since 1959. He published his seminal work on fuzzy sets in 1965 in

which he detailed the mathematics of fuzzy set theory. In 1973 he proposed his theory of fuzzy logic.

Zadeh is noted to be "quick to shrug off nationalism, insisting there are much deeper issues in life", where he

himself is quoted stating: "The question really isn't whether I'm American, Russian, Iranian, Azerbaijani, or

04/12/2009 Lotfi Asker Zadeh - Wikipedia, the free …

http://en.wikipedia.org/wiki/Lotfi_Aske… 1/5

anything else. I've been shaped by all these people and cultures and I feel quite comfortable among all of

Zadeh also notes in the same interview from which the above quote is taken: "Obstinacy and tenacity. Not

being afraid to get embroiled in controversy. That's very much a Turkish tradition. That's part of my

character, too. I can be very stubborn. That's probably been beneficial for the development of Fuzzy

Zadeh is married to Fay Zadeh and has two children, Stella Zadeh and Norman Zadeh.

Awards

In 1994 he was inducted as a Fellow of the Association for Computing Machinery. He was awarded the

IEEE Medal of Honor in 1995 "For pioneering development of fuzzy logic and its many diverse applications."

Zadeh has a long list of achievements, but since 2003, Zadeh has received the following awards.

In 1993 Azerbaijan bestowed him an honorary Professorship from the Azerbaijan State Oil Academy.

Outstanding Contribution Award, Web Intelligence Consortium (WIC), Halifax, Canada, 2003.

Wall of Fame, Heinz Nixdorf MuseumsForum (HNF), Paderborn, Germany, 2004.

Civitate Honoris Causa, Budapest Tech Polytechnical Institution, Budapest, Hungary; Sept. 4, 2004.

Doctor Honoris Causa, Muroran Institute of Technology, Muroran, Japan; Oct. 29, 2004.

Doctor Honoris Causa, Hong Kong Baptist University, Hong Kong, China; Nov. 9, 2004.

V. Kaufmann Prize and Gold Medal, International Association for Fuzzy-Set Management and

Economy (SIGEF), Barcelona, Spain, Nov. 15, 2004.

Foreign member of the Polish Academy of Sciences, 2005.

Nicolaus Copernicus Medal of the Polish Academy of Sciences, 2005.

J. Keith Brimacombe IPMM Award in recognition of his development of fuzzy set theory and fuzzy

logic, 2005.

Doctor Honoris Causa, Universidad Politécnica de Madrid, Madrid, Spain; Jan. 29, 2007.

Richard E. Bellman Control Heritage Award

Doctor Honoris Causa, Ryerson University, Toronto , Ontario, Canada; June 10th 2008.

Zadeh's most recent recognition comes from The Franklin Institute in Philadelphia. Lotfi Zadeh receives the

2009 Benjamin Franklin Medal in Electrical Engineering for inventing and developing the field of “fuzzy

logic,” in which a system applies a quantitative assessment to inherently ambiguous ideas, thus providing a

new paradigm to improve artificial intelligence and automated control systems.

Because of the importance of the relaxation of Aristotelian logic, which opens up applicability of rational

methods to the majority of practical situations without dichotomous truth values, Zadeh is one of the most

referenced authors in the fields of applied mathematics and computer science, but – as noted below – his

contributions are not limited to fuzzy sets and systems.

Aristotle introduced the laws of thought, which consisted of three fundamental laws:

04/12/2009 Lotfi Asker Zadeh - Wikipedia, the free …

http://en.wikipedia.org/wiki/Lotfi_Aske… 2/5

Principle of identity

Law of the excluded middle

Law of contradiction

The law of the excluded middle states that for all propositions p, either p or ~p must be true, there being no

middle true proposition between them. This should not be confused with the principle of bivalence, which

states that either p must be true or false.

described the 3-valued logic, with the third value beingPossible. Zadeh, in his theory of fuzzy logic,

proposed the making of the membership function operate over the range of real numbers in the interval [0,1].

He proposed new operations for the calculus of logic and showed that fuzzy logic was a generalisation of

classical logic.

Lotfi Zadeh is also credited, along with John R. Ragazzini, in 1952, with having pioneered the development

of the z-transform method in discrete time signal processing and analysis. These methods are now standard in

digital signal processing, digital control, and other discrete-time systems used in industry and research.

Zadeh's latest work includes computing with words and perceptions. His recent papers include From Search

Engines to Question-Answering Systems—The Role of Fuzzy Logic (http://wwwbisc.

cs.berkeley.edu/zadeh/papers/From%20Search%20Engines%20to%20Question-

Answering%20Systems...2006.pdf) , Progress in Informatics, No. 1, 1-3, 2005; and Toward a Generalized

Theory of Uncertainty (GTU)—An Outline (http://wwwbisc.

cs.berkeley.edu/BISCSE2005/Zadeh2005.pdf) , Information Sciences, Elsevier, Vol. 172, 1-40, 2005.

Zadeh wrote several articles. A selection:

1965. Fuzzy sets. Information and Control. 1965; 8: 338–353.

1965. Fuzzy sets and systems. In: Fox J, editor. System Theory. Brooklyn, NY: Polytechnic Press,

1965: 29–39.

1972. A fuzzy-set-theoretical interpretation of linguistic hedges. Journal of Cybernetics 1972; 2: 4–34.

1973.Outline of a new approach to the analysis of complex systems and decision processes. IEEE

Trans. Systems, Man and Cybernetics, 1973; 3: 28–44.

1974. Fuzzy logic and its application to approximate reasoning. In:Information Processing 74, Proc.

IFIP Congr. 1974 (3), pp. 591–594.

1975. Fuzzy logic and approximate reasoning. Synthese, 1975; 30: 407–428.

1975. Calculus of fuzzy restrictions. In: Zadeh LA, Fu KS, Tanaka K, Shimura M, editors. Fuzzy Sets

and their Applications to Cognitive and Decision Processes. New York: Academic Press, 1975: 1–

39.

1975. The concept of a linguistic variable and its application to approximate reasoning, I-III,

Information Sciences 8 (1975) 199–251, 301–357; 9 (1976) 43–80.

About Lotfi Asker Zadeh

04/12/2009 Lotfi Asker Zadeh - Wikipedia, the free …

http://en.wikipedia.org/wiki/Lotfi_Aske… 3/5

This page was last modified on 9 April 2009, at 13:21 (UTC).

details.)

Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a U.S. registered 501(c)(3)

Fuzzy Sets and Systems. The main journal of the field which contains many contributions by its

founder.

Aristotle :Metaphysics, Chapter 7.

Zadeh :From computing with numbers to computing with words — from manipulation of

measurements to manipulation of perceptions in International Journal of Applied Math and Computer

Science, pp. 307-324, vol. 12, no. 3, 2002.

Fay Zadeh. "My Life and Travels with the Father of Fuzzy Logic". 1998, TSI Press, Albuquerque,

NM.

Berkeley Commencement Speech: "Commercialism and Human Values: When You Can't Stop for

Lunch" in Azerbaijan International - AZER.com

(http://www.azer.com/aiweb/categories/magazine/61_folder/61_articles/61_zadeh.html)

Lotfi Zadeh Reflects Upon his Childhood, Azerbaijan International, Winter 1999.

(http://www.azer.com/aiweb/categories/magazine/74_folder/74.articles/74_zadeh.html)

Academic profile (http://www.cs.berkeley.edu/~zadeh/) – Berkeley, University of California

IEEE: Zadeh (http://www.ieee.org/web/aboutus/history_center/biography/zadeh.html)

Honorary Chair and Keynote Speaker, ICCCC 2008, A conference dedicated to the Centenary of

John Bardeen (http://www.iccc.univagora.ro/)

For Zadeh's PhD students see

Lotfali A. Zadeh (http://www.genealogy.math.ndsu.nodak.edu/html/id.phtml?id=32837) on the

Mathematics Genealogy Project page.

1965 seminal work on Fuzzy Sets (http://www-bisc.cs.berkeley.edu/Zadeh-1965.pdf)

Retrieved from "http://en.wikipedia.org/wiki/Lotfi_Asker_Zadeh"

Categories: 1921 births | Artificial intelligence researchers | Alborz High School alumni | Control theorists |

Fellows of the Association for Computing Machinery | Guggenheim Fellows | IEEE Medal of Honor

recipients | Iranian Americans | Iranian scientists | Journal editors | Living people | People from Ardabil |

People from Baku | Richard E. Bellman Control Heritage Award recipients | Systems scientists | University of

California, Berkeley faculty | University of Tehran alumni | Iranian electrical engineers

Hidden categories: Articles containing Azerbaijani language text | Articles containing Persian language text

04/12/2009 Lotfi Asker Zadeh - Wikipedia, the free …

http://en.wikipedia.org/wiki/Lotfi_Aske… 4/5

Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a U.S. registered 501(c)(3)

tax-deductible nonprofit charity.

04/12/2009 Lotfi Asker Zadeh - Wikipedia, the free …

http://en.wikipedia.org/wiki/Lotfi_Aske… 5/5