106 research outputs found
Computer applications in steel industry
An overview of the current status of computer applicat-ions in the steel industry has been presented from the point of view of process automation and control. Specific areas covered range from sintering to rolling - including energy and transport management. It has been concluded
that development of more intelligent man-machine interface
for computer aided analysis, simulation and implementation of control system coupled with advances in software engi-neering, parallel processing, high performance graphics and artificial intelligence based systems have led to cons-iderable advancement in all areas as evidenced by signi-ficant improvement in both the plant productivity and pro-duct quality, the world over. Efforts being made in India in general and at R&D Centre of SAIL in particular have been highlighted. In this context, generation of our own technology and a rational and intelligent selection and adoption of various technical advances has been emphasised
Index to NASA Tech Briefs, 1972
Abstracts of 1972 NASA Tech Briefs are presented. Four indexes are included: subject, personal author, originating center, and Tech Brief number
Aeronautical Engineering: A special bibliography with indexes, Supplement 35, September 1973
This special bibliography lists 614 reports, articles, and other documents introduced into the NASA scientific and technical information system in August 1973
NASA Thesaurus. Volume 2: Access vocabulary
The NASA Thesaurus -- Volume 2, Access Vocabulary -- contains an alphabetical listing of all Thesaurus terms (postable and nonpostable) and permutations of all multiword and pseudo-multiword terms. Also included are Other Words (non-Thesaurus terms) consisting of abbreviations, chemical symbols, etc. The permutations and Other Words provide 'access' to the appropriate postable entries in the Thesaurus
NASA thesaurus. Volume 2: Access vocabulary
The access vocabulary, which is essentially a permuted index, provides access to any word or number in authorized postable and nonpostable terms. Additional entries include postable and nonpostable terms, other word entries and pseudo-multiword terms that are permutations of words that contain words within words. The access vocabulary contains almost 42,000 entries that give increased access to the hierarchies in Volume 1 - Hierarchical Listing
On the analysis and design of genetic fuzzy controllers : An application to automatic generation control of large interconnected power systems using genetic fuzzy rule based systems.
Frequency Control of large interconnected power systems is governed by means
of Automatic Generation Control (AGC), which regulates the system frequency
and tie line power interchange at its nominal parameter set points. Conventional
approaches to AGC controller design is centered around the Proportional, Integral
and Derivative (PID) controller structures, which have found widespread
application within industry.
However, the dynamic changes experienced throughout the life cycle of power
systems have many contributing factors, in part attributed to unknown knowledge
of system behavior, neglected process dynamics and a limited knowledge of
system interactions, which makes modeling for AGC systems particularly trying
for conventional AGC controller design approaches.
Therefore, in this study, Genetic - Fuzzy controllers (GA - Fuzzy) are applied as
plausible candidates for Automatic Generation Controller design and application.
In GA - Fuzzy controllers, genetic algorithms which are based on the foundation
of evolutionary heuristics are used as a global search method for FLC design.
This is particularly motivated by the fact that Fuzzy controllers, especially where
there are large data sets, unknown process knowledge and insu cient expert data
available, FLC controller design proves to be a daunting task.
Therefore, this thesis explores the automatic design of FLC controllers through
evolutionary heuristics and applies the designed controller to the AGC problem
of large interconnected power systems. The design methodology followed is to
understand power system interactions through power plant modeling and the
simulation power plant models for the basis for AGC controller design.
It is shown in this study that the performance of the GA - Fuzzy controller
have favourable characteristics in terms of robust performance, robustness properties
and compares favorably with conventional AGC controller techniques. The
analysis of the GA - Fuzzy controller shows that problem formulation and chromosome
encoding of the problem search space forms an important prerequisite
for controller design by evolutionary methods.
Therefore the study concludes by stating that GA - Fuzzy controllers are plausible
for application within the power industry because of its desirable attributes
and that future work would include extending this research into areas of renewable
energy for study and application
NASA thesaurus. Volume 2: Access vocabulary
The Access Vocabulary, which is essentially a permuted index, provides access to any word or number in authorized postable and nonpostable terms. Additional entries include postable and nonpostable terms, other word entries, and pseudo-multiword terms that are permutations of words that contain words within words. The Access Vocabulary contains 40,738 entries that give increased access to the hierarchies in Volume 1 - Hierarchical Listing
Cumulative index to NASA Tech Briefs, 1970-1975
Tech briefs of technology derived from the research and development activities of the National Aeronautics and Space Administration are presented. Abstracts and indexes of subject, personal author, originating center, and tech brief number for the 1970-1975 tech briefs are presented
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