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711.
712.
We propose efficient implementation of a fuzzy associative memory system based on a fuzzy-sets decomposition technique. The technique involves decomposing the input fuzzy sets of a fuzzy associative memory into orthogonal subsets so multiple fuzzy rules can be superimposed without loss of information. This technique can significantly reduce the optical hardware and computation needs of fuzzy associative memory systems. 相似文献
713.
714.
715.
Mohamad Faisal Abdul Karim Ahmad Izani Md Ismail Hoe Bee Ching 《Chaos, solitons, and fractals》2009,41(5):2847-2853
Hantaviruses are a group of viruses which have been identified as being responsible for the outbreak of diseases such as the hantavirus pulmonary syndrome. In an effort to understand the characteristics and dynamics of hantavirus infection, mathematical models based on differential equations have been developed and widely studied. However, such models neglect the local characteristics of the spreading process and do not include variable susceptibility of individuals. In this paper, we develop an alternative approach based on cellular automata to analyze and study the spatiotemporal patterns of hantavirus infection. 相似文献
716.
Karim Johannes Becher 《Mathematische Zeitschrift》2008,258(3):691-709
This article investigates the structure of quadratic forms and of division algebras of exponent two over fields of characteristic
different from two with the property that the third power of the fundamental ideal in the associated Witt ring is torsion
free.
相似文献
717.
We study sums of squares, quadratic forms, and related field invariants in a quadratic extension of the rational function
field in one variable over a hereditarily pythagorean base field. 相似文献
718.
In this study, we investigated the way of predicting two critical concentrations of sodium carboxymethyl cellulose (CMC) solutions
using simple experimental procedures with a rotational rheometer. It was found that, above a critical shear rate, all CMC
solutions (0.2 to 7 wt.%) exhibit shear-thinning behavior and the flow curves could be described by the Cross model. A first
critical CMC concentration c*, transition to semidilute network solution, was determined using the following methods (1) study of the flow curve shapes, (2) Cross model parameters, (3) plot of the specific viscosity vs the overlap parameter, and (4) empirical structure–properties relationships. Furthermore, both creep and frequency-sweep measurements showed that the solutions
behaved as viscoelastic materials above a second critical CMC concentration c** (transition to concentrated solution). The characterization of CMC solutions was completed with a time-dependent viscosity
study that showed that the CMC solutions exhibited strong thixotropic behavior, especially at the highest CMC concentrations. 相似文献
719.
Ashfaque H. Bokhari Munawar Karim Dina N. Al-Sheikh F. D. Zaman 《International Journal of Theoretical Physics》2008,47(10):2672-2678
In this note we consider a general three-dimensional circularly symmetric static metric and investigate possible Killing symmetries it possesses.We then summarize
the work by addressing Einstein equations and briefly discuss their implications on the energy momentum content of some of
the metrics that arise in the process. 相似文献
720.