2018-09-18T23:33:11Z
http://ijfs.usb.ac.ir/?_action=export&rf=summon&issue=90
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
Cover Vol.3 No.2, October 2006
2006
10
29
0
http://ijfs.usb.ac.ir/article_2914_aa82ef8226d37ef7b48868b10443ad5d.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
Fuzzy sets form A meta-system-theoretic point of view
Amir
Daneshgar
Amir
Hashemi
L-fuzzu sets
Enriched category
I/O system theory
Morphological filtering
Translation invariant system
2006
10
20
1
19
http://ijfs.usb.ac.ir/article_451_685c7ee8c6f45c37d1aaa5acd967dfda.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
FUZZY OBSERVER DESIGN WITH n-SHIFT MULTIPLE KEY FOR CRYPTOGRAPHY BASED ON 3D HYPERCHAOTIC OSCILLATOR
V.
NATARAJAN
P.
KANAGASABAPATHY
N.
SELVAGANESAN
P.
NATARAJAN
A fuzzy observer based scheme for synchronizing two hyperchaoticoscillators via a scalar transmitted signal for cryptographic application isproposed. The Takagi-Sugeno fuzzy model exactly represents chaotic systems.Based on the general fuzzy model, the fuzzy observer of a chaotic system isdesigned on the basis of the n-shift multiple state based key encryption algorithm.The scalar transmitted signal is designed in such a way that the hyperchaoticcarrier masks the encrypted signal, which in turn hides the message signal.Simulation results show that the proposed scheme gives a better performanceeven when a small additive stochastic noise is present in the channel.
2006
10
20
21
32
http://ijfs.usb.ac.ir/article_452_424075805b1976f552dabf7c5c35d372.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
DIRECT ADAPTIVE FUZZY PI SLIDING MODE CONTROL OF SYSTEMS
WITH UNKNOWN BUT BOUNDED DISTURBANCES
MOHAMMAD-REZA
AKBARZADEH-TOTONCHI
REZA
SHAHNAZI
An asymptotically stable direct adaptive fuzzy PI sliding modecontroller is proposed for a class of nonlinear uncertain systems. In contrast toother existing approaches of handling disturbances, the proposed approachdoes not require this bound to be known, only requiring that it exists.Moreover, a PI control structure is used to attenuate chattering. The approachis applied to stabilize an open-loop unstable nonlinear system as well asthe Duffing forced-oscillation chaotic nonlinear system amid significantdisturbances. Analysis of simulations reveals the effectiveness of the proposedmethod in terms of a significant reduction in chattering while maintainingasymptotic convergence.
Nonlinear control
Fuzzy logic
Sliding mode control
Uncertainty
External
disturbances
Duffing forced-oscillation
Adaptive PI control
2006
10
20
33
51
http://ijfs.usb.ac.ir/article_453_298e3d12a051cfd3b73c004c5792a918.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
SEMI $theta$-COMPACTNESS IN INTUITIONISTIC FUZZY TOPOLOGICAL SPACES
I. M.
Hanafy
A. M.
Abd El-Aziz
T. M.
Salman
The purpose of this paper is to construct the concept of semi$theta$-compactness in intuitionistic fuzzy topological spaces. We give some characterizationsof semi $theta$-compactness and locally semi -compactness. Also, wecompare these concepts with some other types of compactness in intuitionisticfuzzy topological spaces.
2006
10
21
53
62
http://ijfs.usb.ac.ir/article_462_d51233b4f1c9889edb5f6eaf56e94c63.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
INTERVAL-VALUED FUZZY B-ALGEBRAS
Arsham
Borumand Saeid
In this note the notion of interval-valued fuzzy B-algebras (briefly,i-v fuzzy B-algebras), the level and strong level B-subalgebra is introduced.Then we state and prove some theorems which determine the relationshipbetween these notions and B-subalgebras. The images and inverse images ofi-v fuzzy B-subalgebras are defined, and how the homomorphic images andinverse images of i-v fuzzy B-subalgebra becomes i-v fuzzy B-algebras arestudied.
2006
10
21
63
73
http://ijfs.usb.ac.ir/article_467_8d60975e2e2d849868fe833f3a6244d5.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
FUZZY SUBGROUPS AND CERTAIN EQUIVALENCE RELATIONS
APARNA
JAIN
In this paper, we study an equivalence relation on the set of fuzzysubgroups of an arbitrary group G and give four equivalent conditions each ofwhich characterizes this relation. We demonstrate that with this equivalencerelation each equivalence class constitutes a lattice under the ordering of fuzzy setinclusion. Moreover, we study the behavior of these equivalence classes under theaction of a group homomorphism.
Fuzzy subgroup
Equivalence relation
Lattice
$alpha$– cut
Strong $alpha$– cut
Homomorphism
2006
10
21
75
91
http://ijfs.usb.ac.ir/article_469_c2215f9b01a891631d13665680641fbf.pdf
Iranian Journal of Fuzzy Systems
IJFS
1735-0654
1735-0654
2006
3
2
Persian-translation Vol.3 No.2, October 2006
2006
10
29
95
100
http://ijfs.usb.ac.ir/article_2915_641885b9def2867e23fa22368603d283.pdf