A new method of project time overrun risk estimation is proposed. The method takes into consideration various risk levels, corresponding to the project environment understood in a more or less wide manner, and interde...
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ISBN:
(纸本)9789814417730
A new method of project time overrun risk estimation is proposed. The method takes into consideration various risk levels, corresponding to the project environment understood in a more or less wide manner, and interdependencies between them. It is based on expert estimations expressed in linguistic terms, which are flexible and may be defined in each case accordingly to experts preferences. The method allows to insert buffers protecting the project planned deadline, taking into account the complex, interdependent risk factors - in contrast to the existing methods, which usually treat risk factors as independent.
In the mid 1990's, the morphological associative memory (MAM) was introduced as a distributive associative memory model that performs certain morphological operations defined in the mathematical theory of minimax ...
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ISBN:
(纸本)9789814417730
In the mid 1990's, the morphological associative memory (MAM) was introduced as a distributive associative memory model that performs certain morphological operations defined in the mathematical theory of minimax algebra. MAM models come in two different versions that are tolerant to different types of noise in the input patterns. To overcome this drawback, we resort to the more recent theory of mathematical morphology (MM) on inf-semilattices whose elementary operators are self-dual and we define an associative memory (AM) model in this framework.
Femtocells widely deployed in a macrocell forms hierarchical cell networks, has been regarded as one of the most promising approach. However owing to the absence of coordination between the macro and femtocells, and a...
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ISBN:
(纸本)9789814417730
Femtocells widely deployed in a macrocell forms hierarchical cell networks, has been regarded as one of the most promising approach. However owing to the absence of coordination between the macro and femtocells, and among femtocells, decentralized spectrum allocation between macro and femtocell users become technically challenging. In this paper, an optimal spectrum allocation scheme based on Stackelberg game is proposed, in which femto and macrocell base stations are players, and the same spectrum is the resource players will choose to assign users to minimize the affected interference among each other. The comparison results show that the proposed scheme might be a solution for efficiently allocating the spectrum in hierarchical cell networks, as the improvement in terms of outage probability and spectrum efficiency had been achieved.
The current study is aimed to investigate how fabrics' tactile properties can be perceived through products' visual representations. Two major steps are taken to unveil the visual compensatory mechanism. The f...
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ISBN:
(纸本)9789814417730
The current study is aimed to investigate how fabrics' tactile properties can be perceived through products' visual representations. Two major steps are taken to unveil the visual compensatory mechanism. The first step is to describe the mechanism. A novel method based on rough sets and fuzzy sets theories is proposed to extract principal visual features for each tactile property. In this part, the single-to-single and multiple-to-single correlations are studied by applying this method. The second step is to quantify the explored mechanism. A mathematical model between each tactile property and the corresponding principal visual features is established using an adaptive network-based fuzzy inference system (ANFIS). This model has been proved to be capable of predicting fabrics' tactile properties from the perceived visual features with a satisfactory accuracy.
Different variants of variable consistency dominance-based rough set approach (VC-DRSA) have been proposed by considering the ordinality and inconsistency of information systems simultaneously. These approaches focus ...
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ISBN:
(纸本)9789814417730
Different variants of variable consistency dominance-based rough set approach (VC-DRSA) have been proposed by considering the ordinality and inconsistency of information systems simultaneously. These approaches focus mainly on the criterion selection of rule generation, but rarely consider the effectiveness of decision results. In this paper, an extended dominance relation is induced into the variable-precision rough set (VPRS) and an extended variable consistency model under dominance-based rough sets is proposed. An illustration validates the feasibility of the proposed method.
In this paper, we first introduce some important concepts in fuzzy finite automata (FFA). And then we define bifuzzy source and bifuzzy successor operators of FFA, as well as discuss their basic properties and their e...
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ISBN:
(纸本)9789814417730
In this paper, we first introduce some important concepts in fuzzy finite automata (FFA). And then we define bifuzzy source and bifuzzy successor operators of FFA, as well as discuss their basic properties and their essential relationships. Afterwards, we study bifuzzy topologies derived from bifuzzy source and bifuzzy successor operators.
A heuristic is proposed for the Vehicle Routing Problem in this study. The heuristic has two phases that are named as clustering phase and routing phase, and also it has a local search. Firstly customers are assigned ...
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ISBN:
(纸本)9789814417730
A heuristic is proposed for the Vehicle Routing Problem in this study. The heuristic has two phases that are named as clustering phase and routing phase, and also it has a local search. Firstly customers are assigned to vehicles with proposed multi objective linear programming and fuzzy approaches are used to solve this model in clustering phase. Secondly clusters are routed with TSP classical integer mathematical model in routing phase. Finally local search is used to improve the solution. Some problems from literature are solved and results are given.
Formal concept analysis and rough set theory provide two different methods for data analysis and knowledge processing. Given a fuzzy context( U, A, (R) over tilde), one can get the fuzzy rough concept lattice L-delta(...
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ISBN:
(纸本)9789814417730
Formal concept analysis and rough set theory provide two different methods for data analysis and knowledge processing. Given a fuzzy context( U, A, (R) over tilde), one can get the fuzzy rough concept lattice L-delta(U, A, (R) over tilde) in Will's sense. Further, we apply the attribute reduction method for the concept lattices to the reduction of the fuzzy rough concept lattice. Finally, the experimental results show that the reduction method for the fuzzy rough concept lattice is effective in the reduction of the multiple rules and an important example is given.
In this paper a set of rules of Answer Set Programming is presented to represent and reason about points-to information in program written in object-oriented language like Java. Especially, path identification problem...
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ISBN:
(纸本)9789814417730
In this paper a set of rules of Answer Set Programming is presented to represent and reason about points-to information in program written in object-oriented language like Java. Especially, path identification problems such as forward and backward path problems in context of aliasing are well solved with these rules. A simple Java program is given to show the effect of our method.
When making a decision on the basis of multiple criteria the traditional AHP method does not take into account the fact that they may be interrelated. It is proposed that the traditional AHP method could be extended b...
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ISBN:
(纸本)9789814417730
When making a decision on the basis of multiple criteria the traditional AHP method does not take into account the fact that they may be interrelated. It is proposed that the traditional AHP method could be extended by applying fuzzy logic for aggregating the criteria into a single objective function. The application of consistent fuzzy logic is preferred since no conventional fuzzy set theory is in the Boolean frame. The basis of this approach is the Interpolative realization of Boolean algebra (IBA). The proposed approach is illustrated on the web service selection problem.
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