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At most time, supply chain is a hybrid dynamic system composed of continuous material flow, discrete information flow and their interaction. Traditional method of modeling and simulation of supply chain looking supply chain as discrete event system can't reflect systemic dynamic complexity. In this paper, two kinds of order decision-making simulation model of supply chain, discrete model and discrete-continuous...
In the covering information system with decision-making (CISD), τ-lower and upper approximation operators are introduced, and some corresponding properties are discussed. This paper also explores reductions of a covering which is based on a new concept of the degree of approximate dependency, and proposes a reduction algorithm based on the importance degree. After reduction, a decision tree is generated...
Hierarchical classification problems have been wide investigated in the past years. The available hierarchical classification methods, which use the top-down level-based scheme, often suffer from the burden of inter-level error transmission. In this paper, an instance-centric hierarchical classification framework based on decision-theoretic rough set model is proposed. The procedure of classification...
At present there are still some problems in the automatic test paper-making-system: The first is about the test question including graphs; The second is about the test question including formula; The third is about the difficulty degree of the test question which is set in advance and fixed, and can't be adjusted to meet the new need when the ability of examinees has changed; The forth is repetition...
In this paper, the facial expression recognition (FER) is investigated based on the observation that a sequence of images of a certain facial expression define a smooth manifold. First, local binary pattern (LBP) algorithm is used to extract the local texture features of the expression images. Then, locally linear embedding (LLE) method is used to learn the structure of the expression manifold in...
In this article, firstly, the necessary and sufficient condition of upper (lower) completeness is attained. Secondly, the notion of upper (lower) contraction of a mapping between quasi-metric spaces is put forward. Considering the asymmetric of quasi-metrics, the concept of left (right) fixed point of a mapping from a quasi-metric space to itself is proposed. Finally, two fixed point theorems in quasi-metric...
This paper proposes a fast user-independent method for handwritten digit recognition. The local feature of inputting strokes is firstly coded according to the eight equiangular encircled directions. Inputting digit is then modeled with a set of rules defined with the code of local features to characterize the drawing style of inputting digit. The decision tree learning is also invoked to model the...
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