In order to separate the conflict of the traffic flow effectively, time delay, number of stops and traffic capacity are chosen as performance indexes, and the objective function related to the cycle time and the saturation of an intersection is established by using the weighting coefficients. Then, based on the uncertainty and convergence analysis of ant colony algorithm (ACA), computational ex...

An automatic color-based image recognition approach is presented in this article. A set of digital images will be clustered in several classes on the color similarity basis. The images are featured using LAB color space. Then, the obtained color-based feature vectors are clustered using a novel automatic unsupervised classification algorithm based on validation indexes. Some experiments, perfor...

Electronic commerce depends on credit system much more than traditional commerce. Credit problem becomes the bottleneck in the development of electronic commerce. Since it is the research basis and object for wholly credit evaluation, how to design the Indexing system of enterprise credit evaluation in B2B is very important. The paper tries to establish the Indexing system with consideration th...

The concept of Genealogical Sorting Indexes (GSIs) was first introduced by Cummings et al. [1]. Given a set of observations belonging to different groups (represented in the form of a hierarchial tree), the Genealogical Sorting Index (GSI) value obtained for a particular group provides a quantitative measure of how closely the observations belonging to this group have clustered in the given tre...

In this paper we discuss the procedures to test a global search algorithm applied to a space trajectory design problem. Then, we present some performance indexes that can be used to evaluate the effectiveness of global optimization algorithms. The performance indexes are then compared highlighting the actual significance of each one of them. A number of global optimization algorithms are tested...

the credit portfolio management and the optimal credit portfolio selection are identified as one of the most effective factors in banks’ credit risk. two main strategies in this regard include diversification versus concentration. in this study, at first, the status of diversification of iran’s banking sector is analyzed, then the relationship between diversification of the credit portfolio and...