An opportunistic relay selection based on instantaneous knowledge of channels is considered to increase security against eavesdroppers. The closed-form expressions are derived for the average secrecy rates and the outage probability when the cooperative networks use Decode-and-Forward (DF) or Amplifyand-Forward (AF) strategy. These techniques are demonstrated analytically and with simulation re...

This paper presents a novel differential evolution algorithm (called CCDE) using self-adaptive scaling factors, chemotaxis by BP technique, and cooperative strategy to enhance the performance of traditional DE algorithm. The CCDE consists of modified mutation strategy which is implemented from each individual and includes the momentum of each individual, the self-adaptive scaling factor strateg...

Group cohesion and consensus have primarily been studied in the context of discrete decisions, but some group tasks require making serial decisions that build on one another. We examine such collective problem solving by studying obstacle navigation during cooperative transport in ants. In cooperative transport, a group of ants works together to move a large object back to their nest. We blocke...

We argue that there are two qualitatively different modes of using a machine-readable dictionary in the context of research in computational linguistics: batch processing of the source with the purpose of collating information for subsequent use by a natural language application, and placing the dictionary on-line in an environment which supports fast interactive access to data selected on the ...

Facial makeup significantly changes the perceived appearance of face and reduces accuracy recognition. To adapt to application smart cities, in this study, we introduce a novel joint subspace low-rank coding method for exploit more discriminative information images, use feature projection technology find proper learn dictionary such subspace. In addition, constraint learning. Then, design learn...

Dictionary use can improve reading comprehension and incidental vocabulary learning. Nevertheless, great extraneous cognitive load imposed by the search process may reduce or even prevent the improvement. With the help of technology, dictionary users can now instantly access the meaning list of a searched word using a mouse click. However, they must spend great cognitive effort identifying the ...

Dictionary markup (encoding) is one of the concerns of TEI (Text Encoding Initiative), an international project for text encoding. In this paper, we investigate ways to use and extend TEI encoding scheme for the markup of Korean dictionary entries. Since TEI suggestions for dictionary markup are mainly for western language dictionaries, we need to cope with problems to be encountered in encodin...

In this paper, we propose a cooperative strategy for OFDMA radio resource allocation based on game theory. The main novelty with respect to state-of-the-art is that the utility function considers the application-oriented Mean Opinion Score (MOS) rather than the gross data rate attributed to each user flow. In such a scenario, data flows compete in cooperative way in order to maximize the percei...