In this paper the suitability of different document representations for automatic document classification is compared, investigating a whole range of representations between bag-of-words and bag-of-phrases. We look at some of their statistical properties, and determine for each representation the optimal choice of classification parameters and the effect of Term Selection. Phrases are represent...

Please cite this article in press as: Y.-G. Jia Vis. Image Understand. (2008), doi:10.101 Bag-of-visual-words (BoW) has recently become a popular representation to describe video and image content. Most existing approaches, nevertheless, neglect inter-word relatedness and measure similarity by bin-to-bin comparison of visual words in histograms. In this paper, we explore the linguistic and onto...

certificateless public key cryptography (cl-pkc) is a useful method in order to solve the problems of traditional public key infrastructure (i. e. large amount of computation, storage and communication cost for managing certificates) and id-based public key cryptography (i. e. key escrow problem), simultaneously. a signcryption scheme is an important primitive in cryptographic protocols which p...

abstract:the paper begins by noting that proposals involving significant developments in the regional tradearchitecture are being developed within regional processes that in some cases are simultaneouslypursuing other dimensions of regional economic integration: monetary and financial cooperation inthe case of asean + 3, and the establishment of a common market in the case of asean. at leastthr...

abstract background: transcranial doppler ultrasonography results have not been previously studied in among iranian sickle cell anemia patients. the present study was performed to evaluate the pattern of intracranial flow velocities among iranian children with sickle cell anemia and the hematological parameters that can affect the time-averaged mean of maximum velocity in major intracranial art...

non-hodgkin lymphoma is very uncommon in infancy and skin as the primary site of involvement in non-hodgkin lymphoma is rarely encountered. we describe a 10-month-old infant with t-cell non-hodgkin lymphoma who presented with multiple skin nodules as the predominant feature of her disease. the clinical manifestations, treatment strategy and disease outcome are reviewed. key words: non-hodgkin l...