Most text retrieval systems are essentially based on bagof-words (BOW) text representations. Despite popularity of BOW, it ignores the internal semantic meanings of words since each word is treated as an atomic unit. Recently, distributed word and text representations become increasingly popular in NLP literatures. They embed syntactic and semantic information of words and texts into low-dimens...

The method based on Bag-of-visual-Words (BoW) deriving from local keypoints has recently appeared promising for video annotation. Spatial partition scheme has critical impact to the performance of BoW method. In this paper, we propose a new adaptive annular spatial partition scheme. The proposed scheme firstly determines the centroid of partition according to the distribution of keypoints. And ...

This paper describes the approach proposed by ARTEMIS-UBIMEDIA team at TRECVID 2012, Instance Search (INS) task [1]. The method is based on the Bag-of-Words representation obtained from uniform sampling of the frames of the videos. We propose a query expansion technique that employs the textual description of the queries to identify new instances of the query objects on Flickr in order to enric...

Representing videos by densely extracted local space-time features has recently become a popular approach for analysing actions. In this paper, we tackle the problem of categorising human actions by devising Bag of Words (BoW) models based on covariance matrices of spatio-temporal features, with the features formed from histograms of optical flow. Since covariance matrices form a special type o...

a r t i c l e i n f o a b s t r a c t The method based on Bag-of-visual-Words (BoW) deriving from local keypoints has recently appeared promising for video annotation. Visual word weighting scheme has critical impact to the performance of BoW method. In this paper, we propose a new visual word weighting scheme which is referred as emerging patterns weighting (EP-weighting). The EP-weighting sch...

A new planar bow-tie antenna is proposed here for UWB applications. The self-complementary principle has been applied to a planar triangular monopole antenna along with bending the microstrip feed line. The antenna has a wider frequency band compared to the traditional bow-tie antenna, complies with the UWB requirements and it is directly matched to the (SMA) connector via 50Ω microstrip feed l...

The paper reports an improved method of content-based image retrieval using a well-known method of bag-of words (BoW). Words built over descriptors of popular affine-invariant keypoint detectors (Harris-Affine and Hessian-Affine are exemplary choices) are used. What is novel, however, is the number of descriptors (i.e. the number of words) representing individual keypoints. Instead of SIFT (or ...

Bow hunter’s syndrome (BHS) is a rare symptomatic vertebrobasilar insufficiency in which vertebral artery (VA) is mechanically occluded during head rotation. Various pathologic conditions have been reported as causes of bow hunter’s stroke. To our knowledge, however, just two cases associated with complex cranio-cervical junction (CCJ) malformation with atlantooccipital assimilation were report...

In the last few years, many high quality and realistic violin synthesizers appeared. But the quality of the resulting sound is sometimes poorer than promised due to the lack of musical information provided to the system. It is very difficult for composers to deduce and include information like “bow speed”, “pressing force” or “fingering” to a MIDI file while real violinists base their musicalit...

To reduce the ship wave-making resistance, the lines of the bulbous bow of a hull are optimized by an automatic optimization platform at the ship design stage. Parametric modeling was applied to the hull by using non-uniform rational basis spline (NURBS). The Rankine-source panel method was used to calculate the wave-making resistance. A hybrid optimization strategy was applied to achieve the o...