Abstract Many atomic descriptors are currently limited by their unfavourable scaling with the number of chemical elements S e.g. length body-ordered descriptors, such as SOAP power spectrum (3-body) and (ACE) (multiple body-orders), scales ( N ) ν where + 1 is body-order radial basis functions used in density expansion. We introduce two distinct approaches which can be to overcome this for spec...

The MPEG-7 standards defines a set of descriptors to characterize the content of visual media [l, 2]. These visual descriptors, such as color and texture descriptors, have undergone extensive evaluation and development based on the application of retrieval ranking. Specifically, under query-by-example (QBE) paradigm, average normalized modified retrieval rank (ANMRR), a rate-accuracy like perfo...

This paper presents a comparative study of color and texture descriptors considering the Web as the environment of use. We take into account the diversity and large-scale aspects of the Web considering a large number of descriptors (24 color and 28 texture descriptors, including both traditional and recently proposed ones). The evaluation is made on two levels: a theoretical analysis in terms o...

This paper presents a new interest local regions descriptors method based on Hilbert-Huang Transform. The neighborhood of the interest local region is decomposed adaptively into oscillatory components called intrinsic mode functions (IMFs). Then the Hilbert transform is applied to each component and get the phase and amplitude information. The proposed descriptors samples the phase angles infor...

(Library and Information Science Abstracts) database records were consulted. After detailed comparisons, it was found that keywords provided by authors have an important presence in the database descriptors studied; nearly 25% of all the keywords appeared in exactly the same form as descriptors, with another 21% though normalized , still detected in the descriptors. This means that almost 46% o...

The protr package offers a unique and comprehensive toolkit for generating various numerical representation schemes of protein sequence. The descriptors included are extensively utilized in Bioinformatics and Chemogenomics research. The commonly used descriptors listed in protr include amino acid composition, autocorrelation, CTD, conjoint traid, quasi-sequence order, pseudo amino acid composit...