We investigate an air-slot photonic crystal cavity for high-precision refractive index sensing. The high quality factor approximately 2.6x10(4) of the cavity, along with a strong overlap between the resonant mode and the hollow core region, allows us to achieve an experimental sensitivity of 510nm per refractive index unit (RUI) and a detection limit below 1x10(-5)RUI. The device has a remarkab...

CLINICAL CHEMISTRY, Vol. 34, No. 6, 1988 1357 The index, of fiduciality is therefore equal to (CVi + CV)’/0.5 when it is <1.00 a method surpasses the goal and when it is >1.00 a method is analytically unsatisfactory. As an example, the following tabulation shows the index calculated from the median precision and comparative bias achieved (May to August, 1986) in the Australasian general serum c...

A new kind of feature for colour image retrieval based on DCT-domain vector quantisation (VQ) index histograms (DCTVQIH) is proposed. For each colour image in the database, 12 histograms (four for each colour component) are calculated from 12 DCT-VQ index sequences, respectively. The retrieval simulation results show that, compared with the traditional spatial-domain colour-histogram-based feat...

A novel information identification model is proposed to support accurate classification tasks with mixtures of categorical and real-valued attributes. This model combines the advantages of rough set theory and cluster validity method to promote the classification quality to the higher levels. Real-valued attribute values are pre-processed by fuzzy c-means clustering method and then analyzed by ...

For what we believe to be the first time, digital holographic microscopy is applied to perform optical diffraction tomography of a pollen grain. Transmission phase images with nanometric axial accuracy are numerically reconstructed from holograms acquired for different orientations of the rotating sample; then the three-dimensional refractive index spatial distribution is computed by inverse ra...

This paper has two primary purposes. First, it provides an elementary description and tutorial overview of the refracted-ray method of measuring fiber index profiles. Second, it presents new results concerning the theoretical foundation, the linearity and precision, and other aspects of the method. In particular, we find that index differences may be measured to 5% or better and conclude by sho...

This paper proposes two new compressed-domain features for color image retrieval based on the YCbCr color space. They are named Multi-Stage Vector Quantization Index Histograms (MSVQIH) and Mean-Removed Vector Quantization Index Histograms (MRVQIH). For each color component, to obtain the MSVQIH features, we extract two MSVQ Index histograms from the two stage VQ index sequences respectively. S...

For the transition from traditional to digital libraries, the large number of handwritten manuscripts that exist pose a great challenge. Easy access to such collections requires an index, which is currently created manually at great cost. Because automatic handwriting recognizers fail on historical manuscripts, the word spotting technique has been developed: the words in a collection are matche...

Several software tools index text of the World Wide Web, but little attention has been paid to the many valuable photographs. We present a relatively simple way to index them by localizing their likely explicit and implicit captions with a kind of expert system. We use multimodal clues from the general appearance of the image, layout of the Web page, and the words nearby the image that are like...

This paper discusses the implementation of Support Vector Machine (SVM) based ranking metrics to compute the similarity and rank the documents based on a user query using Fuzzy Logic. TREC dataset has been used for the same purpose. The dataset is parsed to generate keywords index which is used for the similarity comparison with the user query and ranking is done using SVM. Each query is assign...