A words-of-interest model of sketch representation for image retrieval

In this paper we propose a method for sketch-based image retrieval. Sketch is a magical medium which is capable of conveying semantic messages for user. It’s in accordance with user’s cognitive psychology to retrieve images with sketch. In order to narrow down the semantic gap between the user and the images in database, we preprocess all the images into sketches by the coherent line drawing algorithm. During the process of sketches extraction, saliency maps are used to filter out the redundant background information, while preserve the important semantic information. We use a variant of Words-of-Interest model to retrieve relevant images for the user according to the query. Words-of-Interest (WoI) model is based on Bag-ofvisual Words (BoW) model, which has been proven successfully for information retrieval. Bag-of-Words ignores the spatial relationships among visual words, which are important for sketch representation. Our method takes advantage of the spatial information of the query to select words of interest. Experimental results demonstrate that our sketch-based retrieval method achieves a good tradeoff between retrieval accuracy and semantic representation of users’ query

Effects analysis of three kinds of operation methods in treatment of dacryocystitis

AIM: To investigate the effects on patients with chronic dacryocystitis treated with three methods: external dacryocystorhinostomy(EDCR), intranasal endoscopic dacryocystorhinostomy(IEDCR)and Nd:YAG laser dacryoplasty, and to explore the best operation method. <p>METHODS:Totally 182 cases(202 eyes)were randomly divided into three groups, using EDCR, IEDCR and Nd:YAG laser dacryoplasty respectively, postoperative follow- up lasted 6-24months.<p>RESULTS: The success rate of three groups were 93.9%, 92.3% and 71.1% respectively. There was not significant difference between group EDCR and group IEDCR(<i>P</i>>0.05). There was significant difference between group Nd:YAG laser dacryoplasty and other two groups(<i>P</i><0.05).<p>CONCLUSION: EDCR and IEDCR are effective methods. Especially IEDCR is minimal invasive technique and worthy of promotion and application

2,4-Disulfanyl-6-[(E)-(2-sulfanylbenz­yl)imino­meth­yl]phenol

In the title compound, C14H13NOS3, the dihedral angle between the benzene rings is 73.26 (5)° and an intra­molecular O—H⋯N hydrogen bond occurs

Diaqua­bis[2-(4-bromo­phen­yl)acetato]bis­(N 4,N 4-dimethyl­pyridin-4-amine)copper(II)

In the title compound, [Cu(C8H6BrO2)2(C7H10N2)2(H2O)2], the CuII atom (site symmetry ) adopts a Jahn–Teller-distorted trans-CuN2O4 octa­hedral coordination, with the aqua O atoms in axially extended sites. An intra­molecular O—H⋯O hydrogen bond helps to establish the conformation and an inter­molecular O—H⋯O hydrogen bond is seen in the crystal packing

User-adaptive sketch-based 3D CAD model retrieval

3D CAD models are an important digital resource in the manufacturing industry. 3D CAD model retrieval has become a key technology in product lifecycle management enabling the reuse of existing design data. In this paper, we propose a new method to retrieve 3D CAD models based on 2D pen-based sketch inputs. Sketching is a common and convenient method for communicating design intent during early stages of product design, e.g., conceptual design. However, converting sketched information into precise 3D engineering models is cumbersome, and much of this effort can be avoided by reuse of existing data. To achieve this purpose, we present a user-adaptive sketch-based retrieval method in this paper. The contributions of this work are twofold. Firstly, we propose a statistical measure for CAD model retrieval: the measure is based on sketch similarity and accounts for users’ drawing habits. Secondly, for 3D CAD models in the database, we propose a sketch generation pipeline that represents each 3D CAD model by a small yet sufficient set of sketches that are perceptually similar to human drawings. User studies and experiments that demonstrate the effectiveness of the proposed method in the design process are presented

An Updated Search of Steady TeV γ−\gamma-Ray Point Sources in Northern Hemisphere Using the Tibet Air Shower Array

Using the data taken from Tibet II High Density (HD) Array (1997 February-1999 September) and Tibet-III array (1999 November-2005 November), our previous northern sky survey for TeV $\gamma-$ray point sources has now been updated by a factor of 2.8 improved statistics. From $0.0^{\circ}$ to $60.0^{\circ}$ in declination (Dec) range, no new TeV $\gamma-$ray point sources with sufficiently high significance were identified while the well-known Crab Nebula and Mrk421 remain to be the brightest TeV $\gamma-$ray sources within the field of view of the Tibet air shower array. Based on the currently available data and at the 90% confidence level (C.L.), the flux upper limits for different power law index assumption are re-derived, which are approximately improved by 1.7 times as compared with our previous reported limits.Comment: This paper has been accepted by hepn

Synthesis, Crystal Structure and Antibacterial Activity of (E)-N- (2,3,4-Trimethoxy-6-methylbenzylidene)-4-methylbenzenamine

Abstract: The title compound (E)-N-(2,3,4-trimethoxy-6-methylbenzylidene)-4-methylbenzenamine (C 18 H 21 NO 3 , M r = 299.36) was synthesized and characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. The crystal belongs to monoclinic, space group P2 1 /c, with a = 7.7239(9), b = 27.287(2), c = 8.412