Super-vector coding features extracted from both depth buffer and view-normal-angle images for part-based 3D shape retrieval

We have witnessed 3D shape models abundant in many application fields including 3D CAD/CAM, augmented/mixed reality (AR/MR), and entertainment. Creating 3D shape models from scratch is still very expensive. Efficient and accurate methods for shape retrieval is essential for 3D shape models to be reused. To retrieve similar 3D shape models, one must provide an arbitrary 3D shape as a query. Most of the research on 3D shape retrieval has been conducted with a “whole” shape as a query (aka whole-to-whole shape retrieval), while a “part” shape (aka part-to-whole shape retrieval) is more practically requested as a query especially by mechanical engineering with 3D CAD/CAM applications. A “part” shape is naturally constructed by a 3D range scanner as an input device. In this paper, we focus on the efficient method for part-to-whole shape retrieval where the “part” shape is assumed to be given by a 3D range scanner. Specifically, we propose a Super-Vector coding feature with SURF local features extracted from the View-Normal-Angle image, or the image synthesized by taking account of the angle between the view vector and the surface normal vector, together with the depth-buffered image, for part-to-whole shape retrieval. In addition, we propose a weighted whole-to-whole re-ranking method taking advantage of global information based on the result of part-to-whole shape retrieval. Through experiments we demonstrate that our proposed method outperforms the previous methods with or without re-ranking.     

Diffusion of low molecular weight substances into a fiber with skin-core structure—rigorous solution of the diffusion in a coaxial cylinder of multiple components

The diffusion equation of low molecular weight substances (penetrant) into a coaxial cylinder of multiple components (m) was formulated in general and solved rigorously. As the simplest but a practical case of m = 2, which corresponds to the diffusion of penetrant into fibrous material with skin and core structure, the diffusion of penetrant was analyzed in detail. That is, changes in the penetrant concentration distribution within the coaxial dual cylinder of skin and core components and the total amount of penetrant sorbed within the cylinder both with time after exposing the cylinder to atmosphere of fixed penetrant concentration of C_out were calculated with variation of the diffusion coefficient ratio (D₁/D₂) and the radius ratio (R₂/R₁), where D₁ and D₂ are the diffusion coefficients of penetrant in the core and the skin, and R₂ and R₁ are the radii of the fibrous material and the core, respectively. Keeping (R₂/R₁) at a constant value of 1.2 but varying (D₁/D₂) from 10⁴ to 10^?2, the penetrant concentration distribution was calculated and found to be much different particularly within the core between (D₁/D₂) > 1 and (D₁/D₂) < 1. The sorption curves were also found to deviate in their respective ways from that of Fickian curve of a homogeneous cylinder with (D₁/D₂) = 1 except at initial stage of sorption. Further, by keeping (D₁/D₂) constant but varying (R₂/R₁) from 1.1 to 1.5, the effects of relative skin thickness upon the sorption curve were studied.     

A 7.5-ns 32 K×8 CMOS SRAM

A 256 K (32 K×8) CMOS static RAM (SRAM) which achieves an access time of 7.5 ns and 50-mA active current at 50-MHz operation is described. A 32-block architecture is used to achieve high-speed access and low power dissipation. To achieve faster access time, a double-activated-pulse circuit which generates the word-line-enable pulse and the sense-amplifier-enable pulse has been developed. The data-output reset circuit reduces the transition time and the noise generated by the output buffer. A self-aligned contact technology reduces the diffused region capacitance. This RAM has been fabricated in a twin-tub CMOS 0.8-μm technology with double-level polysilicon (the first level is polycide) and double-level metal. The memory cell size is 6.0×11.0 μm² and the chip size is 4.38×9.47 mm ²     

Morphology and orientation of MoS2 clusters on Al2O3 and TiO2 supports and their effect on catalytic performance

The catalytic performance of MoS₂-based hydrotreating catalysts strongly depends on their morphology and orientation on the support. The effects of the morphology and orientation of MoS₂ clusters on supports, typically Al₂O₃ and TiO₂, on the catalytic performance are reviewed here, focusing on recently reported epitaxial relationships at the interface between MoS₂ clusters and the support.     

Preparation and characterization by thermal analysis of magnetic latex particles

Emulsion polymerization of styrene and methyl methacrylate in the presence of a ferrofluid was briefly studied. Thermal properties of the resulted latex particles were investigated by TG–DTA analysis. Determination of the residue weight after the thermal analysis that indicated complete decomposition of the organic components was found to be a facile and practical method to determine the magnetite content in the latex particles. The method was applied to magnetic polystyrene latex particles prepared in the presence of various amounts of the ferrofluid. Analysis of the results suggested that the magnetic content in the latex particles is primarily determined by the weight ratio of the ferrofluid to monomer. © 1993 John Wiley & Sons, Inc.     

Synthesis of mesostructured titanium dioxide films by surfactant-templated sol-gel method

Mesostructured titanium dioxide films have been synthesized by modifying sol-gel methods in the presence of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) block copolymer surfactants as a structure-directing agent. The synthesized films were analyzed using X-ray diffraction (XRD), field emission transmission electron microscopy (FE-TEM) and selected area electron diffraction (SAED). XRD investigation revealed that as-deposited and as-dried films showed a hexagonal arrangement. With increasing heat-treatment temperature, the mesostructure of the films degraded. From TEM and SAED studies, the degradation of the mesostructure can be explained by the grain growth of microcrystalline titanium dioxide.     

Ranges of low energy 119Sb and 125I in metals

Mean ranges of ¹¹⁹Sb in tin and ¹²⁵I in copper have been measured for the energy region of 10 keV to 60 keV by using the samples prepared by ion-implantation of these nuclides into vacuum-evaporated layers of metals. The observed ranges are in good agreement with those predicted by the theory of Lindhard et al. for 0.1 > ? > 0.02, but they are slightly smaller for 0.02 > ? > 0.01 in terms of the dimensionless energy ?.     

Expression of Tn and sialyl-Tn antigens in the neoplastic transformation of uterine cervical epithelial cells

The expression of simple mucin-type carbohydrate antigens, Tn and sialyl-Tn antigens, was evaluated by immunohistochemical staining with monoclonal antibodies in normal squamous epithelium, dysplasia, carcinoma in situ, and invasive squamous cell carcinoma of the uterine cervix. The expression of the Tn antigen detected by HB-Tn1 and B1.1 was found in 17 (20%) and 19 (23%) of the 83 invasive carcinomas, respectively, but was not found in the 36 normal squamous epithelia, 22 severe dysplasias, or 24 carcinomas in situ. The sialyl-Tn antigen was detected by HB-STn1 and TKH-2 in 14 (64%) and 11 (50%) of the 22 severe dysplasias, 13 (54%) and 10 (42%) of the 24 carcinomas in situ and 48 (58%) and 42 (51%) of the 83 invasive carcinomas, respectively, but was completely absent in 36 normal squamous epithelia. Coexpression of the sialyl-Tn antigen was observed in 89% of the cases expressing the Tn antigen. No significant difference was observed between the immunoreactivities of the antigens in the metastatic lymph nodes and primary tumors. No correlation was found between the expression of each antigen and clinical state, histologic type, depth of invasion, parametrial spread, lymphatic and vessel permeation, lymph node metastasis, or 5-year survival rate. The expression of Tn and sialyl-Tn demonstrates a specific change in the neoplastic progression from carcinoma in situ to invasive carcinoma and from normal to dysplasia, respectively, in squamous cell neoplastic lesions of the cervix. Tn and sialyl-Tn antigens may be useful markers for biologic investigation of neoplastic transformation in cervical squamous cell carcinoma.