Papers by Keyword: Template

Abstract: Zinc and iron oxide nanoparticles were synthesized using natural bio-polymeric templates viz. cellulose and sodium alginate. Cellulose fibres from different sources viz. filter-and blot-papers, were used as templates for this purpose. The synthesized Zinc oxide nanoparticles were characterized by X-ray diffraction (XRD), fourier transform infra-red spectra (FT-IR), UV-Visible spectrophotomer (UV-Vis) and scanning electron microscopic (SEM) studies. XRD studied confirmed the formation of highly crystalline hexagonal wurtzite phase of ZnO in all the synthesized nanoparticles. The average crystallite sizes of the nanoparticles obtained using different templates, were well below 50 nm. Characteristics of the zinc oxide nanoparticles obtained by template-based techniques were compared with those obtained by co-precipitation technique. Influence of various templates on the characteristics of metal oxide nanoparticles was studied.

Abstract: Experiment prepared polystyrene microspheres with a diameter of 722nm, the template of polystyrene microspheres obtained through the self-assembly. The copper atoms fill the voids of the template by electrochemical deposition, after removing template, copper surface obtain regular arrangement of spherical cave structure. Copper surface with spherical cave modified fluorosilane by chemical method, The contact angle of the surface is 156.3 ° through contact angle measuring. Superhydrophobicity of prepared copper surface is because of two important factors, one is regular microstructure of spherical cave, the other is modification of fluoroalkylsilane.

Abstract: Molecular imprinting is a technique to produce a polymer called as molecularly imprinted polymer (MIP) that provides cavities to form a particular space generated by removing the template when the polymer has been formed. It will recognize a target that has the shape and physico-chemical properties similar or identical with those of template molecule. In this study, MIPs using atrazine as template have been made via the cooling-heating method. Initially the pre-polymer solution was cooled at a refrigerator for 1 h. Next, the polymerization was carried out at 70 °C for heating times of 90, 120, and 150 min. without nitrogen flow which is generally done for polymerization process. Characterizations were performed by employing a reversed-phase high performance liquid chromatograph (HPLC) and scanning electron microscope (SEM). From Scatchard plots, it was found that the equilibrium dissociation constant K_D and the apparent maximum number of binding sites B_max, which are written as (K_D, B_max), are (4.69 μM, 9.87 mmol/g), (4.54 μM, 9.56 mmol/g) and (3.52 μM, 7.44 mmol/g) for the heating times of 150, 120, and 90 min., respectively. This is verified by their SEM images showing that the broadest pore size distribution with the highest number of pores is in the MIP prepared under the heating time of 150 min. The MIPs therefore could be applied as an atrazine sensor and the MIP prepared under the heating time of 150 min. would give its best characteristics compared to the others.

Abstract: Porous alumina films are widely used as templates for fabricating one-dimensional (1-D) nanostructures such as nanowires or nanotubes. Using a two-step anodisation process, we have successfully optimized the growth conditions for fabricating highly ordered porous alumina films with pore diameters ranging from 20 to 150 nm, to be used as templates for 1-D nanostructure synthesis. The effects of the anodisation conditions on pore structure and the formation rate of the films were systematically studied. It was found that low electrolyte temperatures and agitations decreased the growth rate of the films but favored the process of pore ordering. Removal of oxide layer formed from first anodisation process and removal of barrier oxide at pore ends had an important bearing on pore morphology. Besides the stand-alone porous alumina films, we have also fabricated porous alumina films on rod-shaped Al substrates.

Abstract: Service composition based on template is a semi-automatic composition mechanism. It synthesizes delaying service binding and template-reusing to deal with the dynamicity of environment and increase the efficiency of service composition. A novel framework for service composition based on template is proposed in this paper for managing the templates and template instances. The framework is center with service community. Furthermore, to reuse the template instance, the framework includes a mechanism for managing template instance repository.

Abstract: As traditional Preformatted Paper Printing methods can't adapt to the changes of document style and they have made poor performance on document security, in this paper, we have presented a PDF-based solution for Preformatted Paper Printing. The solution consists of three levels, including data organization layer, template editing and configuration layer, and PDF file generation layer. The data organization layer is mainly to solve the problem of data extraction and summary from heterogeneous databases. The template editing and configuration layer focuses on solving the printing template design and data output mapping problem. The PDF file generation layer is mainly to generate and merge the PDF file using iTextSharp component. The scheme can flexibly adapt to changes in content and style, set up parameters simultaneously to prevent a tamper, and undertake operations such as reprint, archive, distribution and so forth. At last, we have verified the solutions performance by the case of university admission notice-Generating. The result shows that our solution is effective.

Abstract: ZnO nanoparticles were synthesized by using N, N-dimethylformamide as solvent and poly(styrene-b-butadiene-b-styrene) SBS-OH as stablizer at 100°C through “in situ” reaction process. The optical properties and morphologies for the synthesized ZnO nanoparticles were measured through UV-Vis, PL and TEM methods. The results show that corona-embedded ZnO nanoparticles could be obtained by SBS-OH micelles in polar solvent DMF. The obtained ZnO nanoparticles could give an apparent quantum size confinement effects and PL results show that ZnO nanoparticles could give good luminescence properties.

Abstract: Pose estimation of 3d object is a hot research in the field of computer vision. This paper presents a novel pose estimation method based on colored markers. To overcome the effect of the luminance and other colors, this method uses the HSV color space and isolates the colors operating only on chromaticity plane where value (V) has no actual effect for identifying the colored regions of interest. The template is then applied on the remaining colors in order to find the center of the region. The pixels which have the same color but are not in the marker area are excluded, since they are considered noisy. The template guarantees the stability and efficiency of the extraction of the feature points. Compared with the CDT algorithm, the proposed method can extract reliable center points, and has higher accuracy in pose estimation for planar rigid objects. At last, experimental results demonstrate the efficiency of the method.

Abstract: In recent years, cloud computing technology has become the most popular field in IT industry, and it has changed the traditional IT technical architecture, development and deployment model in enterprise. Existing cloud management platforms tend to focus only on a single-level resources management, lack of a management platform that combines infrastructure resources, application platform deployment and monitoring services. This paper has designed a deployment-architecture that supports application platform in multi-cloud environment. It helps users deploy the required platform dynamically via self-help tool, frees users from infrastructure management, and provides common and inheritable deployment architecture for infrastructure environment.

Abstract: Carbon nanotube (CNT) is one of the most attractive nanomaterials which may be used in many potential applications of nanotechnology due to its excellent mechanical, electrical and thermal properties. We demonstrated the fabrication of carbon nanotube at the surface of anodic aluminum oxide (AAO) membrane by chemical vapor deposition (CVD) method. Acetylene was used as a hydrocarbon source and Fe as catalyst. CNT was synthesized at different temperature. The iron catalyst was confined in the holes of the AAO membrane. A variety of carbon structures such as nanotubes, helices, spiral, and hook-like curved shapes in the range of micrometer were synthesized. High graphitic multiwall carbon nanotube (MWCNT) was found at 700-750°C temperature.