Papers by Keyword: CBD

Paper TitlePage

Authors: Cheol Rim Choi, Young Jae Song
Abstract: An extensive work has been done, across a number of fields, in modeling organizational processes. A tension has existed between the attempts to provide a rich expression of organizational activities and the desire to support the work as it actually takes places. A static business process is characterized by stable network connections, use of powerful computing devices, and an easy access to various knowledge sources within the corporate Intranet. In modeling a business process into a component, a major challenge is whether the mechanism of component combination at the code-level is readily available. Currently there is little experience concerning the modeling of relationships between components and their communication for business processes. It is considered that the connector should take charge of interactions between the software components and the associated information about the component composition, role and specification. This paper proposes business process composition method for development of web applications. Specifically we focus on the interactions of the connectors that are the interfaces between the business processes in web component. We describe the method and demonstrate that this algorithm is able to process components and interfaces. We then show the viability of this method by implementing a simple stock trading system.
Authors: Tai Quan
Abstract: Chemical bath deposited ZnS thin films are promising buffer layers for thin film solar cells, replacing the environmentally hostile CdS buffer layers currently in use. Reflection, absorption and scattering are the three main light loss mechanisms in buffer layers. In this work, improved process conditions, such as magnetic stirring and air annealing, are used in the chemical bath deposition of ZnS thin films to optimize their surface morphology, which effectively reduces light scattering and increases the transmittance, resulting much better ZnS thin films.
Authors: Jin Xing Shen, Chang Jiang Zheng
Abstract: Central business district (CBD) is the crucial area in modern metropolitan areas. In this study, an evaluation system is proposed to help transportation professionals determine the reasonable scale of road network in CBD. The evaluation system consists of two parts, including a indicator system and a selection system. The indicator system is based on the measurement of several parameters such as the regional road traffic capacity, smoothness of regional road network, unit road load, and regional road network structure, etc. The selection system uses the maximum entropy with the results of the indicator system to select the reasonable road network scale. A case study is also conducted to apply the whole evaluation system to Huaqiao central business district. The research results show that the evaluation system developed in this study can be used as a useful guidance for determining a reasonable road network scale for the city central business district in metropolitan areas in China.
Authors: Min He, Wan Yi Zhang
Abstract: This paper starts from the analysis of CBD concept, characteristics and impact on habitat environment to study and learn successful experience of CBD at home and abroad, aims at the related basic conditions of Chengdu, a regional central city to engage in discussion about Chengdu CBD building from the development positioning, planning concepts , transportation, construction, comprehensive facilities, landscape, human environment and other aspects so as to explore a CBD building path suitable for development of regional central cities in China.
Authors: Ren De Fang, Gui Shan Liu, Tie Cheng Ma, Er Rong Cai, Tong Feng, Zhi Qiang Hu, Hong Shun Hao
Abstract: The CdS films were deposited on soda lime glass (SLG) substrate by Chemistry Bath Deposition (CBD). The influence of cadmium concentration on structure and properties of CdS films had been investigated. The phase compositions of the films were characterized by X-ray diffraction (XRD). The microstructure of the films was observed by Scanning Electron Microscope (SEM). The transmittance of the films was measured by Ultraviolet-visible Spectrophotometer. The results show that the cadmium concentration has great influence on Crystallite structure and grain size of the films. Under the condition of Cd2+ concentration of 0.006mol/L, the crystalline degree of the film is higher and the crystal growth is more remarkable, which help to make great progress on transmittance and optical band gap of the films.
Authors: Anis Akkari, Meriem Regima, Cathy Guasch, Najoua Kamoun Turki
Abstract: Abstract. Zinc blend tin sulphide thin films have been successfully prepared on Pyrex substrates using low cost chemical bath depositiontechnique. In this work, we study the effect of time deposition on the physical properties of SnS thin film. A 200 nm thick layer is obtained as an optimum value for deposition time td equal to four hours. X-Ray diffraction study shows that SnS exhibits a zinc blend structure with preferential orientations (111)ZB and (200)ZB. Optical analyses by means of transmission T(λ) and reflection R(λ) measurements allow to determine the direct band gap energy value ≈1.7 eV. Thin layers of tin sulphide exhibit a high absorption coefficient up to 1.5×106 cm-1 in the visible domain, indicating that SnS compound has absorbing properties favorable for applications in solar cell devices.
Authors: Shu Wang Duo, Huan Ke, Ting Zhi Liu, Hao Zhang
Abstract: ZnS films have been deposited on glass by chemical bath deposition (CBD). The optical and structural properties were analyzed by UV-VIS spectrophotometer and X-ray diffraction (XRD). The results showed that different sides of glass substrate have different thicknesses of the ZnS thin films, which can affect the optical and structural properties of ZnS thin films. The ZnS films of the side of glass substrates back to the solution center are thicker than that of the other side, and the ZnS films from ZnSO4 are thicker than that from Zn (NO3)2. The transmittances lower with the thicknesses of ZnS films increasing. The band gaps exhibit blue response with the thicknesses of ZnS films increasing. From the sides of glass substrates back to the solution center, the (111) reflection of the sphalerite structure can be observed at about 2θ=29.1°, while from the other side toward the solution center showed no significant peak.
Authors: Huan Ke, Shu Wang Duo, Ting Zhi Liu, Hao Zhang, Xiao Yan Fei
Abstract: ZnS films have been deposited on glass substrates by chemical bath deposition (CBD). The optical and structural properties were analyzed by UV-VIS spectrophotometer and X-ray diffraction (XRD). The results showed that the prepared thin films from the solution using N2H4 as second complexing agent were thicker than those from the solution without adding N2H4 in; this is due to using second complexing agent of N2H4, the deposition mechanisms change which is conductive to heterogeneous deposition. When using N2H4 as second complexing agent, the crystallinity of ZnS thin films improved with a significant peak at 2θ=28.96°which can be assigned to the (111) reflection of the sphalerite structure. The transmittances of the prepared films from the solution adding N2H4 in as second complexing agent were over 85%, compared to those from the solution without N2H4 (over 95%). The band gaps of the ZnS films from the solution using N2H4 as second complexing agent were larger (about 4.0eV) than that from those from the solution without N2H4 (about 3.98eV), which indicated that the prepared ZnS films from the solution adding N2H4 in as second complexing agent were better used as buffer layer of solar cells with adequate optical properties. In short, using N2H4 as second complexing agent, can greatly improve the optical and structural properties of the ZnS thin films.
Authors: Akiko Mochihara, Kenji Yoshino
Abstract: ZnS films are formed by chemical bath deposition using variety zinc sources such as zinc acetate (Zn (CH3COO)2), zinc sulfate (ZnSO4), zinc nitrate (Zn (NO3)2), iodide zinc (ZnI2), zinc chloride (ZnCl2) and zinc acetyl (Zn (acac)2). X-ray diffraction results show all broad spectra of ZnS. It is considered that amorphous ZnS can be grown. All samples show high transmittance. It is deduced that the decrease of transmittance around 3.7 eV is due to the ZnS band gap. Scanning electron microscopy shows that grain size becomes large with decreasing the instability constants of the zinc sources. It is assumed that zinc becomes ionization with decreasing the instability constants. All samples show a signal of O-H bond from fourier transform infrared spectra. It is assumed that the Zn (OH)2 exists in each sample.
Authors: Abbas M. Selman, Zainuriah Hassan
Abstract: Effects of annealing treatment on growth of rutile TiO2 nanorods on structural, morphological and optical properties of TiO2 nanorods were investigated. The nanorods were fabricated on p-type (111)-oriented silicon substrates and, all substrates were seeded with a TiO2 seed layer synthesized by radio-frequency reactive magnetron sputtering system. Chemical bath deposition (CBD) was carried out to grow rutile TiO2 nanorods on Si substrate at different annealing temperatures (350, 550, 750, and 950 °C). Raman spectroscopy, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analyses showed the tetragonal rutile structure of the synthesized TiO2 nanorods. Optical properties were examined by photoluminescence spectroscopy. The spectra exhibit one strong UV emission peak which can be seen at around 390 nm for all of the samples. In the visible region, TiO2 demonstrated two dominant PL emissions centered at around 519 and 705 nm. The experimental results showed that the TiO2 nanorods annealed at 550 °C exhibited the optimal structural properties. Moreover, the CBD method enabled the formation of photosensitive, high-quality rutile TiO2 nanorods with few defects for future optoelectronic nanodevice applications.
Showing 1 to 10 of 16 Paper Titles