Advanced Materials Research Vols. 430-432

Abstract: oak veneer furniture with bleach treatment process, and by orthogonal test method of oak veneer bleaching factors were analyzed to determine the bleaching process parameters, that is a certain quality and a certain fraction of the mass fraction of sodium hypochlorite oxalic acid composition of oxidized bleach treatment is better.

Abstract: Deep drawing dual phase steel was designed and trial-produced in the laboratory. The microstructure and recrystallization texture was studied using OM,TEM and XRD techniques. The results show that texture components typically in DP steels are γ (<111>//ND) and α (<110>//RD) fibers, which is partly attributed to the precipitation of Mo-based carbides in hot-rolled plate. Besides, {554}<225> and {332}<113> texture components are also founded in deep drawing DP steels, which are beneficial to improvement of drawability. With the increasing of annealing temperature, the tensile strength and elongation of DP steels are increased and decreased, respectively, and the r value is reduced slightly.

Abstract: In practice, surface residual stress test methods mainly contain the traditional semi-destructive central blind-hole method and the emerging non-destructive X-ray diffraction technology. The two methods process different measuring principle, which indirectly reflect material elastic deformation in macroscopic and microscopic fields respectively. Generally, comparative study of the feasibility of stress test scheme and accuracy of the measurements should be implemented experimentally. Surface residual stress levels and distributions of quenched high-strength aluminum alloy plate, shot-peened specimens and welded steel plate were tested by contrast using the two methods in this paper. The results show that both of the two surface stress measurement methods are effective and correct in most cases. But center blind-hole method is not suitable in measuring the gradient distribution with large stress gradient while X-ray method would be much affected by surface treatments and material microscopic inhomogeneity despite its capable of reflecting local details of the stress distribution. In engineering applications, proper test methods should be chosen according to the level and distribution of initial stresses. In addition, several methods are suggested to apply comparatively if conditions permitted.

Abstract: Web text mining is a new issue in the knowledge discovery research field. It is aimed to help people discover knowledge from large quantities of semi-structured or unstructured text in the web. Several approaches, including some pure and hybrid information retrieval (IR) methods, have been proposed to tackle such an issue. Among these approaches, combining the Self-Organizing Map (SOM) method with the principles of the vector-space model, appears to be a promising alternative for the traditional purely IR-based methods in this problem domain. The encoded documents are organized on another self-organizing map, a document map, on which nearby locations contain similar documents. Special consideration is given to the computation of very large document maps which is possible with general-purpose computers if the dimensionality of the word category histograms is first reduced with a random mapping method and if computationally efficient algorithms are used in computing the SOMs.

Abstract: The current paper studies the technology used in making mulch sheet out of softwood pulp. The best technology for mulch sheet manufacturing is determined by studying the effect of the beating degree, quantitation of the base paper, dosage, and usage of the Polyamide epichlorohydrin condition for the base paper properties. The transparency is found to be very good after the base paper is steeped in a self-made transparent agent. Degradability experiments conducted on soil suggest that the mulch sheet is completely degradable.

Abstract: In recent years, global warming has become a worldwide problem. The reduction of carbon dioxide emissions is a top priority for many companies in the manufacturing industry. In the automobile industry as well, the reduction of carbon dioxide emissions is one of the most important issues. Technology to reduce the weight of automotive parts improves the fuel economy of automobiles, and is an important technology for reducing carbon dioxide. Also, even if this weight reduction technology is applied to electric automobiles rather than gasoline automobiles, reducing energy consumption remains an important issue. Plastic processing of hollow pipes is one important technology for realizing the weight reduction of automotive parts. Ohashi et al. [1-2] present an example of research on pipe formation in which a process was carried out to enlarge a pipe diameter using a lost core, achieving the suppression of wall thickness reduction and greater pipe expansion than hydroforming. In this study, we investigated a method to increase the wall thickness of a pipe through pipe compression using planetary rolls. The establishment of a technology whereby the wall thickness of a pipe can be controlled without buckling the pipe is an important technology for the weight reduction of products. Using the finite element analysis method, we predicted that it would be possible to increase the compression of an aluminum pipe with a 3mm wall thickness by approximately 20%, and wall thickness by approximately 20% by pressing the hollow pipe with planetary rolls.

Abstract: The client is literally the start point of every architectural design. In architectural projects, complex as they are, it is unlikely that the clients would be able see all their needs from the very start. Demands and wantings float out of the surface as the design proceeds. Client-Architect meetings go on from the very start to the very end of each project. It is very likely that “client needs” also known as “design problems” to the architects may shift and change with time. Previously, research on design cognition focuses on the designer end and how they face “problem-solving”. Very often they forget these “problems” are alive. As the design progresses and grows so do client needs and demands. The goal of this research is to look into client-architect interaction in hope to conclude a cognitive model that can help us understand the dynamics.

Abstract: In order to improve the removal ability of hexavalent chromium on the synthetic zeolite, the synthetic zeolite was modified by FeSO_4, which was used to removal hexavalent chromium in groundwater. The results showed that the concentration of Cr (VI) can be reduced from 5.0mg/l to 0.03 mg/l, which meets the requirements of groundwater standards (0.05mg/l) by using modified zeolite in a liquid-to-solid ratio of 20 ml/g, pH=3 for 120 minutes. The adsorption of Cr (VI) on the modified synthetic zeolite could be described by the Langmuir and Freundlich adsorption isotherm. It is showed that the synthetic zeolite modified by FeSO₄ has good treatment effect and after treatment the pH of groundwater can reach around 6.8, which need no more pH adjustment.

Abstract: Raman spectra of the geometrically frustrated material sample β-Co2(OH)3Cl have first, to the best of our knowledge, been measured down to liquid nitrogen temperature using the experimental conditions of 10X-objective @ 60 mW and 50X-objective @ 5 mW, respectively. It is found that most Raman bands blueshift with decreasing the sample temperature, agreeing with the thermal expansion effect of common materials, but the Raman spectra from different experimental conditions are slightly different with each other at same temperatures. The difference between them has been explained by the local laser heating effect.

Abstract: The golden yellow marble sheet material pure like jade is very rare in nature. Many sheet materials have some flaws such as radiation, chromatic aberration, color bleeding, staining easily and acid etching, especially in China lacking high-quality yellow marbles. The research and development of golden yellow microcrystalline glass aim to produce golden yellow microcrystalline glass using common quartz sands and calcium carbonates can be found anywhere as main materials, and the product is an economical and environmental material compliant with national policies with great market potentials and investment & development prospect.