Advanced Materials Research Vols. 171-172

Abstract: In order to meet the demands of high-quality talents raised by the nation, guide and inspire the college students’ hard thinking so as to get more fruits and improve their personal refinement, continuously promote the standard, systematic, and scientific construction of scientific innovation of our students, create a good atmosphere for the students’ participation into the scientific research and practice, and to cultivate high-quality comprehensive talents with innovation capability, in accordance with the reality of our college, we propose that taking the research program as the carrier, the students take part in the instructors’ scientific program. Meanwhile, the instructors are responsible for the scientific innovation activities of the students, and give evaluations in terms of working attitude, scientific quality, innovation capability, working effect. After several years’ exploration, a satisfied result is achieved.

Abstract: The image search engines have been effective tools to find pictures from the Internet. They provide a list of image items in response to a user’s query, and rank the items according to their relevance to the query. An image item is often accompanied with a short descriptive text, which is brief text summaries extracted from the webpage title, content, image caption, or its metadata, to provide auxiliary information about the image. In this paper, we present a new and effective descriptive text generation method by using the idea of summarizing an image’s surrounding text, using text’s position information, and finding an image’s nearest neighbors.

Abstract: Texture mapping technique is realized by texture filtering. Mipmap mapping technique use square filter to pre-filter the texture. Generally the image of it’s pixel on the screen is anisotropy, the method of use square as the filter is error to some extent, and the error make the projection not accurate. In this study, Mipmap texture mapping technology-based analysis of the principles and methods of pre-filtering, texture mapping for some systems require a higher accuracy, a former post as the rectangular quad division method, and the method in theory is discussed.

Abstract: Nowadays,the theory and technology of speech recognition have made great progress,but in actual usage,they worked not very well.For some usage on some certain conditions ,we designed a small list, isolated word recognizer. With this system, we chosed ARM9 as the processor,MFCC as the characteristic parameters of speech sequences and adopted DTW to do pattern matching, As a result,it achieved hign rate of recognition and performed perfectly.

Abstract: Wavelet analysis has been a powerful tool for exploring and solving many complicated problems in natural science and engineering computation. The definition of multiple pseudofames for subspaces with real number translation is proposed. The notion of a generalized multiresolution structure (GMS) of is also introduced. The pyramid decomposition scheme is derived based on a GMS. As a major new constribution the sufficient condition for the existence of multiple pseudoframes for subspaces is derived based on such a GMS.

Abstract: In this work, the notion of biorthogonal two-directional shortly supported wavelets with poly-scale is developed. A new method for designing two-directional biorthogonal wavelet packets is proposed and their properties is investigated by means of time-frequency analysis methodand, operator theory. The existence of shortly supported biorthogonal vector-valued wavelets associated with a pair of biorthogonal compactly supported vector-valued scaling functions is investigated. A new method for designing a class of biorthogonal shortly supported vector-valued wavelet functions is presented by using multiresolution analysis and matrix theory.

Abstract: In this work, the notion of orthogonal nonseparable quarternary wavelet packs, which is the generalization of orthogonal univariate wavelet packs, is introduced. The definition for orthogonal nonseparable quarternary wavelet packs is presented by iteration method. The orthogonality characters of quarternary wavelet packs are discussed. Three orthogonality formulas concerning these wavelet packets are estabished. Moreover, it is shown how to obtain new orthogonal bases of space from these wavelet packets.

Abstract: Wavelet analysis is nowadays a widely used tool in applied mathematics. The advantages of wavelet wraps and their promising features in various application have attracted a lot of interest and effort in recent years. In this paper, we develop the notion of a sort of multivariate vector wavelet wraps. A new approcah for designing the multidimensional vector wavelet wraps is formul- ated. Their characters are investigated by virtue of iterative method, time-frequency analysis metho- d and matrix theory. There biorthogonality formulas regarding the wavelet wraps are provided. Biorthogonality decomposition relation formulas of the space L2(Rn)r are obtained by constructing a series of subspaces of the vector-valued wavelet wraps. Moreover, several Riesz bases of space L2(Rn)r are constructed from the wavelet wraps.

Abstract: According to the basic theory of rock mechanics, fluid mechanics in porous medium, geologic mechanics, calculated mechanics and fluid-solid coupling seepage, a mathematical and numerical model of seepage field and stress field coupling is developed in porous medium and a computer program is designed with the method of finite element technique. The Coupling Law of depressurizing exploitation Seepage field /Stress field in porous medium is studied. By the method of numerical simulation the variation law of stress-strain with time and space around borehole of impermeable rock medium, variety law of rock physical properties parameters is studied. It can be seen from result that development and deformation of borehole elastic area mainly affected by ambiequal ground stress value, difference of ambiequal ground stress and rock material properties so on. But for the nonlinear rock medium, material plastic deformation is a key mechanics parameter closely related to distribution patterns of borehole stress. Therefore, based on rock mechanics experiment，it is necessary to further consider influence of plastic deformation mechanism to the stability of the borehole.

Abstract: Solar radiation is an important factor effecting indoor thermal environment. External decorative materials of buildings have different properties in absorbing, reflecting and re-radiating the solar radiation because of their different color, texture and degree of roughness. In this paper, based on the establishment of thermal gain or loss model of architectural enveloping structure, we analyzes the influence of solar radiation of different external decorative materials on energy-saving of buildings by theoretic analysis and calculation, which provides the reference for the selection of external decorative materials in architectural design.