摘要: In order to make design for board to achieve the miniaturization, multi-purpose, recycling; and to pursue the energy conservation, saving materials, little waste, the closed circuit in the technology, it is necessary to carry on the research of green design for board. Based on analyzing requirement of the market adequately, green design for multi-purpose dovetail groove board is presented. The research primary including: Firstly, choice of material for green design of board; Secondly, design for disassembly of board; Thirdly, design for recycling & recovering of board; finally, applications of board. The research has certain theory value and the practice significance.
摘要: Painting education is one of the main intellectual development forms for early childhood, and the valuable experience in children healthy growth. This paper analyses the demand and psychophysical characteristics of 3-12 years old children, and proposes the design basis of children electronic painting tools. The main design points of children painting tools are summarized by means of integrating the design principles, which include production interestingness, function promotion, man-machine interactivity and handleability. Aim at satisfy the design idea for children painting tools, a series of innovation designs is developed in several acpects such as shape, color, function, use pattern and man-machine interaction.
摘要: Taking chairs for example, this article elaborates the difference and relationship between habitual thoughts and extended thoughts. The former is only thinking about “sitting”, while the later is emphasized on getting transcendent based on revealing main functions of chairs. It also exploits their other existing forms besides “sitting”. The final purpose is researching on the integration of main and additional functions of chairs effectively , so as to realize the differentiation and diversification of design innovation based on the homogenization of main functions.
摘要: Design for remanufacturing is an important content of remanufacturing engineering, and the remanufacturability of product is mainly determined in the stage of product design. Through developing study of product design for remanufacturing, it can promote the remanufacturability, and markedly enhance the efficiency of remanufacturing production. This paper give some relative concepts about product design for remanufacturing and remanufacturability based on total remanufacturing process, such as remanufacturability, and bring forward the remanufacturability research contents and qualitative design principals in the product design stage.
摘要: A novel beam demagnifier(a cone) is presented based on total internal reflection-refraction principle, and the light propagation characteristics inside the cone were studied by using ray-tracing method and computer simulation. This paper presents several proof-theoretic results concerning a cone as a beam demagnifier under certain conditions. When the semiapex angle of the cone is equal to a series of specific values an output beam is parallel to an incident beam, the beam's diameter narrows, and the demagnification ratio of the cone is a function of apex angle and there exists a series of extreme points; the demagnifier can be used in series so as to further narrow or magnify the diameter of incident beam.
摘要: Due to increased diversity of user needs and market globalization, use application and environment of the products have diversified. This causes the products are difficult to be designed. In other words, it is difficult for designers to find a unique design parameter value (a unique design solution) which assures the fluctuant products performance to be satisfied the design requirements. In such cases, the designers derive several values (range) of design parameters which can be adjusted by users or manufacturers and enable to satisfy the product performance by the adjustment. Unfortunately, the kind of design problems have not discussed sufficiently in the conventional robust design researches. This paper describes a robustness index which is applicable to such design problems and a mathematical consideration on a calculating method of the index using the Monte Carlo method.
摘要: To implement optimization for mechanical concepts acquired by function analysis more effectively, BP neural network is adopted to structure multilevel evaluation model, which capitalizes on the features of nonlinearity, self-organization, and fault tolerance of neural network. By using appropriate data sets to train the neural network, expertise is acquired and expressed using a trained weight and threshold matrix. Once evaluation objectives of each candidate are fuzzily quantified, converted into evaluation attribute value, and fed into the trained network model, the optimal concept can be obtained. During the process, neural network is used to solve the bottle-neck problem of knowledge acquisition and expression and can be viewed as knowledge base and reasoning engine for the optimization. Hence the proposed evaluation model can effectively deal with concept evaluation and optimization problem with multilevel objective system.
摘要: Influencing effects of additives CaF2, ZrB2 and MoSi2 on sintering performance and oxidation resistance of Zr-Al-O-N composites were investigated. The results showed that additives CaF2, ZrB2 and MoSi2 were beneficial to improve sintering density of Zr(Ca)-Al-O-N composites, and additives CaF2 and ZrB2 were beneficial to improve obviously bending strength of samples Zr(Ca)-Al-O-N composites and MoSi2 was contrary. After additives CaF2, ZrB2 and MoSi2 were introduced to Zr(Ca)-Al-O-N composites, oxidation resistance of Zr(Ca)-Al-O-N composites was improved, and relative superior or inferior of influence ranking of additives was MoSi2, CaF2, and ZrB2.
摘要: Recently developed bulk metallic glass (BMG) alloys have attractive mechanical properties for structural applications, and tungsten fiber reinforced bulk metallic glass matrix composite(BMGC) would further improve the properties compared to un-reinforced BMG. With INSTRON1196 test machine system and SHPB experimental system, quasi-static and dynamic compression experiments on tungsten fiber reinforced bulk metallic glass matrix composite were carried out. The material flow stress is about 2200MPa in quasi-static, and the dynamic flow stress of the material is around 2800MPa with strain rate of 740 s-1. The specimen fails with the form of axial cracks