Life cycle assessment of designing and manufacturing products has received significant attention in the recent years. Analytic hierarchy process and fuzzy comprehensive evaluation approach on life cycle assessment of microwave tube furnace is used in this study. The effects of the evaluation aspects, such as environmental impact, resource consumption, economy, capability and function, on the mathematical model were systematically investigated. The process involves constructing hierarchical structure, comparing pairwise comparison matrices, establishing assessment criteria, setting weight matrix and fuzzy assessment matrix, and then calculating green degree of microwave tube furnace by fuzzy mathematical method and statistical technique. The results show that microwave tube furnace has a good green degree, which can fulfil the need for green manufacture, especially in energy consumption, processing time and environmental protection. The presented methodology is an easy and practical way to provide a mechanism for improving product quality with low resource consumption and less environment pollution. . His researches focus on microwave heating technology. He has published more than ten papers in many journals and conference proceeding.J.H. Peng received his PhD from Kunming University of Science and Technology, China, in 1992 and has a wide range of research experience and interest in microwave heating and unconventional metallurgy technology. He is currently the Director of the
Nanostructured Cu90Al10 alloy powders were prepared by high energy ball milling mechanical alloying (MA). Up to 10 at.% Al could be dissolved into copper by mechanical alloying at room temperature. Effects of milling time on phase transformation, structural characteristics, and mechanical property of powders were investigated by using X-ray diffraction (XRD), Optical Microscopy (OM) and microhardness tester. The results show: with increasing the milling time, the powder particle size increased gradually, and then it tended to be homogeneous. The grain size of the alloy decreased gradually, but the yield strength increased with the extension of the ball milling. After 30h milling, the grain size reached the minimum value of 9 nm, and the yield strength obtained the maximum value of 511 MPa.
ABSTRACT:At present, the traditional way of accessing to classified network in geographic spatial information services is using network gatekeeper and firewall etc. to ensure public and classified network communications links.However, the physical isolation between classified network and public network is crossed, which is bound to cause classified network potential security hazard. In Yunnan province space Land dynamic monitoring integration project, it proposed the point to point text message communication protocol and asynchronous transmission mechanism. Using geo-spatial information encryption processing and data compression processing method, it reduced the risk of data sensitivity and monitored, namely to ensure data security, which realized geographic spatial information services data communication effectively between classified network and public network in the rigid field conditions.
INTRODUCTION:In the process of land and resources law enforcement is commonly in the field, but it needs analyze and the query a large number of geo-spatial data which saved in classified network. Provided it accessing directly, it needs break through the physical isolation between the classified network and the network. Traditional access method using GPRS and 3G network, which expose the server to the Internet environment.Although network gatekeeper and firewall are used, the physical isolation between classified network and public network is crossed, which is bound to cause classified network potential security hazard.
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