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Given a set of objects $\mathcal {O}$<alternatives> <inline-graphic xlink:type="simple" xlink:href="yu-ieq2-2451630.gif"/></alternatives>, each with $d$<alternatives><inline-graphic xlink:type="simple" xlink:href="yu-ieq3-2451630.gif"/></alternatives> numeric attributes, a top-$k$<alternatives> <inline-graphic xlink:type="simple" xlink:href="yu-ieq4-2451630.gif"/></alternatives>...
A novel navigation system for the blinds is developed. A multi-functional navigation system is implemented on the Windows Mobile platform by extracting signals from Global Positioning System (GPS) as well as applying custom-built map sources. The Dijkstra's algorithm is optimized to tackle issues encountered in real-life applications. An external GPS receiver is attached, allowing more accurate localization...
This article analyzes the heritage of the Ningbo Group's spirit and the Ningbo businessmen's rising up. It points out the difference of entrepreneurship and innovation between the contemporary Ningbo businessmen and the other business groups; going by the successful experiences of other business groups' entrepreneurship and innovation; combining with the practical situations of the contemporary Ningbo...
This paper will present a new type of heat supply system, which provides both fresh air and heat. It helps save much more energy and greatly reduce the waste of heat than ever before, other than that, it also realizes the dynamic regulation of the outlet air temperature in this system. First, solar-powered water heaters heat the cold water in the pipes, and then it flows into two branch pipes. One...
Nowadays, observing target echo is becoming a very important way of detecting target. Among various kinds of characteristics about target echo to be measured, target strength can be got easily. In this paper, we introduce a model building of detecting the strength of target echo: segment the target surface into a lot of surface elements and then integral about them. With this model, we can calculate...
For investigating the impact of large citiespsila expansion on air pollution, some numerical experiments are employed by adopting the typical meteorological condition in this paper. The simulation results show that the urban development has great effect on the transportation and diffusion of pollution. The existent of Beijing downtown area leads to the decrease of the total allowable emission about...
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