Key Engineering Materials Vols. 480-481

Abstract: Digital mine is the extension of digital project used in mine, there still remains some problems to be solved. Especially， in the intelligent application in digital mine construction, “Smart engineering” is new ideal employed new technologies which make our live more smart. This paper proposed smart mine concept and ideal, which is the top level application demands of mine enterprise, and plays important roles in the future intelligent mine production. The focus of the study is on the smart mine construction built on the ‘smart’ combination of many new technologies and its contents on the basis of digital mine.

Abstract: A binary discernibility matrix attribute reduction algorithm of incomplete decision table is introduced in this paper, which takes the importance of attribute as the heuristic message. To obtain better attribute reduction, this paper constructs a metric formula of attribute importance and gives a binary discernibility matrix to present incomplete decision table. Based on the formula and matrix an attribute reduction algorithm of incomplete decision table is introduced. This algorithm solves the problem of the attribute selection when the frequencies of attributes are equal. The result shows that this method is simple and effective.

Abstract: This paper presents a FPGA-based implementation of the core algorithm of embedded real-time image compression technology. The algorithm is based on JPEG image compression method which is the most widely used. For the key part of the image compression, made a kinds of fast algorithms of 2D-DCT calculation. The 2D-DCT is decomposed into two 1D-DCT computing, and within the FPGA multiplier and adder using a complex method, so that it greatly reduced the complexity of FPGA and improved the processing speed of the image. And it achieved real-time compression of image requirements.

Abstract: Combined with practical experience and the actual situation of network operators, designed a large capacity, secure, reliable, low cost WLAN network layout program,Analyzed the feasibility of its verification. provide a reference for WLAN network planning and construction.