This paper introduces the background of rough set theory, and then brought forward a new algorithm for finding optimal reduct and make comparison between the original algorithm and the improved one via the experiment about the nine standard datasets in the UL database to explain the validity of the improved heuristic algorithm.
This paper analyses several extended rough set models in incomplete information systems and proposes a tolerance relation based model of processing grey incomplete information systems, which is an extension to rough set models. The method of the model is: firstly partitioning the original incomplete information system by introduced threshold value, then… (More)
The Fe<inf>100−x</inf>Ga<inf>x</inf> (x = 15–21) Fe<inf>83</inf>Ga<inf>17</inf>Tb<inf>x</inf> (x = 0.2, 0.4, 0.6, 0.8) alloys were prepared by non-consumable arc-melting method. The microstructure and magnetostrictive properties of Fe<inf>100−x</inf> Ga<inf>x</inf> (x = 15–21)… (More)
In this paper, a method of data pre-processing in grey information systems was proposed to deal with grey information. The binning technique was introduced to smooth noisy data used for grey relative analysis. It constructed the function of grey relative coefficient for each null value and filled up the null value with the solution of the function. It also… (More)
In this paper, a new approach is proposed to model and control the temperature of a thermal barrel of a plastic molding machine. Usually the thermal barrel behavior is expressed in terms of a parameterized linear model to be used in control strategies design. We establish a new model based on the structure of a Takagi-Sugeno fuzzy system, and utilize the… (More)