In view of the deficiency of the traditional methods, based on the grey theory, GM (1, 1) model is established to predict the groundwater level. The proposed model was applied to predict the groundwater level in Xiaonanhai Spring. The prediction result was compared with that of the traditional method and the reported results in the Xiaonanhai Spring. It is indicated that the performance of the ...

With the increasing availability of information on the WWW (World Wide Web), it becomes more important and feasible to retrieve information efficiently. Query expansion is the process of supplementing an original query with additional terms in order to refine a search and increase retrieval effectiveness. If the query expansion is interactive, then the user and the system work together to expan...

This paper proposed a new weighted KNN data filling algorithm based on grey correlation analysis (GBWKNN) by researching the nearest neighbor of missing data filling method. It is aimed at that missing data is not sensitive to noise data and combined with grey system theory and the advantage of the K nearest neighbor algorithm. The experimental results on six UCI data sets showed that its filli...

In this paper, an interactive technique for extracting cartographic features from aerial and spatial images is presented. The method is essentially an interactive method of image region segmentation based on pixel grey level and texture information. The underlying segmentation method is seeded region growing. The criterion for growing regions is based on both texture and grey level, where textu...

Tumor segmentation of MRI Brain images is still a challenging problem. This paper proposes a fast MRI Brain image segmentation method based on Artificial Bee Colony (ABC) algorithm. The value in a continuous gray scale interval is searched using threshold estimation. The optimal threshold value is searched with the help of ABC algorithm . In order to get an efficient fitness function for ABC al...

This paper presents grey structure activity relationship analysis for phenolic acid phenethyl esters from the bioactivity on oral cancer SAS, OEC-M1 and human breast cancer MCF-7. First of all, 14 compounds of phenolic acid phenethyl esters are synthesized, while the bioactivity (cytotoxicity) on the cancer cells SAS, OEC-M1, MCF-7 is tested. Next, the relationship weighting of functional group...

This study focused on the optimization of Al—Mg to CuZn34 friction stir lap welding (FSLW) process for optimal combination of rotational and traverse speeds in order to yield favorable fracture load using Grey relational analysis (GRA). First, the degree of freedom was calculated for the system. Then, the experiments based on the target values and number of considered levels, corresponding orth...

With the rapid development of cloud computing, more and more cloud services are provided to users. Faced with multiple cloud services, how to scientifically predict and assess the performance of cloud service is an imperative task. To cope with the challenge, an prediction scheme via JOGM(1,1) model is proposed based on grey system theory, in which the performance of cloud service is quantified...

This paper puts forward a reliability estimation method by the Degradation Amount Distribution (DAD) of products, using a composite time series modeling procedure and grey theory based on a random failure threshold. Product DAD data are treated as a composite time series and described using a composite time series model to predict a long-term trend of degradation. The degradation test is proces...

In this paper, by further using the idea of equal dimension and new information,we propose a new dynamic analysis model which combines the unbiased first-order one-variable grey differential equation model (abbreviated as UGM(1,1) model) from grey system theory and Markov chain model from stochastic process theory. We abbreviate the new combined GM(1,1)–Markov chain (MC) model as ED&NI-MCUGM(1,...