Liu Xing Peng

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Discrete features play an important role in data mining. How to best discretize continuous features has always been a NP-hard problem. This paper introduces diverse taxonomies in the existing literature to classify discretization methods, as well as idea and drawbacks of some typical methods. Furthermore, a comparison of these methods is studied. It's(More)
The biomass of spruce (Picea koraiensis) plantation in the Suiling district of Heilongjiang Province was systematicly studied. Net productivities and their distribution biomass of the stem, bark, branch, leaf and root on the arborous layer of spruce plantation from 6 to 31 a were investigated and stem analyses using mean sample method. The regression(More)
The paper built an analysis model of financial statements based on data mining methods, that is making data mining methods such as clustering, association rules and decision making tree work together to step by step go into deeper analysis of existing financial statements, during which a annual assets structure statement is worked out. The data used for(More)
With technology development of Electric Vehicles (EVs), whole vehicle charging will be the main method of EVs adding energy in the future. The whole vehicle charging station provides charging services by off-broad chargers for EVs, According to characteristics of whole vehicle charging station, this paper presents a mathematical model based on the queue(More)
The banknote recognition system based on hidden Markov models (HMM) is proposed. It is based on the empirical risk minimization (ERM) principle. Image preprocessing includes brightness equalization and tilt correction. In order to satisfy the high speed and reliability of the banknote processing system, the grid segmentation is used for features extraction.(More)
In recent years, we have seen unprecedented growth in the area of Online Social Networking (OSN) that is still keeping on day by day. Social networking websites such as Facebook, Google+, and Twitter are using widely by people to share personal and public information with friends, coworkers, colleagues, family and even with strangers . Facebook, one of the(More)
F-region electron density depletions associated with main ionization troughs in the high-latitude ionosphere are studied using EISCAT CP3 data of meridian scanning experiments. The troughs in our observations are found to appear mainly in dusk sector, extending from late afternoon to pre-midnight, with higher occurrence rate during equinox and winter.(More)
With the purpose of improving the problems in the existing research methods like high cost, poor diversity, low realistic level, insufficient emerging characteristics, a method for path-planning of Herding based on firefly algorithms is proposed in this paper according to the features of automatic aggregation scene in Group Animation. In the process of(More)
Protein tyrosine phosphatases (PTPs) are enzymes that catalyze protein tyrosine dephosphorylation of which Src homology phosphatase-1 (SHP-1) is one of the best-validated, a widely distributed intracellular tyrosine phosphatase that contains two SH2 domains. Down regulation of SHP-1 tyrosine phosphatases was significantly increased sensitivity to insulin in(More)
In this paper, the voltage-sharing performance of MOA (Metal-oxide Surge Arrester) for 1000kV UHV GIS is discussed using the secondary development of the finite element and boundary element numerical method by 3D simulation, ensuring the non-uniform rate of the voltage distribution can be controlled within 10%, reaches the requirements of electric field(More)