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It is found that the GARCH (1,1) model has a good fitting effect on the time series by the statistical analysis of the logarithmic yield of the closing price of the Shanghai Composite Index. Therefore, this paper first uses the model GARCH (1,1) predicts the daily closing price of the Shanghai Composite Index, and then uses the Fourier series to correct the predicted residuals to obtain the final...
Public safety has been discussed for many years, but how to use and understand crime data is still difficult. Limitations of previous research were mainly restricted by technology. The significant technological advance since last century provided a tool for researchers to compute large amount of data and complicate models while shrinking process time too. This research tried to combine results from...
The essence of different modes of operation of the project lies in the difference of the outsourcing modes between owner and contractor. A better solution model is established based on the two typical characteristics of complex project outsourcing decision-making process-autocorrelation of the evaluation index and the flexibility of the owner's demand targets. To avoid improper expression and calculation...
Based on the GARCH model we study the characteristics of plate index on Chinese stock market in this paper. We analysis the characteristics of volatility in different industries and find indexes have different performance in the January effect test and the festival effect test. Finally, we use multivariate-GARCH model to study the dynamic relationship among different industries and the results show...
Social recommender systems are a recently introduced type of decision support system. One of the issues to be resolved in social recommender systems is the identification of opinion leaders in a network. The focus of this paper is the analysis of a network based on the interactions between users called behavioral analysis. The hypothesis explored in this paper is that Influence Rank can be quantified...
Based on establishing an evaluation index system of logistics center location, an integrated decision model is constructed by using the entropy method and grey related analysis. The weights of the evaluation indexes are defined by the entropy method. The quantitative process and comparison of the qualitative information are made by grey relation Analysis. This will reduce the subjective elements and...
This work deals with the modeling and simulation of the fretting hysteresis loop. Fretting represents a relative cyclic motion between two surfaces, having a non-uniform distribution of local relative displacement at their contact. Fretting damage is a complex contact phenomenon leading to crack initiation and/or material removal. The shape of the fretting hysteresis loop (loop-like variation of the...
According to the characters of the logistics center location project evaluation, considering that the incomplete and uncertain intraval attribute information of the logistics center location evaluation can be reflected effectively by the traditional extension decision-making model, Extension decision-making model with grey interval number is proposed based on the grey system theory. At the course...
The Markov prediction has been widely applied to simulate natural disasters in recent years as one of the modern prediction theories. This paper first uses Markov chain prediction to study the variation in wet and low water of annual precipitation. The prediction model is set up based on the rainfall data of Xianyang city from 1959 to 2006 and finally, the meteorological drought state of XIY city...
The non-destructive detection of winter wheat chlorophyll content is conducted based on the spectral analysis. After analyzing the canopy spectral reflectance of winter wheat in up stage and elongation stage, we do research on the correlations between ratio index and chlorophyll content, and between normalized index and chlorophyll content, and find that spectral reflectance in visible light region...
There are usually three methods for supplier slecetion, they have their own characteristics and are suitable for different environmental requirements. In real economic activity, supplier selection usually take place in the environment with insufficient information, the evaluation indicators of which show both the quantitative and qualitative characteristics. Grey system theory solved the evaluation...
In this paper, we consider a new channel probing scheme for opportunistic scheduling in the uplink of orthogonal frequency division multiplexing (OFDM)-based wireless systems. To reduce signaling overhead for the probing, we consider a two-step channel probing process; called pre-probing and mainprobing. Good subchannels are first estimated through the pre-probing process using a probing signal transmitted...
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