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Temperature vegetation dryness index (TVDI) is widely used for its physical significance. In this study, using the historical MODIS data, we consider Henan Province, a large grain province in Central China, an example for constructing feature space and calculating TVDI. Multi- and single-group image approaches are then compared, and the applicability of the TVDI in Henan Province is analyzed through...
In this paper, a new measure of correlation is introduced in undirected network. In order to get accurately degree distribution for the vertex at the end of a randomly chosen edge, we considered the information of edge, rather than just the degree distribution of node. We analysis the Enron Email Network with the three measures via degree-degree correlation, and get more information than the traditional...
Influence of soil organic matter (SOM) on the adsorption, desorption and transport of polycyclic aromatic hydrocarbons (PAHs) has already been given full investigation in soils. In this paper, High Performance Liquid Chromatography (HPLC) was used to detected and elucidate aqueous leaching of PAHs in different types of soil with soil columns, which enhanced understanding on transport of PAHs appreciably...
This paper presents regional trends in vegetation greenness in Inner Mongolia Autonomous Region, semiarid areas of China. We used NOAA GIMMS NDVI data from 1982 to 2006 to explore the relationship between vegetation greenness change and climatic and anthropogenic factors based on the analyses of meteorological data, high spatial resolution remotely sensed data and local economic statistical data....
In this paper, we use mathematical method to study the model of complex network, analysis the network characters, use statistics, entropy and visualization reasoning analysis to get these characters. Then we give the three layer model for service, host and network to present network, and set up the system of network characters management.
A novel image registration algorithm based on octa-log-polar Fourier transform (OLPFT) for estimating large translations, rotations, and scalings in images is presented. The OLPFT, which is calculated at points distributed at non-linear increased concentric octagons, approximated log-polar Fourier representations of images accurately. And it can be calculated fast by utilizing the Fourier separability...
Network security situation is a hot research realm in the area of network security, which helps security analysts to solve the challenges they encounter. This paper presents the evaluation index, and the characteristic attributes to describe the state of network situation, discusses the grey model includes grey correlation model and grey forecast algorithm to get the evaluation index and predication...
In this paper we focus on the electric power load in Beijing during this great Olympics to analyze their dynamic fluctuation and find the relationships between electric and other factors (i.e. the highest temperatures). The ARMA process is used here to illustrate the series trends and do the next day's prediction. We also do some research on the effect of the highest temperature to the electric power...
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