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Evapotranspiration is a key factor in regional hydrological processes and water resources management. Long‐term variation of evapotranspiration affects the regional climate wet/dry tendency and agricultural production profoundly. Thus, reference evapotranspiration (ET0) values for 46 meteorological stations in the Yangtze River Delta (YRD) were calculated for 1957–2014 using the FAO‐Penman–Monteith...
The article analyses current situation and some critical problems in railway materials purchasing. In order to improve the management, a purchasing management Strategy model about grading and classifying railway materials is proposed. The model is based on material grouping method and provides basis for decisions about key problems such as how to divide the purchasing management authority, how to...
As concerning the problems of intelligent construction existed in the decision support system (DSS) model, one construction plan and one system structure of intelligent construction of DSS model based on integration of neural network (NN) and expert system (ES) are presented. On the basis of separating the literal description and the data description, ES was applied to select the model type. On the...
The differences in development elements lead to spatial disparities of regional economic development. The study, using principal component analysis and spatial autocorrelation method, has found that the economic development in Chongqing was featured with strong positive spatial autocorrelation. The positive spatial autocorrelation appears in two forms named "HH" type and “LL" type....
Existing network damage assessment method fall short because they either lack correlation adjustment among indexes or without conclusive evidence to demonstrated the degree does represent the real situation of the network. This paper proposed a method to adjustment index correlation based on Orthogonalization. The advantages of this method for evaluation damage degree of network have been demonstrated...
In this paper, the problem of image fragment reassembly has been researched. The multipurpose use of the shape and texture features of fragment is introduced, and a new approach is proposed for a type of specific fragment, polygon image fragment. Since polygon image fragment has a characteristic that it has obvious corners, this approach takes advantage of such characteristic, and detects the corners...
Endpoint Detection is the process of cutting the signal into pieces according to its syllables or identifying the important part of a speech segment for further processing, which is a significant part in speech recognition. Recognition accuracy and robustness of the traditional methods for example, the short-time energy spectral and Zero-pass Ratio analysis will decrease sharply with the Signal-to-Noise-Ratio...
The polygon image fragment is a special fragment type, whose sides is composed of straight line segment, and it has seldom been researched. In this paper, a new image fragment reassembly methodology based on corner detection and gray correlation is proposed for polygon fragments. The experimentation indicates the reassembly methodology based on corner detection and gray correlation can get good result,...
A new general methodology is introduced for computer-aided reassembly of the polygon image fragments. Since polygon image fragment has a characteristic that it has obvious corners, this methodology takes advantage of such characteristic, and detects the corners by Hough transform and fuzzy reasoning. Meanwhile, it computes the length of each side, compares the side length, finds out the sides with...
The m-Sequences have been widely used in many areas such as telecommunication, cryptology, navigation and radar. Due to the difficulties of constructing the feedback functions of M-sequences, a new method of constructing one class M-sequence and its feedback function were presented. A sub-function Y was formed by remodeling the M root-sequence states diagram. To affix sub-function y to the feedback...
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