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This paper investigated raster data's storage and management mechanisms of Oracle 10g spatial, including GeoRester data model, physical storage structure, data block and pyramid strategy. On this basis, the paper demonstrated a typical example of storing and managing raster data. Through a large number of experiments, the paper pointed out that the Oracle's raster data loading tool cannot upload large...
To obtain, understand and evaluate numerous factors of affecting network security with network security situation perception, it can predict the future development tendency, it is a kind of means of analyzing the network security quantitatively, and it is also a fine measurement of network security, studying the situation perception technology has the important meaning. This paper combining visualization...
The network security situation perception technology as active defense technology has become the new research direction of network security field. On the basis of analyzing and summarizing the basic concept and the model of network security situation perception, put forward a method of network security situation perception based on artificial life. This method builds an artificial life model which...
By using 10 groups of training data which were collected through testing a cellphone in order to find the overall functions in it, a size estimation model was built by using Mathematics, a tool to help implement a fitting method for the parameters in COCOMO model. By invoking the FindFit function and using the least square method, the parameters were fixed. With two groups of test data, the size estimation...
Analyzing the current developing status and actual problems of radar system simulation, based on continuous system simulation, combining signal simulation and function simulation, considering current development of simulation technique and the request of air battle to EW, the simulation system of Phased Array radar based on MATLAB/SIMULINK is presented and designed, which conquered the contradiction...
D-S Theory, as the Artificial Intelligence method of uncertainty reasoning, has become the hotspot and difficult point in Artificial Intelligence research area. Especially the inconsistent problem during the conventional D-S Synthesized Algorithm has become the focus of many researchers and scholars. Many new and improved algorithms appeared endlessly afterwards. This paper analyses impact evidences,...
“Sent the correct data to the right place in the right time” is the basic requirement of battlefield data distribution system. The increase of widely distributed combat nodes leads to an increased information exchanges between them which can have very different requirements for data exchange; these nodes are developed with different architecture, programming language or operating systems, which leads...
For achieving the obstacle-avoidance of citrus picking robot and the prevision of obstacle in working scene, the virtual model of fruit tree branch was reconstructed by the binocular stereo vision system in natural scene. In the reconstruction, branch skeleton was extracted and trimmed to remove fake branches after thinning processing; branch's feature points were extracted through multi-segment approximation...
On the basis of comprehensive analysis of existing buy site, it proposes a knowledge library structure of group buying websites, which profit model is based on membership, members' behavior. And providing support to the group buying site decision-making by using data mining technology to analyze the conduct of its members and to predicting further member's behavior. This study is not only extremely...
An air defense decision-making model based on modern artificial intelligence technology is introduced in this paper. It also solve many difficult problems during model establishing, such as design of neural network structure, network propagation algorithm, fuzzy control algorithm and data reduction algorithm. Simulation experiment with typical battlefield situation data is conducted. First, quantify...
In order to detect the intrusion in the system, the information fusion technology was applied into intrusion detection. First, the audit data based on host and network data based on net were trained all together by using SVM and classification were realized. Then the D-S evidence theory was adopted to complete decision fusion. The performance of intrusion detection system is improved greatly, false...
In this paper, flight faults are generated and visual aircraft instruments are created as well as real-time information communication between simulation flight data and virtual instruments is established. Particularly, dynamical faults generation and its corresponding display system are developed and simulated in detail. Finally, the system is validated for authenticity and reliability by taking the...
Analyzing the problem and key technology about integration of heterogeneity database, a distributed database integration model with global schema based on multi-agent technology is put forward. Firstly, DDB global schema and fragment and assign schema is designed according to actual instance of production organization. Secondly, multi-agent system of administration architecture is designed. Thirdly,...
Using the WRF model and NCEP data, a typical winter sea-land breeze progress in China tropical island was simulated, analyzing the impact of wind field simulation with the horizontal resolution, analog range, nesting level, and analog time. The results showed: the simulate effects of the WRF model could not always keep step with the increase of horizontal resolution. Obviously there was a threshold...
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