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There has been a constant barrage of worms over the internet during the recent past. In order to develop appropriate tools for thwarting quick spread of worms, researchers are trying to understand the behavior of the worm propagation with the aid of epidemiological models. In this study, A SIQRS (susceptible-infected-quarantined-removed-susceptible) model with nonlinear incidence rate for the worm...
This paper has presented a numerical algorithm for reconstructing CT TF models of systems with pure integrators from their ZOH DT equivalents. The algorithm used basic recursion and simple polynomial manipulations and is well suited for CACSD software. The algorithm performs the reconstruction solely in the frequency-domain; hence avoids intermediate unnecessary steps of realizing the TF in SS and...
The paper introduces the graphic technology in ocean environment visual simulation. The simulation model of entity object, climate in sky, sea natural environment were described in detail. These models can simulate ocean environment in real-time and generate realistic scene. And the illumination model, LOD model and multilevel texture mapping were researched to improve the rendering efficiency. The...
As to the research on AspectJ in this context, after analyzing the Java program, AspectJ can realize the capture of the join points based on the Boolean or Compound expression in the Java program. The information includes: the time to judge the runtime condition of each join point as “true” use of the logic AND (&&) to combine pointcuts; and use of the logic OR (‖) to combine pointcuts; all...
Acording to the theory of fraunhofer diffraction, the silt-diffraction processes is simulated based on labview which has powerful function. First, the change of the single slit-diffraction intensity can be observed when the wavelength of light, slot width and focal length are adjusted. Secondly, the simulation can be used for the process of theoretical teaching beacause the application of the simulation...
The complete stress-strain curve of rock is the mechanical property data which is used widely and the most elementary and important. But the material of rock is of special complex natural structure. It is very hard to obtain the complete and true performance data of rock by the common material tester which causes rock broken easily. This paper studies the rock mechanics tester intelligently controlled...
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...
This work presents a robust method for realtime segmentation and tracking of moving objects using depth image sequences, which is insensitive to illumination changes. We propose a novel criterion in our quadtree split-and-merge framework and effectively solves the problem of segmenting objects in complex and cluttered scenes. We also introduce a plane estimation algorithm to cope with the indistinction...
Computers have been used in many fields, for example, design, fabrication and installation of the offshore oil and gas exploration and production structures. As computer processor and memory have been rapidly developed in the past decades, computers have been used much more widely. This paper will mainly discuss the computer application in Offshore Engineering. Because of the particularity of Steel...
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,...
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...
Combined with the one-dimensional isentropic flow theory, method of CFD is used to simulate the whole flow field of a certain convergent-divergent nozzle under the typical operation. The paper describes the gird generation, boundary conditions determination, flow field initialization as well as RNG k-e turbulence model application, and analyzes the nozzle aerodynamic characteristics. Studies have...
Most traditional researches on inventory management mainly focused on inventory management of individual enterprises, especially on the algorithm analysis. This paper analyze the characteristics of the supply chain inventory management system, and then build three system dynamics models: the supplier supply chain inventory management system, the manufacturer supply chain inventory management system...
Cloud computing is a new trend to provide computing capacity and data storage in a pay-as-you-go model across Internet. Data management is a challenging task in cloud computing. In this paper we surveyed the state of the art of data management in cloud computing, discussed the issue about balance between consistency and scalability cloud data management and presented a feasible solution. We also highlighted...
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,...
In view of the object in the image pixels and edge pixel to pixel adhesion, adhesion components due to the occurrence of the pixel gray mixed pixels, resulting in minimal differences, the traditional edge detection algorithm based on gray level because they can't distinguish adhesion part gray difference, cannot complete image edge detection problem. The image edge segmentation algorithm based on...
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