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Coupled mode theory (CMT) can be traced back to 3 decades ago, and has been an indispensable tool of analyzing and designing waveguides, resonators, couplers or many other devices from microwave frequency to optical frequency [1], in both time and space domain. In the presence of loss and gain, the coupled mode equation on describing the mode hybridization of various waveguides or cavities, or cavities...
Because it is hard to depict real world traces, researchers proposed some mobility models in the study of mobile ad-hoc networks. It is aware recently that some mobility models will lead to non-uniform node distribution, which decreases the credibility and validity of simulations. Many researchers reconsider the node distribution characteristic for random waypoint model and have gotten some valuable...
The underactuated 2-dimensional translational Oscillator with rotational actuator (2DTORA) system consisting of an rotational proof-mass and two unactuated translational carts is an extension version of the TORA system which is a well-known benchmark for nonlinear control design. In this paper, dynamics of 2DTORA system is normalized and written in general affine form. And we apply fuzzy Lyapunov...
While optimizing database performance, parallel query technology can significantly improve the throughput and resource utilization of the database server. Interactions among different queries which run concurrently can have a great impact on system performance. However, conventional optimizing strategies of parallel query often only focus on individual queries rather than their interactions. In order...
For the limitations of vibration signals caused by non-stationary autoregressive (AR) model which can not effectively describe the signal characteristics, it is presented a fault diagnosis based on autoregressive conditional heteroskedasticity (ARCH) model. This method firstly uses ARCH model to fit various fault signals and regard the proceeds of the model parameters as the characteristics of fault...
two manipulators rigidly handling a flexible payload to track a predefined trajectory. The control law provides robustness against model parameters uncertainties and external disturbances. To suppress the elastic vibration, an adaptive optimal controller is designed. Implicit proof of the system stability is provided via Lyapunov Stability Theory. Finally, the cooperating control input is shown through...
Directing at the complex structure, cockamamie production technology and great operation difficulty of vertical roller mill, this paper constructs the fault expert system to guide and optimize the grinding process. First, the expert database is established with fuzzy cluster analysis, principal component analysis (PCA) and tendency analysis. With support vector machine (SVM) regression, the multiple...
Surface modeling algorithms were designed using models including TC-Be??zier, B spline curve with shape parameter, trigonometric B spline curve with shape parameter and hyperbolic polynomial B spline curve. The SMS (Surface Modeling System) was developed, OpenGL as the graph library, in Microsoft Visual C++ 6.0 programming environment. Founded the uniform platform of surface modeling, and realized...
Image inpainting is an important element in image restoration study, whose purpose is to restore the lost information automatically based on existing information. Image inpainting can be used to restore damaged images and videos, remove text and hidden errors on videos, and so on. Although the basic idea of the image inpainting is very simple, many of the image inpainting algorithms are very complex...
To enhance the temperature control accuracy and solve the lag problem of continuously sintering furnace, this paper developed temperature control system based on the analysis of the temperature field, adopted finite element analysis module, and respectively analyzed sintering furnace temperature field influenced by atmosphere, furnace door opening or closing, as well as interaction between sintering...
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