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With the promotion of the electroporation therapy clinical application, how to design an electrode with a lower voltage level and distribution and high intensity electric field in order to achieve the optimal treatment of tumors. In this paper, FEMLAB finite element analysis software is used for the needle electrodes in biological tissue electroporation for electric field simulation, the simulation...
For aerial photography, the forward overlap and side overlap of any point in the photographic image are dependent on its height difference to fiducial altitude of the flight block. The hypsography should be taken as the primary factor into consideration in the flight plan of aerial photography, especially in the process of auto-planning by computer. However, many softwares used for flight planning...
An input and output states based responding ship motion nonlinear mathematical model is presented. Compared with state space model, the responding ship model costs less computation and preserves the nonlinear effect in the deduced differential equation. According to the ship relative parameters and trial voyage data, the mathematical model of the fifth generation 5446TEU container ships is constructed...
The simulation of the engine model and the control system were researched on in this paper. The model of the main parts of the four-stroke engine were built, the PID controller, integral separation PID controller and anti-saturated PID controller were designed for the velocity. Visual C++ is used for the model simulation and the controllerspsila design. The velocity control results of different controllers...
A distributed ship steering control algorithm testing simulation system based on virtual reality is proposed and developed. This system can test both ship course control and track control algorithm, with simulation process displayed by distributed virtual reality technique. In the paper, the configuration of the simulation system and the ship steering mathematical model are presented, main functions...
At present, most of marine engine room simulators (MERS) in the world are based on networking technology. But such MERS needs much money and large space to install and use. So it can not meet the demand of the training individually in spare time for the crew. So a simulation system of a PC-Based marine diesel engine has been proposed. In this paper, a quasi steady state model of a large low-speed...
Single neuron PID (SNPID) adaptive control based on wavelet neural network (WNN) nonlinear identification for ship fin stabilizer system is presented in the paper. The SNPID adaptive controller is adopted to carry out feedback control, and assure the stability of closed loop system and restrain the disturbances. The WNN is used to identify the model of plant and adjust the parameters of SNPID. The...
In cognitive radio networks, cooperative spectrum sensing is used to improve the performance of spectrum sensing. However, the limit of control channel bandwidth and the delay of sensing will more impact the spectrum sensing performance when the number of cognitive user becomes very large. In order to solve this problem, censor-based cooperative spectrum sensing scheme is presented to reduce communication...
This paper proposes a novel fuzzy control algorithm aiming at the dynamic decoupling of the Halbach array permanent magnet spherical motor (HPMSM). Computed torque method (CTM) is applied to the dynamic model of the HPMSM. Due to the estimating errors of the parameters, which are recognized as structured uncertainties, the model errors can not be eliminated in practice. Moreover, the external disturbances,...
The ldquosemantic gaprdquo observed in content-based image retrieval (CBIR) has become a highly active research topic in last twenty years, and it is widely accepted that domain specification is one of the most effective methods of addressing this problem. However, along with the challenge of making a CBIR system specific to a particular domain comes the challenge of making those features object dependent...
Based on integrated control for underactuated ship linear track keeping and main diesel engine, A new integrated control arithmetic designed by the linear parameter varying (LPV) system control theory and the closed system poles assigned via state feedback is proposed. The ship motion equations of the MMG model is translated into LPV systems with ship speed as the scheduling parameter. The main engine...
Based on input and output states, a construction method of the responding ship motion nonlinear mathematical model is presented. Comparing with state space model, the computation of responding ship model is simple, and the differential equation obtained can preserve the nonlinear effect. Then the mathematical model of the 5446TEU container ship is constructed according to its relative parameters and...
Because the ship steering control is uncertain, nonlinear and time-varying. A predictive control algorithm based on RBF neural network is adopted to the ship steering control. Recursive k-means clustering algorithm and recursive least squares algorithm are used to adjust the RBF neural network. And clonal selection algorithm is used in predictive control algorithm to ensure the global optimal solution...
Based on Focus 400 ASIC truescale image processing chip, a PC to TV scan converter with high resolution is developed in the paper. The video format conversion principle and the function struture of FS400 chip are discussed. The video convertor systemic design of hardware and software structure is proposed, and its function and operation process is given. Applying the proposed convertor in a video...
A Halbach array permanent magnet spherical motor (HPMSM) can provide 3 degrees-of-freedom motion in a single joint, simplify the mechanical structure greatly, improve the positioning precision and response speed. However, a HPMSM is a multivariable, nonlinear and strong coupling system with serious inter-axis nonlinear coupling. The dynamic model of a HPMSM is described in this paper, and a control...
In recent 20 years, artificial neural network has attained amazing achievement in very wide fields, and artificial neuron models are the bases of the success. This article classifies presented researches on artificial neuron models in China to 7 types and reviews them. Furthermore, the future research directs were prospected.
Aiming to the control feature of large delay system like ships, designing a 2-rank derivative multi-step neural network predictive model and the algorithm, and presenting a fuzzy control scheme based on the model with PID neural network and fuzzy CMAC controller, we solve the problems of model online identification and controller online design in traditional adaptive control, so that the high precision...
Verifying output pulse errors and upsets of an inertial measurement unit (IMU) in harsh electromagnetic environment (EME) is a key issue for inertial navigation and guidance system accurately measuring attitude angular rates and apparent accelerations of flight vehicle. This paper deals with an amount of laboratory tests on the IMU in a harsh EME, and performs a statistical analysis with the measured...
Combined CMAC addressing schemes with fuzzy logic idea, a general fuzzy CMAC (GFAC) is proposed, in which the fuzzy membership functions are utilized as the receptive field functions. The mapping of receptive field functions, the selection law of membership function and the learning algorithm are presented. Recursive least-squares temporal difference algorithm (RLS-TD) is deduced, which can use data...
In this paper, the concept of enterprise information portal and of the enterprise application Integration is introduced, and then the relationship between enterprise information portal and enterprise application integration is discussed. The importance of enterprise application integration as a supporting environment during the constructions of an enterprise information portal is analyzed in detail,...
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