To solve the fault diagnosis problem of liquid propellant rocket engine ground testing bed,a fault diagnosis approach based on self-organizing map(SOM)is *** SOM projects the multidimensional ground testing bed data i...
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To solve the fault diagnosis problem of liquid propellant rocket engine ground testing bed,a fault diagnosis approach based on self-organizing map(SOM)is *** SOM projects the multidimensional ground testing bed data into a two-dimensional *** of the SOM is used to cluster the ground testing bed *** out map of the SOM is divided to several *** region is represented for one fault *** fault mode of testing data is determined according to the region of their labels belonged *** method is evaluated using the testing data of a liquid-propellant rocket engine ground testing bed with sixteen fault *** results show that it is a reliable and effective method for fault diagnosis with good visualization property.
In this study, we design and present the novel wearable system with the interactive posture caption and recognition functions based on the non-vision over the ZigBee wireless sensor network (ZigBee-WSN). There are two...
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In this study, we design and present the novel wearable system with the interactive posture caption and recognition functions based on the non-vision over the ZigBee wireless sensor network (ZigBee-WSN). There are two type sensors, 3-axis accelerometer and clip type, to be employed in our wearable system. These sensors are arranged on user's four limbs such that the posture information can be gathered by them. Then, the posture information is transmitted to the data-controlling center over ZigBee-WSN. Finally, this center can analyze and distinguish various postures by our proposed algorithm through the friend user's interface to express. Our presented wearable system can distinguish out 28 kinds of hand postures and 13 kinds of leg postures altogether. Moreover, under our presented ZigBee-WSN system with small size, low-power consumption, and high-reliability characteristics, the data-controlling center can simultaneously tele-monitor the real-time body interactive postures of 8 persons, when the transmitting distance is less than 18 M and the package correct transmitted rate is more than 97.5%.
The light intensity distribution inside organic solar cells is described by optical propagation matrix and the quantity of effective excitons is defined in this paper. The quantity of effective excitons describes the ...
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ISBN:
(纸本)9781424457977
The light intensity distribution inside organic solar cells is described by optical propagation matrix and the quantity of effective excitons is defined in this paper. The quantity of effective excitons describes the total intensity near the donor/acceptor interface, which can contribute to the generation of holes and electrons. The optimum structure then can be obtained by maximizing this parameter. In this paper, CuPc/Qo structure is taken as an example. It is found the optimum structure is CuPc(15nm)/C6o (4Onm). The verification experiments are established and only 5nm error appears in the thickness of CuPc.
The approximation design problem of linear quadratic composite control for singularly perturbed time-delay system is considered. Based on the slow-fast decomposition theory of singular perturbation, the original optim...
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ISBN:
(纸本)9787894631046
The approximation design problem of linear quadratic composite control for singularly perturbed time-delay system is considered. Based on the slow-fast decomposition theory of singular perturbation, the original optimal control problem is decomposed into a fast subproblem without time-delay and a slow time-delay subproblem. To obtain the numerical solution of optimal control law of the slow subproblem, the two-point boundary value problem is first transformed into a new one formulated by state and delay compensation vectors, and then the shooting method is used to solve the problem. Further, the composite control law of the original problem is obtained. Numerical example is presented to illustrate the effectiveness of the proposed method.
The test vector generation algorithm and the compression algorithm based on general structure model of SOC was introduced in this paper. We have analyzed the PODEM algorithm for test vectors generation and translated ...
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In order to resolve the wrapper optimization and TAM co-optimization issues, this paper presented a new technique based on neural network combined with genetic algorithm to achieve dynamic scheduling test *** result o...
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The valve clearance is essential to the engine efficacy, this paper presents the definition of the valve clearance and selecting fundamental of the valve tappet, and the tappet selector was developed on these grounds,...
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The valve clearance is essential to the engine efficacy, this paper presents the definition of the valve clearance and selecting fundamental of the valve tappet, and the tappet selector was developed on these grounds, which was consisted of the cylinder head measurement machine and camshaft measurement machine;the errors of the tappet selector were analyzed in brief, and the repetition and veracity of the tappet selector were tested, the data shows that the measurement is accurate, the valve clearance could be controlled with the tappet selector.
For improving accuracy of optical flow computation, we propose a new method to compute optical flow from both gray and color information. First, the Gauss filter is used to pre-filter the color image sequence. Then op...
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An analytic model of silicon nanowire (Si-NW) pH sensor is presented. The model is based on the solution of the cylindrical Poisson equation and the nonlinear Poisson-Boltzmann equation in the Si-NW and the electrolyt...
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ISBN:
(纸本)9781424435432
An analytic model of silicon nanowire (Si-NW) pH sensor is presented. The model is based on the solution of the cylindrical Poisson equation and the nonlinear Poisson-Boltzmann equation in the Si-NW and the electrolyte, respectively. The results simulated from the proposed model are compared with experimental data.
To solve the problem of power system reactive optimization efficiently, a new method, which combines particle swarm optimization algorithm with dynamic weight, was presented. The improved PSO algorithm, which is based...
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ISBN:
(纸本)9781846260681
To solve the problem of power system reactive optimization efficiently, a new method, which combines particle swarm optimization algorithm with dynamic weight, was presented. The improved PSO algorithm, which is based on dynamic weight, is simple in application and quick in convergence. The weight is changed in every loop according to the swarm evolution degree and aggregation degree factor, which ensures population diversity and avoids premature convergence effectively. Then the algorithm is applied in reactive optimization of power system, compared with PSO, the optimization result s of IEEE-30-bus show that the algorithm has a good stable searching capacity and good parallel efficiency.
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