The paper presents a limit analysis of psychophyslcal methods which is designed for the changes in visual perception of when visual stimulus appear alternately. The purpose of this experiment is to reveal the quantizi...
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ISBN:
(纸本)9781467391955
The paper presents a limit analysis of psychophyslcal methods which is designed for the changes in visual perception of when visual stimulus appear alternately. The purpose of this experiment is to reveal the quantizing relationship between stimulate and feeling response. Meanwhile, we studied the perception of image on visual information considering the color psychological attributes to clarify the changes of visual perception when image information presented by limit analysis approach. Based on the psychological scale, the test images were divided into three types using psychophyslcal analysis. The test results of psychophyslcal methods also were validated, focusing the verifications on the correctness of the main image date behind the limit analysis. The images data is derived from entropy, moment of inertia, local balance, and correlation. Both the two kinds of analysis arrived at the same conclusion, which turned out that the image perception happens in emotional process and depends upon the psychophyslcal property and signal superposition response.
As it is difficult to get an accurate mathematical noise model under various dynamic interference conditions,Strap-down Inertial Navigation system(SINS) was difficult to realize *** the fuzzy adaptive Kalman filter ca...
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ISBN:
(纸本)9781467383196
As it is difficult to get an accurate mathematical noise model under various dynamic interference conditions,Strap-down Inertial Navigation system(SINS) was difficult to realize *** the fuzzy adaptive Kalman filter can be used to realize the SINS self-alignment,the algorithm complexity is high and the error term is *** solve this problem,a novel self-alignment method using real-time adaptive filter was developed in this *** method is based on the theory of fuzzy adaptive adjustment and used the filter stability as the *** exponential function was used to replace the fuzzy inference calculation,which eliminated the complex process of fuzzy,fuzzy inference and *** stability and accuracy of the adaptive filter was also ***,the simulation process was used to test the algorithm of this method,and the results demonstrated that the self-alignment using real-time adaptive filter method reduced the complexity of the algorithm and had better stability and alignment accuracy.
With the development of rectification technology and DC equipment, hybrid DC-AC transmission has arisen in the distribution network. In addition, the penetration of distributed generation(DG) in the distribution netwo...
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With the development of rectification technology and DC equipment, hybrid DC-AC transmission has arisen in the distribution network. In addition, the penetration of distributed generation(DG) in the distribution network makes the analysis of power system more complicated. As a key measure of grid programming and operating, a practical power flow method of DC-AC distribution network is urgent to study. Firstly, the mathematical model of DGs is given in this paper, and the analysis of the operation and control mode of DC-AC distribution system with voltage source converter(VSC) is conducted. Then a calculation method of hybrid DC-AC distribution system with DGs is proposed, in which constant-power DG, voltage controlled DG and DG with voltage static characteristic is concerned. An improved forward backward sweep method is given, concerning VSC, AC circuits, DC circuits and various type of DGs, which achieves the purpose of unified DC-AC power flow calculation. Finally, case study for a 90-node distribution network with DG integration is conducted to demonstrate the effectiveness of the method.
In this paper,the weak signal detection under a stable noise is investigated based on bistable vibrational resonance(VR) which is driven by a high frequency *** the one hand,the energy of the high frequency drive sign...
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ISBN:
(纸本)9781509009107
In this paper,the weak signal detection under a stable noise is investigated based on bistable vibrational resonance(VR) which is driven by a high frequency *** the one hand,the energy of the high frequency drive signal is transferred to the low frequency weak signal when VR occurs;on the other hand,the control of stochastic resonance(SR) is achieved based on VR,which transfers more noise energy into useful signal *** addition,considering the requirements of real-time detection,the amplitude and frequency of the high frequency drive signal are optimized by the knowledge-based particle swarm optimization(KPSO),which takes the mean signal-noise-ratio(MSNR) of output as the fitness function,and the property that VR system produces the best resonance effect just when the valid system parameter a(B,Ω) is greater than zero as ***,the parameter compensation is combined to achieve multi-high frequency weak signals detection with a stable ***,the method is applied to the vibration fault diagnosis of a mono-crystalline silicon furnace,and the experiment results show the effectiveness and practicability of the method.
[1] proposed a novel analysis and forecast method of electricity business expansion based on Seasonal Adjustment, we extend this work to include the effect the micro and macro aspects, respectively. From micro aspect,...
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[1] proposed a novel analysis and forecast method of electricity business expansion based on Seasonal Adjustment, we extend this work to include the effect the micro and macro aspects, respectively. From micro aspect, we introduce the concept of load factor to forecast the stable value of electricity consumption of single new consumer after the installation of new capacity of the high-voltage transformer. From macro aspects, considering the growth of business expanding is also stimulated by the growth of electricity sales, it is necessary to analyse the antecedent relationship between business expanding and electricity sales. First, forecast electricity consumption of customer group and release rules of expanding capacity, respectively. Second, contrast the degree of fitting and prediction accuracy to find out the antecedence relationship and analyse the reason. Also, it can be used as a contrast to observe the influence of customer group in different ranges on the prediction precision. Finally, Simulation results indicate that the proposed method is accurate to help determine the value of expanding capacity and electricity consumption.
With the rapid development of computer network, multimedia technology has gradually spread throughout all aspects of people's life. This article, based on the concept and characteristics of multimedia, expounds th...
With the rapid development of computer network, multimedia technology has gradually spread throughout all aspects of people's life. This article, based on the concept and characteristics of multimedia, expounds the application of multimedia technology and the trend of future development. It makes a heavy analysis of multimedia teaching and analyses the meaning and advantage of multimedia teaching.
Hybrid state estimation has become a significant tool to utilize PMU measurements in modern power dispatch center. Factors affecting estimation accuracy are discussed in this paper, including measurement number, PMU n...
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The paper presents a limit analysis of psychophysical methods which is designed for the changes in visual perception of when visual stimulus appear alternately. The purpose of this experiment is to reveal the quantizi...
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Multi-components electrical equipment has multiple failure modes. In the context of condition-based maintenance, it is inefficient if executing maintenance for a particular failure mode. Based on analysis of economic ...
Multi-components electrical equipment has multiple failure modes. In the context of condition-based maintenance, it is inefficient if executing maintenance for a particular failure mode. Based on analysis of economic independence, opportunistic maintenance is a special preventive maintenance which can coordinate different maintenance for multiple failure mode. Furthermore, steady availability of equipment was quantified with inspection frequency and opportunistic maintenance strategy. Finally, maximizing steady availability of equipment with inspection frequency constraints to construct model. Feasibility and validity of the model are investigated through case study.
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