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In this paper using BP neural network as core algorithm, Java and MATLAB as development tools, build a fault intelligent analysis system of electric energy data acquire network which have machine self-learning ability. This diagnosis system adopts the model of cloud computing in structure, artificial intelligence calculation in the cloud, friendly humancomputer interaction at the front-end. Lab simulation...
In order to solve the problems which existing in the software program management and control of the electric energy data acquire terminal. In this paper a method of software comparison based on MD5 algorithm is proposed. By adding MD5 algorithm to the terminal program. The measured terminal executes the instruction by the software comparison system and generated MD5 value, by comparing the MD5 value...
For the resonance phenomenon in LCL filter interconnection interface of photovoltaic grid system, the mechanism of the interconnection node voltage resonance and the reason for resonance frequency changing are analyzed. In this paper, a control method based on virtual harmonic impedance is proposed. The virtual harmonic impedance is composed of virtual resistance and virtual inductance. It shows the...
Impedance model as a novel methodology can analyze clearly the system stability of microgrid caused by the interaction of loads, generators and utilities. This paper summarizes the possible design considerations of impedance-based active stabilizers (IBAS) followed by the summary of the impedance based stability criterion of microgrid. IBASs of AC microgrids are classified according to the location...
in this paper, we address the problem of tracking drift and failure due to background clustering, illumination and scale changes. To resolve these problems, we propose an efficient model that project original RGB color space to a more robust color space—Color Names feature space. Furthermore, we represent objects by background weighted histograms, and thus suppress the similar background around. Moreover,...
Attribute reduction based on discernibility matrix is one of the important issues in rough set theory. It is also vital to study attribute reduction based on general binary relations. In this paper, the concept of neighborhood-assignment consistent set of attribute reduction based on binary relations is first presented and some of its main properties are discussed. Then, a new attribute reduction...
In islanding microgrid, the impact of line impedance on the proportional power sharing cannot be neglected if multi-inverters are operated to form a microgrid. In this paper, an improved droop controller is proposed to reduce the unexpected dynamic and steady power sharing errors caused by the mismatching of line impedance. With this proposed combined compensation, the power quality, the dynamic and...
An approach of fault-tolerant control for sensor fault of reconfigurable manipulator based on sliding mode observer and decentralized adaptive fuzzy is proposed. The dimension of original system is extended by introducing a first order filter such that sensor fault is equated to actuator fault. The sliding mode observer is designed for the new system which coupling interconnection terms of the joints...
This paper mainly investigates the effect of system size on collective behavior in a synthetic multicellular system, where individual oscillators are a combination of repressilator and hysteresis-based oscillators and are coupled through a quorum-sensing mechanism. By bifurcation analysis and numerical simulation we find that the increase in cell number can change the size of the stability interval...
In order to decrease the number of misclassification of attacks, the application of data mining technology on the intrusion detection was studied in depth. Firstly, the study background was introduced, and then the basic theory of intrusion detection system was analyzed, and then the basic theory of data mining technology was discussed and the mode of data mining was established, and the algorithm...
The non-dispatchable energy output of PV generators has an adverse effect on the stability of microgrid especially capacity-limited microgrid with high PV penetration. To solve this problem, a unified power control strategy for PV generators is proposed to mimic the performance of synchronous generator (SG) in power system. As a supplementary supply, fuel cell is equipped in the PV generator to reduce...
Inverters with distributed storage(DS) play a very important role in a microgrid. A new kind of inverter called virtual synchronous generator(VSG) is proposed in this paper to emulate the behavior of synchronous generator(SG) in the utility. The core algorithm of VSG is to employ an electromechanical transient mathematic model of round SG. There are two important operation modes in microgrid: active...
The resonator simulator provides a new method for researching the resonant sensor closed-loop circuit. In this paper, the mathematic model of silicon pressure resonator is established to design the circuit with resonator characteristic. Firstly the relation between pressure and the amplitude-frequency characteristic of the resonant beam is deduced. Secondly, combined with the in-out of excitation...
Schisandra Chinensis is a traditional Chinese medicine. The effects of dried schisandra impact the medicinal value and economic benefit of schisandra directly. Presently, studies on the characteristics and uses of schisandra chinensis are reported frequently in China. However, the studies of factors on the influencing drying effect of schisanda chinensis have not been reported. In this paper, the...
There are many problems in the layout of the railway freight stations, such as too many stations, the higher density of stations, and so on. So, it is necessary to adjust the layout of freight station and integrate the freight transport resources to raise the freight transport services level. According to the Sugarscape model and the analysis of advantages and disadvantages of Human Element model,...
An optimization model of China railway freight station layout based on agent and human-element-model has been put forward to solve the problems that have hindered the normal product, such as too many railway freight stations and too clear distance between stations, and so on. The model uses the classical Sugars cape as the reference and integrates the intelligence of Agent and the combination of subjectivity...
According to the property that the human visual system has different sensitivities in the frequency domain, a novel image quality assessment algorithm based on Structural Similarity (SSIM) and DCT is proposed. The method takes frequency information as a part of structural information and gets the frequency structural comparison function by weighting the frequency components based on the importance...
Laser protection materials based on linear effect are only sensitive to optical wavelength, which are protection materials against optical wavelength, while laser protection materials based on nonlinear principle and phase transition effect are the protection materials against optical intensity, which can overcome the defects of linear protection materials, and are expected to realize multi-wavelength...
China has entered the 3G era, this paper introduces the concept and function of 3G technology, analysis the characteristics of mobile learning. 3G technology has rich characteristics, which can be used for M-learning. When the 3G technology are applied in mobile learning, mobile learning will have new identities.
Biologically inspired image/signal processing like the intersecting cortical model (ICM) and mathematic morphology is described. Under certain operations, the parallel pulse transmission characteristic of ICM in image processing is equal to the erosion/dilation operation of binary mathematic morphology. Granulometry, binary image thinning, edge detection and hole filtering algorithms based on ICM...
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