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Aiming at the problem that some products show no failure in the random truncation test period, the mean rank order method is introduced to determine the sequence number of failure time and the method of approximate median order is used to calculate the empirical cumulative distribution function. To solve the poser that model of failure distribution of the same batch of data is not the single one,...
In order to meet the demand of harmonic current detection and compensation of active power filter in power system of oil production platform. The paper proposes the harmonic current detection method based on the Wavelet Transformation so that it can analyze any harmonic well. the simulation and experiment show that this detection method has the double resolutions in the both time & frequency domains,...
Ultra high frequency partial discharge detection method has advantages in interference immunity and detection sensitivity, and this paper aims to design online partial discharge monitoring system including ultra-high frequency sensors, data acquisition system and software system design for operating 126kV gas insulated switchgear. In the experiment, a chamber of 126kV GIS is selected as the solid...
The strong limit theorem is one of the central questions for studying in the International Probability theory. In this paper, some strong limit theorems for Markov chains on a special non-homogeneous tree were obtained by constructing a non-negative martingale and using Doob's martingale convergence theorem.
The strong deviation theorem is one of the central questions for studying in the international Probability theory. In this paper, Many strong deviation theorems for Markov chains on a non-homogeneous tree are obtained by constructing a nonnegative super martingale and using Doob's martingale convergence theorem.
This article analyzes the principle of three-phase parallel active power filter and the detection method of harmonic. Then it introduces the main circuit of active power filter and the core control system of TMS320F2812 DSP and gives one kind of control policies to realize the entire compensation of reactive power and harmonic by the instantaneous power theory. The theoretical analysis and experimental...
An inertial navigation system/satellite based augmentation system (INS/SBAS) hybridization model has been built to analyze the performance of the system, using Kalman filter to estimate the system errors and calibrate the INS errors. Comparison was made between the original INS position data obtained from a flight test and the hybridized position data. Figures obtained from hybridization simulation...
A fuzzy Petri-net based system for aircraft approach sequencing has been analyzed and simulated. Using flight data from busy airport,consider several main factors which influence the sequencing of the aircraft in terminal area, model and algorithm of this dynamic sequencing system based on fuzzy Petri net have been proposed and analyzed, optimized sequencing result has been given out. Through the...
In this paper, we analyzed calibration method and fault detection & isolation method for gyro errors. A six sensors configuration redundant inertial measurement unit (IMU) is used for simulation. The gyro's error characters have been considered, equations to estimate the error coefficients have been formulated and validated using data got from turntable test, the fault detection & isolation...
Useful methods of aircraft communication addressing and reporting system (ACARS) downlink message identification and relevant application software are presented in this paper. Two methods are introduced for identification of different parts of the downlink message, one is fixed format method for the common parts and the other is modular format method for text field identification. Using these message...
The numerical differentiation is a typical inverse problem, it is known to be ill-posed in the sense of Hadamard that small perturbations in the function to be differentiated may lead to large errors in the computed derivative. Based on continuous regularization theory, this paper discusses some theoretic and technical problems of applying the discrete regularization method to do the problem of numerical...
The paper introduces health into a representative agent's preference who cares about her social status, and based on this new preference structure, we have reached a closed-form solution to the agent's optimal consumption-portfolio question. Consistent with the expectation, the optimal ratio of the risky asset the agent holds is influenced by the covariance of the return of the risky asset and health...
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