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In this paper, a new Krein space approach to robust filtering for linear systems with multiple uncertainties is developed. The multiple uncertainties satisfy the energy-type constraints, entering into both state and measurement equations. The proposed approach is used to tackle the sub-optimization problem arising from a sum quadratic constraint (SQC) of system uncertainties. To this end, a novel...
This paper describes a parallel test method based on a cross-point switch which can be programmed to control signal path and the number of switches to be opened according to the number of channels to be tested. In this method, at the transmitting side, one source inputted cross-point switch can be fan-out to multi sources to activate device under test, and different signal trace or length of cables...
Given a pair of images, a stereoscopic display should execute the image plane calibration, the depth map estimation, and the multiple views rendering to show a 3-D picture. Among all signal processing stages, the depth estimation is the most critical one. This paper presents a real-time depth map estimation algorithm as well as parallel software architecture based on a GPU processor. The experimental...
A scheme is presented for amplifying weak Stokes signals from sea water with different salinities and temperatures by Brillouin amplification. CS2 whose Brillouin shift is near to that of water's is chosen as amplifier medium. A frequency doubled Nd:YAG laser is used to produce singlemode pulses of 7.2-ns duration. Results show that weak Stokes signals arising from water in the temperature range of...
This paper describes an approach for extracting words, textlines and text blocks by analyzing the spatial configuration of connected domain and word contour rectangles on a given document image. The basic idea is that connected components of black pixels and contours can be used as computational units in document image analysis. In this paper, we try to find a spatial feature and overlapped relationships...
Regarding the problem of the Autonomous Underwater Vehicle (AUV) departing from the mother ship and starting up, this paper proposed a divided difference filter (DDF) basing on the Stirling interpolation formula. When AUV separated from the mother ship and restarted, the coarse alignment was not ideal. Its level misalignment error precision was high, but its heading misalignment error precision was...
This study proposes a novel application of MAS (Multi-agent System) framework for edge detection, which the edge definition is derived from the compositive behavior of the gradients of different sample distance. The edge feature can be regarded as an extension of traditional gradient-based methods by the product of gradient magnitude on different distance. And then MAS is employed to obtain the maximal...
An improved adaptive extended Kalman filtering algorithm is proposed here to estimate the measurement noise on-line for the SINS/GPS integrated navigation systems. The measurement remnant chi-square method is used to automatically adjust the sliding window basing on the innovation sequence. The experiment result shows that this new approach could improve the accuracy of the integrated navigation system...
A seamless changing method for AUV integrated navigation system was proposed considering the SINS/DVL and Compass/DVL integrated navigation method have their own advantage for linear motion and curvilinear motion. Bearing consistent check combining with the measure remnant method was discussed as the maneuver checking method, and the adaptive Kalman filter was used by SINS/DVL integrated navigation...
With the voltage decreasing in power distribution network (PDN) in system-on-packages (SOPs), power integrity will be a critical issue. The cavity resonance modes between power and ground planes can be excited by simultaneous switching noise (SSN) or ground bounce noise (GBN) [1], [2]. To cut down the noise from susceptible devices, isolation techniques are necessary. In this paper, two novel structures...
It is difficult to recognise acoustic emission (AE) signal because of serious pollution by noise. Fractal dimension is a new method to describe the characteristics of AE signal. According to the complex computation and low precision of box counting dimension, correlation dimension and Katz dimension, an algorithm of logarithmic fractal dimension based on waveform length was proposed in this paper...
The new method for discrete fractional cosine transform is proposed, and it was introduced in acoustic emission signal enhancement. According to the characteristic of rub-impact acoustic emission (AE) signal from rotating machinery, two constructions are proposed to enhance AE signal, which based on three cycles discrete fractional cosine transform (FDCT3), and modified transform (MFDCT3). The experiment...
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