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Waveforms with low autocorrelation sidelobes are favorable to weak target detection and synthetic aperture radar (SAR) imaging. In this paper, we aim at solving the problem of designing waveforms with low autocorrelation sidelobes at specified intervals. Thus an amplitude optimization method (AOM) is proposed to minimize the weighted integrated sidelobe level (WISL) of the autocorrelation. By regarding...
Reducing the correlation level lies at the core of the waveform design for multiple-input multiple-output (MIMO) radar system. In this paper, a new approach to the design of waveform for MIMO radar is proposed. The multiple pulse train coding is employed and the compression accumulation is introduced. In this manner, the waveform correlation can be almost eliminated and the optimal compression accumulation...
A new method for designing transmitted sequence and receive filter in the signal-dependent clutter and signal-independent interference environment is proposed. The mean-square error of point-like target scattering coefficient estimates is considered as the measurement of the radar system. Both the finite energy constraint and the similarity constraint are enforced for controlling certain characteristics...
Online service systems have been increasingly popular and important nowadays. Reducing the MTTR (Mean Time to Restore) of a service remains one of the most important steps to assure the user-perceived availability of the service. To reduce the MTTR, a common practice is to restore the service by identifying and applying an appropriate healing action. In this paper, we present an automated mining-based...
The article concluded the concentrations of SF6 byproducts in 74 220 kV and 500 kV GIS transformer substation (3770 gas chambers in total) in Guangdong Province. The concentrations of carbon dioxide (CO2), CF4, thionyl sulfide (SOF2), sulfuryl fluoride (SO2F2), disulfuryl decafluoride (S2OF10), SO2 and sulfureted hydrogen (H2S) were in partial normal distribution.
Time delay estimation (TDE) plays an important role in multi-sensor signal processing. Its accuracy and precision are of critical significance. In this paper we propose a robust subsample time delay estimation approach which is based on an improved GCC PHAT algorithm and a sinc-fitted model. Computer simulations clearly demonstrate that this method achieves good results in noisy environments.
This paper establishes evaluation model of carrying capacity of regional groundwater resources by method of matter-element analysis, and by this method, it carries on the comprehensive evaluation to carrying capacity of regional groundwater resources in Gannan. According to the evaluation result, carrying capacity of groundwater resources in Ganna test area belongs to the degree of I, which means...
Based on the measured sample data, geostatistics and geographic information system were utilized to analyze the spatial variability of six soil nutrients variables of reclaimed wetland in Sanjiang Plain. All soil nutrients studied had spatial autocorrelation in some extent, and kriging could successfully interpolate these variables. Thus, the combined method could accurately evaluate the spatial variability...
Disordered voice database is very useful for analyzing, evaluating patients' disease conditions. According to pathological conditions of patients and characteristics of Mandarin speech, our database is composed of sustained vowel, words, sentences and poetry. The sustained vowel part contains the most common used six vowels in Mandarin speech. The words part contains ten simple words. The sentences...
Sustained vowel analysis is an important method in disordered voice evaluation. Conventional method generally depends on pitch detection, which may be invalid in hoarse or seriously disordered vowel samples analysis. In our vowel analysis, correlogram and cross-channel correlation in auditory model are proposed as a robust and accurate criterion. Instead of manual selection, a method of selecting...
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