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Stored data needs to be protected against device failure and irrecoverable sector read errors, yet doing so at exabyte scale can be challenging because of the large number of failures that must be handled. We have developed and presented RESAR (Robust, Efficient, Scalable, Autonomous, Reliable) storage, an approach to storage system redundancy that only uses XOR-based parity and employs a graph to...
The performance of adaptive beamformer will degrade in the case of jammer motion and shaking platform. In order to improve the performance of adaptive beamformer, an improved null broadening adaptive beamforming method is proposed. The proposed method is realized by the reconstruction of interference-plus-noise covariance matrix. Null broadening can be obtained by the proposed method and the null...
The traffic volumes between a set of Origins and Destinations (OD) pairs within a network become increasingly critical for network operations management, planning, provisioning and traffic engineering. However, in practice it is challenging to reliably measure traffic in the whole network. For example, because of flaws in the measurement systems and attacks launched in a network, missing data and...
In order to improve the efficiency of soybean genetic variation information, robust relationship inference in GWAS parallel algorithm is raised in this paper. This algorithm is adopted serial and parallel hybrid structure. Each row of data is parallel processed by OpenMP technique. The I/O processing and the accumulate processing are treated as a serial. Finally, the serial and parallel algorithms...
Ocean ambient noise mainly includes uncorrelated noise and correlated noise. The uncorrelated noise only affects the diagonal elements in the noise covariance matrix, and it can be suppressed by subtracting a value on the diagonal elements. Utilizing this feature, a high array-gain beamforming based on diagonal reducing is presented. Meanwhile, the robustness becomes poor. So, the array weight norm...
Robust weak signal detection is quite a difficult problem in the presence of interferences and noise. Generally, adaptive beamforming is an efficient way of interference suppression. However, conventional adaptive beamforming, e.g. MVDR may degrade significantly due to mismatch in the practical applications. In this paper, a robust adaptive interference suppression method is presented and then the...
For USBL (ultra-short baseline) positioning system, orthogonal receiving arrays with three elements distributed in ‘L’-shape or four elements forming a cross are generally used. With this configuration, the accuracy of the localization results depend on the accuracy of the coordinates of array elements, and sometimes the quadrant of the results may be significantly changed. Using redundant data measured...
Competitive advantage of a firm is usually reflected through its superiority in production resources and performance outcomes. In order to achieve high performance (e.g., productivity) and significantly improve product quality, major US industries have promoted and implemented Robust Design (RD) techniques during the last decade. RD is a cost-effective procedure for determining the optimal settings...
A program developed in MATLAB® is presented; the function of this program is to reproduce the music that is contained in a sheet of music. Initially, the program only uses the G- Clef and for the notes only the Semibreve, Minim, Crochet, and Quaver are taken into account. A description of the program function is given, and then the results of the program are analyzed. Finally future work is proposed...
This paper presents a novel space-time adaptive processor with digital beam forming algorithm based on least mean squares (LMS) method. Furthermore, the omnidirectional optimization principle for the algorithm applied in satellite navigation field is introduced. The algorithm minimizes the deviation of the radiation pattern due to the edge effect of asymmetric substrate in the miniaturization design...
We evaluated how magnetic resonance imaging robustness depends on dual-row transmit array geometry, head size, position of a head inside the array and array tuning condition. A clear winner was not found. For overlapped arrays, different tuning conditions resulted in larger peak-to-peak variation for circular polarization excitation, but B1+ (averaged over the volume of interest) decrease was as a...
A biosensor with an alternating current-driven control is realized for label-free detection of biomolecule. This sensor precisely measures the capacitive changes in the electrode-electrolyte interface after hybridization with complementary DNA targets. Conventional capacitive biosensors generally use the excitation method with double current-sources. However these sensors have limitations due to performance-based...
In this work, a Head-Related Transfer Function (HRTF)-based Robust Least-Squares Frequency-Invariant (RLSFI) beamformer design is proposed. The HRTF-based RLSFI beamformer accounts for the influence of a robot's head on the sound field. The performance of the new HRTF-based RLSFI beamformer is evaluated using signal-based measures and word error rates for an off-the-shelf speech recognizer, and is...
Nature abounds with complex patterns emerging from biological, chemical, physical and social systems. Cellular Neural Networks (CNNs) may produce patterns similar to those found in nature, which implies that CNNs may be used as prototypes to describe some systems in nature. The Check-board-Strip CNNs introduced by Chua et al. can generate pattern that check-boards and short single strips coexist from...
Applying fuzzy logic to clustering techniques leads to more robust and autonomous methods like the fuzzy joint points (FJP) which is a density based fuzzy clustering algorithm that requires no parameters to be set. However, a straightforward implementation of the method is rather slow. Recently, a faster but parameter dependent version of the algorithm was proposed and a theoretical bound on the parameter...
The proposed method realizes adaptive reduced-dimension processing based on joint optimization of both reduced-dimension matrix and beam-forming weight vector. Meanwhile, the spatial spectrum reconstruction technology is used to update the covariance matrix of array data online. The simulation results show that the proposed method is robust to the dimension of the reduced-dimension matrix and significantly...
Adaptive beamforming algorithm performance decreases sharply with the increase of array errors. Beamforming algorithm based on diagonal loading is a simple and effective method for improving robustness. But it is difficult to determine the optimal diagonal loading factor, and the fixed load value does not change with the array error, reduce the loading effect. To solve the above problems, this paper...
As the positioning accuracy of GNSS systems will degrade in the presence of electromagnetic interference, jamming detection becomes pivotal part in high-precision wireless communication systems which is conventionally accomplished by energy statistics or time-frequency transformation. In this paper, we present the spatial-frequency adaptive processing (SFAP) method which will achieve highly detecting...
GRCRT(Generalized Robust Chinese Remainder Theorem) allows to reconstruct multiple numbers when all the moduli have a common factor and all residue sets have errors. In this paper, we propose a new approach based on GRCRT to joint estimation of chirp rates, initial frequencies and DOAs (direction of arrivals) for multiple LFM(linear frequency modulation) signals with sub-Nyquist spatial-temporal sampling...
In this paper a robust Audio steganography technique is proposed by randomizing and dynamically changing the embedding sequence. Advance Encryption standards is used for providing additional security and robustness to the algorithm and tested for the 30 speech files. The addition of cryptography in steganography increases the robustness and introduces a higher level of security since the key is required...
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