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Corner points are formed from two or more edges and edges usually define the boundary between two different objects or parts of the same objects. In this novel we discuss the theory of the Harris corner detection and indicate its disadvantage. Then it proposes an improved algorithm of Harris detection algorithm based on the neighboring point eliminating method. It reduces the time of the detection,...
Swipe fingerprint sensor, which can acquire a series of sequence fingerprint images, is now widely used in order to reduce the cost of fingerprint image acquisition. This paper presented a new method of sequence fingerprint image mosaic. On the cases that fingerprint swipes in a non-uniform speed, the phase-correlation algorithms are mainly applied to calculate the offset of swiping direction, while...
Signal-to-interference ratio (SIR) based selection diversity is efficient technique to mitigate fading and cochannel interference in wireless communication systems. In this paper, performance of dual SIR based selection diversity system, as the least complicated diversity technique, over correlated Rician fading channels is analyzed in the presence of multiple equal power cochannel interferences....
Many organizations are shifting to virtualization of servers to improve operational efficiency and reduce capital expenditures. Virtualization helps consolidate servers, improve hardware utilization and reduce the consumption of power and physical space in the data center. However, the problem of tuning dynamic resource allocation is a novelty. Managing heterogeneous workloads running within virtual...
The matrix representations of aperiodic auto- and cross-correlation functions are useful in revealing new properties of correlation functions. The ??shared autocorrelation function property?? related to nonstandard PSK Golay sequences previously observed through computer search only are shown to propagate to infinite sequence lengths. The additivity property for mod-H codeword sequences and the aperiodic...
The proposed system identifies the species of the wood using the textural features present in its barks. Each species of a wood has its own unique patterns in its bark, which enabled the proposed system to identify it accurately. Automatic wood recognition system has not yet been well established mainly due to lack of research in this area and the difficulty in obtaining the wood database. In our...
Detrended fluctuation analysis (DFA) is a scaling method used to estimate long-range power-law correlation exponents in noisy signals. Data acquisition is an inherent part of the method. Continuous signals are converted into discretized, digital signals when the signals are sampled and then quantized, and the digital signals shall be referred to as coarse-grained results. In addition, coarse-graining...
Aiming at the defect of traditional risk priority number (RPN) method in FMECA, a RPN assessment method is put forward which bases on the fault propagation probability and cost, then a corrective actions choice method is presented by gray correlation theory. Firstly, the occurrence probability and cost are calculated according to fault propagation tree. RPN is assessed by the overall risk of the events...
The condition number distribution of random matrices is crucial to understand for statistical characterization of various communication systems. In this paper, we propose a general approximation methodology for the condition number distribution of finite dimensional Wishart matrices. This approximation leads to a computable expression for condition number distributions. The proposed method can be...
The assessment of co-expressed genes is an initial step to investigate the gene regulatory system in a microarray analysis. We designed a simple method to assess co-expressed genes from the expression profiles, based on the path consistency (PC) algorithm, which systematically infers a causal graph. The PC algorithm is simply modified for the frequent occurrence of high correlations between expression...
In order to evaluate the goodness of frequency hopping sequence design, the periodic Hamming correlation function is used as an important measure. Usually, the length of correlation window is shorter than the period of the chosen frequency hopping sequence, so the study of the periodic partial Hamming correlation of frequency hopping sequence is particularly important. In this paper, the periodic...
In this paper, we systematically construct a new class of quadriphase even-shift orthogonal sequences (or E-sequences) from Golay complementary codes using sequence interleaving. Besides having even-shift-orthogonal properties, the proposed E-sequences have zero real aperiodic correlation functions for all shifts, so it is also a special class of imaginary sequences (IS). Due to its ideal real aperiodic...
In this work a multimodal head-mounted device for the assessment of social orienting behavior in children between 12 and 24 months is presented. The device is specifically designed to be used in poorly structured and uncontrolled environments such as day-care centers. Accordingly, a calibration procedure is described which fully exploits the multimodal approach and which is particularly suitable for...
In this contribution, we investigate the impact of channel correlation on the ergodic capacity, capacity statistics and symbol error rate (SER) for maximal ratio combiner (MRC) multichannel diversity systems over correlated Rayleigh fading channels. We derive exact closed-form expressions for average channel capacity, an upper bound and its asymptotically tight approximation. The capacity statistics...
The performance of dual branch switch and stay combining (SSC) diversity receiver operating over correlated Rician fading channels in the presence of correlated Rayleigh distributed cochannel interference (CCI) is analyzed in this paper. A infinity-series representation for both the probability density function (PDF) and cumulative distribution function (CDF) of SSC output signal-to-interference ratio...
Frequency hopping (FH) sequences have important applications in FH-CDMA systems. In this paper, a simple but general construction of optimal FH sequence sets using difference-balanced functions is presented. It generalizes several known algebraic constructions of optimal FH sequences. In addition, new optimal FH sequence sets can be generated by the proposed construction.
For odd prime p, two new p-ary sequence families with period pn-1 are constructed for odd n=2l+1=me and even n=2l=me respectively. It is shown that, for a given integer rho, the proposed sequence families have maximum correlation 1+pn/2+(rho-1)e+1, family size (pn-1)pnrho/2, and maximum linear span n(n+3).
Huffman sequence has impulsive autocorrelation function and is applicable to radar and communications. This paper describes approximate expression for the sequence and considers sequence values. The sequence spectrum is expanded to polynomial groups related to approximate sequences. The first-order approximate sequence with real value is similar to a real-valued orthogonal periodic sequence with phase...
UWB system is very sensitive to timing jitter due to the extremely small width and low duty-cycle of the pulses it employs. The presence of timing jitter can markedly degrade the system throughput, BER performance and multiple-access performance, and even can disable the correlation receiver in severe condition. So, available measures should be taken to reduce the effects caused by timing jitter....
In multi-antenna wireless communications, spatial and temporal correlations always affect the performance of space-time codes (STC) designed for uncorrelated channels. In this paper, we use the Laplace transform and derive a closed-form expression for pairwise error probability (PEP) of STC over this double correlated fading channels. Numerical results show that the simple expression can achieve the...
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