The oversampling requirement in a delta–sigma modulator (DSM) is considered one of the limiting factors toward its employment in current high-frequency applications, such as wireless software defined radio (SDR) systems. This paper advances that the critical requirement for DSMs is high-frequency processing and not a high-oversampling ratio. A single-bit semiparallel processing structure to acc...

A number of oversampling filters in association with a heavily oversampled and noise-shaped digital-to-analog converter (DAC) are presented for high-resolution applications in professional and consumer digital audio environments. Computer simulations of oversampling filter, noise shaper, and DAC errors are described, together with results to demonstrate interactive performance dependence on fil...

Gene expression data are usually known for having a large number of features. Usually, some these features irrelevant and redundant. However, in cases, all features, despite being numerous, show high importance contribute to the analysis. In similar fashion, gene sometimes have limited instances with rate imbalance among classes. This can limit exposure classification model different categories...

Classification problems due to data imbalance occur in many fields and have long been studied the machine learning field. Many real-world datasets suffer from issue of class imbalance, which occurs when sizes classes are not uniform; thus, belonging minority likely be misclassified. It is particularly important overcome this dealing with medical because inevitably arises incidence rates within ...

We generalize the Second Oversampling Theorem for wavelet frames and dual wavelet frames from the setting of integer dilations to real dilations. We also study the relationship between dilation matrix oversampling of semi-orthogonal Parseval wavelet frames and the additional shift invariance gain of the core subspace.

We show that the second oversampling theorem for affine systems generates super-wavelets. These are frames generated by an affine structure on the space L 2 (R d) ⊕ ... ⊕ L 2 (R d) p times .

Sampling the diffraction pattern of a finite specimen more finely than the Nyquist frequency (the inverse of the size of the diffracting specimen) corresponds to surrounding the electron density of the specimen with a no-density region. When the no-density region is bigger than the electron-density region, sufficient information is recorded so that the phase information can be retrieved from th...

An improved digital backward propagation (DBP) is proposed to compensate inter-nonlinear effects and dispersion jointly in WDM systems based on an advanced perturbation technique (APT). A non-iterative weighted concept is presented to replace the iterative in analytical recursion expression, which can dramatically simplify the complexity and improve accuracy compared to the traditional perturba...

Traditional approaches tend to cause classier bias in the imbalanced data set, resulting poor classification performance for minority classes. In particular, there are many financial fraud, network intrusion, and fault detection, where recognition rate of classes is pertinent than majority Therefore, pressure on developing efficient algorithms solve class imbalance problem. To this end, article...