The Journal of Supercomputing

This paper presents a real-time audio-to-score alignment system for musical applications. The aim of these systems is to synchronize a live musical performance with its symbolic representation in a music sheet. We have used as a base our previous real-...

A parallel numerical simulation algorithm is presented for fractional-order systems involving Caputo-type derivatives, based on the Adams---Bashforth---Moulton predictor---corrector scheme. The parallel algorithm is implemented using several different ...

Today's smartphones make a broad variety of sensors (gyroscope, magnetometer, camera, accelerometer, GPS, etc.) readily available and easily accessible through different APIs, favouring the acquisition of data. An everyday usage is the measurement of ...

The reduction of the dimensionality is of great interest in the context of big data processing. Multidimensional scaling methods (MDS) are techniques for dimensionality reduction, where data from a high-dimensional space are mapped into a lower-...

The processing of digital sound signals often requires the computation of the QR factorization of a rectangular system matrix. However, sometimes, only a given (and probably small) part of the system matrix varies from the current sample to the next ...

Deep learning techniques based on Convolutional Neural Networks (CNNs) are extensively used for the classification of hyperspectral images. These techniques present high computational cost. In this paper, a GPU (Graphics Processing Unit) implementation ...

A proactive multicriteria mechanism for virtual data center optimization through server consolidation is proposed. In contrast with previous works where heuristic mechanisms were designed using expert knowledge, the new proactive approach uses ...

Optimization methods allow looking for an optimal value given a specific function within a constrained or unconstrained domain. These methods are useful for a wide range of scientific and engineering applications. Recently, a new optimization method ...

Security threats affecting electronics communications in the current world make necessary the encryption and authentication of every transaction. The increasing levels of security required are leading to an overload of transaction servers due to ...

Heterogeneous systems composed by a CPU and a set of different hardware accelerators are very compelling thanks to their excellent performance and energy consumption features. One of the most important problems of those systems is the workload ...

Record linkage is a technique widely used to gather data stored in disparate data sources that presumably pertain to the same real world entity. This integration can be done deterministically or probabilistically, depending on the existence of common ...

The new video coding standard high-efficiency video encoding (HEVC) greatly improves the efficiency of intra-prediction with respect to previous standards. However, these new features increase significantly the computational complexity, by evaluating ...

Advances in high-performance computing have led to an improvement in modeling multi-physics systems because of the capacity to solve complex numerical systems in a reasonable time. WRF---SFIRE is a multi-physics system that couples the atmospheric model ...

Recurrence plot analysis is a well-established method to analyse time series in numerous areas of research. However, it has exponential computational and spatial complexity. As the main result of this paper, a technique for the computation of recurrence ...

In food industry, the combined treatments based on high-pressure and temperature (HPT) are frequently used to increase the durability of the products without damaging their organoleptic and nutritional properties. However, achieving a reasonable ...

ITU-T Video Coding Expert Group and ISO/IEC Moving Picture Expert Group are studying the potential need for standardization of the future video coding technology with a compression capability that significantly exceeds that of the current High ...

The high efficiency video coding (HEVC) standard has opened the door to high-quality multimedia contents and new formats such as ultra-high definition as a result of the unceasing demands of the market. This standard is able to outperform prior ...

This paper presents an implementation of one of the most up-to-day algorithms proposed to compute the matrix trigonometric functions sine and cosine. The method used is based on Taylor series approximations which intensively uses matrix multiplications. ...

Curved monitors are getting more and more popular nowadays, due to the immersive sensation they provide to users in front of planar monitors. The display in curved monitors is cylindrical surfaces with significant curvatures, which must be taken into ...

The number of transmit and receiver antennas is an important factor that affects the performance and complexity of a MIMO system. A MIMO system with very large number of antennas is a promising candidate technology for next generations of wireless ...

The heliostat field of solar power tower plants can suppose up to 50% of investment costs and 40% of energy loss. Unfortunately, obtaining an optimal field requires facing a complex non-convex, continuous, large-scale, and constrained optimization ...

The Steered Response Power with Phase Transform (SRP-PHAT) algorithm is a well-known method for sound source localization due to its robust performance in noisy and reverberant environments. This algorithm is used in a large number of acoustic ...

This paper presents an analysis of an efficient parallel implementation of the active-set Newton algorithm (ASNA), which is used to estimate the nonnegative weights of linear combinations of the atoms in a large-scale dictionary to approximate an ...

With the advent of new high-throughput next-generation sequencing technologies, the volume of genetic data processed has increased significantly. It is becoming essential for these applications to achieve large-scale alignments with thousands of ...

We present a reliable and efficient FPGA implementation of a procedure for the computation of the noise estimation matrix, a key stage for subspace identification of hyperspectral images. Our hardware realization is based on numerically stable ...

The digital transforms are intensive in multiplication and accumulation operations which have a high computational cost. Advances in computer arithmetic and digital technologies allow simplifying the processing of complex algorithms when they are ...

Closed sets and minimal generators are fundamental elements to build a complete knowledge representation in formal concept analysis. The enumeration of all the closed sets and their minimal generators from a set of rules or implications constitutes a ...

Multibody systems consist of a set of components connected through some joints, where the movement of the system is determined by those of its components. Their design is computationally demanding, and the group equations formulation facilitates the ...

Mobile devices have seen their performance increased in latest years due to improvements on System on Chip technologies. These shared memory systems now integrate multicore CPUs and accelerators, and obtaining the optimal performance from such ...