Comparative study to realize an automatic speaker recognition system

In this research, we present an automatic speaker recognition system based on adaptive orthogonal transformations. To obtain the informative features with a minimum dimension from the input signals, we created an adaptive operator, which helped to identify the speaker’s voice in a fast and efficient manner. We test the efficiency and the performance of our method by comparing it with another approach, mel-frequency cepstral coefficients (MFCCs), which is widely used by researchers as their feature extraction method. The experimental results show the importance of creating the adaptive operator, which gives added value to the proposed approach. The performance of the system achieved 96.8% accuracy using Fourier transform as a compression method and 98.1% using Correlation as a compression method.

Strongly nonlocal unextendible product bases do exist

A set of multipartite orthogonal product states is locally irreducible, if it is not possible to eliminate one or more states from the set by orthogonality-preserving local measurements. An effective way to prove that a set is locally irreducible is to show that only trivial orthogonality-preserving local measurement can be performed to this set. In general, it is difficult to show that such an orthogonality-preserving local measurement must be trivial. In this work, we develop two basic techniques to deal with this problem. Using these techniques, we successfully show the existence of unextendible product bases (UPBs) that are locally irreducible in every bipartition in d⊗d⊗d for any d≥3, and 3⊗3⊗3 achieves the minimum dimension for the existence of such UPBs. These UPBs exhibit the phenomenon of strong quantum nonlocality without entanglement. Our result solves an open question given by Halder et al. [Phys. Rev. Lett. 122, 040403 (2019)] and Yuan et al. [Phys. Rev. A 102, 042228 (2020)]. It also sheds new light on the connections between UPBs and strong quantum nonlocality.

Large violations in Kochen Specker contextuality and their applications

It is of interest to study how contextual quantum mechanics is, in terms of the violation of Kochen Specker state-independent and state-dependent non-contextuality inequalities. We present state-independent non-contextuality inequalities with large violations, in particular, we exploit a connection between Kochen-Specker proofs and pseudo-telepathy games to show KS proofs in Hilbert spaces of dimension $d \geq 2^{17}$ with the ratio of quantum value to classical bias being $O(\sqrt{d}/\log d)$. We study the properties of this KS set and show applications of the large violation. It has been recently shown that Kochen-Specker proofs always consist of substructures of state-dependent contextuality proofs called $01$-gadgets or bugs. We show a one-to-one connection between $01$-gadgets in $\mathbb{C}^d$ and Hardy paradoxes for the maximally entangled state in $\mathbb{C}^d \otimes \mathbb{C}^d$. We use this connection to construct large violation $01$-gadgets between arbitrary vectors in $\mathbb{C}^d$, as well as novel Hardy paradoxes for the maximally entangled state in $\mathbb{C}^d \otimes \mathbb{C}^d$, and give applications of these constructions. As a technical result, we show that the minimum dimension of the faithful orthogonal representation of a graph in $\mathbb{R}^d$ is not a graph monotone, a result that may be of independent interest.

Creation of the spatial metric for the image of an agricultural object

The analysis of various approaches to forecasting complex multifactorial systems in conditions of uncertainty of external conditions is presented. It is necessary to develop these approaches in order to create adequate models of agricultural activities for their effective planning and management. A distinctive feature of agricultural production is a critical dependence on environmental factors, which cannot be accurately predicted. Regression modeling and analysis of time series used at present to solve this problem in difficult cases do not result in an adequate forecast of the dynamics of an agricultural object. As an approach, it is proposed to use the construction of the "image" of the system. This approach is classified as "nature-like", as it simulates a way of decision-making by a specialist on the basis of accumulated experience and intuition. The key parameter of this construction will be the correct choice of the metric (coordinate system). This approach is illustrated by an example of creating an image of a two-dimensional phenomenon in a one-dimensional coordinate system. As a result, an image is understood as an image of reality in a vector space of a certain dimension. The image in the authors' view is a reflection of reality in an artificially created metric, more suitable for understanding and analysis, but retaining the main (important) features and functions of the original object. Artificial intelligence techniques can be seen as tools for image creation and analysis. An important characteristic of an image is its predictive power, i.e. the ability to use the image in order to predict the state of a real object in the future period. An image retains its predictive power if the forecast obtained using this image corresponds to the data obtained when observing a real object. The image is formed in a suitable metric for solving a specific problem. The key metric parameter of the image of agricultural activity, suitable for forecasting purposes, is the minimum dimension of the vector space used, at which the predictive power of the image is retained to solve the problem.

Application of Offshore HDPE Pipes Route Design in North Maluku Indonesia

The lack of fresh water for the inhabitants of Maitara island is a very urgent problem to be solved. Two main factors at least must be taken into account to deliberate the right of way of subsea High-density polyethylene (HDPE) pipes, namely the hydrodynamic conditions and of a block analysis. This paper presents the study to justify the best route of subsea HDPE pipes based on hydrodynamic model analysis and concrete block strategy. The method used to analyze the best route includes 2 aspects. Firstly, the investigation method consisting of a bathymetric survey conducted by a single beam echosounder, 15 days tidal observations and seabed sediment sampling. Secondly, the hydrodynamic modelling analysis using Mike 21 FMHD and concrete block analysis, all these studies have been completed in August 2018. In the morphological behaviour analysis, three alternative routes are considered for the subsea HDPE pipes from Tidore Island to Maitara Island. The outcome of the analysis shows that the second track line option has the smallest impact by the hydrodynamic conditions, with a current speed of less than 0,5m/sec and a significant wave height of fewer than 1.2 meters. Furthermore, the uniformity of the lithology along the route is the other reason to select the second route. Finally, the concrete block analysis generated a minimum dimension of 75cm x 60cm x 30cm, and a free span of 3 meters is safe to absorb the uplift and drag forces acting on the pipe.

Optimization of a Faraday Cup Collimator for Electric Propulsion Device Beam Study: Case of a Hall Thruster

A Faraday cup (FC) is an instrument dedicated to current measurement in beams, jets and plasmas. It consists of a set of polarized electrodes mounted in such a way plasma sheath effect can be neglected, yielding accurate and reliable results. A FC is composed of three main parts, namely a collector or cup, which collects the current, a collimator, which defines the collection area and can contribute to limit electrons from entering the cup and a housing which protects the instrument from perturbation caused by the surrounding medium. In this paper, we provide experimental results of the effect of the collimator upon the measured ion current within the beam of a low-power Hall thruster. Different collimator materials, aperture diameters and polarization voltages are studied to determine the optimum design. Minimum dimension as well as appropriate materials are given as a conclusion in the case of low-power Hall thruster beam investigation.

Estrutura física e recursos materiais das salas de curativos das policlínicas regionais

RESUMOObjetivo: identificar a estrutura física e os recursos materiais das salas de curativos de Policlínicas Regionais de Niterói para o atendimento ao cliente com feridas. Método: trata-se de estudo qualitativo, descritivo, observacional e transversal. Elaboraram-se checklists para a coleta de dados e os analisaram por meio de estatística descritiva simples, utilizando o programa Excel. Apresentaram-se os resultados em forma de figuras. Resultados: encontraram quatro policlínicas com dimensão mínima adequada e duas inadequadas. Observou-se que, dos 22 materiais preconizados na literatura, apenas oito foram encontrados em todas as policlínicas. Conclusão: verificou-se a inexistência de uma unidade em consonância com o preconizado na literatura, uma vez que todas as policlínicas pesquisadas apresentaram algum tipo de carência, seja na estrutura, seja nos recursos materiais. Descritores: Enfermagem; Atenção Primária à Saúde; Ferimentos e Lesões; Cicatrização; Estrutura dos Serviços; Recursos Materiais em Saúde. ABSTRACT Objective: to identify the physical structure and material resources of the healing rooms of Regional Polyclinics of Niteroi to customer with wounds. Method: this is a qualitative study, descriptive, observational and cross-sectional. It drafted checklists for data collection and analyzed by means of simple descriptive statistics, using the Excel program. The results are presented in the form of figures. Results: we found four polyclinics with appropriate minimum dimension and two inadequate. It was observed that, of the 22 materials recommended in the literature, only eight were found in all the polyclinics. Conclusion: it was verified that the absence of a unit in line with the recommendations in the literature, since all the clinics surveyed had some kind of grace, be in the structure, either in material resources.Descriptors: Nursing; Primary Health Care; Wounds and Injuries; Healing; Structure of Services; Material Resources in Health.RESUMEN Objetivo: identificar la estructura física y los recursos materiales de las salas de curación de Policlínicas Regionales de Niterói para clientes con heridas. Método: este es un estudio cualitativo, descriptivo, observacional y transversal. Se redactaron listas de comprobación para la recopilación de datos y analizados por medio de la estadística descriptiva simple, utilizando el programa Excel. Los resultados se presentan en forma de cifras. Resultados: se encontraron cuatro policlínicas con dimensión mínima adecuada y dos insuficientes. Se observó que, de los 22 materiales recomendados en la literatura, sólo ocho fueron encontrados en todas las policlínicas. Conclusión: se comprobó que la ausencia de una unidad en línea con las recomendaciones en la literatura, ya que todas las clínicas encuestadas tenían algún tipo de gracia, sea en la estructura, ya sea en los recursos materiales. Descriptores: Enfermería; Atención Primaria a la Salud; Heridas y Lesiones; Cicatrización; Estructura de los Servicios; Recursos Materiales en Salud.