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computer error » computer sector (Expander búsqueda), computer eirl (Expander búsqueda), computer room (Expander búsqueda)
error function » vector function (Expander búsqueda), motor function (Expander búsqueda)
computer error » computer sector (Expander búsqueda), computer eirl (Expander búsqueda), computer room (Expander búsqueda)
error function » vector function (Expander búsqueda), motor function (Expander búsqueda)
1
objeto de conferencia
Publicado 2016
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We propose the formalism of the Dirac-Delta functions with polynomial argument to measure the probability of call completion (PCC) which plays an importance role in the development and assessment of the telecommunications. The measurement of the PCC is also translated as a rough estimate of the Quality-of-Service of providers of cellular communication. In order to test the model, the Dirac-Delta operator acts onto families of step-functions that would play the role of input functions. Thus, the I/O scheme is applied resulting in a nonlinear system of up to 12 parameters. In this manner, By assuming the case where the end users are performing handover under velocities less than 100 km/h, our simulations have determined a discrepancy between a known model and our approach which is of order of 7% due to the minor computational errors.
2
artículo
The current study relates to designing a swarming computational paradigm to solve the influenza disease system (IDS). The nonlinear system’s mathematical form depends upon four classes: susceptible ndividuals, infected people, recovered individuals and cross-immune people. The solutions of the IDS are provided by using the artificial neural networks (ANNs) together with the swarming computational paradigm-based particle swarm optimization (PSO) and interior-point scheme (IPA) that are the global and local search approaches. The ANNs-PSO-IPA has never been applied to solve the IDS. Instead a merit function in the sense of mean square error is constructed using the differential form of each class of the IDS and then optimized by the PSOIPA. The correctness and accuracy of the scheme are observed to perform the comparative analysis of the obtained IDS results with the Adams solutions (ref...
3
objeto de conferencia
Publicado 2016
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We report the application of the Model-based Predictive Control (MPC) to improve the performance of the start-up of a 150-175 MW combined cycle power plant whose gas turbine is fueled by natural gas. In concrete the simulations have shown that the efficient drum level control is reflected on the improvement of power efficiency in the sense of reaching the 225 MW set point in around 45 minutes faster than the case of PID. Experimental data taken from ordinary runs from power plant was used for ends of system identification which is based on convolution integrals resulting well adjustable to the acquired data. Simulations have demonstrated that the performance of the MPC surpasses to the one of classic PID essentially in two aspects: (i) reducing the time for reaching set point and (ii) avoiding unexpected critical situations during the plant start-up. Results have indicated that the MPC m...
4
objeto de conferencia
Publicado 2017
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The present study proposes a method of automatic detection of tuberculosis (TB) bacilli from digital images of Ziehl Neelsen sputum smear baciloscopy. The method is based on an algorithm that aims to automate the interpretation of optical microscopic images of sputum smears. According to the World Health Organization (WHO), a specialist can not analyze and process more than 20 samples per day (in order to not affect the analysis sensitivity and commit errors in diagnosis). Therefore, an automated tool as the proposed here, is an important contribution to the current efforts to fight tuberculosis. The algorithm is based on geometric eccentricity of ellipses and improvement of RGB component tones. Correspondence functions adjusted to sample preparation conditions were applied in order to improve the RGB primary component tones of the image. This allows to obtain an adequate segmentation of...
5
tesis de grado
Publicado 2023
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The systems engineer from the University of Lima is a professional who plays a key role in organizations thanks to his technical capabilities and knowledge of the Company operation that enables him to propose, evaluate, develop and implement information technology solutions. During my professional performance important achievements have been achieved, I mention: Technically lead integration projects with SAP that guarantee tangible benefits to the business. Implement improvements in SAP that facilitate the day-to-day of collaborators. Increase the satisfaction level of companies with the SAP support and maintenance service. In recognition, I have carried out a career line in the company Productos Tissue del Peru S.A.C, where I started as a SAP Analyst, I was promoted to SAP Specialist and I currently work as a SAP coordinator. Undoubtedly, the achievements and recognitions obtained would...
6
7
objeto de conferencia
Publicado 2017
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We presented a generalization of the delay-and-sum beamforming based on the Dirac-Delta functions but with nonlinear argument. For this end, a closed-form expression of the beampattern mathcal{B}(r)=\sum\nolimits-{k,q}w(k,q,r)x(k,q,r) with r = r(θ), was derived. This expression is computationally simulated through an algorithm that includes integer-order Bessel input functions and random noise. The 4M+N model parameters provided by the Dirac-Delta method are extracted by using a Monte-Carlo-like step which selects the best values for B(r) minimizing the Monte-Carlo error for Δθ = 0.5% for the case of beam response of θ0=30 degrees. These results might sustain the fact that beamforming techniques can use Dirac-Delta functions for modeling arrival signal even in those cases where strong nonlinearity is involved.
8
objeto de conferencia
Publicado 2016
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We present a model of Probability of Success Call Completion (PSCC) from a typical I/O procedure and computationally tested through Monte Carlo simulation with Gaussian profiles. Under the I/O view the input and transfer functions are prepared without to abandon the randomness nature of the phenomenology. Because kernels are required by the I/O formulation, we have assumed that the Dirac-Delta functions play the role of kernels in according to the I/O representation. The results would indicate that under certain circumstances the formulation I/O is valid by a 10% of error respect to the Meo-Ajmone model. However, the weakness of the I/O approach would be in the extraction of a large number of free parameters, which do not necessarily encompasses the dynamic of phenomenon.
9
artículo
Concern for the quality of software-based systems has grown as software is integrated into every aspect of our lives. With the increase in the number of users and the data stored, more robust and secure databases are necessary. Quality control testing has progressed systematically from manual to automated applications. The Information Technology for Defense Company has the Center for Quality Standards and Security in charge of certifying and technically evaluating computer products, guaranteeing their quality. Currently the database review process in the SQLite manager is manual, making this process difficult, where there may be a margin of error due to the amount of checks that must be reviewed. The present work aims to develop a data architecture review component for the SQLite management server. For this, a study of a homologous database management system is carried out, the tools for...
10
tesis de maestría
Nanopositioning and nanomeasuring machines are playing an increasingly important role in the evolution of modern technologies in various fields. The Institute of Process Measure ment and Sensor Technology at Ilmenau University of Technology has been researching for more tan one decade high precisión machines. In this direction, the general objective of this master tesis is the development of aderivative-free model reference adaptive control (DFMRAC) algorithm for the vertical axisofa nanopositioning and nanomeasuring machine. Firstly, a nonlinear unknown friction term is included in the adaptation process of a standard model reference adaptive control (MRAC) and the DFMRAC. Then, the MRAC and DFMRAC algorithms are developed theoretically, in which the DFMRAC stability análisis requiresa Lyapunov-Krasovskii functional to prove that the error signal and the weightpa- rameters are uniform...
11
tesis de grado
Publicado 2022
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En el comienzo de la pandemia, El Perú paso a ser uno de los países en la cual fue golpeado por este flagelo y las importaciones de tecnología fue reduciendo como el azote de la economía global y asimismo ocasiono que los servicios de recojo de residuos sólidos fueran reducidos y a ello a muchas familias ocasionando un declive en su economía. Asimismo, la Empresa Jaiplast SRL, se vio reflejado por el impacto ocurrido en sus trabajadores por lo cual se vio la necesidad de mejorar la funcionalidad de la red para el bienestar de los trabajadores como también mejorar en la optimización de la infraestructura informática. El trabajo de investigación tiene como objetivo Optimizar las redes de comunicaciones para mejorar la gestión de desempeño TI en la Empresa Jaiplast SRL. Dicho estudio es en base a un proceso de investigación aplicada, descriptivo y correlacional. Se utilizó la ...
12
tesis de maestría
Nanopositioning and nanomeasuring machines are playing an increasingly important role in the evolution of modern technologies in various fields. The Institute of Process Measure ment and Sensor Technology at Ilmenau University of Technology has been researching for more tan one decade high precisión machines. In this direction, the general objective of this master tesis is the development of aderivative-free model reference adaptive control (DFMRAC) algorithm for the vertical axisofa nanopositioning and nanomeasuring machine. Firstly, a nonlinear unknown friction term is included in the adaptation process of a standard model reference adaptive control (MRAC) and the DFMRAC. Then, the MRAC and DFMRAC algorithms are developed theoretically, in which the DFMRAC stability análisis requiresa Lyapunov-Krasovskii functional to prove that the error signal and the weightpa- rameters are uniform...
13
artículo
Publicado 2025
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Objetivos: El presente estudio piloto de tipo observacional analítico in vitro evaluó la exactitud de tres localizadores apicales (Root ZX mini/Morita, Endo Radar Plus/Woodpecker y Endo Motor SCM-011/Fanta) para la determinación de la longitud radicular, comparando mediciones realizadas con limas manuales y mecanizadas con respecto a un valor de referencia obtenido por tomografía computarizada de haz cónico (CBCT). Materiales y métodos: Se utilizaron 60 dientes humanos permanentes, distribuidos aleatoriamente en tres grupos según el localizador apical utilizado. Se midió la longitud del conducto con limas manuales (sin motor) y con limas mecanizadas accionadas por motor con función de localizador integrada. Se calcularon los errores absolutos en relación con el valor de referencia y se aplicaron pruebas t de Student y Anova (p <0,05). Resultados: Los resultados mostraron que...
14
artículo
Publicado 2018
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This paper presents Best Theory Diagrams (BTDs) constructed from various non-polynomial theories for the static analysis of thick and thin symmetric and asymmetric cross-ply laminated plates. The BTD is a curve that provides the minimum number of unknown variables necessary for a fixed error or vice versa. The plate theories that belong to the BTD have been obtained by means of the Axiomatic/Asymptotic Method (AAM). The different plate theories reported are implemented by using the Carrera Unified Formulation (CUF). Navier-type solutions have been obtained for the case of simply- supported plates loaded by a bisinuisoidal transverse pressure with different length-to-thickness ratios. The BTDs built from non-polynomials functions are compared with BTDs using Maclaurin expansion. The results suggest that the plate models obtained from the BTD using non-polynomial terms can improve the accu...
15
tesis de grado
Publicado 2022
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El presente trabajo presenta como objetivo determinar como la implementación del Sistema Móvil mejorará la gestión de soporte de TI para la empresa FTS E.I.R.L. Acerca de la gestión de atención al cliente, gestión de índice de productividad y gestión de eficiencia de procesos. La empresa FTS E.I.R.L. actualmente cuenta con un sistema de manejo de los procesos de soporte de TI deficiente; no obstante, dicho sistema presenta algunos errores en su funcionamiento, lo cual afecta considerablemente a las áreas de consultas y de atención. Esto se debe principalmente por la demora en la atención a clientes, ocasionando dificultades en la búsqueda de productos, pérdidas de productos y un deficiente flujo de negocio del sistema actual. El soporte de TI cubre todos los servicios que asisten en el buen uso, mantenimiento e implementación de los recursos técnicos de la empresa. Se pue...
16
artículo
Publicado 2022
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The current work aims to design a computational framework based on artificial neural networks (ANNs) and the optimization procedures of global and local search approach to solve the nonlinear dynamics of the spread of COVID-19, i.e., the SEIR-NDC model. The combination of the Genetic algorithm (GA) and active-set approach (ASA), i.e., GA-ASA, works as a global-local search scheme to solve the SEIR-NDC model. An error-based fitness function is optimized through the hybrid combination of the GA-ASA by using the differential SEIR-NDC model and its initial conditions. The numerical performances of the SEIR-NDC nonlinear model are presented through the procedures of ANNs along with GA-ASA by taking ten neurons. The orrectness of the designed scheme is observed by comparing the obtained results based on the SEIR-NDC model and the reference Adams method. The absolute error performances are perf...
17
tesis de maestría
Publicado 2015
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Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Estadística Aplicada
18
El objetivo de este trabajo de investigación es cómo viaja la señal a través del medio de transmisión, se pueden dividir en dos grupos principales: medios de transmisión controlados y medios de transmisión no controlados. Dependiendo del sentido de transmisión, podemos encontrar diferentes tipos: simplex, half duplex y full duplex. Los medios portátiles también se caracterizan por el hecho de que se utilizan en diferentes bandas de frecuencias operativas. La velocidad en baudios depende directamente de la distancia entre los terminales y de si el medio se utiliza para crear una línea punto a punto o una línea de comunicación multipunto. Como resultado, diferentes medios tienen diferentes velocidades de conexión que se adaptan a diferentes usos. De manera similar, los sistemas de comunicación en los que se transmiten directamente modulaciones de banda base digitales a menud...
19
tesis doctoral
Publicado 2022
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El metilmercurio MeHg+ es una especie organometálica producida en los ambientes acuáticos y que es más tóxica que las especies inorgánicas de mercurio Hg2+ y Hgº, pues es soluble en los tejidos grasos de los animales y se bioacumula. En el presente trabajo se realizó estudios para la obtención de polímeros impresos iónicos IIPs selectivos a metilmercurio MeHg+. Previamente, se hizo un estudio computacional para calcular la energía de enlace que se produce en la etapa de prepolimerización empleando el método Teoría Funcional de la Densidad (DFT). A partir de los resultados de la simulación, se seleccionaron 2-mercaptobenzimidazol (MBI) y 2-mercaptobenzotiazol (MBT) como agente quelantes de sulfhidrilo, ácido acrílico (AA) como monómero funcional y etanol como disolvente porogénico. Los IIPs para MeHg+ (IIP-MBI-AA y IIP-MBT-AA) y sus respectivos polímeros control no imp...
20
artículo
Pothole detection and International Roughness Index (IRI) calculation using ATVs for road monitoring
Publicado 2024
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The accelerated deterioration of roads is conditioned by parameters such as climate change, poor construction, and heavy vehicle traffic. Two relevant measures to monitor the condition of a road are the International Roughness Index (IRI) and the number of functional failures in a segment, mainly potholes, since they are associated with higher risks such as accidents or damage to vehicle mechanics. In the state of the art, pothole detection or International Roughness Index (IRI) calculation algorithms are proposed, but they use vehicles designed to produce less vibration and use phones that decrease the performance of the embedded sensors. In addition, some works propose complex algorithms of higher computational load that leads to use more hardware and power consumption. In this context, the present work aims to monitor the condition of a road through low-cost dedicated sensors implemen...
