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https://purl.org/pe-repo/ocde/ford#5.02.04
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https://purl.org/pe-repo/ocde/ford#2.02.04
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https://purl.org/pe-repo/ocde/ford#2.11.04
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https://purl.org/pe-repo/ocde/ford#2.00.00
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Control interno
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https://purl.org/pe-repo/ocde/ford#5.00.00
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https://purl.org/pe-repo/ocde/ford#5.05.01
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1
tesis de maestría
Publicado 2019
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This master thesis is devoted to the design, analysis, and experimental validation of an energy-based control strategy for the well-known benchmark cart-pole system in implicit Port-Hamiltonian (PH) representation. The control scheme performs two tasks: swingup and (local) stabilization. The swing-up controller is carried out on the basis of a generalized energy function and consists of bringing the pendulum trajectories from the lower (stable) position to a limit cycle (homoclinic orbit), which passes by the upright (unstable) position, as well as the cart trajectories to the desired point. The (local) stabilizing controller is designed under a novel algebraic Interconnection and Damping Assignment Passivity-Based Control (IDA-PBC) technique and ensures the upright (asymptotic) stabilization of the pendulum as well as the cart at a desired position. To illustrate the effectiveness of th...
2
tesis de maestría
Publicado 2019
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This master thesis is devoted to the design, analysis, and experimental validation of an energy-based control strategy for the well-known benchmark cart-pole system in implicit Port-Hamiltonian (PH) representation. The control scheme performs two tasks: swingup and (local) stabilization. The swing-up controller is carried out on the basis of a generalized energy function and consists of bringing the pendulum trajectories from the lower (stable) position to a limit cycle (homoclinic orbit), which passes by the upright (unstable) position, as well as the cart trajectories to the desired point. The (local) stabilizing controller is designed under a novel algebraic Interconnection and Damping Assignment Passivity-Based Control (IDA-PBC) technique and ensures the upright (asymptotic) stabilization of the pendulum as well as the cart at a desired position. To illustrate the effectiveness of th...
3
artículo
Publicado 2016
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This paper involves a practical approach to perform quality-control/quality-assessment of concrete using vibration-based NDT. The first component is the analysis of compressive strength and dynamic E-modulus of concrete samples from various construction projects. The second component involves continuous measurements of E-Moduli as a function of curing time in laboratory-controlled specimens. The experimental program allowed proposing a correlation to predict the expected static and dynamic E-modulus at 28 days from their measurement at any instant of the curing process. A similar relationship is proposed to predict compressive strength at 28 days based on the dynamic E-modulus measured at earlier ages.
4
artículo
Publicado 2018
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In 2013, there were 25.7 million stroke survivors and 6.5 million stroke-related deaths. Previous studies have indicated that approximately 40% of stroke survivors remain with functional impairments and need physical rehabilitation. However, many barriers could limit access to continuous physical rehabilitation for these patients, so devices that complement or assist in the rehabilitation process can be of great help. The quality, safety and efficacy of medical devices should be evaluated in randomized controlled trials (RCTs). However, the efficacy of many medical devices entering the market in the United States and the European Union (EU) has not been evaluated. Unproven post-stroke rehabilitation devices could be useless or even harmful to patients, thereby increasing healthcare costs. Previous studies have found that post-stroke rehabilitation devices without a rigorous evidence base...
5
artículo
Publicado 2022
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A novel design procedure for tuned mass dampers in isolated structures is presented. The proposed optimization method is specifically developed to control base displacements or to solve the large isolator displacement problem in this type of structures under earthquakes. Therefore, it is based on a displacement transmissibility function, T, a particular case of the general transmissibility concept, which comes from Vibration Isolation. Three contributions are: 1) application of new seismic displacement narrowbandness, 2) simpler relative transmissibility function, and 3) compound design of isolation plus tuned mass damper. A standard isolated model is used to show that the base displacement can be controlled at levels in the proximity of the ground motion (T ≈ 1), which results in a positive comparison with previous isolation plus tuned mass damper solutions; this is one of the main co...
6
objeto de conferencia
We present the simulation of the application of the Model-based Predictive Control (MPC) of the drum level in a Combined Cycle Plant in order to minimize the time for reaching the highest capacity of plant, around 225 MW. In contrast to others control techniques, our simulation yields that the MPC has shown capabilities as to reach its expected power in about 40 minutes before than PID, time which normally takes the whole industrial process under this control. In the present study, we have tested up to three different reference functions in order to compare performance during the drum level control. According to the simulations, the MPC working together with these reference functions is seen to be promising in the sense of providing efficiency to the plant from the startup until the time when system is reaching 225 MW. We have also calculated a minor discrepancy of order of lees than 5%.
7
tesis de maestría
Publicado 2014
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Los principales objetivos de esta tesis son, en primer lugar la identificación de un sistema dinámico no lineal y basado en el modelo identificado proponer una estrategia de control predictivo no lineal basado en modelos (MPC), utilizando un sistema de polinomios ortogonales para expresar las no linealidades del sistema. Otro objetivo de esta propuesta es el uso del algoritmo de control de la “Matriz Dinámica de Control" (DMC). El primer objetivo se logra mediante la aplicación de un método para la identificación de sistemas no lineales utilizando Polinomios de Laguerre Generalizados (PGL), para el cual los parámetros del sistema se extraen utilizando un conjunto de datos de entrada- salida obtenido mediante la aplicación de una secuencia pseudo aleatoria multinivel (PRMS) al sistema utilizado para validar la propuesta. La metodología ha sido validada en el sistema de identifi...
8
artículo
Publicado 2024
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The present article discusses the constitutionality of the system for eliminating bureaucratic barriers implemented by the Comisión de Eliminación de Barreras Burocráticas (CEB) and the Sala de Eliminación de Barreras Burocráticas (SEL) of INDECOPI. It demonstrates that these entities do not engage in strict constitutional review but are limited to declaring the illegality or unreasonableness of bureaucratic barriers without repealing the underlying norms. Thus, they do not assume jurisdictional functions nor conduct a proper constitutional review of general administrative provisions and administrative acts. Instead, they ensure the legality and reasonableness of administrative regulation, coexisting with other forms of constitutional control such as the popular action and diffuse control.
9
tesis doctoral
Publicado 2025
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Maintaining the stability of bipedal walking remains a major challenge in humanoid robotics, primarily due to the large number of hyperparameters involved and the need to adapt to dynamic environments and external disturbances. Traditional methods for determining these hyperparameters, such as heuristic approaches, are often time- consuming and potentially suboptimal. In this thesis, we present an integrated approach combining advanced control and reinforcement learning techniques to improve the stability of bipedal walking, particularly in the face of ground disturbances and speed variations. Our main contribution lies in the integration of two complementary approaches: (1) an intrinsically stable model predictive control (IS-MPC) combined with whole-body admittance control, and (2) a reinforcement learning module implemented in the mc_rtc framework. This system allows for continuous mo...
10
artículo
Publicado 2022
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High penetration of renewable energy sources (RES) leads to new challenges for protection devices. Protection schemes are typically designed according to the dynamic behavior of rotating machines as generation sources, while the RES dynamic response, mainly governed by inverters, is not considered. Consequently, some relevant algorithms of transmission line protection are experiencing challenges because of the fact that magnitude and phase angle com parison, amount of negative-sequence, and short-circuit current level are affected by the RES. Therefore, an in-depth study of this issue is necessary, one which considers the main causes and new methodological criteria solutions. This work presents an extensive literature review of the evaluation of electrical protection performance and the effects of RES connected to a power grid through inverters. Bibliographic data on many representative ...
11
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...
12
artículo
Publicado 2015
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The present article demonstrates the historical bases previous to the success of alternative development in the region San Martín. It shows that anti-drug policy was unable to successfully function during the 1980s due to an absence of basic security conditions in the region. The ar- ticle’s main objective consists in presenting how the state managed to meet said security condi- tions. Thus, this article is divided into two periods of analysis. First, it focuses on the time period from 1980 to 1989 and shows how generalized state repression resulted counterproductive in the region because of strong subversive forces. Second, it presents the time period from 1989 to 1995 and demonstrates how the exercise of sequential period of focalized repression facilitated an environment to fight against drug trafficking. In this way, the focalized strategy and sequence permitted the state ...
13
tesis de grado
Publicado 2018
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El presente trabajo de investigación se realizó con el objetivo de desarrollar un sistema basado en la tecnología chatbot para el control y monitoreo del cultivo de arroz en la ciudad de Chiclayo, en el año 2018. El tipo de estudio fue pre-experimental, con diseño de pre test y post test. La muestra universal estuvo constituida por un total de 15 agricultores que trabajan en la ciudad de Chiclayo. Para la obtención de los datos se aplicó 4 cuestionarios constituidos por 6 ítems. Las dimensiones comprendidas en la tecnología chatbot son el sistema de notificaciones, tiempo de respuesta y funcionalidad integrada; mientras que la dimensión comprendida en el control y monitoreo del cultivo de arroz son el cumplimiento de las actividades, atención de incidencias, nivel de satisfacción de la efectividad de la respuesta y nivel de conocimiento de plagas/enfermedades. Los resultados ...
14
artículo
Blockchain technology is expected to change the way in which the exchange of goods and services is developed, the management of conflicts, and will substantially influence the process of state modernisation. The current research aims to be a simple organisational and theoretical guide that provides a strategy for the process of conflict management in the state sphere. This is based on the imperative need to modernise the current public system, based on the division of powers. This article fundamentally emphasises three concordant ideas: first, that blockchain technology helps to automate certain tasks, thus facilitating access to a decentralised space independent of a central control authority. It democratises and makes management and decision-making processes transparent, allowing all those involved to be examined on an equal footing, and third, it aims to maintain the necessary manual ...
15
artículo
Publicado 2020
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The protozoan parasite Leishmania (Viannia) braziliensis (L. braziliensis) is the main cause of human tegumentary leishmaniasis in the New World, a disease affecting the skin and/or mucosal tissues. Despite its importance, the study of the unique biology of L. braziliensis through reverse genetics analyses has so far lagged behind in comparison with Old World Leishmania spp. In this study, we successfully applied a cloning-free, PCR-based CRISPR–Cas9 technology in L. braziliensis that was previously developed for Old World Leishmania major and New World L. mexicana species. As proof of principle, we demonstrate the targeted replacement of a transgene (eGFP) and two L. braziliensis single-copy genes (HSP23 and HSP100). We obtained homozygous Cas9-free HSP23-and HSP100-null mutants in L. braziliensis that matched the phenotypes reported previously for the respective L. donovani null muta...
16
tesis de grado
Publicado 2024
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The study proposed an inventory policy for its products with the highest demand based on the analysis of the application of three planning techniques, which were the Silver Meal method, the minimum unit cost method and the EOQ. In addition, forecasting techniques were applied with a bimonthly historical data from the sales record that helped identify the products with the highest demand according to the ABC classification. The methodology carried out in a grocery store in Peru found that the demand behavior differed in each product; so, the standard deviation was analyzed. Then, the application of the three planning techniques was compared where a similarity in the frequency of orders and quantity between the Silver Meal and MCU was observed; on the other hand, the EOQ functioned as a preliminary step to identify a reorder point.
17
tesis de maestría
Publicado 2020
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El presente trabajo de investigación se desarrolla en la Institución Educativa Particular (I.E.P.) Isaac Newton S.A.C., que brinda servicios educativos en los niveles de inicial primaria y secundaria. Esta investigación está orientada a identificar los factores que afectan el cumplimiento de los objetivos institucionales determinados por los directivos, los cuales están dirigidos al crecimiento, rentabilidad económica y calidad del servicio para el aseguramiento de su sostenibilidad en el tiempo. Con el fin de identificar las causas de los principales problemas de rentabilidad y atraso en el cobro de pensiones que impactan en la liquidez de la entidad, se realizaron entrevistas estructuradas a la administración para conocer la institución. También, se analizó su entorno y la forma cómo opera dentro de él. Asimismo, se elaboraron cuestionarios tomando como referencia el enfoqu...
18
tesis de maestría
Publicado 2020
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El presente trabajo de investigación se desarrolla en la Institución Educativa Particular (I.E.P.) Isaac Newton S.A.C., que brinda servicios educativos en los niveles de inicial primaria y secundaria. Esta investigación está orientada a identificar los factores que afectan el cumplimiento de los objetivos institucionales determinados por los directivos, los cuales están dirigidos al crecimiento, rentabilidad económica y calidad del servicio para el aseguramiento de su sostenibilidad en el tiempo. Con el fin de identificar las causas de los principales problemas de rentabilidad y atraso en el cobro de pensiones que impactan en la liquidez de la entidad, se realizaron entrevistas estructuradas a la administración para conocer la institución. También, se analizó su entorno y la forma cómo opera dentro de él. Asimismo, se elaboraron cuestionarios tomando como referencia el enfoqu...
19
tesis doctoral
Publicado 2010
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EL desarrollo de la investigación de la Tesis de “Base de Datos Distribuidos Usando Algoritmos Genéticos Para Optimización de Proceso Transacción en la Web”, ha sido posible llegar a las siguientes conclusiones: Hay deficiencia en el tiempo de procesos de transacción por el procesador del servidor; que actualmente trabajan con algoritmos tradicionales; como la lectura / escritura de datos en el disco magnético en el servidor Web, produciéndose por ejemplo, demora en la cola de espera, demora en tiempo de proceso de transacción, demora en tiempo de respuesta, que ocasionan los denominados cuellos de botella, falta memoria, etcétera. El problema central que se propone está orientado al crecimiento y, evolución del servidor web de una manera económica y escalable que lleva a un rendimiento óptimo. Por consiguiente, existe la necesidad de estudiar los procesos de transaccion...
20
tesis de grado
Publicado 2011
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Project developed in order to optimize resources to use in another part of the network, the way in which was implemented is based on several analysis and tests in field which demanded several hours of hard work. The main functions of different parts of the network have been covered in a superficial way because the core of the project is related to performed activities inside an EBTS (Enhanced Base Transceiver System). Iden Network has been implemented based on a number of equipments designed by different manufacturers, the main manufacturer in the network is Motorola, but there are several manufacturers whose equipments are part of the network (e.g. Nortel, Cisco, Tellabs, HP, etc). Iden Technology belongs to Motorola Company; therefore they are on charge of the design, repair and support of the operators which has decided offer different services with this system along the world. The En...
