82 research outputs found
Diseño de un plan comercial para la Empresa Comisariato “Red Market” de la ciudad de Riobamba, provincia de Chimborazo, para el periodo 2016
Este proyecto de trabajo de titulación se desarrolla en el comisariato Red Market de la ciudad de Riobamba, dicha empresa se dedica a la comercialización de productos de primera necesidad para el hogar como: víveres, legumbres, lácteos, productos de aseo personal y de limpieza para el hogar vendiéndolos al por mayor y menor en su establecimiento. Se detectó que el problema principal del comisariato son las bajas ventas que obtiene debido a que no desarrolla actividades de promoción y publicidad para darse a conocer en la ciudad de Riobamba, por lo cual no logra tener una alta participación en el mercado local, añadido a esto a que no planifica actividades para generar mayor captación de clientes. Para dar solución a los problemas antes mencionados se propone un plan comercial para el comisariato Red Market, mismo que se ajuste a sus requerimientos actuales, en este plan se realizó un diagnostico situacional interno y externo, un análisis de las fuerzas de Porter, el direccionamiento estratégico del comisariato, marketing mix y así mismo se plantea los objetivos estratégicos del plan comercial. Con el plan comercial se busca dinamizar las actividades comerciales de Red Market, mejorando el proceso de ventas con una mejor calidad de servicio, se implantara actividades de publicidad y se establece políticas de precios para que todo esté definido y no se improvise ninguna actividad en el comisariato.The present degree work with the topic Design of a Commercial Plan for the commissariat Red Market of the city of Riobamba, province of Chimborazo, for the period 2016, Which is dedicated to the retail and Wholesale businesses for basic needs at home. It has as aim to offer a tool of comercial management that allows generating higher sales to the commissariat. For collecting data, surveys were made to the current and potencial customers, by means of which the likes ande preferences, main characteristics and relevant aspects that are considered important at the moment to decide in which place to go shopping, as well as a SWOT analysis allowed knowing its current situation. To desing the comercial plan, four stages were planned as follows: the first, the situational diagnosis stage; the second stage the estrategic direction; the third stage, commercialization strategies and the fourth stage, implementing and execution. All of these adapted to the requirements of the commissariat. With the implementing of the comercial plan will generate a bigger customer acquisition, counting with planned activities of advertisement, reaching a higher participation in the Market and increasing the sales. An important recommendation to mention is to make a correct implementing of the comercial plan, a tracking and control to evaluate the final outcomes and feedback for the coming periods
Combining a hierarchical task network planner with a constraint satisfaction solver for assembly operations involving routing problems in a multi-robot context
This work addresses the combination of a symbolic hierarchical task network planner and a constraint satisfaction solver for the vehicle routing problem in a multi-robot context for structure assembly operations. Each planner has its own problem domain and search space, and the article describes how both planners interact in a loop sharing information in order to improve the cost of the solutions. The vehicle routing problem solver gives an initial assignment of parts to robots, making the distribution based on the distance among parts and robots, trying also to maximize the parallelism of the future assembly operations evaluating during the process the dependencies among the parts assigned to each robot. Then, the hierarchical task network planner computes a scheduling for the given assignment and estimates the cost in terms of time spent on the structure assembly. This cost value is then given back to the vehicle routing problem solver as feedback to compute a better assignment, closing the loop and repeating again the whole process. This interaction scheme has been tested with different constraint satisfaction solvers for the vehicle routing problem. The article presents simulation results in a scenario with a team of aerial robots assembling a structure, comparing the results obtained with different configurations of the vehicle routing problem solver and showing the suitability of using this approach.Unión Europea ARCAS FP7-ICT-287617Unión Europea H2020-ICT-644271Unión europea H2020-ICT-73166
Autonomous 3D Exploration of Large Structures Using an UAV Equipped with a 2D LIDAR
This paper addressed the challenge of exploring large, unknown, and unstructured
industrial environments with an unmanned aerial vehicle (UAV). The resulting system combined
well-known components and techniques with a new manoeuvre to use a low-cost 2D laser to measure
a 3D structure. Our approach combined frontier-based exploration, the Lazy Theta* path planner, and
a flyby sampling manoeuvre to create a 3D map of large scenarios. One of the novelties of our system
is that all the algorithms relied on the multi-resolution of the octomap for the world representation.
We used a Hardware-in-the-Loop (HitL) simulation environment to collect accurate measurements
of the capability of the open-source system to run online and on-board the UAV in real-time. Our
approach is compared to different reference heuristics under this simulation environment showing
better performance in regards to the amount of explored space. With the proposed approach, the UAV
is able to explore 93% of the search space under 30 min, generating a path without repetition that
adjusts to the occupied space covering indoor locations, irregular structures, and suspended obstaclesUnión Europea Marie Sklodowska-Curie 64215Unión Europea MULTIDRONE (H2020-ICT-731667)Uniión Europea HYFLIERS (H2020-ICT-779411
Coastal Areas Division and Coverage with Multiple UAVs for Remote Sensing
This paper tackles the problems of exact cell decomposition and partitioning of a coastal region for a team of heterogeneous Unmanned Aerial Vehicles (UAVs) with an approach that takes into account the field of view or sensing radius of the sensors on-board. An initial sensor-based exact celldecompositionoftheareaaidsinthepartitioningprocess,whichisperformedintwosteps. Inthe first step, a growing regions algorithm performs an isotropic partitioning of the area based on the initial locations of the UAVs and their relative capabilities. Then, two novel algorithms are applied to compute an adjustment of this partitioning process, in order to solve deadlock situations that generate non-allocated regions and sub-areas above or below the relative capabilities of the UAVs. Finally, realistic simulations have been conducted for the evaluation of the proposed solution, and the obtained results show that these algorithms can compute valid and sound solutions in complex coastal region scenarios under different setups for the UAVsMinisterio de Economía, Industria y Competitividad DPI2014-C2-1-
Distributed approach for coverage and patrolling missions with a team of heterogeneous aerial robots under communication constraints
Using aerial robots in area coverage applications
is an emerging topic. These applications need a coverage
path planning algorithm and a coordinated patrolling
plan. This paper proposes a distributed approach to
coordinate a team of heterogeneous UAVs cooperating
efficiently in patrolling missions around irregular areas,
with low communication ranges and memory storage
requirements. Hence it can be used with small‐scale
UAVs with limited and different capabilities. The
presented system uses a modular architecture and solves
the problem by dividing the area between all the robots
according to their capabilities. Each aerial robot performs
a decomposition based algorithm to create covering paths
and a ’one‐to‐one’ coordination strategy to decide the
path segment to patrol. The system is decentralized and
fault‐tolerant. It ensures a finite time to share
information between all the robots and guarantees
convergence to the desired steady state, based on the
maximal minimum frequency criteria. A set of
simulations with a team of quad‐rotors is used to
validate the approach
Sinking of light intruders in a shaken granular bed
We present an experimental study of the displacement of a light intruder immersed in a vibrated granular
bed. Using high speed video we resolve the motion, during one cycle of oscillation, of a cylindrical object
inside a Plexiglas box partially filled with grains. We report experimental evidence that, in the absence of
convection, at least two forces are behind the intruder’s motion: an air drag force—due to the airflow through
the granular bed—and a buoyancy force produced by an air-mediated granular fluid
Closed-Loop Behavior of an Autonomous Helicopter Equipped with a Robotic Arm for Aerial Manipulation Tasks
This paper is devoted to the control of aerial robots interacting physically with objects in the environment and
with other aerial robots. The paper presents a controller for the particular case of a small‐scaled autonomous helicopter equipped with a robotic arm for aerial manipulation.
Two
types
of
influences
are
imposed
on
the
helicopter
from
a
manipulator:
coherent
and
non
‐
coherent
influence.
In
the
former
case,
the
forces
and
torques
imposed
on
the
helicopter
by
the
manipulator
change
with
frequencies
close
to
those
of
the
helicopter
movement.
The
paper
shows
that
even
small
interaction
forces
imposed
on
the
fuselage
periodically
in
proper
phase
could
yield
to
low
frequency
instabilities
and
oscillations,
so
called
phase
circle
An efficient distributed area division method for cooperative monitoring applications with multiple uavs
This article addresses the area division problem in a distributed manner providing a solution for cooperative monitoring missions with multiple UAVs. Starting from a sub-optimal area division, a distributed online algorithm is presented to accelerate the convergence of the system to the optimal solution, following a frequency-based approach. Based on the “coordination variables” concept and on a strict neighborhood relation to share information (left, right, above and below neighbors), this technique defines a distributed division protocol to determine coherently the size and shape of the sub-area assigned to each UAV. Theoretically, the convergence time of the proposed solution depends linearly on the number of UAVs. Validation results, comparing the proposed approach with other distributed techniques, are provided to evaluate and analyze its performance following a convergence time criterion.European Union’s Horizon 2020 AERIAL-CORE Project Grant 871479CDTI (sPAIN) “Red Cervera” Programme iMOV3D Spanish R&D projec
A Robust Head Tracking System Based on Monocular Vision and Planar Templates
This paper details the implementation of a head tracking system suitable for its use in teleoperation stations or control centers, taking into account the limitations and constraints usually associated to those environments. The paper discusses and justifies the selection of the different methods and sensors to build the head tracking system, detailing also the processing steps of the system in operation. A prototype to validate the proposed approach is also presented along with several tests in a real environment with promising results
Morphological quality in moringa (Moringa oleifera Lam.) Seedlings produced in substrates composed of soil and animal manure
With the objective of evaluating the morphological quality of moringa seedlings produced in substrates composed of soil with a sandy loam texture and dry and sifted manure of cattle, sheep, pigs, horses, cunicultural, chicken and hen manure, mixed in a 2: 1 ratio (v/v), respectively, and previously characterized physically and chemically, an experiment was conducted in the cultivation house, in the design of randomized blocks with seven treatments, three repetitions, 18 seedlings per experimental unit and four useful seedlings. The speed index (IVE) and total emergency percentage (PE), the evolution of the slenderness index and final slenderness index in the seedlings and other quality indices corresponding to fresh aerial and root biomass at 42 days after sowing were quantified. The quantified variables were processed by Friedman's test and analysis of variance and compared by sum of orthogonal ranges and contrasts at 5% significance. The quantified variables were processed by Friedman's test and analysis of variance and compared by sum of orthogonal ranges and contrasts at 5% significance. For both the IV and the PE, the substrates based on pig, equine and bovine manure had the highest values, while the substrates with chicken and hen manure were not adequate. The evolutionary curves of the slenderness index in the substrates with pig and cunicultural manure maintained a sustained air growth rate. The soil - pig manure substrate was the best option for raising moringa in nursery conditions. The Dickson index, allowed to indicate quality for moringa seedlings in nursery conditions.Con el objetivo de evaluar la calidad morfológica de plántulas de moringa producidas en sustratos compuestos por suelo de textura areno francosa y estiércol seco y tamizado de bovino, ovino, porcino, equino, cunícola, pollinaza y gallinaza, mezclados en proporción 2:1 (v/v), respectivamente, y previamente caracterizados física y químicamente; se condujo un experimento en casa de cultivo, en el diseño de bloques al azar con siete tratamientos, tres repeticiones, 18 plántulas por unidad experimental y cuatro plántulas útiles. Se cuantificó el índice de velocidad y el porcentaje total de emergencia (IVE y PE respectivamente), la evolución del índice de esbeltez e índice de esbeltez final en las plántulas y otros índices de calidad correspondiente a biomasa fresca aérea y radicular a los 42 días después de la siembra. Las variables cuantificadas fueron procesadas por prueba de Friedman y análisis de varianza y comparadas mediante suma de rangos y contrastes ortogonales al 5% de significancia. Tanto para el IVE como para el PE, los sustratos a base de estiércol porcino, equino y bovino presentaron los valores más elevados, mientras los sustratos con pollinaza y gallinaza no resultaron adecuados. Las curvas evolutivas del índice de esbeltez en los sustratos con estiércol porcino y cunícola mantuvieron ritmo de crecimiento aéreo sostenido. El sustrato suelo - estiércol porcino resultó la mejor opción para la crianza de moringa en condiciones de vivero. El índice de Dickson, permitió indicar calidad para las plántulas de moringa en condiciones de vivero
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