This paper tackles the problem of forecasting real-life crime. However, the recollected data only produced thirty-five short-sized crime time series for three urban areas. We present a comparative analysis of four simple and four machine-learning-based ensemble forecasting methods. Additionally, we propose five forecasting techniques that manage the seasonal component of the time series. Furthermore, we used the symmetric mean average percentage error and a Friedman test to compare the performance of the forecasting methods and proposed techniques. The results showed that simple moving average with seasonal removal techniques produce the best performance for these series. It is important to highlight that a high percentage of the time series has no auto-correlation and a high level of symmetry, which is deemed as white noise and, therefore, difficult to forecast.

High-Performance Computing systems rely on the software’s capability to be highly parallelized in individual computing tasks. However, even with a high parallelization level, poor scheduling can lead to long runtimes; this scheduling is in itself an NP-hard problem. Therefore, it is our interest to use a heuristic approach, particularly Cellular Processing Algorithms (CPA), which is a novel metaheuristic framework for optimization. This framework has its foundation in exploring the search space by multiple Processing Cells that communicate to exploit the search and in the individual stagnation detection mechanism in the Processing Cells. In this paper, we proposed using a Greedy Randomized Adaptive Search Procedure (GRASP) to look for promising task execution orders; later, a CPA formed with Iterated Local Search (ILS) Processing Cells is used for the optimization. We assess our approach with a high-performance ILS state-of-the-art approach. Experimental results show that the CPA outperforms the previous ILS in real applications and synthetic instances.

Electricity is one of the most important resources for the growth and sustainability of the population. This paper assesses the energy consumption and user satisfaction of a simulated air conditioning system controlled with two different optimization algorithms. The algorithms are a genetic algorithm (GA), implemented from the state of the art, and a non-dominated sorting genetic algorithm II (NSGA II) proposed in this paper; these algorithms control an air conditioning system considering user preferences. It is worth noting that we made several modifications to the objective function’s definition to make it more robust. The energy-saving optimization is essential to reduce CO2 emissions and economic costs; on the other hand, it is desirable for the user to feel comfortable, yet it will entail a higher energy consumption. Thus, we integrate user preferences with energy-saving on a single weighted function and a Pareto bi-objective problem to increase user satisfaction and decrease electrical energy consumption. To assess the experimentation, we constructed a simulator by training a backpropagation neural network with real data from a laboratory’s air conditioning system. According to the results, we conclude that NSGA II provides better results than the state of the art (GA) regarding user preferences and energy-saving.

México se encuentra entre los países con mayor prevalencia de sobrepeso y obesidad entre los niños y adolescentes. Por tanto, surge la necesidad de una técnica económica, rápida, reproducible y de fácil implementación que permita detectar tempranamente en el ámbito escolar el sobrepeso y la obesidad en niños y adolescentes. En este trabajo se presenta una técnica que cumple con esas expectativas basada en un modelo de inferencia difuso con un conjunto de 81 reglas para la clasificación de la composición corporal de 92 niñas y 88 niños entre las edades de 10 y 14 años. Como atributos se tomaron, el peso, el índice de masa corporal, el porciento de masa grasa y el porciento de peso habitual. Para cada atributo se definieron tres conjuntos difusos, normal, sobrepeso y obeso y para clasificar el valor del atributo se usaron las referencias que más se utilizan en la literatura y por los nutriólogos y pediatras de la zona de estudio. Como resultado de la aplicación del modelo difuso, se obtuvo una precisión promedio de 97,6% con un 4,2% de error para la clasificación corporal de las niñas y de 93,4% con un 4,6% de error para niños.