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Design optimization of multilayer perceptron neural network by ant colony optimization applied to engine emissions data

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Science China(Technological Sciences) 2019年第6期62卷 1055-1064页

作者： MARTINEZ-morales Jose QUEJ-COSGAYA hector LAGUNAS-JIMENEZ Jose PALACIOS-HERNANDEZ Elvia morales-SALDANA Jorge Faculty of Engineering Autonomous University of Campeche Campeche 24039 Mexico Faculty of Sciences Autonomous University of San Luis Potosi San Luis Potosi 78290 Mexico Faculty of Engineering Autonomous University of San Luis Potosi San Luis Potosi 78290 Mexico

A multilayer perceptron(MLP) artificial neural network(ANN) model has been optimized by the multi-objective ant colony optimization(MOACO) algorithm, which uses three objective functions. A sensitivity analysis to choose MOACO parameter values is carried out by calculating hypervolume metric, and the proposed approach adopts the Vlsekriterijumska Optimizacija I Kompromisno Resenje(VIKOR) decision method to choose final compromised solution on the Pareto front obtained from MOACO. As a result, we used the MLP-MOACO developed model to estimate the value of engine emissions of NOxin a four stroke, spark ignition(SI) gasoline engine and observed acceptable correlation coefficient(R^2) of 0.99978.

关键词： ant colony optimization multilayer perceptron artificial neural networks hypervolume engine emissions

Gene transcription profiting of astheno-and normo-zoospermic sperm subpopulations

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Asian Journal of Andrology 2020年第6期22卷 608-615页

作者： Pedro Caballero-Campo Saul Lira-Albarran David Barrera Elizabeth Borja-Cacho hector S Godoy-morales Claudia Rangel-Escareno Fernando Larrea Mayel Chirinos Department of Reproduction Biology National Institute of Medical Sciences and Nutrition Salvador ZubiranMexico City 14080Mexico Tambre Foundation Madrid 28002Spain Reproductive Medicine Unit Angeles del Ped regal HospitalMexico City 10700Mexico Computational Genomic and Integrative Biology Laboratory National Institute of Genomic MedicineMexico City 14610Mexico

Spermatozoa contain a repertoire of RNAs considered to be potential functional fertility *** this study,the gene expression of human sperm subpopulations with high(F1)and low(F2)motility from healthy normozoospermic(N)and asthenozoospermic(A)individuals was evaluated using RNA microarray followed by functional genomic analysis of differentially expressed *** from A-F1 versus N-F1,A-F2 versus N-F2,N-F1 versus N-F2,and A-F1 versus A-F2 comparisons showed a considerably larger set of downregulated genes in tests versus *** ontology(GO)analysis of A-F1 versus N-F1 identified 507 overrepresented biological processes(BPs),several of which are associated with sperm *** addition,gene set enrichment analysis of the same contrast showed 110 BPs,36 cellular comp on ents,and 31 molecular functions,several of which are involved in sperm motility.A leadi ng・edge analysis of selected GO terms resulted in several down regulated genes encoding to dyn eins and kin esins,both related to sperm ***,the predicted activation state of asthenozoospermia was increased,while fertility,cell movement of sperm,and gametogenesis were ***,several downregulated genes characteristic of the canonical pathway protein ubiquitination were involved in asthenozoospermia ***,GO analysis of A-F2 versus N-F2 did not identify overrepresented BPs,although the gene set enrichment analysis detected six enriched BPs,one cellular component,and two molecular ***,the results show differences in gene transcription between sperm subpopulations from asthenozoospermic and normozoospermic semen samples and allowed the identification of gene sets relevant to sperm physiology and reproduction.

关键词： asthenozoospermia male in fertility microarray sperm transcriptome

Photomechanical Ablation of 304L Stainless Steel, Aluminum Oxide (Al₂O₃) Thin Film, and Pure Silicon

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Optics and Photonics Journal 2016年第10期6卷 275-288页

作者： Gabriel de la Rosa-Santana Jose Alfredo Alvarez-Chavez hector R. Morano-Okuno Angel J. morales-Ramirez Esmeralda Uribe Instituto Tecnologico y de Estudios Superiores de Monterrey Campus Estado de Mexico Atizapan de Zaragoza Mexico Instituto Politecnico Nacional-Centro de Investigacion e InnovacionTecnologica (CIITEC-IPN) Mexico City Mexico Instituto Tecnologico y de Estudios Superiores de Monterrey Campus Queretaro Santiago de Queretaro Mexico

Recently, a number of studies have focused on micro-manufacturing processes, which find use in a variety of applications, including the production of microelectromechanical systems (MEMS). The process of ablation in materials is mainly governed by the laser source and scanning speed. The rate of material ablation is influenced by chemical and physical properties. In this work, the energy from a CO2 laser was used to ablate three different materials, namely, stainless steel 304L, a thin film of amorphous aluminum oxide (Al2O3), and pure silicon, due to their wide use in MEMS technology. The laser parameters used were an average power of 18 W and a spot size of 200 μm. The maximum depth during the photomechanical ablation process was 72 μm in the case of 304L steel and 77 μm in the case of the Al2O3 thin film for a scan rate of 24 mm/min. However, at the same scan rate, silicon did not exhibit any penetration. As expected, while increasing scanning speed the ablation depth decreases due to reduced interaction time between laser and material. The theoretical ytterbium fiber laser shown in this study can thus be employed in the manufacturing of a wide variety of materials used in the production of MEMS as well as those used in clean energy technologies.

关键词： Laser Ablation MEMS Ytterbium-Doped Fiber Laser Thin Film

Gastric trichobezoar associated with perforated peptic ulcer and Candida glabrata infection

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World Journal of Clinical Cases 2014年第12期2卷 918-923页

作者： Héctor losada morales Cecilia Huenchullán Catalán Rodrigo Arriagada Demetrio Macarena Espinoza Rivas Natalia Castagnoli Parraguez Martín Alanis Alvarez Cirugía Hepato-pancreática y Biliar Departamento de Cirugía Clínica Alemana de Temuco Temuco 4810297 Chile Cirugía Hepato-pancreática y Biliar Departamento de Cirugía y Traumatología Universidad de La Frontera Temuco 4781218 Chile Departamento de Imágenes Clínica Alemana de Temuco Temuco 4810297 Chile Departamento de Ginecología y Obstetricia Clínica Alemana de Temuco Temuco 4810297Chile

Bezoars are accumulations of human or plant fiber located in the gastrointestinal tract of both humans and animals. Patients remain asymptomatic for several years, and the symptoms develop as these accumulations increase in size to the point of obstruction or perforation. We report the case of a 21-year-old patient at 10 d postpartum, who presented with acute abdomen associated with sepsis. Given the urgency of the clinical picture, at no point was the presence of a giant bezoar at gastric level suspected, specifically a trichobezoar. The emergency abdominal and pelvic ultrasound revealed only unspecific signs of perforated hollow viscus. Diagnosis was therefore made intraoperatively. A complete gastric trichobezoar was found with gastric perforation and secondary peritonitis. The peritoneal fluid culture revealed Candida glabrata.

关键词： Bezoar Postpartum period Acute abdomen