111 research outputs found
Hybrid conjugate gradient-BFGS methods based on Wolfe line search
No full textIn this paper, we present some hybrid methods for solving unconstrained optimization problems. These methods are defined using proper combinations of the search directions and included parameters in conjugate gradient and quasi-Newton method of Broyden–Fletcher–Goldfarb–Shanno (CG-BFGS). Their global convergence under the Wolfe line search is analyzed for general objective functions. Numerical experiments show the superiority of the modified hybrid (CG-BFGS) method with respect to some existing methods.
Mathematics Subject Classification (2010): 65K05, 90C26, 90C30.
Received 23 December 2019; Accepted 08 February 2020
Human Capital Development and Its Effect on Economic Growth in Algeria : Lessons to learn from South Korea
No full textLife-Span Developmental Psychology: Midlife and Later Years in Western and Non-Western Societies
No full textThis chapter discusses the basis on which studies have been done on the later years of life in Western and non-Western cultures. It suggests that because Westerners value independence, most research on aging in Western societies has focused on how to help the individual maintain his or her functional independence throughout the life-span. Non-Westerners, on the other hand, value interdependence. Therefore, most research on aging has focused on the availability of social support in later life. But with Westernization influences in non-Western societies, there should be a shift in research efforts in order to accommodate a new understanding of aging and human development that includes the promotion of functional independence in later life
Published Authors, Poets will Read During UD\u27s First Literary Fest, Featuring Book Sale and Children\u27s Activities
No full textNews release announces Author Samia Serageldin will join poets and writers from the Miami Valley in helping launch the University of Dayton\u27s first literary festival
Samia cynthia versus Bombyx mori : Comparative gene mapping between a species with a low-number karyotype and the model species of Lepidoptera
No full textWe performed gene-based comparative FISH mapping between a wild silkmoth, Samia cynthia ssp. with a low number of chromosomes (2n = 25-28) and the model species, Bombyx mori (2n = 56), in order to identify the genomic components that make up the chromosomes in a low-number karyotype. Mapping of 64 fosmid probes containing orthologs of B. mori genes revealed that the homologues of either two or four B. mori chromosomes constitute the S. c. ricini (Vietnam population, 2n = 27♀/28♂, Z0/ZZ) autosomes. Where tested, even the gene order was conserved between S. c. ricini and B. mori. This was also true for the originally autosomal parts of the neo-sex chromosomes in S. c. walkeri (Sapporo population, 2n = 26♀/26♂, neo-Wneo-Z/neo-Zneo-Z) and S. cynthia subsp. indet. (Nagano population, 2n = 25♀/26♂, neo-WZ1Z2/Z1Z1Z2Z2). The results are evidence for an internal stability of lepidopteran chromosomes even when all autosomes had undergone fusion processes to form a low-number karyotype
Poets, Books and More at First UD Literary Test
No full textNews release announces that author Samia Serageldin and more than 20 poets and writers from the Miami Valley will read from their works during the University of Dayton\u27s first literary festival
New hybrid conjugate gradient method for nonlinear optimization with application to image restoration problems
No full textsummary:The conjugate gradient method is one of the most effective algorithm for unconstrained nonlinear optimization problems. This is due to the fact that it does not need a lot of storage memory and its simple structure properties, which motivate us to propose a new hybrid conjugate gradient method through a convex combination of and . We compute the convex parameter using the Newton direction. Global convergence is established through the strong Wolfe conditions. Numerical experiments show the superior efficiency of our algorithm to solve unconstrained optimization problem compared to other considered methods. Applied to image restoration problem, our algorithm is competitive with existing algorithms and performs even better when the level of noise in the image is significant
Hydraulic simulations to evaluate and predict design and operation of the Chashma Right Bank Canal
No full textIrrigation systems / Irrigation canals / Flow control / Velocity / Canal regulation techniques / Hydraulics / Simulation models / Design / Operations / Crop-based irrigation / Distributary canals / Water delivery / Policy / Protective irrigation / Water allocation / Water requirements / Sedimentation / Water distribution / Equity / Water conveyance / Pakistan / Chashma Right Bank Canal
What’s missing in model-based teaching?
No full textIn this study, the author investigated how four science teachers employed model-based teaching (MBT) over a 1-year period. The purpose of the research was to develop a baseline of the fundamental and specific dimensions of MBT that are present and absent in science teaching. Teacher interviews, classroom observations, and pre and post-student assessments were gathered. Using a Generate-Evaluate-Modify framework as a theoretical guide, the author identified three fundamental aspects of MBT that were not apparent in an analysis of the teaching methods. Drawing on these findings, the author hypothesizes the consequent impact of the absence of these aspects on MBT on students’ experiences and performance in science. Implications for core science teacher professional development activities on MBT are discussed
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