41,775 research outputs found
Constructing Sobol' sequences with better two-dimensional projections
No full textDirection numbers for generating Sobol' sequences that satisfy the so-called Property A in up to 1111 dimensions have previously been given in Joe and Kuo [ACM Trans. Math. Software, 29 (2003), pp. 49–57]. However, these Sobol' sequences may have poor two-dimensional projections. Here we provide a new set of direction numbers alleviating this problem. These are obtained by treating Sobol' sequences in d dimensions as (t, d)-sequences and then optimizing the t-values of the two-dimensional projections. Our target dimension is 21201
Measurement and Assessment of Testing-Effort Dependent Software Reliability Growth Models
No full textMisuse of Kuo–Eliassen equation in studies of the climatological mean meridional circulation
No full textThe Kuo–Eliassen equation provides the mean meridional circulation that must be present for the axisymmetric component of a flow forced by heat and momentum sources to remain balanced as it evolves. It does not tell us whether or not the flow is steady. Using this equation to explain how the mean meridional circulation is perturbed due to a change in thermal or momentum forcing, including the forcing due to large-scale eddies, requires a division of the forcing into prescribed and reactive parts and, most importantly, a physical theory for the latter. It should not be used without explicit discussion of the assumptions being made about the reactive component of the forcing and justification for the choice being made.National Science Foundation (NSF)Depto. de Física de la Tierra y AstrofísicaFac. de Ciencias FísicasTRUEpu
Genotoxic and non-genotoxic effects of betel quid ingredients on oral mucosal fibroblasts in vitro
No full textInhibition of the TPA-Inducedprotein Kinase C and Proto-Oncogene Expression in NIH 3T3 Cells by Apigenin
No full textRapid and specific detection of the leukotoxin sequences of Actinobacillus actinomycetemcomitans from periodontal pockets by the polymerase chain reaction
No full textMulti-compartment waste collection vehicle routing problem with bin washer
Get PDFThis paper introduces a new variant of the Multi-Compartment Waste Collection Problem (MCWCP), which we call the MC-WCP with Bin Washer (MC-WCP-BW). The problem involves a fleet of compressed refuse collection trucks equipped with a bin washer, which compresses each waste type in the corresponding compartment of the vehicle. The vehicles can also wash the bins. Separation sites and water refilling stations are considered in the problem. A subset of the bins must be washed when emptied, which is not mandatory for the others. The problem is modeled using a mixed-integer linear programming formulation incorporating multiple visits to separation sites and water refilling stations. An efficient Hybrid Variable Neighborhood Search (HVNS) algorithm is developed and evaluated on a set of instances from the literature and newly generated instances. Computational experiments show that our proposed algorithm can identify solutions of better quality in a shorter computational time, as compared with the current state-of-the-art algorithms. The potential benefits of the compaction operation under several scenarios are also examined via extensive analyses
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