11,733 research outputs found
Risk assessment of active smoking: smoking-attributable mortality and years of potential life lost in Taiwan, 1980 and 1992
No full textA Gemoetrical Approach to Computing Expected Cycle Times for Class-Based Storage Layouts in AS/RS
Full text linkAn exact, geometry-based analytical model is presented that can be used to compute the expected cycle time for a storage/retrieval (S/R) machine, executing single-commands, dual-commands, or both, in a rack structure that has been laid out in pre-specified storage zones for classes of goods.The rack may be either square-in-time or non-square-in-time.The approach is intuitively appealing, and it does not assume any certain layout shape, such as traditional "L-shaped" class layouts.The model has been coded in Turbo Pascal, and can be used by designers as a tool for quickly evaluating alternative layout configurations with respect to expected S/R cycle time in an AS/RS, and thereby the throughput of an automated warehouse over time.This model has been successfully applied in a major manufacturing plant in Europe to evaluate reconfigurations of their rack storage layouts over the past five years.Automated storage and retrieval systems;AS/RS;class-based storage.
Optimal Storage Rack Design for a 3-dimensional Compact AS/RS
Full text linkIn this paper, we consider a newly-designed compact three-dimensional automated storage and retrieval system (AS/RS). The system consists of an automated crane taking care of movements in the horizontal and vertical direction. A gravity conveying mechanism takes care of the depth movement. Our research objective is to analyze the system performance and optimally dimension of the system. We estimate the crane’s expected travel time for single-command cycles. From the expected travel time, we calculate the optimal ratio between three dimensions that minimizes the travel time for a random storage strategy. In addition, we derive an approximate closed-form travel time expression for dual command cycles. Finally, we illustrate the findings of the study by a practical example.AS/RS;Warehousing;Order Picking;Travel Time Model;Compact Storage Rack Design
A validity analysis of residential magnetic fields estimated from high-voltage transmission lines
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Bird species richness patterns of northern Taiwan: primary productivity, human population density, and habitat heterogeneity.
No full textastromatt42/digb_sfgs: Release for 10.21203/rs.3.rs-106679/v1
No full textThis release was used to compute the results in https://doi.org/10.21203/rs.3.rs-106679/v1
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Origin of superconductivity suppression in (Dy1-xPrx)Ba2Cu3O7 studied by soft-x-ray absorption spectroscopy
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