Ju-Hsien Kao

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New additive-subtractive processes promise to enhance SFF capability from prototyping to true low-volume production. However, to maintain the same degree of process automation as in currently available processes like SLA or SLS, more sophisticated planning and execution systems need to be developed. The system we present in this paper consists of two parts.(More)
The new additive/subtractive technology (Shape Deposition Manufacturing) enhances Solid Freeform Fabrication (SFF) capability in producing near net-shape surface finish. This technology also builds parts in fewer layers compared with conventional layered manufacturing technology. However, to decompose a part into freeform layers usually requires expensive(More)
Mold SDM is an additive-subtractive layered manufacturing process that builds fugitive wax molds for use in secondary processes, such as gelcasting. Several build techniques have been developed to improve part quality and process efficiency. By decomposing models into non-planar layers surface quality is improved and fewer layers are required. The range of(More)
Combining the advantages of layered manufacturing and material removal processes, additive/subtractive solid freeform fabrication (A/S SFF) can build parts with complex shapes without compromising precision requirements. However, preparing material removal operations requires special expertise, which has in fact become one of the bottlenecks of the A/S SFF(More)
Flow control monitor is relating to huge amount of flight data processor (FDP) and radar data processor (RDP) message to any en-route center. Under current high flow density situations, most major airports have encountered flow control problem. Approach queuing based on the estimated time of arrival (ETA) from FDP and revised by RDP on the metering fixes in(More)
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