686 research outputs found
Oscillate Boiling from Electrical Microheaters
Oscillate boiling offers excellent heat transfer at temperatures above the
Leidenfrost temperature. Here we realize an electrical microheater with an
integrated thermal probe and resolve the thermal cycle during the
high-frequency bubble oscillations. Thermal rates of K/s were found
indicating its applicability for compact and rapid heat transfer from micro
electrical devices
ANALYSIS ON THE EFFECT OF CURRICULUM IDEOLOGICAL AND POLITICAL CONCEPT ON ALLEVIATING ADOLESCENT ANXIETY IN THE TEACHING OF “CIRCUIT” SPECIALTY
Modeling Spare Parts Demands Forecast under Two-Dimensional Preventive Maintenance Policy
In maintenance practice, there is such a situation where the spare parts replacement should be carried out at the scheduling time of calendar or usage for whichever comes first. The issue of two-dimensional preventive maintenance usually was not addressed by traditional methods, and at present, few studies were focused on this very topic. Based on these considerations, this paper presented the two-dimensional preventive policy where replacements of spare parts are based on both calendar time and usage time. A novel model was developed to forecast spare parts demands under two-dimensional preventive maintenance policy, and a discrete algorithm was presented for solving the mathematical model. A case study was given to demonstrate its applicability and validity, and it was showed that the presented model can be used to forecast spare parts demands as well as to optimize spare parts and preventive maintenance jointly
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