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Through studying the transportation and vibration of drilling pressure fluctuation in drill stem, mathematical models between pressure flow and time distance are established, the differential equations corresponding to the above-mentioned variables are deduced and general solutions of differential equations are obtained. By analyzing the transferring mode of power transmission signals and describing...
This paper demonstrates a novel device using TLM (transmission line model) method to shorten the operation time of specific contact resistance measurement. It takes about 1 min for each measurement point, and obtaining full-scale solar cell mapping is achievable in an acceptable time. The mappings of emitter sheet resistance and specific contact resistance are obtained on 125×125 mm size solar cells...
In the process of aero-equipment design and manufacturing, mean time to repair (MTTR) is one of important maintainability parameters and it is required to conduct maintenance evaluation so as to verify equipment maintainability requirement. According GJB 2072 and MIL-STD-471 for aero-equipment maintenance evaluation, the number of samples should be no less than 30. However, it is almost impossible...
Data aggregation is a crucial technique for energy constrained sensor networks. Previous researches on data aggregation are featured as query-oriented, which only provide partial information of the event happened in the deployment area at the base station. In this paper, we propose an event-oriented data aggregation approach, called EDA. EDA presents the distributed algorithm by exploiting Cloud Membership...
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