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Due to the demands of the market, high density and low profile packaging options of small packaging are continuously developed. As high density packaging technologies such as Molded Underfill (MUF) on flip chip package are usually used due to its simplification of assembly process steps and the saving of the cost. For MUF process, in order to ensure void free package, it is often constructed a vacuum...
On-line monitoring of dissolved gas in oil is one of effective methods of condition assessment of transformers. Compared with the power transformer, valve side windings of converter transformer withstand pulsating voltage during the converter process. This paper presents gas generation properties of oil insulation under pulsating voltages, which are different from those under individual AC voltage...
In this paper, the fusion scheme at feature level is brought forward by using both air-borne imaging and electronic reconnaissance information, the author not only gives the structure of whole scheme but expound realization of several pivotal steps in detail. Moreover, the author analyzes the rationality of construction for fusion scheme and advantage of fusion results by making best use of mutual...
Based on the analysis of MC-CDMA signal transmitting model and VHF aeronautical channel model, the performance of MC-CDMA system in VHF aeronautical channel is studied and simulated. VHF aeronautical communication band is congested and with serious multi-path fading and channel delay. Combining and benefiting from OFDM and CDMA technology, MC-CDMA can eliminate the interference caused by multi-path...
In order to improve the reliability and matching precision of image matching navigation system, a novel filtering and fusion algorithm for sequence image matching is proposed. The essence of the matching results filtering and fusion problems for aircraft matching navigation system is firstly analyzed. Then, a new Windows Median Filter (WMF) is designed to filtering the longitudinal matching position...
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