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The problem of connectivity in heterogeneous networks constitutes an important yet challenging topic in the literature of communication networks. A heterogeneous network contains nodes with different communication radii and degrees of connectivity. This paper addresses the problem of connectivity in multi-tier heterogeneous network graphs through systematic placement of advantaged nodes. The node...
With the development of network especially the internet technology, the communication between spacecraft and ground station based on network is becoming a hot research topic. In order to link terminals between space and ground, a network architecture according to the characteristics of the RF links between space and ground, is given in this paper, which is mainly base on the IP over CCSDS protocol...
Alpha-fetoprotein (AFP) is a typical tumor marker in early diagnosis. Highly specific detection of the AFP was demonstrated using AlGaAs/GaAs high electron mobility transistors (HEMTs). Anti-AFP antibody was immobilized to the Au-coated gate area of the HEMT by a covalent modification method. To avoid any nonspecific binding, the gate was blocked by bovine serum albumin after the reduction of the...
The specific application of power devices has imposed the requirement for intensive investigation of their reliability. In this paper we have investigated the reliability and failure mechanism of power VDMOS. In constant-stress accelerated life test, the three different temperatures (150degC, 165degC and 180degC) are imposed on the devices. Under the bias VDS=7.5V, IDS=0.8A, and the channel temperature...
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