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Self-organized TDMA (STDMA) has been proposed as a medium access control (MAC) protocol for Vehicle-to-Vehicle (V2V) communication. Although it avoids the unbounded channel access delay faced by other CSMA-based protocols, the reliability in high traffic density is still unsatisfactory for critical road safety applications. This paper introduces an enhanced prediction-based STDMA protocol which utilizes...
We investigate the amount of radio spectrum re- quired for reliable vehicle-to-vehicle (V2V) communication for traffic safety. The basic feature of the traffic safety application is that it uses periodical broadcasts of status messages containing the location and velocity of transmitting vehicles. In our study we consider two dominant technologies for V2V communication, namely IEEE 802.11p and self-organizing...
Though there exist ready-made DSRC/WiFi/3G/4G cellular systems for roadway communications, there are common defects in these systems for roadway safety oriented applications and the corresponding challenges remain unsolved for years, i.e., WiFi cannot work well in vehicular networks due to the high probability of packet loss caused by burst communications, which is a common phenomenon in roadway networks;...
Instead of constructing new nuclear power plant, nuclear power has been shifted to expand the lifetime of nuclear power plant according to the condition of safety and reliability around the world. In order to achieve the goal of life extension, it is important for the nuclear power plants to focus on the life cycle management of critical equipment. LEA (Life Economic Analysis), the core work of life...
The effects of multiple reflows and thermal shock on interfacial reaction of the solder joints between Sn-0.3Ag-0.7Cu solder/pads (HASL, OSP, electrolytic Ni/Au and ENIG PCB finishes) were systematically investigated in this work. The results showed that the scallop Cu6Sn5 phase were formed in HASL and OSP finish pads during reflows, whereas the cylinder-type (Cu, Ni)6Sn5 near the solder and needle-type...
RS422/485 serial bus is widely used in embedded systems for the medium and long-distance data communication. In this paper, the main technologies of RS422/485 bus application in embedded system such as topology, cabling network matching, over-voltage transient protection, earth technology, failure protection and deadlock are elaborated in detail first, then a specific example of embedded access system...
A major challenge in the post-genomic era is to determine protein function on a proteomic scale. There are only less than half of the actual functional annotations available for a typical proteome. The recent high-throughput bio-techniques have provided us large-scale protein-protein interaction data, and many studies have shown that function prediction from protein-protein interaction data is a promising...
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