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In the study of opportunistic network, the design of mobile model directly affects the architecture of opportunistic network and the efficiency of routing algorithm. On the discussion of human movement characteristics, this paper analyzed the characteristics of students' movement in campus environment and presented a campus mobile model based on periodic purpose, Periodical-Purpose Campus Mobility...
The paper puts forward a reverse comprehensive analysis model that can improve the reliability of embedded software with SFMEA and SFTA. First, it adopts SFTA to build software fault analysis tree; Second, it makes severity level definition list according to fault mode; Finally it lists the fault analysis results with SFMEA, then summarizes several important links in software designing and proposes...
The objective of this study is to investigate the effects of respiratory motion (RM) on defect detection in Tc-99m sestamibi myocardial perfusion SPECT (MPS) using a phantom population that includes patient variability. Three RM patterns are included, namely breath-hold, slightly enhanced normal breathing, and deep breathing. For each RM pattern, six 4-D NCAT phantoms were generated, each with anatomical...
Biological systems exhibit remarkable adaptation and robustness in the face of widely changing environments. Currently speaking, we often imitate the properties of biological systems. Based on this thought, it also exists the analogous situation in the WSNs (wireless sensor networks). Survivability is the ability to provide essential services in the presence of attacks and failures, and recover full...
In error-prone channel with low SNRs, the network throughput may drop significantly if the packet length becomes too large. On the other hand, too much protocol overhead will be introduced if the packet length is too small. In this paper, we study this tradeoff and propose an adaptive frame size algorithm for A-MPDU in 802.11n networks, which can maximize the throughput by selecting the optimized...
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