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LoRa, an emerging wireless technology, is examined for long range communication performance in a large area. Although LoRa shows good performance for long-distance transmission in the countryside, its radio signals can be attenuated and interfered with by buildings, trees and other signal sources. In urban areas, our observation shows that LoRa requires a dense deployment of LoRa gateways to ensure...
Combat capability assessment of strategic missiles systems is an important component of national security strategic decision-making. In view of the drawbacks existing in current system modelling methods, assessment indicators and assessment approaches, a model of combat system based on the operation loops is constructed. According to the system model and weapon properties, this paper proposes the...
This paper introduces a tunnel procedure based on the virtual network card. The data through the tunnel are encrypted by using the open source library OpenSSL. Through this program we can implement an intelligent home control center VPN system base on Android that can protect the information which collected by wireless sensors at home on the Internet.
In this paper, we propose a virtualization architecture for the multi-core embedded system to provide more sys-tem reliability and security while maintaining the same performance without introducing additional special hardware supports or having to implement complex protection mechanism in the virtualization layer. Embedded virtualization design usually uses two kinds of approaches, traditional VMM...
In this paper, we propose a virtualization architecture for the multi-core embedded system to provide more system reliability and security while maintaining the same performance without introducing additional special hardware supports or having to implement complex protection mechanism in the virtualization layer. Virtualization has been widely used in embedded systems, especially in consumer electronics,...
Vertical-cavity lasers with strained active regions show increased modulation rates and reliability at lower power dissipation. However, their longer wavelength (980-1100 nm) than the standard 850 nm has inhibited their widespread adoption. Given the huge emerging markets for high-speed, high-efficiency data links, should this inhibition be overcome?
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