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The near field of two typical cassegrain dual-reflector antennas which are extensively used in the aerospace field, is simulated by using the software FEKO. The electrical field strength and the equivalent near-field gain in the Fresnel region are obtained. On this basis, this paper presents a rapid estimation method of equivalent near-field gain which merely uses the far-field radiation pattern....
This paper mainly introduces OpenADR(Open automatic demand response) transfer agreement. At the same time, this paper will introduce a new concept of wireless transmission in this protocol. The thesis also introduces the contents of protocol, such as the transfer mechanism and interactive mode. In this article, we based on OMNeT + + software to simulate the protocol communication behavior.
A vehicle control system based on Bluetooth 4.0 on smartphone platform is designed in this paper. The system uses Apple iPhone4s and TI CC2540 which supports BLE (Bluetooth Low Energy) specification to realize short-range communications. On the one hand, vehicle BCM (Body Control Module) with CC2540 collects the car information by CAN in real-time. On the other hand, the smartphone connects CC2540...
Security modules is very important for a robust system, but in the past the programmer are always in the pursuit the security of a system but intertwine the software code with the security code. This paper introduce a universal design of web security based on AOP to provide the reader a way to separate the security aspect from the main logic of the system.
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