The Merrifield-Simmons Index And Hosoya Index Of Some Graphs

The Internet of things has been recognized as the third wave of the information industry after the computer and the Internet. It is the inevitable result of the development of the Internet as a platform, is a high-tech industry, the Internet of things is very widely used, which is the most representative of the smart home application. In this paper, the domestic and foreign research status of smart home is compared, in view of the shortcomings of existing smart home, proposed and designed a wireless network system based on ZigBee smart home.First of all, the design of the comparison of several common wireless transmission mode, the results show that in ZigBee than Wi-Fi, infrared, Bluetooth and other applications in Smart Home has more advantages, so as to ZigBee wireless transmission system of this design, determines the design of smart home system through the demand analysis.Then, the Smart Home system hardware and software design in detail. The hardware design mainly includes two parts:one part is designed as terminal acquisition module; the other part is the design of intelligent gateway. The terminal module collection in the residential environment temperature, humidity, combustible gas, light and other environmental variables, and these variables are passed to the gateway through the ZigBee network, the gateway is connected to the Smart Home PC serial port clearance, revealed that environmental information collected by computer. At the same time, issued an order to achieve control of the terminal nodes can also host computer. The software design is mainly IAR as software development platform, and uses Z-Stack protocol stack, designs the node to network, network, data transmission between the network and node code, detailed communication protocol between the host computer and intelligent gateway, so that the design is simple and clear.Finally, I simulate the family living environment in the laboratory, on the design of the system for the overall test. Including:upload, security alarm, environmental data acquisition test error rate of data transmission. Tests show that this design can complete the design of the intended purpose.