People pay more attention to the security of RFID, this paper establishes the evaluation index architecture of RFID security, Then according to these indexes for the evaluation of the RFID system security which based on fuzzy synthetic evaluation model, all of this is to evaluate the security of RFID system.

Energy Conservation has been the focus in the ad hoc wireless network study. As the capacity of battery is limited, node will lose its function once its energy is exhausted. This thesis is aiming to calculate among the multiple transmission paths and find out a path which consumes the least energy. Previous studies are focused on finding the minimum hop path in transmission. In this study we propose to use the square of the distance between nodes as a proxy to the power consumption as the transmission power is proportional to the square of the distance between the nodes. We simulate the node transmission by limiting node out-degree in broadcasting and calculate the minimum sum of the square of distance between nodes in the path to find a path which has the least energy consumption.

The pollution characterizations of water-soluble anions of PM2.5(fine particle matter with aerodynamical diameter <2.5 m="" in="" wuhan="" economic="" and="" technological="" development="" zone="" china="" were="" studied="" during="" april="" 2013="" the="" concentration="" of="" pm="" sub="">2.5 and four kinds of water-soluble anions that consisted of fluoride (F-), chloride (Cl-), sulfate (SO42-), and nitrate (NO3-) were determined. The results indicated that the urban air quality in Wuhan was polluted by fine particle matter to some extent. During the monitoring period, there were 50% of the daily mean concentration of PM2.5exceeded the China second-class ambient air quality standards (75μgm-3). The concentrations of water-soluble anions in PM2.5followed the order of SO42-> NO3-> F-> Cl-. SO42-and NO3-were the dominant anions in Wuhan Economic and Technological Development Zone, and contributed more than 70% to the total measured water-soluble anions. The mean ratio of NO3-and SO42-in PM2.5was calculated to be 0.49, which indicated that coal combustion was the major source of PM2.5in Wuhan Economic and Technological Development Zone, China.

There are usually energy holes caused by uneven energy consumption of transferring data in Cognitive Radio Ad Hoc Network (CRANH), which brings about many difficulties in various applications, as limit the network lifetime. To solve this problem, the major idea so far is based on the real-time routing mechanism. However, the method needs to cost extra energy for be routed again after transferring data, it can decrease network surviving lifetime. Hence, a self-adaptive power adjustment routing mechanism for Cognitive Radio Ad Hoc Network proposed in this paper. The algorithm can be minimum of network energy consumption of transferring data based on self-adaptive power adjustment technique can find different neighbor set to meet different power thresholds. Theoretically and experimentally, it is concluded that the proposed algorithm is able to decrease energy consumption and improve the network lifetime of CRANH.