The flame recognition system based on video image is applied to the fire flame detection, and it can be very good to avoid the shortage of the traditional fire flame detection system. Three frame difference algorithm is adopted to extract the motion features of the flame. And Lab color space is applied in analyzing the flame color. By analyzing the circular degree of the flame and the interference sources, the change rate of the flame area and the angle feature of the fire flame, it can be determined whether there is a fire in the image. The experimental results shows: this algorithm can not only effectively improve the accuracy and real-time performance of the flame detection and identification, but also eliminate the interference of other substances and reduce the misjudgment.

Aiming at the random delays and packet dropouts in ZigBee network, a Generalized Predictive Control (GPC) algorithm is proposed. The control sequence combine with timestamp, feedback sequence and queuing mechanisms to design a predictive control strategy. The GPC algorithm derivation, system design and implementation method are given, and then the algorithm is validated in a networked control system simulation toolbox based on TrueTime. The proposed algorithm shows better performance than conventional PID algorithm for a DC servo motor in control system based on ZigBee technology.

The cross traffic intensity of the optical burst switching network is a key parameter for the edge node operations. This paper provides an estimate model for edge nodes to infer the cross traffic on the control plane of the bottleneck core node. A normal M/D/1 and a special M/G/1 queuing model are applied to core nodes without and with wavelength conversion device respectively. Service time of the special M/G/1 queuing model is dependent with the traffic load. Edge nodes can then estimate the cross traffic of the core node through a likelihood function as well as a moment estimator. The observing variable that input to the estimator is the sojourn time of the burst control packet which can be obtained by sampling the residual offset time.