In order to facilitate the study of the structure of cement components, this paper uses image processing technology to achieve multi-threshold segmentation for cement scanning electron microscope image under different conditions and applies an optimized Otsu multi-threshold segmentation based on fireworks algorithm. The method designs fitness function with Otsu multi-threshold segmentation method and searches optimal solution by iteration with the fireworks algorithm. Finally, the search problem of optimization is transformed into a multi-variable solution. The experimental results show that this method can achieve the same result as the classical algorithm and it has better convergence and stability, and the method can be widely used in many fields.
EIGRP is an enhanced version of IGRP, and is a private routing protocol of Cisco Systems, Inc. We analyze the packet format of EIGRP and the advantages including PDM, RTP, DUAL, rapid convergence times, low usage of network resources, and route summarization. In Packet Tracer simulation software, the simulation experiments configure EIGRP in a simple network topology. The simulation results show the different structure of EIGRP packet, and EIGRP supports well route summarization and provides extremely quick convergence times with minimal network traffic for low usage of network resources.
With the improvement of the living standard of the people and the limit of the electric power supply, the shortage problem of the electric power are more and more serious in large cities. There are many factors affecting the requirement of urban electric power supply such as urban population, the structure and the scale of economic, the he weather conditions, etc. Based on the actual data of Beijing from 2008 year to 2009 year, we quantitatively analyze the relationship of temperature and electric load with regression analysis method. The result can provide the changing rules of the electric load with temperature and give some suggestions on improving urban electric power supply.
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