Energy and Exergy Analysis, and Thermoeconomic Performance of a BCHP System

Building cooling, heating and power (BCHP) systems should play an important role in achieving the goals of energy efficient use and environment protection in China. It will make big sense when this type of system shows a good performance energetically and economically. An on-site BCHP system being the first in the country was installed and put to use five years ago. As the first step to evaluate the project, com~tations were made based on thermodynamic and themoeconomic theories to evaluate the system on full load and off-design conditions in summer. Discussion and analyses are made mainly in terms of exergetic efficiency and costs of unit amount of useful exergy produced in this paper.     

基于高斯混合模型的无线传感器网络定位算法

针对距离误差对定位结果的影响, 提出一种基于高斯混合模型的无线传感器网络定位算法. 该算法将高斯混合模型方法引入到无线传感器网络的定位问题中, 通过高斯混合模型分析找出误差较大的距离信息并将其剔除, 对剩余距离信息使用三边测量定位法进行定位求解, 同时结合加权定位算法进行位置估计. 仿真实验结果表明, 改进算法能提高定位精度, 且定位结果更稳定.