基于灵活输电电价的跨地区电能撮合交易模型

中国电力市场与世界上其他国家或地区的电力市场存在比较大的差异,不仅体现在价格形成机制上,还反映在要维护社会公平、促进节能减排、兼顾各利益调整等方面。近期,国家出台相关政策明确规定电网企业在跨区、跨省交易中的输电费用收取标准。跨省输电价格存在固化或在规定收取标准内浮动2种选择方式。为能满足不同的收取策略,保证交易正常有序...     

大用户与发电企业直接交易算法探讨

在分析中国开展大用户直购电的现实意义和研究大用户直购电交易的优缺点基础上,从经济学和市场学的角度出发,将电力市场、竞价算法等理论与大用户直购电相结合,搭建了大用户直购电交易算法模型,重点给出了集中撮合式交易模型以及快速算法,最后用算例进行了验证。     

Localization for mobile target in wireless sensor networks

A precise localization for mobile target in wireless sensor networks is presented in this letter,where a geometrical relationship is explored to improve the location estimation for mobile target,instead of a simple centroid approach.The equations of location compensation algorithm for mobile target are derived based on linear trajectory prediction and sensor selective activation.The results based on extensive simulation experiments show that the compensation algorithm gets better performance in metrics of quality of tracking and energy efficiency with the change of sensor sensing range,the ratio of sensing range and sensor activation range,and the data sampling rate than traditional methods,which means our proposing can achieve better quality-energy tradeoff for mobile target in wireless sensor networks.     

非正交选择译码转发协同

为了提高两跳中继网络的传输速率和协同分集增益,该文提出一种非正交的选择译码转发策略传输数据。单节点协同时,协同节点仅在正确译码时采用和发送节点非正交的时序转发;在多节点协同时,采用一种节点选择算法选择译码正确且信道条件最佳的节点用于非正交转发。这种协同策略可获得和非正交放大转发相同的分集复用折衷性能,但其实现更简单,且在低信噪比时中断性能更好。