基于神经网络的电力负荷预测

近几年来,中国电力工业正在逐步进行电力体制改革,电力市场运营机制也逐步在我国建立。国内电力市场的逐步开放并投入运营,对电力系统负荷预测的研究也越来越引起人们的关注。负荷预测是从已知的用电需求量出发,在考虑经济、气候等相关因素的前提下,对未来的用电需求做出的合理预测。负荷预测包括两方面的含义：对未来需求量（功率）的预测和未来用电量（能量）的预测。电力需求量的预测决定发电、输电、配电系统新增容量的大小;电能预测决定发电设备的类型（如调峰机组、基荷机组等）。     

微波辐照选育木聚糖酶高产菌宇佐美曲霉

A high yield xylanase producing strain, A. usamii L336-23, was screened out from its parent strain A.usamii L336 after microwave irradiation. Its productivity of xylanase activity increased by 35.7% from 21000μu·ml-1 to 28500μu·ml-1 and was stable after frequent subcultures and storage for more than two months. The mechanism of microwave mutation was also discussed.