干吸工段硫酸浓度计的标定方法

介绍了烟气制酸系统干吸工段常用的电磁式硫酸浓度计的标定方法 ,并针对罗斯蒙特的228型号传感器及1056型号变送器,详细描述了采用自定义曲线的方法对94%~100%测量范围进行标定。

Special automorphisms on Shimura curves and non-triviality of Heegner points

We define the notion of special automorphisms on Shimura curves. Using this notion, for a wild class of elliptic curves defined over Q, we get rank one quadratic twists by discriminants having any prescribed number of prime factors. Finally, as an application, we obtain some new results on Birch and Swinnerton-Dyer(BSD) conjecture for the rank one quadratic twists of the elliptic curve X_0(49).

WGYC—1A型微机式过电压过激磁保护装置介绍

本文论述了作为发电机、变压器过激磁故障的重要保护WGYC－1A型微机式过电压、过激磁保护装置设计的基本原理，技术要求，使用维护等。主要功能为两段过电压保护，两段定时限过激磁保护，两段反时限过激磁保护。反时限特性曲线为自定义坐标点（最多20个点）。经过动模试验及现场运行证明其可靠性、原理先进性，能满足发电机、变压器过激磁故障的保护之要求。