The materials from examinations were analysed and compared. The author suggested that changes of T vector ring and ST vector could be acted as a non invasive, simple and sensitive method to diagnose CHD early. 对检查资料比较分析后,作者提出,心电向量T环改变及ST向量可以作为冠心病早期诊断的一种简捷、敏感的无创检查方法。
Some Characteristics of a Left Vector Space Over Divison Ring 除环上左向量空间的若干性质
Conclusion Making use of a set of complete states as basis vector when the study of noncommutative ring is very convenient. 结论在研究非对易环(torus)时,用{φmnj>}做基矢是特别方便的。
According to the vector potential of a current-carrying ring and the superposition theorem of the field, the series solutions for the magnetic fields of a solenoid wired with thin wire are obtained in this paper. 利用圆电流矢势和磁场的叠加原理,导出了细导线密绕螺线管磁场的级数表达式。
Vector potentials produced by uniform electric current in the shape ring, cylinder and disc are discussed. 采用柱对称性和叠加原理讨论了均匀载流圆环、圆筒、圆盘的矢势问题。