We also study biharmonic maps into Sol, Nil and Heisenberg spaces.
同时，我们还研究了一些模型空间之间的双调和映射Owl。
参考来源 - 关于多项式无穷调和与双调和映射的一些研究·2,447,543篇论文数据，部分数据来源于NoteExpress
By using Fourier transform method, the Green function of a point harmonic force applied at a bi-material plane is obtained.
利用积分变换方法得出了两相材料中作用简谐集中力时的格林函数。
Experimental results show that three-phase PWM converters are advantageous in high power factor, small input-line current harmonic distortion and bi-directional power flow.
实验表明，作为双馈感应发电机转子励磁电源的三相pwm变换器具有功率因数高、网侧电流谐波小、能量双向流等优点。
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