X-ray photographs of the sun on March 7, 1970

The Sun was photographed from an Aerobee rocket by means of equipment responding to the wavelength interval 3-60 angstroms, revealing interesting relationships between structures in the corona.     

Rocket UV flash spectra from the solar eclipse of March 7, 1970

Flash spectra of the total solar eclipse throughout all its phases have been obtained in the extreme ultraviolet for the first time.     

Effects of magnetic fields on Fe-Si composite electrodeposition

Coatings containing Fe-Si particles were electrodeposited on 3.0wt% Si steel sheets under magnetic fields. The effects of magnetic flux density (MFD), electrode arrangement and current density on the surface morphology, the silicon content in the coatings and the cathode current efficiency were investigated. When a magnetic field was applied parallel to the current and when the MFD was less than 0.5 T, numerous needle-like structures appeared on the coating surface. With increasing MFD, the needle-like structures weakened and were transformed into dome-shaped structures. Meanwhile, compared to results obtained in the absence of a magnetic field, the silicon content in the coatings significantly increased as the MFD was increased for all of the samples obtained using a vertical electrode system. However, in the case of an aclinic electrode system, the silicon content decreased. Furthermore, the cathode current efficiency was considerably diminished when a magnetic field was applied. A possible mechanism for these phenomena was discussed.     

钕铁硼稀土永磁材料交流失磁

Nd- Fe- B稀土永磁材料的失磁现象制约了其在大型永磁电机中的应用。针对电机的实际工作环境 ,研究了不同工作状态的磁体在交变磁场作用下表面磁感应强度随时间的变化。研究发现 ,常温 2 5℃下磁体只有起始最低工作点低于其退磁曲线拐点时才会发生失磁现象 ,且随着磁场交变频率的升高 ,磁体失磁程度逐渐增大。并且运用磁体磁畴畴壁钉扎与运动模型和畴壁钉扎的热激活效应对实验现象进行了合理解释。这对 Nd- Fe- B稀土永磁电机的设计和失磁故障分析提供了实验依据与技术参考     

含非线性磁介质材料恒定磁场的差分离散

给出了含非线性磁介质恒定磁场中用积分泊松方程的差分离散，该方法把求解非线性准泊松方程边值问题转化成求解线性代数方程组，在变压器，电机内电磁场的分析与计算中具有广泛的应用。