济阳坳陷花沟地区火成岩重磁反演方法

提出了基于单相关系数搜索的变形的n维黄金分割算法,根据重磁异常反演了济阳坳陷花沟地区的视密度与视磁化强度的空间分布。结合钻井、磁力和重力异常图圈定了其火成岩的分布:推断出42个酸性火成岩体和33个基性火成岩体;按200m的深度间隔分11层编制的800-3000m内各深度层上的火成岩分布图,较好地展示了火成岩的空间位置。     

公伯峡水电站发电机励磁系统

公伯峡水电站发电机励磁系统采用了广州电器科学研究院生产的EXC9000型自并激可控硅静止系统。主要介绍该励磁系统的构造、性能和功能。     

研磨对Fe─29wt％Ni合金超细微粒马氏体转变及比磁化强度的影响

在Ｎ＿２气氛中，用蒸发冷凝法，制备了不同平均粒径（１２～１００ｎｍ）的Ｆｅ－２９ｗｔ％Ｎｉ合金超细微粒样品。它们是马氏体ａ’（ｂｃｃ）和奥氏体γ（ｆｃｃ）的混合体。而且，马氏体体积分数随样品平均粒径减小而明显增加。实验表明，手工研磨，导致马氏体体积分数和比磁化强度显著增大。平均粒径越大，这种影响越大。     

永磁轴承磁化方向的研究

采用等效磁荷理论，对永磁轴承的磁化方向进行了研究，证明了在磁轴承几何参数相同的情况下，磁体径向磁化或轴向磁化对轴承承载力和刚度没有影响。这使得磁轴承的理论研究和制造技术得到了简化。     

温度和多重项耦合对Er3Ga5O12在强磁场中磁化的影响

用量子理论计算了Er3Ga5O12在[100]和[111]方向的基态磁化强度随温度的变化情况，证实了实验的结论，计算了^4I13/2和^4I15/2两个多重项耦合对基态磁化强度的影响，进一步从理论上分析了Er3Ga5O12磁性非线性产生的微观机制。     

铁磁性物体在地磁场中的自发运动磁化

依据法拉第电磁感应定律和铁磁性物质在磁化一退磁过程中的能量差异，阐明了铁磁性物体在地磁场中的摆动、振动和周期性往复平动都会引起该物体的自发磁化。虽然每次磁化一退磁过程之后物体上的剩磁增量非常微小，但随着循环次数的增加该物体最终必然被强烈地自发磁化。从而推知：地磁场的矢量特性和纬度效应对金属磁记忆检测与诊断技术适用性和可靠性的影响都不大。     

磁化作用对聚合物驱油效果的影响

通过对磁化前后聚合物溶液粘度的测量，探讨了聚合物磁化增粘机理。同时，通过岩心驱油实验，对磁化作用对聚合物驱油效果的影响进行了分析和讨论，得到了磁处理方式及磁化作用对聚合物驱提高采收率影响的规律。     

Slater Pauling magnetization curve in transition metal phosphides

A Slater Pauling type magnetization curve has been found for transition metal phosphides. The curve suggests a transfer of 2.4 electrons from each phosphorus atom to the metal d-bands. The curve is independent of crystal structure. Some deviations from the Slater Pauling curve exist which may be due to antiferromagnetic coupling or due to the formation of virtual bound states. Research supported by a grant from the National Science Foundation     

High Tc Superconductor Theoretical Models and Electromagnetic Flux Characteristics

High Tc Superconductors (HTS) have special electromagnetic characteristics and phenomena. Effort has been made in order to theoretically understand the applied HTS superconductivity and HTS behaviors for practical applications, various theoretical models related to the HTS electromagnetic properties have been developed. The theoretical models and analytic methods are summarized with regard to understanding the HTS magnetic flux characteristic which is one of the most critical issues related to HTS applications such as for HTS magnetic levitation application.     

Effects of processing variables on the Y2BaCuO5 size and magnetic properties of melt-processed YBa2Cu3Ox

Samples of YBa₂Cu₃O_x (123) with excess Y₂BaCuO₅ (211) in the molar ratio of 5:1 ( 123/211) were processed using the “solid liquid melt growth” (SLMG) technique. The effect of hold time above the peritectic on the magnetic properties was examined. Extended hold times above the peritectic during processing degrade the magnetic properties of SLMG processed 123. In SLMG 123, the very fine (>100 nm) 211 particles produced by this processing route are the primarymagnetic flux pinners. Extended hold periods reduce the number and/or coarsen the average size of these fine precipitates, resulting in a reduced magnetization. These results were compared to undoped Y123 processed by the more traditional melt texture growth (MTG). In MTG processing, extended hold times above the peritectic are found to result in improved magnetic behavior because of increased defect densities.