On behalf of the Editorial Board, we are pleased to present a selection of papers related to the 11th International Symposium on Electric and Magnetic Fields (EMF 2018) held in Darmstadt, Germany, on 10‐12 April, 2018.

The EMF Symposium series, whose first edition was held in Liège, Belgium, in 1992, aims at building a bridge between recent research advances in mathematical and numerical modelling of electromagnetic fields and the growing number of industrial problems requiring such techniques. The 11th edition was organized by the Institute for Accelerator Science and Electromagnetic Fields and the Centre for Computational Engineering of the Technische Universität Darmstadt, and attracted 95 participants from 19 countries.

Among the 84 presentations in the symposium program, 31 manuscripts were submitted for peer review. Fourteen papers were selected for publication in this special issue of the International Journal of Numerical Modelling: Electronic Networks, Devices and Fields. The high scientific and technical quality of the Symposium is well reflected in the quality of the manuscripts contained in this special issue.

Four broad topics were covered during the 11th edition of the symposium.

The first major topic considers the mathematical modelling of electromagnetic problems in view of their eventual numerical solution on computers, with contributions on the coupling of finite element and multipole methods,1 boundary element methods,2 inversion methods3 and electromagnetic transformation laws.4 The second major topic treats the numerical modelling of the electromagnetic behaviour of electric and magnetic materials, with contributions on the modelling of magnetoelectric composites5 and magnetic hysteresis.6, 7 The third major topic concerns homogenization and reduced order models, with contributions to the time‐domain homogenization of windings,8 extraction of capacitance matrices9 and lumped element modelling.10 The fourth major topic concerns application‐specific numerical techniques, with contributions to the modelling of synchronous reluctance machines,11 graded surge arresters,12 high voltage power cables13 and DC‐AC power converters.14

We express our gratitude to all the members of the EMF scientific committee—P. Alotto, J.P.A. Bastos, O. Biro, M. Clemens, S. Clenet, W.A. Cronje, A. Demenko, L. Dupré, J. Gyselinck, K. Hameyer, L. Kettunen, A. Kost, L. Krähenbühl, V. Mazauric, J. Melkebeek, G. Meunier, A. Nicolet, M. Petrun, A. Razek, M. Repetto, G. Rubinacci, R. Sabariego, J.K. Sykulski and M. Trlep—as well as to all the reviewers, who provided the necessary volunteer time and expertise to conduct a fair and detailed review, ensuring high publication standards for the selected manuscripts.

We also want to thank the staff from the Association des Ingénieurs de Montefiore (AIM), and especially C. Dizier, for their help organizing the EMF symposium series: the next edition will be held in Marseille, France, in July 2021.

Finally, we would also like to thank all the editorial staff of the International Journal of Numerical Modelling: Electronic Networks, Devices and Fields for their kind support during the whole process of preparation of this special issue.

We hope you will enjoy reading this selection of articles.

我们很高兴代表编辑委员会提交与2018年4月10日至12日在德国达姆施塔特举行的第11届国际电磁场研讨会（EMF 2018）相关的论文选集。

EMF专题讨论会系列的第一版于1992年在比利时的列日（Liège）举行，旨在在电磁场数学和数值模型的最新研究进展与日益增长的需要此类技术的工业问题之间架起一座桥梁。第11版由加速器科学与电磁场研究所和达姆施塔特工业大学计算工程中心组织，吸引了来自19个国家的95名参与者。

在研讨会计划的84场演讲中，有31篇手稿已提交同行评审。在《国际数值建模杂志：电子网络，设备和领域》的这一期特刊中，选择了14篇论文进行发表。专题讨论会的高技术质量很好地反映在本期特刊中的稿件质量上。

在研讨会的第11版中涵盖了四个广泛的主题。

第一个主要主题是电磁问题的数学模型，考虑到它们最终在计算机上的数值解，并为有限元和多极方法，1个边界元方法，2个反演方法3和电磁变换定律的耦合做出了贡献。4第二个主要主题是对电和磁材料电磁行为的数值建模，以及对磁电复合材料5和磁滞的建模的贡献。6，7第三个主要主题涉及均质化和降阶模型，这有助于绕组的时域均质化，8电容矩阵9的提取和集总元素建模。10第四个主要主题涉及特定于应用的数值技术，为同步磁阻电机，11个分级电涌放电器，12根高压电缆13和DC-AC电源转换器的建模做出了贡献。14

我们对EMF科学委员会全体成员表示感谢。Alotto，JPA Bastos，O。Biro，M。Clemens，S。Clenet，WA Cronje，A。Demenko，L。Dupré，J。Gyselinck，K。Hameyer，L。Kettunen，A。Kost，L。Krähenbühl，V。 Mazauric，J。Melkebeek，G。Meunier，A。Nicolet，M。Petrun，A。Razek，M。Repetto，G。Rubinacci，R。Sabariego，JK Sykulski和M. Trlep –以及所有评论者提供了必要的志愿者时间和专业知识，可以进行公正，详细的审查，从而确保所选手稿的出版标准很高。

我们还要感谢蒙特菲奥里英格尼斯大学协会（AIM）的工作人员，尤其是迪塞尔（C. Dizier）为组织EMF专题讨论会所提供的帮助：下一版将于2021年7月在法国马赛举行。

最后，我们还要感谢《国际数值建模杂志：电子网络，设备和领域》的所有编辑人员在准备本期特刊的整个过程中提供的大力支持。

我们希望您会喜欢阅读这篇文章。