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PREFACE
The 3rd Japanese-Czech-Slovak Joint Seminar on Applied Electromagnetics (JCS- Seminar) was held in Prague (Czech Republic), from July 5 - 7. The Seminar was hosted by the Faculty of Electrical Engineering of the Czech Technical University in Prague, in cooperation with the Institute of Scientific Instruments (Academy of Sciences of the CR) in Brno. Previous JCS-Seminars were held in Piestany (Slovakia, June 1992) and Kyoto (Japan, January 1994). The JCS-Seminars are supported by the Japan Society of Applied Electromagnetics (JSAEM), in cooperation with its counterparts in the Czech Republic and the Slovak Republic.
A leading concept of the JCS-Seminar is to bring together the scientists and engineers dealing with electromagnetic fields in a variety of contexts, and, simultaneously, to promote cooperation in science an technology among the three countries. Due to the large interdisciplinary scope of the Seminar, principal and methodological (rather than empirical) aspects are emphasized.
The history of the JCS-Seminars begun just before the fall of the "Iron Curtain" in 1989, when some Japanese, Czech and Slovak colleagues met at several conferences and meetings in Tokyo (89), Graz (90), Prague (91), Bratislava (91) (see a photo), and Sorrento.
Prof. Kenzo Miya from Japan was a critical influential factor in all seminar initiations which were to become known as the "Central & Eastern European Initiative". Similar seminars are now established between Japan and Hungary, Japan and Poland, Japan and Russia, ...
After an encouraging and rather hasty start of our Seminar in Piestany, June 1992, some new questions later appeared in 1993, after the split of Czechoslovakia. In spite of a tough time-schedule, the 2nd JSC-Seminar held in January, 1994, in Kyoto, was termed almost an unexpected success. After our third session in Prague, the tradition of the JCS-Seminar seems to be established, though some organization questions still remain. Perhaps the major one is whether to preserve the original plan of the Seminar and to organize the sessions alternately in Japan and Europe (Czech or Slovak Republic). At any rate, it was negotiated in Prague that the fourth meeting should take place in Slovakia, in 1997.
The JCS-Seminar in Prague was attended by more than 60 researchers from Japan, Czech and Slovak Republics, together with colleagues from Hungary, Macedonia and Tunisia. Only oral presentations took place at the Seminar. The associated programme involved a social evening at Nebozízek restaurant and a visit to Karlstejn castle.
The "Proceedings" contains 36 selected papers from the submitted full-length papers which passed a peer review procedure. Topics of interest are grouped as follows: 1. Inverse and Optimization Methodologies 2. Numerical Methods and Computer Simulations in Electromagnetics 3. NMR and Bioelectromagnetism 4. Electro-magneto-thermo-mechanical Couplings 5. Material Science in Electromagnetics 6. Electromagnetic Engineering Last but not least, the Editors (Czech coordinators) would like to express their gratitude to our many colleagues who contributed to the success of the Seminar. Special thanks are also due to the Japanese and Slovak coordinators and to all active participants. We believe that Prague's unique history and culture facilitated a memorable and friendly experience for all participants of the JCS-Seminar. Brno & Prague, December 1996 Ales Gottvald & Ivan Zemánek
(Editors)
The following book has been issued after the JCS-Seminar in Prague:
CONTENTS:
Preface ................................................................................................. iii Organizers ............................................................................................. iv Coordinators ........................................................................................... v Scientific Commitee ................................................................................. vi
1. INVERSE AND OPTIMIZATION METHODOLOGIES
Inverse and Optimization Methodologies in Magnetic Resonance - Part 1: Evolution Strategies; Part 2: Meta-Optimization; Part 3: Applications to Bloch and Maxwell Systems; Part 4: Applications to In Vivo Spectra Quantifications Gottvald A. ...................................................................................... 2 The Use of Genetic Algorithms for Homogeneity Correction in the Magnetic Field of NMR Spectrometer Osmera P. ....................................... ................................................ 18 Impedance Tomography Vasina J., Lepka J. .......................... ................................................... 25 Optimisation of an Electromagnetic Flowmeter Dedek L., Burian I., Dedková J. ............................................................ 32
2. NUMERICAL METHODS AND COMPUTER SIMULATIONS
IN ELECTROMAGNETICS
Accuracy of Magnetic Lens Computation with the First Order Finite Element Method Lencová B. ....................................................................................... 40 Two-Dimensional Magnetic Field Analysis Using Edge Elements Tsuboi H., Kobayashi F., Misaki T. ........................................................ 47 R-Functions for Boundary Conditions Ivanyi A. .......................................................................................... 52 Mathematical Treatment of Planar Magnetic Fields with Permanent Magnets Melkes F. ......................................................................................... 69 Numerical Analysis of Type II Superconductor Based on Ginzburg-Landau Theory Demachi K., Asakura H., Yoshida Y., Miya K. ........................................... 77 3-D Finite Element Analysis of Static Force Problem by Hexahedral Edge Element (Problem 20) Tatsuoka S., Kawase Y. ....................................................................... 83 Magnetic Field of Hightorgue Stepmotor Wagner J., Maga D., Ort-Snep R. .......................................................... 87
3. NMR AND BIOELECTROMAGNETISM
Measurement and Analysis of the Magnetic Fields of Shim System for MRI Magnet Konzbul P., Svéda K. .......................................................................... 93 Influence of Superconductor Magnetization and Flux Creep on Field Homogeneity and Stability of NMR Magnets Musilová V., Srnka A. ......................................................................... 97 NMR Sensor for Magnetic Field Measurement Frollo I., Szomolanyi P. ..................................................................... 108 Located Magnetic Field Genaration for Magnetotherapy Frollo I. ......................................................................................... 114
4. ELECTRO-MAGNETO-THERMO-MECHANICAL COUPLINGS
Magnetostriction and Magnetoacoustic Emission of Ferromagnetic Material Under Stress Matsumoto E. .................................................................................. 120 Experimental Study on Vibration Control of MRI Coil Drum Using Electromagnetic Force Cancellation Qui J., Tani J., Takagi T. ................................................................... 130 3-D Animation of Magneto-Thermal Coupled Problem Using FEA Cingoski V., Namera A., Kaneda K., Yamashita H. ................................... 140 Braking Device with Electrorheological Fluid Shimada K., Fujita T., Iwabuchi M., Okui K. ........................................... 147 Electromagnetic Wawe Transition Through a Metal Layer due to an Acoustic Excitation Cáp I., Cápová K. ............................................................................ 156
5. MATERIAL SCIENCE IN ELECTROMAGNETICS
Magnetic Properties of Electrical Steel Sheets with Uni-Polarized Magnetization Sasaki T., Takada S., Yasuda T. ........................................................... 166 Modelling the Perminvar-Type B(H) Curves by Simple Analytical Functions Gonda P., Usák E. ........................................................................... 175 Measurement and Approximation of the Magnetization Curves of Strontium Ferrites up to Curie Temperature Gonda P., Dosoudil R. ....................................................................... 181 Magnetic Defectoscopy of Steel Ropes Lesnák M., Ciprian D., Pistora J., Mádr V., Skipala J. .............................. 186 Magnetic Properties of the Respired Particles Ripka P., Navrátil P., Zák T., Schneeweis O., Bláha J., Jerábek J. ............... 194 Influence of Additonal Alloying on Structure, Magnetic Properties and Magnetoresistance of Alfenol 16 Schneeweis O., Zák T., Vondrácek M. .................................................... 198
6. ELECTROMAGNETIC ENGINEERING
Planar Type Eddy-Current Testing Probe Yamada S., Iwahara M., Katou M. ........................................................ 206 Vibration Control of Magnetic Levitation Body Using Neural Networks and Fuzzy Reasoning Kanamori M., Ishihara Y. ................................................................... 213 Accuracy of Digital Power Losses Measurement Ben Dakhlia C., Havlicek V. ................................................................ 222 The Results of the Special Algorithm Use in the Single Sheet Tester Control Program Zemánek I. ...................................................................................... 230 Effect of Magnetic Properties on Pulse Characteristics of an Igniter for HID Lamps Kakehashi H., Ogasawara H., Ohta Y., Fukuhara M., Fukunaga H. ............... 235 Basic Study of Levitation-Melting Method Todaka T., Enokizono M., Yokoji K. ...................................................... 240 High Temperature Superconductive Microwawe Resonator Papez V., Kuba J. ............................................................................. 244 List of Authors ...................................................................................... 248
The 3rd
Japanese - Czech - Slovak Joint Seminar
on Applied Electromagnetics
Prague (Czech Republic), July 5 - 7, 1995
Hosted by:
Czech Technical University in Prague, Faculty of Electrical Engineering
Organized and Supported by:
Czech Technical University in Prague, Faculty of Electrical Engineering Academy of Sciences of the Czech Republic, Institute of Scientific Instruments Japan Society of Applied Electromagnetics Czech Society of Applied Electromagnetics Slovak Technical University, Faculty of Electrical Engineering
Seminar Venue:
Hotel Krystal José Martího 2/407, P.O. Box 179, 160 41 Praha 6 - Veleslavín, Czech Republic TEL: +42 2 316 2761, FAX: +42 2 316 4215
Seminar Secretariat:
I. Zemánek Czech Technical University, Faculty of Electrical Engineering, Dept. of Circuits Theory, Technická 2, 166 27 Praha 6 - Dejvice, Czech Republic. TEL: +42 2 2435 2285, FAX: +42 2 243 107 84, E-MAIL: zemanek@feld.cvut.cz
Coordinators
Japan:
Yoshiyuki Ishihara Fac. of Engineering Doshisha University Kamigyo-ku, Kyoto 602 Japan TEL: +81 75 251 3764 FAX: +81 75 251 3737 Eiji Matsumoto Dept. of Mechanical Engineering Kyoto University Kyoto 606 Japan TEL: +81 75 753 5247 FAX: +81 75 771 7286 E-MAIL: matumoto@energy.kyoto-u.ac.jp
Czech Republic:
Ivan Zemánek Fac. of Electrical Engineering Czech Technical University Technická 2 CZ-166 27 Praha 6 Czech Republic TEL: +42 2 2435 2285 FAX: +42 2 243 107 84 E-MAIL: zemanek@feld.cvut.cz Ales Gottvald Inst. of Scientific Instruments Academy of Sciences of the CR Královopolská 147 CZ-612 64 Brno Czech Republic TEL: +42 5 415 14 224 FAX: +42 5 415 14 402 E-MAIL: gott@isibrno.cz
Slovak Republic:
Jozef Sláma Dept. Theor. Appl. El. Eng. Slovak Technical University Ilkovicova 3 812 19 Bratislava Slovak Republic TEL: +42 7 791 171 FAX: +42 7 720 415 E-MAIL: elo@iris.elf.stuba.sk Pavel Kabos Dept. Theor. Appl. El. Eng. Slovak Technical University Ilkovicova 3 812 19 Bratislava Slovak Republic TEL: +42 7 351 171 FAX: +42 7 720 415
Local Organizing Committee
Chokri Ben Dakhlia, Czech Technical University Jan Kuba, Czech Technical University Hana Kucharová, Academy of Sciences of the CR Václav Papez, Czech Technical University Martin Pokorný, Czech Technical University Zbynek Skvor, Czech Technical University Martin Sojdr, Technical University Brno Jaromír Volf, Czech Technical University
Scientific Committee
O. Benda, Slovak Technical University, Slovakia J. Brilla, Comenius University, Slovakia B. Coufalová, Czech Technical University, Czech Republic V. Cingoski, Hiroshima University, Japan & Macedonia L. Dedek, Technical University of Brno, Czech Republic I. Dolezel, Academy of Sciences of the CR, Czech Republic K. Draxler, Czech Technical University, Czech Republic M. Enokizono, Oita University, Japan I. Frollo, Slovak Academy of Sciences, Slovakia M. Fukuhara, Matsushita Electric Works V. Havlícek, Czech Technical University, Czech Republic T. Honma, Hokkaido University, Japan I. Hlásnik, Slovak Academy of Sciences, Slovakia A. Ivanyi, Technical University of Budapest, Hungary J. Jan, Technical University Brno J. Jasenek, Slovak Technical University, Slovakia H. Kakehashi, Matsushita Electric Works, Japan H. Kawaguchi, Hokkaido University, Japan I. Kneppo, Slovak Metrological Institute, Slovakia P. Kneppo, Slovak Academy of Sciences, Slovakia V. Kreisinger, Academy of Sciences of the CR, Czech Republic B. Lencová, Academy of Sciences of the CR, Czech Republic D. Mayer, West Bohemian University, Czech Republic F. Melkes, Technical University of Brno, Czech Republic M. Mikulec, Czech Technical University, Czech Republic K. Miya, University of Tokyo, Japan T. Morisue, Nagoya University, Japan V. Musilová, Academy of Sciences of the CR, Czech Republic K. Nagaya, Gunma University, Japan M. Neveselý, Technical University of Transport and Communications, Slovakia K. Novotný, Czech Technical University, Czech Republic I. Plander, Slovak Academy of Sciences, Slovakia M. Polák, Slovak Academy of Sciences, Slovakia J. Polák, West Bohemian University, Czech Republic A. Saito, Tottori University, Japan Y. Saito, Hosei University, Japan T. Sasaki, Gifu University, Japan T. Takagi, Tohoku University, Japan J. Tani, Tohoku University, Japan H. Tsuboi, Fukuyama University, Japan Y. Uchikawa, Nagoya University, Japan S. Ueno, Kyushu University & University of Tokyo, Japan M. Uesaka, University of Tokyo, Japan B. Ulrych, West Bohemian University, Czech Republic P. Usák, Slovak Academy of Sciences, Slovakia H. Yamashita, Hiroshima University, Japan T. Zák, Academy of Sciences of the CR, Czech Republic