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The fitting of a dipolar magnetic field by a dipole model
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作者 ZhaoJin Rong Yong Wei +8 位作者 Fei He Lucy Klinger YanYan Yang JiaWei Gao Zhen Shi HuaPei Wang ShuHui Cai HuaFeng Qin RiXiang Zhu 《Earth and Planetary Physics》 2025年第6期1125-1134,共10页
Many planets,including the Earth,possess a global dipolar magnetic field.To diagnose the interior source of the dipolar field,researchers usually adopt a dipole model consisting of six parameters to fit the observed d... Many planets,including the Earth,possess a global dipolar magnetic field.To diagnose the interior source of the dipolar field,researchers usually adopt a dipole model consisting of six parameters to fit the observed dataset of the magnetic field.However,the simultaneous fitting of these parameters often leads to multiple local optimal parameter sets.To address this fitting dilemma,Rong ZJ et al.(2021)recently developed a current loop model.This technique can successively separate and invert the loop parameters.Here,we further show how this technique can be reduced and modified to fit a dipole model.Applications of this reduced technique to the International Geomagnetic Reference Field model and the Martian crustal field model highlight its unique ability to diagnose both the planetary global dipolar field and the local crustal field anomaly,a capability that sets it apart from existing methods.The potential impact of this technique on geomagnetism and planetary magnetism is significant,given its unique ability to diagnose both the planetary global dipolar field and the local crustal field anomaly. 展开更多
关键词 geomagnetic field magnetic dipole INVERSION dipolar magnetic field magnetic anomaly crustal magnetic field magnetic sources eccentic dipole
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Training Effect of Isotonic Concentric and Eccentric Contraction of Elbow Flexors in Different Combinations
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作者 LAI Liuming YANG Jingyi (31 years old, lecturer) 《北京体育大学学报》 CSSCI 1995年第S2期56-60,共5页
In order to determine a rational protocol for isotonic training from macroscopic angle, five training protocols were designed, particularly protocols composed of pure eccentric contraction with heavy resistance in dif... In order to determine a rational protocol for isotonic training from macroscopic angle, five training protocols were designed, particularly protocols composed of pure eccentric contraction with heavy resistance in different propotions. The study results indicated that the protocol mixed with faster speed eccentric training,being more rational than traditional isotonic training and pure isotonic eccentric training, had the most all - round effects(including change of musle size, isotonic strength, musle power and et al. ). The protocol principle mixed with faster speed eccentric training may be widely used in rehabilitation and sports training,especially in the sports events of strength resistance. The significance to study the ratio of eccentric contaction to concentic contraction was suggested. 展开更多
关键词 REHABILITATION of musle function strength TRAINING eccentic CONCENTRIC ISOKINETIC musle power
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