main magnet meaning in English
主磁铁
Examples
- The edge effect of the main magnet influences the imaging quality seriously
主磁体端部磁场的边缘效应严重影响其成像质量。 - Using permanent magnet as the main magnet , which is the core of nmr imaging device , is the current trend
主磁体是该装置的核心部分，采用永磁型主磁体是当前的重要发展方向。 - The controller developed by us is used to control the storage ring main magnet power supplies in nsrl
摘要nsrl电源设备控制器主要是用于控制储存环主磁铁电源和分析铁电源，具有高精度和高稳定度的特点。 - Base on certain main magnets of nmr this thesis designs the most excellent structure of the pole shape and obtains a relatively uniform magnetic field in a large imaging volume . the calculating model of pole shape made of pure iron can be simplified with the infinite permeability and calculated with the scalar potential . the rule between pole shape and the homogeneity or the size of uniform region of magnetic field is discovered and factors of influencing the homogeneity of the magnetic field are held so that the main magnet with the optimized size of pole shape can produce a relatively uniform magnetic field in a large imaging volume
本文针对一类典型结构的主磁体，通过磁场分析与大量的计算，找到了极靴形状的改变影响样品区磁场均匀度以及均匀区域范围的规律，掌握了极靴形状的变化趋势及其形状影响样品区磁场均匀度的各种因素，进行了极靴的形状优化设计并编制了相应的计算机软件，给出了极靴形状的具体尺寸，使得主磁体能在更大空间内产生相对均匀的磁场。 - The permanent main magnet is mainly the developing direction through analyzing the advantages and disadvantages between three sort of main magnets : superconductor , routine and permanence . aiming at the different types of the permanent main magnet with edge effects , which ca n ' t reach the demand of nmr imaging , numerical method of magnetic field computation and the theory of shape optimization is applied
因此，本文应用磁场数值分析和形状优化的理论和方法，探索了大空间内均匀磁场的技术，目标是在核磁共振成像主磁体己设计好的基础上，对极靴的形状进行优化设计，尽量扩大样品区磁场均匀的范围。