查询词典 Bosworth Field

Geomagnetic field ; Spherical cap harmonic analysis ; Chinese geomagnetic reference field ; Spherical cap harmonic model.

地磁场；冠谐分析；中国地磁参考场；冠谐模型

Taking IGRF2000 as the main normal field in the region, the spherical cap harmonic modelsof the anomaly geomagnetic field in the region are established.

将国际参考地磁场（IGRF2000）作为地磁正常场，建立了京津冀地区地磁异常场的球冠谐模型。

Electronic energy and wave function of three-layer spherical nanometric system in homogeneous electric field is solved, the influence of applied field and sample size to the shift of Stark energy level is discussed.

求出均匀外电场作用下三层球状纳米系统电子的能量和波函数，讨论了外电场和样品线度对斯塔克能级移动的影响

Third, The author analyzed the shimming method of the existing magnet system and programmed it. Because the base field homogeneity of the open magnet is worse and only passive shimming is available, it is necessary to study more effective shimming algorithm. The ordinary shimming method is based on the disintegration of the magnetic field using spherical harmonics. It is so tedious that involved in large scaled non-linear equations.

再次，详细分析了现有磁体系统的匀场方法，并通过编程运算，发现在开放型磁体这一特殊情况下，由于基场均匀度差和只能使用水磁材料垫补进行匀场等原因，基于对磁场分布用球谐函数分解并消去球谐函数高次项的常规匀场方法在实现上相当繁琐，牵涉到大型非线性方程组的求解，所以必须采用更有效的匀场算法。

We proposed a set of tabulate shim coils to improve the imaging field homogeneity for permanent magnet. By studying the magnetic spherical harmonics and its Taylor expansion, the proposal of designing lower-order radial coils was derived including x, y, xz, xz~2, x~2-y~2 etc. In addition, a novel composite design was presented for the axial coils. By controlling the shim currents of axial coils, different axial magnetic fields can be obtained. This method simplified the design process of axial coils, and made the axial correcting magnetic field more precise.

本文针对永磁体的组成结构提出了一种平板式匀场线圈设计方法，通过研究成像磁场的球谐函数以及通电圆弧在自由空间产生磁场的泰勒展开级数，导出了x、y、xz、xz~2、x~2-y~2等低阶径向线圈的设计方法，同时针对轴向线圈提出了一种新的混合式设计方案，能够通过控制线圈中的电流组合实现对不同轴向磁场分量的获取，简化了轴向线圈的设计过程，提高了校正磁场的准确性。

Chapter 3. Make use of the unified field equation not only deduce the motional equation for matter, but also still have get the spacetime metric of the unified field and spherically symmetry electromagnetic metric.

第三章 利用统一场方程不仅导出物质的运动方程，而且还得到了统一场的时空度规和球对称电磁度规。

The integration of principles of psychology field:"Situation - teachers - students" to promote among the benign form of multi-refraction of the psychological field, to make children and can not help but use "splenetic" to learning, teaching can enter into a boiling state.

心理场整合原理："情境——教师——学生"三者之间形成的良性推进的多向折射的心理场，促使儿童情不自禁地用"心眼"去学习，教学便可进入一种沸腾的状态。

First, the ICF and the fast ignition are introduced simply. Secondly the basic concepts and theories for laser-plasma interaction are expatiated, then the recent research status, the generation mechanisms of spontaneous magnetic field during the interaction of laser-plasma are described in detail. Finally the introduction is focused on the experiment setup and results of spontaneous magnetic field on 20TW laser facility in China Academy of Engineering Physics Key Laboratory.

论文简单介绍了惯性约束聚变和快点火的概念，阐述了激光等离子体相互作用相关的基本概念和基础理论，比较全面地阐述了激光与等离子体相互作用中自生磁场的研究现状、产生机制，并详细介绍了在高温高密度国家重点实验室20TW超短超强激光装置上利用高次谐波伴线结构法取得的自生磁场测量结果。

Before she turned 15, she had an ambition to become a formidable track and field sportswoman, aiming to represent the nation in track and field athletics.

这个梦想一直是那么的真实，但一次突如其来的意外，从此毁灭了Jeanie当运动员的梦想。

To realize near-field optics and hence increase storage capacity and density in near-field optical disk drives, the flying pickup head has to enable the slider to fly at a stable height above the disk surface.

为了实现近场光学以提升资料的储存容量与密度，近场光碟机的飞行读写头机构必须使滑动片在碟片上方以稳定的高度飞行。

In other research, chondroitin is being investigated for use in several other conditions.

在其它研究，软骨素被调查用於几个其它情况。

They would make fun of him for having to work.

他们拿他的工作来开玩笑。