均匀磁场

The coercivity of the GMR sensors is reduced by transverse annealing process. The magnetical response of the GMR sensors and the angle response, the uniformity and power spectrum density of noise of GMR single strip sensor are tested systematically.

通过横向退火工艺降低GMR传感器的矫顽力，然后系统地测试了三种传感器的磁场响应和GMR单条传感器的角度响应、均匀性和噪声等性能参数。

The present experiment demonstrated that the unhomogeneity of surface tension induced by gradient magnetic field near the surface of liquid could lead to surface deformation, the quantity and direction of deformation are directly related to the distribution of gradient filed, and a new way to the research of the kinetics of Buoyant-Thermcapillary Convection is proposed.

得到了结论：液体表面附近处的梯度磁场将引起表面张力的不均匀而使其发生变形，变形量及方向与磁场强度和梯度的空间分布有直接关系，为浮力-热毛细对流的相关研究提供一种新的途径。

The calculated and experimental results show unsymmetrical space distribution.

计算与实验结果显示，在瞬态换流过程中，环路周围的磁场呈不均匀分布。

We first prove a formula to calculate the magnetic field in the internal region of magnetized objects on the viewpoint of magnetization, and then use the formula to define the point-function demagnetizing tensor and also prove some properties of the tensor. Finally we use this formula to construct a new method to predict the induced magnetic field of naval vessels in a nonuniform applied field, and we call it 'the Magnetization Method', in which the point-function demagnetizing tensor is used.

首先证明了一个基于磁化观点的铁磁物体内部磁场强度计算公式，随后通过该公式导出了点函数去磁张量的概并证明了它的一些性质，最后利用此公式构造了一个预测非均匀外场中舰船感应磁场的新方法——磁化强度法，且在该方法中用到了点函数去磁张量。

In MRI system, magnet system is the main part that generates imaging magnetic field. Its performance is an important factor to affect image quality. Therefore, the research on methods for magnet system has important theoretical and applied values. Magnet system is mainly composed of magnet and shimming component.

在磁共振成像设备中磁体系统是一个重要的组成部分，负责产生均匀静磁场，为磁共振成像提供基础物理环境，其性能的优劣是决定磁共振图像质量的重要因素，也是衡量整个成像系统性能的主要参考指标，因此具有重要的研究意义。

Experience shows that the introduced magnetic field can give an effective intervention to the transition of droplet, flowing of molten bath metal, crystalline and nucleation of molten bath and the process of crystalline growth. The magnetic field promotes the refining degree of primary crystallization structure , decreases the chemistry non-homogeneity, So it can strengthen hardness and wearing resistance of weld metal overlay and improve quality of surfacing deposit.

实践表明，利用外加磁场对焊接中熔滴的过渡、熔池金属的流动、熔池的结晶形核及结晶生长等过程有显著作用，使堆焊层的一次结晶组织细化，控制硬质相的分布，减小化学不均匀性，从而提高了堆焊层金属的硬度和耐磨性，全面改善堆焊层的性能。

To improve the magnetic field homogeneity, therefore, a cylinder magnet from several crescent-shaped magnets is presented.

为此，采用一种具有磁化方向近似线性分布的离散新月形磁块构成圆柱形磁体以改善二极磁场的均匀度。

So,if we use common magnet and Hore component to measure the movement of the object,we can only measure in a small area. If we want to compose in a larger area a uni-gradient magnetic field,the device will be too complicated and unfit for move. It will restrict the application of Hore component in displacement measuring.

若能在简单磁场的条件下，通过自动跟随系统驱动霍尔元件跟随测量移动物体的位移，使霍尔元件尽可能地保持在均匀梯度磁场内，就可以在很大程度上增加测量范围。

In addition, staggering the joint gap between the magnets and precisely magnetizing the permanent magnet facilitate enhancing the uniformity of the magnetic field in the working region.

另外，错开磁体间安装接缝和对永磁体精确充磁能够有效提高工作区域磁场分布的均匀性。

But uneven deposition rate along the radius of the sample holder is also found by infrared analysis technology when sample is deposited in magnetic field profile,which is produced by the coil current with 137.7A if the SmCo permanent magnet is equipped under the substrate holder.

通过红外吸收谱技术分析，虽然样品台下面放置钐钴永磁体并使磁场线圈电流为137.7A下能得到最大的沉积速率，但是沿样品台半径方向沉积速率呈现很明显的不均匀分布。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。