高磁场

Using series of vector magnetograms and proper motions, we have analyzed a delta spot in NOAA 9077. This delta spot formed and disintegrated in a very special way. Its current helicity evolution has a close relationship to the magnetic configuration. We find the conclusion, for the first time, that the sign reversal of the helicity can lead to the disintegration of the compact delta structure.

为了解NOAA 9077在7月14日的三维磁场位形，我们使用无力场局部外推程序模拟它的耀斑后环，探讨了理论与实际观测的差异和可能的原因；利用源表面方法，使用MDI高精度磁场数据进行全球势场外推，探讨2000年7月14日大耀斑事件的外部触发机制。

Objective: In Order to study on biological effects of rotary magnetic field conveniently and precisely, a digital-controlled instrument for generating RMF, which is based on a single-chip microcomputer, is developed.

目的：为了更方便、准确地研究旋转磁场的生物效应，研制一种以单片机为核心的高精度数控旋转磁场仪。

The study of generated mechanism of self-generated magnetic fields in laser-produced is also commented.

研究表明：激光等离子体中的自生磁场是由横等离激元激发的，该磁场经过一塌缩过程后，成为高强度的间歇磁流。

In this paper we separate the Hamiltonian into three parts: a spherical symmetry Hamiltonian; a z-component of the angular momentum operator, and a non-spherical symmetric potential as the perturbation operator, and provide a propose method by separating the potential containing squared magnetic field B^2 into two parts spherical symmetric and non-spherical symmetric ones so that the first-order energy correction due to the non-spherical symmetric potential is zero, and the second-order correction due to B^2 can be obtained by a simple variational method.

采用变分法和微扰法相结合的方法，把高强度磁场中氢原子的哈密顿H分为三部分：球对称哈密顿；z分量角动量算符相应部分和非球对称势微扰，并用一种特别规定的分解法将哈密顿H中含磁场平方项的势能分解为球对称与非球对称两部分，且使非球对称部分引起的一级修正能量值为零，并采用一种简便的变分法直接求出B^2对能级的二级修正值。

To increase more efficiency, various wigglers were studied. Numerical simulation finds that increasing wiggler field can also increase FEL efficiency.

为了进一步提高自由电子激光的效率，本论文研究了各种磁场变化的摇摆器，首次发现增强摇摆器的磁场也能获得比均匀摇摆器更高的效率。

In the second part of the work,quantum interference induced weak-localizationeffects as well aselectron-electroninteraction effects were investigated through magnetotransport measurementsfor highly doped n-ZnSe∶Clat metallic side of metal-insulator transition(MITgrown by MBE,withmagnetic fieldfrom 0 to 1T and temperaturefrom 0.3K to 30K.

第二部分对一系列分子束外延生长的高掺杂n-ZnSe∶Cl(位于金属绝缘体转变的金属一侧)在弱磁场(0到1T)以及低温(0.35K到30K)下进行了磁输运研究，以研究Anderson局域化，由于量子干涉效应引起的弱局域化效应以及无序存在时电子-电子相互作用效应。在所有样品中观察到了负磁阻并获得了其对温度，磁场以及电子浓度的依赖关系。

The growth inhibiting rate of T24 cell lines were detected by MTT methods, apoptosis of cells were detected by flow cytometry, the mechanism of apoptosis was analyzed by detecting the protein expression of Bcl-2, Bax, Caspase-9, Caspase-3 and cytoplastic protein Cytochrome C. 4 We injected live T24 cells into the subcutaneous space of nude mice and successfully built up the animal model of bladder carcinoma. The effect of CS-PAA-EPI polymer magnetic microspheres targeting chemotherapy was investigated by HE staining, TUNEL ,tumor weight and volume inhibition rate. Results: 1 TEM revealed that the CS-PAA polymer magnetic microspheres were regular spherical shape,the average diameter was 80nm in dry condition. By controlling the pH value of the medium,polymers had positive or negative zeta potential. VSM showed the CS-PAA polymer magnetic microspheres had superparamagnetic. The diameter of CS-PAA-EPI polymer magnetic microspheres were 200nm in solution by DLS examining,the embedding ratio was 20%,the EPI loading rate was 15%, which was higer than reported in other articles. 2 Raw eye observation found that the rat"s bladder of treatment group was brown color,which meaned the aggregation of iron particles, compared with the control group, iron stain found iron particles were assembled in rat"s bladder of the treatment group, the amount of iron particles in liver and spleen were less obviously.

研究结果：1合成的CS-PAA磁性聚合物微球呈球形，大小均一，TEM测定其干态下粒径为80nm左右，磁化曲线证实具有超顺磁性，具有一定的PH敏感性，固载表柔比星后，水溶液性状稳定，无沉淀物，DLS测定直径约200nm左右，测定载药率为15％，较文献报道高，包封率为20％。2肉眼观察试验组大鼠膀胱表面呈褐色，可见大量的Fe粒子聚集，普鲁士兰染色法显示，试验组大鼠膀胱壁内有大量的Fe粒子，分布至膀胱壁全层，与对照组大鼠相比，试验组大鼠的肝、脾内的Fe粒子聚集量明显降低；HPLC测定结果与Fe染色相同；高剂量磁性CS-PAA-EPI生理盐水组及单纯EPI生理盐水组均在给药后14天出现血肌酐和尿素氮的升高，其他组大鼠血生化指标没有明显变化。3MTT法发现，高、中、低剂量磁性CS-PAA-EPI生理盐水组在外加磁场的协同作用下杀伤T24细胞效应明显高于单纯的EPI生理盐水组，FCM发现试验药物组可引起明显的肿瘤细胞凋亡，试验药物治疗组细胞胞浆内出现了由线粒体释放出的细胞色素C，试验组细胞Bcl-2蛋白减少，Bax蛋白变化不明显，Caspase-3、Caspase-9蛋白受到了激活活化。4高、中、低剂量磁性CS-PAA-EPI生理盐水组的瘤重抑制率和瘤体积抑制率均明显高于单纯的EPI生理盐水组(P＜0.01)，其中高剂量组的抑制率最高。

Homogeneous magnetic field is necessary in NMR magnet. In general shimming magnetic field is by experience. So it's difficult to shim. It depends on experiences frequently.

针对核磁共振永磁体的磁场传统匀场方法难度大，经验依赖程度高的情况，提出了人工神经网络应用于磁场匀场的手段。

The experiment shows that CSELF is potentially valuable for earthquake research and prediction. It is also found that the recorded electric and magnetic component amplitude of CSELF signal varies depending on the distance and azimuth of the observatories relative to the transmitter. These amplitudes decline with increasing distance between observatory and transmitter faster within some space extent than those outside the extent. It may be easier for magnetic components to have higher ratio of signal to noise than for electric component.

试验还发现，各地震台站和流动测点观测的CSELF信号的强度，与台站或者测量的电、磁场分量相对于发射源的距离、方位有明显的关系；发现在离开发射源的相对近区，场强随距离的衰减，比在相对远区更快；发现接收磁场信号比电场信号较易获得更高信噪比的数据。

A field coil driver uses a dedicated power supply to feed its field coil to produce the strong magnetic field that makes the diaphragm react to the incoming electrical signals and reproduce sound, the stronger the magnetic field the more efficient the driver would be and the higher and lower frequencies it will respond up to the diaphragm physical and acoustical limits.

实地线圈驱动器采用专用电源给其外地线圈产生的强磁场，使膈肌反应传入的电子信号，并重现声音，强大的磁场更有效地将司机和更高和较低的频率，将应对行动膈肌物理和声学限制。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。