查询词典 magnetic head

Some people introduce subphotosphere magnetic charges or dipole, which can fit magnetic field on the photosphere, then the separatrix and separator above and on the photosphere can be located, the comparison between their location and location of flare ribbon support the idea of magnetic reconnection. It is called Source Method. Some people extrapolate magnetic fields of photosphere to corona by some method, then use QSLs method to investigate the relations between flare ribbons and magnetic field topology. Some people study relations between flare ribbons and singular point on the plane above photosphere. Some people investigate magnetic topology by analyzing magnetic field of photosphere directly.

或者以观测的光球磁场为基础，来构造光球下的磁荷或磁偶极等光球下磁源，进而研究光球上的磁拓扑结构与耀斑的关系；或者利用各种外推方法将光球磁场进行外推，然后用准分隔层的方法来研究磁拓扑结构与耀斑的关系；或者利用势场模型外推光球磁场，然后研究光球之上平行于光球的某一平面的两维奇点与耀斑的关系；或者直接利用观测的光球矢量场来研究磁场拓扑。

In the dehydrogenation process of HD process, the temperature set at 580℃ and pressure set at 100Pa is a perfect parameter, it can make the magnet to have high magnetic performance. In the HDDR process experiment, the paper contrast four HDDR process such as C-HDDR V-HDDR V-HD-S-DR and d-HDDR by the anisotropy and magnetic performance of ternary NdFeB magnetic material. The results show that adjusting the parameter of the d-HDDR process can make the anisotropy and magnetic performance of ternary NdFeB magnetic powders to catch up with the hexahydric NdFeBCoZrGa magnetic powders. At the end the paper discusses the betterment of the equipment which produces ternary NdFeB magnetic with the d-HDDR process.

和580℃的脱氢温度相搭配的脱氢气压选择在100Pa左右是理想的工艺参数，这样的搭配使得最终烧结磁体综合磁性能优异；在HDDR制粉工艺实验中，本文对比了C-HDDR、V-HDDR、V-HD-S-DR和d-HDDR四种HDDR工艺对于三元NdFeB合金各向异性和磁性能的影响，得出结论：通过发展d-HDDR工艺，调整工艺参数和控制水平，可以使三元NdFeB合金磁粉的性能达到或接近六元NdFeBCoZrGa合金磁粉的水平，在文章末尾，还对配合使用d-HDDR工艺设备的改造进行了分析。

Seeing that the basic researches of the method of metal magnetic memory insufficiently, this text has done the following work mainly:(1)Studied the basic theory of the method of metal magnetic memory;(2)Studied the signal of metal magnetic memory of samples both anneals and not anneals in natural magnetic field and drive magnetic field under the drawn loads;(3) Studied the signal of metal magnetic memory of anneals samples in three magnetic fields under the drawn loads.

鉴于其基础研究工作不足，本文主要做了如下工作：(1)系统地研究了金属磁记忆检测技术的基本理论：(2)研究了退火试件和未退火试件在自然磁场和激励磁场环境中进行拉伸的磁记忆信号；(3)研究了退火试件在三种磁场环境中进行拉伸试验的磁记忆信号。

The structure could be a magnetic shield, magnetic pole of a write head or some other magnetic structure used in a magnetic head of a magnetic recording system, and has notches formed at both the front end and at the back end.

该结构可以是磁屏蔽件、写头的磁极或者是使用在磁记录系统的磁头中的某其它磁结构，且具有形成在前端和在后端两者处的切口。

Handan City-kun jump processing machinery Technology Co., Ltd. is committed to the development of magnetic equipment, manufacturing, product high Qiangci stem the election machine, demagnetizer, dehydration magnetic separator, magnetic separation column, DGS-Screen-high-frequency electromagnetic, magnetic pulley Qiangci , Adjustable magnetic reunion gravity concentrator, permanent magnet filter vacuum, magnetic separator, automatic weighing quantitative feeding machines.

邯郸市坤跃选矿机械科技有限公司致力于磁力设备的研发、制造，产品有高强磁干选机、脱磁器、脱水磁选机、磁选柱、DGS型电磁高频振网筛、强磁磁滑轮、变径型磁团聚重力选矿机、真空永磁过滤机、磁选机、自动称重定量给料机等。

The change and the distribution of magnetic field in magnetic core are described with system state equations of magnetic switch and Jiles-Atherton model so that whole operation of magnetic switch and its application circuit can be obtained, meanwhile total loss, eddy current loss and magnetic hysteresis loss of magnetic switch can be calculated.

利用磁开关的系统状态方程和Jiles-Atherton磁滞回线模型描述磁芯中磁场的变化和分布，从而得到磁开关及其应用电路的整体工作特性，同时计算出磁开关的总损耗、涡流损耗和磁滞损耗。

A mathemetical model of magnetic field in electromagnetic separation of inclusions from molten aluminum under rectangle coil and 50Hz current is presented according to the magnetic vector potential integral equation and the basic theory of magnetohydrodynamics. The magnetic field distribution in the gap of coils is simulated by the model and the actual magnetic field distribution also is measured. The experimental results show that the magnetic field distribution in the gap of coils is uniform and is consistemt with the model simulation. The magnetic field designed accord the simulated result is proved suitable in the practice.

摘 要：根据电磁流体力学的基本理论，利用矢量磁位积分，建立了在采用矩形电磁线圈和工频电源的条件下电磁分离铝熔体中夹杂的电磁场数学模型，模拟计算了电磁感应线圈气隙中的磁场分布状态，同时对制做的感应线圈的实际磁场进行了测量模拟计算磁场的分布状态与实际磁场的测量结果基本一致，都表明在电磁感应线圈气隙中磁场分布均匀，可以进行分离铝熔体中的非金属夹杂。

The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

The finite element method has been used to analyze and calculate the space magnetic fields of wafer magnets and square magnets as well as sphere magnets. Vector magnetic potential, magnetic induction, magnetic force lines and magnetic induction isolines are obtained which provide theory basis for the application of magnetic field.

采用有限元法对磁疗中常用的圆片磁源、方片磁源、球形磁源的空间磁场进行了分析和计算，得到了上述磁源空间磁场的矢量磁位、磁感强度、磁力线和磁感强度等值线等参数，为磁源的使用提供了理论依据。

Together with the measured magnetic properties of magnetic films on the magnetic recording media, the variation of the magnetic recording signal in magnetic field was studied by MFM. The smallest perpendicular and parallel elimination magnetic fields were obtained.

通过测量磁记录介质的磁特性，以及介质同一小区上的记录信息随外加磁场的变化，得到了消除磁记录介质存储信息所需的最小平行消磁场和最小垂直消磁场。

Putt your way through 36 fun-filled holes of minigolf on 3D designed courses with elevated greens, bunkers, bridges and water hazards, among other crazy obstacles.

您的推杆方式，通过36个有趣的填孔迷你的三维设计的课程，以提升绿党，掩体，桥梁和水的危害，除其他疯狂的障碍。

Some participles can be used either as attributes or as predicatives.

有些分词既可当定语用，也可当表语用。