查询词典 permanent field

With the need, the researchers used are: permanent magnets,electromagnetic Helmholtz coils and solenoids as magnetic field devices.

由于实验的需要，研究人员常用的磁场发生装置有：永磁铁、电磁铁、亥姆霍兹线圈和螺线管。

Rare earth permanent magnet is used widely in components producing strong magnetic field, such as various micro special electric machine, nuclear-magnet resonator, electric device, magnetic separation equipment, magnetic machine, and magnetic therapy appliance of computer, automobile, apparatus, instrument, household electrical appliance, petrochemical, medical care, and aerospace, etc.

中国钢铁—山东冠洲稀土钕铁硼永磁材料广泛应用于计算机、汽车、仪器、仪表、家用电器、石油化工、医疗保健、航空航天等行业中的各种微特电机，核磁振共振设备、电器件、磁分离设备、磁力机械、磁疗器械等需产生强间隙磁场的元器件。

The presented diagnosis approach was validated by induction motor variable voltage and variable frequency control system as well as permanent magnet synchronous motor field-orientation vector control system.

为保障诊断的有效性和可靠性，提出采用开关信号上升沿延时的方法来避免因IGBT开通和关断延迟造成的误诊断，并给出延时时间的确定方法。

Based on the analysis of calculation theories on magnetic field and torque of permanent magnetic gears, the characteristic curve of torque-angle are calculated with the use of Ansoft electromagnetic calculation software.

本文在分析永磁齿轮磁场和转矩计算理论的基础上，利用Ansoft 电磁计算软件计算了平行轴永磁齿轮的矩角特性曲线，并研究了恒定负载下永磁齿轮的转速波动情况。

Design consideration and design methods for periodic reversal permanent magnet focusing system are presented ,special technical problems met in design of multi-beam electron gun with controlling electrode are discussed.2D computer software or magnetic field and electron trajectory of electron optics system has been established,and applied to calculate the electron optics system of S-band 200 kW multi-beam klystron.

给出了周期反转永磁聚焦系统的设计方法和设计考虑，讨论了控制极调制多注电子枪设计中遇到的特殊问题和解决方法，建立了计算电子光学系统的二维磁场和电子轨迹计算软件，并应用这些软件设计和研制了S波段200kW多注宽带速调管的电子光学系统。

In the numerical computation, a two-dimensional numerical method integrating finite element method and difference method was employed, where the finite element method is used to calculate the magnetic field of the permanent magnetic guideway and the difference method is used to calculate the induced current in the superconductor, then the levitation force and the lateral force were calculated by Lorentz formula.

在数值计算部分，实现了一种集有限元法与差分法为一体的数值计算方法。

Using the principle of linear superposition, the magnet field distribution of one or several permanent magnet rings can be obtained.

根据矢量迭加原理，应用该公式可计算1块至多块永磁环并列放置时其外部空间的磁场分布。

So Fe/Pt nanocrystal permanent magnets have been used in the field of medical instrument and high density magnetic recording.

这些特性使其在高密度磁光记录材料和各式各样的微电器件方面有着很好的应用前景。

Because the 2nd harmonic of self inductance is larger than that of the mutual inductance, which is not agree with Park transform, so the saturated mathematical model under a, b, c phase coordinate system of pulsating magnetic field permanent magnet low speed synchronous motor is constructed.

利用有限元方法计算了脉振磁场永磁低速同步电动机参数变化规律，由于自感二次成分远大于互感二次成分，不满足Park变换条件，在a、b、c相坐标下建立电机饱和数学模型。

Fe3O4 and fixed permanent magnetic powders were chosen as the source of magnetic field and added into the culture medium.

其中，永磁粉分别以橡胶片固定和海藻酸钠-明胶包埋的方法固定。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。