查询词典 permanent field

A NdFeB permanent magnet is used to be a source of the magnetic field and the sealing medium is BH-1 ferrofluid made at BUAA.

0引言 铁磁流体密封是一种新近发展起来的密封技术，它具有广阔的应用前景。

The Magnetic Stereotaxis System is a unique less-invasive interventional operation device that is designed to deliver a small permanent pellet and an attached catheter directly into the vasculatures or soft tissues of a patient to perform complicated surgical operations under the control of spatial magnetic field distributions.

摘要磁导航外科手术系统是通过计算机控制磁场的空间分布，使预先植入人体内的铁磁小珠按照规定的路径运动，直接作用于患处或引导介入式导管在人体内进行各类复杂外科手术操作的一种新型介入式微创手术装置。

Under the function of the permanent magnetic field force, skillfully superpose and combine all sorts of machinery motion modes and make them get and reflect the mechanism originality of the unprecedented multidimensional space motion.

在永磁场力的作用下，巧妙地迭加、组合、各种类型的机械运动形式，使之获得并体现前所未有的多维空间运动机构创意。

Along with magnetism of magnetic material being improved, compacter design for coupling magnetic field and modern technics being advanced continuously, the design ways for small type of permanent magnetic wind power generator having been optimized continually.

随着磁性材料磁性能的提高、耦合磁场更为紧凑的设计和现代工艺技术的不断提升，对小型永磁风力发电机的设计思路不断更新和优化。

The AlNiCo permanent magnetic material is easily demagnetized because of its rather low coercivity under the reverse magnetic field low coercivity or vibration or touching the iron product.

铝镍鈷永磁材料的矫顽力较低，故易受反向磁场冲击、振动及铁器接触等因素的作用而发生某种程度的退磁。

With electrical products becoming miniaturized,it is more difficult to measure the magnetic field caused by permanent magnets in them.

随着电工产品的小型化、微型化，对其所含的永磁体进行磁场测量的难度增大。

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。

To improve the output spectrum of magnetron and make simulated model near to the practical structure,considering the practical structure of the permanent magnet and soft magnet,the magnetic field system of microwave oven magnetrons was modeled and simulated using MAFIA.

为了改善磁控管的输出频谱，使模拟结构更接近实际情况，考虑了磁钢和极靴的实际尺寸。

In order to study the open-phase operation characteristics of line-start rare-earth permanent magnet motors,the field-circuit-motion directly coupled model for open-phase operation was established.

为了研究自起动稀土永磁电动机断相后的运行特性，建立了断相运行的场—路—运动直接耦合时步有限元模型。

The emergence and population dynamics of M. aquaticum in transplanted rape fields was studied by survey of permanent quadrats and random quadrats, and field trials for herbicide screening were further conducted to develop the control strategy.

采用固定样方和随机样方法研究了移栽油菜田牛繁缕的出苗规律及在田间的种群动态，结合除草剂筛选进一步探讨了其控制策略。

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。