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A mathematic model of a self-sensor was established by analyzing the moving-magnet linear motor of a linear refrigerator compressor, and measurement and control methods of piston displacement were achieved.

通过对直线冰箱压缩机的动磁直线电机的等效电路进行分析，建立了活塞位移自传感器的数学模型，得出了压缩机活塞位移的检则及控制方式。

The mathematical models of mechanical system, thermodynamic system and electromagnetic system of a compressor driven by moving-magnet linear motor were established on the basis of the control method that piston's displacement is changed by changing the triac's time of flow.

通过控制三端双向可控硅的导通时间来控制活塞位移的方法，建立了动磁直线电机驱动的压缩机的机械系统、热力系统及电磁系统数学模型。

These results show that the choice of pole number and slot number has a significant effect on the performance and the proper choice of the pole-slot number combination and pole embrace can weaken the effect of output voltage harmonics and reduce usage of magnet material,as well as save cost,which are helpful to obtain the better performance.

结果表明：极槽匹配对直驱式风力永磁发电机性能有很大影响；通过合理选择极数、槽数以及极弧系数，可以减少输出电压谐波分量的影响，降低永磁材料的使用，节省成本，有助于直驱式风力永磁发电机获得良好的性能。

1The structure of the pole piece and permanent magnet were designed.

本文对用于真空镀膜机上的传动控制轴密封装置进行了设计，替代了原有的焊接金属波纹管密封。

Magnet, which can offer adsorbability enough to keep the robot working on the vertical walls, is kept close to the outside surface of the pedrails. Front-wheel driving is adopted as the driving system and the two front-wheel are drived by two elctromotors, respectively. When the two motors are running with the same direction, the robot walks straightly. When the two motors are running with the contrary velocity, the robot can swerve.

本文设计的压力容器检测爬壁机器人采用履带式移动机构，双履带构成爬壁机器人的基本框架；采用永磁吸附方式，将永磁片贴在履带的外表面，可提供足够大的吸附力，结构简单；采用前轮驱动，两个驱动轮分别由电机驱动，当两电动机转速一致时，机器人沿直线行走，当两电动机差速时，可实现爬壁机器人整体转弯。

As the larger manufacturer in terms of production scale of the same fields, the company is major in the production and sale of sationery, garment accessory, plastic, hardware and needle products of high quality, which is formed into a series of map pins, pearlized plastic head pins, magnet button, shirt pins, steel pins, hundreds of products.

本公司主要生产、销售文教用品、服饰用品、塑料、五金用品、针制品，形成图钉、珠光针、磁石、衬衫针、大头针五大系列，百余种产品。产品品质精良，是中国国内同行业中生产规模较大的生产厂商。

As you max the dial, you'll have more brake at middle, but brake at high speed is still on the line of magnet profile, not exponential.

当你把报盘调到最大，在中速时的制动会更大，但是刹车在高速时仍然按照线性的刹车参数，不是指数参数。

The last one is to change a YBCO bulk into a superconducting quasi-permanent magnet, levitation force of a YBCO bulk with 40 mm in diameter is up to 218.3N at 5mm gap over a NdFeB guideway at 77K by this method.

第三方法是将YBCO块材变成准永久磁体，此种情况下，直径为40mm的圆柱状YBCO块材在77K温度下5mm悬浮间距时的悬浮力高达218.3N。

NdFeB,the 3th generation of rare-earth permanent magnet,is produced by powder metallurgical method with neodymium(rare-earth metal),iron and boron.

第三代稀土永磁---NdFeB主要是由稀土材料金属钕和铁及硼通过粉末治金的制造工艺生产而成。

Key words: new; permanent magnet; wind power; motor; design

要害词：新型；永磁；风力；发机电；布局设计。

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。