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magnet     
相关语句
  
     Study on the Magnet System of Microwave Tubes
     微波管中永结构的研究
短句来源
     High Performance Direct Torque Control for Permanent Magnet Synchronous Motors
     高性能永同步电机直接转矩控制
短句来源
     Flux Weakening Technology Study on Permanent Magnet Brushless D.C.Motor
     永无刷直流电机弱技术研究
短句来源
     Investigation for Influence of Preparation Parameters and Component on Microstructure and Magnetic Properties for Nanocomposite Nd_2Fe_(14)B/α-Fe Permanent Magnet
     制备工艺和合金成分对纳米复相Nd_2Fe_(14)B/α-Fe永材料的结构与性能影响的研究
短句来源
     Principle and Experimental Research of Micro Permanent Magnet Type Bearingless Motor
     微型无轴承永同步电机的原理与实验研究
短句来源
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  磁体
     Studies on Electromagnetic Properties and Application of Polymer Magnet/ Inorganic Composites
     高分子磁体/无机物复合材料的电磁性能与应用研究
短句来源
     Injection Molding of High Performance Anisotropic Nd-Fe-B Bonded Magnet
     高性能注射成形各向异性Nd-Fe-B粘结磁体的研究
短句来源
     ON THE HYSTERESIS LOOPS OF LIQUID-PHASE-SINTERED SmCo_5, PERMANENT MAGNET AT VARIOUS TEMPERATURES
     液相烧结SmCo_5永磁体磁滞回线与温度的关系
短句来源
     Analysis and Calculation of the Dynamic Behaviour of the Pulse-supply System for the Ring-type Magnet
     环形磁体脉冲供电系统动态特性的分析与计算
短句来源
     THE STABILITY OF SmCo_5 PERMANENT MAGNET DURING LONG-TERM AGING
     SmCo_5永磁体的长期时效特性
短句来源
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  磁铁
     Maglev control of single magnet based on 80C196MC
     基于80C196MC的单磁铁悬浮控制
短句来源
     Deflecting magnet work principle of VARIAN2300C/D linear accelerator and elimination of BMAG concatenation
     VARIAN2300C/D直线加速器偏转磁铁的工作原理及BMAG连锁的维修
短句来源
     270°Bending magnet system for 14 MeV medical electron LINAC
     14 MeV医用电子直线加速器上270°偏转磁铁系统
短句来源
     Design and Analysis of the Hybrid Magnet in EMS Maglev Vehicles
     混合EMS型磁浮列车的悬浮磁铁设计与分析
短句来源
     DEVELOPMENT ON 60 A/200 V TRIANGULAR WAVE FORM POWER SUPPLY FOR HEAVY IONS SCANNING MAGNET
     60A/200V 重离子扫描磁铁供电三角波电源
短句来源
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  磁石
     As a new type of American school, charter school, along with the free school, magnet school, home school, and contract school are all part of the Alternative School Movement in the USA dated from the end of 1960s.
     作为美国的一种新学校类型,特许学校和自由学校、磁石学校、家庭学校、契约学校一起同属于20世纪60年代末兴起的美国学校选择运动的一部分。
短句来源
     Further, it has, like a forceful magnet, pulled to itself the fibers of many contemporary concerns: feminist, modernist, postmodernist, Marxist, psychoanalytical, philosophical, social, and economic.
     它的魅力犹如一块磁石,使它的周围聚集了当代各种流派的评论家:从女权主义到现代主义、后现代主义再到马克思主义,从心理分析到哲学、社会学再到经济学。
短句来源
     While the scientific nature of it, like magnet, has been drawing the attention from the people to constantly probe and further research on it for hundreds of years.
     而这种科学性又像磁石一样,几百年来吸引着人们不断的探索与深入的研究。
短句来源
     The theory basis is given that using the model of magnetic dipoles to substitute the magnet model.
     给出利用磁偶极子模型代替小磁石模型的理论及实际依据。
短句来源

 

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      magnet
    Synthesis, crystal structure and magnetic properties of single-molecule magnet: [Mn4(CF3COO)4(hmp)6]
          
    The presence of a frequency-dependent alternating current susceptibility signal indicates that the individual molecule is acting as magnet.
          
    Analysis and Design of Hybrid Excitation Permanent Magnet Synchronous Generators
          
    On the basis of a conventional permanent magnet (PM) synchronous generator's construction, a novel kind of Hybrid Excitation Permanent Magnet Synchronous Generator (HEPMSG) is introduced by inserting exciting winding in the stator or rotor.
          
    When designing a universal finite element software for analyzing a permanent magnet synchronous motor, the relative position of the stator and rotor remains unknown.
          
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    For the determination of the temperature coefficients of magnets, an improved system for quickly stabilizing the temperatures is used. A current coil to compensate the magnetometer deflections due to the change of the magnetic moments, simplifies the calculating work. In the determination of the coefficient of linear expansion of magnet, a simple device is used in conjunction with the available instruments and sufficiently accurate results are obtained. In the determination of the induction coefficient...

    For the determination of the temperature coefficients of magnets, an improved system for quickly stabilizing the temperatures is used. A current coil to compensate the magnetometer deflections due to the change of the magnetic moments, simplifies the calculating work. In the determination of the coefficient of linear expansion of magnet, a simple device is used in conjunction with the available instruments and sufficiently accurate results are obtained. In the determination of the induction coefficient of magnet, the uniformity of the field of a solenoid(Nelson's method) is examined by calculating the field at several points in the coil, thus its effects can be estimated more surely. The magnetometer attachment for the determination of the induction coefficient, which is not complex and rather accurate, is described.

    測定磁棒磁矩的溫度系数时,用了一个电流綫圈以抵消磁矩变化的影响,因而簡化了計算工作。測定磁棒的綫膨胀系数时,利用現有設备及一个比較簡单的装置,得到了相当准确的結果。測定磁棒感应系数使用的螺綫管(納尔逊法)中磁場的均勻性,在纵方向及横方向都作了核算,因而对它們的影响,能进一步加以估計。綫圈及其他磁强計附加装置也还准确而簡单易制。

    The possible forms of the anisotropic interactions between d electrons in cubic ferro-magnets in the theory of the polar model of metals are studied. Their contributions to the magnetic anisotropic constant K1(T) are calculated based on Dyson's theory of spin wave interactions with the method of the statistical perturbation theory. The accuracy of the calculation is restricted to the first order of the coupling constants of anisotropic interactions, and the results are given up to the T4 terms. It is shown...

    The possible forms of the anisotropic interactions between d electrons in cubic ferro-magnets in the theory of the polar model of metals are studied. Their contributions to the magnetic anisotropic constant K1(T) are calculated based on Dyson's theory of spin wave interactions with the method of the statistical perturbation theory. The accuracy of the calculation is restricted to the first order of the coupling constants of anisotropic interactions, and the results are given up to the T4 terms. It is shown that K1T) varies roughly as the tenth power of the spontaneous magnetization in the temperature range where the theory is reasonable.

    本文研究了金属极性模型理论中立方铁磁体的d电子之间各向异性相互作用的可能形式,并根据Dyson的自旋波相互作用理论用统计微扰论的方法计算了它们对磁各向异性常数K_1(T)的贡献。计算进行到T~4的项,在计算中保留到各向异性作用常数的一次方。所得到的K_1(T)的温度依赖关系,在理论适用的温度范围内,基本上正比于自发磁化强度的10次方。

    Some investigations on the titanium-containing (~5% Ti) and higher cobolt content (~34% Co) permanent magnet alloy[1] recently developed upon the basis of the composition of Alnico 5 are reported in this paper. It is shown that superior permanent magnetic properties may be obtained by means of isothermal magnetic treatment as compared with those obtained by controlled cooling rate treatment, confirming the experience of Koch et al. It has been found that the coercive force is very sensitive to the temperature...

    Some investigations on the titanium-containing (~5% Ti) and higher cobolt content (~34% Co) permanent magnet alloy[1] recently developed upon the basis of the composition of Alnico 5 are reported in this paper. It is shown that superior permanent magnetic properties may be obtained by means of isothermal magnetic treatment as compared with those obtained by controlled cooling rate treatment, confirming the experience of Koch et al. It has been found that the coercive force is very sensitive to the temperature of isothermal magnetic treatment. The structural states of isothermally-magnetically treated specimens were investigated by means of electron microscopy and other means. The results indicate that different conditions of prior isothermal magnetic treatment lead to states of different dispersion and morphology of the a'-phase, and hence to different permanent magnetic properties. The experimentally determined C-curve of γ1-phase shows that the precipitation of the γ1-phase is very rapid. Careful metallographic examination has revealed that the so called ar -phase is actually heterogeneous. The experimentally established quantitative relationship between the permanent magnet properties of the alloy and the content of the "ar-phase" clearly demonstrates the detrimental effect of the latter on the former.

    本文报导了近几年来在吕臬古5成份基础上发展起来的含钛(~5%)高钴(~34%)吕臬古永磁合金所作的若干研究。试验证实,通过恒温热磁处理,可以获得远较控速处理为优异的永磁性,肯定了Koch等的经验;发现矫顽力对恒温热磁处理温度极为敏感。对恒温热磁处理的样品的结构状态,进行了电子显微等的研究,表明由于事先的恒温处理条件不同,造成了α′相的不同分散度、不同形态和不同的永磁性。求得的r_1相的C曲线表明r_1相脱溶很快。仔细的金相研究发现,所谓的α_r相实为多相。基于试验建立的永磁性与“α_r相”含量的定量关系,清楚地揭示了“α_r相”对永磁性的危害作用。

     
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