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This paper discusses the principle of the torque ripple of BLDCM with focuses on the theoretical analysis of the relationships between torque ripple and parameters of windings,motor speed and bus voltage,as well as 3-phase reverse electrodynamic potential during phase converting.

对永磁无刷直流电机的换相转矩脉动的产生机制进行了分析，主要从理论上探讨了换相引起的转矩脉动与电机绕组的参数、换相期间的三相反电动势、电机的运行速度及母线直流电压等之间的关系。

Of our predecessors by improving extraction technology, used solid-phase extraction way to extract a separation, that is, the AB-8 macroporous resin for solid phase, ethanol - water eluate, through multiple-eluting And constantly improve the preparation of conditions, from the extract of red flowers in the isolated flavonoids components.

对前人的提取工艺进行了改进，用固相萃取的方式对提取液进行了分离，即以AB－8大孔吸附树脂为固相，乙醇－水为洗脱液，通过多次洗脱，不断优化制备条件，从红花的提取物中分离出黄酮组分。

It is observed there are two phase transitions at about 400℃ and 850℃ in each sample before melting, respectively. By careful measurement it shows the amounts of weight loss and endotherm, along with T, decrease with the dopant increasing when phase transitions occurred.

热分析发现熔化前在400℃和850℃分别存在2个相变，仔细测量得出相变发生时随掺杂量增加，失重量和吸热量减少，超导转变温度T降低。

Also there is much difference between the obtained metastable phase diagram at 35 ℃ and the metastable phase diagram at 25 ℃. The crystallization regions of schoenite(K2SO4*MgSO4*6H2O) and epsomite disappear and arise the crystallization regions of leonite and kainite.

所得35 ℃介稳相图与25 ℃介稳相图区别很大：软钾镁矾和七水硫酸镁结晶区域消失，同时出现了钾镁矾和钾盐镁矾的结晶区域。

A large difference is found between the obtained metastable phase diagram at 35 ℃ and Vant Hoffs stable phase diagram at 25 ℃. The crystallization regions of schoenite(K2SO4*MgSO4*6H2O), epsomite(MgSO4*7H2O), magnesium sulfate pentahydrite(MgSO4*5H2O) and starkeyite(MgSO4*4H2O) disappear and the crystallization regions of leonit and astrankit are greatly incresed.

所得35 ℃介稳相图与Vant Hoff 25 ℃稳定相图比较有较大区别：软钾镁矾（K2SO4*MgSO4*6H2O）、七水硫酸镁、五水硫酸镁及四水硫酸镁结晶区域消失，钾镁矾和钾盐镁矾结晶区域显著扩大。

show that multi-wavelengths laser output can be achieved through increasing phase-shifts number and the laser wavelength varies with phase-shifts magnitude in multi-phaseshifts fiber grating with equidistance.

结论表明：等分相移光栅可以通过增加相移个数来实现多波长的激光输出，相移量不同激光波长的输出也不同。

The phase transition is analyzed by varifying the stability of the system and Gibbs condition of phase equilibrium.

本文将奇异强子物质作为一个二元体系来处理，通过讨论这个体系的稳定性和Gibbs相平衡条件来分析相变。

The conducting phase is AlxWO3 tungsten bronze that does not exist in Al2O3-WO3 equilibrium phase diagram.

AlxWO3相是在Al2O3-WO3二元系平衡相图中所没有的。

The thermodynamic phase equilibrium model and the phase diagram is the underline for any separation process.

热力学相平衡模型及相图是结晶分离研究的基础，本研究以二甲苯异构体三元系作为研究对象，通过不同的方法建立三元系的固-液相平衡热力学模型及相图。

The local phase equilibrium principle is recommended as well as the outline of the method of diffusion couples in determining the equilibrium phase diagram.

扩散偶法是一种高效的、可靠的相图测定方法，它可以大幅度减少实验工作量，减少原材料消耗，加快相图实测进程。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。