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The optimization of motor construction and adequate control strategies are main measures to reduce cogging force in a PMLM.

目前电动机几何结构优化与有效的控制策略是减小直线电动机cogging力的主要措施。

The structure and stability of all possible isomers of C50X(X=SiH2, PH, S) were investigated by ab initio HF/3-21G calculations. The calculation results indicate that the preferred position for cycloaddition of SiH2, PH, and S on C50 is consistent, i.e. on the C3-C4 and C4-C4 sites of C50, and the resultant most stable cycloaddition isomers are [5,6]-closed and [5,5]-closed structures. The main driving force governing the stability of the C50X(X=SiH2, PH, S) isomers is the strain, or the conjugative effect, or the combination of strain and conjugative effect, depending on the addition positions and the types of the attacked C-C bonds.

用从头算HF/3-21G方法研究了C50的环加成衍生物C50X(X=SiH2， PH， S)所有可能的异构体的结构与稳定性，计算结果表明，SiH2基团、PH基团与S原子在C50上环加成的优先加成位置相同，都为C3-C4类键和C4-C4类键，并且相应形成[5，6]-闭环和[5，5]-闭环结构的最稳定异构体；决定C50X(X=SiH2，PH，S)各异构体稳定性的主要因素，因加成位置以及发生加成反应的C-C键的单双键类型的不同，可能是张力、共轭效应或者二者的共同作用。

And the rock mass as the main object of most engineering practice is developed by all kinds of geotechnical action and force in the long geology history to the complex characteristic of continuous medium, crannied medium and granular medium, to the anisotropic and heterogeneous entity with elasticity, plasticity, viscidity, creepocity and rheology.

作为主要工程对象的岩体是在漫长的地质历史发展过程中经受各种地质营力作用而形成的成因和构造复杂，岩性多样且包含了连续介质，裂隙介质和散体介质特征的，兼有弹性、塑性、粘性、流变性的各向异性的非均质地质体。

Life long education is the main means to make labour force employable.

终生教育是使劳动者在劳动力市场上始终具有竞争能力的重要途径。

First, education is the main motive force and endogenous mechanism of China's modern economic growth.

通过理论分析和实证研究，对教育与经济增长的关系得到以下基本结论。

Elegant general thinks, urging the next main motive force that royal share price rises will be new network game " firmamental Online ", the operation accredit of land of the home in obtaining this game to be in grandly.

雅普认为，推动盛大股价上涨的下一个主要动力将是新网络游戏《苍天Online》，盛大已经获得了这款游戏在中国内地的运营授权。

The company had been established July, 2002, the main development and the production green edible camellia-oil, the company existing staff 37 people, senior title 5 people, the primary title 6 people, the technical worker 11 people, have the fixed asset 5 million Yuan, the annual production purify the tea oil 1,800 tons, in many years tea-oil tree processing production process, the company and the Zhejiang Province Science Academy of Foresty, the Zhejiang University, the Zhejiang Province cooking oil examination center and so on has established the good cooperation relations, therefore the project construction has the force the technical strut.

公司成立于2002年7月，主要开展和生产绿色食用山茶油，公司现有员工37人，其中高级职称5人，初级职称6人，技术工人11人，拥有固定资产500万元，年产精制茶油1800余吨，在多年的油茶加工生产过程中，公司与浙江省林科院、浙江大学、浙江省粮油检测中心等建立了良好的合作关系，因此项目建设具有强力的技术支撑。

Adding a set of fixture in the lathe,changing the gyratory motion of lathe into straight line reciprocating motion,and delivering the torque by the main shaft of lathe,supporting the broaching force by the fixture,thus reconstructing the lathe into broaching machine is realized.

在车床上增加了一套夹具装置，可将车床的回转运动改为直线往复运动，车床主轴可只输出扭矩，而由夹具装置承受拉削力，从而实现由车床向拉床的改造。

His "taro culture" greatly promoted the study in the middle and latter 20~ century in the aspects of providing viewpoint and research attitude and was a latent force in the development of Japanese hot fields in recent 30 years. Therefore Tuboi Hirofumi is not a failure in the study after the 1970s. His idea influenced the development of folklore study in the past three decades, and the study in the hot fields of urban folklore, environment folklore and triple element system justify the existence of the main thread.

因此从这个角度可以说，在70年代以后的研究中坪井洋文不再是一个败北者的存在，他发出的声音极大影响了近30年日本民俗学的学科发展轨迹，而城市民俗学、环境民俗学、三态理论之热点领域的研究也印证了这条主线的存在。

However, the water quality simulation results by CE-QUAL-W2 model revealed that the hydrologically induced density currents in winter together with the external loads of P were the main cause of the surface water quality deterioration, even though the bottom water carrying abundant P internal loads might be lifted to the middle layer by the water momentum force by the density current.

然而以CE-QUAL-W2二维水理水质模式模拟结果，翡翠水库年初表水总磷浓度突增主要是受到冬季冷水密度流造成的水体抬升及前一年停留在中层水之磷外部负荷联合贡献结果，相对地磷内部负荷虽可被抬升至中层水处，对表水的贡献有限。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。