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ABSTRACT The researches of this thesis are carried out around the development of high performance machine tool spindle permanent magnet synchronous motor and its drive system. Five parts are included: First of all, concerning the operating characteristics of the machine tool spindle drive system, the optimum current control strategies of spindle PMSM are determined; The design rules of spindle PMSM's key parameters are summarized, based on the study on the influences of the design parameters on the performances of the PMSM operating at different current control strategies; The practical methods to improve the flux-weakening ability of the PMSM are presented; Based on the analysis and comparison of the operating performances of PMSM with different rotor structures, a novel PMSM rotor structure, which is of excellent mechanical performance, suitable for fluxweakening operation and can improve the torque output capacity in the same time, is presented.

本文围绕高性能机床主轴永磁同步电动机及其传动系统的设计研究展开，所做工作主要包括五部分：首先，确定了主轴永磁同步电动机定子电流的最优控制策略；通过对不同控制策略下主要设计参数对主轴永磁同步电动机性能影响的计算研究，总结了参数设计规律；提出了永磁同步电动机弱磁扩速的实用措施；在分析比较不同转子磁路结构电机的性能，尤其是弱磁扩速能力的基础上，提出了一种机械性能优越，易于弱磁扩速，同时能保证电机恒转矩运行时的转矩输出能力的新型转子磁路结构。

I am sure he cant outsmart all five of us.

我相信他不会比我们五个加在一起聪明。

A reoccurring topic in all five videos is the overactivity of the body and the loneliness of the heart.

在感性上，如果说这些影像镜头有什么不变的元素，那便是行为的忙乱以及心的寂寞。

Then he touched a spring in the wall and slowly the panelling slid open, and behind it were the steel safes, five, no, six of them, all of burnished steel.

他按动墙上的一个按钮，镶板徐徐打开，里面全是钢制的保险柜，有五个，不，是六个，它们全都是用锃亮的钢做的。

Now super five, six types of network cable, all kinds of jumpers, modules, panels, patch panel, network cabinets and other products in the domestic and international markets continue to improve the competitiveness of products are exported to many countries and regions.

现在超五类、六类网络线、各种跳线、模块、面板、配线架、网络机柜等产品，在国内国际市场上的竞争力不断提高，产品远销多个国家和地区。

Over the past five years, never a customer, they all stood up from the pawnshop bought himself a "heart".

五年来，从来没有一位顾客失约，他们都按时从当铺赎回了自己的"心。"

RESULT: The activity and drinking of mice who had proceeded bone marrow transplantation after 60Co total body homogeneous radiation was no significantly different with normal mice, but their pelage became grey, blood samples detection were also same with normal mice after five weeks of bone marrow transplantation, the proportion of GFP positive cells in bone marrow cells achieved 59.62±13.21% proved by laser confocal microscopy, all these evidence proved the bone marrow reconstitution had been finished in the recipients.

结果： 60Co全身均匀照射后进行骨髓细胞移植的骨髓移植组小鼠的活动与饮食与正常小鼠无明显差别，只是毛发渐变灰白，五周后其血常规与正常鼠相较无明显差异，流式细胞仪检测显示其骨髓细胞中GFP阳性细胞的比例也达到59.62±13.21%，提示骨髓重建成功。

Of course, if this all sounds way too complicated, you can simply ask for a five inch bit and there is a pretty good chance it will fit your horse, unless you have a breed like the Percheron or a Miniature.

当然，如果这一切听起来方式过于复杂，您可以简单地要求一个5英寸位，并有一个不错的机会，它将适合你的马，除非你有一个品种一样， percheron或一个缩影。

After several decades, the tireless efforts of several generations of people, has now developed into a provincial owned paint Institute, 8 production base, five branch offices and 24 holding subsidiaries specializing in the production of paint coating integrated enterprises, production 18 major categories of more than 3000 varieties, varieties have polyester, polyurethane, nitro, perchlorethylene, acrylic, epoxy, silicone, alkyd, natural resins, phenolic, asphalt, etc., are widely used in automobile, heavy industries, ships, bridges, sports facilities, chemical, pharmaceutical, power plant, metallurgy, electronics, light industry, food, city utilities, roads, railways, household appliances, furniture, architecture, decoration and other social production in all aspects of life.

经过几十年、几代人的不懈努力，现已发展成为拥有1个省级涂料研究所、8个生产基地、5个分公司及24个控股子公司的专业生产涂料油漆的综合企业，生产18大类3000多个花色品种，品种有聚酯、聚氨酯、硝基、过氯乙烯、丙烯酸、环氧、有机硅、醇酸、天然树脂、酚醛、沥青等，广泛用于汽车、重工业、船舶、桥梁、体育设施、化工、制药、电厂、冶金、电子、轻工、食品、城市公用设施、公路、铁路、家电、家具、建筑、装修等社会生产生活的各方面。

Since its inception, through the joint efforts of all staff, the establishment of a good production conditions, management system, as well as the surrounding perfect matching services, to create a five-Lake fiberglass boat the rapid development of tourism.

公司自创建以来，经全体员工的共同努力，建立了良好的生产条件，经营管理体制，以及完善的周边配套服务，造就了五湖玻璃钢旅游船的飞速发展。

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。