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And the thesis is divided into 4 parts.In the first part, the development of technology on Adjustable Speed AC Dirve is introduced. And the theory of DTC is analyzed. Besides the two classic DTC strategy, the hexagon flux track and approximate circle flux track controlling system, the thesis introduces some DTC strategies modified and some new controlling arithmetics.

论文共分为四个部分：第一部分介绍了交流调速技术的发展，分析了异步电机直接转矩控制的基本原理，除六边形磁链和近似圆形磁链两种经典的DTC控制之外，还介绍了改进型DTC及其他新型的控制算法。

Three-dimensional hard disk protection popular talking point is to protect your online time of this run before a sudden shock or collision, which leads to the hard disk heads and the track among the contacts and damage the hard disk of the head and track.

三维硬盘保护通俗点讲就是保护你的上网本在运行的时候突然收到震动或碰撞，而引起的硬盘当中的磁头和磁道的接触，损害硬盘中的磁头和磁道。

Some of the hard disk to allow each track to rewrite the servo information, and to re-track a serial number given.

有些硬盘允许将每个磁道的伺服信息重写，并给磁道重新赋予一个编号。

It is worth noting that do not mean the hard disk space and zoning Bad Track contains too tight around Bad Track should have the appropriate "good" and space as a buffer.

值得注意的是，不要为吝啬硬盘空间而把含有坏道的区划得过分紧凑，坏道周围应留有适当的"好道"空间作为缓冲。

The construction precision control point of chord surveying method for ballastless track ballast bed is introduced, including design of control system, layout of chord point, rational range of circle distance, control point of laying track and chord surveying.

介绍了无碴轨道道床竖曲线弦测法施工精度控制要点，即控制体系的设计，弦线点的设置，矢矩的合格范围以及轨排铺设和弦线量测的控制要点。

Only one child played on the disused track, the rest on the operational track.

只有一个小朋友选择在已停用的铁轨上完，其他的小朋友都在仍在使用的铁轨上玩。

In accordance with the current research state of track circuit and the domestic practical demand, digital simulation modeling of track circuit working state analysis and antiinterference analysis is studied in this dissertation, as well as the design and realization of the digital simulation program.

论文针对当前轨道电路系统的研究状况和国内的实际需求，研究了轨道电路工作状态分析和抗干扰特性分析数字仿真模型的建立、数字仿真程序的设计与实现等问题。

In 1990s, the "double-track" system had been used. But after 1990s, the "sigle-track" system had been established.

在20世纪90年代前采用的是"双轨制"的质量保障体系，90年代后建立并发展至今的新的质量保障体系采用的是"一轨制"。

Because of which, the 3369 kilometers new line of track- laying, 2856 kilometers double-track laying had been completed.

完成新线铺轨3369公里、复线铺轨2856公里，投产新线1600公里、复线1790公里、电气化铁路2630公里。

Therefore, the author studied speculative activities and government countermeasures under the double-track price system in two periods, and at the same time put forward the core viewpoint of this article: China's M2/GDP changes derive from speculation and control arranged by the double-track price system.

如同麦金农在提出了自己的宏观模型之后转入关于金融深化的政策讨论一样，我们在新模型的基础上也进行了类似的研究，将着眼点集中在中国市场化改革过程中一项极具特色的体制安排——价格双轨制上。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48