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It lacked the technology for the huge turbines needed to generate electricity, or the high-tension power cables to transmit it.

至于发电所需的巨型涡轮以及传输电力所需的高压电缆，中国也缺乏制造技术。

As the one of th most efficient wind energy utilization equipment,the horizontal axis wind turbines have been widely used in the world.

水平轴风力机是最有效的风能转换装置之一，在世界各地得到了广泛的应用。

There are four main topics in this paper:(1) improvement of BP networks algorithm;(2) improvement of BP networks structure, and applying the improved BP networks to the prediction of the time series with certain increasing or decreasing tendency;(3) using the BP networks to diagnose the vibration faults of steam turbines;(4) prediction on the cleanliness rate of steam condenser and the fuzzy diagnosis for condenser based on BP networks.

本文主要研究了四个问题：(1)完善和改进了BP网络的训练算法；(2)BP网络结构的改进研究，并将其应用于汽轮机故障这类有确定性递增趋势的时间序列的预测中；(3)BP网络应用于汽轮机的振动故障诊断研究；(4)基于BP网络的凝汽器清洁率的预测方法及模糊诊断研究。

The impact of parallel operation of wind turbines on power flow is analyzed, in which the squirrel cage induction motors are used as the constant speed wind turbine and the double fed induction motors are used as variable speed wind turbine.

分析了以鼠笼感应电机作为发电机的定速风电机组和以双馈感应电机作为发电机的变速风电机组并网运行对系统潮流的影响，并对不同控制模式下使用双馈感应电机的变速风电机组的电压和无功控制特性进行了比较。

In the near future our country imported some 9FA type gas turbines with high effect,low infectant released.

我国近期引入了一批以天然气为燃料的9FA型燃气轮机发电机组，效率高，污染物排放低。

The wind turbines can change the wind power to mechanical energy using the impeller and transmit the mechanical energy to a gear accelerating device, after joggle of one big gear and one or multiple small gears, each small gear can drive a generator to generate by a flexible projecting shaft set coaxially with small gears and provided support for small gears.

所述风力发电机组可利用叶轮将风能转化为机械能，并将机械能传递给齿轮增速装置，经过一个大齿轮与一个或多个小齿轮啮合后，每个小齿轮可通过为其提供支撑并与其同轴布置的柔性悬臂轴带动一个发电机发电。

In the case of wind turbines operating in parallel with the mains, a fixed mains frequency is assumed.

在风机与主电网并行运行情况下，应设定固定主电网频率。

Main products are wind turbine control system which applied to the wind turbines with Megawatt power and wind park management system.

作为科工贸一体化的高科技企业，我们拥有一批优秀的研发，生产，质量管理技术人才及成套技术，并配备有专业的现场调试和维护人员。

Large wind turbines can produce many megawatts of energy.

大型风力涡轮可以产生数以兆瓦的能量。

Vestas sold 600 megawatts worth of turbines in China last year.

去年该公司在中国销售的涡轮总发电产能为600兆瓦。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。