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VSCF
变速恒频风力发电技术风力发电具有一些自身所拥有的特点，因此如何提高整个风力发电系统的效率、性能以及其输出电能质量，是当今风力发电研究的重点也是风力发电研究的发展方向。目前已有的风力发电技术主要有四类：定桨距调节技术、变桨距调节技术、主动失速调剂技术、变速恒频技术。因定桨距调节技术产生的时间比较早，并且现在的风力发电系统中不再使用因此不做详细介绍。(VSCF wind power generation technology)
- 2012-05-29 15:37:22下载
- 积分：1
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MS
说明： C# development book very helpful
- 2009-10-05 19:49:37下载
- 积分：1
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4kWbianxieshizhinengxudianchi
说明： 4kw便携式蓄电池的研究，对便携式的开发具有很好的指导意义，欢迎下载交流。(4kw portable battery research on the development of portable has a good guide, welcome to download the exchange.)
- 2010-03-31 20:22:25下载
- 积分：1
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flying-control-law
概述了飞行控制律设计的几种主要方法。通过对比自适应飞行控制律和程序调参飞行控制律,总结
了处于飞行控制器设计领域主导地位的程序调参飞行控制律的主要优点和不足,并就程序调参技术在现代飞控领
域的研究现状及其在某先进飞机中的实际应用进行了介绍。最后,针对现代飞机的飞行特点,展望了程序调参飞
行控制律今后可能的发展方向。
(Summarizes the flight control law design of several major method. By comparing the adaptive flight control law and procedure parameters tuning flight control law is summarized The flight controller design field is in the leading position of the program and flight control law of the main advantages and disadvantages, and the process parameters tuning technology in the modern flight control broughtThe research status and domain in some advanced aircraft in the practical application are introduced in this paper. Finally, the modern aircraft s characteristics, and looks forward to the program and fly Line control law could in the future development direction.)
- 2012-02-24 13:24:30下载
- 积分：1
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Wireless-coverage-market-
无线覆盖市场月度监测报告、行业发展报告文件(monthly monitoring report)
- 2012-03-05 10:27:17下载
- 积分：1
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Worse-is-Better.pdf
本文通过对LISP语言发展的研究，总结出计算机方面的设计理念。并不是完美的才是最好的，有时候愚蠢的简单的更好。(Based on the LISP language development research, summed up the computer aspects of the design philosophy. Not perfect is the best, and sometimes stupid simple better.)
- 2013-10-29 15:19:04下载
- 积分：1
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Real-time-detection-of-negative
同相牵引供电系统旨在实现电能质量的综合补偿。提出了一种基于同步坐标变换的电流检测方法，能实时准确地检测
出负载电流的基波正序有功分量、基波正序无功分量、基波负序分量以及谐波分量，为综合补偿提供了基础。电能质量的补
偿力度与设备容量之间存在非线性关系。提出补偿度的概念，并给出补偿度与电能质量参数的关系，通过给定电能质量期望
参数，实时调整负序、谐波以及无功补偿度，使得综合潮流控制器容量在各电能质量补偿参数之间得到实时优化配置，从而
实现同相供电系统容量优化满意补偿。理论推导和仿真结果验证了所提方法的正确性和可行性。(The cophase traction power supply system aims at achieving power quality comprehensive compensation．A current
detection method based on synchronous reference frame transformation is proposed．The method can decompose the load current
real-timely into fundamental positive-sequence active component，fundamental positive-sequence reactive component，fundamental
negative-sequence component and harmonic component，which lays a foundation for comprehensive compensation．There are
nonlinear relation between compensation strength of power quality and device capacity．The paper proposes the concept of
compensation degree and gives the relationship between compensation degree and power quality parameters．By giving expected
power quality parameters，it adjusts compensation ratios of negative，reactive and harmonics instantaneously，so that the IPFC
capacity can be allocated between power quality compensating parameters optimally and real-timely，thus achieving capacity optimal
satisfactory compensa)
- 2012-03-01 16:12:06下载
- 积分：1
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DFIG
关于DFIG的低压穿越能力的研究。对以后实现低压穿越做一些探索性的工作(Along with the sharp increase in the proportion of wind power supply some areas the impact of Large-scale wind farms for the stability of regional power grid is more significant. The research on low voltage ride-through (LVRT) of wind power system based on doubly-fed induction generators (DFIG) becomes a hot issue. In this paper ,Firstly introduces the concept of low voltage ride-through technology, The standards of LVRT of some European countries are presented, And then analyses and compares the kinds of common realize low voltage ride- technology and improve control strategy. The transient characteristics of DFIG when the grid voltage sagging.)
- 2012-03-18 16:18:38下载
- 积分：1
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中国中小企业互联网应用状况调杳报告:
近几年，中国互联网应用市场一直保持着快速发展，在国民经济中的地位不断提升。一
方面，个人的互联网应用市场不断发展，截至2010年末中国网民规模已达4.57亿；另一方
面，企业的互联网应用市场也逐渐步入成熟，继企业内部信息化之后，互联网成为企业发展
的又一强劲推力，互联网已经被广泛应用于企业的营销销售、客户服务、办事办公等方面。(The Chinese small and medium-sized enterprise Internet application status of the report were: In recent years, China s Internet application market has been maintained a rapid development of the national economy of stature. a , personal Internet application market development, at the end of 2010 the scale of China s netizens has reached 457 million The other party Surface, enterprise Internet application market also gradually into mature, the enterprise internal information after, the Internet becomes the development of the enterprise And a strong thrust, the Internet has been widely used in enterprise)
- 2011-12-23 11:10:53下载
- 积分：1
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Technical_overview_CitectSCADA
This is Technical overview CitectSCADA, it described the total technical details for the scada system.
- 2012-05-03 14:50:15下载
- 积分：1
