Xem 1-20 trên 448 kết quả Time power
  • “Success is focusing the full power of all you are on what you have a burning desire to achieve.” (Wilferd A. Peterson) Thank you for reading this book. I know how busy you are, and even reading a book on Time Management is

    pdf370p tienwru 26-09-2010 144 88   Download

  • Time PowerTIME POWER. “Success is focusing the full power of all you are on what you have a burning desire to achieve.” (Wilferd A. Peterson) Thank you for reading this book. I know how busy you are, and even reading a book on Time Management is Success is focusing.

    pdf370p transang4 04-10-2012 44 18   Download

  • PSAT is a Matlab toolbox for static and dynamic analysis and control of electric power systems. The PSAT project began in September 2001, while I was a Ph.D. candidate at the Universit´ degli Studi di Genova, Italy. The first public a version date back to November 2002, when I was a Visiting Scholar at the University of Waterloo, Canada. I am currently maintaining PSAT in the spare time, while I am working as associate professor at the Universidad de Castilla-La Mancha, Ciudad Real, Spain. PSAT is provided free of charge, in the hope it can be useful and other people...

    pdf105p hoanganhbkpro 13-10-2010 202 61   Download

  • Harmonic distortion problems include equipment overheating, motor failures, capacitor failure and inaccurate power metering. The topic of power system harmonics was covered for the first time 20 years ago and the first edition has become a standard reference work in this area. Unprecedented developments in power electronic devices and their integration at all levels in the power system require a new look at the causes and effects of these problems, and the state of hardware and software available for harmonic assessment.

    pdf190p chipmoon 19-07-2012 76 38   Download

  • Engineering for sustainability is an emerging theme for the twenty-first century, and the need for more environmentally benign electric power systems is a critical part of this new thrust. Renewable energy systems that take advantage of energy sources that won’t diminish over time and are independent of fluctuations in price and availability are playing an ever-increasing role in modern power systems.

    pdf676p nlqkhanh29 19-11-2012 98 36   Download

  • This book is mainly intended for designers and users of magnetic components in power electronics. It can also be used for didactical purposes. Magnetic components such as inductors and transformers constitute together with the control and the semiconductor components, the main parts in the design of power electronic converters. Some experience teaches that the design of the magnetic parts is still often done by trial and error. This can be explained by a (too) long working-in time for designing inductors and transformers.

    pdf456p nguyenthai_thinh 16-03-2013 75 34   Download

  • The international technology concern SCHOTT decided back in the 1990's to focus on solar energy. Today SCHOTT is the only company worldwide that offers products and solutions for all solar technologies. SCHOTT delivers solar thermal tube collectors for water heating, photovoltaic modules for decentralized power generation, and receivers for parabolic trough power plants for centralized generation of electricity. SCHOTT employs outstanding solar experts. They are convinced of the great future prospects for solar energy.

    pdf40p lulanphuong 22-03-2012 76 29   Download

  • Solar electric plants shall be understood to be photovoltaic energy converters that are able to self-sufficiently satisfy a mean energy demand over a significant period of time, be it an appliance that is permanently hooked up or just for sporadic power supply of appliances. Such plants have in common that their input and output quantities fluctuate widely. They can therefore only be dimensioned on the basis of a mean value and are not able to satisfy this demand without the possibility to store energy. ...

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  • I have been undertaking the research and practical applications of power system optimization since the early 1980s. In the early stage of my career, I worked in universities such as Chongqing University (China), Brunel University (UK), National University of Singapore, and Howard University (USA). Since 2000 I have been working for AREVA T & D Inc (USA). When I was a full - time professor at Chongqing University, I wrote a tutorial on power system optimal operation, which I used to teach my senior undergraduate students and postgraduate students in power engineering until 1996.

    pdf623p nguyenthai_thinh 16-03-2013 51 22   Download

  • This book covers the recent development and progress of the wind energy conversion system. The chapters are contributed by prominent researchers in the field of wind energy and cover grid integration issues, modern control theories applied in wind energy conversion system, and dynamic and transient stability studies.

    pdf212p haiduong_1 15-04-2013 168 22   Download

  • Today’s wind energy industry is at a crossroads. Global economic instability has threatened or eliminated many financial incentives that have been important to the development of specific markets. Such economic sponsorship of energy generation is not unique to renewables; fossil based sources are also subsidized in many different countries. However, for a technology like wind energy whose markets are still developing, incentives can be critical for industry growth.

    pdf374p namde01 11-04-2013 43 19   Download

  • (BQ) Ebook The power of less will show you how to break down any goal into manageable tasks; Focus on only a few tasks at a time; create new and productive habits; hone your focus; increase your efficiency. It demonstrates how to streamline your life by identifying the essential and eliminating the unnecessary-freeing you from everyday clutter and allowing you to focus on accomplishing the goals that can change your life for the better.

    pdf187p ngoctamtam 25-05-2015 55 13   Download

  • There is an upward trend that human activities involve more electric power nowadays and for years to come. And we will soon be facing shortage of electricity supply if we rely solely on non-renewable power generation from fossil fuels such as coals. Renewable energy generation has proven effective in meeting the demand.

    pdf157p namde01 10-04-2013 53 10   Download

  • Today the most important electrochemical storage systems for stationary applications are the lead-acid and the nickel/cadmium systems. Both of them have advantages and disadvantages which carefully have to be considered for best selection. Batteries for telecom applications are specially designed for long service life and hours of discharging time. Batteries for UPS applications are designed for discharges with high current over short times (minutes). Special battery constructions are offered for the different requirements. ...

    pdf27p congdat261 08-11-2010 45 9   Download

  • For simple applications, switching devices such as contactors or solid-state relays can be used to control electrical power. The electrical power in a process can be regulated by varying the ON and OFF times of these devices. But in many processes this provision of energy in large blocks will cause significant variations in the process output. As an example, it would not be possible to control lighting levels simply by using such two-state on/off switching elements. Neither could good temperature controllers be implemented in this way...

    pdf44p beobobeo 01-08-2012 35 8   Download

  • Okay, now that you know the basics of the mechanics of sleep. Let’s talk about how you can use this new knowledge to sleep less, have more powerful sleep, and have more energy in your life. I have given you the previous “scientific” information here because I wanted you to have a knowledge base with the “right” information.

    pdf69p thuytienvang_1 31-10-2012 26 8   Download

  • This thesis presents time-resolved measurements of the spin evolution of transient carrier populations in III-V quantum wells. Non-equilibrium distributions of spin polarisation were photoexcited and probed with picosecond laser pulses in three samples; a high mobility modulation n-doped sample containing a single GaAs/AlGaAs quantum well, an In0.11Ga0.89As/GaAs sample containing three quantum wells and, a multi-period GaAs/AlGaAs narrow quantum well sample.

    pdf157p tieulaubau 21-06-2011 48 6   Download

  • Filled with ready-to-use JavaScript solutions for creating dynamic web content, this practical guide is will save you hundreds of hours of programming time! Plug-in JavaScript delivers 100 JavaScript power solutions in one handy guide. You can use them right away to supercharge your JavaScript applications.Each chapter offers complete, working examples for specific end results, In this time-saving tool, all of the code is extensively documented along with tips for adapting it for your own requirements.

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  • The course of constitution-making within Europe has never run less smoothly. At the time of writing, French and Dutch electorates have inflicted a brutal blow upon the aspirations of European sentimentalists everywhere, rejecting the adoption of the draft constitutional treaty for Europe.

    pdf257p japet75 25-02-2013 19 3   Download

  • In practice, consumption devices are not only resistive but also reactive and this reactance varies with time. Therefore, grid voltage is not stable and coefficients always change in spite of using Automatic Reactive Power Regulator. To regulate voltage and cosφ in an expected range, it is necessary to change the parameters of regulators as the loads change.

    pdf6p tuanlocmuido 19-12-2012 17 2   Download

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