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Current and frequency

Xem 1-20 trên 53 kết quả Current and frequency
  • After four centuries a quote from Galileo Galilei is still the most effective way to introduce a Metrology book: “Measure what is measurable, and make measurable what is not so”. Every human activity needs an objective measurement and every global process should be supported by a common standard. There are several handbooks, tutorials and journals that focus on the basic concepts of metrology, the uncertainty theory and the international reference standards. Moreover, the engineering literature is awash with measurement methods for each specific field.

    pdf470p wqwqwqwqwq 09-07-2012 60 9   Download

  • Steady-state operation of a fusion power plant requires external current drive to minimize the power requirements, and a high fraction of bootstrap current is required. One of the external sources for current drive is lower hybrid current drive, which has been widely applied in many tokamaks. Here, using lower hybrid simulation code, we calculate electron distribution function, electron currents and phase velocity changes for two options of demonstration reactor at the launched lower hybrid wave frequency 5 GHz.

    pdf8p minhxaminhyeu5 30-06-2019 1 0   Download

  • Grammar: Chapter 5: The present continuous. Activities in progress: A. Use the present continuous for activities that are in progress (or happening) at the exact moment the speaker is talking. You can use time expressions such as now or right now to emphasize that an action is happening currently (and may end soon). For example: 1. Look! It is snowing. 2. She’s making dinner now. 3. Steve can’t come to the phone right now. He’s taking a bath.

    doc8p nguyencongvan91 24-10-2010 204 63   Download

  • History of the Present Illness: Duration of chest pain. Location, radiation (to arm, jaw, back), character (squeezing, sharp, dull), intensity, rate of onset (gradual or sudden); relationship of pain to activity (at rest, during sleep, during exercise); relief by nitroglycerine; increase in frequency or severity of baseline anginal pattern. Improvement or worsening of pain. Past episodes of chest pain. Age of onset of angina.

    pdf73p vantuong_x1 23-11-2009 114 31   Download

  • Multi-carrier modulation, in particular Orthogonal Frequency Division Multiplexing (OFDM), has been successfully applied to a wide variety of digital communications applications over the past several years. Although OFDM has been chosen as the physical layer standard for a diversity of important systems, the theory, algorithms, and implementation techniques remain subjects of current interest. This is clear from the high volume of papers appearing in technical journals and conferences.

    pdf221p taurus23 02-08-2012 55 18   Download

  • In a normal alternating current power system, the voltage varies sinusoidally at a specific frequency, usually 50 or 60 hertz. When a linear electrical load is connected to the system, it draws a sinusoidal current at the same frequency as the voltage (though usually not in phase with the voltage). When a non-linear load, such as a rectifier, is connected to the system, it draws a current that is not necessarily sinusoidal. The current waveform can become quite complex, depending on the type of load and its interaction with other components of the system.

    pdf190p kennybibo 14-07-2012 78 15   Download

  • Our intention in writing MRI: Basic Principles and Applications was to provide a book that would serve as a bridge between the theory and practical usage of magnetic resonance imaging (MRI). We minimized the use of intense mathematical formalism and attempted to show the underlying foundation for MRI as it is currently used. Our attempt was to provide a resource for those medical personnel who needed accurate and detailed information yet could not devote time to study an in-depth theoretical treatise....

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  • The information compiled in this report reflects evidence collected from WHP policies in high-income countries, primarily within the European and North American regions. The scarcity of information and case studies from low- and middle-income countries was highlighted as an important gap in the current knowledge that needs to be addressed. Despite the limits of the available evidence, all stakeholders are encouraged to develop and implement WHP policies and programmes tackling unhealthy diets and physical inactivity....

    pdf65p nhacchovina 22-03-2013 62 6   Download

  • Risk management has attracted increased attention in recent years. Many advisers have recently reevaluated, or are currently reevaluating, their organizational structures and other practices relating to risk management. In many cases, they are adopting more formal risk management practices. Fund boards also have been reevaluating their risk management oversight practices, including the structures and mandates of board committees and the format and frequency of board reports. Practices in the industry continue to evolve. ...

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  • We study weekly portfolio returns from 23 developed markets. We choose to study returns at a weekly frequency to avoid the problems caused by nonsyn- chronous trading around the world at higher frequencies. All returns are U.S. dollar denominated, and we calculate excess returns by subtracting the U.S. weekly T-bill rate, which is obtained from the Center for Research in Security Prices (CRSP) riskfree file. 1 Our selection of developed countries matches the countries currently in the Morgan Stanley Developed Country Index. Data for the United States are from Compustat and CRSP.

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  • Second, the model is consistent with multifactor volatility models or CGARCH e¤ects. Both endowment risk and sentiment risk are associated with instantaneous shocks associated with the idiosyncratic risk embedded in the Brownian motions present in the investors endowments. In contrast, solvency risk is associated with the binding of solvency constraints, and therefore it occurs at a lower frequency.

    pdf35p connhobinh 07-12-2012 59 2   Download

  • This paper presents some results of fabrication and experiment of an electrical generator for sea wave energy. The electrical generator device is fixed on the bottom of the sea and works in the vertical direction of sea waves. The experiment results show that, for the received voltage and current, the power of the electrical generator is up to 300 W and operates stably at about 200 W during experiment at sea. The output voltage is at 220 VAC frequency 50 Hz and is a pure sine wave.

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  • Currently the most widely used machine for precision seeding of cotton and maize seed is vacuum type. The capture of seeds by vacuum plate and the release of seeds from the vacuum plate should be performed precisely without missing or doubling.

    pdf12p vimb123 12-01-2019 17 0   Download

  • Manipulating light by subwavelength resonators via plasmonic metasurface is currently studied intensively for various novel THz and optical applications. In this report, we present the fabrication of a simple plasmonic metasurface operating at infrared frequencies using the UV lithography and electron beam evaporation techniques.

    pdf5p viengland2711 23-07-2019 0 0   Download

  • Just as you usually use a pound or so of apples to bake your average pie or several tons of steel to build a suburban office park, in electronics, some things just naturally come in small measurements and others in large measurements. That means that you typically see certain combinations of prefixes and units over and over.

    pdf10p balanghuyen 13-01-2010 136 16   Download

  • This chapter discusses sinusoidal steady state power calculations. Numerical integration is used to obtain the rms value, average power and quadrature power. Three-phase circuits are analyzed by converting the circuits into the frequency domain and by using the Kirchoff voltage and current laws. The unknown voltages and currents are solved using matrix techniques. Given a network function or transfer function, MATLAB has functions that can be used to (i) obtain the poles and zeros, (ii) perform partial fraction expansion, and (iii) evaluate the transfer function at specific frequencies.

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  • Reoffering yield In a purchase and sale, the yield to maturity at which the underwriter offers to sell the bonds to investors. Reopen an issue The Treasury, when it wants to sell additional securities, will occasionally sell more of an existing issue (reopen it) rather than offer a new issue. Reorganization Creating a plan to restructure a debtor's business and restore its financial health. Replacement cost Cost to replace a firm's assets. Replacement cycle The frequency with which an asset is replaced by an equivalent asset. Replacement value Current cost of replacing the firm's assets.

    pdf10p hanhphuc51 20-12-2010 54 11   Download

  • Otosclerosis is one of the most fascinating diseases in the field of otology. Its familial or spontaneous occurrence, its histological appearance, its clinically sex-dependent frequency with female predominance, its still mysterious etiology and the intellectual challenges it poses as well as the aesthetics involved in its surgical treatment make otosclerosis a subject for continuous clinical research.

    pdf390p crazy_sms 08-05-2012 54 10   Download

  • C Algorithms for Real-Time DSP, by Paul Embree, is a stimulating book. When I finished reading it, I went straight to my workstation and started experimenting with DSP algorithms. Embree clearly knows this subject and presents it in a straightforward manner. This is a refreshing change from the academic approach taken by the seven digital-signal processing books currently on my bookshelf. Not that Embree doesn't reference some heavy math. C Algorithms for Real-Time DSP is not for the mathematically weak of heart.

    pdf126p transang5 23-10-2012 47 9   Download

  • Ducvietjsc.com.vn Advanced General-purpose Inverters SYSDRIVE RX Series Digital Operator Used to set parameters, perform various monitoring, and start and stop the Inverter. Nomenclature and Functions ■ Inverter Nomenclature and Functions Data Display Displays relevant data, such as frequency reference, output current, and set values. Terminal block Cover Remove this cover when wiring the terminal block.

    pdf16p liemthanh 15-12-2009 157 8   Download

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