Relevant bibliographies by topics / Generators

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Generators'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 March 2023

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Journal articles on the topic "Generators"

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Mato Mišković, Marija Mirošević, and Mateo Milković. "ANALYSIS OF SYNCHRONOUS GENERATOR ANGULAR STABILITY DEPENDING ON THE CHOICE OF THE EXCITATION SYSTEM." Journal of Energy - Energija 58, no. 4 (September 16, 2022): 430–45. http://dx.doi.org/10.37798/2009584308.

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The paper elaborates on the mathematical model of the electric power system with several synchronous generators and in this model the generators are presented by a non-linear mathematical model. By applying such a model, the impact of the manner of supplying the excitation system on the generator’s angular stability was researched in the circumstances of occurrence of a short circuit in the network. The established model enables the analysis of the generator’s stability in the circumstances of extensive disruptions in the electric power system for the case of the generator with separate excitation and the generator with self-excitation. Research results can be useful when making the decision on the choice of the generator excitation type, when renewing the existing and building new generators.
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Pavlović, Jelena, Bojan Radojičić, Lazar Stančić, Jasna Dragosavac, Sava Dobričić, and Žarko Janda. "Algorithm of reactive power dispatching "per generator" realization on TPP Nikola Tesla A." Zbornik radova Elektrotehnicki institut Nikola Tesla, no. 32 (2022): 113–23. http://dx.doi.org/10.5937/zeint32-41760.

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The algorithm of reactive power dispatching "per generator" realization is presented in the paper. Dispatching "per generator" and "per grid" are two modes of reactive power dispatching used by coordinated reactive power and voltage regulator (GRRS). Reactive power dispatching "per generator" ensures equal heating of the generators, while dispatching "per grid" ensures maximal reactive power reserve when generated reactive power either increases, or decreases. Reactive power dispatching "per generator" is more complex for realization because the dispatching criterion may have wider generator's reactive power operation area than the working capability curve. In these cases, the additional limiting of the generator reactive power is necessary, while other generators take over the remaining reactive power, still considering the reactive power dispatching criteria "per generator" and the limits of the remaining generators. Both reactive power dispatching modes are presented in two examples, while operating near and far from the limit area. Eventually, as the verification of the algorithm and its realization, the operating results of GRRS while dispatching "per generator" is active, are presented.
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Labuschagne, Casper J. J., and Maarten J. Kamper. "On the Design and Topology Selection of Permanent Magnet Synchronous Generators for Natural Impedance Matching in Small-Scale Uncontrolled Passive Wind Generator Systems." Energies 15, no. 5 (March 4, 2022): 1888. http://dx.doi.org/10.3390/en15051888.

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Small-scale uncontrolled passive wind generator systems are an attractive solution for rural energy generation because of the system’s reliability and low cost. However, designing these uncontrolled wind generators for good power matching with the wind turbine is challenging and often requires external impedance matching. In this paper, permanent magnet generators with different stator and rotor structures were investigated and designed to increase the generator’s synchronous inductance for a natural impedance matching. For the design methodology, multi-objective optimisation was used to design the generators for near-maximum turbine power matching, whereby internal impedance matching was reached as much as possible. It was shown that altering the placement and orientation of the permanent magnets in the rotor is a viable method to achieve the desired impedance matching; however, these generators do not have the best performance. It was found that the surface-mounted permanent magnet generator with semi-closed slots was the optimum topology. An optimised generator prototype was tested for the experimental validation. All designs were verified by comparing the results of 2D and 3D finite-element analysis.
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Maksymovych, Volodymyr, Mariia Shabatura, Oleh Harasymchuk, Ruslan Shevchuk, Pawel Sawicki, and Tomasz Zajac. "Combined Pseudo-Random Sequence Generator for Cybersecurity." Sensors 22, no. 24 (December 11, 2022): 9700. http://dx.doi.org/10.3390/s22249700.

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Random and pseudo-random number and bit sequence generators with a uniform distribution law are the most widespread and in demand in the market of pseudo-random generators. Depending on the specific field of application, the requirements for their implementation and the quality of the generator’s output sequence change. In this article, we have optimized the structures of the classical additive Fibonacci generator and the modified additive Fibonacci generator when they work together. The ranges of initial settings of structural elements (seed) of these generators have been determined, which guarantee acceptable statistical characteristics of the output pseudo-random sequence, significantly expanding the scope of their possible application, including cybersecurity. When studying the statistical characteristics of the modified additive Fibonacci generator, it was found that they significantly depend on the signal from the output of the logic circuit entering the structure. It is proved that acceptable statistical characteristics of the modified additive Fibonacci generator, and the combined generator realized on its basis, are provided at odd values of the module of the recurrent equation describing the work of such generator. The output signal of the combined generator has acceptable characteristics for a wide range of values of the initial settings for the modified additive Fibonacci generator and the classic additive Fibonacci generator. Regarding the use of information security, it is worth noting the fact that for modern encryption and security programs, generators of random numbers and bit sequences and approaches to their construction are crucial and critical.
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Yosua Alvin Adi Soetrisno, Bambang Winardi, and Enda Wista Sinuraya. "Generator protection system with reverse power relay on 1000 KVA 'Cummins' diesel generator at Cepu Human Resources Development Center." World Journal of Advanced Research and Reviews 14, no. 1 (April 30, 2022): 377–84. http://dx.doi.org/10.30574/wjarr.2022.14.1.0343.

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Each generator is designed to create a certain amount of electricity. However, there are situations when the generator cannot handle the current load. The solution is to employ two or more generators to produce as much power as the number of generators operating simultaneously or synchronizing (parallel generator). Several parameters must be configured throughout the synchronization process, including the phase sequence, voltage, frequency, and phase angle, which must be the same. An operation failure can occur if one of the prerequisites is not fulfilled, resulting in reverse power. The motoring condition is a condition that occurs when the primary mover of a parallel generator fails. A reverse power protection mechanism is required to prevent this motoring. When one of the generator's prime movers fails or the operation fails, the voltage and load will drop. The other generator then feeds another generator. The reverse power relay instructs the generator's main circuit breaker to open the circuit so that no additional equipment is harmed. This research aims to investigate and comprehend the reverse power relay protection system's use.
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Yosua Alvin Adi Soetrisno, Bambang Winardi, and Enda Wista Sinuraya. "Generator protection system with reverse power relay on 1000 KVA 'Cummins' diesel generator at Cepu Human Resources Development Center." World Journal of Advanced Research and Reviews 14, no. 1 (April 30, 2022): 377–84. http://dx.doi.org/10.30574/wjarr.2022.14.1.0343.

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Each generator is designed to create a certain amount of electricity. However, there are situations when the generator cannot handle the current load. The solution is to employ two or more generators to produce as much power as the number of generators operating simultaneously or synchronizing (parallel generator). Several parameters must be configured throughout the synchronization process, including the phase sequence, voltage, frequency, and phase angle, which must be the same. An operation failure can occur if one of the prerequisites is not fulfilled, resulting in reverse power. The motoring condition is a condition that occurs when the primary mover of a parallel generator fails. A reverse power protection mechanism is required to prevent this motoring. When one of the generator's prime movers fails or the operation fails, the voltage and load will drop. The other generator then feeds another generator. The reverse power relay instructs the generator's main circuit breaker to open the circuit so that no additional equipment is harmed. This research aims to investigate and comprehend the reverse power relay protection system's use.
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Magaji, Nuraddeen, and Bashir Umar. "Application of Power System Stabilizer on Stability Studies." Applied Mechanics and Materials 793 (September 2015): 149–53. http://dx.doi.org/10.4028/www.scientific.net/amm.793.149.

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This paper discusses the effect of placing a power system stabilizer (PSS) at various generators for stability studies in a large power system. The damping control for the New-England 39-bus system was discussed. The effect of PSS in damping the electromechanical modes on different generator was studied. The PSS takes only a generator’s speed as input, and feeds it, after modification, to the voltage reference input of the generator’s excitation system. The results by placing a power system stabilizer on eight generators of the 39-bus system were found to be stable satisfactorily damped
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Iavich, Maksim, Tamari Kuchukhidze, Giorgi Iashvili, and Sergiy Gnatyuk. "Hybrid quantum random number generator for cryptographic algorithms." RADIOELECTRONIC AND COMPUTER SYSTEMS, no. 4 (November 29, 2021): 103–18. http://dx.doi.org/10.32620/reks.2021.4.09.

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The subject matter of the article is pseudo-random number generators. Random numbers play the important role in cryptography. Using not secure pseudo-random number generators is a very common weakness. It is also a fundamental resource in science and engineering. There are algorithmically generated numbers that are similar to random distributions but are not random, called pseudo-random number generators. In many cases the tasks to be solved are based on the unpredictability of random numbers, which cannot be guaranteed in the case of pseudo-random number generators, true randomness is required. In such situations, we use real random number generators whose source of randomness is unpredictable random events. Quantum Random Number Generators (QRNGs) generate real random numbers based on the inherent randomness of quantum measurements. The goal is to develop a mathematical model of the generator, which generates fast random numbers at a lower cost. At the same time, a high level of randomness is essential. Through quantum mechanics, we can obtain true numbers using the unpredictable behavior of a photon, which is the basis of many modern cryptographic protocols. It is essential to trust cryptographic random number generators to generate only true random numbers. This is why certification methods are needed which will check both the operation of the device and the quality of the random bits generated. The goal of the research is also to develop the model of a hybrid semi self-testing certification method for quantum random number generators (QRNG). The tasks to be solved are to create the mathematical model of a random number generator, which generates the fast random numbers at a lower cost. To create the mathematical model of a hybrid semi self-testing certification method for quantum random number generators. To integrate a hybrid semi self-testing certification method to the hybrid random number generator. the methods used are mathematical optimization and simulation. The following results were obtained: we present the improved hybrid quantum random number generator, which is based on QRNG, which uses the time of arrival of photons. The model of a hybrid semi self-testing certification method for quantum random number generators (QRNG) is offered in the paper. This method combines different types of certification approaches and is rather secure and efficient. Finally, the hybrid certification method is integrated into the model of the new quantum random number generator. Conclusions. The scientific novelty of the results obtained is as follows: 1. The hybrid quantum random number generator is offered, which is based on QRNG, which uses the time of the arrival of photons. It uses the simple version of the detectors with few requirements. The hybrid QRNG produces more than one random bit per the detection of each photon. It is rather efficient and has a high level of randomness. 2. The hybrid semi self-testing certification method for quantum random number generators (QRNG) is offered. The Self-testing, as well as device-independent quantum random number generation methods, are analyzed. The advantages and disadvantages of both methods are identified. Based on the result the hybrid method is offered. 3. The hybrid semi self-testing certification method for quantum random number generators is integrated into the offered model of the quantum random number generator. The paper analyzes its security and efficiency. The paper offers to use the new random number generator in the crypto-schemes.
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Shaker, Noor, and Mohamed Abou-Zleikha. "Alone We Can Do So Little, Together We Can Do So Much: A Combinatorial Approach for Generating Game Content." Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment 10, no. 1 (June 29, 2021): 167–73. http://dx.doi.org/10.1609/aiide.v10i1.12729.

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In this paper we present a procedural content generator using Non-negative Matrix Factorisation (NMF). We use representative levels from five dissimilar content generators to train NMF models that learn patterns about the various components of the game. The constructed models are then used to automatically generate content that resembles the training data as well as to generate novel content through exploring new combinations of patterns. We describe the methodology followed and we show that the generator proposed has a more powerful capability than each of generator taken individually. The generator's output is compared to the other generators using a number of expressivity metrics. The results show that the proposed generator is able to resemble each individual generator as well as demonstrating ability to cover a wider and more novel content space.
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Tomczyk, Krzysztof. "Influence of Monte Carlo generations applied for modelling of measuring instruments on maximum distance error." Transactions of the Institute of Measurement and Control 41, no. 1 (February 26, 2018): 74–84. http://dx.doi.org/10.1177/0142331217753062.

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The paper presents a study of the influence of Monte Carlo (MC) generations, applied for modelling measuring instruments, on the maximum distance error. This modelling refers to the frequency domain and is based on the weighted least-squares (WLS) method. The MC generations were produced by the four pseudo-random number generators that are directly related to a Gaussian distribution. These generators are: Basic Box-Muller, Polar Box-Muller, Monty Python and Ratio of Uniforms. Thus, the main task of this paper is an assessment of the influence of the MC generations provided by these generators on the values of error. The effect of generator selection on the model parameters and associated uncertainties was also considered. The numerical calculations were carried out for the accelerometer PCB393B05 that was chosen as being examples of measuring instruments intended for the measurement of acceleration.
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Dissertations / Theses on the topic "Generators"

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Kanso, Ali A. "Clock-controlled generators." Thesis, Royal Holloway, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325033.

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Stephen, Karen M. A. "Organic gas generators." Thesis, University of Aberdeen, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277395.

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Three heterocyclic systems were prepared along with derivatives. The thermal decompositions of these heterocycles was examined and their suitability as gas generators assessed, with respect to, melting point, decomposition temperature, volume and type of gases evolved, ease of hydrolysis, and ease of preparation. The preparation of 2-azido-5-phenyl-1,3,4-oxadiazole by a variety of routes is described. It was stable above its melting point and at higher temperatures decomposition was violent, evolving nitrogen, along with the formation of benzoyl cyanide. 1,2,4-Oxadiazolidine-3,5-dione melted at 103-105oC and decomposed at ca 155oC with gas evolution. 2,2'-Adipoyldi-1,2,4-oxadiazolidine-3,5-dione and the corresponding succinyl derivatives were prepared in good yield and decomposed on melting. The oxalyl and malonyl derivatives were more difficult to prepare due to their ease of hydrolysis. The oxalyl derivative decomposed ca 20o above its melting point. Parabanic acid (2,4,5-triketoimidazolidine) was easily prepared in high yield and decomposed on melting. N,N'-Diacetyl- and N,N'-dibenzoyl-parabanic acids were prepared, via the disodium salt of parabanic acid, and decomposed on melting. Monoacetyl parabanic acid decomposed 20-30o above its melting point. Hydrolysis of the acetyl derivatives was studied by 1H nmr spectroscopy. In the presence of adventitious water in the solvent diacetylparabanic acid gives, initially, the monoacetyl derivative and acetic acid, followed by ring opening to N-acetyloxaluric acid. This ease of hydrolysis reduces its attractiveness as a potential gas generator. An X-ray crystallographic determination was carried out on diacetylparabanic acid and the significance of the bond lengths in the hydrolysis process is discussed. N,N'-Adipoyldi-parabanic acid was prepared in low yield and decomposed ca 20o above its melting point.
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Hui, Joseph S. M. Massachusetts Institute of Technology. "Distributed correlation generators." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/122871.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 39-40).
We study the problem of distributed correlation generators wherein n parties wish to simulate unbounded samples from a joint distribution D = Di x D2 X ... x D[subscript n], once they are initialized using randomness sampled from a (possibly different) correlated distribution. We wish to ensure that these samples are computationally indistinguishable from i.i.d. samples from D. Furthermore, we wish to ensure security even against an adversary who corrupts a subset of the parties and obtains their internal (initialization) state. Our contributions are three-fold. First, we define the notion of distributed (noninteractive) correlation generators and show its connection to other cryptographic primitives. Secondly, assuming the existence of indistinguishability obfuscators, we show a construction of distributed correlation generators for a large and natural class of joint distributions that we call conditionally sampleable distributions. Finally, we show a construction for the subclass of additive-spooky distributions assuming private constrained pseudorandom functions (private CPRFs).
by Joseph Hui.
S.M.
S.M. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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Rodrigues, De Oliveira Zanini Plinio. "Smart dielectric elastomer generators." Thesis, University of Bristol, 2018. http://hdl.handle.net/1983/6b5105e4-d303-4633-a8e6-28fff9a7b753.

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Dielectric Elastomer Generators (DEGs) are an emerging technology able to answer the need for cheap and available energy solutions, from energy scavenging at small scale to energy generation in large devices. Consisting of rubbery stretchable capacitors, DEG scan convert mechanical energy into electrical energy when their charges are displaced against the electric field during their relaxing phase. Despite having characteristics such as high energy density, low cost, and easy scalability, there are still significant challenges in their implementation. This includes the need for high voltage priming to enable the energy conversion and the adequate timing to charge/discharge the DEG. This thesis seeks to investigate and propose solutions for smart charge management in DEGs at different scales. Starting from a model-based analysis of the energy conversion phenomenon during the charging and discharging transients, we describe how undesired electrical-to-mechanical energy conversion, exhibited as an actuator-like effect, can reduce the overall energy generated during a cycle. Subsequently, we analyse different layouts of Self-Priming Circuits (SPCs), a scheme to passively promote the charge and discharge of DEGs. SPC-DEG systems can receive low voltage priming and then increase the system voltage and the amount of energy generated per cycle, eliminating the need for a high voltage time-controlled charge. Our model is experimentally validated and gives good quantitative accuracy. Using the SPC-DEG model and considering the actuator-like behaviour, we predict that the SPC-DEG systems can undergo a self-stabilising condition, which we then verify experimentally, and propose methods to estimate the emergent steady state. In addition, we develop the Self-sensing Peak Detection (SSPD) method that self-senses the deformation characteristic of DEGs and uses it as a signal to autonomously promote charge and discharge. The method was successfully implemented experimentally and has potential to optimally control DEG cycles even for unpredictable frequency and amplitude deformations. This thesis demonstrates possible solutions for charge management of DEGs and their implementation in the future.
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Yii, See Mee. "Microgrid with distributed generators." Thesis, Yii, See Mee (2009) Microgrid with distributed generators. Other thesis, Murdoch University, 2009. https://researchrepository.murdoch.edu.au/id/eprint/3250/.

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The principal aim of this project is to study the energy production by solar energy system in close to the consumers and integrated into a microgrid. Microgrids are small-scale versions of today’s huge centralized electricity system, where it can generate, distribute and regulate the flow of electricity to consumers. Microgrids are able to feature the latest smart technology that increases efficiency and reliability and to create islands of sustainable energy within the larger grid. The main benefits of microgrids are: •Microgrids increase power supply reliability. •Microgrids make it easier to efficiently meet growing consumer demand. •Microgrids make it possible to deploy clean, renewable energy. The report gives an overview of the generator technologies, and discusses the characteristics of a microgrid and the barriers that have to be overcome if microgrids are to be deployed in Australia. A focus of the study is a microgrid of domestic users (housing estate) powered by photovoltaics (PV). In addition, this project will propose a method to evaluate the reliability of customers contracted with microgrid including distributed generators (DG) and power storage devices. A model of the energy consumption is used to produce typical profiles for the electricity consumption. Focusing on the balance between generation and load, a methodology has been developed to determine the optimum combination of generators and energy storage in the microgrid. It is found that a microgrid consisting of around 3kW (max peak) per household and 50% reduction of the electricity consumption will maintain energy balance on a yearly basis if supplemented by energy storage. The principle conclusion is that microgrids do have real potential to make a major contribution to reducing Green house Gas Emissions from building.
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Ranlöf, Martin. "Electromagnetic Analysis of Hydroelectric Generators." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-146629.

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Hydropower maintains its position as the most important source of renewable electric energy in the world. The efficiency of large hydropower plants is unsurpassed, and after more than hundred years of development, the technology is mature and highly reliable. While new hydro resources are currently being developed in Asia and South America, most European countries go through a phase of intense refurbishment and upgrading of existing plants. Challenges faced by the hydropower industry include a knowledge transfer to new generations and the adaptation of unit designs to meet new operational requirements. As with all branches of engineering, the use of computerized design tools has revolutionized the art of hydropower plant design and the analysis of its performance. In the present work, modern tools like coupled field-circuit models and semi-analytic permeance models are used to address different aspects of electromagnetic analysis of generators in large hydropower plants. The results include the presentation of a mathematical model that uses concepts from rotating field theory to determine the air-gap flux density waveform in a hydroelectric generator. The model was succesfully used to evaluate armature voltage harmonics and damper bar currents at no-load and load conditions. A second study is concerned with the importance of losses due to rotational fields in core loss calculations. It is found that dynamic and rotational effects typically increase the total core loss estimates with about 28% in large hydroelectric generators. In a third study, linear models for the calculation of salient pole shoe form factors at an arbitrary level of magnetic loading are presented. The effect of the damper winding configuration on the damping capability of salient-pole generators is then evaluated in a separate study. The predicted impact of the coupling between damper cages on adjacent poles on the damping torque production is verified in a set of experiments.
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McEwan, William Thomas. "Periodic actuation of vortex generators." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485005.

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The basis of this research is the augmentation of turbulent boundary layer stability. Here stability is referred to as ,the boundary layer's ability to withstand adverse pressure gradient and therefore separation. A practical example of an' issue involving a requirement for greater stability, where separation is a typical and detrimental feature, would be a deployed flap during a critical regime of the flight envelope such as landing. A sub-boundary layer vortex generator (SBVG) is a static flow control device which does not carry the drag penalty of its traditional larger counterparts. It is however less effective. An excited SBVG may be more effective than a static model, in terms of enhancement of stability, with the added benefit of not requiring sophisticated feedback systems to prevent the device from generating detrimental effects during periods other than the flight regime for which it is intended to operate, since the SBVG is embedded within the boundary layer. Here an SBVG was oscillated (or swept) between three inclination ranges at a number of frequencies. The swept inclination ranges were 16° to 24°, 20° to 28° and 24° to 32°. These motions were executed at reduced frequencies of 0.1,0.6, 1.6,3.1,4.7, and 6.3. The data show that dynamic actuation of a sub-boundary layer vortex generator results in a weaker vortex with accelerated decay than is generated by a static vortex generator at equivalent incidence. The strength and persistence of the dynamically generated vortex is closely linked with the reduced frequency, in that increase in frequency results in an increasingly weak vortex with an increasing rate of decay.
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AMINO, ROBERT, and JONI BAITAR. "Probabilistic Pseudo-random Number Generators." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-157351.

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Random numbers are essential in many computer applications and games. The goal of this report is to examine two of the most commonly used random number generators and try to determine some of their strengths and weaknesses. These generators are the Linear Congruential Generator(LCG) and the Mersenne Twister(MT). The main objective will be to determine which one of these is the most optimal for low intensive usage and everyday work. Although some of the test results were in conclusive,there were some indications that MT is the better Pseudorandom Number Generator (PRNG) and therefore the preferred PRNG. However, be wary that this is not a general guideline and some implementations may differ from this.The final verdict was thus that MT is a more favourable option(mainly due to its speed) for everyday work, bothon a practical and theoretical level, if a choice should arise between the two options.
Slumptal representerar en viktig komponent i många datorspel, simulationer och övriga progam. Två av de mest förekommande slumptalsgeneratorerna är Linjär kongruensgeneratorn (LKG) samt Mersenne Twister(MT). Huvudfrågan som skall besvaras i denna rapport är huruvida, för vardagligt bruk, den ena generatorn är att föredra framför den andra. Ett antal tester kommer att utföras för att försöka finna eventuella styrkor samt svagheter med respektive generator.Baserat på ett fåtal tester är MT att föredra framför LKG. Detta stämmer väl överens med teorin. Notera dock att detta inte alltid gäller och att det kan förekomma skiljaktigheter mellan de båda alternativen som strider mot det tidigare påståendet. Detta är främst beroende på vilka implementationer som används för respektive generator. Slutsatsen är således att användning av MT ändå rekommenderasframför LKG, främst på grund av den snabba genereringshastigheten för MT.
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Agerblad, Josefin, and Martin Andersen. "Provably Secure Pseudo-Random Generators." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134830.

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This report is a literary study on provably secure pseudo-random generators. In the report we explain what provably secure pseudo-random generators are and what they are most commonly used for. We also discuss one-way functions which are closely related to our subject. Furthermore, two well-known generators are described and compared, one generator by Blum and Micali, and one by Blum, Blum and Shub. What we have concluded is that the x 2 mod N generator by Blum, Blum and Shub seems to be the better one concerning speed, security and application areas. You will also be able to read about how the Blum-Blum-Shub generator can be implemented and why we believe that implementation is suitable.
Den här rapporten är en litteraturstudie om bevisbart säkra pseudo-slumpmässiga generatorer. I rapporten förklarar vi vad bevisbart säkra pseudo-slumpmässiga generatorer är och vad de vanligtvis används till. Vi tar dessutom upp envägsfunktioner som är starkt kopplat till vårt ämne. Vidare beskrivs och jämförs två kända sådana generatorer, en generator av Blum och Micali och en generator av Blum, Blum och Shub. Den slutsats som vi kommit fram till är att x 2 mod N generatorn av Blum, Blum och Shub verkar vara den bättre utav dem vad gäller hastighet, säkerhet och applikationsområden. Ni kommer även kunna läsa om hur en sådan generator kan implementeras och vi förklarar varför den presenterade koden är bra.
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Hörmann, Wolfgang, and Gerhard Derflinger. "Universal Generators for Correlation Induction." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 1994. http://epub.wu.ac.at/524/1/document.pdf.

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Compared with algorithms specialized for a single distribution universal (also called automatic or black-box) algorithms for continuous distributions were relatively seldom discussed. But they have important advantages for the user: One algorithm coded and tested only once can do the same or even more than a whole library of standard routines. It is only necessary to have a program available that can evaluate the density of the distribution up to a multiplicative factor. In this paper we show that transformed density rejection is well suited to construct universal algorithms suitable for correlation induction which is important for variance reduction in simulation. (author's abstract)
Series: Preprint Series / Department of Applied Statistics and Data Processing
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Books on the topic "Generators"

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Altgilbers, Larry L., Igor Grishnaev, Ivor R. Smith, Yuriy Tkach, Mark D. J. Brown, Bucur M. Novac, and Iaroslav Tkach. Magnetocumulative Generators. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1232-4.

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Tofte, Mads. Compiler Generators. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-61504-7.

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Synchronous generators. Boca Raton, FL: Taylor & Francis, 2005.

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L, Altgilbers Larry, ed. Magnetocumulative generators. New York: Springer, 2000.

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Altgilbers, Larry L. Magnetocumulative Generators. New York, NY: Springer New York, 2000.

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Kerszenbaum, Isidor, and Geoff Klempner. Large Turbo-Generators. Boca Raton : Taylor & Francis Group, CRC Press, [2016] |: CRC Press, 2016. http://dx.doi.org/10.1201/9781315371542.

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Rybin, Yuriy K. Measuring Signal Generators. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02833-0.

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Vail, Grace. Motors and generators. New York: Gareth Stevens Pub., 2013.

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Association, National Electrical Manufacturers. Motors and generators. Rosslyn, Va: National Electrical Manufacturers Association, 2003.

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Lafferty, Peter. Magnets to generators. New York: Gloucester Press, 1989.

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Book chapters on the topic "Generators"

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Birkedal, Lars, and Morten Welinder. "Hand-writing program generator generators." In Programming Language Implementation and Logic Programming, 198–214. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-58402-1_15.

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Itô, Kiyosi, and Henry P. McKean. "Generators." In Diffusion Processes and their Sample Paths, 105–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-62025-6_5.

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Pitt, Christopher. "Generators." In The Definitive Guide to AdonisJs, 71–79. Berkeley, CA: Apress, 2018. http://dx.doi.org/10.1007/978-1-4842-3390-0_6.

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L'Ecuyer, Pierre. "generators." In Encyclopedia of Operations Research and Management Science, 695–702. New York, NY: Springer US, 2001. http://dx.doi.org/10.1007/1-4020-0611-x_852.

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Altgilbers, Larry L., Igor Grishnaev, Ivor R. Smith, Yuriy Tkach, Mark D. J. Brown, Bucur M. Novac, and Iaroslav Tkach. "Magnetocumulative Generators." In Magnetocumulative Generators, 57–123. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1232-4_3.

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Gennaro, Davide Di. "Code Generators." In Advanced Metaprogramming in Classic C++, 327–71. Berkeley, CA: Apress, 2015. http://dx.doi.org/10.1007/978-1-4842-1010-9_7.

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Jackson, Benjamin W. "Steam Generators." In Power Plant Engineering, 185–217. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0427-2_7.

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Kolev, Nikolay Ivanov. "Steam Generators." In Multiphase Flow Dynamics 5, 311–61. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15156-4_8.

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Castle, G. S. P. "Ozone Generators." In The Modern Problems of Electrostatics with Applications in Environment Protection, 253–63. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4447-6_18.

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Saha, Sujoy Kumar, Hrishiraj Ranjan, Madhu Sruthi Emani, and Anand Kumar Bharti. "Vortex Generators." In Heat Transfer Enhancement in Plate and Fin Extended Surfaces, 79–88. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20736-6_4.

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Conference papers on the topic "Generators"

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Hosaka, Hiroshi, Yoshinori Oonishi, Yuki Tajima, and Akira Yamashita. "Study on Motor-Driven Gyroscopic Generator: Part 1 — Characteristics at Constant Velocity." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86390.

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A gyroscopic power generator that generates 1.8 W by using a rotor of 100 mm diameter spinning at 500 rpm is developed. In conventional vibrational generators, which use simple vibrations of a inner pendulum, the output power has been less than 10 mW. Gyroscopic generators increase the inertial force by rotating the pendulum at high speed and generate about 100 times greater power than the conventional ones. However, gyro generators have not been able to operate under arbitrary vibrations at wearable sizes because they are unstable and easily stall by disturbances, and the gyro torque and the electromechanical transformation efficiency rapidly decrease by miniaturization. In this paper, first, a theoretical model is developed to clarify the basic characteristics of the generator. Next, a desktop-sized generator that works under any vibration is developed using highly precise motors and gears determined by the theory. Next, mechanical and electrical characteristics are measured to show the validity of the theory. Finally, the performance of wearable-sized generators is predicted to show the generators that have the same device size and rotor spinning speed as those of 2.5” and 3.5” HDD’s generate 0.74 W and 1.84 W, respectively.
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Watanabe, Aya, Ryousuke Yuyama, Hiroshi Hosaka, and Akira Yamashita. "Fundamental Study on Friction-Driven Gyroscopic Power Generator Works Under Arbitrary Vibration." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10474.

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Abstract This paper describes a friction-driven gyro generator that works under arbitrary vibrations and generates more than 1 W of power. Vibrational generators are energy harvesters that convert environmental vibrations into electrical power via the inertial force of pendulums. In conventional generators that use simple vibration, the power is less than 10 mW for a wearable size because vibrations in the natural environment are as low as 1 Hz. Gyroscopic generators increase the inertial force by rotating a pendulum at high speed and creating a gyro effect. In this generator, a palm-size product that generates 0.1 W and weighs 280 g has already been commercialized, but this device operates only under a particular vibration that synchronizes rotor precession and stalls under random vibration. To solve this problem, in this research, two gimbals and a precession spring are introduced to support the rotor. We developed a prototype generator with straight tracks measuring 16 cm × 11 cm × 12 cm with a mass of 980 g. Under a vibration of 4 Hz and ±20 degrees, power generation of 1.6 W was confirmed. Next, a prototype circular track was made. Power generation of 0.2 W with a vibration of 1 Hz and ±90 degrees was confirmed. Finally, a simple formula to estimate the upper limit of the generation power is derived. It is suggested that the circular-type generator is suitable for low-frequency vibration and can generate twice the power of a straight-type generator.
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Hou, Su-Xia, Yun Tai, and Fu-Yu Zhao. "Analysis of Two-Phase Flow Instability for Steam Generator." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48533.

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Two-phase flow instability is an important problem that affects the running of steam generators in nuclear reactor systems. In this paper, two-phase flow instability in parallel channels of a steam generator are analyzed to disclose the mechanism of flow instability by using the frequency domain method. The mathematical expressions of heat transfer and flow for a steam generator are proposed, and the transfer function of the closed-loop system is deduced by using linearization and Laplace transfer. The steam generator’s stability is judged according to Nyquist stability criterion. Depending on this fundamental principal, the computer code is developed to analyze the stability of steam generators. The results displayed two conclusions; firstly, the increase of inlet orifices or mass flow rate enhances the stability of generator steam; secondly, the coupling interactions between channels and their external loop effects on the stability of generator steam are not ignored. The result show that the effects are non-monotonic on the stability of generator steam.
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Cardinal, Paul G. "Generator Pitch and Associated Concerns When Paralleling Generators." In 2009 IEEE Industry Applications Society Annual Meeting. IEEE, 2009. http://dx.doi.org/10.1109/ias.2009.5324867.

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null. "Independent generator perspective: wind turbines as embedded generators." In IEE Colloquium on System Implications of Embedded Generation and its Protection and Control. IEE, 1998. http://dx.doi.org/10.1049/ic:19980394.

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Tan, Xiaohui, and A. K. Soh. "Modeling and Study of Piezoelectric Power Generators." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29100.

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In the present study, a type of power generators of cantilever beam structure has been studied. A dynamic model describing the power generator, which takes into consideration the vibration of the mechanical structure, the power harvesting circuit, and the coupling between them, is proposed. A set of partial differential equations describing the dynamic model are obtained. Stability analysis is then carried out to analyze elementary properties of the generator. By using modal decomposition and state space representation, the set of partial differential equations could be easily solved no matter what the external excitation is, harmonic or non-harmonic, transient or continuous, at or off resonant frequency. The characteristics of the generators are analyzed and some recommendations on design of efficient power generators are provided.
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Eroglu, Adnan, Klaus Döbbeling, Franz Joos, and Philipp Brunner. "Vortex Generators in Lean-Premix Combustion." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-487.

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A novel fuel-air mixing technique on the basis of vortex generators has been developed and successfully implemented in the worlds first lean-premix reheat combustor of ABB’s GT24/GT26 series industrial gas turbines. This technique uses a special arrangement of delta-wing type vortex generators to achieve rapid mixing through longitudinal vortices, which produce low pressure drop and no recirculation zones along the mixing section. In this paper, after a short introduction to the topic, the motivation for utilizing vortex generators and the main considerations in their design are explained. A detailed analysis of the flow field, pressure drop and the strength of the vortices generated by a single vortex generator are presented as one of the three main geometrical parameters is varied. The results obtained through water model tests indicate that an optimum vortex generator geometry exists, which produces the maximum circulation at a relatively low pressure drop price. Moreover, the axial velocity distribution along the mixing section stays uniform enough to assure flash-back free operation despite the elevated inlet temperatures encountered in a reheat combustor. After selecting this optimized geometry, the process of the arrangement of multiple vortex generators in an annular combustor segment is described. The optimum arrangement presented here is suitable both for gaseous and liquid fuel injection, since it requires only one injection location per combustor segment.
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Moore, William G., and Robert Vandenabeele. "Generator failures in pulp and paper mill style generators." In 2009 55th IEEEl Pulp and Paper Industry Technical Conference (PPIC). IEEE, 2009. http://dx.doi.org/10.1109/papcon.2009.5185420.

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Nemcic, Kresimir, and Robert Brems. "Twenty Years of Operation in NPP Krsko." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22130.

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This paper presents the main design and fabrication improvements that were included in the new steam generators that were installed at Nuclear Power Plant Krsko in Slovenia in 2000. These improvements were a result of an on-going R & D effort associated with steam generator technology, aimed at increased reliability and better maintainability of new steam generators. The paper also provides basic information related to 20 years of operation of NPP Krsko with an emphasis on subjects related to steam generator performance and degradation. These include inservice inspection results on steam generators up to replacement, corrective actions, corrosion-erosion counter-measures, and replacement of condenser and moisture spearator reheaters with improved material. The paper also provides data regarding changes in feedwater and steam generator water chemistry, with water chemistry results before and after steam generator replacement. This paper shows that materials issues are very important for steam generator reliability, and it gives the reasons why specific materials were selected for replaced components. Finally, the paper demonstrates how the strategy used at NPP Krsko prolonged the useful life of the old steam generators until replacement steam generators could be designed, fabricated, and installed.
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"Thermoelectric generators." In IECON 2012 - 38th Annual Conference of IEEE Industrial Electronics. IEEE, 2012. http://dx.doi.org/10.1109/iecon.2012.6389125.

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Reports on the topic "Generators"

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Sethuraman, Latha, and Katherine L. Dykes. GeneratorSE: A Sizing Tool for Variable-Speed Wind Turbine Generators. Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1395455.

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Snyder, Lawrence. VSLI Design Generators. Fort Belvoir, VA: Defense Technical Information Center, November 1987. http://dx.doi.org/10.21236/ada188706.

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Horowitz, Mark, Don Stark, Zain Asgar, Omid Azizi, Rehan Hameed, Wajahat Qadeer, Ofer Shacham, and Megan Wachs. Chip Generators Study. Fort Belvoir, VA: Defense Technical Information Center, December 2008. http://dx.doi.org/10.21236/ada505937.

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Butler, J. T., T. Sasao, and S. Nagayama. Numeric Function Generators. Fort Belvoir, VA: Defense Technical Information Center, July 2009. http://dx.doi.org/10.21236/ada548355.

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Adolph, Ralph J., and John D. Tanner. Military Standard Generators Prototype Modifications. Volume 2. 30 kW DoD Generator Set. Fort Belvoir, VA: Defense Technical Information Center, March 1988. http://dx.doi.org/10.21236/ada197014.

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Adolph, Ralph J., and John D. Tanner. Military Standard Generators Prototype Modifications. Volume 3. 60 kW DoD Generator Set. Fort Belvoir, VA: Defense Technical Information Center, March 1988. http://dx.doi.org/10.21236/ada197015.

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Balzer, Robert. Multi-Targeted Program Generators. Fort Belvoir, VA: Defense Technical Information Center, July 2004. http://dx.doi.org/10.21236/ada425426.

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Epstein, A. H., K. S. Breuer, J. H. Lang, M. A. Schmidt, and S. D. Senturia. Micro Gas Turbine Generators. Fort Belvoir, VA: Defense Technical Information Center, December 2000. http://dx.doi.org/10.21236/ada391343.

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Yang, Jiann C., and William L. Grosshandler. Solid propellant gas generators:. Gaithersburg, MD: National Institute of Standards and Technology, 1995. http://dx.doi.org/10.6028/nist.ir.5766.

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Chato, Donna M., Jay B. Chase, and Gerald F. Kiutu. High Voltage Flux Compression Generators. Fort Belvoir, VA: Defense Technical Information Center, April 2008. http://dx.doi.org/10.21236/ada483430.

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