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Artículos de revistas sobre el tema "Power gyrator"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 13 de febrero de 2022

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1

Martínez-García, Herminio y Encarna García-Vilchez. "The Inclusion of Power Gyrator Topologies as Energy Processing Cells in Photovoltaic Solar Conversion". Renewable Energy and Power Quality Journal 19 (septiembre de 2021): 614–18. http://dx.doi.org/10.24084/repqj19.364.

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This paper will provide a classification of high efficiency switching power-gyrator structures and their use as cells for energy processing in photovoltaic solar facilities. Having into account the properties of these topologies presented in the article, their inclusion in solar facilities allows increasing the performance of the whole installation. Therefore, the design, simulation and implementation of a Gtype power gyrator are carried out throughout the text. In addition, in order to obtain the maximum power from the photovoltaic solar panel, a maximum power point tracking (MPPT) is mandatory in the energy processing path. Therefore, the practical implementation carried out includes a control loop of the power gyrator in order to track the aforementioned maximum power point of the photovoltaic solar panel.
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2

Tippetts, John R. "Definition and properties of a Eulerian 3-terminal gyrator". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 461, n.º 2056 (8 de abril de 2005): 957–74. http://dx.doi.org/10.1098/rspa.2004.1407.

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The Eulerian 3-terminal gyrator is a hypothetical element whose novel features relate to systems dominated by dynamic forces. In mechanical linkages, turbomachines, flow networks and many other systems forces are proportional to the square of velocities. This square-law is fundamental in the Eulerian 3-terminal gyrator, unlike the linearity of the conventional gyrator. A gyrator embodies non-reciprocity and, without power loss, exchanges pressure-like and flow-like variables. The name derives from the gyroscope, for which torque and precession rate are linearly related if the gyro speed is constant, but this speed would have to vary to produce a square law relationship. Such so-called ‘internal modulation’ has been viewed askance in the definition of an ideal element. However, despite potential mathematical complexity, a neat definition follows from a coordinate transformation and mapping relating to 3-terminal elements. The resulting characteristics are well-behaved functions. Formulae are derived for the small-signal Z - and Y -parameters and these enable the non-reciprocity to be demonstrated. The large-signal characteristics are compared with those of a fluidic reverse flow diverter applied to process fluid handling. In general, the Eulerian gyrator is proposed as a natural prime element in analytical modelling because it builds in the modulation that must be applied to a linear gyrator in representing systems beyond the confines of electrical networks.
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3

Bello, Mark. "Compact, single-device gyrator attains “Highest ever reported” power-conversion efficiency". Scilight 2017, n.º 13 (18 de septiembre de 2017): 130006. http://dx.doi.org/10.1063/1.5004991.

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4

Wu, Fengchuan, Yuejun Zheng y Yunqi Fu. "Magnetic-Free Nonreciprocal Multifunction Device Based on Switched Delay Lines". Electronics 8, n.º 8 (3 de agosto de 2019): 862. http://dx.doi.org/10.3390/electronics8080862.

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A magnetic-free multifunction nonreciprocal device based on switched delay lines (SDLs) has been proposed in this paper. It is constructed with two double balanced gyrators (DBGs) and four baluns, each pair of differential ports of the balun connect the ports at the same orientation of the two DBGs, respectively. Due to the asymmetry of the clock control signals acting on the switches, the time reversal symmetry of the transmission line between the Gilbert quad-switch-sets (GQSS) can be broken to achieve non-reciprocity. It can be used as a circulator, gyrator, or isolator by setting different control signals. The device has infinite working bandwidth in theory based on the SDLs. Common mode interference can be better suppressed by using differential transmission structures. Moreover, power capacity can be improved compared to the previous work. Then, experiments have been done to verify the device as a circulator. Broadband property and the anti-interference property have been verified.
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5

Premoli, A. y M. Storace. "Two-Port Ideal Power Transferitors: A Unified Introduction to Ideal Transformer and Gyrator". IEEE Transactions on Circuits and Systems II: Express Briefs 51, n.º 8 (agosto de 2004): 426–29. http://dx.doi.org/10.1109/tcsii.2004.832777.

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6

Kubota, Kenichi y Mitsuo Okine. "Realization of a multiport gyrator using current mirror circuits". Electrical Engineering in Japan 139, n.º 4 (25 de abril de 2002): 41–47. http://dx.doi.org/10.1002/eej.1167.

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7

Fahrenthold, E. P. y A. Wu. "Bond Graph Modeling of Continuous Solids in Finite Strain Elastic-Plastic Deformation". Journal of Dynamic Systems, Measurement, and Control 110, n.º 3 (1 de septiembre de 1988): 284–87. http://dx.doi.org/10.1115/1.3152683.

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The physical systems modeling theory of bond graphs may be employed to represent the hysteretic deformation of continuous solids infinite strain elastic-plastic deformation. Second and fourth order tensors represent stress power conjugate variables and transformer or gyrator moduli, respectively, with corresponding inner products generalizing the power flow and modulation calculations of scalar and vector bond graphs. Capacitors and resistors of a tensor type suitably represent strain energy storage, associated flow rules in plasticity, and other familiar concepts. An important application of this simulation technique arises in constitutive modeling studies of nonlinear materials.
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8

Zhang, Jitao, Zhen Wang, Qingfang Zhang, Hewei Zhao, Jie Wu, Jiagui Tao, Liying Jiang y Lingzhi Cao. "Influence of shape on power conversion efficiency of Ni-Zn ferrite/piezoelectric magnetoelectric gyrator". Journal of Physics: Conference Series 1759 (enero de 2021): 012007. http://dx.doi.org/10.1088/1742-6596/1759/1/012007.

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9

Zhuang, Xin, Min Gao, Xiao Tang, Chung-Ming Leung, Junran Xu, Gopalan Srinivasan, Jiefang Li, Haosu S. Luo y Dwight Viehland. "A Piezoelectric Mn-Doped PMN-PT/Metglas Magnetoelectric Gyrator: Enhanced Power Efficiency at Reduced Size". IEEE Sensors Journal 20, n.º 2 (15 de enero de 2020): 752–59. http://dx.doi.org/10.1109/jsen.2019.2943144.

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10

Blumenfeld, Alon, Alon Cervera y Mor Mordechai Peretz. "Enhanced Differential Power Processor for PV Systems: Resonant Switched-Capacitor Gyrator Converter With Local MPPT". IEEE Journal of Emerging and Selected Topics in Power Electronics 2, n.º 4 (diciembre de 2014): 883–92. http://dx.doi.org/10.1109/jestpe.2014.2331277.

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11

Leung, Chung Ming, Junran Xu, Xiao Tang, Min Gao, Jiefang Li y D. Viehland. "A Passive Tunable Magnetoelectric Gyrator: A Highly Efficient Approach to Non-Power Consumable Capacitor Control Methods". IEEE Transactions on Industrial Electronics 68, n.º 2 (febrero de 2021): 1646–53. http://dx.doi.org/10.1109/tie.2020.2970647.

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12

Wu, Fengchuan, Yuejun Zheng, Fang Yuan y Yunqi Fu. "Magnetic-Free Isolators Based on Time-Varying Transmission Lines". Electronics 8, n.º 6 (17 de junio de 2019): 684. http://dx.doi.org/10.3390/electronics8060684.

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Two magnetic-free reconfigurable isolators based on a doubly balanced gyrator (DBG) are designed in this paper. One of the isolators is a single-ended transmission isolator (STI), which uses two matching resistors to absorb the signal transmitted in the reverse direction. In theory, it has infinite isolation bandwidth, which is verified by simulation and an experiment. The other isolator is a differential transmission isolator (DTI) to improve the anti-interference performance, which consists of four Wilkinson power splitters (combiners) and two reciprocal transmission line segments. The DTI uses two pairs of differential signals to prevent the reverse signal. Compared to the STI, the DTI has higher power capacity. Furthermore, when the phases of the control signals acting on the switches are changed, the isolation directions of the two isolators will be changed, to obtain the reconfigurable property.
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13

Zhuang, Xin, Christophe Dolabdjian, Chung Ming Leung, Junran Xu, Jitao Zhang, Gopalan Srinivasan, Jiefang Li y D. Viehland. "Dimension effects of a magnetoelectric gyrator with FeCoSiB/Pb(Zr,Ti)O3 layered composites core for efficient power conversion". Sensors and Actuators A: Physical 302 (febrero de 2020): 111815. http://dx.doi.org/10.1016/j.sna.2019.111815.

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14

Zhang, Jitao, Kang Li, Qingfang Zhang, D. A. Filippov, Jie Wu, Jiagui Tao, Jing Chen, Liying Jiang, Lingzhi Cao y Gopalan Srinivasan. "Effects of magnetic-elastic anisotropy on magnetoelectric gyrator with ferrite/PZT/ferrite laminate for enhancement of power conversion efficiencies". Journal of Magnetism and Magnetic Materials 540 (diciembre de 2021): 168451. http://dx.doi.org/10.1016/j.jmmm.2021.168451.

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15

Tsai, Ching-Han, Chun-Yi Lin, Ching-Piao Liang, Shyh-Jong Chung y Jenn-Hwan Tarng. "Switched Low-Noise Amplifier Using Gyrator-Based Matching Network for TD-LTE/LTE-U/Mid-Band 5G and WLAN Applications". Applied Sciences 11, n.º 4 (6 de febrero de 2021): 1477. http://dx.doi.org/10.3390/app11041477.

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This paper presents a triple-band low-noise amplifier (LNA) fabricated using a 0.18 μm Complementary Metal-Oxide-Semiconductor (CMOS) process. The LNA uses a double-peak load network with a switched component to accomplish the triple-band operation. Moreover, noise reduction using a substrate resistor to ameliorate the noise performance is presented. Noise reduction of 1.5 dB can be achieved at 2.5 GHz without additional dc power and extra manufacturing costs. An input matching technique is realized simultaneously using a gyrator-based feedback topology. The triple-band LNA can be realized by using a dual-band input network with a switched matching mechanism. The target frequencies of the triple-band LNA are 2.3–2.7 GHz, 3.4–3.8 GHz, and 5.1–5.9 GHz, covering the operating frequency bands of time-division long-term evolution (TD-LTE), mid-band Fifth-generation (5G), LTE-unlicensed (LTE-U) band, and Wireless LAN (WLAN) technology. The measured power gains and noise figures at 2.5, 3.5, and 5.2 GHz are 12.3, 15.3, and 13.1 dB and 2.3, 2.2, and 2.6 dB, respectively.
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16

Patel, Dhara P. y Shruti Oza-Rahurkar. "CMOS Active Inductor/Resonator Based Voltage Controlled Oscillator". Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 12, n.º 6 (22 de noviembre de 2019): 500–506. http://dx.doi.org/10.2174/2352096511666181105111852.

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Background: A tunable CMOS active inductor/resonator based Voltage Controlled Oscillator (VCO) has been presented. In the design of LC-VCO, LC resonator (tank) circuit has been substituted with gyrator based CMOS active inductor/resonator. The purity of VCO output signal is defined by the phase noise parameter. Methods: For good spectral purity of VCO output signal, the phase noise should be minimum. Moreover, the quality factor of LC resonator is inversely proportional to the phase noise of VCO output signal. In the presented work, a high-quality active inductor/resonator circuit has been used to design VCO which minimizes the phase noise and chip area as well. Further, other VCO characterization factors are measured. Results: The designed circuit has been implemented in 0.18µm CMOS technology. Conclusion: The design of the proposed AI based voltage controlled oscillator shows better phase noise, less chip area and high output power. The high output power is achieved at the cost of limited tuning range of 1.14 GHz ~ 2.1 GHz. The presented active inductor based voltage controlled oscillator can be used for RF applications from 1.14GHz ~ 2.1GHz.
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17

Patel, Dhara P. y Shruti Oza-Rahurkar. "Tunable CMOS Active Inductor Using Widlar Current Source". Journal of Circuits, Systems and Computers 28, n.º 02 (12 de noviembre de 2018): 1950027. http://dx.doi.org/10.1142/s0218126619500270.

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A novel tuning principle for simple gyrator-based CMOS active inductor (AI) circuit is presented. The method makes use of Widlar current source to enhance the quality factor. The simulation of the proposed AI provides a maximum quality factor of 1819 at 2.88[Formula: see text]GHz. The AI shows the inductive bandwidth of 1.66[Formula: see text]GHz to 3.16[Formula: see text]GHz and power consumption of 6.87[Formula: see text]mW. The other characterization factors such as linearity, supply voltage sensitivity and noise analysis are discussed. The performance of the tunable AI using Widlar current source are compared with the same using a simple current mirror. An AI using a conventional current mirror (CCM) and Widlar current source have been implemented in the 0.18[Formula: see text][Formula: see text]m CMOS technology.
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18

Su, Qian, Xin Liu, Yan Li, Xiaosong Wang, Zhiqiang Wang y Yu Liu. "A Graphical Design Methodology Based on Ideal Gyrator and Transformer for Compensation Topology with Load-Independent Output in Inductive Power Transfer System". Electronics 10, n.º 5 (1 de marzo de 2021): 575. http://dx.doi.org/10.3390/electronics10050575.

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Compensation is crucial in the inductive power transfer system to achieve load-independent constant voltage or constant current output, near-zero reactive power, higher design freedom, and zero-voltage switching of the driver circuit. This article proposes a simple, comprehensive, and innovative graphic design methodology for compensation topology to realize load-independent output at zero-phase-angle frequencies. Four types of graphical models of the loosely coupled transformer that utilize the ideal transformer and gyrator are presented. The combination of four types of models with the source-side/load-side conversion model can realize the load-independent output from the source to load. Instead of previous design methods of solving the equations derived from the circuits, the load-independent frequency, zero-phase angle (ZPA) conditions, and source-to-load voltage/current gain of the compensation topology can be intuitively obtained using the circuit model given in this paper. In addition, not limited to only research of the existing compensation topology, based on the design methodology in this paper, 12 novel compensation topologies that are free from the constraints of transformer parameters and independent of load variations are stated and verified by simulations. In addition, a novel prototype of primary-series inductor–capacitance–capacitance (S/LCC) topology is constructed to demonstrate the proposed design approach. The simulation and experimental results are consistent with the theory, indicating the correctness of the design method.
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19

Singh, Hukum y Mehak Khurana. "An Asymmetric Optical Cryptosystem of Double Image Encryption Based on Optical Vortex Phase Mask Using Gyrator Transform Domain". Recent Advances in Computer Science and Communications 13, n.º 4 (19 de octubre de 2020): 672–85. http://dx.doi.org/10.2174/1385272823666190429155557.

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Background: Optical Vortex (OV) has attracted attention amongst many researchers. Paper proposes a nonlinear scheme of image encryption based on Optical Vortex (OV) and Double Random Phase Encoding (DRPE) in the Gyrator Transform (GT) domain under phase truncation operations. Objective: The amplitude and phase truncation operation in the image encryption generates two decryption keys and convert the method to nonlinear. It has also been proposed opto-electronically. Original image can only be decrypted with correct values of OV, GT rotation angles and Decryption Keys (DKs). Methods: A novel asymmetric image encryption scheme, using optical vortex mask has been proposed in view of amplitude and phase truncation operation. The scheme becomes more strengthened by the parameters used in the Optical Vortex (OV) and by taking the (n)th power operation in the encryption path and (n)th root operation in the decryption path. Results: It shows that for each of the encryption parameters, binary image has greater sensitivity as compared to the grayscale image. This scheme inflates the security by making use of OV-based Structured Phase Mask (SPM) as it expands the key space. The scheme has also been investigated for its robustness and its sensitivity against various attacks such as noise and occlusion attacks under number of iterations. Conclusion: This scheme provides solution to the problem of key space with the use of GT rotational angles and OV phase mask thus enhances the security. The scheme has been verified based on various security parameters such as occlusion, noise attacks, CC, entropy etc.
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20

Ehsani, M., I. Husain y M. O. Bilgic. "Power converters as natural gyrators". IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications 40, n.º 12 (1993): 946–49. http://dx.doi.org/10.1109/81.269036.

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21

Cid-Pastor, A., L. Martinez-Salamero, C. Alonso, A. El Aroudi y H. Valderrama-Blavi. "Power Distribution Based on Gyrators". IEEE Transactions on Power Electronics 24, n.º 12 (diciembre de 2009): 2907–9. http://dx.doi.org/10.1109/tpel.2009.2023217.

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22

Singer, S. "Gyrators Application in Power Processing Circuits". IEEE Transactions on Industrial Electronics IE-34, n.º 3 (agosto de 1987): 313–18. http://dx.doi.org/10.1109/tie.1987.350978.

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23

Zhuang, X., C. M. Leung, J. Li y D. Viehland. "Power conversion process in magnetoelectric gyrators". Applied Physics Letters 111, n.º 10 (4 de septiembre de 2017): 103902. http://dx.doi.org/10.1063/1.4999371.

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24

Cid-Pastor, A., L. Martinez-Salamero, C. Alonso, G. Schweitz, J. Calvente y S. Singer. "Classification and synthesis of power gyrators". IEE Proceedings - Electric Power Applications 153, n.º 6 (2006): 802. http://dx.doi.org/10.1049/ip-epa:20050413.

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25

Zhuang, X., C. M. Leung, G. Sreenivasulu, M. Gao, J. Zhang, G. Srinivasan, J. Li y D. Viehland. "Upper limit for power conversion in magnetoelectric gyrators". Applied Physics Letters 111, n.º 16 (16 de octubre de 2017): 163902. http://dx.doi.org/10.1063/1.5001165.

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26

Moncada, Manuel, Patricio Toledo, Fernando Betancourt y Cristian G. Rodríguez. "Torque Analysis of a Gyratory Crusher with the Discrete Element Method". Minerals 11, n.º 8 (13 de agosto de 2021): 878. http://dx.doi.org/10.3390/min11080878.

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Comminution by gyratory crusher is the first stage in the size reduction operation in mineral processing. In the copper industry, these machines are widely utilized, and their reliability has become a relevant aspect. To optimize the design and to improve the availability of gyratory crushers, it is necessary to calculate their power and torque accurately. The discrete element method (DEM) has been commonly used in several mining applications and is a powerful tool to predict the necessary power required in the operation of mining machines. In this paper, a DEM model was applied to a copper mining gyratory crusher to perform a comprehensive analysis of the loads in the mantle, the crushing torque, and crushing power. A novel polar representation of the radial forces is proposed that may help designers, engineers, and operators to recognize the distribution of force loads on the mantle in an easier and intuitive way. Simulations with different operational conditions are presented and validated through a comparison with nominal data. A calculation procedure for the crushing power of crushers is presented, and recommendations for the selection of the minimum resolved particle size are given.
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27

Leung, Chung Ming, Xin Zhuang, Min Gao, Xiao Tang, Junran Xu, Jiefang Li, Jitao Zhang, G. Srinivasan y D. Viehland. "Enhanced stability of magnetoelectric gyrators under high power conditions". Applied Physics Letters 111, n.º 18 (30 de octubre de 2017): 182901. http://dx.doi.org/10.1063/1.5001287.

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28

Cid-Pastor, A., G. Schweitz, L. Martinez-Salamero, C. Alonso, J. Calvente y S. Singer. "Synthesis of power gyrators operating at constant switching frequency". IEE Proceedings - Electric Power Applications 153, n.º 6 (2006): 842. http://dx.doi.org/10.1049/ip-epa:20050529.

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29

Tanner, John J. "Empirical power laws for the radii of gyration of protein oligomers". Acta Crystallographica Section D Structural Biology 72, n.º 10 (15 de septiembre de 2016): 1119–29. http://dx.doi.org/10.1107/s2059798316013218.

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The radius of gyration is a fundamental structural parameter that is particularly useful for describing polymers. It has been known since Flory's seminal work in the mid-20th century that polymers show a power-law dependence, where the radius of gyration is proportional to the number of residues raised to a power. The power-law exponent has been measured experimentally for denatured proteins and derived empirically for folded monomeric proteins using crystal structures. Here, the biological assemblies in the Protein Data Bank are surveyed to derive the power-law parameters for protein oligomers having degrees of oligomerization of 2–6 and 8. The power-law exponents for oligomers span a narrow range of 0.38–0.41, which is close to the value of 0.40 obtained for monomers. This result shows that protein oligomers exhibit essentially the same power-law behavior as monomers. A simple power-law formula is provided for estimating the oligomeric state from an experimental measurement of the radius of gyration. Several proteins in the Protein Data Bank are found to deviate substantially from power-law behavior by having an atypically large radius of gyration. Some of the outliers have highly elongated structures, such as coiled coils. For coiled coils, the radius of gyration does not follow a power law and instead scales linearly with the number of residues in the oligomer. Other outliers are proteins whose oligomeric state or quaternary structure is incorrectly annotated in the Protein Data Bank. The power laws could be used to identify such errors and help prevent them in future depositions.
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30

Leung, Chung Ming, Xin Zhuang, Junran Xu, G. Srinivasan, Jiefang Li y D. Viehland. "Power conversion efficiency and resistance tunability in coil-magnetoelectric gyrators". Applied Physics Letters 109, n.º 20 (14 de noviembre de 2016): 202907. http://dx.doi.org/10.1063/1.4967846.

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31

Cid-Pastor, A., L. Martinez-Salamero, C. Alonso, B. Estibals, J. Alzieu, G. Schweitz y D. Shmilovitz. "Analysis and design of power gyrators in sliding-mode operation". IEE Proceedings - Electric Power Applications 152, n.º 4 (2005): 821. http://dx.doi.org/10.1049/ip-epa:20045108.

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32

Cid-Pastor, Angel, Luis Martinez-Salamero, Corinne Alonso, Ramon Leyva y Sigmund Singer. "Paralleling DC–DC Switching Converters by Means of Power Gyrators". IEEE Transactions on Power Electronics 22, n.º 6 (noviembre de 2007): 2444–53. http://dx.doi.org/10.1109/tpel.2007.909311.

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Zhang, Jitao, Weiwei Zhu, D. A. Filippov, Wei He, Dongyu Chen, Kang Li, Shengtao Geng et al. "Highly efficient power conversion in magnetoelectric gyrators with high quality factor". Review of Scientific Instruments 90, n.º 1 (enero de 2019): 015004. http://dx.doi.org/10.1063/1.5082833.

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34

Zhuang, Xin, Chung Ming Leung, Jiefang Li, Gopalan Srinivasan y Dwight Viehland. "Power Conversion Efficiency and Equivalent Input Loss Factor in Magnetoelectric Gyrators". IEEE Transactions on Industrial Electronics 66, n.º 4 (abril de 2019): 2499–505. http://dx.doi.org/10.1109/tie.2018.2844812.

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35

Cid-Pastor, A., L. Martinez-Salamero, R. Leyva, J. Calvente y R. Giral. "Design of photovoltaic-based current sources for maximum power transfer by means of power gyrators". IET Power Electronics 4, n.º 6 (2011): 674. http://dx.doi.org/10.1049/iet-pel.2010.0190.

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36

Dai, Bingcun, Fan Zhang, Domenico Tarzia y Kwangwon Ahn. "Forecasting Financial Crashes: Revisit to Log-Periodic Power Law". Complexity 2018 (1 de agosto de 2018): 1–12. http://dx.doi.org/10.1155/2018/4237471.

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We aim to provide an algorithm to predict the distribution of the critical times of financial bubbles employing a log-periodic power law. Our approach consists of a constrained genetic algorithm and an improved price gyration method, which generates an initial population of parameters using historical data for the genetic algorithm. The key enhancements of price gyration algorithm are (i) different window sizes for peak detection and (ii) a distance-based weighting approach for peak selection. Our results show a significant improvement in the prediction of financial crashes. The diagnostic analysis further demonstrates the accuracy, efficiency, and stability of our predictions.
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37

Chen, Qun y Yuzhi Li. "SGC Tests for Influence of Material Composition on Compaction Characteristic of Asphalt Mixtures". Scientific World Journal 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/735640.

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Compaction characteristic of the surface layer asphalt mixture (13-type gradation mixture) was studied using Superpave gyratory compactor (SGC) simulative compaction tests. Based on analysis of densification curve of gyratory compaction, influence rules of the contents of mineral aggregates of all sizes and asphalt on compaction characteristic of asphalt mixtures were obtained. SGC Tests show that, for the mixture with a bigger content of asphalt, its density increases faster, that there is an optimal amount of fine aggregates for optimal compaction and that an appropriate amount of mineral powder will improve workability of mixtures, but overmuch mineral powder will make mixtures dry and hard. Conclusions based on SGC tests can provide basis for how to adjust material composition for improving compaction performance of asphalt mixtures, and for the designed asphalt mixture, its compaction performance can be predicted through these conclusions, which also contributes to the choice of compaction schemes.
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38

Soiolmaa, Ts, N. Sugir-Erdene, D. Baasanzhav, L. Munkhtuul y E. Otgonzhargal. "Comparative study on concentration properties of iron deposits (Mongolia)". Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal, n.º 2 (30 de marzo de 2020): 44–51. http://dx.doi.org/10.21440/0536-1028-2020-2-44-51.

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Research aims to compare magnetic flotation results of iron deposits of Mongolia in order to obtain iron concentrate with low sulfur content that meets the standard of raw materials for metallurgical production. Research methodology. Representative samples were taken from Tumurtei deposit in Khuder soum (Selenge province), Tumur Tolgoi deposit (Darkhan-Uul province) and Chandmani Uul deposit (Dornogobi province). Iron grade in the primary ore from Tumurtei deposit was 42.03%, in Tumurtolgoi ore – 46.57% and in Chandmani-Uul ore–43.59%. The ore was crushed into 1 mm size through java crusher and gyratory crusher for the first stage. Dry magnetic concentration was conducted on the ore samples using Boxmag Rapid LR-1.4 Induced Magnetic Separator (the UK). The test work was conducted under the condition when the distance between gyrator of separator and rotation speed are constant and by this time magnetic strength was changed. At the next stage the concentrate of dry magnetic concentration was processed by wet magnetic separation. In order to reduce the sulfur content in the ore from Tumur tolgoi and Tumurtei deposits, flotation experiments were also conducted using UK Denver flotation machine. Ore and concentrator grade were determined using traditional titer method and X-ray fluorescence spectrometer (XRF), the mineral contents was analyzed by X-ray powder diffraction (XRD), elements in product of wet magnetic separator and final concentrate were analyzed using SEM-EDX, the thermal-gravy meter analysis was conducted using instrument TG/DTA7300. Results. Wet magnetic concentration of dry magnetic separation concentrates of all the studied ore allow obtaining concentrates with the high content of iron – from 64% to 66%. Flotation of the concentrate of wet magnetic concentration made it possible to reach iron content in Tumurtei and Tumurtolgoi deposits of 69.02% and 62.86% correspondingly and reduce Sulphur content to 0.2%, 0.48% correspondingly. This study covers the field of flotation technology to extract products with lower sulfur content which meet standard of modern metallurgical industry.
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39

Kiss, Daniel, Takashi Hisakado, Tohlu Matsushima y Osami Wada. "Peer-to-Peer Energy Transfer by Power Gyrators Based on Time-Variable-Transformer Concept". IEEE Transactions on Power Electronics 34, n.º 8 (agosto de 2019): 8230–40. http://dx.doi.org/10.1109/tpel.2018.2882129.

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40

Zhang, Jitao, Weiwei Zhu, Dongyu Chen, Hongwei Qu, Peng Zhou, Maksym Popov, Liying Jiang, Lingzhi Cao y Gopalan Srinivasan. "Magnetoelectric effects and power conversion efficiencies in gyrators with compositionally-graded ferrites and piezoelectrics". Journal of Magnetism and Magnetic Materials 473 (marzo de 2019): 131–35. http://dx.doi.org/10.1016/j.jmmm.2018.10.068.

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41

Leung, Chung Ming, G. Sreenivasulu, Xin Zhuang, Min Gao, Xiao Tang, Junran Xu, Jiefang Li, G. Srinivasan y D. Viehland. "Stability enhancement of yttrium substituted nickel zinc ferrite/PZT magnetoelectric gyrators under high power conditions". Applied Physics Letters 112, n.º 24 (11 de junio de 2018): 242901. http://dx.doi.org/10.1063/1.5037339.

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42

Leung, Chung Ming, Xin Zhuang, Junran Xu, Jiefang Li, G. Srinivasan y D. Viehland. "Importance of composite parameters in enhanced power conversion efficiency of Terfenol-D/PZT magnetoelectric gyrators". Applied Physics Letters 110, n.º 11 (13 de marzo de 2017): 112904. http://dx.doi.org/10.1063/1.4978751.

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43

Saad, Mohamed y Eduard Alarcón. "Insights into Dynamic Tuning of Magnetic-Resonant Wireless Power Transfer Receivers Based on Switch-Mode Gyrators". Energies 11, n.º 2 (20 de febrero de 2018): 453. http://dx.doi.org/10.3390/en11020453.

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44

Chen, Qun. "Analysis of Influence Rules of Material Composition on Compaction Characteristic of Asphalt Mixtures Using SGC Tests". Advanced Materials Research 152-153 (octubre de 2010): 1289–92. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.1289.

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Through analysis of densification curve characteristic of gyratory compaction, influence rules of the content of mineral aggregates of all sizes and asphalt on compaction characteristic of mixtures were studied. Test studies show that the mixture having more of asphalt has a faster density-increasing speed, that there is an optimal amount of fine aggregates for optimal compaction, and that an appropriate amount of mineral powder will improve workability of mixtures but overmuch mineral powder will make mixtures dry and hard. Conclusions from this research can provide basis for how to adjust material composition for improving compaction performance of mixtures.
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45

Arena, Sara L., Kelsey McLaughlin, Anh-Dung Nguyen, James M. Smoliga y Kevin R. Ford. "A Comparison of Body Segment Inertial Parameter Estimation Methods and Joint Moment and Power Calculations During a Drop Vertical Jump in Collegiate Female Soccer Players". Journal of Applied Biomechanics 33, n.º 1 (febrero de 2017): 76–79. http://dx.doi.org/10.1123/jab.2016-0029.

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Athletic individuals may differ in body segment inertial parameter (BSIP) estimates due to differences in body composition, and this may influence calculation of joint kinetics. The purposes of this study were to (1) compare BSIPs predicted by the method introduced by de Leva1 with DXA-derived BSIPs in collegiate female soccer players, and (2) examine the effects of these BSIP estimation methods on joint moment and power calculations during a drop vertical jump (DVJ). Twenty female NCAA Division I soccer players were recruited. BSIPs of the shank and thigh (mass, COM location, and radius of gyration) were determined using de Leva’s method and analysis of whole-body DXA scans. These estimates were used to determine peak knee joint moments and power during the DVJ. Compared with DXA, de Leva’s method located the COM more distally in the shank (P = .008) and more proximally in the thigh (P < .001), and the radius of gyration of the thigh to be further from the thigh COM (P < .001). All knee joint moment and power measures were similar between methods. These findings suggest that BSIP estimation may vary between methods, but the impact on joint moment calculations during a dynamic task is negligible.
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46

Herreros-Cedrés, J., C. Hernández-Rodríguez y R. Guerrero-Lemus. "Optical Activity of Deuterated Analog of L-Arginine Phosphate Single Crystals". Materials Science Forum 480-481 (marzo de 2005): 43–52. http://dx.doi.org/10.4028/www.scientific.net/msf.480-481.43.

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The complete optical gyration tensor of monoclinic pure L-arginine phosphate monohydrate (LAP) and deuterated LAP (d-LAP) crystals has been determined. Variation of the optical activity in the presence of birefringence of d-LAP crystal with pure LAP is found from the high-accuracy universal polarimeter (HAUP) method at a wavelength of 632.8 nm. The gyration tensor components in terms of rotatory power were found to be r11 = -6.6(3) º/mm, r22 = 19(2) º/mm; r33 = 49.7(7) º/mm; and r13 = -43.7(8) º/mm for the LAP, and r11 = -1.2(1) º/mm, r22 = 5.0(4) º/mm; r33 = 41.4(3) º/mm; and r13 = -38.0(4) º/mm for d-LAP at room temperature.
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47

Zhang, Jitao, Hewei Zhao, Qingfang Zhang, D. A. Filippov, Jie Wu, Jiagui Tao, Liying Jiang, Lingzhi Cao y Gopalan Srinivasan. "Disentangling the power transfer process by non-contact optical measurement in nickel-zinc ferrite/piezoelectric magnetoelectric gyrators". Journal of Magnetism and Magnetic Materials 524 (abril de 2021): 167680. http://dx.doi.org/10.1016/j.jmmm.2020.167680.

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48

KIM, AHYOUNG, J. W. WU, S. H. HAN, BYOUNGCHOO PARK y HIDEO TAKEZOE. "ELECTRO-OPTIC AND ELECTRO-GYRATION EFFECTS IN CHIRAL MOLECULAR SYSTEMS". Journal of Nonlinear Optical Physics & Materials 13, n.º 03n04 (diciembre de 2004): 397–404. http://dx.doi.org/10.1142/s0218863504002018.

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The linear electro-optic (EO) and electro-gyration (EG) effects are studied in an optically active material systems including Bi 12 SiO 20 (BSO) oxide and bent-core liquid crystals. In an isotropic BSO sample, the breaking of intrinsic centro-symmetry allowed the EO modulation of the refractive index. In a mixture of bent-shaped liquid crystalline molecules having both optical activity and birefringence, the observed intensity modulation is investigated, which is related to the nonlinear optical responses of both the optical rotatory power and the birefringence. Both the linear EO and EG effects are understood in terms of the superposition principle of linear and circular birefringences.
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49

Smilgies, Detlef-M. y Ewa Folta-Stogniew. "Molecular weight–gyration radius relation of globular proteins: a comparison of light scattering, small-angle X-ray scattering and structure-based data". Journal of Applied Crystallography 48, n.º 5 (20 de septiembre de 2015): 1604–6. http://dx.doi.org/10.1107/s1600576715015551.

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The molecular weight–gyration radius relation for a number of globular proteins based on experimental light scattering data is compared with small-angle X-ray scattering data recently published by Mylonas & Svergun [J. Appl. Cryst.(2007),40, s245–s249]. In addition, other recent experimental data and theoretical calculations are reviewed. It is found that theMW–Rgrelation for the globular proteins is well represented by a power law with an exponent of 0.37 (2).
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50

HUANG, KERSON. "PROTEIN FOLDING STAGES AND UNIVERSAL EXPONENTS". Modern Physics Letters B 24, n.º 20 (10 de agosto de 2010): 2113–15. http://dx.doi.org/10.1142/s0217984910024602.

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We propose three stages in protein folding, based on physical arguements involving the interplay between the hydrophobic effect and hydrogen bonding, and computer simulations using the CSAW (conditioned self-avoiding walk) model. These stages are characterized by universal exponents ν = 3/5, 3/7, 2/5 in the power law R ~ Nν, where R is the radius of gyration and N is the number of residues. They correspond to the experimentally observed stages: unfolded, preglobule, molten globule.
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