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Автор: Grafiati

Опубліковано: 11 вересня 2023

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1

Ozawa, Akira, and Thomas Udem. "Very large bandwidth lasers." Nature Photonics 15, no. 4 (March 16, 2021): 247–49. http://dx.doi.org/10.1038/s41566-021-00788-w.

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2

Fuss, Ian. "Cryogenic large bandwidth acoustooptic deflectors." Applied Optics 26, no. 7 (April 1, 1987): 1222. http://dx.doi.org/10.1364/ao.26.001222.

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3

Johnson, Aaron, Rob Jansen, Nicholas Hopper, Aaron Segal, and Paul Syverson. "PeerFlow: Secure Load Balancing in Tor." Proceedings on Privacy Enhancing Technologies 2017, no. 2 (April 1, 2017): 74–94. http://dx.doi.org/10.1515/popets-2017-0017.

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Abstract We present PeerFlow, a system to securely load balance client traffic in Tor. Security in Tor requires that no adversary handle too much traffic. However, Tor relays are run by volunteers who cannot be trusted to report the relay bandwidths, which Tor clients use for load balancing. We show that existing methods to determine the bandwidths of Tor relays allow an adversary with little bandwidth to attack large amounts of client traffic. These methods include Tor’s current bandwidth-scanning system, TorFlow, and the peer-measurement system EigenSpeed. We present an improved design called PeerFlow that uses a peer-measurement process both to limit an adversary’s ability to increase his measured bandwidth and to improve accuracy. We show our system to be secure, fast, and efficient. We implement PeerFlow in Tor and demonstrate its speed and accuracy in large-scale network simulations.

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4

ÖZSOY, Şeyma Nur, and Sevilay KİLMEN. "Comparison of Kernel equating methods under NEAT and NEC designs." International Journal of Assessment Tools in Education 10, no. 1 (March 15, 2023): 56–75. http://dx.doi.org/10.21449/ijate.981367.

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In this study, Kernel test equating methods were compared under NEAT and NEC designs. In NEAT design, Kernel post-stratification and chain equating methods taking into account optimal and large bandwidths were compared. In the NEC design, gender and/or computer/tablet use was considered as a covariate, and Kernel test equating methods were performed by using these covariates and considering bandwidths. The study shows that, in the NEAT design, Kernel chain equating methods exhibit higher error than the post-stratification equating methods do since the lowest error in the NEC design was obtained from the Kernel equating method with large bandwidth through the computer/tablet variable. Kernel test equating results based on the NEC design, which considers gender and computer tablet use variables as a covariate separately, showed lower SEE than that of the NEC pattern, which takes these variables together as covariates. In terms of the bandwidth, when all methods are compared within the pattern used (i.e., NEAT and NEC), it has been seen that generally Kernel test equating with large bandwidth results in fewer errors than the Kernel test equating with optimal bandwidth. When the NEAT and NEC designs are compared generally, the NEAT design has a lower SEE than that of the NEC design.

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5

Croq, F., and A. Papiernik. "Large bandwidth aperture-coupled microstrip antenna." Electronics Letters 26, no. 16 (1990): 1293. http://dx.doi.org/10.1049/el:19900832.

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6

Søndergaard, Thomas, and Andrei Lavrinenko. "Large-bandwidth planar photonic crystal waveguides." Optics Communications 203, no. 3-6 (March 2002): 263–70. http://dx.doi.org/10.1016/s0030-4018(02)01172-0.

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7

Thouin, Frederic, Mark Coates, and Michael Rabbat. "Large scale probabilistic available bandwidth estimation." Computer Networks 55, no. 9 (June 2011): 2065–78. http://dx.doi.org/10.1016/j.comnet.2011.02.011.

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8

Barreiro-Ures, Daniel, Ricardo Cao, and Mario Francisco-Fernández. "Bandwidth Selection in Nonparametric Regression with Large Sample Size." Proceedings 2, no. 18 (September 17, 2018): 1166. http://dx.doi.org/10.3390/proceedings2181166.

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In the context of nonparametric regression estimation, the behaviour of kernel methods such as the Nadaraya-Watson or local linear estimators is heavily influenced by the value of the bandwidth parameter, which determines the trade-off between bias and variance. This clearly implies that the selection of an optimal bandwidth, in the sense of minimizing some risk function (MSE, MISE, etc.), is a crucial issue. However, the task of estimating an optimal bandwidth using the whole sample can be very expensive in terms of computing time in the context of Big Data, due to the computational complexity of some of the most used algorithms for bandwidth selection (leave-one-out cross validation, for example, has O ( n 2 ) complexity). To overcome this problem, we propose two methods that estimate the optimal bandwidth for several subsamples of our large dataset and then extrapolate the result to the original sample size making use of the asymptotic expression of the MISE bandwidth. Preliminary simulation studies show that the proposed methods lead to a drastic reduction in computing time, while the statistical precision is only slightly decreased.

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9

Grose, John H., Joseph W. Hall, and Madhu B. Dev. "MLD in Children." Journal of Speech, Language, and Hearing Research 40, no. 4 (August 1997): 955–59. http://dx.doi.org/10.1044/jslhr.4004.955.

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The first aim of this study was to obtain a more detailed picture of the effect of masker bandwidth (20 Hz to 1000 Hz bandwidth) on the masking level difference (MLD) for a 500-Hz signal as a function of listener age. The results of the pure-tone signal experiment showed that the MLDs of older children differed from adults only for the narrowest masker bandwidth. In contrast, children younger than about 7 years of age tended to have smaller MLDs than adults at all but the widest masker bandwidths. These results suggest that the younger the listener, the wider the noise bandwidth must be for MLDs of adult magnitude to be observed. One interpretation of this effect is that younger listeners require relatively great spectral dissimilarity (and, therefore perceptual dissimilarity) between the signal and masker in order to obtain MLDs of adult magnitude. The second aim of this study was to test this possibility by determining the MLD for noise signals in cases where the signal and masker bandwidths were the same. The results of this experiment showed that the MLDs of children were as large as those of adults when the signal/masker bandwidth was 320 Hz, but were smaller than those of adults when the signal/masker bandwidth was 20 Hz. This indicates that the factor limiting the MLD for narrowband noise in children is related more to the masker bandwidth than to the perceptual similarity between the signal and the masker.

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10

Ngo, K. D. T., S. Kirachaiwanich, and M. Walters. "Buck modulator with improved large-power bandwidth." IEEE Transactions on Aerospace and Electronic Systems 38, no. 4 (October 2002): 1335–43. http://dx.doi.org/10.1109/taes.2002.1145754.

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11

Levine, E., S. Shtrikman, and D. Treves. "Double-sided printed arrays with large bandwidth." IEE Proceedings H Microwaves, Antennas and Propagation 135, no. 1 (1988): 54. http://dx.doi.org/10.1049/ip-h-2.1988.0010.

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12

Christov, I. P., and I. V. Tomov. "Large bandwidth pulse compression with diffraction gratings." Optics Communications 58, no. 5 (July 1986): 338–42. http://dx.doi.org/10.1016/0030-4018(86)90240-3.

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13

Giusi, Gino, Gianluca Cannatà, Graziella Scandurra, and Carmine Ciofi. "Ultra-low-noise large-bandwidth transimpedance amplifier." International Journal of Circuit Theory and Applications 43, no. 10 (August 14, 2014): 1455–73. http://dx.doi.org/10.1002/cta.2015.

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14

Wu, Ji, Li Liang, Kefeng Tu, Kunying Li, Zi Wang, and Guoqiang Lü. "Serrated periodic electrode for high energy efficiency and large bandwidth acousto-optic modulators." Chinese Optics Letters 21, no. 3 (2023): 031403. http://dx.doi.org/10.3788/col202321.031403.

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15

Cui, Zhichao, Haigang Hou, Shahid Hussain, Guiwu Liu, and Guanjun Qiao. "Study on Innovative Flexible Design Method for Thin Film Narrow Band-Pass Filters." Journal of Nanoelectronics and Optoelectronics 17, no. 1 (January 1, 2022): 112–20. http://dx.doi.org/10.1166/jno.2022.3176.

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Анотація:

The thin film narrow band-pass filters are widely used in precision optical systems such as gas detection, fiber optic communication and optical analysis instruments due to their unique optical characteristics. However, as the applications become more widespread, the problems of regulating the half bandwidth and cut-off bandwidth of the thin film narrow band-pass filters based on the Fabry-Perot (F-P) principle are becoming more apparent. In this work, we took the thin film narrow band-pass filter with a center wavelength of 450 nm as the design target, and comprehensively optimized the film system based on standard F-P principle to obtain the film systems with different half bandwidths and their systematic adjustment methods. The half bandwidth can be adjusted effectively by using the conventional half bandwidth control methods such as increasing the interference orders and the number of mirror layers or the cavities, but it is quite difficult to accurately obtain the filters with various half bandwidths since the adjustment range is too large. Based on the principle of equivalent refractive index, the optical thicknesses of the high and low refractive index film layers of the mirror layers were modified in an unconventional way, and thus the half bandwidth can be flexibly adjusted. Moreover, the standard F-P narrow band-pass filter film system was also modified by the principle of induced transmission film system to achieve a significant broadening of the cut-off bandwidth.

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16

Koepfli, Stefan M., Michael Baumann, Yesim Koyaz, Robin Gadola, Arif Güngör, Killian Keller, Yannik Horst, et al. "Metamaterial graphene photodetector with bandwidth exceeding 500 gigahertz." Science 380, no. 6650 (June 16, 2023): 1169–74. http://dx.doi.org/10.1126/science.adg8017.

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Although graphene has met many of its initially predicted optoelectronic, thermal, and mechanical properties, photodetectors with large spectral bandwidths and extremely high frequency responses remain outstanding. In this work, we demonstrate a >500 gigahertz, flat–frequency response, graphene-based photodetector that operates under ambient conditions across a 200-nanometer-wide spectral band with center wavelengths adaptable from <1400 to >4200 nanometers. Our detector combines graphene with metamaterial perfect absorbers with direct illumination from a single-mode fiber, which breaks with the conventional miniaturization of photodetectors on an integrated photonic platform. This design allows for much higher optical powers while still allowing record-high bandwidths and data rates. Our results demonstrate that graphene photodetectors can outperform conventional technologies in terms of speed, bandwidth, and operation across a large spectral range.

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17

Kakoyiannis, Constantine G., and Philip Constantinou. "Compact Printed Arrays with Embedded Coupling Mitigation for Energy-Efficient Wireless Sensor Networking." International Journal of Antennas and Propagation 2010 (2010): 1–18. http://dx.doi.org/10.1155/2010/596291.

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Wireless sensors emerged as narrowband, resource-constrained devices to provide monitoring services over a wide life span. Future applications of sensor networks are multimedia-driven and include sensor mobility. Thus, sensors must combine small size, large bandwidth, and diversity capabilities. Compact arrays, offering transmit/receive diversity, suffer from strong mutual coupling (MC), which causes lower antenna efficiency, loss of bandwidth, and signal correlation. An efficient technique to reduce coupling in compact arrays is described herein: a defect was inserted in the ground plane (GNDP) area between each pair of elements. The defect disturbed the GNDP currents and offered multidecibel coupling suppression, bandwidth recovery, and reduction of in-band correlation. Minimal pattern distortion was estimated. Computational results were supported by measurements. The bandwidth of unloaded arrays degraded gracefully from 38% to 28% with decreasing interelement distance (0.25 to 0.10). Defect-loaded arrays exhibited active impedance bandwidths 37–45%, respectively. Measured coupling was reduced by 15–20 dB.

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18

Ma, Yanyan, Rong Wu, and Longfei Li. "Research on slow light transmission with wide bandwidth and large normalized delay bandwidth product." Optoelectronics Letters 17, no. 7 (July 2021): 407–11. http://dx.doi.org/10.1007/s11801-021-0125-3.

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19

Hachi, Asmae, Hassan Lebbar, and Mohamed Himdi. "3D PRINTED LARGE BANDWIDTH NEW YAGI-UDA ANTENNA." Progress In Electromagnetics Research Letters 88 (2020): 129–35. http://dx.doi.org/10.2528/pierl19101303.

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20

Oner, B. B., K. Üstün, H. Kurt, A. K. Okyay, and G. Turhan-Sayan. "Large bandwidth mode order converter by differential waveguides." Optics Express 23, no. 3 (February 3, 2015): 3186. http://dx.doi.org/10.1364/oe.23.003186.

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21

Chang, H. S., K. J. Satzinger, Y. P. Zhong, A. Bienfait, M. H. Chou, C. R. Conner, É. Dumur, et al. "A fast and large bandwidth superconducting variable coupler." Applied Physics Letters 117, no. 24 (December 14, 2020): 244001. http://dx.doi.org/10.1063/5.0028840.

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22

Jones, M. C. "KERNEL DENSITY ESTIMATION WHEN THE BANDWIDTH IS LARGE." Australian Journal of Statistics 35, no. 3 (September 1993): 319–26. http://dx.doi.org/10.1111/j.1467-842x.1993.tb01339.x.

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23

Lee, S., and J. H. Han. "Undulator operation for PAL-XFEL large bandwidth modes." Journal of Instrumentation 13, no. 08 (August 14, 2018): T08007. http://dx.doi.org/10.1088/1748-0221/13/08/t08007.

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24

Ginis, Vincent, Philippe Tassin, Thomas Koschny, and Costas M. Soukoulis. "Broadband metasurfaces enabling arbitrarily large delay-bandwidth products." Applied Physics Letters 108, no. 3 (January 18, 2016): 031601. http://dx.doi.org/10.1063/1.4939979.

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25

Pieraccini, M., A. Bicci, D. Mecatti, G. Macaluso, and C. Atzeni. "Propagation of Large Bandwidth Microwave Signals in Water." IEEE Transactions on Antennas and Propagation 57, no. 11 (November 2009): 3612–18. http://dx.doi.org/10.1109/tap.2009.2025674.

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26

Wojtczuk, S. J., J. M. Ballantyne, Y. K. Chen, and S. Wanuga. "Monolithically integrated, photoreceiver with large, gain-bandwidth product." Electronics Letters 23, no. 11 (May 21, 1987): 574–76. http://dx.doi.org/10.1049/el:19870411.

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27

Morrow, I., and J. R. James. "Sequentially rotated large bandwidth circularly polarised printed antennas." Electronics Letters 31, no. 24 (November 23, 1995): 2062–64. http://dx.doi.org/10.1049/el:19951452.

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28

Khan, Salman Naeem, Xueguan Liu, Lvxia Shao, and Ying Wang. "COMPLEMENTARY SPLIT RING RESONATORS OF LARGE STOP BANDWIDTH." Progress In Electromagnetics Research Letters 14 (2010): 127–32. http://dx.doi.org/10.2528/pierl10033105.

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29

Lewis, J. M. "Bandwidth utilization of a large local area network." IEEE Communications Magazine 27, no. 2 (February 1989): 25–30. http://dx.doi.org/10.1109/35.17650.

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30

Rainal, A. J. "Bandwidth from a large excursion of Gaussian noise." IEEE Transactions on Instrumentation and Measurement 40, no. 4 (1991): 688–93. http://dx.doi.org/10.1109/19.85335.

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31

Jiang, Jingyan, Liang Hu, Chenghao Hu, Jiate Liu, and Zhi Wang. "BACombo—Bandwidth-Aware Decentralized Federated Learning." Electronics 9, no. 3 (March 5, 2020): 440. http://dx.doi.org/10.3390/electronics9030440.

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Анотація:

The emerging concern about data privacy and security has motivated the proposal of federated learning. Federated learning allows computing nodes to only synchronize the locally- trained models instead of their original data in distributed training. Conventional federated learning architecture, inherited from the parameter server design, relies on highly centralized typologies and large nodes-to-server bandwidths. However, in real-world federated learning scenarios, the network capacities between nodes are highly uniformly distributed and smaller than that in data centers. As a result, how to efficiently utilize network capacities between computing nodes is crucial for conventional federated learning. In this paper, we propose Bandwidth Aware Combo (BACombo), a model segment level decentralized federated learning, to tackle this problem. In BACombo, we propose a segmented gossip aggregation mechanism that makes full use of node-to-node bandwidth for speeding up the communication time. Besides, a bandwidth-aware worker selection model further reduces the transmission delay by greedily choosing the bandwidth-sufficient worker. The convergence guarantees are provided for BACombo. The experimental results on various datasets demonstrate that the training time is reduced by up to 18 times that of baselines without accuracy degrade.

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32

Zhao, Lei, Lei Shi, and Congying Zhu. "New Nonlinear Second-Order Phase-Locked Loop with Adaptive Bandwidth Regulation." Electronics 7, no. 12 (November 23, 2018): 346. http://dx.doi.org/10.3390/electronics7120346.

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Synchronization of large acquisition bandwidth brings great challenges to the traditional second-order phase-locked loop (PLL). To address the contradiction between acquisition bandwidth and noise suppression capability of the traditional PLL, a new second-order PLL coupled with a nonlinear element is proposed. The proposed nonlinear second-order PLL regulates the loop noise bandwidth adaptively by the nonlinear module. When a large input–output phase error occurs, this PLL reduces the frequency offset quickly by taking advantage of the large bandwidth. When the phase error is reduced by the loop control, the proposed PLL suppresses noises by using the small bandwidth to increase the tracking accuracy. Simulation results demonstrate that the tracking speed of the proposed PLL is increased considerably, and its acquisition bandwidth is increased to 18.8 kHz compared with that of the traditional second-order PLL (4 kHz).

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33

Csaba, Béla, and Bálint Vásárhelyi. "On the Relation of Separability, Bandwidth and Embedding." Graphs and Combinatorics 35, no. 6 (September 9, 2019): 1541–53. http://dx.doi.org/10.1007/s00373-019-02086-3.

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Abstract In this paper we construct a class of bounded degree bipartite graphs with a small separator and large bandwidth, thereby showing that separability and bandwidth are not linearly equivalent. Furthermore, we also prove that graphs from this class are spanning subgraphs of graphs with minimum degree just slightly above n / 2, even though their bandwidth is large.

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34

YANG, HUI-MIN. "BANDWIDTH ENHANCEMENT IN CHAOTIC SEMICONDUCTOR LASERS WITH STRONG CHAOTIC OPTICAL INJECTION." Modern Physics Letters B 26, no. 12 (April 26, 2012): 1250073. http://dx.doi.org/10.1142/s021798491250073x.

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The bandwidth properties of chaotic signals generated by semiconductor lasers subject to strong chaotic optical injection (COI) are investigated numerically. The chaotic output of an injection master laser (ML) is injected into the slave laser (SL). The effects of feedback strength, injection strength and bias current on the bandwidth properties are discussed in detail. Some novel results are found, the bandwidth for SL increases with the injection strength firstly until reaches a maximum, and then decrease to approach the bandwidth of ML due to the injection-locking chaos synchronization. Large feedback strength and bias current contributes to higher maximum chaotic bandwidth in the range of injection strength. That is to say, for given parameters, optimal injection strength exists contributing to highest chaotic bandwidth, and moves to a large value for a large feedback strength and bias current, which is extremely useful for increasing the transmission rate of the optical chaotic communication system.

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35

Chen, Qiang, Hou Zhang, Lu-chun Yang, Bin-bin Li, and Xue-liang Min. "Wideband Inverted-L Microstrip-via-Fed Circularly Polarized Antenna with Asymmetrical Ground for WLAN/Wimax Applications." Frequenz 72, no. 7-8 (June 26, 2018): 333–41. http://dx.doi.org/10.1515/freq-2017-0075.

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Abstract A design with wideband and circularly polarized radiation antenna from an open-slot antenna has been demonstrated in this paper. The proposed antenna, which consists of an open slot and an inverted-L strip feeding, provides a large bandwidth, which completely cover the Wimax (3.3–3.8 GHz) and WLAN (2.4–2.48 GHz) bands. The open slot is formed by an modified ground plane with a slit cut and monofilar spiral stubs employed, which fed by an asymmetrical inverted-L strip feedline using a via. As demonstrated, the CP operation was significantly improved by loading monofilar spiral stubs connected to the asymmetric feedline by means of a via. A parametric study of the key parameters is made and the mechanism for circular polarization is described. After optimization, the impedance bandwidth is approximately 3.78 GHz (2.12 to 5.9 GHz) and the 3 dB axial ratio bandwidth is approximately 2.75 GHz (2.2 to 4.95 GHz), which represent fractional bandwidths of approximately 94.3 % and 76.9 %, respectively.

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36

Prat, Eduard, Marco Calvi, and Sven Reiche. "Generation of ultra-large-bandwidth X-ray free-electron-laser pulses with a transverse-gradient undulator." Journal of Synchrotron Radiation 23, no. 4 (May 13, 2016): 874–79. http://dx.doi.org/10.1107/s1600577516007177.

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Анотація:

A new and simple method to generate X-ray free-electron-laser radiation with unprecedented spectral bandwidth above the 10% level is presented. The broad bandwidth is achieved by sending a transversely tilted beam through a transverse-gradient undulator. The extent of the bandwidth can easily be controlled by variation of the beam tilt or the undulator gradient. Numerical simulations confirm the validity and feasibility of this method.

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37

MOSTAFA, HASSAN, HEWIDA MOHAMED, and A. M. SOLIMAN. "NOVEL FCS-BASED LAYOUT-FRIENDLY ACCURATE WIDE-BAND LOW-POWER CCII- REALIZATIONS." Journal of Circuits, Systems and Computers 19, no. 05 (August 2010): 997–1014. http://dx.doi.org/10.1142/s0218126610006566.

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This paper presents two novel Floating Current Source (FCS)-based CMOS negative second generation current conveyor (CCII-) realizations suitable for very large scale implementation. The proposed realizations provide high voltage and current tracking accuracy, as well as large voltage and current transfer bandwidths. Simulation results show that the first proposed wide-band CCII- bandwidth is about 972 MHz. Targeting low-power dissipation, a second low-power version of the wide-band CCII- is proposed at the expense of lower bandwidth and accuracy. The proposed CCII- realizations are layout-friendly because they can be easily fabricated in a systematic modular layout fashion. In addition, a fair comparison is held between the proposed realizations and the only FCS-based CCII- realizations in the literature to show the strength of the proposed circuits. The proposed two CCII- realizations show excellent immunity to process variations and transistor mismatch. In addition, they are insensitive to the temperature variations. Finally, two common CCII- applications are presented.

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38

Wu Rong, 吴蓉, 马岩岩 Ma Yanyan, and 李龙飞 Li Longfei. "Slow Light Transmission of Photonic Crystal Waveguide with Wide Bandwidth and Large Normalized Delay Bandwidth Product." Laser & Optoelectronics Progress 58, no. 7 (2021): 0723002. http://dx.doi.org/10.3788/lop202158.0723002.

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39

Cheng, Bo, Lei Wang, Yuxiao Zou, Longfeng Lv, Chuanchuan Li, Yun Xu, and Guofeng Song. "Large bandwidth and high-efficiency plasmonic quarter-wave plate." Optics Express 29, no. 11 (May 17, 2021): 16939. http://dx.doi.org/10.1364/oe.426006.

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40

Cheng, Rung-Shiang, and Hui-Tang Lin. "Modified TCP startup procedure for large bandwidth-delay networks." Journal of High Speed Networks 17, no. 1 (2008): 37–50. http://dx.doi.org/10.3233/jhs-2008-0330.

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41

NIE, Xiao-Feng, Ji-Wu JING, Yue-Wu WANG, and Ji XIANG. "Fluid-Based Large-Scale Bandwidth-Limited Worm Simulation Model." Journal of Software 22, no. 9 (September 14, 2011): 2166–81. http://dx.doi.org/10.3724/sp.j.1001.2011.03854.

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