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Journal articles on the topic 'High-performance transmission'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Hezel, U. B., E. Zellman, and D. Hoffmeister. "High-performance cryo transmission electron microscopy." Ultramicroscopy 17, no. 2 (January 1985): 174. http://dx.doi.org/10.1016/0304-3991(85)90043-9.

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2

Kawahara, Hideaki. "Power Transmission Belts for High Performance Engine." Journal of the Society of Mechanical Engineers 101, no. 952 (1998): 140–41. http://dx.doi.org/10.1299/jsmemag.101.952_140.

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3

Hua, Lei, Xinjun Sheng, and Xiangyang Zhu. "High-performance transmission mechanism for robotic applications." Mechanism and Machine Theory 105 (November 2016): 176–84. http://dx.doi.org/10.1016/j.mechmachtheory.2016.05.011.

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4

Fan, G. Y., Dana G. Dunkelberger, and Mark H. Ellisman. "High-performance transmission scintillating screen for TEM." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 404–5. http://dx.doi.org/10.1017/s0424820100169754.

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A scintillating screen is an indispensable component of a slow-scan CCD (charge-coupled-device) camera system for transmission electron microscopy. Its performance is therefore of great concern because of its influence on the overall performance of the system. Screens produced by deposition of phosphor on a thin metal foil appear to be attractive particularly for intermediateand high voltage applications. The metal foil serves three purposes: (1) support for the phosphor; (2) charge conductor; and (3) light reflector. Vacuum deposited, thin aluminum foils serve these purposes well. We report here briefly the brightness and resolution of a scintillating screen composed of a 10 μm layer of P20 phosphor deposited on 2 μm Al foil. More detailed characterization of the screen can be found elsewhere. Results are compared to that of a screen made by depositing a similar layer of phosphor onto a glass plate, and that of a 0.5 mm YAG screen.Fig. 1 illustrates schematically the structure of the aluminum screen.

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5

Dash, P. K. "High-performance controllers for HVDC transmission links." IEE Proceedings - Generation, Transmission and Distribution 141, no. 5 (1994): 422. http://dx.doi.org/10.1049/ip-gtd:19941238.

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6

Sewaiwar, Atul, Samrat Vikramaditya Tiwari, and Yeon Ho Chung. "Visible light communication-based high-speed high-performance multimedia transmission." International Journal of Information and Communication Technology 13, no. 3 (2018): 305. http://dx.doi.org/10.1504/ijict.2018.094319.

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7

Sewaiwar, Atul, Yeon Ho Chung, and Samrat Vikramaditya Tiwari. "Visible light communication-based high-speed high-performance multimedia transmission." International Journal of Information and Communication Technology 13, no. 3 (2018): 305. http://dx.doi.org/10.1504/ijict.2018.10012285.

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8

WANG, JIAXU, KE XIAO, MIN LI, and FENG TANG. "INNOVATION STUDY ON HIGH PERFORMANCE FILTER TRANSMISSION MECHANISM." Journal of Advanced Manufacturing Systems 07, no. 01 (June 2008): 157–60. http://dx.doi.org/10.1142/s0219686708001280.

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The paper mainly aims at the common problems existing in driving components, especially in harmonic reducer, RV reduction gear, etc. The paper put forward a new high performance filter transmission mechanism with high reliability, long life, large torque, small volume and lower weight, especially the innovation design method of high performance filter transmission mechanism. The new transmission mechanism is composed of eccentric sleeve, inner meshed planet gear pair of less teeth difference, filter spline pair, three ways thrust bearing and so on. Moreover, the paper has designed the eccentricity and tooth outline, made numerical simulation of the meshing process with pressure angle of 30, calculated the transmission efficiency, and checked the intensity of wheels. Furthermore, the paper has operated comprehensive tests about transmission precision, rigidity, backlash, and transmission efficiency.

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9

Marimuthu, C. N., and P. Thangaraj. "Transmission Gate based High Performance Low Power Multiplier." Journal of Applied Sciences 10, no. 23 (November 15, 2010): 3051–59. http://dx.doi.org/10.3923/jas.2010.3051.3059.

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10

Peltier, S., J. C. Bouwer, N.-H. Xuong, and M. H. Ellisman. "High Performance Digital Imaging for Transmission Electron Microscopy." Microscopy and Microanalysis 9, S02 (August 2003): 1566–67. http://dx.doi.org/10.1017/s1431927603447831.

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11

Zhang, Zhihao, Baiguo Zhang, and Xiaobo Zhang. "Performance Research of LoRa at High Transmission Rate." Journal of Physics: Conference Series 1544 (May 2020): 012177. http://dx.doi.org/10.1088/1742-6596/1544/1/012177.

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12

Dehon, André, and Thomas F. Knight. "High Performance, Point-to-Point, Transmission Line Signaling." VLSI Design 7, no. 1 (January 1, 1998): 111–29. http://dx.doi.org/10.1155/1998/84860.

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Inter-chip signaling latency and bandwidth can be key factors limiting the performance of large VLSI systems. We present a high performance, transmission line signaling scheme for point-to-point communications between VLSI components. In particular, we detail circuitry which allows a pad driver to sense the voltage level on the attached pad during signaling and adjust the drive impedance to match the external transmission line impedance. This allows clean, reflection-free signaling despite the wide range of variations common in IC device processing and interconnect fabrication. Further, we show how similar techniques can be used to adjust the arrival time of signals to allow high signaling bandwidth despite variations in interconnect delays.This scheme employed for high performance signaling is a specific embodiment of a more general technique. Conventional electronic systems must accommodate a range of system characteristics (e.g. delay, voltage, impedance). As a result, circuit designers traditionally build large operating margins into their circuits to guarantee proper operation across all possible ranges of these characteristics. These margins are generally added at the expense of performance. The alternative scheme exemplified here is to sample these system characteristics in the device's final operating environment and use this feedback to tune system operation around the observed characteristics. This tuning operation reduces the range of characteristics the system must accommodate, allowing increased performance. We briefly contrast this sampled, system-level feedback with the more conventional, fine-grained feedback employed on ICs (e.g. PLLs).

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13

Seidl, Rolf, and Daniel Pfaff. "Use of High-Performance Plastics for Transmission Components." ATZ worldwide 116, no. 4 (March 12, 2014): 20–23. http://dx.doi.org/10.1007/s38311-014-0161-8.

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14

Lazaropoulos, Athanasios G. "Broadband Transmission and Statistical Performance Properties of Overhead High-Voltage Transmission Networks." Journal of Computer Networks and Communications 2012 (2012): 1–16. http://dx.doi.org/10.1155/2012/875632.

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This paper considers broadband signal transmission and statistical performance properties of high-voltage/broadband over power lines (HV/BPL) channels associated with overhead power transmission. The overhead HV/BPL transmission channel is investigated with regard to its spectral behavior, its end-to-end signal attenuation, and its statistical performance metrics. It is found that the above features depend critically on the frequency, the overhead HV power grid type (150 kV, 275 kV, or 400 kV and single- or double-circuit), the coupling scheme applied, the physical properties of the cables used, the MTL configuration, and the type of branches existing along the end-to-end BPL signal propagation. The contribution of this paper is threefold. First, the significant broadband transmission potential of overhead HV lines is revealed. The results demonstrate that, regardless of overhead HV power grid type, the overhead HV grid is a potentially excellent communications medium, offering low-loss characteristics, flat-fading features, and low multipath dispersion over a 25 km repeater span well beyond 100 MHz. Second, regarding the statistical properties of various overhead HV/BPL transmission channels, two fundamental correlations of several wireline systems, for example, coaxial cables and xDSL, are also validated in the case of overhead HV/BPL transmission channels, namely, (i) end-to-end channel attenuation in relation with root-mean-square delay spread (RMS-DS) and (ii) coherence bandwidth (CB) in relation with RMS-DS. Third, fitting the numerical results and other field trial measurements, two regression distributions suitable for each fundamental correlation are proposed.

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15

Li, Peng, Zhigang Gao, Jun Zhou, and Jiaolong Zhang. "High Fidelity Modeling Method of High Performance Electromechanical Actuator." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 1 (February 2018): 7–12. http://dx.doi.org/10.1051/jnwpu/20183610007.

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The accuracy of high performance electromechanical actuator(EMA) system model has important influence on the simulation accuracy of aircraft guidance and control loop. Aiming at solving the deficiency in the reflection of EMA characteristics using traditional second-order model, a high-fidelity global coupling modular structure modeling method is proposed. Based on the analysis of the modeling process, high-fidelity modeling research is conducted on "BLDCM/ball screw/fork" type EMA systems. The structure of high fidelity model is investigated, and modeling methods of nonlinear factors such as servo motor, transmission ratio, mechanical inertia and transmission flexibility in the system are examined in detail. Simulation results based on simulink platform show that the high fidelity model established by this method is highly consistent with the actual system performance of the input-output characteristics and the internal state characteristics, ensuring the authenticity of the system model, which plays an important effect on improving the simulation accuracy of the aircraft guidance and control loop.

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16

Teng, Da, Kai Wang, Qiongsha Huan, Weiguang Chen, and Zhe Li. "High-performance light transmission based on graphene plasmonic waveguides." Journal of Materials Chemistry C 8, no. 20 (2020): 6832–38. http://dx.doi.org/10.1039/d0tc01125h.

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17

Ekonomou, Lambros, Ioannis F. Gonos, and Ioannis A. Stathopulos. "Lightning performance assessment of Hellenic high voltage transmission lines." Electric Power Systems Research 78, no. 4 (April 2008): 703–12. http://dx.doi.org/10.1016/j.epsr.2007.05.018.

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18

Shea, J. J. "Corona performance of high-voltage transmission lines [Book Review]." IEEE Electrical Insulation Magazine 20, no. 2 (March 2004): 54. http://dx.doi.org/10.1109/mei.2004.1283282.

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19

Cai, Tong, ShiWei Tang, GuangMing Wang, HeXiu Xu, ShuLin Sun, Qiong He, and Lei Zhou. "High-Performance Bifunctional Metasurfaces in Transmission and Reflection Geometries." Advanced Optical Materials 5, no. 2 (November 15, 2016): 1600506. http://dx.doi.org/10.1002/adom.201600506.

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20

Bai, Yecheng, and Kai Da Xu. "High-performance filtering power divider with multiple transmission zeros." Microwave and Optical Technology Letters 60, no. 11 (October 2, 2018): 2673–76. http://dx.doi.org/10.1002/mop.31468.

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21

Benninghoven, A. "High-performance time - of - flight SIMS." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 2 (August 1992): 1550–51. http://dx.doi.org/10.1017/s0424820100132388.

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Progress in many fields of science and technology strongly depends on the availability of appropriate analytical techniques. This becomes increasingly true for all surface related technologies. A most important analytical information concerns the chemical composition of the uppermost monolayers. This information should be supplied with high sensitivity and high resolution, not only for the elemental but also for the molecular surface composition.Time - of - Flight SIMS supplies this molecular information, which cannot be obtained by other surface analytical techniques as AES (Auger electron spectroscopy), XPS (photoelectron spectroscopy), electron microscopy or the electron microprobe. The extremely high transmission allows static SIMS surface analysis with high lateral and mass resolution. Depending on the primary ion source, lateral resolutions below 100 nm are achieved. The Time - of - Flight technique allows parallel acquisition of a large number of ion images. It features an unlimited mass range obtained with an ultimate sensitivity based upon the parallel mass registration and the high transmission.

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22

Mori, Hideharu, Tomohiro Higuchi, Nobuo Otsuka, and Minoru Terano. "High resolution transmission electron microscope observation of industrial high performance Ziegler catalysts." Macromolecular Chemistry and Physics 201, no. 18 (December 1, 2000): 2789–98. http://dx.doi.org/10.1002/1521-3935(20001201)201:18<2789::aid-macp2789>3.0.co;2-i.

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23

Jiang, Pan, Run Jing Zhou, and Jia Lu Zhou. "SFP + High-Speed Channel Performance Simulation and Measure." Applied Mechanics and Materials 719-720 (January 2015): 538–43. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.538.

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The 10Gbps high-speed serial interface has been used in data transmission widely. As the bandwidth demanding for high-speed communication network sharply increases, it is increasingly important to investigate the interconnection of high-speed serial interface. In this paper, the SFP+ interface signal integrity (SI) were analyzed with EM simulation and the lab measurement. The 2.5D and 3D modeling methodologies were introduced for the interest transmission line in the frequency domain. We measured its differential mode (DM) reflection and transmission coefficients, subsequently observed the variation of DM impedance and analyzed the causes of impedance discontinuity by the utilization of TDR measurement, and finally put forward several methods to improve the SI. It is notable that the simulation results of the 2.5D and 3D model are almost identical by comparison, which means that 2.5D modeling methodologies also can achieve high accuracy around 10Ghz. Additionally, we optimized the SI simulation results by varying the output voltage and pre-emphasis parameters. Finally, the SFP+ compliance test shows the simulation has good agreement with lab measurement in the time domain.

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24

Zhao, Zhong-Nan, Pei-Li Qiao, and Jian Wang. "A High Performance Target Tracing Transmission Model Oriented to Lifecycle Maximization." Journal of Sensors 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/5401923.

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For the high speed sensor networks applications such as Internet of Things, multimedia transmission, the realization of high-rate transmission under limited resources has become a problem to be solved. A high speed transmission and energy optimization model oriented to lifecycle maximization is proposed in this paper. Based on information-directed mechanism, the energy threshold set and the relay node distance selection will be done in the process of target tracing, as a result, retaining a balance between transmission rate and energy consumption. Meanwhile, multiagent coevolution is adopted to achieve the maximum of network lifecycle. Comparing with the relevant methods, indexes for network such as hops, throughput, and number of active nodes, standard deviation of remaining energy, and the network lifecycle are considered, and the simulated experiments show that the proposed method will promote the transmission rate effectively, prolong the network lifecycle, and improve network performance as a whole.

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25

O'Keefe, Michael A., John H. Turner, John A. Musante, Crispin J. D. Hetherington, A. G. Cullis, Bridget Carragher, Ron Jenkins, et al. "Laboratory Design for High-Performance Electron Microscopy." Microscopy Today 12, no. 3 (May 2004): 8–17. http://dx.doi.org/10.1017/s1551929500052093.

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Since publication of the classic text on the electron microscope laboratory by Anderson, the proliferation of microscopes with field emission guns, imaging filters and hardware spherical aberration correctors (giving higher spatial and energy resolution) has resulted in the need to construct special laboratories. As resolutions iinprovel transmission electron microscopes (TEMs) and scanning transmission electron microscopes (STEMs) become more sensitive to ambient conditions. State-of-the-art electron microscopes require state-of-the-art environments, and this means careful design and implementation of microscope sites, from the microscope room to the building that surrounds it. Laboratories have been constructed to house high-sensitive instruments with resolutions ranging down to sub-Angstrom levels; we present the various design philosophies used for some of these laboratories and our experiences with them. Four facilities are described: the National Center for Electron Microscopy OAM Laboratory at LBNL; the FEGTEM Facility at the University of Sheffield; the Center for Integrative Molecular Biosciences at TSRI; and the Advanced Microscopy Laboratory at ORNL.

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26

Zhang, Jiasen, Yongqi Bai, Qiang Wei, Liang Cao, Tao Wang, and Ziyi Ge. "Efficient bipolar AIE emitters for high-performance nondoped OLEDs." Journal of Materials Chemistry C 8, no. 34 (2020): 11771–77. http://dx.doi.org/10.1039/d0tc02566f.

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27

Bilinskis, Ivars, and Eugene Boole. "Signal Transmission and Representation Based on High Performance Event Timing." Baltic Journal of Modern Computing 5, no. 1 (2017): 24–36. http://dx.doi.org/10.22364/bjmc.2017.5.1.02.

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28

Kang, Min Woo, Il Kyu Eom, Seok Wun Ha, and Yong Ho Moon. "Advanced Data-Transmission Scheme for a High-Performance Mission Computer." Journal of Aerospace Information Systems 11, no. 5 (May 2014): 326–36. http://dx.doi.org/10.2514/1.i010130.

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29

宋, 凌云. "Audio Acquisition and Wireless Transmission for High-Performance Embedded Processors." Hans Journal of Wireless Communications 02, no. 04 (2012): 65–68. http://dx.doi.org/10.12677/hjwc.2012.24012.

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30

Pendock, G. J., and D. D. Sampson. "Transmission performance of high bit rate spectrum-sliced WDM systems." Journal of Lightwave Technology 14, no. 10 (1996): 2141–48. http://dx.doi.org/10.1109/50.541201.

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31

Takahashi, Hiroshi. "High performance planar lightwave circuit devices for large capacity transmission." Optics Express 19, no. 26 (November 17, 2011): B173. http://dx.doi.org/10.1364/oe.19.00b173.

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32

Saiki, Kohei, Yoshikazu Miyoshi, and Takeshi Watanabe. "Development of High Performance Transmission Gear with Small Teeth Number." Proceedings of the Symposium on Motion and Power Transmission 2004 (2004): 225–28. http://dx.doi.org/10.1299/jsmempt.2004.225.

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33

Hagishima, K., Y. Kobayashi, and K. Aida. "High-Speed CMI Optical Intraoffice Transmission System: Design and Performance." IEEE Journal on Selected Areas in Communications 4, no. 9 (December 1986): 1451–57. http://dx.doi.org/10.1109/jsac.1986.1146489.

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34

Ok, Gyeongsik, Kisang Park, Hyang Sook Chun, Hyun-Joo Chang, Nari Lee, and Sung-Wook Choi. "High-performance sub-terahertz transmission imaging system for food inspection." Biomedical Optics Express 6, no. 5 (April 29, 2015): 1929. http://dx.doi.org/10.1364/boe.6.001929.

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35

Huebner, Sebastian, Natsuki Miyakawa, Stefan Kapser, Andreas Pahlke, and Franz Kreupl. "High Performance X-Ray Transmission Windows Based on Graphenic Carbon." IEEE Transactions on Nuclear Science 62, no. 2 (April 2015): 588–93. http://dx.doi.org/10.1109/tns.2015.2396116.

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36

Müller, Jörg, Jens Liebold, and Christoph Danzer. "High-performance Hybrid Transmission for Future Plug-in Hybrid Drives." ATZ worldwide 118, no. 10 (September 27, 2016): 16–21. http://dx.doi.org/10.1007/s38311-016-0103-8.

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37

Fyodorov, A. A., A. L. Kholmetskii, M. V. Korzhik, A. R. Lopatik, M. Mashlan, and O. V. Misevich. "High-performance transmission Mössbauer spectroscopy with YAlO3:Ce scintillation detector." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 88, no. 4 (June 1994): 462–64. http://dx.doi.org/10.1016/0168-583x(94)95398-8.

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38

Rasmussen, Thomas Peter. "Compact and High Performance Spectrometers based on Novel Transmission Gratings with High Dispersion." Applied Spectroscopy 70, no. 5 (March 21, 2016): 804–9. http://dx.doi.org/10.1177/0003702816638271.

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39

Friskney, Brett, Mahdi Mohammadpour, Stephanos Theodossiades, Christopher Craig, and Greg Rapson. "Effects of transmission shaft flexibility on rolling element bearing tribodynamics in a high-performance transmission." Mechanism and Machine Theory 165 (November 2021): 104440. http://dx.doi.org/10.1016/j.mechmachtheory.2021.104440.

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40

Cheng, Xin, and Hua Chun Wu. "High-Performance Real-Time Bus in Parallel Processing System." Applied Mechanics and Materials 278-280 (January 2013): 1043–46. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1043.

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Rapid increases in the complexity of algorithms for real-time signal processing applications have made multi-processors parallel processing technology needed. This paper proposes a design of high-performance real-time bus (RTB), based on which distributed shared memory (DSM) mechanism is established to implement data exchange among multiple processors. Adopting DSM mechanism can reduce the software overhead and improve data processing performance significantly. Definition and implementation details of RTB and data transmission model are discussed. Experimental results show the stable data transmission bandwidth is achieved with performance not affected by the increasing number of processors.

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41

Abboud, Maryam K., and Bayan M. Sabbar. "Performance evaluation of high mobility OFDM channel estimation techniques." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (June 1, 2020): 2562. http://dx.doi.org/10.11591/ijece.v10i3.pp2562-2568.

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In wireless communication, Orthogonal Frequency Division Multiplexing (OFDM) has been adopted due to its robustness to multipath fading and high data rate transmissions. At the other hand, the performance of OFDM systems severely degraded due to multi-path fading and Doppler frequency shifts in mobile systems, which causes inter-carrier-interference (ICI). Thus, Estimation of channel parameters is required at the receiver using a pre designed estimator where pilot tones are inserted in each OFDM symbol. In this paper, a random pilot data are generated and inserted in each OFDM symbol at equally spaced locations. The performance test of Least Square (LS) and Linear Minimum Mean Square (LMMSE) estimation methods are proposed with Discrete Fourier Transform (DFT) based on both LS and LMMSE, where different ITU channel models are considered in order to compare their performance for data transmission in high mobile systems with different Doppler frequencies exceeds 200 Hz and minimal number of pilots.

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42

Sh. Wais, Dunya, and Wafaa S. Majeed. "PERFORMANCE OF HIGH VOLTAGE TRANSMISSION LINE BASED ON THYRISTOR-CONTROL SERIES COMPENSATOR." Journal of Engineering and Sustainable Development 25, no. 5 (May 1, 2021): 26–38. http://dx.doi.org/10.31272/jeasd.25.5.3.

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This research aims to improve the steady-state performance of high-voltage power transmission lines, which is a significant challenge for the power system grid's safe and reliable operation. The research adopted Flexible Alternating Current Transmission System for electronic devices. The flexible alternating current transmission system technology will be used in this specific work as Thyristor-Controlled Series Compensators. Thyristor-controlled series compensator devices increase transmission systems' capacity and enhance the voltage profile by regulating transmission line reactance. Gravitational Search Algorithm is a meta-heuristic approach applied to find the optimum size and optimal location of thyristor-controlled series compensators in power systems. The gravitational search algorithm is used to solve the multi-objective and integrated optimum power flow problem in reactive energy management during normal and contingency operations. The results showed reduced voltage deviation, reduced active/reactive power losses, and increased transmission line reserves above thermal limits, in addition to reducing the installed cost and number of thyristor series compensators devices. The simulation part was created with MATLAB programming language and validated with MATPOWER software. Applied to IEEE 30 bus system and 400kV super high voltage grid system.

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43

Li, Yongbei. "Improving the Performance of Power Transmission via Ultra High Voltage Direct Current (UHVDC)." MATEC Web of Conferences 173 (2018): 02028. http://dx.doi.org/10.1051/matecconf/201817302028.

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To meet people’s increasing demand for power, the power network system is developing. And the concept, essence and an energy interactive network plan of “Smart Grid” is proposed. However, some technical issues concerned in power network system appear. It is the key to improve the efficiency of transmission in the grid network. And the feasibility of applying Ultra High Voltage Direct Current (UHVDC) transmission to improve efficiency reliably is adequately expounded and proved. There are many countries using this method, especially China. Direct Current (DC) transmission is an important technology for high voltage, large capacity, and long distance transmission. Development and characteristics of UHVDC transmission and its development prospects in China are also introduced in this paper.

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44

Li, Chang Sheng, He Zhang, and Xiao Hua Jiang. "Experimental Research on the Influence of Transmission Parameters on the Transmission Performance of Magnetic Resonance Wireless Power Transmission Systems." Applied Mechanics and Materials 551 (May 2014): 393–98. http://dx.doi.org/10.4028/www.scientific.net/amm.551.393.

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Magnetic resonance wireless power transmission uses resonance strong coupling between the transmission and receiving terminals to realize a non-contact efficient supply of energy over large distance. The transmission power, efficiency and distance are confirmed by comprehensive function of the transmission parameters. By taking experimental means, the influence laws of loop transmission parameters, such as separation between coils, coil size, etc., on the transmission performance are studied in this paper. The experimental results show that the power high-efficiency and high-quality transmission does not depend on the large coil loop coupling coefficient and transmission power and efficiency may increase firstly and then decline as the separation between coils increases. The transmission performance can be optimized by increasing the coils diameter or wire diameter, and moreover, transmission systems with a high resonance frequency can produce high power and efficiency transmission over short distances.

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45

Li, Chang Sheng, Juan Cao, and He Zhang. "Theoretical Study on the Influence of Transmission Parameters on the Transmission Performance of Magnetic Resonance Wireless Power Transmission Systems." Advanced Materials Research 926-930 (May 2014): 434–39. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.434.

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Magnetic resonance wireless power transmission technology is based on the phenomenon of resonant coupling to realize non-contact power transmission via near magnetic field. Based on the mutual coupling model of resonance system, the influence laws of system transmission parameters, such as coil coupling coefficients, load resistance, etc., on the transmission performance are theoretically studied in this paper. The research results shows that the power high-efficiency and high-quality transmission does not depend on the large coil loop coupling coefficient and the working frequencies of maximum power and maximum efficiency transmission do not coincide at most condition. Transmission systems with a high resonance frequency can produce high power and efficiency transmission over short distances. In addition, by increasing the coil diameter or wire diameter can improve the system quality factor, and optimize the energy transmission performance.

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46

Chen, Chao, and Jorge Angeles. "Optimum Kinetimatics Design of Drives for Wheeled Mobile Robots Based on Cam-Roller Pairs." Journal of Mechanical Design 129, no. 1 (August 2, 2006): 7–16. http://dx.doi.org/10.1115/1.2359476.

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This paper proposes innovative drives for omnidirectional and quasi-omni-directional wheeled mobile robots. A novel epicyclic cam transmission is developed to transmit motion in the drives, with some advantages over its gear-train counterparts: low friction, high stiffness, and high precision. In this work, three new indices, the contact ratio in cam transmissions, the generalized transmission index, and the total transmission index, are proposed to evaluate the force and motion transmission qualities. Furthermore, the first two indices are the objective functions of the design of the dual-wheel transmission, the final design thus achieving the best transmission performance. The reported drives have been virtually prototyped.

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47

Cui, Xin, Qin Fei Ke, and Guang Ming Cai. "Evaluation of Light Protective Properties of High Performance Aramid Fabrics." Applied Mechanics and Materials 551 (May 2014): 28–31. http://dx.doi.org/10.4028/www.scientific.net/amm.551.28.

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The aramid fabrics have been widely used in aerospace, military and protective clothes for light radiation stability properties. The reflection and transmission properties of two kinds of materials (Kevlar 49 fabric and Kevlar 49/Nomex blended fabric) and three weaves of aramid fabrics with different wavelength spectrum were evaluated by ultraviolet-visible-near infrared (UV–Vis–NIR) spectrophotometer analysis. The effects of fabric layers on the reflection and transmission performances of aramid fabric were also discussed. It indicated that the aramid fabrics have good thermal and light protective properties.

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48

Liu, Wenbing, Lirong Huang, Jifei Ding, Chenkai Xie, Yi Luo, and Wei Hong. "High-Performance Asymmetric Optical Transmission Based on a Dielectric–Metal Metasurface." Nanomaterials 11, no. 9 (September 16, 2021): 2410. http://dx.doi.org/10.3390/nano11092410.

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Asymmetric optical transmission plays a key role in many optical systems. In this work, we propose and numerically demonstrate a dielectric–metal metasurface that can achieve high-performance asymmetric transmission for linearly polarized light in the near-infrared region. Most notably, it supports a forward transmittance peak (with a transmittance of 0.70) and a backward transmittance dip (with a transmittance of 0.07) at the same wavelength of 922 nm, which significantly enhances operation bandwidth and the contrast ratio between forward and backward transmittances. Mechanism analyses reveal that the forward transmittance peak is caused by the unidirectional excitation of surface plasmon polaritons and the first Kerker condition, whereas the backward transmittance dip is due to reflection from the metal film and a strong toroidal dipole response. Our work provides an alternative and simple way to obtain high-performance asymmetric transmission devices.

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49

Liu, Yang, Lei Liu, Jiacheng Liang, Jin Chai, Xuemei Lei, and Hui Zhang. "High-Performance Long Range-Based Medium Access Control Layer Protocol." Electronics 9, no. 8 (August 7, 2020): 1273. http://dx.doi.org/10.3390/electronics9081273.

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Long Range (LoRa) has become one of the most promising physical layer technologies for the Internet of Things (IoT) ecosystem. Although it manifests low-power consumption and long-distance communication, LoRa encounters a large number of collisions in the IoT environment, which severely affects the system’s throughput and delay performance. In this paper, a code division carrier sense multiple access (CD/CSMA) protocol that resolves the traditional channel collision problem and implements multi-channel transmission is proposed for the LoRa medium access control (MAC) layer. To reduce data transmission delay and maximize the throughput of the system, the adaptive p-persistent CSMA protocol divides the channel load into four states and dynamically adjusts the data transmission probability. Then, to reduce channel collisions significantly, the code division multiple access (CDMA) protocol is performed on different channel states. Moreover, the combination of the proposed adaptive p-persistent CSMA protocol and the CDMA successfully reduces the number of data retransmissions and makes LoRa more stable. The simulation results demonstrate that the proposed adaptive p-persistent CD/CSMA protocol can achieve near-optimal and occasionally even better performance than some conventional MAC protocols, especially in a heavy load channel.

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50

Alatwi, Aadel M., Ahmed Nabih Zaki Rashed, and Ismail A. Abd El Aziz. "High speed modulated wavelength division optical fiber transmission systems performance signature." TELKOMNIKA (Telecommunication Computing Electronics and Control) 19, no. 2 (April 1, 2021): 380. http://dx.doi.org/10.12928/telkomnika.v19i2.16871.

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