Propagation of optical vortices in an add-drop resonator based on a vertical array of ring resonators by B.P. Lapin, E.V. Barshak, M.A. Yavorsky, C.N. Alexeyev

“…It is shown that the OV transmission curves have a characteristic structure that we explain by the manifestation of the band structure of an infinite stack of coupled ring resonators. …”
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5G large-scale array antenna technology development and innovation direction by Shengjun LUO, Shenke ZHANG

“…In view of the current system architecture and technical solutions of 5G large-scale antennas,new technological developments and innovation directions were proposed,including low profile and light weight radiation element,high precision amplitude and phase calibration networks,all-in-one dense radiation arrays,and highly integrated antenna without reflection,antenna integrated filter,antenna and filter common module,mechanical phase shift and digital shaping combined,5G dual-band antenna,4G ＆amp; 5G intelligent antenna,etc.For each technological innovation direction,an overview and useful description were given.…”
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Look-up table predistorter based on non-iterative algorithm and indirect learning architecture for TWTA by WANG Yong1, XIANG Xin1, 2

“…Simulation results show that the predistorter can reduce in-band distortion and spectrum regrowth greatly introduced by the nonlinear effects of TWTA.…”
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Underwater laser communication with sloped pulse modulation in turbid water by Taewoong Kang, Kiman Kim, Serim Kim, Donghun Lee

“…In this article, we propose the demonstration of an underwater wireless laser communication link operating at data rates of up to 100 Mbps over a band-limited turbid water channel using a modified pulse position modulation scheme with a sloped pulse. …”
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Coordinate transformation based coefficients estimation algorithm for digital predistortion of RF power amplifiers by GHao HUAN, Hua QIAN, Sai-jie YAO, Xiu-mei YANG

“…Based on the low-IF digital predistortion (DPD) architecture,a coordinate transformation based low-complex coefficients estimation algorithm is proposed to reduce the hardware implementation cost and numerical calculation complexity significantly.The proposed algorithm transforms the complex multiplication of the conventional DPD coefficients estimation method to amplitude multiplication and phase addition in polar coordinates.To complete the same calculation,times of multiplications and accumulations are reduced by 75% and 50%.The algorithm is derived from the general Volterra pass-band nonlinear model,and proves the equivalency of baseband predistortion and IF predistortion.The proposed low-IF architecture and the coefficients estimation algorithm are verified by the measurement results on a practical radio frequency power amplifier.…”
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A Reconfigurable Coplanar Waveguide Bowtie Antenna Using an Integrated Ferroelectric Thin-Film Varactor by K. C. Pan, D. Brown, G. Subramanyam, R. Penno, H. Jiang, C. H. Zhang, M. Patterson, D. Kuhl, K. Leedy, C. Cerny

“…Reconfiguration of the compact 8 mm × 8 mm system has been demonstrated by shifting the antenna system’s operating frequency 500 MHz in the 7–9 GHz band by applying a DC voltage bias.…”
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Optimal Design of Diversion Piers of Lateral Intake Pumping Station Based on Orthogonal Test by Jiren Zhou, Miaomiao Zhao, Chuan Wang, Zhenjun Gao

“…Combined with numerical simulation, a better rectification scheme is provided, and finally, a reasonable range of values for the rectification parameters of the forebay diversion pier of the side 45° bend angle pump station is obtained.…”
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Link-first based quick coordinated virtual network embedding algorithm by Wen-cheng XIONG, Ying WANG, Xue-song QIU, Wen-jing LI

“…The algorithm embeds link and node alternately, and embeds the virtual link that with greater band-width requirement first to the physical path that with fewer link hops by using the greedy method, and ultimately aims at re-ducing average costs of virtual network embedding and improving acceptance rate of virtual network. …”
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Ultra-Wideband Indoor Channel Modelling Using Ray-Tracing Software for through-the-Wall Imaging Radar by Christophe Lièbe, Pierre Combeau, Alain Gaugue, Yannis Pousset, Lilian Aveneau, Rodolphe Vauzelle, Jean-Marc Ogier

“…This simulator allows to obtain temporal channel response to a wide-band emitter (3 GHz to 10 GHz). An experimental method is also described to identify the propagation paths. …”
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RESEARCH ON VEHICLE COMPONENTS’DAMAGE CORRELATION MODEL OF USER ROAD AND TEST FIELD BASED ON LOAD FREQUENCY by ZHENG SongLin, DAI Lei, ZHAO LiHui, HUANG ChongWen, YU JiaWei

“…Through calculating the damage of each frequency band of load data,the corresponding test field feature matrix and user road target matrix are established,the equivalent load spectrum and damage model are compared,and a kind of damage model based on load frequency is set up. …”
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Transosseous Tie Fixation Using Krackow Sutures and Bone Tunnels in a Comminuted Fracture of the Upper Pole of the Patella: A Case Report by Jong Seok Baik

“…Conventional methods such as tension-band wiring are not enough to gain proper fixation strength. …”
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Experimental Investigation for Fault Diagnosis Based on a Hybrid Approach Using Wavelet Packet and Support Vector Classification by Pengfei Li, Yongying Jiang, Jiawei Xiang

“…The wavelet packet is employed to decompose the vibration signal to obtain the energy ratio in each frequency band. Taking energy ratios as feature vectors, the pattern recognition results are obtained by the SVC. …”
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Research of Multi- Objective Optimization Design for Car Main Reduction Gear based on Response Surface Method by Zhou Dan

“…The main reducing gear parameter optimization are carried out by using the NSGA- Ⅱ multi- objective optimization genetic algorithm in which the tooth root bending stress,tooth surface contact stress and volume of the gears are defined as objective function,the solution set of the gears parameters are obtained. …”
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Correlation Coefficient of Simplified Neutrosophic Sets for Bearing Fault Diagnosis by Lilian Shi

“…Wavelet packet is applied to decompose the vibration signals into eight subfrequency bands, and the eigenvectors associated with energy eigenvalue of each frequency are extracted for fault features. …”
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RESEARCH ON STRAIGHTENING METHOD OF STEPPED PIPE by GAO Feng, ZHOU ZeWei, WANG Long, GUO ZhengLu, LI Yan

“…The three-point bending pressure straightening method is employed to deal with the problem of single curvature bent stepped pipe. …”
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A Ti/Ti-Based-Metallic-Glass Interpenetrating Phase Composite with Remarkable Mutual Reinforcement Effect by J. Mu, Z. W. Zhu, H. F. Zhang, H. W. Zhang, H. M. Fu, H. Li, A. M. Wang, Z. Q. Hu

“…Porous Ti limits the shear band (SB) propagation and promotes the SB multiplication, leading to the improved ductility. …”
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Effects of Aluminum on Hydrogen Solubility and Diffusion in Deformed Fe-Mn Alloys by C. Hüter, S. Dang, X. Zhang, A. Glensk, R. Spatschek

“…Therefore, we apply the climbing image nudged elastic band method to compute the minimum energy paths and energy barriers for hydrogen diffusion. …”
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Research of the Meshing Characteristic of Bi-directional Arc Cylindrical Gear by Tian Deyun, Song Aiping, Zhang Yihan, Shen Yuhan

“…A new type of gear bi- directional arc cylindrical gear is proposed,the tooth trace of the gear is arc,the bending resistance strength of the gear can be increased and the axial force of the gear transmission can be eliminated. …”
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Analysis of Transmission Characteristic of Straight Bevel Gear and Zero Spiral Bevel Gear by Li Duo, Hu Yumei

“…According to the simulation results,the gear contact force,tooth surface contact stress,tooth root bending stress and vibration of large gear are compared and analyzed. …”
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VARIANTS FOR EVALUATING THE RIGIDITY OF FLAT RING FLANGES by RADU I. IATAN, GHEORGHITA TOMESCU, MELANIA CORLECIUC (MITUCA), GEORGETA ROMAN (URSE), NICOLETA SPOREA, IULIANA- MARLENA PRODEA, IOLANDA CONSTANTA PANAIT

“…Based on the theory of the compatibility of deformations (radial displacements and rotations), the mathematical expressions necessary for the evaluation of the unitary radial bending moments and the unitary shearing forces of connection are established. …”
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