Second-harmonic generation within a random fiber laser by Yousi Yang, Dan Li, Pei Li, Guohao Fu, Tiancheng Qi, Yijie Zhang, Ping Yan, Mali Gong, Qirong Xiao

“…The conversion needs no pretreatment and the average second-harmonic (SH) power reaches up to 10.06 mW, with a corresponding conversion efficiency greater than 0.04%. …”
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Creating multibeam interference from two-beam interference with the assistance of harmonics generation by Wu-Zhen Li, Zhi-Yuan Zhou, Li Chen, Yin-Hai Li, Guang-Can Guo, Bao-Sen Shi

“…Here, we propose and experimentally verify a nonlinear optics-based MBI principle with the assistance of cascading and recycling harmonics generation of two-beam interference. By cascading and recycling the harmonics processes, in combining with optical power amplification (OPA) to compensate for power losses arising from limited nonlinear conversion efficiency, a total 16th harmonic is achieved, and the observed interference fringes gradually evolve from a sinusoidal curve to a Lorentz-like curve. …”
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Predicting Harmonic Distortion of Multiple Converters in a Power System by P. M. Ivry, O. A. Oke, D. W. P. Thomas, M. Sumner

“…The Univariate Dimension Reduction (UDR) method was utilized in this study as an efficient predictive tool for the level of harmonic distortion of the VSCs measured at the Point of Common Coupling (PCC) to the grid. …”
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Dynamic Analysis of Percussion Drilling System under Harmonic Impact by Yijin Zeng, Shidong Ding, Jinchao Xu, Qunai Hu, Xiaojie Cui

“…As a new efficient rock-breaking technology, harmonic impact drilling technology has received great attention, but the research on its rock-breaking mechanism is insufficient, which limits its development. …”
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EUROPEAN TAX SYSTEM: PROBLEMS OF HARMONIZATION AND WAYS TO SOLVE THEM by Anatolii O. Zadoia

“…taxes, improving the taxation of digital companies. Although the harmonization of tax systems in the EU is difficult due to the economic, political and social differences between the member states, gradual steps towards the convergence of tax rules and the fight against tax competition can ensure a more efficient functioning of the single market. …”
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Broadband flexible rectifier with harmonic suppression network for wireless power transfer by Wenxiong Peng, Chenchen Zhang, Huaiqing Zhang, Jiazheng Yu, Wei Song

“…This paper introduces a broadband flexible rectifier that employs a Class-F harmonic suppression network (HSN), designed for efficient long-distance wireless power transfer in applications such as solar power stations, wireless sensor networks, and unmanned aerial vehicles. …”
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Broadband Microwave Photonic Sub-Harmonic Downconverter with Phase Shifting Ability by Jinglan Zhang, Erwin Hoi Wing Chan, Xudong Wang, Xinhuan Feng, Bai Guan

“…A microwave photonic signal processor that is capable of simultaneously realizing sub-harmonic frequency down conversion and IF signal phase shifting operation is presented. …”
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Thermal effects due to harmonics on dry-type transformers: Impact of filters and phase angles by Mateus Caruso Costa, Marcio Zamboti Fortes, Guilherme Gonçalves Sotelo, Bruno Wanderley França

“…One notable issue is the generation of harmonic distortions by power electronics converters, which significantly affect the performance and efficiency of power transformers, leading to overheating and related adverse effects. …”
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Opposition-Based Quantum Bat Algorithm to Eliminate Lower-Order Harmonics of Multilevel Inverters by Jahedul Islam, Sheikh Tanzim Meraj, Ammar Masaoud, Md. Apel Mahmud, Amril Nazir, Muhammad Ashad Kabir, Md. Moinul Hossain, Farhan Mumtaz

“…It has advanced learning ability that can effectively remove lower-order harmonics from the output voltage of MLI. It can eventually increase the quality of the output voltage along with the efficiency of the MLI. …”
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Evaluation of power factor, harmonic content, and standby consumption in smart lamps by Eduardo Lourenço de Sousa, Marcio Zamboti Fortes, Bruno Gavinho Serdeira, Carlos Henrique Pereira da Silva da Costa Cardoso, Alexia Ellen Felismino da Silva

“…Even though LED technology is more efficient than older technologies, it has issues with poor power quality. …”
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Characterization of the Second Harmonic Generation of Boron Nitride Nanotube Macroscopic Assemblies by Ping Lu, Jingwen Guan, Cyril Hnatovsky, Huimin Ding, Kasthuri De Silva, Liliana Gaburici, Christopher Kingston, Stephen J. Mihailov

“…In this work, second harmonic generation (SHG) was achieved from free-standing bulk BNNT sheets and BNNT coatings on silica substrates. …”
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A Cost-Effective and High-Efficiency Novel 15-Level Hybrid MLI Topology for Renewable Energy Systems by Murat Karakılıç, Hasan Hataş

“…In tests with inductive loads, the output is near pure sinusoidal waveform. The total harmonic distortion (THD) is measured as 1.41% with a low inductive load of 50Ω + 25mH. …”
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Terahertz harmonic generation and nonlinear spectroscopy of metamaterial-gated/graphene resonators by Riccardo Degl’Innocenti, Yuezhen Lu, Abdullah M. Zaman, Jack M. Woolley, Nishtha Chopra, Wadood Tadbier, Wladislaw Michailow, Stephan Hofmann, James Lloyd-Hughes

“…The odd and even harmonic features show a positive correlation with carrier concentration, allowing for efficient frequency tuning on top of tunable group delay dispersion. …”
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Accurate Radar-Based Heartbeat Measurement Using Higher Harmonic Components by Itsuki Iwata, Kimitaka Sumi, Yuji Tanaka, Takuya Sakamoto

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Deterministic nanoantenna array design for stable plasmon-enhanced harmonic generation by Jeong Tae-In, Oh Dong Kyo, Kim San, Park Jongkyoon, Kim Yeseul, Mun Jungho, Kim Kyujung, Chew Soo Hoon, Rho Junsuk, Kim Seungchul

“…Plasmonic nanoantennas have been extensively explored to boost nonlinear optical processes due to their capabilities to confine optical fields on the nanoscale. In harmonic generation, nanoantenna array architectures are often employed to increase the number of emitters in order to efficiently enhance the harmonic emission. …”
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Dual-Band Rectifier Design With High Efficiency Using Simple Dual Band-Stop Network for Wireless Power Transfer by Dang-An Nguyen, Yujin Choi, Chulhun Seo

“…The proposed circuit employs a simple dual band-stop network cascaded by only two transmission lines (TLINs) which can yield open-circuit termination simultaneously for the second harmonics of both two separate frequency bands, enabling an efficient DB power recycling mechanism with minimum insertion loss for power conversion efficiency (PCE) enhancement. …”
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Harnessing greylag goose optimization for efficient MPPT and seven-level inverter in renewable energy systems by K. Rajaram, R. Kannan

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Comparison of Two Fourier-Based Methods for Simulating Inlet Distortion Unsteady Flows in Transonic Compressors by Lei Wu, Pengcheng Du, Fangfei Ning

“…Near the stall point, more harmonics for inlet distortion are necessary in TSC simulation to accurately capture flow separation. …”
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Reduction of Current Harmonics in BLDC Motors Using the Proposed Sigmoid Trapezoidal Current Hysteresis Control by Anuradha Thangavelu, Jebarani Evangeline Stephen, Srithar Samidurai, Ranganayaki Velusamy, Selligoundanur Subramaniyam Sivaraju, Subramaniam Usha, Sivakumar Palaniswamy

“…However, one major challenge in BLDC motors is the presence of current harmonics, which can lead to increased noise, vibration, and reduced efficiency, particularly at low speeds or light loads. …”
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New Approach for Voltage Drop Estimation in the Busbars of Workshop Networks at Higher Current Harmonics Influence by Kotsur M.I., Yarymbash D.S., Bezverkhnya Yu.S., Kotsur I.M.

“…The presence of higher current harmonics has a negative impact on the efficiency and reliability of the elements of network. …”
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