Tailoring beam profile and OAM spectrum in domain-engineered nonlinear photonic crystals by Xinyu Zhang, Hangyu Li, Shiqiang Liu, Yan Chen, Zhihan Zhu, Hui Liu, Shining Zhu, Xiaopeng Hu

“…Angular and radial phase modulations were introduced into the modulation function of the second-order nonlinear coefficient distribution of lithium tantalate nonlinear photonic crystals, achieving simultaneous tailoring of the OAM spectrum and the radial intensity profile of the second harmonic (SH) waves. As a representative example, we demonstrate the generation of a SH wave that carries a comb-like OAM spectrum, with the radial intensity distribution concentrating on a ring with a specific radius. …”
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Recent Developments on Hybrid Time-Frequency Numerical Simulation Techniques for RF and Microwave Applications by Jorge F. Oliveira, José C. Pedro

“…With these techniques, the aperiodic information dimension is treated in the discrete time domain, while the periodic carrier dimension is processed in the frequency domain, in which the solution is evaluated within a space of harmonically related sinusoidal functions. The objective of this paper is thus to provide a general overview on the most important hybrid time-frequency techniques, as the ones found in commercial tools or the ones recently published in the literature.…”
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Calculation of RMS Current Load on DC-Link Capacitors for Multiphase Machine Drives under Carrier-Phase Shift Control by Zhigang Zhang, Pengcheng Zhang, Yang Zhang, Wenjuan Zhang, Mengdi Li, Zichen Xiong

“…Meanwhile, the modulation ratio, harmonic sidebands, and switching frequency are also considered. …”
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Molecular Modeling and Spectroscopic Studies of Benzothiazole by V. Sathyanarayanmoorthi, R. Karunathan, V. Kannappan

“…The equilibrium geometry, bonding features, and harmonic vibrational frequencies have been investigated by ab initio and density functional theory (DFT) methods. …”
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Noninvasive Load Identification Method Based on Feature Similarity by Hongyan Li, Xianfeng Ding, Dan Qu, Jiang Lin

“…Secondly, the transient and steady-state characteristics of electrical equipment (active power and reactive power, harmonic current, and voltage-current trajectory) are extracted, and the feature database for the equipment is established. …”
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Effects of Contraction Joints on Vibrational Characteristics of Arch Dams: Experimental Study by S. S. Wang, Y. F. Zhang, M. S. Cao, W. Xu

“…When a scale model vibrates harmonically at a specific frequency, its operating deflection shape is acquired by using a scanning laser vibrometer to scan the side surface of the model. …”
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The social ideal of “Datong”: ancient China social utopia, or modern foresight project by M. Yu. Zakharov

“…To solve modern grand socio-economic tasks, China needs not only a human being with a more perfect nature and good historical memory, but also the society potential in which all heterogeneous forces will be harmonically united. The results of the study extend the field of knowledge about Chinese culture for Russian audience.…”
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INVESTIGATION OF THE ANHARMONIC CORRELATION EFFECTS BY DEBYE MODEL IN X-RAY ABSORPTION FINE STRUCTURE SPECTRA–APPLICATION TO A TWO-COMPONENT ALLOY by Nguyễn Bá Đức, Vũ Quang Thọ, Trịnh Phi Hiệp, Nguyễn Văn Nghĩa, Phạm Thị Minh Hạnh, Vũ Thị Thanh Hà

“…The anharmonic correlated Debye model and the harmonic Debye model have been used to build analytical expressions of mean square displacement, mean square relative displacement, and correlation function dependence on temperature and doping ratio. …”
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Performance of Variable Negative Stiffness MRE Vibration Isolation System by Run-pu Li, Cheng-bin Du, Fei Guo, Guo-jun Yu, Xiao-guo Lin

“…Its vibration response under simple harmonic excitation at small amplitude and the impact of the volume fraction of soft magnetic particles on the isolation system are also analyzed. …”
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Nonlinear Vibrational Analysis of Nanobeams Embedded in an Elastic Medium including Surface Stress Effects by S. Azizi, B. Safaei, A. M. Fattahi, M. Tekere

“…To this end, a thin surface layer is assumed on the upper and lower surfaces of the cross section to separate the surface and bulk of nanobeams with their own different material properties. Based on harmonic balance method, closed-form analytical solution is conducted for nonlinear vibrations to obtain natural frequencies of embedded nanobeams with and without considerations of surface elasticity and residual surface tension effects corresponding to the various values of nondimensional amplitude, elastic foundation modulus, and geometrical variables of the system. …”
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Photoacoustic Measurement of Ethane with Near-Infrared DFB Diode Laser by Gang Cheng, Yuan Cao, Kun Liu, Gongdong Zhu, Guishi Wang, Xiaoming Gao

“…Wavelength modulation and second harmonic detection scheme were employed. Modulation frequency and modulation amplitude were optimized for getting optimum performance. …”
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A Numerical Method for Analyzing Electromagnetic Scattering Properties of a Moving Conducting Object by Lei Kuang, Shouzheng Zhu, Jianjun Gao, Zhengqi Zheng, Danan Dong

“…An improved technique is proposed to solve the scattered field in order to improve the computational efficiency and stability of solutions. The time-harmonic scattered field from a one-dimensional moving conducting surface is first simulated by the proposed approach. …”
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Current Ripple Reduction Employing the Reactor of DC–DC Converter to Have Variable Inductance through Magnetic Saturation by Chang-Ho Lee, Tuan-Vu Le, Feel-soon Kang, Sung-Jun Park

“…When DC distribution grids with different voltage levels are connected, harmonic currents flow into the grid under light load conditions, which is a significant cause of grid instability. …”
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An Exact Analytical Solution to Exponentially Tapered Piezoelectric Energy Harvester by H. Salmani, G. H. Rahimi, S. A. Hosseini Kordkheili

“…The mass normalized mode shapes of the exponentially tapered piezoelectric beam with tip mass are implemented to transfer the proposed electromechanical coupled equations into modal coordinates. The steady states harmonic solution results are verified both numerically and experimentally. …”
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Low-Frequency Broadband Sound Transmission Loss of Infinite Orthogonally Rib-Stiffened Sandwich Structure with Periodic Subwavelength Arrays of Shunted Piezoelectric Patches by Zhifu Zhang, Weiguang Zheng, Qibai Huang

“…Second, we take into account all inertia terms of the rib-stiffeners to establish the governing equations by space harmonic method, separating the amplitude coefficients of the equivalent facesheets through virtual work principle. …”
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Analytic Model for Conduction Current in AlGaN/GaN HFETs/HEMTs by Danqiong Hou, Griff L. Bilbro, Robert J. Trew

“…We have developed a new, zone-based compact physics-based AlGaN/GaN heterojunction field-effect transistor (HFET) model suitable for use in commercial harmonic-balance microwave circuit simulators. The new model is programmed in Verilog-A, an industry-standard compact modeling language. …”
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Experimental Investigation on the Friction-Induced Vibration with Periodic Characteristics in a Running-In Process under Lubrication by Di Sun, Pengfei Xing, Guobin Li, Hongtao Gao, Sifan Yang, Honglin Gao, Hongpeng Zhang

“…The FIV signal with periodic characteristics under lubrication was identified with the help of the squeal signal induced in an oil-free wear experiment and then extracted by the harmonic wavelet packet transform (HWPT). The variation of the FIV signal from running-in wear stage to steady wear stage was studied by its root mean square (RMS) values. …”
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Analysis of Eccentricity-Based Topological Invariants with Zero-Divisor Graphs by Zhi-hao Hui, Abdul Rauf, Muhammad Mohsin Abbas, Adnan Aslam

“…In this paper, we have computed some eccentricity based topological indices of JR, namely, atom-bond connectivity index (ABC5), eccentricity-based harmonic index of fourth type (H4J), geometric-arithmetic eccentricity index (GA4J), eccentricity-based third Zagreb index, and eccentricity-based first Zagreb index.…”
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Is a viable hemp industry in Florida’s future? by Trent Blare, Martha Rivera, Fredy H. Ballen, Zachary Brym

“…Better coordination between regulators, processors, financial institutions, research and Extension services, and the retail sector to build confidence, harmonize policies, and lower transaction costs would help the industry flourish and ensure growers, consumers, and hemp-related enterprises can benefit from this emerging market. …”
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Phytophthora Root Rot on Southern Highbush Blueberry in Florida by Norma C. Flor, Douglas A. Phillips, Philip F. Harmon

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