Research on the Resonance Characteristics of Rock under Harmonic Excitation by Siqi Li, Shenglei Tian, Wei Li, Tie Yan, Fuqing Bi

“…The second one is a multi-DOF model based on the principle of least action. Subsequently, the modal characteristics, as well as the influence of excitation frequency, the mechanical properties, and dimensions of the rock on its resonance frequency, are analyzed by using FEM. …”
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Nonlinear Seepage Model of Gas Transport in Multiscale Shale Gas Reservoirs and Productivity Analysis of Fractured Well by Ting Huang, Xiao Guo, Kun Wang

“…By using the conformal transformation principle and pressure coupling method, we established the productivity formula of fractured well (infinite and limited conductivity) satisfying mass variable seepage flowing in fractures. …”
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Activities of the Armed Forces of Latvia, Lithuania and Estonia: Experience for Ukraine by V. V. Chumak

“…It is stated that the activities of the Armed Forces of the Baltic States are carried out on the principle of collective defence of the North Atlantic Treaty Organization, which task is to protect the member States from military threat. …”
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Modeling and Control of the Public Opinion: An Agree-Disagree Opinion Model by Sara Bidah, Omar Zakary, Mostafa Rachik

“…We prove the existence of solutions to the control problem, we employ Pontryagin’s maximum principle to find the necessary conditions for the existence of the optimal controls, and Runge–Kutta forward-backward sweep numerical approximation method is used to solve the optimal control system, and we perform numerical simulations using various initial conditions and parameters to investigate several scenarios. …”
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Research on mechanical analysis and optimal design of electromagnetic variable pre-pressure ultrasonic motor by Ruikun Niu, Yong Guo, Guanqi Wu, Jun Liu

“…However, their working principle relies on contact friction drive, and the magnitude of the applied pre-pressure directly affects their performance output. …”
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CITIZENSHIP AND INDIGENOUS CHALLENGES IN NIGERIA: DRAWING INSIGHTS FROM BEST PRACTICES IN THE UNITED STATES by AUWALU MUSA

“…The study utilizes secondary data and content analysis to explore the complex interplay of belonging, rights, and identity in American citizenship, highlighting the role of birthright citizenship as stipulated by the 14th Amendment. This U.S. principle, prioritizing birthplace over lineage, contrasts with the descent-based approaches prevalent in Nigeria and some other countries. …”
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Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition by Xiaofei Du, Dacheng Huang, Jianrun Zhang

“…In this paper, a semianalytical model of the sandwich-truncated ABH beam structure with aluminum in the middle layer and steel in the upper and lower layers is constructed based on the energy principle. The ABH effect of the sandwich beam under the clamped-free boundary condition is analyzed. …”
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Design of Heat Exchanger for Ericsson-Brayton Piston Engine by Peter Durcansky, Stefan Papucik, Jozef Jandacka, Michal Holubcik, Radovan Nosek

“…The paper deals with the principle of hot-air engines, and their use in combined heat and electricity production from biomass and with heat exchangers as primary energy transforming element.…”
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PENANGANAN JERAWAT SINDROM AKUMULASI DAHAK MENGGUNAKAN AKUPUNTUR DAN HERBAL JIANGHUANG by Dyah Agesti, Suryani Dyah Astuti, Arifa Mustika

“…Methods: Acupuncture therapy at LI-4 Hegu, ST-36 Zusanli , ST-40 Fenglong, SP-6 Sanyinjiao were given 12 times, 3 times a week, with the principle of therapy to reinforce phlegm, strengthen the spleen and raise the spleen. …”
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Defining the future of occupational therapy: A concept analysis of leadership development by Tracey E. Recigno, Jewel Shepherd, Paula Kramer, Jessica McHugh Conlin

“…Further examination of leadership development in the occupational therapy literature may provide helpful insights and strengthen the opportunity to study this concept and its efficacy.Aims/Objectives The focus of this concept analysis was to conduct a review of the historical and contemporary occupational therapy literature to evaluate how the profession distinguishes the concept of leadership development.Material and Method A principle-based concept analysis provides holistic perspectives of a concept by examining its historical and linguistic foundations.Results Dialogue about leadership development was primarily situated in grey literature with few articles found in empirical-focused, peer-reviewed journals. …”
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One-Instant Flux Observer design for Three-Phase induction motor with reduced bound active load rejection speed controller by AKRAM HASHIM HAMEED, SHIBLY A. AL-SAMARRAIE, AMJAD JALEEL HUMAIDI

“…The proposed flux observer fused barrier function adaptive mechanism with integral sliding mode control principle to yield BFISMO. Rigorous stability analysis has been conducted to achieve global flux estimation error ultimate boundedness. …”
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Prediction Method for the Ground Vibration Damage Boundary of Thick and Hard Rock Layer Fracture Type Mine Quakes by Ming Zhang, Xuelong Hu, Min Tu, Yong Yue, Qingwei Bu

“…In this study, based on the example of the ground vibration damage response of a thick and hard rock layer fracture type mine quake, and by applying the theories of mine pressure, rock mechanics and vibration energy principle, the concept of “vibration damage boundary” of mine quake ground, which uses particle vibration velocity to evaluate the vibration damage, is proposed. …”
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Deep learning models for analysis of non‐destructive evaluation data to evaluate reinforced concrete bridge decks: A survey by Dayakar Naik Lavadiya, Sattar Dorafshan

“…First a brief overview of the working principle of NDE techniques and DL architectures is provided, and then the information about proposed DL models and their efficacy is highlighted. …”
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Condition monitoring of urban rail transit by local energy harvesting by Mingyuan Gao, Yunwu Li, Jun Lu, Yifeng Wang, Ping Wang, Li Wang

“…This article introduces the principle, modeling, and experimental test of the system, including (1) an electromagnetic energy harvesting prototype with DC-DC boost converter and lithium battery charge management function, (2) wireless sensor nodes integrated with accelerometer and temperature/humidity sensor, and (3) a vehicle-track interaction model that considers wheel out-of-roundness. …”
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Quantum Computation via Multiport Discretized Quantum Fourier Optical Processors by Mohammad Rezai, Jawad A. Salehi

“…For instance, we demonstrate the principle by implementing the single-qubit Hadamard and the two-qubit controlled-<sc>not</sc> gates via simulation and optimization techniques. …”
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Lossy Joint Source-Channel Coding Using Raptor Codes by O. Y. Bursalioglu, M. Fresia, G. Caire, H. V. Poor

“…The straightforward application of Shannon's separation principle may entail a significant suboptimality in practical systems with limited coding delay and complexity. …”
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Mechanical Properties of Steel-FRP Composite Bars under Tensile and Compressive Loading by Zeyang Sun, Yu Tang, Yunbiao Luo, Gang Wu, Xiaoyuan He

“…Based on the good simulation results of ordinary steel bar and FRP bar under compressive loading, the compressive behavior of SFCB under monotonic loading was studied using the principle of equivalent flexural rigidity. There are three failure modes of SFCB under compressive loading: elastic buckling, postyield buckling, and no buckling (ultimate compressive strength is reached). …”
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Seismic Behavior Experimental Study on the Joint of Circular Tubed Steel-Reinforced Concrete Columns by Yan Dai, Shaofeng Nie, Tianhua Zhou, Chengfeng Xue, Jingrong Peng

“…The results show that the new joint has reasonable failure characteristics, high bearing capacity, good ductility, excellent seismic energy dissipation performance, and strong resistance to strength and stiffness degradation, which meets the seismic design principle of “strong joint and weak component” and is suitable for the results with special requirements for seismic performance. …”
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Modernization of government management in empires of new time: comparative political analysis by A. D. Aseev, V. V. Shishkov

“…The Russian Empire - a special imperial system -implemented, within the framework of the unitary state, the principle of centralization of the system of management, but its implementation in the development of the central bureaucratic apparatus of the empire was limited by the autocratic monarchy. …”
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Use of wood-plastic composites in 4D printing technology by Daša Krapež Tomec, test test, Aleš Straže, Matevž Kokot, Manja Kitek Kuzman, Mirko Kariž

“…To monitor the change in shape, or curvature, we fabricated composite test specimens using the bimetal principle (actuators), in which we used PLA for the passive layer and wood-PLA for the active layer in different thickness ratios and exposed them to laboratory and external conditions. …”
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