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261
Effect of Low-Temperature Storage on Chemical Composition and Antimicrobial Activity of Honey
Published 2024-07-01Get full text
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262
Adaptive Robust Dynamic Surface Integral Sliding Mode Control for Quadrotor UAVs under Parametric Uncertainties and External Disturbances
Published 2020-01-01“…The main contributions of the proposed ADSISMC strategy are as follows: (1) The combination of dynamic surface and integral sliding mode makes the system always in sliding stage by finding the appropriate initial position compared with the common sliding mode, and the complexity of explosion in backstepping method is eliminated. (2) By introducing the fuzzy system, the unknown functions and uncertainties can be approximated which significantly improves the robustness and the tracking performance. (3) The switching control strategy is utilized to compensate for the errors between estimated and ideal inputs; the tracking performance of the whole system has been significantly improved. …”
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263
Nonsingular Global Fast Terminal Sliding Mode Control with Extended State Observer for Contact Force Regulation in Aerial Manipulator
Published 2022-01-01“…First, a contact force control method without employing the force sensor is obtained on the mechanical relationship of the system’s contact with the environment. …”
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264
Super Twisting Disturbance Observer-Based Fixed-Time Sliding Mode Backstepping Control for Air-Breathing Hypersonic Vehicle
Published 2020-01-01“…Simulation results demonstrate the effectiveness of the composite method.…”
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265
Investigation of resonant phenomena in a locomotive wheelset on the basis of calculation of natural frequencies and modes of their oscillations on finite element models
Published 2017-08-01“…The prototype of the finite-element model considered in the article was the WS of a locomotive with an asynchronous transmission, a one-way reducer and a composite retaining wheel. Methodical issues of performing such calculations, problems of assessing the degree of danger of proximity of vibration frequencies of structural elements are discussed. …”
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266
Analysis on High Temperature Corrosion of Water-Wall in a 440 t/h Boiler Under Low-NOx Combustion Mode
Published 2021-08-01Get full text
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267
Standard deviation as a suitable criterion for localizing damages in Nano- composite structures
Published 2024-12-01“… Wavelet transform is a proper method for detecting damages in signals such as vibration mode shapes. …”
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Research on Aircraft Control System Fault Risk Assessment Based on Composite Framework
Published 2025-06-01“…Although traditional methods such as Failure Mode, Effects, and Criticality Analysis (FMECA) and Fault Tree Analysis (FTA) can reflect the degree of fault risk to a certain extent, they cannot accurately quantify and evaluate the fault risk under the multiple influences of human factors, random faults, and external environment. …”
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270
Superposition, Composition and Separation of Casing Wave and P Wave of Formation in Cased Hole
Published 2023-04-01Get full text
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271
Influencing the damage process and failure behaviour of polymer composites – A short review
Published 2025-02-01“…These methods can also simplify structural health monitoring, which has great importance in several applications of composite materials. …”
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272
APPLICABILITY INVESTIGATION OF FAILURE CRITERION FOR POST-BUCKLING ANALYSIS OF STIFFENED COMPOSITE PANELS
Published 2020-01-01“…The validity of analysis method is proved. Five different failure criterions are adopted respectively in the FEM analysis and damage loads as well as failure modes is obtained. …”
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273
Weakening Detection of Composite Structure Adhesive Layer Based on Nonlinear Guided Waves
Published 2025-02-01“…In this study, a detection method utilizing nonlinear ultrasonic guided waves is presented to tackle the difficulties in detecting localized damage and weakening in bonded composite structures. …”
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274
Modeling the Buckling Characteristics of Pineapple Leaf Fibre Reinforced Laminated Epoxy Composites
Published 2023-11-01“…The elastic parameters were calculated analytically, whereas the buckling studies were carried out using the finite element method. Buckling was shown to be significantly influenced by the changes in volume fractions, plate aspect ratio, and buckling mode. …”
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Effects of varying loading rates on the Brazilian splitting characteristics of coal-rock composites
Published 2025-01-01“…ObjectivesTo investigate the tensile characteristics of coal-rock composite structures during the mining process, the study takes coal-rock composite specimens as the research object.MethodsBrazilian splitting tests were conducted on coal-rock composite specimens under varying loading rates using the RMT150B testing machine. …”
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277
Development of composition and technology of children's dental films with anesthetic and anti-inflammatory activity
Published 2017-10-01“…The content of flavonoids in terms of rutin in flowers of Chamomile and the resulting aqueous extracts was determined with spectrophotometria by Pharmacopoeias method. Film-forming solutions were prepared in accordance with their physico-chemical properties and recommended technological modes of preparation. …”
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278
Model-Free Adaptive Fast Integral Terminal Sliding Mode Control for Permanent Magnet Synchronous Motor with Position Error Constraint
Published 2025-06-01“…To address these challenges, this paper proposes a prescribed performance model-free adaptive fast integral terminal sliding mode control (PP-MFA-FITSMC) method. This approach replaces conventional techniques such as parameter identification, function approximation, and model reduction, offering advantages such as quantitative constraints on the PMSM tracking error, reduced chattering, strong disturbance rejection, and ease of engineering implementation. …”
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279
The Behavior of Reinforced Concrete Slabs Strengthened by Different Patterns and Percentages of Carbon Fiber-Reinforced Polymer (CFRP) Plate
Published 2025-04-01“…The objective of this study was to theoretically investigate the flexural behavior of RC slabs strengthened with carbon fiber-reinforced polymer (CFRP) plates applied in different percentages and patterns using finite element methods (FEMs) in comparison with the experiment outcomes available in the literature using the ABAQUS software (version 2020). …”
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280
Domestication of medicinal plants (Lonicera japonica Thunb.) in China: comparison of morphological, resistance and biochemical traits between wild and cultivated populations
Published 2025-01-01“…Therefore, this study aims to compare and analyze differences in morphology, resistance, and biochemical composition between wild and cultivated varieties.MethodsA total of 36 wild and 81 cultivated specimens were examined to compare plant morphology, flowering time, bud length, active ingredients, and resistance between wild and cultivated populations.ResultsThe cultivated honeysuckle exhibited several noteworthy characteristics, including more erect plant morphology, higher flower-to-leaf ratio, more obvious aggregation of flowers into clusters at the top of branches, higher frequency of flowering, and longer bud length compared to the wild type. …”
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