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6021
The Effectiveness of Ginger Rhizome Extract to Inhibit the Growth of Sclerotium rolfsii in Peanut In-vitro
Published 2022-07-01“…This study aimed to determine the proper concentration of ginger rhizome extract to control S.rolfsii, the causes of stem rot, and damping-off diseases in peanut in-vitro. This study used a completely randomized design with five treatments and five replications. …”
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6022
Modal Participation Estimated from the Response Correlation Matrix
Published 2019-01-01“…For the case of general damping, it is shown how the response correlation matrix is formed by the mode shape matrix and two transformation matrices T1 and T1 that contain information about the modal parameters, the generalized modal masses, and the input load spectral density matrix Gx. …”
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6023
Parametric Study on Dynamic Response of Fiber Reinforced Polymer Composite Bridges
Published 2015-01-01“…FRP bridge deck systems with lower damping compared to conventional bridge decks can lead to higher amplitudes of vibration causing dynamically active bridge deck leading serviceability problems. …”
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6024
Dynamic Characteristics of Magnetic Suspended Dual-Rotor System by Riccati Transfer Matrix Method
Published 2019-01-01“…According to the analysis, two rigid mode shapes remain unchanged with the variation of the relationship between their corresponding damped critical speeds (DCSs). Moreover, the rigid DCSs disappear with large derivative coefficient. …”
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6025
Bifurcation Characteristics of Fundamental and Subharmonic Impact Motions of a Mechanical Vibration System with Motion Limiting Constraints on a Two-Parameter Plane
Published 2021-01-01“…By combining the two-parameter plane diagram and the three-dimensional surface diagram, the effect of changing the gap values between each mass and the fixed constraint and the damping coefficient ζ on the dynamic characteristics of the system is studied. …”
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6026
Physics-Informed Kolmogorov-Arnold Networks for Power System Dynamics
Published 2025-01-01“…Furthermore, simulation results demonstrate PIKANs’ capability to accurately identify uncertain inertia and damping coefficients. This work opens up a range of opportunities for the application of KANs in power systems, enabling efficient dynamic analysis and precise parameter identification.…”
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6027
Nonlinear Dynamics of a Power-Split Transmission Unit with a Planetary Gear Train and Selectable One-Way Clutches
Published 2020-01-01“…Additionally, the increase of the damping ratio of the SOWC connected to sun gear can distinctly reduce the vibration and maximum dynamic load of the system on the entire working range.…”
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6028
Study of the Complex Stiffness of a Vibratory Mechanical System with Shape Memory Alloy Coil Spring Actuator
Published 2014-01-01“…This paper aims to analyze the behavior of the stiffness and damping of a SMA helical coil spring actuator coupled to a mechanical system of one degree of freedom (1 DOF) subjected to an unbalanced excitement force and a temperature control system. …”
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6029
Internal Friction on AISI 304 Stainless Steels with Low Tensile Deformations at Temperatures between −50 and 20C
Published 2010-01-01“…The morphology, distribution and volumetric fractions of the martensites were characterized by metallography and dilatometry analysis and quantified by ferrite detector measurements. The damping behavior of specimens with different volumetric fractions of martensites was studied in an inverted torsion pendulum in the 40C to 400C range. …”
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6030
An Experimental Study of the Properties of Carbon Fiber/Epoxy Composites Mixed with Rubber Granules
Published 2024-01-01“…The DMA teat findings show that ECR composites having 10% natural rubber have higher damping factor, storage, and loss modulus. The SEM analysis shows that ECR hybrid composites with 10% rubber particles contained a uniform distribution of rubber particles over reinforcement, and also, there were no cracks and voids. …”
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6031
Establishment of Approximate Analytical Model of Oil Film Force for Finite Length Tilting Pad Journal Bearings
Published 2015-01-01“…The model of dynamic stiffness, damping, and added mass coefficients is often used for rotordynamic analyses, and this method does not suffice to describe the dynamic behaviour due to the nonlinear effects of oil film force under larger shaft vibration or vertical rotor conditions. …”
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6032
Acoustic frequency comb generation on a composite diamond/silicon microcantilever in ambient air
Published 2025-01-01“…Previously, implementation of AFCs on mechanical microresonators with large air damping loss is difficult, which restricted their atmospheric applications. …”
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6033
Yttrium iron garnet: Dodecahedral substitutions
Published 2025-03-01“…Yttrium iron garnet (YIG) is a widely studied magnetic ceramic known for its low magnetic damping, high electrical resistivity, and low dielectric losses, which make it essential for various applications like microwave and radar systems, spintronic devices, oscillators, filters, phase shifters, and magneto-optical devices. …”
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6034
Static and Dynamic Experiment Evaluations of a Displacement Differential Self-Induced Magnetorheological Damper
Published 2015-01-01“…The theory deduction and the experimental results indicate that the proposed DDSMRD has the ability of the integrated displacement sensor in addition to the output controllable damping force.…”
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6035
Steady Glide Dynamic Modeling and Trajectory Optimization for High Lift-to-Drag Ratio Reentry Vehicle
Published 2016-01-01“…Steady glide trajectory optimization for high lift-to-drag ratio reentry vehicle is a challenge because of weakly damped trajectory oscillation. This paper aims at providing a steady glide trajectory using numerical optimal method. …”
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6036
Calculation of Rotor Dynamic Coefficients for Labyrinth Seals
Published 1998-01-01“…The method is also shown to be useful in predicting the order of magnitude of principal stiffness and damping coefficients.…”
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6037
Dynamic Reliability Evaluation on Foundation of Stone Cutting Machine under Ambient Excitation
Published 2022-01-01“…After getting the detected data, a fast identified process is available for fastly identifying the dynamic parameter foundation of stone cutting machine by using the peak-picking method, in which the natural frequency of foundation is able to be first identified by the equivalent frequency response function for the self-power spectrum of the foundation; subsequently, the damping ratio of the foundation, on the basis of the previous result of natural frequency, is identified by the half-power broadband technology; eventually, after obtaining these dynamic parameters identified, the failure probability of the foundation and its corresponding dynamic reliability index, under ambient excitation, is capable to be calculated based on the first-passage probability of the maximum response. …”
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6038
Dynamic Mechanical Analysis of Banyan/Ramie Fibers Reinforced with Nanoparticle Hybrid Polymer Composite
Published 2022-01-01“…The results revealed the maximum storage modulus is 1580 MPa at 93.8°C and a loss modulus of 298 MPa at 93.8°C in sample A, 12% more storage modulus, 17% more loss modulus was obtained in sample A compared to sample B, and 29% E′ and 27% E″ more compared to sample E and also using storage modulus, loss modulus, damping factor are the viscoelastic behavior which can reveal the glass transition temperature of hybrid composite laminates by conducting dynamic mechanical analysis, and SEM test was used to identify the failure mode of hybrid composite.…”
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6039
Attenuation of progressive surface gravity waves by floating spheres
Published 2025-01-01“…Theoretical models used previously in the study of surface wave damping by sea ice do not capture correctly the physics of wave attenuation by floating spheres. …”
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6040
Research on Vibration Reduction Design of Foundation with Entangled Metallic Wire Material under High Temperature
Published 2019-01-01“…The optimization of the constraining layer was carried out by modal analysis. The damping performance of the composite foundation with EMWM was validated by the thermal-vibration joint test. …”
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