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Dynamic normal forms and dynamic characteristic polynomial

open access: yesTheoretical Computer Science, 2008
We present the first fully dynamic algorithm for computing the characteristic polynomial of a matrix. In the generic symmetric case our algorithm supports rank-one updates in O(n^2 log n) randomized time and queries in constant time, whereas in the general case the algorithm works in O(n^2 k log n) randomized time, where k is the number of invariant ...
Frandsen, Gudmund Skovbjerg   +1 more
core   +4 more sources

The Dynamic Characteristic and Hysteresis Effect of an Air Spring

open access: yesInternational Journal of Applied Mechanics and Engineering, 2015
In many applications of vibration technology, especially in chassis, air springs present a common alternative to steel spring concepts. A design-independent and therefore universal approach is presented to describe the dynamic characteristic of such ...
F. Löcken, M. Welsch
doaj   +2 more sources

INFLUENCE OF CHANGES IN THE WORKING TEMPERATURE OF FLEXIBLE COUPLINGS ON THEIR STIFFNESS CHARACTERISTICS [PDF]

open access: yesTransport Problems, 2022
This article compares flexible couplings of the spider-type insert, and the tire-type insert. The influences of the volume and hardness of the elastomeric connector on the characteristics of this type of coupling, as well as the course of the change of ...
Tadeusz OPASIAK   +3 more
doaj   +1 more source

Study on the Stiffness and Dynamic Characteristics of a Bridge Approach Zone: Tests and Numerical Analyses

open access: yesMathematics, 2023
This study focuses on the stiffness and dynamic characteristic rules of a bridge approach zone in a high-speed railway (HSR). Indoor and in situ tests were performed to explore the stiffness and dynamic characteristics of the roadbed filling.
Ping Hu   +5 more
doaj   +1 more source

Dynamic Characteristics and Stability of the Photovoltaic Cell Under Laser Intensity or Load Disturbance in Laser Wireless Power Transmission System

open access: yesIEEE Access, 2023
In laser wireless power transmission (LWPT) system, the dynamically varying laser intensity or load on the photovoltaic (PV) cell may result in significant decrease of the power, efficiency and stability.
Zhenyang Xiong   +4 more
doaj   +1 more source

Moisture Assessment of Oil-Immersed Paper Based on Dynamic Characteristics of Frequency Domain Spectroscopy

open access: yesIEEE Access, 2022
In on-site measurement, as the transformer’s structure is often unknown, the application of frequency domain spectroscopy (FDS) is greatly limited in moisture assessment of transformer.
Qingchuan Xu   +3 more
doaj   +1 more source

Health status identification of modular-block-reinforced soil retaining walls after earthquakes

open access: yesYantu gongcheng xuebao, 2023
Distribution of dynamic characteristics (natural frequency and damping ratio) of large-scale shaking table model tests on a reinforced soil retaining wall (RSRW) under different working conditions is analyzed by using the time-domain identification ...
LI Sihan 1, 2, 3, CAI Xiaoguang 2, 3, 4, JING Liping 1, 5, CAI Boyuan 1, 3, HUANG Xin 1, 2, 3, XU Honglu 5
doaj   +1 more source

Experimental determination of the dynamic characteristics of the vibrations damper

open access: yesTrudy Odesskogo Politehničeskogo Universiteta, 2015
One type of object modeling — physical modeling — plays an important role in modern scientific researches. This type of modeling is carried out on the existing laboratory equipment and experimental samples of a real object, which in some way reflects the
Igor I. Sydorenko   +2 more
doaj   +3 more sources

Integration of Wavelet Denoising and HHT Applied to the Analysis of Bridge Dynamic Characteristics

open access: yesApplied Sciences, 2020
When the dynamic characteristics of a bridge structure are analyzed though Hilbert–Huang transform (HHT), the noise contained in the bridge dynamic monitoring data may seriously affect the performance of the first natural frequency identification. A time-
Xinpeng Wang   +4 more
doaj   +1 more source

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