Results 61 to 70 of about 112,203 (263)

The growth of Weierstrass canonical products of genus zero with random zeros

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
Let $zeta=(zeta_n)$ be a complex sequence of genus zero, $au$ be its exponent ofconvergence, $N(r)$ be its integrated counting function,$pi(z)=prodigl(1-frac{z}{zeta_n}igr)$ be the Weierstrass canonical product, and$M(r)$ be the maximum modulus of this ...
Yu. V. Zakharko, P. V. Filevych
doaj  

Effect of High-Temperature Heat Treatment on the Acoustic-Vibration Performance of Picea jezoensis

open access: yesBioResources, 2016
The crystallinity and acoustic-vibration parameters of Picea jezoensis, including specific Young’s modulus (E/ρ),coefficient of sound-radiation resistance (R), sound resistance (ω), and the ratio of Young’s modulus to the dynamic stiffness modulus (E/G),
Lingjing Zhu, Yixing Liu, Zhenbo Liu
doaj   +1 more source

Young's Modulus of Bilateral Infraspinatus Tendon Measured in Different Postures by Shear Wave Elastography Before and After Exercise

open access: yesOrthopaedic Surgery, 2021
Objective To investigate the Young's modulus value of infraspinatus tendons using shear wave elastography (SWE) technique in normal adults, and to analyze the influence of gender, postures, exercise, and dominant side on Young's modulus of infraspinatus ...
Menglei Yu   +12 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

open access: yesAdvanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova   +2 more
wiley   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

Research of wavelet analysis in hydropower station feeder fault quick detection algorithm

open access: yesDianzi Jishu Yingyong
A feeder microcomputer protection algorithm based on Symlets5 wavelet is proposed to address the current situation of long sampling algorithm time in commonly used microcomputer relay protection devices for hydropower station feeders, as well as the ...
Wan Haoping
doaj   +1 more source

Correlation between microscopic parameters and dynamic elastic modulus of loess

open access: yesYantu gongcheng xuebao, 2019
The silty soil and silty clay samples of 2~12 m-deep soil layer of the Minxian Seismic Station and the Qingyang Loess Plateau are studied by the dynamic triaxial and scanning electron microscopy experiments, and the dynamic elastic modulus and ...
AN Liang 1, DENG Jin 1,2,3, GUO Peng 4, ZHANG Yang-peng 5, ZHENG Fang 1
doaj   +1 more source

Optimization of the Production of Rubber Compounds Using Mathematical Models

open access: yesAdvanced Engineering Materials, EarlyView.
Rubber compounds were mixed in a batch internal mixer, and symbolic regression was used to derive mathematical models linking recipe and process parameters to ram path, torque, and mixing quality (incorporation, dispersion, distribution). Subsequent optimization with evolutionary algorithms identified operating conditions that reduce specific energy ...
Anke Bardehle   +7 more
wiley   +1 more source

On the derivative and maximum modulus of a polynomial

open access: yesJournal of Inequalities and Applications, 2006
If is a polynomial of degree , having all its zeros in , then it was proved by Turán that . This result of Turán was generalized by Govil, who proved that if has all its zeros in , , then , .
Govil NK   +3 more
doaj  

Comparative investigation on dynamic shear modulus and damping ratio of marine soils in different seas

open access: yesYantu gongcheng xuebao, 2020
To understand the variation characteristics of dynamic shear modulus G and damping ratio with the increasing depth H of marine soils, a series of resonant column tests are performed on silty clay with various depths taken from the three borehole ...
YANG Wen-bao 1, CHEN Guo-xing 1, 2, WU Qi 1, QIN You 1, ZHAO Kai 1, 2
doaj   +1 more source

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