Results 11 to 20 of about 164,585 (269)
Nonlinear Helmholtz equations with sign-changing diffusion coefficient
Comptes Rendus. Mathématique, 2022 In this paper, we study nonlinear Helmholtz equations with sign-changing diffusion coefficients on bounded domains. The existence of an orthonormal basis of eigenfunctions is established making use of weak $\mathtt{T}$-coercivity theory.
Mandel, Rainer +2 more
doaj +1 more source
Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor [PDF]
Journal of Advanced Dielectrics, 2018 The nonlinear properties of ZBMCCS-based varistors, which are composed of ZnO–Bi2O3–MnO2–Cr2O3–Sb2O3–Co3O4 and SiO2 are studied inrelation to sintering temperature, in the range of 1280–1350∘C.
Ahmed Bouchekhlal, Farida Hobar
doaj +1 more source
Tạp chí Khoa học Đại học Đà Lạt, 2021 The analytical expression for the self-Kerr nonlinear coefficient in a three-level V-type atomic medium is found in the presence of the Doppler effect.
Le Van Doai, Dinh Xuan Khoa
doaj +1 more source
Improvement of Optical Properties in Hexagonal Index-guiding Photonic Crystal Fiber for Optical Communications [PDF]
Mathematics Interdisciplinary Research, 2017 Waveguides with low confinement loss, low chromatic dispersion, and low nonlinear effects are used in optical communication systems. Optical fibers can also be employed in such systems.
Saeed Olyaee +2 more
doaj +1 more source
IEEE Photonics Journal, 2022 The digital back-propagation (DBP) is an effective algorithm to compensate for the nonlinear impairments in high-baud-rate and long-haul optical systems.
Meng Yang +3 more
doaj +1 more source
Modeling nonlinear acoustic waves in media with inhomogeneities in the coefficient of nonlinearity. [PDF]
The Journal of the Acoustical Society of America, 2010 The refraction and scattering of nonlinear acoustic waves play an important role in the realistic application of medical ultrasound. One cause of these effects is the tissue dependence of the nonlinear medium behavior. A method that is able to model those effects is essential for the design of transducers for novel ultrasound modalities.
Demi, L. +2 more
openaire +2 more sources
Research on Residual Life Estimation Method for KMN Steel Based on Nonlinear Ultrasonic Testing
Applied Sciences, 2021 The testing of KMN steel bending fatigue with different cycles was carried out using a nonlinear ultrasonic detector to obtain its nonlinear coefficient. The experimental results show that the nonlinear coefficient first increases and then decreases with
Pengfei Wang +3 more
doaj +1 more source
ON INTEGRABILITY OF VARIABLE COEFFICIENT NONLINEAR SCHRÖDINGER EQUATIONS [PDF]
Reviews in Mathematical Physics, 2012 We apply Painlevé test to the most general variable coefficient nonlinear Schrödinger (VCNLS) equations as an attempt to identify integrable classes and compare our results versus those obtained by the use of other tools like group-theoretical approach and the Lax pairs technique of the soliton theory.
Özemir, Cihangir, Güngör, Faruk
openaire +3 more sources
Factors of Nonlinear-ultrasonic Detection and Its Application to HR3C Fireside Corrosion
Cailiao gongcheng, 2016 Based on the discussion of the factors influencing the nonlinear ultrasonic testing, the feasibility of nondestructive evaluation of HR3C fireside corrosion was investigated using nonlinear ultrasonic testing.
QIN Peng +4 more
doaj +1 more source
ETRI Journal, 2020 The study reports on the design and performance of two air‐filled and two partial ethanol‐filled photonic crystal fiber (PCF) structures with a tetra core for supercontinuum generation. The PCFs are nonlinear with ultra‐flattened zero dispersion.
Pranaw Kumar +2 more
doaj +1 more source