Results 71 to 80 of about 10,690,097 (295)
On the Calculation of Low Frequency Oscillations of the Earth's Core [PDF]
Symposium - International Astronomical Union, 1990 The problem of calculation of low frequency oscillations of an ideal rotating compressible fluid is investigated. An original method of solving such a problem, based on using characteristic functions of the Poincaré operator is proposed. An efficient scheme of calculating the characteristic numbers and functions of the Poincaré operator is worked out ...
openaire +1 more source
Optimization of the Production of Rubber Compounds Using Mathematical Models
Advanced 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
Additive Manufacturing of Alumina‐Reinforced Elastomers
Advanced Engineering Materials, EarlyView.Vat‐photopolymerized elastomers reinforced with platelet‐shaped alumina exhibited preferential orientation, reduced porosity, and significantly enhanced mechanical performance. A 3 wt% platelet loading increased tensile strength from 12.4 to 45.7 MPa, highlighting the critical role of filler morphology in elastomeric VPP composites.
Majid Barzegar Keyvani +6 more
wiley +1 more source
Damping of low frequency pressure oscillation [PDF]
, 2007 A hydraulic line between a hydraulic pump and an actuator comes under much stress when a pulsatile actuator is used. It causes a huge pressure oscillation in the hydraulic system and thus decreases reliability.
Ijas, M.
core
Applied SciencesUltra-low-frequency oscillation (ULFO) is a new problem of frequency stability in asynchronous network back-end power networks. The negative damping provided by hydropower units is the direct cause of ultra-low-frequency oscillation, and DC modulation is
Chao Xing +7 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley +1 more source
The relationship between the SOI and extended tropical precipitation in simulations of future climate change [PDF]
, 2002 The Southern Oscillation Index (SOI), its relationship with precipitation, and how greenhouse gas-induced changes in climate may modify these relationships has been examined in 12 coupled atmosphere-ocean Global Climate Model (GCM) experiments. The model
Doherty, Ruth, Hulme, Mike
core +1 more source
Seismology and geodesy of the sun: Low-frequency oscillations [PDF]
Proceedings of the National Academy of Sciences, 1981 The hourly averages of the solar ellipticity measured from June 13 to Sept. 17, 1966, are analyzed for indications of solar oscillations with periods in excess of 2 hr ν < 0.5 hr -1 . Nothing significant is found for frequencies ν > 0.1 hr -1 but ...
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali +5 more
wiley +1 more source
Research on the Influence of Switching Frequency on Low-Frequency Oscillation in the Voltage-Controlled Buck-Boost Converter [PDF]
, 2011 The influence of switching frequency on the low-frequency oscillation in the voltage-controlled buck-boost converter is studied in this paper. Firstly, the mathematical model of this system is derived.
Faqiang Wang, Xikui Ma
core +1 more source