scholarly journals Radiation power and linewidth of a semifluxon-based Josephson oscillator

2014 ◽  
Vol 104 (6) ◽  
pp. 062603 ◽  
Author(s):  
M. Paramonov ◽  
M. Yu. Fominsky ◽  
V. P. Koshelets ◽  
B. Neumeier ◽  
D. Koelle ◽  
...  
Keyword(s):  
Radiation Power ◽  
Josephson Oscillator

Influence of a radial inhomogeneity of the active medium on the output radiation power from a cw CO2 laser with fast axial flow

1996 ◽  
Author(s):  
Michail G. Galushkin ◽  
Vladimir S. Golubev ◽  
V. V. Dembovetsky ◽  
Yuri N. Zavalov ◽  
Valentina Y. Zavalova
Keyword(s):  
Active Medium ◽  
Co2 Laser ◽  
Radiation Power ◽  
Axial Flow ◽  
Output Radiation ◽  
Radial Inhomogeneity ◽  
Cw Co2 Laser ◽  
Output Radiation Power

Limitation of optical radiation power by organic molecules: II. Porphyrins and phthalocyanines

2004 ◽  
Vol 34 (2) ◽  
pp. 139-146 ◽  
Author(s):  
Rimma T Kuznetsova ◽  
T N Kopylova ◽  
G V Mayer ◽  
L G Samsonova ◽  
Valerii A Svetlichnyi ◽  
...  
Keyword(s):  
Optical Radiation ◽  
Organic Molecules ◽  
Radiation Power

scholarly journals Parametric Study on Microwave-Assisted Pyrolysis Combined KOH Activation of Oil Palm Male Flowers Derived Nanoporous Carbons

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2876
Author(s):  
Napat Kaewtrakulchai ◽  
Kajornsak Faungnawakij ◽  
Apiluck Eiad-Ua
Keyword(s):  
Microwave Radiation ◽  
Oil Palm ◽  
Radiation Power ◽  
Operating Time ◽  
Bet Surface Area ◽  
Koh Activation ◽  
Nanoporous Carbons ◽  
Microwave Assisted ◽  
Activating Agent ◽  
Male Flowers

Oil palm male flowers (PMFs), an abundant agricultural waste from oil palm plantation in Thailand, have been utilized as an alternative precursor to develop nanoporous carbons (NPCs) via microwave-assisted pyrolysis combined potassium hydroxide (KOH) activation. The influences of relevant processing variables, such as activating agent ratio, microwave power, and activation time on the specific pore characteristics, surface morphology, and surface chemistry of PMFs derived nanoporous carbons (PMFCs) have been investigated to explore the optimum preparation condition. The optimum condition under a microwave radiation power of 700 W, activation holding time of 6 min, and activating agent ratio of 2:1 obtained the PMFC with the highest Brunauer–Emmett–Teller (BET) surface area and total pore volume approximately of 991 m2/g and 0.49 cm3/g, composed of a carbon content of 74.56%. Meanwhile, PMFCs have a highly microporous structure of about 71.12%. Moreover, activating agent ratio and microwave radiation power indicated a significant influence on the surface characteristics of PMFCs. This study revealed the potential of oil palm male flowers for the NPCs’ production via microwave-assisted KOH activation with a short operating-time condition.

Microwave source with enhanced radiation power based on orbitron MASERs

2020 ◽  
Vol 15 (01) ◽  
pp. P01016-P01016
Author(s):  
A.H. Esmaeili ◽  
S. Matlou ◽  
A. Rostam ◽  
K. Goudarzi
Keyword(s):  
Radiation Power ◽  
Microwave Source

Development of Electroless Ni-P/NRAM Nanocomposite Powder with Enhanced Microwave Absorption Properties

2009 ◽  
Vol 67 ◽  
pp. 59-64 ◽  
Author(s):  
Rahul Sharma ◽  
Ramesh Chandra Agarwala ◽  
Vijaya Agarwala
Keyword(s):  
Electron Microscope ◽  
Microwave Absorption ◽  
Radiation Power ◽  
Nanocomposite Powder ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Radar Absorbing Material ◽  
Transmission Electron ◽  
Absorbing Material ◽  
Nanocomposite Powders

Nano radar absorbing material (NRAM) i.e. BaMe2Fe16O27 (Me2+=Fe2+) powder (10 nm) is coated with amorphous Ni-P nano layer (5-10 nm) by using electroless (EL) technology to develop EL Ni-P/NRAM nanocomposite powder. The experimental processes parameters and EL Ni-P bath composition were optimized to obtain the deposition. As-deposited nanocomposite powder was microwave annealed (MWA) with increasing radiation power from 160 to 760 watts for 5 minutes. The surface morphology, elemental contents, phase transformation and magnetic properties of NRAM powders were examined under field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) respectively. Maximum reflection loss (RL) 33.75 dB at 15.80 GHz for nanocomposite powder MWA at 760 watt was obtained the absorption range under −15 dB is from 13.76 to 16.77 GHz with 2 mm thickness layer in Ku Band. Excellent microwave absorption properties due to accurate electromagnetic (EM) match in the nanocomposite microstructure, a strong natural resonance and multipolarization. Such (Ni+ Ni3P)/NRAM nanocomposite powders may be attractive candidates for EM absorption.

scholarly journals A hierarchical optimization strategy for position and thickness optimization of constrained layer damping/plate to minimize sound radiation power

2018 ◽  
Vol 10 (10) ◽  
pp. 168781401880325 ◽  
Author(s):  
Dongdong Zhang ◽  
Tang Qi ◽  
Ling Zheng
Keyword(s):  
Radiation Power ◽  
Sound Radiation ◽  
Hierarchical Optimization ◽  
Initial Structure ◽  
Sound Power ◽  
Constrained Layer Damping ◽  
Optimization Strategy ◽  
Optimal Position ◽  
Damping Materials ◽  
Sound Radiation Power

A hierarchical optimization strategy is proposed to optimally design constrained layer damping materials patched on the base plate for minimizing sound radiation power. A sound radiation optimization model is established by taking positions and thicknesses of constrained layer damping materials as design variables, and added mass as constraints. The hierarchical optimization procedure is implemented, in which evolutionary structural optimization method is employed to get optimal position layouts of constrained layer damping materials, and genetic algorithm is used to find optimal thickness configurations of constrained layer damping materials by taking the plate with optimal position layouts of constrained layer damping materials as initial structure. Two sound power sensitivities are formulated and compared for position optimization. Numerical examples in which unweighted/weighted objective functions are considered are presented, optimal positions and thickness configurations of constrained layer damping materials patched on the plate are obtained and discussed. The results demonstrate that the proposed strategy is very effective to achieve larger sound power reduction by reconfiguring the thickness of constrained layer damping materials for the results of position optimization.

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