نتایج جستجو برای: rotation mode

تعداد نتایج: 292919  

2004
S. A. Sabbagh J. M. Bialek R. E. Bell A. H. Glasser B. P. LeBlanc J. E. Menard F. Paoletti M. G. Bell R. Fitzpatrick E. D. Fredrickson A. M. Garofalo D. A. Gates S. M. Kaye L. L. Lao R. Maingi D. Mueller G. A. Navratil

One of the goals of the National Spherical Torus Experiment (NSTX) is to investigate the physics of global mode stabilization in a low aspect ratio device. NSTX has a major radius R0 = 0.86 m, a midplane half-width of 0.7 m, and an on-axis vacuum toroidal field B0 0.6 T and has reached a plasma current Ip = 1.5 MA. Experiments have established the wall-stabilized MHD operating space of the mach...

Journal: :Monthly Notices of the Royal Astronomical Society 1996

1999
Herbert Dawid Heinrich Meyr

Digital signal processing (DSP) algorithms exhibit an increasing need for the e cient implementation of complex arithmetic operations. The computation of trigonometric functions, coordinate transformations or rotations of complex valued phasors is almost naturally involved with modern DSP algorithms. Popular application examples are algorithms used in digital communication technology and in ada...

2007
R. A. García S. Mathur J. Ballot A. Eff - Darwich S. J. Jiménez - Reyes S. G. Korzennik

The solar rotation profile is well constrained down to about 0.25 R⊙ thanks to the study of acoustic modes. Since the radius of the inner turning point of a resonant acoustic mode is inversely proportional to the ratio of its frequency to its degree, only the low-degree p modes reach the core. The higher the order of these modes, the deeper they penetrate into the Sun and thus they carry more d...

2008
Dong Lai David Tsang

We study the global stability of non-axisymmetric p-modes (also called inertial-acoustic modes) trapped in the inner-most regions of accretion discs around black holes. We show that the lowest-order (highest-frequency) p-modes, with frequencies ω = (0.5− 0.7)mΩISCO (where m = 1, 2, 3, · · · is the azimuthal wave number, ΩISCO is the disc rotation frequency at the Inner-most Stable Circular Orbi...

2004
B. E. Chapman R. Fitzpatrick G. Spizzo

Growth to large amplitude of a single core-resonant tearing mode in the Madison Symmetric Torus @R. N. Dexter et al., Fusion Technol. 19, 131 ~1991!# reversed-field pinch is accompanied by braking and eventual cessation of mode rotation. There is also a concurrent deceleration of bulk plasma rotation. The mode deceleration is shown to be well described by a time-dependent version of a magnetohy...

1995
Tzyy-Schiuan Yang Peter Vöhringer David C. Arnett Norbert F. Scherer

A rigorous theoretical connection between the polarizability spectral density obtained from optical Kerr effect ~OKE! measurement with the correlation function describing solvent-induced optical dephasing detected in photon echo measurements is given. The experimentally obtained spectral density has a more reasonable physical basis than model correlation function descriptions of solvent fluctua...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده فنی و مهندسی 1388

پروژه حاضر ضمن بررسی و تحلیل پروسه کنترل کیفی، به ارائه نرم افزاری به منظور پردازش تصویر فانتوم کنترل کیفی دستگاه سونوگرافی b-mode می پردازد. این نرم افزار برای استخراج پارامتر های کنترل کیفی دستگاه سونوگرافی b-mode مورد استفاده قرار خواهد گرفت. پارامترهای کنترل کیفی مورد بررسی در این پروژه عبارتند از : اندازه گیری عمق نفوذ موج ماورا صوت بررسی توان دستگاه دراندازه گیری فواصل عمقی بررسی ت...

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