منابع مشابه
Geometry, Physics, and Harmonic Functions
Mathematics is a language of rigor and clarity. A plethora of symbols and words litter every student’s math textbooks, creating arguments and generalizations. Pictures, on the other hand, are more commonly left out of the texts. There are many reasons for this: how is one to visualize 5-space? How can one prove a fact with a picture? Its cliche, but things really aren’t always how they appear. ...
متن کاملSolution of strongly nonlinear oscillator problem arising in Plasma Physics with Newton Harmonic Balance Method
In this paper, Newton Harmonic Balance Method (NHBM) is applied to obtain the analytical solution for an electron beam injected into a plasma tube where the magnetic field is cylindrical and increases towards the axis in inverse proportion to the radius. Periodic solution is analytically verified and consequently the relation between the Natural Frequency and the amplitude is obtained in an ana...
متن کاملComparison of contrast-enhanced fundamental imaging, second-harmonic imaging, and pulse-inversion harmonic imaging.
RATIONALE AND OBJECTIVES To investigate the feasibility of recent contrast-specific ultrasound techniques in depicting vascular flow and the effects of changing the output power of the transducer and insonation mode on contrast enhancement, the authors performed an experimental study with a flow phantom. METHODS While changing the mechanical index and the sound insonation mode (continuous and...
متن کاملTissue harmonic imaging
Harmonics have much significance in music. A musical note has three characteristics. 1 Pitch (or frequency) 2 Loudness 3 Quality (or tone). Quality is the audible difference heard between two musical notes of the same pitch and loudness. Hence, a piano based C-note does not sound the same as a C-note played on a guitar, due to the existence of harmonic frequencies. The same note from various in...
متن کاملSecond-harmonic imaging of collagen.
Molecules that have no center of symmetry are able to convert light to its second harmonic, at twice the frequency and half the wavelength. This only happens with any efficiency at very high light intensities such as are given by a pulsed laser, and because the efficiency of the process depends on the square of the intensity, it will be focal plane selective in exactly the same way as two-photo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Korean Society for Nondestructive Testing
سال: 2012
ISSN: 1225-7842
DOI: 10.7779/jksnt.2012.32.5.564