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Topic: Sinusoid


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  PlanetMath: sinusoid
A sinusoid is a curve of the form
This is version 7 of sinusoid, born on 2005-05-22, modified 2007-10-01.
Object id is 7101, canonical name is Sinusoid.
www.planetmath.org /encyclopedia/Sinusoid.html   (119 words)

  
 Sinusoid
Sinusoid is the curve of the sine function.
Sinusoid is the orthogonal projection of the space curve helix.
Sinusoid is the development of an obliquely cut right circular cylinder.
xahlee.org /SpecialPlaneCurves_dir/Sinusoid_dir/sinusoid.html   (638 words)

  
 Primary Cultures of Endothelial Cells from the Human Liver Sinusoid are Permissive for Human Immunodeficiency Virus ...
Human endothelial cells isolated from hepatic sinusoids were infected in vitro with human immunodeficiency virus type 1 (HIV-1).
An early sign of infection occurring in the culture was the formation of multinucleated cells.
The possibility that endothelial cells of the liver sinusoid are infected in vivo with HIV remains to be clearly shown.
www.pnas.org /cgi/content/short/89/5/1582   (531 words)

  
 Methods and apparatus for determining minimum cyclicprefix durations - Patent 6985433
In another embodiment, the sinusoid signals are baseband, wherein the signals are to be mixed to the carrier frequency in a later stage.
In one embodiment of the invention, the sinusoid signal is generated by an analog signal generator, where the phase and the amplitude of the sub-carrier waveform are set by an OFDM sub-carrier symbol.
In one embodiment of the invention, where a constant-amplitude phase-modulated sinusoid signal is generated for each sub-carrier, the power amplification is done with high-efficiency nonlinear power amplifiers such as class C power amplifiers, or done with linear power amplifiers of small peak setting.
www.freepatentsonline.com /6985433.html   (5875 words)

  
 Sinusoid (blood vessel) - Encyclopedia, History, Geography and Biography
Sinusoid of a rat liver with fenestrated endothelial cells.
A sinusoid is a small blood vessel similar to a capillary but with a fenestrated endothelium.
Sinusoids are found in the liver, lymphoid tissue, endocrine organs, and hematopoietic organs such as the bone marrow and the spleen.
www.arikah.com /encyclopedia/Sinusoid_%28blood_vessel%29   (207 words)

  
 Method of and device for measuring echo parameters on telephone lines - Patent 6501830
A signal having lenticular envelope is used as test signal and is generated preferably starting from a first sinusoid with a first given frequency modulated in amplitude with a second sinusoid having a second given frequency, lower than the aforesaid first given frequency.
The width of the window must preferably be a multiple of half the period of the sinusoid, and in phase therewith, in order to limit the harmonic content originated by the signal fronts.
This type of detection can suffer, when sinusoidal signals are used, from inaccuracies stemming from the fact that the difference in amplitude between adjacent peaks in the received signal, even if minimal, can cause a time offset of the determined arrival instant.
www.freepatentsonline.com /6501830.html   (3536 words)

  
 HRC Tap Correction
A better look at the sinusoidal distortion of the tap signal can be obtained by restricting the range of values of the third tap relative to the central tap This effectively restricts the events to a limited range of fine positions.
In this figure the sinusoid that is plotted with a dashed line is the same as the one in figure 7; clearly, the zero-crossing points have shifted.
The coefficients of the sinusoid for the u-axis are different from those for the v-axis and are given in table 2.
hea-www.harvard.edu /~juda/memos/tap_correction.html   (1980 words)

  
 Properties of sinusoid signals   (Site not responding. Last check: )
A sinusoid signal with a period of 2 sec has a frequency of 0.5 Hz, and one with a frequency of 2 Hz has a period of 0.5 sec.
Likewise, a sinusoid signal with a period of 2 msec has a frequency of 0.5 kHz, and one with a frequency of 2 kHz has a period of 0.5 msec.
The resulting trace is approximately sinusoidal, the zero-crossing is when the stick is immediately in front of you, the positive peak being the furthest distance on the left (say), and the negative peak being the furthest distance on the right.
www.csis.ul.ie /ccmcm/cs5611/acoustics/analysis/node31.html   (302 words)

  
 Discrete Fourier series Transform
A sinusoid of 1 kHz with an amplitude of 50 mV, and a phase shift of pi/2.
A sinusoid of 2 kHz with an amplitude of 100 mV, and a phase shift of 0.
A sinusoid of 3 kHz with an amplitude of 100 mV, and a phase shift of 0.
www.4p8.com /eric.brasseur/fouren.html   (1225 words)

  
 Sinusoids: Applications and Modeling
Basically sinusoids are graphs of wave forms, hence any phenomena having periodic behavior or wave characteristics can be represented by trigonometric functions or (approximately) modeled by sinusoids.
The periodic rotation of the piston-crankshaft assembly in an engine generates a sinusoid when we plot the angle of rotation of the crankshaft vs. the distance from the piston to the center of the circle as illustrated in the animation in Figure 5.
However, as you near the poles the simple sinusoidal model is not robust enough as we have implemented it.
mathdemos.gcsu.edu /mathdemos/sinusoidapp/sinusoidapp.html   (2650 words)

  
 Fourier Transform Damped Sinusoid   (Site not responding. Last check: )
In the applet, the damped sinusoid is shown in purple.
The phase of the sinusoid can be changed by changing the phase parameter.
As the phase changes from 0 to 1 the sinusoid changes from a sine to a cosine.
cnyack.homestead.com /files/afourtr/ftdsoid.htm   (174 words)

  
 UA WebZine "Ask the Doctors!" November 05 | Phase Shift and Time Delay
The phase of a sinusoid is the starting time of a period of the sinusoid, expressed as a fraction of the period, usually in degrees or radians.
If the sinusoids are "in phase" (in other words, if the phase shift φ is zero or other integer multiple of 2π), then the two will add to a sinusoid of the same frequency with twice the original amplitude.
So when a sinusoid is added to a delayed version, the result is a sinusoid with an amplitude between zero and two times that of the original.
www.uaudio.com /webzine/2005/november/text/content2.html   (1203 words)

  
 Fun House Mirror Simulation
To simulate the reflection of sinusoid mirror, I assume the eyes’ position is at the 19/20 height of the whole picture, which is just the average ratio of the eye height to the whole person height.
Because the mirror is sinusoid mirror, it is easy to find the slope of the tangential line of it by differentiating it.
The result of sinusoid geometric operation can be seen in figure 5 and the result of circular geometric operation can be seen in figure 6.
www.ele.uri.edu /~hanx/MirrorSimulation.htm   (540 words)

  
 Representing a Radio Wave with a Sinusoid
For one repeating cycle, which the text identifies as a single revolution of a wheel, we say that phase has gone full circle, from 0° to 360°.
Since everything is based on sine waves, we will represent each sinusoid by amplitude and phase lead.
Remember that when we say phase in the vector addition that is to follow, we really mean the phase shift of the sine wave relative to an unshifted ideal sinusoid.
www.radarproblems.com /chapters/ch05.dir/ch05pr.dir/c05p1.dir/c05p1.htm   (577 words)

  
 Sinusoids
The ``phase'' of a sinusoid normally means the ``initial phase'', but in some contexts it might mean ``instantaneous phase'', so be careful.
This is also how the instantaneous frequency is defined when the phase is time varying.
denote the instantaneous phase of a sinusoid with a time-varying phase-offset
ccrma-www.stanford.edu /~jos/mdft/Sinusoids.html   (261 words)

  
 Synthesizing a sinusoid
First we need a pure sinusoid which is made with an oscillator.
The input is a frequency (in cycles per second), and the output is a sinusoid of peak amplitude one.
First, pure sinusoids are the signals most sensitive to the parasitic effects of quick amplitude change.
crca.ucsd.edu /~msp/techniques/latest/book-html/node12.html   (671 words)

  
 Jahrbuch-CD der MPG 2003 - Optimal Strategies for sinusoid
We derive and study optimal and nearly-optimal strategies for the detection of sinusoidal signals hidden in additive (Gaussian and non-Gaussian) noise.
Such strategies are an essential part of algorithms for the detection of the gravitational Continuous Wave signals produced by pulsars.
Optimal strategies are derived for the case where the signal phase is not known and the product of the signal frequency and the observation time is non-integral.
www.mpg.de /forschungsergebnisse/wissVeroeffentlichungen/archivListenJahrbuch/2002/06/publZIM26.html   (85 words)

  
 Synthesizing a sinusoid
First we need a pure sinusoid which is made with an oscillator.
The input is a frequency (in cycles per second), and the output is a sinusoid of peak amplitude one.
First, pure sinusoids are the signals most sensitive to the parasitic effects of quick amplitude change.
www-crca.ucsd.edu /~msp/techniques/v0.09/book-html/node11.html   (677 words)

  
 An Intuitive Explanation of Fourier Theory
The magnitude of the sinusoid corresponds to its contrast, or the difference between the darkest and brightest peaks of the image.
Here is another sinusoidal brightness image, this time with a lower spatial frequency, together with it's two-dimensional Fourier transform showing three peaks as before, except this time the peaks representing the sinusoid are closer to the central DC term, indicating a lower spatial frequency.
The orientation of the sinusoid correlates with the orientation of the peaks in the Fourier image relative to the central DC point.
cns-alumni.bu.edu /~slehar/fourier/fourier.html   (1958 words)

  
 Tektronix MBD: Applications > Waveform Frequency Components   (Site not responding. Last check: )
A harmonic is a sinusoid with a frequency that is an integer multiple of the fundamental.
All periodic waveforms are the sum of a fundamental sinusoid and specific harmonics.
The degree of this distortion is often described by specifying the level of certain harmonics relative to the sinusoid's fundamental frequency.
www.tek.com /Measurement/App_Notes/wfmfreqcomp   (3094 words)

  
 CommsDesign - Using PLLs to Obtain Carrier Synchronization: Part 1
The task of generating a sinusoid with a frequency of Δf Hz is accomplished by the carrier-recovery loop.
The basic problem addressed by a PLL is how to generate a sinusoid that is phase-locked with an externally generated sinusoid of unknown (and possibly varying) frequency and phase.
The goal of this PLL is to produce a locally generated sinusoid y(t) whose instantaneous angle is equal to the instantaneous angle of the received signal x(t).
www.commsdesign.com /showArticle.jhtml?articleID=16500587   (2460 words)

  
 Hann-Windowed Complex Sinusoid
We'll use the Hann window (also known as the Hanning window) which does not have as much sidelobe suppression as the Blackman window, but its main lobe is narrower.
The resulting plot of the Hann window and its use on sinusoidal data are shown in Fig.
The sampled sinusoid is plotted using `*' with no connecting interpolation lines.
ccrma.stanford.edu /~jos/mdft/Hann_Windowed_Complex_Sinusoid.html   (193 words)

  
 815.01 - High Speed Measurements Project
The estimated sinusoid is found by minimizing the average "distance" between the samples and the sinusoid.
The length of each line represents the difference between the nominal (oscilloscope) time at which the measurement was taken and the time as determined by the distorted sinusoidal fit.
2 shows an actual measurement of five sinusoids measured simultaneously with the reference sinusoids that were used to calculate the timebase error.
www.boulder.nist.gov /div815/HSM_Project/Software.htm   (332 words)

  
 Time and Frequency Representation   (Site not responding. Last check: )
The actual sinusoid can be considered to be as existing some distance along the frequency axis away from the time plane.
This distance along the frequency axis is the frequency of the sinusoid, equal to the inverse of the period of the sinusoid.
These two projections mean that the sinusoid appears as a sinusoid in the time plane (time - amplitude axes), and as a line in the frequency plane (frequency - amplitude axes) going up from the frequency of the sinusoid to a height equal to the amplitude of the sinusoid.
www.cage.curtin.edu.au /mechanical/info/vibrations/tut2.htm   (484 words)

  
 Signal Filtering with the MAXQ7654 - Maxim/Dallas
The noisy sinusoid is output on the first DAC in a timer interrupt to ensure that output samples are transmitted at regular intervals.
After the sinusoid data is initialized, the timer is configured to generate periodic interrupts.
One sinusoid is jagged and noisy, while the other sinusoid appears clean, with a slight phase delay due to the length of the FIR filter.
www.maxim-ic.com /appnotes.cfm/appnote_number/3538   (2012 words)

  
 ... DSP by Richard G Baldwin
More specifically, when you multiply two sinusoids, the frequency of one of the sinusoids in the new time series is the sum of the frequencies of the two sinusoids that were multiplied.
For the special case where the two original sinusoids have the same frequency, the difference frequency is zero and one of the sinusoids in the new time series has a frequency of zero.
Since the sinusoids in the time series are stipulated to be cosine functions, when the sinusoid with the matching frequency is multiplied by the sine function, the new time series will consist of a constant value of zero plus a sinusoid whose frequency is twice the frequency of the sine function.
www.dickbaldwin.com /dsp/Dsp00108.htm   (6991 words)

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