The viscoelastic properties of lamellar liquid crystal, formed by non-ionic surfactant, were studied with small amplitude oscillation frequency sweep, and the effects of surfactant concentration, temperature , AgNO3 and as-produced Ag on them were investigated.

A new method, MPR frequency scanning technique, is used to characterize the film-on-substrate system. The numerical multiparameter estimation is performed using the frequency response of MPR signals.

A novel time_resolved two_photon excitation fluorescence spectroscopic system based on a high repetition rate streak camera and capable of simultaneous measurement of fluorescence spectrum and lifetime of the samples is presented.

The high resolution spectra are measured tuning the length of a CO2 waveguide laser by means of a PZT yielding a frequency scan of 230 MHz around the CO2 laser lines.

Our frequency scan data, as well as our data for the time course of resistance and capacitance, show that the fast change is associated with both the under-the-cells and between-the-cells resistance.

The high sensitivity of the intracavity arrangement allowed very strong double-resonance and two-photon transition signals to be observed with high microwave-frequency scan-rates (1 GHz/min), and low microwave pumping powers (≦10mW/cm2).

In this way an idler frequency scan of 100-150?GHz could be obtained, after which the signal frequency hops ahead over the FSR of the intracavity etalon of the OPO (207?GHz).

Low noise, mode-by-mode absorption spectra are recorded at a high acquisition rate (laser frequency scan greater than 400?GHz/s) and covering four orders of magnitude in absorption coefficient.

Fatigue crack growth rate test using a frequency sweep method

Fatigue crack propagation characteristics of a diesel engine crankshaft are studied by measuring the fatigue crack growth rate using a frequency sweep method on a resonant fatigue test rig.

A novel criterion for the thermorheologically simple material, and a procedure to calculate the shift factor from the angular frequency sweep and temperature ramp data were presented.

Various dynamic mechanical tests (strain sweep, frequency sweep, and time sweep) were performed to estimate viscoelastic characteristics and fatigue behavior.

Active head oscillations were performed at four discrete frequencies (0.12, 0.32, 0.80, 2.0 Hz) and over a frequency sweep between 0.1 and 2.0 Hz.

In the second case, the Brewster reflection conditions are not realized, and the variations in the intensity of the reflected light observed upon frequency scanning are smaller.

A diplexer of this type can be used for discrete frequency scanning of high-power wave beams in systems for the suppression of the hydrodynamic instabilities of plasma in magnetic traps.

Amorphous carbon films were examined by low frequency scanning-probe acoustic microscopy (LF-SPAM).

Our results showed that the low frequency scanning-probe acoustic microscopy is a useful method for imaging subsurface defects with high resolution.

Frequency scanning of the laser is provided by acoustooptic modulation.

One of the characteristic features of the metil claded dielectric waveguides different from the simple dielectric waveguides is that the former can excite guided waves with effective mode index N<1, which has the propagation constant less than the wave-number of the light in vacuum: ?/c. Authors measured directly the dispersion properties for N>1 and N<1 modes in the metal claded dielectric waveguides by the frequency scanning ATR method. The experimental results are in agreement with the theoretical calculations....

One of the characteristic features of the metil claded dielectric waveguides different from the simple dielectric waveguides is that the former can excite guided waves with effective mode index N<1, which has the propagation constant less than the wave-number of the light in vacuum: ?/c. Authors measured directly the dispersion properties for N>1 and N<1 modes in the metal claded dielectric waveguides by the frequency scanning ATR method. The experimental results are in agreement with the theoretical calculations. It is found that the coupling efficiency through the prism coupler to the metal claded dielectric waveguide is depending on the thickness of the metal coupling layer.The coupling efficiency reaches to the maximum when the thickness of the coupling layer is about 130A. The thickness of the coupling layer will influence the mode index of the waveguide owing to the slight changes of the dielectric constant of the coupling layer versus its thickness during their evaporation deposition in a vacuum coating system.

This paper deals with study of period-doubling bifurcation and chaotic behavior under the control of freqency. All structure of bifurcation and chaos can be shown on the V0-ω parameter plane by the method of frequency sweeping. The normal and inverse bifurcation sequences are fully symmetric. On the plane of the control parameters there is a point where the values merge to a unique value. The proposed method is simple and fast, and can be used to study the behavior of the chaotic dynamic systems. Not only can...

This paper deals with study of period-doubling bifurcation and chaotic behavior under the control of freqency. All structure of bifurcation and chaos can be shown on the V0-ω parameter plane by the method of frequency sweeping. The normal and inverse bifurcation sequences are fully symmetric. On the plane of the control parameters there is a point where the values merge to a unique value. The proposed method is simple and fast, and can be used to study the behavior of the chaotic dynamic systems. Not only can it be used to measure quantitatively the values of the convergence ratio (?) and the rescaling factor (?) , but also to observe qualitatively some periodic windows which exists in the chaotic bands, as well as intermittent chaos. Bifurcation and chaos are the frequency response of the nonlinear systems.

The frequency scanning range of the cw ring dire laser has the maximum value △λ_(s max) and the minimum value △λ_(s min). △λ_(s max) is the free spectral range of the scaning Fabry-Perot etalon, △λ_(s min) is related with the matching degree of the all frequteney selectors in the ring cavity.