We report a new time-resolved optical measurement method which combines single photon counting and the spread spectrum time-resolved optical measurement method. A laser diode modulated with pseudo-random bit sequences replaces the short pulse laser used in conventional time-resolved optical systems, while a single photon detector records the pulse sequence in response to the modulated excitatio...

Imaging fluorescence in moving cells is fundamentally challenging because the exposure time is constrained by motion-blur, which limits the available signal. We report a method to image fluorescently labeled leukemia cells in fluid flow that has an effective exposure time of up to 50 times the motion-blur limit. Flowing cells are illuminated with a pseudo-random excitation pulse sequence, resul...

The main focus of this study is the development an adapted complex variable method with respect to equilibrium point in bistable nonlinear energy sink (NES), which mainly investigated vicinity 1:1 resonance. A simplified chaos trigger model established describe distance between stable phase cycle and pseudo-separatrix. An analytical expression can predict excitation threshold for occurrence. re...

As to the complicated characteristics of overhead working truck under effects of random dynamic wind, the traditional method is difficult to reflect its dynamic response in real time, in the study; it proposes the random wind induced vibration response analysis method based on the finite element method and pseudo-excitation method. An it regards the vibration of the fluctuating wind load as coh...

second order advantage of excitation-emission fluorescence matrix was applied for the simultaneous determination of ibuprofen and caffeine. the proposed method is based on the measurement of the native fluorescence and recording emission spectra of ibuprofen and caffeine in different excitation wavelengths. the mixture of these compounds was resolved by multivariate curve resolution coupled wit...

This paper presents a method for an on-chip fast and accurate broadband determination of MEMS behaviour. This technique is based on impulse response (IR) evaluation using pseudo-random Maximum–Length Sequences (MLS). The MLS approach is capable of providing vastly superior dynamic range in comparison to the straightforward technique using an impulse excitation and is thus an optimal solution fo...

The purpose of this work is to identify a linear time-invariant dynamic model of wastewater treatment plants with multilevel pseudo random signals as an excitation input. The plants naturally aim to remove suspended substances, organic material and phosphate. An activated sludge process becomes the best technology available to control the discharge of pollutants. For this purpose, state-space m...

The pseudo-SU(3) model is extended to explicitly include the spin and protonneutron degrees of freedom. A general formalism for evaluating matrix elements of one-body and two-body tensor operators within this framework is presented. The pairing interaction, which couples different irreducible representations of SU(3), is expressed in terms of pseudo-space tensors and a general result is given f...

The dynamic response transfer rate function (TRF) is increasingly used in the field of structural modal parameter identification because it does not depend on white noise assumption excitation. In this paper, interference periodic excitation using TRF analyzed theoretically for a class civil engineering structures with obvious components excitation, and then an method real parameters proposed. ...