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The design of IIR digital filters to magnitude and delay specificationsNicolson, Laurence John January 1993 (has links)
No description available.
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Interpolation techniques for unsupervised deconvolution of FIR and IIR systemsAntonakoudi, Anixi January 2002 (has links)
No description available.
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A Temporal White Noise Analysis for Extracting the Impulse Response Function of the Human ElectroretinogramZele, A., Feigle, B., Kambhampati, P., Aher, A., McKeefry, Declan J., Parry, Neil R.A., Maguire, John, Murray, I.J., Kremers, Jan January 2017 (has links)
Yes / Purpose: We introduce a method for determining the impulse response function (IRF)
of the ERG derived from responses to temporal white noise (TWN) stimuli.
Methods: This white noise ERG (wnERG) was recorded in participants with normal
trichromatic vision to full-field (Ganzfeld) and 39.38 diameter focal stimuli at mesopic
and photopic mean luminances and at different TWN contrasts. The IRF was obtained
by cross-correlating the TWN stimulus with the wnERG.
Results: We show that wnERG recordings are highly repeatable, with good signal-tonoise
ratio, and do not lead to blink artifacts. The wnERG resembles a flash ERG
waveform with an initial negativity (N1) followed by a positivity (P1), with amplitudes
that are linearly related to stimulus contrast. These N1 and N1-P1 components
showed commonalties in implicit times with the a- and b-waves of flash ERGs. There
was a clear transition from rod- to cone-driven wnERGs at ~1 photopic cd.m 2. We
infer that oscillatory potentials found with the flash ERG, but not the wnERG, may
reflect retinal nonlinearities due to the compression of energy into a short time period
during a stimulus flash.
Conclusion: The wnERG provides a new approach to study the physiology of the
retina using a stimulation method with adaptation and contrast conditions similar to
natural scenes to allow for independent variation of stimulus strength and mean
luminance, which is not possible with the conventional flash ERG.
Translational Relevance: The white noise ERG methodology will be of benefit for
clinical studies and animal models in the evaluation of hypotheses related to cellular
redundancy to understand the effects of disease on specific visual pathways.
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The Dynamic Analysis of Taiwan Money Demand Function-Impulse Response Analysis in Infinite Order Cointegrated Vector Autoregressive ProcessesChang, Shien-Lin 19 July 2000 (has links)
none
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Digital waveguide mesh topologies in room acoustics modellingMurphy, Damian Thomas January 2000 (has links)
No description available.
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Contour smoothing in segmented images for object-based compressionAgathangelou, Marios Christaki January 1998 (has links)
No description available.
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Spring and Plate Reverb Techniques In Games / Fjäder och Plate Reverb i SpelHartman, Vile January 2016 (has links)
In games, reverb is used to convey the audial space of game environments. This thesis explores the possibilities of using spring and plate reverb, and if they enhance or detract from the experience compared to a realistic natural reverb. Under evaluation, a quantitative study with a secondary qualitative discussion was carried out where participants played a gameplay prototype that switched between using spring reverb, plate reverb and a realistic natural reverb. A survey was answered relating to the gameplay sequence, which was used to evaluate how players perceived the differences in the different reverbs. The conclusion shows that although spring and plate reverb have different associations and are perceived in a different way compared to a natural realistic reverb, a majority still preferred a natural reverb and felt that spring plate were overall more distracting to the game experience.
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On Statistical Arbitrage: Cointegration and Vector Error-Correction in the Energy SectorNilsson, Oscar, Latim Okumu, Emmanuel January 2014 (has links)
This paper provides methods to select pairs potentially profitable within the frame of statistical arbitrage. We employ a cointegration approach on pairwise combinations of five large energy companies listed on the New York Stock Exchange for the period 27th September 2012 to 22nd April 2014. We find one cointegrated pair, for which we further investigate both short and long run dynamics. A vector-error correction model is constructed, supporting a long run relationship between the two stocks, which is also supported by the mean-reverting characteristic of a stationary linear combination of the stocks. Impulse response functions and variance decomposition are also studied to further describe the interrelation of the stocks, supporting a unidirectional causality between the stocks.
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Design of vibration inspired bi-orthogonal wavelets for signal analysisPhan, Quan 24 July 2013 (has links)
In this thesis, a method to calculate scaling function coefficients for a new bi-orthogonal wavelet family derived directly from an impulse response waveform is presented. In literature, the Daubechies wavelets (DB wavelet) and the Morlet wavelet are the most commonly used wavelets for the dyadic wavelet transform (DWT) and the continuous wavelet transform (CWT), respectively. For a specific vibration signal processing application, a wavelet basis that is similar or is derived directly from the signal being studied proves to be superior to the commonly used wavelet basis. To assure a wavelet basis has a direct relationship to the signal being studied, a new formula is proposed to calculate coefficients which capture the characteristics of an impulse response waveform. The calculated coefficients are then used to develop a new bi-orthogonal wavelet family.
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A Time Series Analysis of Food Price and Its Input PricesRouth, Kari 1988- 14 March 2013 (has links)
Rapid increases in consumer food price beginning in 2007 generated interest in identifying the main factors influencing these increases. In subsequent years, food prices have fluctuated, but generally have continued their ascent. The effects of crude oil, gasoline, corn, and ethanol prices, as well as, the relative foreign exchange rate of the U.S. dollar and producer price indexes for food manufacturing and fuel products on domestic food prices are examined. Because the data series are non-stationary and cointegrated, a vector error correction model is estimated. Weak exogeneity and exclusion tests in the cointegration space are performed. Directed acyclical graphs are used to specify contemporaneous causal relationships. Dynamic interactions among the series are given by impulse response functions and forecast error variance decompositions.
Weak exogeneity tests indicate all eight series work to bring the system back into equilibrium following a shock to the system. Further, exclusion tests suggest crude oil, gasoline, food CPI, ethanol, and food PPI variables are not in the long-run relationships. Dynamic analyses suggest the following relationships. Ethanol price is not a major factor in domestic food prices, suggesting that food prices are largely unaffected by the recent increased use of corn-based ethanol for fuel. Crude oil prices, corn prices, and the relative foreign exchange rate of the U.S. dollar, however, do influence domestic food prices with corn price contributing the most to food price variability. Innovation accounting inferences are robust to potential different contemporaneous causal specifications.
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