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2.
In the present study, we propose a regression-based scheme for the direct estimation of the height of unknown speakers from
their speech. In this scheme every speech input is decomposed via the openSMILE audio parameterization to a single feature vector that is fed to a regression model, which provides a direct estimation of
the persons’ height. The focus in this study is on the evaluation of the appropriateness of several linear and non-linear
regression algorithms on the task of automatic height estimation from speech. The performance of the proposed scheme is evaluated
on the TIMIT database, and the experimental results show an accuracy of 0.053 meters, in terms of mean absolute error, for
the best performing Bagging regression algorithm. This accuracy corresponds to an averaged relative error of approximately 3%.
We deem that the direct estimation of the height of unknown people from speech provides an important additional feature for
improving the performance of various surveillance, profiling and access authorization applications. 相似文献
3.
Patrick J. Gray Sean D. Conklin Todor I. Todorov Sasha M. Kasko 《Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment》2016,33(1):78-85
This paper reports the effects of rinsing rice and cooking it in variable amounts of water on total arsenic, inorganic arsenic, iron, cadmium, manganese, folate, thiamin and niacin in the cooked grain. We prepared multiple rice varietals both rinsed and unrinsed and with varying amounts of cooking water. Rinsing rice before cooking has a minimal effect on the arsenic (As) content of the cooked grain, but washes enriched iron, folate, thiamin and niacin from polished and parboiled rice. Cooking rice in excess water efficiently reduces the amount of As in the cooked grain. Excess water cooking reduces average inorganic As by 40% from long grain polished, 60% from parboiled and 50% from brown rice. Iron, folate, niacin and thiamin are reduced by 50–70% for enriched polished and parboiled rice, but significantly less so for brown rice, which is not enriched. 相似文献
4.
Fritz Theil Hans Schick Peter Nedkov Monika Bhme Barbara Hfner Sigfrid Schwarz 《Advanced Synthesis \u0026amp; Catalysis》1988,330(6):893-899
Subtilisin DY as well as alkaline protease from Bacillus licheniformis 41 p catalyze the hydrolysis of (1SR, 5RS, 6RS, 7RS)-7-acetoxy-6-acetoxymethyl-2-oxabicyclo[3.3.0]octan-3-one ( rac-1 ) with practically useful enantio- and regioselectivity. Under the hitherto found optimal conditions (1S, 5R, 6R, 7R)-7-hydroxy-6-hydroxymethyl-2-oxabicyclo[3.3.0]octan-3-one ( 4 ), an important intermediate in prostaglandin syntheses, could be prepared in a yield of 16% with an enantiomeric excess of 99%. The enantiomer ( ent-4 ) was obtained with the same enantiomeric excess in 20% yield. The chemical yields are related to the racemic starting material rac-1 . 相似文献
5.
T. Koutzarova S. Kolev I. Nedkov K. Krezhov D. Kovacheva B. Blagoev C. Ghelev C. Henrist R. Cloots A. Zaleski 《Journal of Superconductivity and Novel Magnetism》2012,25(8):2631-2635
We studied the magnetic properties of nanosized Ba2Mg2Fe12O22 powder obtained by citrate auto-combustion synthesis. The powder consists of agglomerates with mean crystallite size of 100?nm. The magnetic properties of the powder were investigated at 4.2?K and at room temperature. The values measured of the magnetization M at a magnetic field of 60?kOe are 22.78?emu/g and 30.47?emu/g at room temperature and 4.2?K, respectively. The magnetic phase transition at 183 K is related to the ferromagnetic-to-spiral spin order and is a precondition for this material??s exhibiting multiferroic properties. 相似文献
6.
M. Kuneva S. Tonchev M. Pashtrapanska I. Nedkov 《Materials Science in Semiconductor Processing》2000,3(5-6)
In the present work, planar waveguides in Y-cut LiNbO3 were obtained using modified proton exchange (PE) conditions of: PE and subsequent annealing (APE), PE in buffered melts (BMPE), APE followed by PE (APE+PE), and PE in vapours (VPE). Benzoic acid was used as the proton source in the PE, BMPE, and (APE+PE) experiments. Cinnamic acid was used for obtaining VPE-waveguides. The main aim was to prevent surface damage of Y-cut crystals due to the strains introduced by proton exchange. The investigations performed showed that the surface etching is probably due to lattice deformation anisotropy leading to higher strains in PE Y-cut samples. Most encouraging results were observed, when an optimized (APE+PE)-procedure was used for waveguide formation. This method is very attractive for the fast preparation of deep high-index and low-loss waveguides in Y-cut LiNbO3. This procedure allows passive and active elements to be produced in one and the same Y-cut substrate of LiNbO3. Similar preliminary results were obtained under VPE conditions. 相似文献
7.
Todor Deligeorgiev Aleksey Vasilev Stefka Kaloyanova Juan J Vaquero 《Coloration Technology》2010,126(2):55-80
One of the most widely used and important groups of functional dyes are the styryl dyes and a review of this functional dye class has not been published for more than 15 years. In this review article, we describe the new trends in the synthesis of a range of novel intermediates and styryl dyes and include the most interesting examples of their high‐tech applications. However, this review is not intended to be comprehensive because of the large number of styryl dye studies that have been carried out in this time. Styryl cyanine dyes are widely used in optical recording media in laser discs, as flexible dyes, laser dyes, as optical sensitisers and in various other fields, for example dye‐sensitised solar cells and dyes with non‐linear optical properties. Additionally, the most important applications for these dyes are in bio‐labelling and in medicinal analysis. 相似文献
8.
Yonka Ivanova Todor Partalin Bojana Tabakova 《Russian Journal of Nondestructive Testing》2011,47(1):57-64
The main purpose of the work is to study the dependence of the ultrasonic wave parameters on the structure state in tubes
of boilers at thermo-electric power station. The changes of the velocity, spectra and attenuation of ultrasonic surface waves
are caused by degradation of the structure and can be used for residual life estimation of the equipment. 相似文献
9.
Arash Koocheki Amir Ghandi Seyed M. A. Razavi Seyed Ali Mortazavi & Todor Vasiljevic 《International Journal of Food Science & Technology》2009,44(3):596-602
The flow properties of ketchup were assessed upon addition of commonly used food thickeners: guar, xanthan and CMC gum at three different concentrations (0.5%, 0.75% and 1%) and four temperatures (25, 35, 45 and 55 °C). The ketchup without supplementation served as a control. All ketchup formulations exhibited non-Newtonian, pseudoplastic behaviour at all temperatures and hydrocolloid levels. The Power-law and Herschel-Buckley model were successfully applied to fit the shear stress versus shear rate data. The flow behaviour indices, n and n' , varied in the range of 0.189–0.228 and 0.216–0.263, respectively. The consistency coefficients, k and k' , were in the range of 8.42–27.22 and 6.56–20.10 Pa s n , respectively. The addition of hydrocolloids increased the yield point (τ0 ) and apparent viscosity of the ketchup in comparison to that of the control. The Arrhenius equation was successfully used to describe the effects of temperature on the apparent viscosity of the prepared formulations. The E a value appeared in the range between 5492.6 and 21475.8 J mol−1 . 相似文献
10.