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In order to increase the recognition accuracy under different speaking manners and different channels, the paper introduces joint factor analysis into the recognition system by training speaker and channel space. Then based on analyzing distribution of the channel factor by principal component analysis method, vector quantization algorithm is proposed by the paper to achieve the optimal channel space...
A novel chitosan/attapulgite (CTS/APT) composite adsorbent was prepared. Adsorption experiments were carried out as a function of types of adsorbent, ratio, contact time, pH, temperature. It was found that the adsorption capacity of Ni2+ on composite adsorbent was the highest. The composite adsorbent had the highest adsorption efficiency when the ratio was 30 wt%. The adsorption of Ni2+ reached equilibrium...
Biosorption of Acid Red from aqueous solutions by peanut shell as a low-cost biosorbent was investigated as a function of initial pH, initial biomass concentration. The kinetics and equilibrium of biosorption were examined in detail. Three kinetic models (pseudo-first order, pseudo-second order, and internal diffusion order model) were used to connect data and to determine the kinetic parameters....
Response surface methodology (RSM) was taken to enhance the production of low-temperature-active phytase from the strain Kurthia CZC0806 which was isolated from the Yellow Sea in China. The Plackett-Burman and Box-Behnken design were applied to optimize the fermentation medium components of the strain. Peptone, saccharose and NaCl were selected as the most significant factors, based on the Plackett-Burman...
According to the millimeter wave propagation characteristics in turbulent environment, this paper has made modifications to the previous model, turned the previous atmospheric refractive index structure constant in turbulent environment-----one of the most important parameters, which varies with the height function, into wind speed difference function. It also probes into the relationship between...
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