Under optimal experimental conditions,there is a linear decrease of the catalytic efficiency in two CEA concentration ranges from 1.0 to 6.0 μg/L and 6.0 to 138 μg/L,respectively. The detection limit is 0.4 μg/L and with intra-assay RSD of 7.4% and inter-assay RSD 11.2% at 50 μg/L CEA concentrations.
By means of enlarging the input components to the range of [0, 6.0] and transforming the standard sigmoid activation functions to be f(x)= 3(1+ exp(-x/3)-1, the learning speeds of MLPs are sped up. The experiment for simultaneously estimating the classes and concentrations of 4 kinds of fragrant materials, namely ethanol, ethyl acetate, ethyl caproate and ethyl lactate in different concentrations, shows that the proposed method is quite effective.
Applications to the Law of ultraviolet fluorescence monitoring concentrations of sulfur dioxide, sulfur dioxide concentration measurement study ultraviolet fluorescence law principles.
Primarily on the concentration of sulfur dioxide measurements ultraviolet fluorescence law principles, ultraviolet fluorescence measurements of sulfur dioxide concentrations law system structure and design.
Optical Tweezers-based Immunosensor for Detection of Femtomolar Concentrations of Antigens
The obtained results have shown that the maximum phase difference caused by the concentration change of the solution was 41.2 rad and the corresponding change of solution′s refractive index was 0.0021 while the electrochemical reaction was at 1.6 s.
Results:Basing response surface confirmed that when the concentration of glutaradehyde was 2.5%,PBS pH was 7.4,the concentration of BSA was 0.5%,the time of immunoreaction was 40 min,the Signal-to-Noise got to biggest,and the result was closed to prediction.