摘要:

A precise expression for the relationship between measured time interval, Δt, and sample concentration,C0, in continuous flow injection titration has been presented. The expression reads:

ISSN:0003-2719    

DOI:10.1080/00032719608001007

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The theoretical plate number, capacity factor, peak assymetry and separation factor of an alumina high-performance liquid chromatographic column were determined using nonylphenyl ethylene oxide oligomers as solutes and eluents containing n-hexane, dichloromethane, dioxane, tetrahydrofuran, chloroform and ethyl acetate. The relationship between the chromatographic characteristics and physicochemical parameters of the stronger component in the eluent was calculated by multivariate mathematical-statistical methods. It has been established that each solvent influences differently the chromatographic characteristics. The best separation was achieved by using n-hexane - dichloro-methane eluent. Calculation proved that the dielectric constant, dipole moment and the bulkiness of the solvent molecule have the highest impact on the separation capacity of the alumina column.

ISSN:0003-2719    

DOI:10.1080/00032719608001008

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The partial projections of a sample set to the PLS (partial least square) space with a less noise is used as the input elements of the BPN (back propagation network) to build a “balance” neural network structure, which circumvents an overfitting shortcoming of the usual BPN to a great extent. The samples designed from an optimal region of the PLS sub-space using a nonlinear inverse mapping technique are predicted by the PLS-BPN and are selected based on their predicted target values. This method is applied to hydrogen-storage-battery materials and several samples with a probable better initial capacity are designed.

ISSN:0003-2719    

DOI:10.1080/00032719608001009

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

ISSN:0003-2719    

DOI:10.1080/00032719608000996

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor