In this paper,We introduce the basic properties about heredity of positive definite property of revised matrix {B k}or{H k}and the conjugation of the iterative direction generated by the Broyden algorithm family.

Study on the Diffusivity of Sodium Alginate-Chitosan-Powder Active-carbon Bio-microcapsule;

In this work, using these subjects as the low molecule models, and a series of poly(ethylene glycol)s (PEG) of different molecular mass as the high molecule models to study the molecular mass cut-off(MMCO) the diffusivity of chitosan/alginate microcapsules were investigated.

The transfer characteristic of human visual system and models;

The current design methods of fixtures were discussed in this paper, and the influence of materials, manufacturing process and fixture styles on the stress transfer characteristics of the fixture were also pointed out.

This article studies the vertical vibration transfer characteristics of commercial vehicle seats.

Application of GRNN in predicting heat permeability of the fabric;

Based on the transmission character of sound wave,the transmission process and function of sound wave are further analyzed.