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Development of Female Torso Classification and Method of Patterns Shaping

Wu X., Kuzmichev V., Peng T.

Autex Research Journal

2018

Vol. 18, no. 4

419--428

Our study presents a new pattern-making approach that is composed of three major steps: to establish the new torso classification; to improve the pattern shaping method; to solve the problem of misfit of female dresses. New additional measurements were obtained from full bust, waist and hip circumferences and divided between front and back parts separately from 3D body scanning data. By creating 8 new torso subtypes Y1, Y2, A1, A2, B1, B2, C1, and C2, which reflect the body characteristics and torso morphology through distribution of bust girth between the front and the back, we have developed the Chinese female torso classification. On the basis of the new classification and the Japanese method of pattern block drafting, we improved the method of calculation of waist darts and the shaping of two kinds of female dresses: first kind doesn’t have the horizontal waist seam (one-piece dress) and second kind has the waist horizontal seam (two-pieces dress containing from the top and the skirt). The new torso subtypes and new pattern block shaping approach are taken into attention as the body characteristics will significantly improve the quality of clothes. New method of pattern pieces shaping in according with the characteristic features of a 3D virtual avatar allows to integrate this virtual pattern-generating approach into the pattern-making systems.

Beneficial effects and mechanism of lead ion on wolframite flotation

Yang S., Qiu X., Peng T., Chang Z., Feng Q., Zhong C.

Physicochemical Problems of Mineral Processing

2016

Vol. 52, iss. 2

855--873

In this study the effects and mechanism of lead ions influence on wolframite flotation with benzohydroxamic acid (BHA) were studied through micro-flotation, adsorption experiments, zeta potential measurements, logarithmic concentration diagram, and X-ray photoelectron spectroscopy. It was observed that lead ions could significantly enhance the recovery of wolframite in flotation and adsorption density of collector BHA onto the wolframite surface. The results showed that Pb existed in the forms of lead ion, monohydric lead, and lead hydroxide at the water-wolframite interface respectively, at three pH ranges. They increased the zeta potential of wolframite. However, the zeta potential of wolframite was still negative, resulting in repulsive electrostatic force to anionic collector BHA. Combining with XPS spectra, it revealed the chemisorption of BHA onto the wolframite surface. In addition, PbO or Pb(OH)2 was observed on the wolframite surface due to the reaction between lead ions and wolframite. These reaction products increased the adsorption site of BHA on the wolframite surface because Pb-hydroxamate was found on the wolframite surface.