Method for percentile classification of raw silk quality

Abstract

The invention discloses a method for percentile classification of raw silk quality. The method includes the step (1) of constructing an on-line raw silk quality database, and periodically importing, by a raw silk detection mechanism, raw silk quality data and identification data into the database; the step (2) of utilizing a percentile statistical method in the database to automatically sort the imported quality data from small to large, and then statistically collecting the quality data corresponding to commonly used N percentiles by the database; taking the N quality data obtained in the step (2) as grading indicators, and dividing the raw silk quality into N+1 grades. In the method, the database percentile method is adopted for classification, real-time statistics and classification ofall data or statistics and classification according to conditions can be achieved, users can formulate classification conditions as required, the classification can be refined and can also be coarsened, and the non-constant-value percentile classification can help to reach an international consensus, effectively avoiding disputes on grading indexes of a constant value classification method.

Description

technical field [0001] The embodiment of the present invention relates to a raw silk quality percentile grading method. Background technique [0002] Raw silk of different quality grades has a large price difference. According to incomplete statistics, the highest price difference per ton of silk can reach tens of thousands of yuan. Therefore, in order to reduce trade disputes, raw silk is traded according to quality. [0003] There are existing raw silk quality percentile grading methods, the basic situation is as follows: [0004] Raw silk is graded using fixed technical index values, that is, using fixed upper limits, fixed lower limits, or fixed upper and lower limits of inspection items for grading. The current grading methods include: my country's standard GB / T 1797-2008 "Raw Silk", "Raw Silk Handbook 1995" formulated by the International Silk Association, and the raw silk standards of Japan, India and other countries. Among them, GB / T 1797-2008 "Raw Silk" divides ra...

AI Technical Summary

Problems solved by technology

[0006] (1) The fixed limit value method has the following disadvantages: when the overall average quality of raw silk changes greatly, all raw silk will be in the same 2-3 grades, and other grades will lose their meaning

The level of specific indicators of a certain item cannot be directly reflected, especially the current grading methods for subsidy inspection items such as uniform three-dimensional change, breaking strength, elongation at break, cohesion, and cutting are relatively rough

[0009] (3) In addition, the current raw silk grading method does not classify the new inspection items of raw silk

Due to the lack of grading standards, it is difficult to promote new inspection items