Visual comparison analysis method and system for multi-region MRL standards

Abstract

The invention discloses a visual comparison analysis method and system for multi-region maximum residue limit (MRL) standards. An agricultural product classification tree is constructed by adopting MRL standard data from top to bottom, and correlation comparison analysis, detail comparison analysis, index evaluation comparison analysis and overall comparison analysis are achieved in combination with an interactive technology. The system comprises a user interaction module, a user exploration module, an index calculation module and an index visualization module. LPM indexes include a classification hierarchy number L of agricultural products, a related pesticide number P and a record number M of pesticide limit values in a data set, the LPM indexes are quantitatively calculated through weighting, and the accuracy of comparison analysis is improved; by adopting a nested circle, a radar chart, a parallel coordinate and tag cloud, a polyline-column chart and the interactive technology, thedifference in the strict degree of determining the classification conditions of the agricultural products and the coverage range of the MRL standards of the agricultural products at different regionsis quickly discovered. The visual comparison analysis method and system for the multi-region maximum residue limit (MRL) standards can also be used for visual comparison analysis in other applicationfields of multi-dimensional hierarchical data.

Description

technical field [0001] The invention belongs to the technical fields of information visualization and food safety, and mainly relates to a comparative visual analysis method and system of multi-country, multi-region and multi-organization (hereinafter referred to as multi-region) MRL standards. Background technique [0002] The maximum limit of pesticide residues (Maximum Residue Limits, referred to as MRL) refers to the legal maximum allowable concentration of pesticide residues in certain agricultural products, calculated in milligrams of pesticide residues per kilogram of agricultural products (mg / kg). An MRL standard record refers to the maximum limit value of a pesticide in a certain agricultural product. To a certain extent, the MRL standard reflects the level of management of pesticide use in a country, region, or organization. Mainland China, Hong Kong, the United States, Japan, the European Union (hereinafter referred to as EUR) and the International Codex Alimenta...

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Problems solved by technology

[0006] (4) There are differences in the maximum residue limits of the same pesticide in the same agricultural products in each country or regional organization. For example, the limit value of diazinon pesticide in spinach is 0.01mg / kg in EUR, 0.1mg / kg in Japan, and 0.1mg / kg in China. 0.5mg / kg in mainland China, 0.5mg / kg in CAC, 0.7mg / kg in the United States, and no maximum limit for this pesticide residue in spinach is given in Hong Kong, China

[0007] Due to the multi-regional MRL standard data has the characteristics of multiple dimensions, discrete distribution of attribute values, and complex hierarchical structure, it is not suitable to use different visual coding methods to express different attributes. First, the visual coding methods are limited; second, too complex visual coding Can cause visual confusion to the user and reduce the readability of the visualization scheme

The traditional tree structure can only compare a single attribute, and cannot combine multiple attributes for comprehensive comparison; when the data structure is complex and the scale is large, the number of nodes in the tree increases exponentially with the increase of depth, resulting in off-root Nodes far away are prone to overlap, and it is inefficient to use pure manual comparison

In addition, in the field of food safety, there is currently no comparative visual analysis method and system for multi-regional pesticide residue limit MRL standards

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