At present, fresh agricultural products have begun to take the scale of industrialization, the majority have been in full accordance with high yield and high quality, efficient and safe production requirements, but due to the characteristics of fresh agricultural products, more and more attention have been aroused, the traditional marketing model is facing a bottleneck, the various aspects of n...

A simplified method for the determination of benzylaminopurine in agricultural products by LC/MS was investigated. Benzylaminopurine in agricultural products was extracted with acetone and the extract was concentrated to below 30 mL. Buffer solution of pH 9.0 and ethyl acetate were added to the residue, and the solution was shaken. The ethyl acetate layer was evaporated to dryness, and the resi...

The food that we eat is uniform neither in shape or appearance nor in internal composition or content. Since technology became increasingly important, the presence of biological variance in our food became more and more of a nuisance. Techniques and procedures (statistical, technical) were developed. The most widely used are sorting or grading on large-scale operations. Statistical rules were d...

Variability of weed infestation needs to be assessed for site-specific weed management. Since manual weed sampling is too time consuming for prctical applications, a system for automatic weed sampling was developed. The system uses bispectral images, which are processed to derive shape features of the plants. The shape features are used for the discrimination of weed and crop species by using a...

To solve problems in detecting the origin of agricultural products, this paper brings about an embedded data-based terminal, applies middleware thinking, and provides reusable long-range two-way data exchange module between business equipment and data acquisition systems. The system is constructed by data collection node and data center nodes. Data collection nodes taking embedded data terminal...

Based on the colour development of tomatoes (theoretical) and apples (measured) as an example the approach to biological variance from a new perspective is made more clear and more explicit. The origin of biological variance is traced back to the stage of maturity at the moment of harvest. By modelling the colour development of individual units in a batch in a generic fashion, and using this mo...

taking advantage of the new technology, supply chain has already created a chain of cooperation among its own companies, and, in a larger scale, within a universal environment. superior to these technologies is rfid which is an abbreviation for radio frequency identification. rfid is one of the most advanced technologies in the contemporary world. perishable products and hose with short time ex...

The packing chromatic number χρ(G) of a graph G is the smallest integer k such that there exists k-vertex coloring in which any two vertices receiving color i are at distance least i+1. In this short note, we present upper and lower bound for lexicographic product G∘H graphs H. Both bounds coincide many cases. particular, happens if |V(H)|−α(H)≥diam(G)−1, where α(H) denotes independence