The term " pesticide residue" refers to a trace amount of pesticides remaining in organisms, agricultural products (or foods) and the environment after use of pesticides. In addition to pesticides, it also includes toxic metabolites and impurities of pesticides. It i ...more...

Thin film structure surface expansion algorithm based on spring particle system To flatten the diaphragm of the space to the plane, to obtain a two-dimensional diaphragm, it is first necessary to define a space on the selected plane and the space diaphragm has the same in the parameter domain an ...more...

The guide sleeve is an important part in the hydraulic support of the coal mining machinery industry. The hydraulic cylinder piston and the guide sleeve are a pair of friction pairs. If the dimensional accuracy is not high, the piston will cause friction due to friction and wear during long-term re ...more...

The breeding of lactating sows is the most complicated and important part of the production of pig farms, because the performance of lactating sows directly affects the growth and survival rate of piglets, which is the key to good results. However, in production, lactating sows are often over-fat o ...more...

1. Analysis of the spiral lower knife During the spiral lowering process, the tool travels along a spiral on a cylinder surface as shown in the drawing. When the tool is continuously running, the projection of the annular region formed by the rotation of the end edge on the bottom surface and the ...more...

Scientific application of pesticide technology is the guarantee of prevention and treatment. Only when pesticides are used strictly in accordance with the operating procedures can the ideal control effect be achieved. What are the five gold codes for pesticides? Here are the i ...more...

The China Market Research Center is a former subsidiary of the National Bureau of Statistics. It processes the statistical industry data of the National Bureau of Statistics and the national customs import and export data processing; and searches the UN database data, uses a mathematical m ...more...