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for use pesticide threat to the environment, beneficial biological and human with a direct contact, puts forward two level evaluation indexes of pesticide toxicology and pesticide environmental toxicology involved seven secondary evaluation indexes. In different environment with pesticide use, set the weight of pesticide safety comprehensive evaluation, realize the pesticide safety of comprehensive...
This paper analysis the mature E-business model — the concentration of information exchanged E-business model and integrated supply chain E-business model, and emerging P2PEB model. The author comparatively studied the cost of the concentration of information exchanged E-business model and P2PEB model by introducing the theory and method of economics. The result demonstrates the feasibility and the...
Organ phosphorus pesticides (OPs) were first synthesized in large quantities in the 1940's and are now widely used in China. Although OPs can degrade rapidly, they are also highly toxic. Indeed, many cases of poisoning in China, especially from vegetable sources, were attributed to the presence of OPs in large quantities. Even though the use of highly toxic pesticides in vegetables has been banned...
In order to reduce dust concentration and prevent gas accumulation in the underground of coal mine, coal seam water infusion and gas drainage are fundamental measures. Present hole sealing methods are just for one purpose, which makes both too many holes quantities and waste of sealing materials. A new hole packer of center-through rubber self-expandable hole packer by water pressure was developed...
To solve those traffic accidents during conscious lane change of vehicles on highway under dangerous conditions, a new safety lane change model is established on the basis of the lane departure warning system which Jilin University has developed. This model is studied under a typical scenario on highway, and also considered with the actual driver behavior that most vehicles always accelerate during...
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