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BACKGROUND
Bt cotton expressing Cry1Ac can efficiently control Helicoverpa armigera, but field‐evolved Bt resistance reduces its efficacy. Susceptibility of H. armigera field populations to Cry1Ac protein has been monitored since Bt cotton was commercialized in 1997 in China. Here we report the results of our continued monitoring from 2005 to 2017 to provide important guidelines for sustainably growing...
Based on analysis on the physical nature of dust precipitation using optimal electric spark rate and some problems relating to dust removing effects, high consumption of electric power and steel material, this article brings forward the query on its sustainable development. Finally this article points out that dust precipitation using direct current supply with extra wide polar distance is the solution...
In terms of safety for landing taxiing control of high-speed unmanned air vechicles (UAVs), key safety-critical factors were first. A generic taxiing control logic was put forward, incorporating the concerned factors. For further verification, a nonlinear mathematic model was deduced with high accuracy for ground motion simulation, incorporating the characteristics of undercarriages, brake, nose wheel...
Admission control plays an important role in OFDMA system. However, admission control becomes rather complex along with the increase of users' demand and the diversification of service types, so building an appropriate stochastic model is especially significant. The Petri net can distinctly describe the stochastic process. In this paper we build and analyze the Petri net model of admission control...
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