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This paper estimates the heterogeneous effects of cooperative membership on smallholder farmers’ financial performance, measured by net returns, return on investment (ROI), and profit margin. We employ an innovative two‐stage predictor substitution model combined with an unconditional quantile regression model to address the endogeneity of the cooperative membership variable and analyze data collected...
In the chemical and industrial field, the technology of detecting flammable or poisonous gases had always been important for product-safety control. Since the most of the work environment is complex and the gas always is complicated mixture, the precision of detection is rather low. IF the advanced pattern recognition and classification technology can be used in this field, we can effectively improve...
This paper introduces the design for a kind of down hole safety information detector which can easily carried by the workers. It can detect the concentration of poisonous gas, alarm when it is danger and it can communicate with supervisory computer by Bluetooth communication module. It can effectively protect personal safety of down hole working staff, so it have good practical value. In addition,...
Model-free control is a non-classical method, it has replaced the traditional design in many areas. This paper introduces the study of Model-Free Adaptive Controller based on the dSPACE real-time simulation system, the model-free adaptive control algorithm has simple structure and can translate a complex non-linear system into a single parameter with time-varying linear system. The specification of...
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