Abstract:An intelligent yield monitor for grain combine harvester was developed. The harvested crop was wheat, and the harvesting combine used to equip the monitor was JL1065, a typical machine with 4-meter swath width in northern China. The monitor can collect four analog signals, grain flow, grain moisture content, grain temperature, and header up/down signal, and two digital signals, ground speed and elevator speed. Two digital signals were sensed by Hall effect elements. The monitor can also synchronously receive DGPS signal. A liquid crystal display and a touch screen were integrated as an I/O interface. Field tests showed a linear relationship between actual yield and the output of the yield monitor. The error between measurement and prediction was less than 3%. It is concluded that the developed intelligent yield monitor is practical.
Granites are nearly absent in the Solar System outside of Earth. Achieving granitic compositions in magmatic systems requires multi-stage melting and fractionation, which also increase radiogenic element concentrations. Water and plate tectonics facilitate these processes on Earth, aiding in remelting. Although these drivers are absent on the Moon, small granite samples have been found, but details of their origin and the scale of systems they represent are unknown. We report microwave-wavelength measurements of an anomalously hot geothermal source that is best explained by the presence of a ~50 km diameter granitic system below the thorium-rich, farside feature known as Compton-Belkovich. Passive microwave radiometry is sensitive to the integrated thermal gradient to several wavelengths depth. The 3-37 GHz antenna temperatures of the Chang’E 1 and 2 microwave instruments allow us to measure peak heat flux of ~184 mWm^-2; ~20 times higher than the average lunar highlands. The surprising magnitude and geographic extent of this feature imply an Earth-like, evolved granitic system larger than believed possible on the Moon, especially outside of the Procellarum region. Furthermore, these methods are generalizable: similar uses of passive radiometric data could vastly expand our knowledge of geothermal processes on the Moon and other planetary bodies.
This paper puts forward a new perspective of environmental protection to guide, promote and realize the sustainable development of human and environment based on the fact that the earth's resources are limited. The concept of "the minimization principle of negative effect on environment" that human activities should follow is given and explained. Three methods for advocacy and implementation are analyzed, including the generalization and guidance of the new perspective of citizen's life and environmental protection, the advocacy practice of social groups, and the guarantee and promotion of national laws and regulations. This paper also discusses several specific concepts and approaches of the new perspective of environmental protection, including low carbon lifestyle, population development and the environment bearing capacity matching, humans living mode optimization, work mode change, traffic adjustment, arms control, the rationalization of economic development speed, waste control, rational adjustment of the gap between the rich and the poor, and the application of the principle of prudence in the development of science and technology, etc. The study believes that when the new perspective of environmental protection is deeply rooted in the mind and transformed into a long-term conscious action of the human beings, the sustainable development of human and environment could truly become a reality.
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