The vast highways network in China is moving from the phase of POWER MIX BASE construction to the phase of maintenance, and with the introduction of new technique of perpetual pavement in last decade, it is necessary to consider recycling as one of the promising solutions for rehabilitation of old asphalt concrete pavement and ultimately to convert
In view of status of serious exterior ventilation leakage of auxiliary inclined air returning shaft used for staff and material transportation in Fengchishan Coal Mine, wind meter direct measuring method was used to test mine exterior ventilation leakage of selected test points, winch rope access window of explosion-proof ventilation door was deter
To clarify the factors responsible for the maintenance of a high rate of photosynthesis at the ripening stage in the high-yield rice cultivar Akenohoshi, as compared with that in a Japanese standard cultivar, Nipponbare, we investigated the nitrogen content of leaves, focusing on the accumulation and the partitioning of nitrogen in rice plants.The
Theoretical models aimed at explaining the evolution of honest, informative begging signals employed by nestling birds to solicit food from their parents, require that dishonest signalers incur a net viability cost in order to prevent runaway escalation of signal intensity over evolutionary time.Previous attempts to determine such a cost empiricall