A new type fully reversible combined blade is presented, which can fully reverse airflow during the inverse ventilation by simply reversion. It is suitable for reversible axial flow fans used in tunnel and mine ventil...A new type fully reversible combined blade is presented, which can fully reverse airflow during the inverse ventilation by simply reversion. It is suitable for reversible axial flow fans used in tunnel and mine ventilation. The optimal parameters such as overlap ratio and pitch ratio are determined through cascade experiment. Experiment results also show a big promotion of maximum lift coefficient C1,max and stall attack angle a1,max compared to the existing bi-directional symmetry airfoils.展开更多
This article focuses on the interpretation of heng dao ＇IN~_ （sometimes translated as ＂the constant dao＂） and its fundamental character in the Laozi. It argues against the prevailing interpretation of dao as an u...This article focuses on the interpretation of heng dao ＇IN~_ （sometimes translated as ＂the constant dao＂） and its fundamental character in the Laozi. It argues against the prevailing interpretation of dao as an unchanging metaphysical substance or reality, and maintains that the fundamental feature of heng dao is both dynamic and eternal. Heng dao is beyond language because of its dynamic character, but the Laozi nevertheless strives to express it in three aspects： 1） its flexibility and adaptability as represented in the metaphor of water; 2） its movement of reversal and return; 3） and in its existential significance as a guide for life. Heng dao can be called the non-objectified dao, which produces law, principle, rule, method, and so on. Looked at in this way, the dynamic character of heng dao can be called non-objective.展开更多
文摘A new type fully reversible combined blade is presented, which can fully reverse airflow during the inverse ventilation by simply reversion. It is suitable for reversible axial flow fans used in tunnel and mine ventilation. The optimal parameters such as overlap ratio and pitch ratio are determined through cascade experiment. Experiment results also show a big promotion of maximum lift coefficient C1,max and stall attack angle a1,max compared to the existing bi-directional symmetry airfoils.
文摘This article focuses on the interpretation of heng dao ＇IN~_ （sometimes translated as ＂the constant dao＂） and its fundamental character in the Laozi. It argues against the prevailing interpretation of dao as an unchanging metaphysical substance or reality, and maintains that the fundamental feature of heng dao is both dynamic and eternal. Heng dao is beyond language because of its dynamic character, but the Laozi nevertheless strives to express it in three aspects： 1） its flexibility and adaptability as represented in the metaphor of water; 2） its movement of reversal and return; 3） and in its existential significance as a guide for life. Heng dao can be called the non-objectified dao, which produces law, principle, rule, method, and so on. Looked at in this way, the dynamic character of heng dao can be called non-objective.
