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Comparative Study of foF2 during Quiet Geomagnetic Activity with URSI and CCIR Predictions during the Phase Minimum of Solar Cycle 22
《Journal of Applied Mathematics and Physics》2022年第12期3562-3571,共10页Moustapha Konaté Abidina Diabaté Kadidia Nonlo Drabo Emmanuel Nanéma Frédéric Ouattara 
This paper investigates the performance of the latest International Reference Ionosphere model to predict the critical frequency at low latitudes in the African region. The variability of the critical frequency of the...
关键词：FOF2 IRI IONOSONDE Quiet Time Periods Solar Cycle Phase Minimum 
Quiet Zone Design in Diffuse Fields Using Ultrasonic Transducers
《Journal of Applied Mathematics and Physics》2015年第2期247-253,共7页Wen-Kung Tseng 
This paper presents quiet zone design using ultrasonic transducers for local active control in pure tone diffuse fields. Most of researches in local active noise control used conventional loudspeakers for the secondar...
关键词：QUIET ZONE DESIGN Ultrasonic Transducers Local Active Control DIFFUSE FIELDS PLANE Wave 
Aerodynamic Design of the Bleed Slot in a Hypersonic Quiet Nozzle
《Journal of Applied Mathematics and Physics》2014年第6期437-442,共6页Ruiqu Li Junmou Shen Feng Ji 
The bleed slot is necessary for the requirement of the hypersonic quiet flow all over the world. The aim of the bleed slot is to decrease the influence of the disturbances from the contraction of the quiet nozzle to t...
关键词：HYPERSONIC QUIET NOZZLE Bleed SLOT BOUNDARY LAYER 
Aerodynamic Optimization of the Expansion Section in a Hypersonic Quiet Nozzle Based on Favorable Pressure Effect
《Journal of Applied Mathematics and Physics》2014年第6期443-448,共6页Jian Gong Dapeng Yao Xunhua Liu 
Maximum expansion angle is the primary parameter for the design of expansion section of hypersonic quiet nozzle. According to the quantity of maximum expansion angle, expansion section could be classified as fast expa...
关键词：QUIET NOZZLE MAXIMUM EXPANSION ANGLE Favorable Pressure Effect 
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