coupled zone 中文意思是什麼
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4 heating zones on barrel, all with air - cooling. each zone with multiple rows of copper fins for high cooling efficiency, coupled with oversized cooling fans mounted at the rear of the extruder barrel. large wattage on heaters coupled with the efficient cooling system ensures very fast heating and cooling of each zone
機筒上有4個加熱區域，都帶有空氣冷卻裝置；每個區域含附帶大冷卻風扇的多排銅葉片可獲得高冷卻效果，高功率的加熱模塊同有效的冷卻系統相結合可以確保每個區域的快速加熱和冷卻。 -
The modified model took into account not only the coupled heat transfer of conduction, convection and radiation, but also the heat convection between each zone caused by temperature difference and airflow
該模型綜合了墻體熱傳導、壁面對流熱交換以及內部控制體之間的對流熱交換過程。 -
When the undercooling goes beyond the coupled zone, it is found that the ( pb ) dendrites in the acoustically levitated drops can also appear in the top of the drops and the gravitational macrosegregation is effectively suppressed, which may be caused by the ultrasound and complicated fluid flow inside the drops
發現在小過冷范圍內，由於超聲波的攪拌作用層片共晶組織發生碎斷現象；在大過冷情況下，超聲波可以有效地抑制宏觀偏析的發生。 -
From the situ - observation data of shallow and deep water regions at the coastal zone, it is shown statistically that the occurrency of the coupled ocean waves is more than those of the wind - induced waves and swell. the ratio of the coupled ocean waves at the yangtse river estuary ( especially at shallow sea region ) is nearby 70 % of all the ocean waves, for instance at the observation station dajishan
近岸（淺水）波浪測站和深水的波浪觀測資料統計表明，混合浪的出現均大於純風浪和純涌浪，特別在淺水區域，例如大戟山海洋站，混和浪所佔的比率接近70 。 -
The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system
本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。 -
Lesoult g, catro m, lacaze j. ' physical molding of the solidification of spheroidal graphite irons : revisation of the coupled zone concept, modeling of casting, welding and / advanced solidification processes ( tms ), ed. b. g. thomas, c. beckerman, 1998, 479
王君卿.孫遜.蘇仕方，等.鑄造合金湍流和層流充型與凝固三維數值模擬軟體及其在精密鑄件上的應用.鑄造， 2001 （ 8 ）
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