plane ground中文什么意思
接地面
- plane: n. 平刨；镘。 a jack pl ...
- ground: ground2 n. 1 ...
- ground plane: (透视画中的)地平面。
例句与用法
- Technical specifications of plane grinding machine
平磨仪技术条件 - Grinding wheel : classified as surface grinding wheel , inclined plane grinding wheel , internal hole grinding wheel and edge grinding wheel
研磨砂轮：分为平面研磨轮斜面研磨轮内孔研磨轮及刃口研磨轮等。 - Mobile keyboard keys around , jumping on the keys , keys damage , according to a continuous bond created or restored plane ground , 2 , 3 keys to create or repair ramps ground
键盘左右键移动，上键跳跃，下键破坏，连续按1键创建或修复平面地面， 2 3键创建或修复斜面地面。 - The plane you will take take off at 9 colok in the morning and reatch at nuyork about three colock in the afternoon , so you must reach at the plane ground ahead about half and one hour
您搭乘的飞机是早上9点起飞，下午三点抵达纽约，您必须在飞机起飞前至少一个半小*抵达机场。 - 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
本文从麦克斯韦旋度方程出发，建立了笛卡儿坐标下无源空间中均匀无耗媒质的fdtd基本方程和圆柱坐标下无源空间中均匀无耗媒质的fdtd基本方程，详细讨论了fdtd法计算中时间步长和空间步长的选取原则以及激励源的类型和设置；推导了mur一阶和二阶边界条件在圆柱坐标下的差分格式；给出了在用fdtd法计算天线的远场辐射特性时必需采用的频域和时域近场远场变换技术；最后用fdtd法计算了平面微带缝隙天线、柱面共形微带缝隙天线和柱面共形微带层叠天线的输入阻抗和远区辐射场，并分析了天线的一些参数的变化对天线输入阻抗的影响，得出了一些有用的结论。
