interval-zone 中文意思是什麼
interval-zone
解釋
間隔帶-
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。 -
It is also shown that all the signals in the closed - loop are bounded and the resultant tracking error lies within the confined dead - zone, by which the complete tracking over a pre - specified time - interval is achieved
提出初始修正吸引子的概念，構造的時變死區含這種初始修正吸引子，以使得閉環系統在給定時間區間上可實現完全跟蹤。 -
Based on the content of each important stage of the optimum design on anti - slide pile, this paper discusses several key problems for optimum design on anti - slide pile, such as the choice of intensity parameter of the sliding zone, confirming the pile position, pushing force design, the pile interval and the anchoring depth, and then presents some methods for solution
依據抗滑樁優化設計工作中各重要環節的工作內容，對滑帶土強度參數的選擇，抗滑樁位置和設計推力、抗滑樁問距、錨固段長度的確定等影響抗滑樁優化設計的關鍵技術問題進行了討論，提出解決這些問題的方法。
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