旋圓兩半結 的英文怎麼說
中文拼音 [xuányuánliǎngbànjiē]
旋圓兩半結
英文
round turn and two half hitches-
Examination shows that the heart of andrias davidianus have three chamers - two atria and one ventride, the atria on the left of midline, the ventricle on the right of midline, and the atria are divided into two cavities by septum interatriale. there are four valvula semilunaris in conus arteriosus, but no spiral valve in conus arteriosus. the coronary artery is made by arterica carotis externa branches
研究結果表明,中國大鯢循環系統解剖學特點為: 1 .心臟:心房心室為左右排列,兩心房前後排列,共有4對動脈弓,其中第二、三對動脈弓匯合成一條背主動脈;動脈圓錐基部與心室相接處有4個瓣膜,動脈圓錐內沒有螺旋瓣,動脈圓錐與腹側主動脈干之間有3個半月瓣;房間隔有穿孔;冠狀動脈由頸外動脈的分支匯合而成。This paper studies the least redundant solutions of two - dimensional array system by using the simulated annealing algorithm. two ideal thinning solutions for the two - dimensional circle array were discussed intensively in this paper. one solution uses half - circle configuration with very much reduced number of elements and taking an image by rotating the array ; the other selects element positions around the full circle to provide a roughly uniform coverage in the spatial frequency domain
在一維天線陣設計的基礎上,本文利用模擬退火演算法給出了兩種最小冗餘二維圓環天線陣的結構設計方案,一種方案利用天線旋轉,在半圓周內稀疏天線;另一種方案通過將空間頻率采樣點的均勻分佈作為優化的約束條件,在全圓周上使天線單元分佈達到最優。
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