極低空目標 的英文怎麼說
中文拼音 [jídīkōngmùbiāo]
極低空目標
英文
extremely low-altitude target- 極 : i 名詞1 (頂點; 盡頭) the utmost point; extreme 2 (地球的南北兩端; 磁體的兩端; 電源或電器上電流...
- 空 : 空Ⅰ形容詞(不包含什麼; 裏面沒有東西或沒有內容; 不切實際的) empty; hollow; void Ⅱ名詞1 (天空) s...
- 目 : Ⅰ名詞1 (眼睛) eye 2 (大項中再分的小項) item 3 [生物學] (把同一綱的生物按彼此相似的特徵分為幾...
- 標 : Ⅰ名詞1 [書面語] (樹梢) treetop; the tip of a tree2 (枝節或表面) symptom; outside appearance; ...
- 目標 : 1. (對象) target; objective 2. (目的) goal; aim; destination
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High frequency surface - wave radar ( hfswr ) utilizes the surface - wave mode of vertical polarization electromagnetic wave propagation over sea water to detect targets of ships and aircrafts at distance beyond the line of sight
高頻地波雷達( hfswr )依靠高頻垂直極化電磁波沿海洋表面繞射傳播的機理,實現對海面艦船目標和低空飛行目標的超視距探測。The purpose of studying the structure - activity relationship ( sar ) of vitamin e is to study the difference of the molecular geometry, which has different effect on the reaction activity of the molecule and produce different biological activity. semi - empirical ami and pm3 method and ab initio 3 - 21g methods are applied to optimize the four different geometries of tocopherol in the present work. using the two methods we have obtained some parameters about the biological activity
計算步驟是,先使用hyperchem6構造出各種化合物,用hyperchem自帶的分子力學mm +和polak - ribiere優化方法在目標分子的構象空間中尋找能量相對較低的構象,然後用am1半經驗方法進一步優化其構型,得到一系列能量值,然後利用hyperchem6 . 0其中集成的qsar模塊,計算化合物的qsar參數,其中包括:疏水性參數( logp ) 、分子表面積、總體積、折射率、極化率等參數。
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