barrier n. 1.柵,柵欄,隔欄,障壁,隔板,擋板;賽馬的出發(fā)柵。 2.關(guān)口,(海關(guān))關(guān)卡。 3.障礙;壁壘;界線。 4.(擴(kuò)伸到海洋中的)南極洲冰層。 a moisture barrier 防濕層。 a potential barrier 【物理學(xué)】勢壘,位壘。 a barrier to progress 進(jìn)步的障礙。 set up a barrier between 在…中間設(shè)置障礙。 the barriers of class 階級的壁壘。 the barrier physics 邊緣物理學(xué)。 the language barrier 語言的隔閡。 vt. 用柵圍住。
linear adj. 1.線的,直線的。 2.長度的。 3.【數(shù)學(xué)】一次的,線性的。 4.【動、植】線狀的;細(xì)長的。 5.由線條組成的,以線條為主的,強(qiáng)調(diào)線條的。 linear amplification 直線放大。 a linear equation 一次方程式。 a linear leaf 線形葉。 linear arts 線條藝術(shù)。
The complex nonlinear pursuit - evasion model of two spacecraft in near - earth coplanar orbit is simplified to linear model , the circular region the radius of which is equal to capture radius is defined as target set , capture is achieved when the evader come into the target set and the game is over ; the boundary of useable part ( bup ) is determined , and the analytical form solution of the linear equations is obtained by backward integration of the state variables from the bup , the linear barrier of the pursuit - evasion model and the optimum thrust of the both sides are thus obtained 本文將近地共面軌道內(nèi)運(yùn)動的兩飛行器非線性追逃模型簡化為線性模型,以捕獲半徑的圓域定為目標(biāo)集,確定目標(biāo)集邊界上的可用部分,并以此為各狀態(tài)變量的起點(diǎn),對時間進(jìn)行倒向積分,求得線性方程組的解析解,從而確定了該追逃模型的線性界柵,以及界柵上對策雙方的最優(yōu)推力,即求得了滿足最優(yōu)策略時相對運(yùn)動的軌跡和推力。