The high energy neutrons released by fission travel at very high speeds fast neutrons and must be slowed down to increase its probability of hitting more uranium atoms and in turn induce more fission in the reactor 核裂變所釋放的高能量中子移動(dòng)速度極高快中子,因此必須透過減速,以增加其撞擊鈾原子的機(jī)會(huì),同時(shí)引發(fā)更多核裂變。
The high energy neutrons released by fission travel at very high speeds ( fast neutrons ) and must be slowed down to increase its probability of hitting more uranium atoms and in turn induce more fission in the reactor 核裂變所釋放的高能量中子移動(dòng)速度極高(快中子) ,因此必須透過減速,以增加其撞擊鈾原子的機(jī)會(huì),同時(shí)引發(fā)更多核裂變。
A focal plane imaging is limited in catching object when spot - focusing horn lens antenna is applied in ballistic wake microwave interferometer . so we consider to designing multiple beam focusing horn lens antenna in order to augment the range of catching and enhance the probability of hitting the target 本文的主要工作是針對(duì)彈道靶尾跡微波干涉儀里的點(diǎn)聚焦單波束捕捉目標(biāo)的有效性能不足,而考慮設(shè)計(jì)一個(gè)具有點(diǎn)聚焦特點(diǎn)的多波束聚焦透鏡天線,以增大捕捉范圍和提高中靶率。
The main research work and achievements in the dissertation are given as follows : 1 using dynamic programming techniques and two different criterions ( maximum probability of hit criterion and maximum expected no . of penetrators criterion ) , the author investigates optimal allocation of tactical missiles between a primary target and a secondary target under the condition that the primary target is defended by the secondary target ( only " normal " defensive mode can be used by the defender ) , presents the optimal policy of tactical missiles attacking the primary target 本文所進(jìn)行的研究工作和取得的創(chuàng)新性成果主要為: 1利用動(dòng)態(tài)規(guī)劃理論和兩個(gè)不同的準(zhǔn)則(最大命中概率準(zhǔn)則和最大期望突防數(shù)量準(zhǔn)則) ,研究了一個(gè)主要目標(biāo)在一個(gè)次要目標(biāo)防衛(wèi)下(次要目標(biāo)采用“常規(guī)”防守模式) ,戰(zhàn)術(shù)導(dǎo)彈對(duì)這兩個(gè)目標(biāo)打擊的優(yōu)化分配問題,給出了導(dǎo)彈對(duì)目標(biāo)打擊的最優(yōu)分配策略。
2 based on dynamic programming techniques , using three different criterions ( maximum probability of hit criterion , maximum expected no . of penetrators criterion , and minimum expected cost criterion ) , the author investigates optimal allocation of tactical missiles between a ( several ) primary target ( s ) and several secondary targets under the condition that the primary target ( s ) is defended by the secondary targets ( only " normal " defensive mode can be used by the defender ) . the optimal allocation policies of tactical missiles between the primary target ( s ) and the secondary targets are given 2基于動(dòng)態(tài)規(guī)劃理論,采用三個(gè)不同的準(zhǔn)則(最大命中概率準(zhǔn)則、最大期望突防數(shù)量準(zhǔn)則以及最小期望費(fèi)用準(zhǔn)則) ,研究了一個(gè)和多個(gè)主要目標(biāo)在多個(gè)次要目標(biāo)防衛(wèi)下(次要目標(biāo)采用“常規(guī)”防守模式) ,戰(zhàn)術(shù)導(dǎo)彈對(duì)這兩類目標(biāo)打擊的優(yōu)化分配問題,給出了導(dǎo)彈對(duì)目標(biāo)打擊的最優(yōu)分配策略。