例句與造句

1. The method of numeral simulating the coincidence neutron detection is proposed with combining the neutron transportation and probabilistic calculation . the method is introduced and used to simulate the nuclear warhead induced fission by source neutrons with energy below 1 mev
   推導(dǎo)并提出用中子輸運(yùn)計(jì)算與概率方法結(jié)合計(jì)算符合中子計(jì)數(shù)，對能量低于1mev的外源中子照射核彈頭誘發(fā)裂變的符合中子測量作了數(shù)值模擬。
2. In analyzing the neutron active detection , the neutron multiplication in the nuclear warheads induced by outer neutron source with different neutron energys is studied with numeral simulation , and the feasibility of through counting neutrons to determine the presence of high enrichment uranium ( heu ) in nuclear warhead has been proved . the method of detecting the warhead which contains heu pit by counting the released neut rons whose energy is higher than that of source neutron is studied . the feasibility of this method has been studied
   對幾種主動探測核彈頭方法進(jìn)行的研究中，首先對不同能量各向同性外源中子照射核彈頭的中子增殖行為進(jìn)行了數(shù)值模擬，檢驗(yàn)了用外源中子照射核彈頭后，通過測量瞬發(fā)中子在核彈頭中的增殖量，來證明核彈頭中高濃鈾存在的可行性；研究了用能量低于1mev的外中子源照射核彈頭，用測量核彈頭中裂變產(chǎn)生的高于源中子能量中子數(shù)的方法探測核彈頭，通過數(shù)值模擬分析了可行性。
3. The measurement data is scarce in 8 - 13 mev region due to the lack of mono - energetic neutron sources ( in this region , there are breakup neutrons besides the mono - energetic neutrons in the often used neutron sources such as t ( p , n ) 3 he and d ( d , n ) 3he sources . the secondary neutrons induced by breakup source neutrons will seriously contaminate the secondary neutron spectra induced by mono - energetic source neutrons ) . therefore , precise measurement for some key nuclides is necessary to check the evaluations in this region
   但在8 ? 13mev這一能區(qū)，由于沒有合適的單能中子源(因?yàn)樵谶@一能區(qū)，對于常規(guī)中子源如t ( p , n ) ~ 3he和d ( d , n ) ~ 3he中子源，除了單能中子以外，還有破裂中子成份，這部分源破裂中子在樣品上引起的次級中子，將嚴(yán)重影響測量結(jié)果) ，所以至今在8 ? 13mev能區(qū)這方面的測量數(shù)據(jù)極少。
4. It's difficult to find source neutron in a sentence. 用source neutron造句挺難的