The origins of natural neutron flux on the air-ground interface are described in this paper.
本文论述了地-空界面上天然宇宙中子流的来源；
Some (mathematic) -physical equations that describe the natural neutron radiation field are theoretically established.
从理论上建立了描述地-空界面上大气中子辐射场的数学-物理模型。
This article mainly deals with the resolution enhancement technique and its application in radioactive logs, such as natural gamma log, compensated neutron log and compensated density log.
着重探讨了放射性测井曲线中自然伽马测井曲线、补偿中子测井曲线和补偿密度测井曲线的高分辨率处理方法及其应用效果。
A high sensitive neutron monitor is described in this paper. It has an approximate counting rate of 20 CPM for natural background neutrons.
本文介绍了一种高灵敏度中子监测器，它对天然中子本底的计数率约每分钟20次计数。
The axial heat transfer performance of a natural circulation, which could be used in the cold neutron source (CNS), was experimentally investigated.
对一种用于冷中子源系统的自然循环进行了轴向传热特性研究，建立了以氟里昂为工质的同轴型热虹吸管传热实验系统。
An evaluation of a complete neutron nuclear data for natural niobium has been finished on the data measured by experiments up to 1989 and theoretical calculations with program MUP2 and AUJP.
对于天然铌的全套中子核数据评价是依据测量到1989年的实验数据。同时，理论计算采用了MUP2和AUJP程序。
Analysis of the activated background spectrum shows that natural copper is an ideal shielding material in fast neutron nuclear reactions.
通过分析天然铜的活化本底谱，可以看出它是快中子核反应中的最理想的屏蔽材料之一。
The neutron absorbed dose rate distributions for tumour and natural histiocyte are calculated respectively based on this software and the results are analyzed.
在软件模型的基础上分别计算了不同能量的中子进行治疗时的肿瘤及正常组织剂量分布，并对计算结果进行了分析。
The neutron absorbed dose rate distributions for tumour and natural histiocyte are calculated respectively based on this software and the results are analyzed.
在软件模型的基础上分别计算了不同能量的中子进行治疗时的肿瘤及正常组织剂量分布，并对计算结果进行了分析。
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