查询词典 fast neutrons

When the hydrogen bomb, the fusion reaction caused by a large number of high-energy neutron fission of uranium in the shell, release of energy and fission neutrons, fission and fusion neutron part of charging the lithium--6 nuclear event of a nuclear reaction Tritium, tritium and deuterium occurs again further fusion reactions.

当氢弹爆炸时，聚变反应产生的大量高能中子引起壳体中铀核裂变，放出能量和裂变中子，裂变中子有一部分与聚变装料中的锂－6核发生核反应产生氚，氚又与氘发生进一步的聚变反应。

The energy distribution of gamma photons and neutrons reveals the elemental composition of the soil to a depth of several meters.

光子和中子的能量分布，可显示土壤内部数公尺深处的元素组成。

Essentially, all the neutrons and part of the gamma rays are emitted in the actual fission process.

从根本上说，所有的中子和一部分γ射线都是在裂变实际的过程中放射出来的。

For reactor, the point reactor kinetics equation with six-group delayed neutrons is used and influence of coolant's and fuel's temperature is considered, conduction model of one dimension and single-channel model is used in thermal and hydraulic calculation, third-order Hermite polynomial is used to solve the point reactor kinetics equation.

对于反应堆，在物理计算中采用了带有六组缓发中子的点堆方程，同时考虑了多普勒效应及冷却剂温度效应对反应性的影响；在热工水力计算中采用了一维的热传导模型与单通道模型；在求解点堆方程中采用了Hermite插值的方法，克服了点堆方程的刚性问题。

Therefore, if we focus mainly on the positive, analytical left-brain pedagogical style, the right-brain-controlled neutrons which take charge in our intuition, creativity and balance will be trimmed ruthlessly.

如果只重视实证、分析式的左脑取向教育，会使右脑掌管的直觉、创造、平衡等神经元遭到无情修剪。

With neutrons, the light element is not usually at any marked disadvantage.

对于中子，轻元素通常不是一个突出的问题。

In this paper, the simulation of interaction between scintillation fibers and 14 MeV neutrons after penetrating through objects is presented.

模拟了14 MeV中子在穿透样品后与闪烁体光纤的作用。

For 14 MeV neutrons, the detection efficiency is as high as 21.4%.

阵列对14 MeV中子探测效率经估算可达21.4%。

At the same time, the neutrons and protons are excited to be emitted with the same probability for Pauli potential, momentum dependence interaction and impact parameter, even though their effects on preequilibrium neutron number and proton number are obvious.

故从低能量到较高能量的较大能区内，前平衡发射的中子-质子比的理论值与实验值的比较是提取对称势形式和强度的灵敏探针。

Cadmium has the ability to absorb neutrons, so it is used as a barrier to control nuclear fission.

镉有吸收中子的能力，所以它被用作防止核裂变的屏障。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。