查询词典 fast neutrons

It consists of positively charged protons and neutral neutrons, known collectively as nucleons, held together by the strong force.

由带正电的质子和不带电的中子组成，这两者总称为核子，由强核力使其结合。

As a result of a However, as a result of nuclear reactions (which might be caused by the bombardment of atoms by protons, neutrons or other light particles), nuclei can be produced in an excited or unstable condition in which one or a number of nucleons are raised to an excited state.

运 行过程中，二氧化铀芯块需要承受结构变化，主要是由于高的运行温度和高温度梯度造成的，同时也是长期受到辐照的结果。

Positive protons, neutrons and negatrons strike a balance in forming a neutral atom.

在原子内部，带正电的质子、不带电的中子和带负电的电子，三者平衡形成一个不带电的平衡体——原子。

Since the atoms that make up normal,"solid" matter are mostly empty space, a star made almost entirely of tightly packed neutrons is extraordinarily dense: a fingernail's worth of a neutron star would have a mass of more than a trillion kilograms. A neutron star's density and gravity is second only to a black hole.

确切的说，是直径20km左右的一个超级中子，虽然不过只有一个大中型城市的体积，质量超过1.5倍太阳——译注）由原子组成的普通物质，其&实心&的物质内部其实绝大部分都是空的（大家完全可以用太阳系质量集中在太阳来想象原子内部，当然电子与行星有本质区别——译注），而一颗几乎全部由中子构成的恒星却密度极大：指甲大的一块中子星物质的质量达到万亿吨级，中子星的密度、引力仅次于黑洞。

When the metal rods of cadmium were pushed all the way in, and stray neutrons that entered the pile were absorbed, and could not enter uranium—235 nuclei, and so there was no reaction at all.

当镉金属棒全部推入，进入反应堆的流动中子就被吸收，不能进入铀－－235原子核，因而完全没有反应。

Deuterium, a natural isotope of heavy hydrogen, having one proton and on neutron, whereas normal hydrogen has one proton and zero neutrons, could be used routinely.

重水中的天然同位素氘具有一个质子一个中子，它不同于正常的氢只有一个质子没有中子，可以常规应用。

Charge comparison method used to discriminate photons and neutrons in liquid scintillators.

陈宇， 王子敬，毛泽普，等，电荷比较法测量液体闪烁体n，γ分辨性能。

Fraction of the total number of neutrons produced from fission, born from delayed neutron

C。 在由分产生之中子总中，自於迟延中子母核的分

Event, the delayed neutron is more likely to: Assume both neutrons remain in the core unless

比较同一分中生成的迟延中子和瞬发中子，迟延中子比较可能＿＿。

The terms for the effects of the neutrons reflected back from outside the reactor are added as extra delayed neutron terms to the reactor kinetics equation.

在反应堆动力学方程中，考虑了堆体外反照中子效应，将其作为模拟缓发中子处理。理论计算值与实验结果符合较好。

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。