查询词典 fast neutrons

All particles which are together with the neutrons and protons are called baryons.

所有与中子、质子放在一起的粒子统称为重子。

Only about 5% of our universe is made of normal matter as we know it, consisting of protons and neutrons, or baryons, which along with electrons, form the building blocks of ordinary matter.

我们知道我们的宇宙只有约5%是由质子和中子以及电子这些普通物质构成，剩下的由难以捉摸的暗物质（23%）和暗能量（72%）组成。

Investigations are carried on the microstructure, mechanical properties and shielding effectiveness against thermal neutrons, 60Co and 137Cs rays of Fe78Si9B13 amorphous thin ribbons. Significant differences of micro- structure exist between the free face and wheel face.

对Fe78Si19B13非晶薄带的微观结构、力学性能进行了初步研究，并测试了非晶薄带叠层板材对高能射线（热中子及60Co、173Cs 2种γ源射线）的屏蔽效果。

The free neutrons can bombard other nuclei, leading to a series of fissions called a chain reaction.

自由中子可以轰击其它的核，导致一系列的裂变，称为链锁反应。

A self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others.

一种自我维持的核反应；一个原子分裂后释放的中子引起其他原子分裂的一系列核裂变过程。

The reactor core consisted of pellets ofuranium fuel inside bricks made of graphite, which served as a "moderator",reducing the speed of the neutrons in order to maximise their ability to causefurther fissions.

反应堆的核心包括：含有球状铀燃料的石墨砖，起到&调节器&的作用，可以减少中子的速度以最大化它们引发进一步裂变的能力。

Physics the interaction that binds protons and neutrons together in the nuclei of atoms; mediated by gluons.

使质子和中子在原子核中结合的基本粒子间的相互作用；以胶子作为媒介。

Science attempts to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons

科学试图描述和说明分子和原子的特性，以及它们的成分：电子，质子，中子和其它更鲜为人知的粒子如夸克和胶子等。

The Standard Model lets us calculate that nearly all the mass of protons and neutrons is from the kinetic energy of their constituent quarks and gluons (the remainder is from the quarks' rest mass).

从标准模型可以得知，质子与中子的质量几乎皆来自夸克与胶子的动能（其馀的质量则来自夸克的静止质量）。

There are fields for quarks of various types, some of which are bound together in the protons and neutrons that make up the nuclei of ordinary atoms.

也有一些相对于各种夸克的场，其中的一些结合成质子和中子（就是组成原子核的那些东西）。

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。