At some point , the density and temperature at the center of the cloud of gas will be high enough to ignite the nuclear fusion . the energy produced by the fusion will create two kinds of outward pressure to act against the gravitational attraction 随著恒星不断收缩，核心气体的温度及密度亦不断上升，直至燃点起热核反应，所产生的能量会造成两种向外的压力，对抗向内的万有引力。
It is not a great deal of energy ? equivalent to about 109 joules per kilogram of hydrogen , much less than the 1015 joules released by the nuclear fusion of the same amount of hydrogen 这能量其实没有多大游离每公斤的氢需要约109焦耳的能量，远低于等量的氢进行核融合所释放出的1015焦耳，所以就算宇宙中只有百万分之一的氢在恒星内进行核融合反应，也能产生足够的能量把剩下所有的氢给游离掉。
The large - scale superconducting magnets are presently widely used in modern high - energy particle accelerators and nuclear fusion experimental device , which generally operate at liquid helium temperature region . cryogenic technology is developing with the requirement of operation for superconducting magnets 而超导磁体大都运行在约4 . 5k ( - 269 )的液氦温区,这又促进了低温技术的发展。
Herein , the core of this paper is to improve the efficiency of syndication in venture capital investments . firstly , this paper introduces the definition of syndication and its ‘ nuclear fusion ’ effect , gives a new explanation by the analysis of experience curve and synergy 本文首先介绍了联合投资的定义以及联合投资会产生的“核聚变”效应,并利用经验曲线和协同性分析对联合投资做了进一步解释。
Recently the r - t and r - m instabilities have attracted the attention of many researchers all over the world for its important role in the controlled nuclear fusion with inertial confinement ( icf ) , electromagnetic implosion and the evolution of an astrophysical object such as the formation of a supernova 在惯性约束核聚变( icf )中，由于r - t和r - m不稳定性的作用，将影响到氘氚气体的内爆压缩、升温、点火和燃烧。
After the star enters the main sequence stage , energy comes from nuclear fusion , the combination of several small nuclei into a large nucleus . in contrast , the nuclear plants on earth generate energy by nuclear fission , the splitting of a large nucleus to several smaller ones 只要星体进入主序星阶段，能量转为来自核聚变相反地地球上的核电厂使用的是核裂变，即大原子核分裂为众多小原子核，过程中释放能量的机制。
The department ' s programs are at the forefront of nuclear science and technology leading to improved performance of fission - powered reactors , the technological applications of nuclear and radiation phenomena in biomedical , industrial , and environmental fields , and the development of nuclear fusion as an energy source 本系的课程走在核子科学和科技的最尖端，目的在提高核裂变反应炉的效能、核子和辐射在生物医学、工业和环境领域的应用，以及研发核融合成为稳定的能源。
The xecl excimer laser have broad applications in industry manufacture , scientific research , biomedical engineering , nuclear fusion , photoelectron , semiconductor etc . today , the excimer laser has been used in the serial of haloid excimer laser mainly , such as xecl , krf , xef , arf excimer laser 准分子激光在工业制造、科学研究、生物医学、核聚变、光电子、半导体等重要的课题研究领域上有广阔的发展远景。特别是准分子激光在光电材料、光电技术上有得天独厚的优良性能。
Based on the theory of hydrogen solution in palladium in hydrogen / palladium system and the theory of normal temperature nuclear fusion material and selective resonant tunneling model , some experiment for was carried out producing the " excess heat " and " heat after death " phenomena in ambient condition 基于对氢钯系统中氢溶于钯的理论分析，并结合“常温核聚变材料”理论和“选择性共振隧穿模型” ，通过实验探索产生“过热” ( excessheat )及“滞后发热” ( heatafterdeath )现象的客观条件。
Researches into the nuclear fusion reactions has created a need for handling the deuterium tritium fuel employed , and cryogenic fractional distillation was selected as one of the best process for making the required separations due to relatively large separation factors , low power consumption , high throughputs , relatively short start - up times , and flexibility of design 受控聚变的研究已给人类展示出取得更加安全、清洁，而且是无限丰富的能源的美好前景。在廉价制取聚变燃料氘以及提高核能原料利用率的方法中，低温精馏被认为是最经济可行的分离氢同位素的方法。
