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MOCVD系统生长过程的优化精确控制
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作者 王浩 范广涵 廖长俊 《华南师范大学学报(自然科学版)》 CAS 2004年第2期67-71,共5页
通过对TurboDiscMOCVD设备系统以及部件工作原理的研究,提出了多种对典型器件生产工艺的调整方案,如压力流量的调整,质量流量计(MFC)工作曲线的完善,主动进气补偿等等,实现了MOCVD生长系统生长过程的自动精确控制.并对设备提出了改进意见.
关键词 MOCVD 系统生长过程 精确控制 金属有机化合物气相淀积 生产工艺 质量流量计 半导体
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What Life Is and How It Originated
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作者 William Day 《Journal of Philosophy Study》 2013年第10期895-904,共10页
This paper refutes the mechanistic interpretation of cellular dynamics and contends that the life-giving principle is sustained growth a biological system and is uninterrupted growth balanced in a dynamic state by syn... This paper refutes the mechanistic interpretation of cellular dynamics and contends that the life-giving principle is sustained growth a biological system and is uninterrupted growth balanced in a dynamic state by synthesis and dissolution. The process began by an oxidation/reduction reaction on the surface of pyrite energized photovoltaically by sunlight. Hydrogen sulfide was oxidized, carbon dioxide was reduced, and phosphate on the surface of the pyrite was a reactant. The first organic compounds were sulfides and phosphoglycerates. These organophosphates were at the center of the energy cycle of all life where the dehydration of a relatively unreactive "low-energy" two-phosphoglycerate transforms it into the "high-energy" phosphoenolpyruvate. Life began as a growth process and continues to grow ceaselessly out of necessity. It cannot discontinue the life-giving energy flow without irreparable loss of the process. All forms of life past and present were and are stabilized systems in which the growth process is contained in metabolic turnover. 展开更多
关键词 origin of life life principle metabolic turnover
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