primary aging 中文意思是什麼
primary aging
解釋
主因老化-
In the third chapter, the influence of current density, solution concentration, erosion time and aging in ambient air on the pl spectra of ps suggests that peak would blue shift with current density increasing, and with erosion time and aging time prolonging ; with the increasing of solution concentration, peaks would red shift when solution concentration less than 1 : 1 but blue shift when solution concentration greater than 1 : 1. above phenomena can be explained by quantum confinement and light center model, but do not deny the action of si - h bonding and defect on the surface in the process of photoluminescence. at present, radiation mechanism is still one of the primary problems in the study of ps
在第z三章中；通過對比，分析了電流密度、陽極化時間、溶液濃度以及自i然氧化時間對多孔硅光致發光光譜的影響，認為在一定的范圍內，多i孔硅的發光峰位會隨電流密度的增大而藍移，要獲得較強的發光，需z要選擇合適的電流密度；隨著腐蝕時間的延長，多孔硅的發光峰位會i發生藍移；當f酸的濃度較小q ： 1 ）時，峰位隨濃度的增大表現為向i低能移動；而當f酸的濃度較大河山時，峰位隨濃度的增大則表現z為移向高能；多孔硅在空氣中自然氧化；其發光峰位發生藍移，而強i度隨放置時間的延長而降低。 -
The primary contents include three titles : the aged and the population aging ; the status and trend of the aging population in the world ; the status and trend of the aging population in china. in this part, the concepts of the aged and the population aging are explained distinctly, the development traits and trend of population aging in world and china are stated reasonedly. in a word, this part establishes theory and practice basis for the later analysis
目前國際上通用界定為65歲及以上的人口為老年人口，也有些國家採用60歲及以上的人口為老年人口；介紹了人口老齡化的概念及內涵，指出人口老齡化是人口年齡結構老化的過程，是人口年齡結構中老年人口比重不斷提高的過程，是人類社會發展的一個必然過程，是一個轉變性的概念，是一個具有高生育率和高死亡率的人口向著低生育率和低死亡率人口轉變的概念。 -
The effects of mediators on the aging of primary mental abilities
基本心理能力老化的中介變量
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