selectivity factor 中文意思是什麼
selectivity factor
解釋
選擇系數- selectivity : n. 1. 選擇；精選。2. 【無線電】選擇性；選擇度；【物理學】選擇能力；選擇率。
- factor : n 1 〈英國〉經銷人；（代客買賣收取傭金的）經紀人；代理商；代辦人；〈蘇格蘭語〉 土地經管人。2 要素...
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Using nano lih and nano nah as reducers, in refluxing thf and under normal pressure, cinnamaldehyde were selectively reduced to cinnamyl alcohol with selectivities of 99 % at higher conversions. changing reaction temperature or the molar ratio between reactants and cinnamaldehyde can improve the selectivities and conversions. in addition, the sequence of the reactants is another factor to affect the selectivity and conversion in this reaction
實驗還同時考察了溫度、 mh的比例、加樣順序等因素對選擇還原反應的影響：其中，溫度的升高能加快反應的速度並提高反應的轉化率和選擇性； mh比例的增大也能加快反應速度並提高反應的選擇性和轉化率；另一方面，改變加樣的先後順序會明顯改變反應的選擇性和轉化率。 -
The basic framework of performance evaluation includes two parts : the evaluation of risk - adjusted returns and factor analysis. we find no apparent evidence to show funds both in china and in usa have stock selectivity ability or market timing ability
業績評估基本的分析框架包括兩部分：一部分是對（風險調整后的）基金投資收益率的研究；一部分是對基金業績的歸因研究。
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