volume variance

基本解釋

We mainly discuss three aspects: (1)to describe the mean and variance calendar effects of return and volume;
主要從以下三個(gè)方面加以討論：收益率和交易量的均值及方差的日歷特征；
In this paper, we apply multiassets variance to analyze the informational efficiency of 50ETF, and test the price discovery efficiency of 50ETF by trading price and trading volume.
本文采用多資產(chǎn)方差分解法分析50ETF交易的信息含量，從交易價(jià)格和交易量對50ETF的價(jià)格發(fā)現(xiàn)功能進(jìn)行檢驗(yàn)。實(shí)證結(jié)果顯示，我國ETF具有一定的價(jià)格發(fā)現(xiàn)功能，但與西方成熟資本市場相比仍存在一定差距。
A standard control chart based on probability integral transform theory is given, which can be used to control process mean and variance efficiently in the low volume manufacturing.
用概率積分變換理論，給出了控制過程均值、過程方差的標(biāo)準(zhǔn)化控制圖，適用于小批量生產(chǎn)環(huán)境下對過程均值、過程方差的有效控制。