variance reduction 中文意思是什麼
variance reduction
解釋
方差低減-
Tricepstrum equalization algorithm ( btea ) and super - exponential ( se ) algorithm based on block data estimation is studied, and these algorithms use hos explicitly. their performance, such as estimation variance and bias, is analyzed. a kind of sparse cross cumulant and sparse equalizer is proposed to simplify the se algorithm, and the simulating results show efficient reduction in complication
?研究了幾種直接使用高階統計量的演算法，包括基於數據段估計的倒三譜演算法和超指數演算法，分析了演算法的估計方差和偏差等性能；由於超指數演算法計算量較大，不利於實時均衡，利用水聲通道的稀疏性，提出了一種基於稀疏互四階累積量和稀疏權的演算法，有效降低了超指數演算法的計算量。 -
Firstly, we find that both the quoted bid - ask spreads and depths decline dramatically in all twenty - five closed - end funds following the reduction in minimum tick size. we also find trade frequency increase. secondly, our analysis shows the reduction in minimum tick size cause an decrease in the variance of rice. finaly, we find that the minimum tick size influence the market efficency and the reduction in minimum tick size increase the market information efficency
研究結果表明：一，最小報價單位「分改厘」使上海證券交易所交易的25支封閉基金的買賣價差和報價深度明顯減小，而交易頻數增加：二，最小報價單位的減小降低了封閉式基金的價格波動性；三，最小報價單位的大小會影響市場效率， 「分改厘」提高了封閉式基金市場的信息效率。 -
This paper mainly research how to take full advantage of various quality tools, including work - site management 5s, traditional seven quality tools, process capacity analysis, poor quality cost analysis and more complicated statistics factorial experiment and variance analysis, to lower products cost and improve revenue through process deviation reduction, process cycle time reduction or process output improvement
該論文主要研究如何運用各種質量持續改進工具：現場管理5s法、傳統的七種質量工具、過程工序能力分析、質量成本分析法以及較復雜的統計學知識因素試驗和方差分析持續降低過程偏差，減少過程周期時間或增加過程產出，從而降低產品成本，增加收入。 -
High variance reduction and processing time saving due to systematic descriptive sampling could be expected
用系統描述性抽樣代替蒙特卡羅的隨即抽樣過程，從而使得計算效率與降低方差都得到了明顯地改善。
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