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- double ratio estimate 复比估计值
- double ratio estimator 复比估计量,复比估计
- Nonreponse is a common seen problem in sample surveys. This paper deal with a ratio estimator by use of double sampling when there exsits nonresponse. 无回答是在抽样调查中常遇到的问题,本文给出了如何用双重抽样来处理存在无回答时的比率估计量。
- approximate variance of the ratio estimate 比率估计的近似方差
- Ratio Estimate in Two-Stage Sampling 二阶比估计
- Limiting distribution of ratio estimate 比率估计值的极限分布
- In this paper, the bias of the ratio estimator and the estimateof mean square errors of this estimator with known numerator have been compared and discussed. 给出了分子已知情况下比率估计量的偏差和均方误差以及均方误差的估计，并对两类比率估计量进行了比较.
- My simple excel file can already manipulate the existing data to do HSF/HHF arbitrage, golden ratio estimation and much much more ‘functions’ if I want to. 幸而通道底部支持亦在上移中，限制了指数的再跌空间，令大市有机会于未来一、两个月内呈现反覆上升的走势。
- Secondly, this thesis compares the hedging effectiveness of two hedge ratio estimating methods, the Ordinary Least Square (OLS) and Error Correction Model (ECM). 第二，论文在理论上比较了最小二乘法（OLS）与误差修正模型（ECM）两种套期保值率估计方法下的套期保值效果。
- The Ratio Estimate of Two Ratios 两个比率的比率估计量
- He is working double tides to finish his essay. 他日夜苦干，赶写他的文章。
- I do not realize it is a double feature. 我原先不知道这是双片连映。
- Double agents live in a perpetual state of fear. 两面派永远过着提心吊胆的生活。
- I want a double room with a view. 我要一间能看到风景的双人房间。
- He was so fat that he had a double chin. 他胖得有双下巴了。
- The carpet is too thick to double up. 这地毯太厚没法折叠。
- This paper discusses three methods for the signal-to-noise ratio estimation of seismic records,and they are SVD method,statistical averaging method and frequency-domain estimation method,respectively. 估算地震记录信噪比的三种方法有SVD法、统计平均分析法和频率域估算法。
- Is the material single width or double width? 这幅料子是单幅的还是双幅的？
- Implementation of the scheme has resolved the problems on difficult hydrogen nitrogen ratio estimation and difficult control, it has apparent economic and social benefit and worth extend. 该方案实施后,解决了操作人员在实际操作过程中对氢氮比判断难、控制难的问题,具有明显的经济、社会效益及推广价值。
- Reserve double room June fourth to tenth inclusive. 预订双人房间，六月四日至十日，共六晚，望订妥复电。
