MTDFREML software was used to estimate the genetic parameters of main economic traits of high quality merino sheep in the natural ecological conditions of Xinjiang.The estimated values of heritability were 0.56±0...MTDFREML software was used to estimate the genetic parameters of main economic traits of high quality merino sheep in the natural ecological conditions of Xinjiang.The estimated values of heritability were 0.56±0.07,0.16±0.06,0.33±0.08,0.20±0.08,and 0.31±0.08 for staple length,fineness,total fleece grade,greasy weight and live weight after shearing respectively.Large positive genetic correlation estimates were obtained between greasy weight and live weight after shearing(0.77±0.11),greasy weight and staple length(0.80±0.12);there was a negative genetic correlation(-0.45±0.15) between staple length and fineness.This suggests the attention should been paid to greasy weight and body weight when selection for fineness.展开更多
为了充分利用不同类型的时间传递链路,需要实现不同采样率下时间传递链路数据的融合应用,提出了一种基于多分辨率分析的数据融合方法.首先对原始数据进行小波分解,把数据分解到统一的分辨率,初步消除高频噪声;然后在不同分辨率下进行Kal...为了充分利用不同类型的时间传递链路,需要实现不同采样率下时间传递链路数据的融合应用,提出了一种基于多分辨率分析的数据融合方法.首先对原始数据进行小波分解,把数据分解到统一的分辨率,初步消除高频噪声;然后在不同分辨率下进行Kalman滤波;最后通过Mallat快速重构算法得到融合结果.使用该方法处理中国科学院国家授时中心(National Time Service Center,NTSC)和德国联邦物理技术研究所(PhysikalischTechnische Bundesanstalt,PTB)之间的时间传递数据,结果显示融合算法能够处理链路异常或中断造成的数据问题.由于GPS(Global Positioning System)PPP(Precise Point Positioning solutions)链路实测结果性能整体优于TWSTFT(Two-Way Satellite Time and Frequency Transfer)链路,因此用GPS PPP链路测量结果评估融合算法增益.以快速协调世界时(Rapid Realization of Coordinated Universal Time,UTCr)为参考,数据融合结果的准确性增益约1%,日频率稳定度增益优于20%.同时融合算法可以抑制TWSTFT链路的周期噪声,能够有效提高链路的稳定性和鲁棒性.展开更多
文摘MTDFREML software was used to estimate the genetic parameters of main economic traits of high quality merino sheep in the natural ecological conditions of Xinjiang.The estimated values of heritability were 0.56±0.07,0.16±0.06,0.33±0.08,0.20±0.08,and 0.31±0.08 for staple length,fineness,total fleece grade,greasy weight and live weight after shearing respectively.Large positive genetic correlation estimates were obtained between greasy weight and live weight after shearing(0.77±0.11),greasy weight and staple length(0.80±0.12);there was a negative genetic correlation(-0.45±0.15) between staple length and fineness.This suggests the attention should been paid to greasy weight and body weight when selection for fineness.
文摘为了充分利用不同类型的时间传递链路,需要实现不同采样率下时间传递链路数据的融合应用,提出了一种基于多分辨率分析的数据融合方法.首先对原始数据进行小波分解,把数据分解到统一的分辨率,初步消除高频噪声;然后在不同分辨率下进行Kalman滤波;最后通过Mallat快速重构算法得到融合结果.使用该方法处理中国科学院国家授时中心(National Time Service Center,NTSC)和德国联邦物理技术研究所(PhysikalischTechnische Bundesanstalt,PTB)之间的时间传递数据,结果显示融合算法能够处理链路异常或中断造成的数据问题.由于GPS(Global Positioning System)PPP(Precise Point Positioning solutions)链路实测结果性能整体优于TWSTFT(Two-Way Satellite Time and Frequency Transfer)链路,因此用GPS PPP链路测量结果评估融合算法增益.以快速协调世界时(Rapid Realization of Coordinated Universal Time,UTCr)为参考,数据融合结果的准确性增益约1%,日频率稳定度增益优于20%.同时融合算法可以抑制TWSTFT链路的周期噪声,能够有效提高链路的稳定性和鲁棒性.
