品管圈（Quality Control Circle,QCC）是由相同、相近或互补工作场所的人们自动自发组成数人一圈的小圈团体（又称QC小组,一般6人左右）,其全体合作、集思广益,按照一定的活动程序解决工作现场、管理、文化等方面的问题及课题。它是一...品管圈（Quality Control Circle,QCC）是由相同、相近或互补工作场所的人们自动自发组成数人一圈的小圈团体（又称QC小组,一般6人左右）,其全体合作、集思广益,按照一定的活动程序解决工作现场、管理、文化等方面的问题及课题。它是一种比较活泼的品管形式。医院设备科开展第一期品管圈活动,取得了显著效果。展开更多
Hypothesis testing analysis and unknown parameter estimation of both the intermediate frequency(IF) and baseband GPS signal detection are given by using the generalized likelihood ratio test(GLRT) approach,applying th...Hypothesis testing analysis and unknown parameter estimation of both the intermediate frequency(IF) and baseband GPS signal detection are given by using the generalized likelihood ratio test(GLRT) approach,applying the model of GPS signal in white Gaussian noise,It is proved that the test statistic follows central or noncentral F distribution,It is also pointed out that the test statistic is nearly identical to central or noncentral chi-squared distribution because the processing samples are large enough to be considered as infinite in GPS acquisition problem.It is also proved that the probability of false alarm,the probability of detection and the threshold are affected largely when the hypothesis testing refers to the full pseudorandom noise(PRN) code phase and Doppler frequency search space cells instead of each individual cell.The performance of the test statistic is also given with combining the noncoherent integration.展开更多
文摘品管圈（Quality Control Circle,QCC）是由相同、相近或互补工作场所的人们自动自发组成数人一圈的小圈团体（又称QC小组,一般6人左右）,其全体合作、集思广益,按照一定的活动程序解决工作现场、管理、文化等方面的问题及课题。它是一种比较活泼的品管形式。医院设备科开展第一期品管圈活动,取得了显著效果。
文摘Hypothesis testing analysis and unknown parameter estimation of both the intermediate frequency(IF) and baseband GPS signal detection are given by using the generalized likelihood ratio test(GLRT) approach,applying the model of GPS signal in white Gaussian noise,It is proved that the test statistic follows central or noncentral F distribution,It is also pointed out that the test statistic is nearly identical to central or noncentral chi-squared distribution because the processing samples are large enough to be considered as infinite in GPS acquisition problem.It is also proved that the probability of false alarm,the probability of detection and the threshold are affected largely when the hypothesis testing refers to the full pseudorandom noise(PRN) code phase and Doppler frequency search space cells instead of each individual cell.The performance of the test statistic is also given with combining the noncoherent integration.
