排序方式: 共有29条查询结果,搜索用时 15 毫秒
1.
当产品质量指标服从二元正态分时,可用T2控制图与Λ控制图联合判断产品生产的过程是否处于受控状态。本文利用T2统计量与F统计量、Λ统计量与F统计量之间的关系,得到了两指标情形下两类基于F分布统计量的统计过程控制图,简称双F统计过程控制图,并给出了控制图应用实例。 相似文献
2.
We study limit distribution of partial sums SN,k(t) =
s = 1
[N t]
Ak(Xs) of Appell polynomials of the long-range dependent moving average process Xt> = i t bt - i i, where {i} is a strictly stationary and weakly dependent martingale difference sequence, and bi id - 1 (0 < d < 1/2). We show that if k(1-2 d)<1, then suitably normalized partial sums SN,k(t) converge in distribution to the kth order Hermite process. This result generalizes the corresponding results of Surgailis, and Avram and Taqqu obtained in the case of the i.i.d. sequence { i}. 相似文献
3.
Spectral Efficiency Evaluation for MRC Diversity Schemes Over Generalized Rician Fading Channels 总被引:1,自引:0,他引:1
Vidhyacharan Bhaskar 《International Journal of Wireless Information Networks》2007,14(3):209-223
In this paper, closed-form expressions for the capacities per unit bandwidth for generalized Rician fading channels are derived
for power and rate adaptation, constant transmit power, channel inversion with fixed rate, and truncated channel inversion
adaptation policies. The closed-form solutions are derived for the single antenna reception (without diversity combining)
and maximal-ratio combining (MRC) diversity cases. Truncated channel inversion adaptation policy is the best policy for the
single antenna reception case, while the channel inversion with fixed rate policy is the best policy for the MRC diversity
case. Constant transmit power policy provides the lowest spectral efficiency as compared to the other policies with and without
diversity. 相似文献
4.
在多元重复测量试验模型下,当受试对象观测矩阵的协方差矩阵∑为等方差等协方差结构时,给出了参数的似然比检验统计量.给出该检验在原假设下的渐近零分布和在备择假设下的渐近非零分布,并就检验的功效进行了分析. 相似文献
5.
For the multivariate ℓ1-norm symmetric distributions, which are generalizations of the n-dimensional exponential distribution with independent marginals, a geometric representation formula is given, together with some of its basic properties. This formula can especially be applied to a new developed and statistically well motivated system of sets. From that the distribution of a t-statistic adapted for the two-parameter exponential distribution and its generalizations is determined. Asymptotic normality of this adapted t-statistic is shown under certain conditions. 相似文献
6.
Run-Ze Li Kai-Tai Fang Li-Xing Zhu 《Journal of computational and graphical statistics》2013,22(4):435-450
Abstract This article proposes some probability plots are proposed to test spherical and elliptical symmetry in terms of some invariant statistics under orthogonal transformations. Some correlation coefficients as numerical measures of detecting deviation from spherical or elliptical symmetry are recommended, and the empirical percentiles of these correlation coefficients are calculated by simulation. The simulation results for data sets from 12 different populations show that the new plots are useful for testing spherical and elliptical symmetry. Some discussion is given also. 相似文献
7.
Let X1,...,Xn be independent and identically distributed random variables and Wn = Wn(X1,...,Xn) be an estimator of parameter θ.Denote Tn =(Wn - θ0)/sn,where sn2 is a variance estimator of Wn.In this paper a general result on the limiting distributions of the non-central studen-tized statistic Tn is given.Especially,when s2n is the jacknife estimate of variance,it is shown that the limit could be normal,a weighted χ2 distribution,a stable distribution,or a mixture of normal and stable distribution.Applicati... 相似文献
8.
煤矿井下防爆型无主机语音通信系统设计 总被引:1,自引:0,他引:1
针对煤矿井下语音通信速率低,带宽小,音质差,噪声大等缺点,设计了一种煤矿井下防爆型低功耗无主机语音通信系统。该系统的语音编解码采用高压缩率算法RALCWI的CMX618,系统控制采用低功耗STM32F103RE控制器,语音的远距离通信采用CAN总线方式。试验结果表明,语音的压缩速率模式2 400 b/s时,音质较好,通信稳定可靠,满足煤矿井下语音通信带宽要求,语音质量,系统稳定与可靠性高的要求,易于在煤矿系统中推广。 相似文献
9.
10.
XULIZHI YUHONGQUAN 《高校应用数学学报(英文版)》1997,12(2):225-232
Here presented is a unified approach to a wide class of symmetric Sfirling number pairs,which is determined by four complex parameters and includes as particular cases various previousextensions of Stirling numbers due to Carlicz, Howard, Koutras, Gould-Hopper, respectively.Certain Schlomilch-type formulas and congruence properties will be also exhibited. 相似文献