A note on the operating characteristic curve of the known sigma single sampling variables plan

The operating characteristic curves of certain known sigma variables sampling plans may not be satisfactory in that they have a tendency to reject even lots of acceptable quality. This note presents the theory and a method to identify such known sigma variables plans possessing unsatisfactory operating characteristic curves.     

由电脑PH计确定酸碱滴定终点PH值

本文论述了利用电脑PH酸度计测定酸碱滴定中的终点PH值,并应用于一些酸碱滴定中,收到了好的效果,结果满意。     

Recurrence relations for moments of progressively censored order statistics from logistic distribution with applications to inference

In this paper, we establish several recurrence relations for the single and product moments of progressively Type-II right censored order statistics from a logistic distribution. The use of these relations in a systematic manner allows us to compute all the means, variances and covariances of progressively Type-II right censored order statistics from the logistic distribution for all sample sizes n, effective sample sizes m, and all progressive censoring schemes (R₁,…,R_m). The results established here generalize the corresponding results for the usual order statistics due to [Shah, 1966] and [Shah, 1970]. These moments are then utilized to derive best linear unbiased estimators of the location and scale parameters of the logistic distribution. A comparison of these estimators with the maximum likelihood estimations is then made. The best linear unbiased predictors of censored failure times are briefly discussed. Finally, an illustrative example is presented.     

高职《汽车单片机与局域网技术》课程教学改革与实践

分析当前高职《汽车单片机与局域网技术》课程教学存在的问题,提出改革汽车单片机与局域网技术课程教学的策略,探讨了课程教学模式改革的一些经验。     

Moments of Order Statistics from Weibull Distribution in the Presence of Multiple Outliers

In this article, we derive exact expressions for the single and product moments of order statistics from Weibull distribution under the contamination model. We assume that X₁, X₂, …, X_{n ? p} are independent with density function f(x) while the remaining, p observations (outliers) X_{n ? p + 1}, …, X_n are independent with density function arises from some modified version of f(x), which is called g(x), in which the location and/or scale parameters have been shifted in value. Next, we investigate the effect of the outliers on the BLUE of the scale parameter. Finally, we deduce some special cases.     

社会工作视野下单亲母亲家庭子女教育探究

20世纪80年代以来,伴随着改革开放和市场经济大潮的冲击,人们的家庭与婚姻观念发生了深刻的转变,我国离婚人数和离婚率持续上升,近五年来增速明显,单亲家庭逐渐增多。单亲母亲家庭作为一种特殊的家庭组织形式,已经是一个不容忽视的社会问题。对家庭成员的成长忽视,对于我国人口素质的提高带来极为不利的影响,也会给社会带来不稳定的因素。     

An optimal selection of two-level regular single arrays for robust parameter experiments

Efforts have been made in the literature to find optimal single arrays which work best for the robust parameter experiments. However, examples show that in many cases the optimal designs obtained by the existing criteria cloud not attain the maximum number of clear interested effects for robust parameter experiments. In this paper, through a similar way of Zhang et al. (2008) (ZLZA, in short), an aliasing pattern to measure the confounding between the interested effects and other effects for the case of robust parameter designs is introduced. A new criterion for selecting optimal two-level regular single arrays is proposed. In the consideration of the criterion, two rank-orders of effects are suggested: one is based on the interest of experimenters and the other is under the usual effect hierarchy principle. The optimal designs are tabulated in the appendix.     

A Single Man and a Tragic Woman

Depicting the fraught relationship between a gay man and his straight female best friend, Tom Ford's A Single Man (2009) offers a complex, and often contradictory, depiction of its leading female character, Charley. At once glamorous and troubled, stunning and damaged, Charley reproduces a number of problematic stereotypes regarding women, in general, and fag hags, in particular. At the center of these problems is the film's insinuation that Charley has a melancholic attachment to George, her gay male companion. At first glance, A Single Man reproduces Freudian constructs of melancholy as a pathological response to traumatic loss; this essay argues, however, that the film's many ambivalences also offer opportunities for critical consideration of melancholy as a tactical response to heteronormativity.     

Group Work as a Protective Factor for Immigrant Youth

While constructing a cultural understanding of the adaptation process of Hispanic immigrant youth, this article illustrates how social group process acts as a "protective factor" which promotes a capacity for competence and mastery over their new environment.