Multivariate Capability Indices: Distributional and Inferential Properties

Process capability indices have been widely used in the manufacturing industry for measuring process reproduction capability according to manufacturing specifications. Properties of the univariate processes have been investigated extensively, but are comparatively neglected for multivariate processes where multiple dependent characteristics are involved in quality measurement. In this paper, we consider two commonly used multivariate capability indices MC_p and MC_pm, to evaluate multivariate process capability. We investigate the statistical properties of the estimated MC_p and obtain the lower confidence bound for MC_p. We also consider testing MC_p, and provide critical values for testing if a multivariate process meets the preset capability requirement. In addition, an approximate confidence interval for MC_pm is derived. A simulation study is conducted to ascertain the accuracy of the approximation. Three examples are presented to illustrate the applicability of the obtained results.     

浅析王维山水诗中的“无我”之意境

王维山水诗的最大特点在于把对禅和生命的理解化入对山水的观照之中。诗人抛弃了自我意识达到了一种“无我”的状态，真正地让山水有了自在的生命力，又不着痕迹地把禅的精神融入他的山水诗中，形成了极为优美深邃的意境。作者试图从王维山水诗所体现的“无我”意境，探索解读王维诗中生命与山水合而为一的“禅”的境界。     

The Timing of Divorce: Predicting When a Couple Will Divorce Over a 14‐Year Period

This paper investigates the predictability of divorce in a long‐term, prospective longitudinal study. Past research has indicated that 2 periods can be considered the most critical for the survival of marriages: (a) the first 7 years of marriage, during which half of all divorces are known to occur, and (b) the period during which the first child reaches 14 years of age, which has been suggested as a low point for marital satisfaction in the life course. In the present study, interaction variables at Time 1 (both during conflict and in an events‐of‐the‐day discussion following separation of the spouses for at least 8 hours) and noninteractive variables were used to predict divorcing both early and later in the marriage. A different set of variables predicted early divorcing than predicted later divorcing. Negative affect during conflict predicted early divorcing, but it did not predict later divorcing. By contrast, the lack of positive affect in events‐of‐the‐day and conflict discussions predicted later divorcing, but it did not predict early divorcing. Prediction was possible over the 14‐year period of the study with a model that included marital satisfaction, thoughts of marital dissolution, and affective interaction in both conversations. The model predicted divorce with 93% accuracy.     

论鲁迅和周作人“鬼民俗”的记忆与想象

由故乡鬼民俗的记忆而感发,鲁迅和周作人面对与鬼同行的现实,他们的文化态度和文学思考是有区别的:鲁迅在掏鬼心态的背后融入了深沉的文化思索,而周作人则在民俗——学术的立场,细细体味着人生的机微。二者表现出不同的民俗想象和价值取向。     

哲学研究中的前提性理论批判

当代哲学研究中,“出发点”迷恋、“批判性思维”的片面突出、“文本”情结的固守,这几种前提性的错误观念一直牵导着哲学家以及哲学整体走向迷途。对此进行清理批判,是使中国哲学研究走向合理方向的前提。     

马克思主义与批判实在论的辩证法

黑格尔的绝对理念、马克思的辩证唯物主义和批判实在论都属于辩证哲学的家族。马克思敲碎了黑格尔的坚果,拣起了一些碎片,他的伟大在于发现了结构矛盾与颠倒。巴斯卡与马克思分享了三种矛盾(结构矛盾、颠倒与科莱蒂矛盾),又增加了埃奇利矛盾。批判实在论指出,辩证法的本真面目是四重缺失:使对使缺失成为缺失的约束成为缺失。     

计算多转子系统临界转速的整体传递矩阵法

提出了整体传递矩阵法中耦合单元的概念，导出了各向同性和各向异性耦合单元的传递矩阵，并给出了几个算例。整体传递矩阵法是取各转子状态向量的集合作为系统的状态向量，各转子同时对系统状态向量进行传递，求得多转子轴系的整体传递矩阵方程，代入整体边界条件进行求即可得到多转子轴系的临界速。与子结构传递矩阵法相比，整体传递矩阵法不必将多转子系统在耦合单元处分割开来，示引入未知内力和位移，也不必建立分割处的平衡方程或变形协调条件。     

Simulating percentile points: stopping rules,precision, and scale

Two stopping rules are defined for the purpose of minimizing the number of iterations needed to provide simulated percentile points with a certain precision: one stopping rule is a result of defining precision relative to the scale of the random variable while the other is a result of defining precision relative to the tail area of the distribution. A simulation experiment is conducted to investigate the effects of the stopping rules as well as the effects of changes in scale. The effects of interest are the precision of the simulated percentile point and the number of iterations needed to achieve that precision. It is shown that the stopping rules are effective in reducing the number of iterations while providing an acceptable precision in the percentile points. Also, increases in scale produce increases in the number of iterations and/or decreases in certain measures of precision     

Deconstructing organizational communication for (productive) dissensus

Abstract

The metanarrative of ‘crisis’ is now often present in communication constructing an organization’s identity and culture. Processes by which certain interpretations of circumstances predominate over others have been theorized by Gramsci’s notion of hegemony, enriching communication research. Here, I develop an argument for an approach based not on normative and interpretive discourses, but instead on those that are critical and dialogic, an approach urgently necessary in researching the increasingly complex communicative situations of workplaces. I outline a methodology, an ethnography of a communication site (an Australian organization), which could be piloted to solicit a sample of employees to express their own views towards quotidian organizational communication.