知识创造的SIO-IE模型——对野中郁次郎SECI模型的修正与改进

知识按照其可言说/表达程度的不同构成内隐性-外显性谱,所有的知识都可以在谱图上找到自己适当的位置,通常所说的隐性知识和显性知识分处于谱图的两端。知识创造过程可归结为共同化、融合化和操作化三个阶段的螺旋上升过程,三个阶段都存在知识的内化和外显化。外显化与内化相互依赖、相互促进,从而促使知识不断地增长,最终创造出操作知识和创新知识。     

《普度明太祖长卷图》及其第十三段回鹘蒙古文考释

《普度明太祖长卷图》（又称《噶玛巴为明太祖荐福图》）现收藏于西藏博物馆。明朝永乐五年（1407年）,西藏噶举派宗教领袖第五世活佛噶玛巴一行应明成祖朱棣的邀请抵达南京,为已故明太祖朱元璋及其皇后荐福。长卷图共49幅,22幅画的右侧有汉、波斯、傣、藏、回鹘蒙古文等五种文字的说明。该图中的回鹘蒙古文说明共22段76行,约1500个词。长卷图第十三段回鹘蒙古文考释及汉文和转写的研究有它的独特意义。     

A new double sampling control chart for monitoring process mean using auxiliary information

Statistical quality control charts have been widely accepted as a potentially powerful process monitoring tool because of their excellent speed in tracking shifts in the underlying process parameter(s). In recent studies, auxiliary-information-based (AIB) control charts have shown superior run length performances than those constructed without using it. In this paper, a new double sampling (DS) control chart is constructed whose plotting-statistics requires information on the study variable and on any correlated auxiliary variable for efficiently monitoring the process mean, namely AIB DS chart. The AIB DS chart also encompasses the classical DS chart. We discuss in detail the construction, optimal design, run length profiles, and the performance evaluations of the proposed chart. It turns out that the AIB DS chart performs uniformly better than the DS chart when detecting different kinds of shifts in the process mean. It is also more sensitive than the classical synthetic and AIB synthetic charts when detecting a particular shift in the process mean. Moreover, with some realistic beliefs, the proposed chart outperforms the exponentially weighted moving average chart. An illustrative example is also presented to explain the working and implementation of the proposed chart.     

A bivariate distribution with Lomax and geometric margins

We develop a stochastic model describing the joint distribution of $(X,N)$, where $N$ has a geometric distribution while $X$ is the sum of $N$ dependent, heavy-tail Pareto components. Models of this form arise in many applications, ranging from hydro-climatology to finance and insurance. We present fundamental properties of this vector, including marginal and conditional distributions, moments, representations, and parameter estimation. We also include an example from finance, illustrating modeling potential of this new bivariate distribution.     

基于协方差阵特征结构的新型控制图研究

本文在深入分析现行广义方差类的统计控制图存在的统计监控缺陷的基础上,提出了对多变量过程的协方差阵的特征向量张成的坐标系的一致性进行统计监控的C控制图,以及对特征值构成的椭球体的相似性进行监控的S控制图,有效地提高了对多变量过程的协方差阵的异常变动的统计监控能力。仿真表明,联合使用C控制图、S控制图及常规均值T²控制图,能够实现对多变量过程的协方差阵与均值的系统监控,显著改善监控效率。     

Determining the optimal double-component assignment for a stochastic computer network

This study determines the optimal double-component assignment based on the system reliability criterion for a computer system, in which the computer system is represented as a network with a set of links and a set of vertices. The double-component assignment is to assign a set of transmission lines (resp. facilities) to the links (resp. vertices) of the network, in which each transmission line (resp. facility) has multiple states due to maintenance or failure. Thus, the computer system according to any double-component assignment is called a stochastic computer network. The system reliability is the probability that the specific units of data are successfully transmitted through the stochastic computer network. An optimization algorithm which integrates the genetic algorithm, minimal paths, and Recursive Sum of Disjoint Products is utilized to find the optimal double-component assignment with maximal system reliability. Several computer networks are utilized to demonstrate the efficiency of the proposed algorithm compared with other algorithms. By solving this problem, data can be more reliably transmitted and thus the organization operation is executed more smoothly.     

Nonparametric confidence intervals for Tmax in sequence-stratified crossover studies

Tmax is the time associated with the maximum serum or plasma drug concentration achieved following a dose. While Tmax is continuous in theory, it is usually discrete in practice because it is equated to a nominal sampling time in the noncompartmental pharmacokinetics approach. For a 2-treatment crossover design, a Hodges-Lehmann method exists for a confidence interval on treatment differences. For appropriately designed crossover studies with more than two treatments, a new median-scaling method is proposed to obtain estimates and confidence intervals for treatment effects. A simulation study was done comparing this new method with two previously described rank-based nonparametric methods, a stratified ranks method and a signed ranks method due to Ohrvik. The Normal theory, a nonparametric confidence interval approach without adjustment for periods, and a nonparametric bootstrap method were also compared. Results show that less dense sampling and period effects cause increases in confidence interval length. The Normal theory method can be liberal (i.e. less than nominal coverage) if there is a true treatment effect. The nonparametric methods tend to be conservative with regard to coverage probability and among them the median-scaling method is least conservative and has shortest confidence intervals. The stratified ranks method was the most conservative and had very long confidence intervals. The bootstrap method was generally less conservative than the median-scaling method, but it tended to have longer confidence intervals. Overall, the median-scaling method had the best combination of coverage and confidence interval length. All methods performed adequately with respect to bias.     

也谈杜牧李商隐之不相得——为董乃斌先生文献一证

李商隐和杜牧是晚唐两位杰出的诗人,李商隐有两首赠诗给杜牧,但杜牧没有回应。董乃斌先生撰文,从对党争的态度不同、文学观的不同、个性不同和两首诗本身四个方面分析比较,论述李杜二人交谊。董文侧重于对"李赠而杜不答"这一现象展开分析,中肯而有见;而对两首诗本身进行细读,并补刘蕡一例,或可为董文补充。