Simulation-Based Inspection Policies for a One-Shot System in Storage Over a Finite Time Span

In this paper, we consider an inspection policy problem for a one-shot system with two types of units over a finite time span and want to determine inspection intervals optimally with given replacement points of Type 2 units. The interval availability and life cycle cost are used as optimization criteria and estimated by simulation. Two optimization models are proposed to find the optimal inspection intervals for the exponential and general distributions. A heuristic method and a genetic algorithm are proposed to find the near-optimal inspection intervals, to satisfy the target interval availability and minimize the life-cycle cost. We study numerical examples to compare the heuristic method with the genetic algorithm and investigate the effect of model parameters to the optimal solutions.     

Effect of Inspection Error on Out-of-Control Average Run Length of CUSUM Charts

The cumulative sum (CUSUM) chart is commonly used for detecting small or moderate shifts in the fraction of defective manufactured items. However, its construction relies on the error-free inspection assumption, which can seldom be met in practice. In this article, we discuss the construction of an upward CUSUM chart in the presence of inspection error, study the effects of inspection error on the out-of-control ARL of the CUSUM chart, and present a formula for determining the sampling size that compensates for the effect of inspection error on the out-of-control ARL.     

A General Model for Repeated Audit Controls Using Monotone Subsampling

Abstract

In categorical repeated audit controls, fallible auditors classify sample elements in order to estimate the population fraction of elements in certain categories. To take possible misclassifications into account, subsequent checks are performed with a decreasing number of observations. In this paper a model is presented for a general repeated audit control system, where k subsequent auditors classify elements into r categories. Two different subsampling procedures will be discussed, named “stratified” and “random” sampling. Although these two sampling methods lead to different probability distributions, it is shown that the likelihood inferences are identical. The MLE are derived and the situations with undefined MLE are examined in detail; it is shown that an unbiased MLE can be obtained by stratified sampling. Three different methods for constructing confidence upper limits are discussed; the Bayesian upper limit seems to be the most satisfactory. Our theoretical results are applied to two cases with r = 2 and k = 2 or 3, respectively.     

北华大学学科建设的研究与实践

学科建设是大学建设的基础性工程,要充分认识到学科建设的必要性和紧迫性。加强学科建设的基本途径包括完善学科布局、提高学术水平、加强师资队伍建设等。     

高校纪检信访“文档一体化”管理初探

阐述了做好高校纪检信访管理工作的重要性和计算机管理的必要性,积极探索高校如何利用高校有利资源,搞好高校纪检信访件管理工作,努力实现高校纪检信访"文档一体化"管理,开创性地做好纪检信访立卷归档.     

长安之旅:康熙帝西巡探讨

康熙四十二年秋冬之际,康熙帝巡幸西安,以往被看作是经营和抚定蒙藏边疆之举,从西巡的主要内容来看,一是考察吏治民风,属于对内行政,也是儒家治国理念中强调的,借以表达对儒家治国政治文化的认同;另一方面是练兵阅军,强调军队的战斗力,表明重视骑射的清朝国策。康熙帝通过密切君主与臣民关系、祭奠山川与名人树立了认同儒家文化与中国历史的勤政爱民的圣君形象。无论是西巡的内容还是表达的意义,都在展示以儒家政治文化治国的象征性,阐释着统治的正统性与合法性。     

政治学家埃莉诺学术成就的学科价值诠释

埃莉诺·奥斯特罗姆以政治学家的身份获得2009年诺贝尔经济学奖在国内外政治学界和经济学界都引起了很大反响。立足于现代政治学在追求科学性过程中所处的较为落伍和弱势的窘境,分别从学科的科学地位、价值功用和发展走向三个维度,来阐释埃莉诺学术成就在学科层面上的价值,并从中揭示出理论研究和经验研究相结合、采用跨学科的研究方法、专一的学术研究志趣和多方的学术合作交流不仅是埃莉诺个人学术研究的成功之道,还是今后政治学发展的重要趋向。     

Do Arbitrators Use Just Cause Standards in Deciding Discharge and Discipline Cases? A Test

This study used a rule induction, as a form of “machine learning” for pattern recognition to examine an alleged common law put forward by Arbitrator Carroll Daugherty regarding key factors used by labor arbitrators in the United States to decide discipline and discharge cases. Control variables for public sector or private sector origin of the case and characteristics of the aggrieved employee(s) or of the arbitrator were not found to influence arbitral thought. However, the alleged common law identified by Carroll Daugherty provided a set of rules which had a hit ratio of nearly 90% indicating strong support for there actually being a common law developed over the period examined. This scientific evidence supports the hypothesized common law of just cause for discipline being applied by labor arbitrators. Further, the existence of such common law should provide greater predictability and consistency to disciplinary proceedings and may be useful in examining similarly situated decision-making activities in arbitration, law, and other professions.

从社会工作专业的特质看“专业导入教育”的课程设置

社会工作作为助人专业,需要社会工作者身体力行,社会工作在本质上是一种道德实践.在这个意义上,社会工作专业价值理念是社会工作专业的灵魂.社会工作专业的这一特质构成了社会工作专业教育的独特性.在专业教学中能否帮助学生建立起专业深层次的认同感和牢固的专业价值理念,是专业教育与专业发展的一个不容忽视的问题.本文作者在教学实践中,立足于本科生专业教学,将社会工作专业价值理念的教育作为一年级课程设置中"专业导入教育"的核心内容,在相互呼应的三个教学科目中完成这个内容的教学,在教学实践中提出了教师与学生共同成长的实践教学新思路.     

劳工品质、劳动保护与跨国资本空间转移——基于中印两国的比较研究

全球自由市场与低劳动力成本是比较优势模式发展的前提条件.劳工品质与资本流向正相关,劳动力价格、劳工技能以及劳工纪律性是劳工品质的基本内涵.劳工纪律性是社会建构的结果,政治机会结构与微观动员条件是两种主要的建构力量.较之于印度,劳工守规矩的品质是中国吸引资本的巨大优势.劳动保护需要与政治社会体制相匹配,这样才能实现与经济发展的均衡.中国不用担心劳工涨薪会导致资本外移,印度应该在政治社会结构允许的空间里一定程度地减少劳动保护,强化劳工纪律性.突破比较优势模式,通过产业升级完成经济增长方式的转型才是中印两国未来的根本出路.