Modified chain sampling plans for lot inspection by variables and attributes

The purpose of acceptance sampling is to develop decision rules to accept or reject production lots based on sample data. When testing is destructive or expensive, dependent sampling procedures cumulate results from several preceding lots. This chaining of past lot results reduces the required size of the samples. A large part of these procedures only chain past lot results when defects are found in the current sample. However, such selective use of past lot results only achieves a limited reduction of sample sizes. In this article, a modified approach for chaining past lot results is proposed that is less selective in its use of quality history and, as a result, requires a smaller sample size than the one required for commonly used dependent sampling procedures, such as multiple dependent sampling plans and chain sampling plans of Dodge. The proposed plans are applicable for inspection by attributes and inspection by variables. Several properties of their operating characteristic-curves are derived, and search procedures are given to select such modified chain sampling plans by using the two-point method.     

L'inspection du travail,un outil efficace quand les règles et sanctions varient selon les effectifs de l'entreprise? Analyse à partir du cas péruvien

L'auteure analyse l'effet de la rigueur du dispositif de mise en application de la législation sur le respect effectif des droits au travail lorsque les règles et sanctions dépendent des effectifs de l'entreprise. À partir de données de l'enquête auprès des ménages du Pérou (2008–2013), elle examine l'influence en la matière de facteurs déjà connus (effet dissuasif de l'inspection, glissement vers le secteur informel) mais aussi celui du «redimensionnement», stratégie utilisée par les employeurs pour se prévaloir de régimes plus favorables. Elle montre que l'intensité du dispositif de contrôle n'influe que modérément sur le degré de conformité. L'effet «redimensionnement» est lui aussi limité.     

美国视频通信市场的转型——付费视频内容转向互联网

本文概述了当前美国有线电视行业／付费视频行业的局势，以及一些重要问题和面临的挑战，展望了未来的视频市场，概述了一个未来视频／宽带市场的战略愿景，然后回归到政策建议及具体的立法和管制行动。这将帮助我们在最短的、可操作的时间内通向一个开放的、非歧视性的、无处不在的宽带网络。     

Sourcing with Deferred Payment and Inspection under Supplier Product Adulteration Risk

We study the deferred payment and inspection mechanisms for mitigating supplier product adulteration, with endogenous procurement decision and general defect discovery process. We first derive the optimal deferred payment contract, which reveals that either entire or partial deferral can arise, depending on the moral hazard severity and the information accumulation rate. Because of the supplier's incentive to adulterate, the optimal procurement quantity under deferred payment generally is smaller than the first‐best quantity. We then investigate the inspection mechanism and characterize the equilibrium. We find that under the inspection mechanism, the optimal procurement quantity is no less than the first best. A comparison between these two mechanisms shows that the deferred payment mechanism generally can outperform the inspection mechanism when either the market size is small or the profit margin is low. However, we find that these two mechanisms can also be complementary, for which we characterize a necessary condition.     

Inference on a progressive type I interval-censored truncated normal distribution

In this paper, we consider the problem of making statistical inference for a truncated normal distribution under progressive type I interval censoring. We obtain maximum likelihood estimators of unknown parameters using the expectation-maximization algorithm and in sequel, we also compute corresponding midpoint estimates of parameters. Estimation based on the probability plot method is also considered. Asymptotic confidence intervals of unknown parameters are constructed based on the observed Fisher information matrix. We obtain Bayes estimators of parameters with respect to informative and non-informative prior distributions under squared error and linex loss functions. We compute these estimates using the importance sampling procedure. The highest posterior density intervals of unknown parameters are constructed as well. We present a Monte Carlo simulation study to compare the performance of proposed point and interval estimators. Analysis of a real data set is also performed for illustration purposes. Finally, inspection times and optimal censoring plans based on the expected Fisher information matrix are discussed.     

论政府效能监察体系的构建

中国在进行廉政建设的同时,也在进行政府效能监察工作。效能监察是监察机关为维护公共利益对监察对象存在的不尽职、不正确尽职、影响其他人尽职,乃至玩忽职守渎职失职等违法、违纪行为进行的监督检查活动。由于理论支撑滞后和相对经验不足,至今没有形成公众认可的、在较大范围适用的政府效能监察体系。本文依据调查资料,分析了构建当代政府效能监察体系的实践基础,揭示了政府效能监察体系的内容结构,预测了政府效能监察的发展趋势,提出了健全和完善效能监察体系的措施。     

食品安检专业开设动物病理学课程的改革与探索

本文从专业现状及教学中存在的问题,对食品安检专业开设动物病理学课程的教学改革相关问题进行阐述,为全面培养高素质的食品安检专业人才提供经验。     

Double and group acceptance sampling plan for truncated life test based on inverse log-logistic distribution

This paper introduces a double and group acceptance sampling plans based on time truncated lifetimes when the lifetime of an item follows the inverse log-logistic (ILL) distribution with known shape parameter. The operating characteristic function and average sample number (ASN) values of the double acceptance sampling inspection plan are provided. The values of the minimum number of groups and operating characteristic function for various quality levels are obtained for a group acceptance sampling inspection plan. A comparative study between single acceptance sampling inspection plan and double acceptance sampling inspection plan is carried out in terms of sample size. One simulated example and four real-life examples are discussed to show the applicability of the proposed double and group acceptance sampling inspection plans for ILL distributed quality parameters.     

论苏区邮政检查的操作方法与纪律

为了获得情报,肃清内奸,加强宣传,反制敌方邮检,苏区实行了邮检制度。邮检对象包括：密写、密函信件,记录有军政情报内容的胶卷、录音带、录像带、报刊杂志,夹藏有显微点以及炸弹、毒品、恐吓信、内容反动的信件或者出版物。邮检方式主要有四种。对受检邮件的处理方式有三种。总之,苏区对邮检极为重视,除严格选拔邮检员外,还制定了纪律,操作也较规范。