Data tilting for time series

Summary. We develop a general methodology for tilting time series data. Attention is focused on a large class of regression problems, where errors are expressed through autoregressive processes. The class has a range of important applications and in the context of our work may be used to illustrate the application of tilting methods to interval estimation in regression, robust statistical inference and estimation subject to constraints. The method can be viewed as 'empirical likelihood with nuisance parameters'.     

现阶段村民自治运作中的权力博弈

村民自治的运作实际是村落场域内各权力主体之间的博弈过程。在现阶段中国农村村民自治运作中,权力博弈场内的主要局中人是政府、村干部、头面人物、普通村民。由于受村落场域多元性的影响,各类村庄权力主体在不同村庄的公共权力体系中所处的地位和发挥的作用有所差异,因此形成了干部支配型、精英主导型、群众自治型等多种村庄权力结构。村民自治运作中的权力博弈势必导致各类权力主体在村庄公共权力体系中的地位和作用的改变,并引起村庄权力结构的变迁。     

从创新中塑造企业核心竞争力

在市场边界瞬息万变的复杂商业环境下 ,只有真正具有核心竞争力的企业才可能驾驭市场 ,实现可持续发展。而核心竞争力来自于不断的创新 ,企业的核心竞争力要从技术、产品、管理和营销的创新中加以创造     

A toolbox for public relations: The oeuvre of Michel Foucault

In this article, we provide a brief introduction to the work of Michel Foucault. Our focus is on the major themes of Foucault's work: discourse, power/knowledge and subjectivity. We demonstrate the rich contribution that Foucauldian theory can make to public relations practice and scholarship by moving beyond a focus on excellence towards an understanding of public relations as a discourse practice with power effects.     

公共行政道德建设浅析

实现以德治国,提升整个社会的道德水准,只有加快以限权为中心的政府体制改革,改变政府的不道德作为,推进行政道德的法制化建设,加强行政人员的思想道德教育,建立道德的社会惩戒机制,把道德考核作为职务晋升的重要依据,才能实现高度的政治文明、精神文明和物质文明。     

用于分散电压控制的规则库法

电力系统正常运行时,无功/电压控制目的是安全经济供电.而在紧急情况下,首要目标是运行的安全性,其次才是经济性.本文提出的局部网概念及其灵敏度矩阵,以及对电压违限严重性的分级和控制战略,使控制更为快速有效.此法更适用于当事故引起全系统运行数据不全时对局部网的电压控制.     

An empirical likelihood goodness-of-fit test for time series

Summary. Standard goodness-of-fit tests for a parametric regression model against a series of nonparametric alternatives are based on residuals arising from a fitted model. When a parametric regression model is compared with a nonparametric model, goodness-of-fit testing can be naturally approached by evaluating the likelihood of the parametric model within a nonparametric framework. We employ the empirical likelihood for an α -mixing process to formulate a test statistic that measures the goodness of fit of a parametric regression model. The technique is based on a comparison with kernel smoothing estimators. The empirical likelihood formulation of the test has two attractive features. One is its automatic consideration of the variation that is associated with the nonparametric fit due to empirical likelihood's ability to Studentize internally. The other is that the asymptotic distribution of the test statistic is free of unknown parameters, avoiding plug-in estimation. We apply the test to a discretized diffusion model which has recently been considered in financial market analysis.     

托马斯·阿奎那论宗教与政治

作为神学家和西方教会的代言人,阿奎那深入讨论了宗教与政治的关系问题,包括如何协调教权与王权的关系、如何对待异教徒、如何对待叛教者等。针对不同情况,他的政策也不相同,但其目的只有一个:在保持基督教国家内部稳定的前提下,打击异教力量和异端分子,维护和加强教会的势力。     

Evaluation: Stakeholder-focused Criteria

Identifying and selecting suitable criteria is an important consideration in evaluating the performance of public sector organizations. Which criteria are chosen, and how they are weighted, will depend largely on the perspective being taken; different stakeholders (for example, clients, providers or commissioners) are likely to emphasize different criteria. In this paper a number of criteria are identified and an argument is developed to indicate which criteria are likely to be valued by various stakeholders. Furthermore, a number of approaches and mechanisms for evaluation are identified and the links between these, the criteria appropriate to them and the various stakeholders are made explicit. Finally, the issue of politics and the distribution of power between the stakeholders is addressed with a call for greater explicitness in using and balancing criteria (for example, as between professionals and the intended beneficiaries of services). In this way, while recognizing the inherent political nature of performance evaluation, the planning and implementation of services may be improved by a more mutually informed approach to evaluation.     

Minimum power assignment in wireless ad hoc networks with spanner property

Power assignment for wireless ad hoc networks is to assign a power for each wireless node such that the induced communication graph has some required properties. Recently research efforts have focused on finding the minimum power assignment to guarantee the connectivity or fault-tolerance of the network. In this paper, we study a new problem of finding the power assignment such that the induced communication graph is a spanner for the original communication graph when all nodes have the maximum power. Here, a spanner means that the length of the shortest path in the induced communication graph is at most a constant times of the length of the shortest path in the original communication graph. Polynomial time algorithm is given to minimize the maximum assigned power with spanner property. The algorithm also works for any other property that can be tested in polynomial time and is monotone. We then give a polynomial time approximation method to minimize the total transmission radius of all nodes. Finally, we propose two heuristics and conduct extensive simulations to study their performance when we aim to minimize the total assigned power of all nodes. The author is partially supported by NSF CCR-0311174.