树的圈上带宽和下界

给出了一些以顶点数、直径或独立数表示的树的圈上带宽和的下界，并以此计算了K1，n(星）和Wn 1（轮）的圈上带宽和。     

Detecting clusters with increased mean using scan windows with variable radius

Applying spatiotemporal scan statistics is an effective method to detect the clustering of mean shifts in many application fields. Although several exponentially weighted moving average (EWMA) based scan statistics have been proposed, the existing methods generally require a fixed scan window size or apply the weighting technique across the temporal axis only. However, the size of shift coverage is often unavailable in practical problems. Using a mismatching scan radius may mislead the size of cluster coverage in space or delay the time to detection. This research proposed an stEWMA method by applying the weighting technique across both temporal and spatial axes with variable scan radius. The simulation analysis showed that the stEWMA method can have a significantly shorter time to detection than the likelihood ratio-based scan statistic using variable scan radius, especially when cluster coverage size is small. The application to detecting the increase of male thyroid cancer in the New Mexico state also showed the effectiveness of the proposed method.     

Construction of Balanced Incomplete Block Designs Using Cyclic Shifts

Balanced incomplete block designs (BIBDs) play important role in design of experiments, especially in field experiments. These designs ensure that treatments are compared with equal precision. Several methods are available in the literature to construct BIBDs but in this article some infinite series of these designs are presented by method of cyclic shifts. This method expresses some standard properties of a design just through examining the sets of shifts rather than studying the whole design.     

A fast algorithm for constructing efficient event-related functional magnetic resonance imaging designs

We propose a novel, efficient approach for obtaining high-quality experimental designs for event-related functional magnetic resonance imaging (ER-fMRI), a popular brain mapping technique. Our proposed approach combines a greedy hill-climbing algorithm and a cyclic permutation method. When searching for optimal ER-fMRI designs, the proposed approach focuses only on a promising restricted class of designs with equal frequency of occurrence across stimulus types. The computational time is significantly reduced. We demonstrate that our proposed approach is very efficient compared with a recently proposed genetic algorithm approach. We also apply our approach in obtaining designs that are robust against misspecification of error correlations.     

A Comparison of Two Alternative Approaches to Modeling Level Shifts in the Presence of Outliers

Abstract

We study alternative models for capturing abrupt structural changes (level shifts) in a times series. The problem is confounded by the presence of transient outliers. We compare the performance of non-Gaussian time-varying parameter models and multiprocess mixture models within a Monte Carlo experimental setup. Our findings suggest that once we incorporate shocks with thick-tailed probability distributions, the superiority of the multiprocess mixture models over the time-varying parameter models, reported in an earlier study, disappears. The behavior of the two models, both in adapting to level shifts and in reacting to transient outliers, is very similar.     

Estimation of cyclic long-memory parameters

This paper studies cyclic long-memory processes with Gegenbauer-type spectral densities. For a semiparametric statistical model, new simultaneous estimates for singularity location and long-memory parameters are proposed. This generalized filtered method-of-moments approach is based on general filter transforms that include wavelet transformations as a particular case. It is proved that the estimates are almost surely convergent to the true values of parameters. Solutions of the estimation equations are studied, and adjusted statistics are proposed. Monte-Carlo study results are presented to confirm the theoretical findings.     

基于循环经济的资源节约型社会发展的思考

工业革命以后的先期工业化国家走的是以消耗和破坏自然资源换取经济增长的恶性循环道路。中国在童视经济发展总量和速度的同时，必须注意减少资源的消耗和环境的破坏。根据我国资源紧缺的基本国情，建设资源节约型社会，必须选择一条与发达国家不同的资源组合方式，即非传统的现代化道路，而循环经济是推进资源节约型社会发展的最有效的发展模式。     

Making Anew an Arab Regional Order? On Poetry,Sex, and Revolution

The protests and revolutions in the Middle East and North Africa (MENA) region define and exceed the imperialism's new manifestations and challenge the ‘stabilities’ and ‘business as usual’ in their moves to make anew the Arab region. Emerging revolutionary sexual poetics, I argue, ride the transformative power of the erotic while resisting and interrupting tired gendered and universal portrayals of the local-feminine backward East region and masculine rational forward West-global. The practical and conceptual shifts of the protests in the MENA present an energeia that disrupts ‘business as usual’ capitalism and substantively transforms power and sexual relations. The region's poetry (poems, slogans, songs) is an essential driver of this energeia which contests fetishized syndromes of transformation. In fact, in the MENA region, sex and poetics are major contestation sites of alternative ethical imperatives of being in time including practical and conceptual shifts in world-making projects.

Las protestas y revoluciones en el Medio Oriente y África del Norte (MENA, por sus siglas en inglés) definen y exceden a las nuevas manifestaciones imperiales y retan como siempre a las ‘estabilidades’ en sus movimientos para crear una nueva región árabe. Sostengo que la poética sexual incipiente recorre el poder transformativo del poder erótico, en tanto que las representaciones locales resistentes e interrumpidas atrasadas de género femenino de la región de oriente y las representaciones masculinas racionales, avanzan hacia el occidente global. Los cambios prácticos y conceptuales de las protestas de MENA presentan una energeia que deteriora al ‘capitalismo de siempre’ y transforma sustancialmente al poder y a las relaciones sexuales. La poética de la región (poemas, eslóganes y canciones) es una impulsora esencial de esta energeia que contradice a los síndromes fetichados de la transformación. De hecho, en la región de MENA, el sexo y la poética son puntos de mayor debate de imperativos éticos alternativos de hallarse a tiempo incluyendo cambios prácticos y conceptuales en la creación de proyectos mundiales.

中东及北非地区的抗议游行和革命,限定和超越了皇帝的新衣,它们刷新阿拉伯地区的行动挑战了所谓的“稳定”和“一切正常”。我认为,新兴的革命的性别诗学,乘情诗的转变性力量之势而上,同时抵制和打断了对地方—女性的落后东方地区和男性、理性的先进西方—全球地区所进行的疲惫不堪、性别的普世描摹。中东和北非地区的抗议在实践和概念上的转变提供了一种现实性,冲击了“一切照常”式的资本主义,也实实在在地改变了权力与性的关系。这一地区的诗作（诗歌、标语、歌曲）是这种现实性不可或缺的驱动力,争夺成为拜物教的转变综合症。事实上,在中东北非地区,性和诗学是替代性、务须及时的道德律令的主要争执场,包括创造世界的计划中实践和概念的转变。     

Nested coordinate descent algorithms for empirical likelihood

Empirical likelihood (EL) as a nonparametric approach has been demonstrated to have many desirable merits. While it has intensive development in methodological research, its practical application is less explored due to the requirements of intensive optimizations. Effective and stable algorithms therefore are highly desired for practical implementation of EL. This paper bears the effort to narrow the gap between methodological research and practical application of EL. We try to tackle the computation problems, which are considered difficult by practitioners, by introducing a nested coordinate descent algorithm and one modified version to EL. Coordinate descent as a class of convenient and robust algorithms has been shown in the existing literature to be effective in optimizations. We show that the nested coordinate descent algorithms can be conveniently and stably applied in general EL problems. The combination of nested coordinate descent with the MM algorithm further simplifies the computation. The nested coordinate descent algorithms are a natural and perfect match with inferences based on profile estimation and variable selection in high-dimensional data. Extensive examples are conducted to demonstrate the performance of the nested coordinate descent algorithms in the context of EL.     

Queer Youth in Educational Psychology Research

ABSTRACT

Despite greater social acceptance of individuals with diverse sexual identities across the world, queer students still experience greater bullying, poorer academic motivation, and lower school attendance than heterosexual students. Educational psychology could provide additional insight toward these experiences for queer students in school, but the field of educational psychology is often absent from research on queer students. To partially address this concern, the current article examines why researching queer students is important, reviews extant research on queer youth in predominant educational psychology journals, and provides potential avenues of future research. Further, the article explores protective factors that help queer students succeed in school.