论北朝西部审美观与盛唐美学思想的展开

我国西部自北朝以来发生的民族大融合及因之形成的西部审美观,已经渗入唐人思想文化风俗习惯亦即唐代社会文化生活的方方面面。盛唐美学思潮的全面展开,与北朝西部审美观的深远影响,有着千丝万缕的内在联系,此乃中国美学主潮在封建社会顶峰形成“盛唐气象”的力量之源。     

包头市中小学教育科研现状的调查分析与策略

以包头市中小学骨干教师为重点调查对象,通过问卷调查,着重从教育科研的意义、基础知识的储备、教科研方法的运用以及科研成果等方面分析,发现包头市中小学教科研现状不容乐观。提出相应策略,以推动包头市中小学教育科研的发展。     

在传统与现代之间:近代天津永租契约探微

朱文通以民国时期河北高等法院档案为个例对研究范式的多元化和中国近现代史研究的新动向展开探讨。文章认为,在历史研究中,运用新资料至关重要。民国时期河北高等法院档案资料具有重要学术价值,如能得到充分发掘利用,必将有力地促进中国近代史研究向纵深发展。肖红松对民国时期河北的烟毒吸食问题进行探讨后指出,河北烟毒的吸食群体总量在三十万人左右甚至更高,文章还对烟毒吸食群体以及烟毒吸食的蔓延趋势进行了多维度解读。王小梅以民国时期河北高等法院档案中的部分破产案卷为中心,对南京国民政府《破产法》的制定、实施及其所具有的作用、意义等情况进行了深刻剖析。任吉东探讨了近代天津永租房地契其在中国内部的固有形态以及在外力冲击下所产生的变化,阐释了天津土地契约形式在近代的蜕变,以及城市近代化过程中传统与现代的碰撞与融合。裴赞芬对中国继承法律文本的近代化、司法实践中的立嗣与女子继承权问题进行探讨后认为,民国时期近代继承法理念已从法律文本逐步渗入民间生活,实现了中国传统继承制度的近代嬗变。     

International-domestic linkages in a developing-country context: the case of the Rohingyas in Bangladesh

ABSTRACT

Since 1978, the Rohingya have been fleeing Myanmar and taking refuge in Bangladesh. The state of Bangladesh is not a signatory to the Geneva Convention and does not recognize refugee rights, but the initial experiences with the Rohingya refugee population led the government to create a temporary and ad hoc domestic policy advisory and refugee management system, which eventually became highly politicized. There was also some degree of slow “externalization” of policy advice through the involvement of international organizations from 2006–2007 onward, mainly through the participation of the United Nations High Commissioner for Refugees (UNHCR) and International Organization for Migration (IOM). Over 2017–2018, there was a massive influx of refugees from Myanmar to Bangladesh. The domestic advisory and refugee management system lacked the capacity to manage the crisis and had to quickly and greatly externalize policy advice and refugee management. The UNHCR and IOM came in with a host of international organizational networks and coordinated with each other and the state through a multi-sectoral approach to manage the crisis. This externalization led to the systematization and institutionalization of the state’s domestic advisory system. However the effect of externalization on politicization is equivocal; on the one hand it decreased politicization of the domestic policy advisory system, but on the other hand, it created new levels of politicization.     

呼市金河水厂螺栓球网架安装施工

本文介绍大跨度螺栓球网架分条滑移和大面积网架利用桅杆在四角点提升的施工过程。     

Detecting homogeneous segments in DNA sequences by using hidden Markov models

In recent years there has been a rapid growth in the amount of DNA being sequenced and in its availability through genetic databases. Statistical techniques which identify structure within these sequences can be of considerable assistance to molecular biologists particularly when they incorporate the discrete nature of changes caused by evolutionary processes. This paper focuses on the detection of homogeneous segments within heterogeneous DNA sequences. In particular, we study an intron from the chimpanzee α-fetoprotein gene; this protein plays an important role in the embryonic development of mammals. We present a Bayesian solution to this segmentation problem using a hidden Markov model implemented by Markov chain Monte Carlo methods. We consider the important practical problem of specifying informative prior knowledge about sequences of this type. Two Gibbs sampling algorithms are contrasted and the sensitivity of the analysis to the prior specification is investigated. Model selection and possible ways to overcome the label switching problem are also addressed. Our analysis of intron 7 identifies three distinct homogeneous segment types, two of which occur in more than one region, and one of which is reversible.     

Partial least squares estimator for single-index models

The partial least squares (PLS) approach first constructs new explanatory variables, known as factors (or components), which are linear combinations of available predictor variables. A small subset of these factors is then chosen and retained for prediction. We study the performance of PLS in estimating single-index models, especially when the predictor variables exhibit high collinearity. We show that PLS estimates are consistent up to a constant of proportionality. We present three simulation studies that compare the performance of PLS in estimating single-index models with that of sliced inverse regression (SIR). In the first two studies, we find that PLS performs better than SIR when collinearity exists. In the third study, we learn that PLS performs well even when there are multiple dependent variables, the link function is non-linear and the shape of the functional form is not known.     

Efficiency improvement from multiple perspectives: An application to Japanese banking industry

The current study focuses on efficiency improvement for banking systems from multiple perspectives, which have different definitions of input/output about various attributes of a banking system. In this research we utilize data envelopment analysis (DEA) and Nash bargaining game (NBG) theory to improve inefficient banks in order to: (1) Make the inefficient bank be the state of Pareto Optimality for multiple perspectives, which can avoid discontentment of some perspectives. (2) Improve a bank by changing its attributes and provide various improving schemes for decision makers. A numerical case study of Japanese banks is also given to show the results of equilibrium solution from multiple perspectives.     

Racial differences in high school dropout rates: An analysis of U.S. Metropolitan areas

In this paper, we explore the differences in high school dropout rates among white, black and Hispanic students in 275 U.S. Metropolitan Statistical Areas (MSAs) in 2000. Our analysis focuses on the impact of community and labor market conditions, in hopes of providing insight into the relationship between place and educational outcomes. The explanatory power of our regression models is mixed across racial groups, performing best for whites and Hispanics. Our results also indicate that community factors – most importantly, same-race adult educational attainment in the community, teenage birth rates and residential stability – have a greater impact on dropout rates than labor market factors. Our results suggest that as education reform moves toward broad-based solutions to improve student outcomes including dropout rates, it will be increasingly important to address the structural origins of inequality outside of schools.     

隐含概念漂移的数据流分类算法研究

数据流具有快速性、连续性、多变性及无限性等特性，使得传统的分类方法不再适用。由于数据流多变的特性，设计高效、高精度的分类算法是比较困难的。目前数据流在电信、网络等众多应用领域客观大量存在，因此研究快速的、精确的、稳定的数据流分类系统具有较高的理论价值和应用前景。近年来，大量的研究工作都旨在高效准确地解决隐含概念漂移的数据流的分类问题。本文研究了一些适合数据流的分类算法，根据算法主要思想的不同进行分类，根据每种思想的发展历程对其相应的算法进行论述，并对部分经典算法分析其处理概念漂移的性能，并对进一步可做的工作进行展望。