Parameterized algorithms for min–max 2-cluster editing

For a given graph and an integer t, the Min–Max 2-Clustering problem asks if there exists a modification of a given graph into two maximal disjoint cliques by inserting or deleting edges such that the number of the editing edges incident to each vertex is at most t. It has been shown that the problem can be solved in polynomial time for \(t<n/4\), where n is the number of vertices. In this paper, we design parameterized algorithms for different ranges of t. Let \(k=t-n/4\). We show that the problem is polynomial-time solvable when roughly \(k<\sqrt{n/32}\). When \(k\in o(n)\), we design a randomized and a deterministic algorithm with sub-exponential time parameterized complexity, i.e., the problem is in SUBEPT. We also show that the problem can be solved in \(O({2}^{n/r}\cdot n^2)\) time for \(k<n/12\) and in \(O(n^2\cdot 2^{3n/4+k})\) time for \(n/12\le k< n/4\), where \(r=2+\lfloor (n/4-3k-2)/(2k+1) \rfloor \ge 2\).     

Characteristics of atmospheric PM2.5 in stands and non-forest cover sites across urban-rural areas in Beijing,China

Urban Ecosystems - Monitoring air pollution at a city scale is essential for controlling urban air pollution in cities, especially megacities, in China. In this paper, data for 1 city center site...     

Financial Knowledge and Behaviors of Chinese Migrant Workers: An International Perspective on a Financially Vulnerable Population

ABSTRACT

Making informed financial decisions is crucial to the wellbeing of Chinese migrant workers. Using interview survey data (N = 329), this study examined financial knowledge and behaviors of migrant workers in China. Results showed that participants demonstrated low levels of financial knowledge (51.4%) and beneficial financial behaviors (51.0%). Multivariate results indicated that a modest proportion of the variance in financial behaviors was explained by financial knowledge, attitudes, and socio-demographic characteristics (e.g., marital status and income). Findings underscore the importance of disseminating culturally-relevant educational interventions to financially at-risk, low-paid migrant workers in China.     

A global count of the extreme poor in 2012: data issues,methodology and initial results

The 2014 release of a new set of purchasing power parity (PPP) conversion factors (PPPs) for 2011 has prompted a revision of the World Bank’s international poverty line. In revising the line, we have sought to minimize changes to the real purchasing power of the earlier $1.25 line (in 2005 PPPs), so as to preserve the integrity of the goalposts for international targets such as the Sustainable Development Goals (SDGs) and the World Bank’s twin goals – which were set with respect to that line. In particular, the new line was obtained by inflating the same fifteen national poverty lines – originally used by Ravallion et al. (World Bank Econ. Rev. 23(2): 163–184 2009) to construct the $1.25 line – to 2011 prices in local currency units, and then converting them to US dollars using 2011 PPP conversion factors. With a small approximation, this procedure yields a new international poverty line of $1.90 per person per day. In combination with other changes described in the paper, this revision leads to relatively small changes in global poverty incidence for 2011: from 14.5 % using the old method to 14.1 % using the new method. In 2012, the new reference year for the global count, we find 12.7 % of the world’s population, or 897 million people, are living in extreme poverty. There are changes in the regional composition of poverty, but they are also relatively small. This paper documents methodological decisions taken in the process of updating both the poverty line and the consumption and income distributions at the country level, including issues of inter-temporal and spatial price adjustments. It also describes various caveats and limitations of the approach taken.     

广州市农村留守儿童问题研究

基于问卷调查研究广州市农村留守儿童问题。调查显示,广州存在农村留守儿童及其问题,但是,广州农村留守儿童问题程度相对较轻。根本原因是广州作为改革开放的前沿阵地,城乡经济社会发展和二元结构改革取得了重大进展。对广州农村留守儿童问题不能听之任之,要加强农村留守儿童的家庭监护主体责任和学校关爱保护工作。     

The classing gaze and its gendering effects: (dis)‐respectability,emotional (in)‐competency,and the counselling experiences of domestically violent Taiwanese men

Research on domestically violent men typically takes an oppositional logic of gender. While the significance of class in researching domestically violent men is identified, class and gender are often treated as separate entities that do not complicate each other. Drawing upon group observations and in‐depth interviews, this paper identifies how intersections of class and gender manifest in the counselling experiences of domestically violent Taiwanese men. From a Bourdieusian feminist analysis, the authors analyse (1) how class distinctions serve to (re)produce gendered hierarchy; (2) how contradictory experiences of gender reveal a relational understanding of class; and (3) how the gendered nature of domestically violent men is inscribed with a meaning of (working) class specificity for maintaining middle‐class ‘purity’. In analysing men's multiple and conflicting experiences, this paper contributes to research on domestically violent men by showing how class and gender are actively constructed and not produced in a monolithic/invariant way.     

西方经济学“三一复合教学模式”探索

＂三一复合教学模式＂,是指以培养学生的专业素养与经济思维方式和综合适应能力为目标,以师生双向互动为中心,以拓展教学空间和加强实践活动为手段,在每一个教学单元中实施讲授一个基本理论,从事一次实践演练,进行一次主题研讨的教学环节,以综合整体效应提升教学实效的教学模式。该教学模式具有丰富听课体验、强化思考体验、增强实践体验三方面的功能。该模式具有易于操作、主体受益面大、师生互动性强、效果系统连贯等优点。     

思想政治教育经济价值新探

思想政治教育经济价值,是指思想政治教育劳动所创造的能促进社会经济增长和发展,满足人们物质和精神需要的效应。思想政治教育在具有一般事物所拥有的性质和特点的同时,还具有其自身特有的属性及表现形态。思想政治教育经济价值具有依存性、间接性、多端性和两面性的基本特点。思想政治教育有助于及时更新经济发展理念,科学选择评价经济活动的标准,优化经济活动结构。     

黎族与南方百越后裔诸民族民俗比较研究

本文从水的崇拜、传统节日、文身和口头语言民俗等层面,对黎族与南方百越后裔诸民族民俗加以比较研究。     

探析微博在高职高专艺术类专业英语教学中的应用

本文探讨微博用于高职高专艺术类专业英语教学的教学模式,并辅以教学实例进行解析,为英语教学提供了新视角。