Hamiltonian numbers in oriented graphs

A hamiltonian walk of a digraph is a closed spanning directed walk with minimum length in the digraph. The length of a hamiltonian walk in a digraph D is called the hamiltonian number of D, denoted by h(D). In Chang and Tong (J Comb Optim 25:694–701, 2013), Chang and Tong proved that for a strongly connected digraph D of order n, \(n\le h(D)\le \lfloor \frac{(n+1)^2}{4} \rfloor \), and characterized the strongly connected digraphs of order n with hamiltonian number \(\lfloor \frac{(n+1)^2}{4} \rfloor \). In the paper, we characterized the strongly connected digraphs of order n with hamiltonian number \(\lfloor \frac{(n+1)^2}{4} \rfloor -1\) and show that for any triple of integers n, k and t with \(n\ge 5\), \(n\ge k\ge 3\) and \(t\ge 0\), there is a class of nonisomorphic digraphs with order n and hamiltonian number \(n(n-k+1)-t\).     

自我与他者的纠缠:90年代以来文学的身份认同问题

20世纪90年代以来,伴随着消费主义文化思潮的勃兴,尤其是全球化语境的迅速弥漫,身份认同问题较以往越发凸显,并由此引发了一系列的认同焦虑与危机.在文学上,从人文精神讨论、<废都>论争到世纪末的"断裂"事件及网络文学的崛起等,莫不与身份认同的危机和重新定位息息相关.身份认同的危机包含自我认同、性别认同、代际认同、民族认同、政治认同等既有联系又有区别的不同层面.     

产业发展视角的城市贫困剖解：以西安纺织城为例

现阶段学术界对贫困问题的研究,主要围绕农村贫困展开,较少关注城市人口。以西安纺织城为切入点,结合地区经济特点,对该地区城市贫困问题的现状、成因及对策进行分析。结果显示,该地区城市贫困主要是因为地区产业发展的负累。因此,宏观层面城市反贫困的构架应该以产业振兴为载体,以地区振兴和地区融合为基点展开;从微观层面看,应注意将产业调整和企业产权改革相结合,将人力资本计划的制订和社会关系网的构建结合起来。     

中美石油安全水平对经济增长影响的对比研究——基于灰色关联分析

为科学地评价比较中美石油安全水平对经济增长的影响程度,文章采用主成分分析方法,选取采储比水平、储量接替率、消费弹性系数、原油价格波动系数、对外依存度和石油占一次能源消费比重等6个要素指标,构成一个新的石油安全指标评价体系,并利用灰色关联方法比较分析了不同时间段内中美两国的石油安全水平与经济增长之间的关联度,得出自21世纪以来,美国经济发展对石油安全水平的依赖程度要远大于中国的结论。     

突发公共事件的信息公开与传媒的宣泄功能

我国已进入突发公共事件高发期,其原因同社会结构调整、腐败滋生、法律供给不足、政治体制改革滞后以及缺乏舆论表达足够空间有关.主张加大突发公共事件信息公开与新闻报道力度.大众传媒是能够满足人们宣泄需求的有效载体和手段,充分实施传媒的宣泄功能有助于减少突发公共事件的发生频度.为实现突发公共事件信息公开与信息调控的平衡,政府、传媒和新闻工作者要做一系列工作,同时要抓紧制定传媒应对突发公共事件的规制和行为准则.     

The Aging Semantic Differential in Mandarin Chinese: Measuring Attitudes toward Older Adults in China

ABSTRACT

The Aging Semantic Differential (ASD) is the most widely used instrument to measure young people’s attitudes towards older adults. This study translated the ASD to Mandarin and examined its psychometric properties. The Mandarin-ASD contains three latent factors (Personality and Mental Health, Societal Participation, and Physical) that have high internal reliability and reasonable discriminate validity. Social work researchers, practitioners and allied professionals may utilize the ASD-Mandarin instrument to measure young people’s attitudes towards older adults in China. We issue a call for a universal-ASD that can be applied across different cultural contexts.     

Subtyping Non-treatment-seeking Problem Gamblers Using the Pathways Model

This study examined whether distinct subgroups could be identified among a sample of non-treatment-seeking problem and pathological/disordered gamblers (PG) using Blaszczynski and Nower’s (Addiction 97:487–499, 2002) pathways model (N = 150, 50% female). We examined coping motives for gambling, childhood trauma, boredom proneness, risk-taking, impulsivity, attention-deficit/hyperactivity disorder (ADHD), and antisocial personality disorder as defining variables in a hierarchical cluster analysis to identify subgroups. Subgroup differences in gambling, psychiatric, and demographic variables were also assessed to establish concurrent validity. Consistent with the pathways model, our analyses identified three gambling subgroups: (1) behaviorally conditioned (BC), (2) emotionally vulnerable (EV), and (3) antisocial-impulsivist (AI) gamblers. BC gamblers (n = 47) reported the lowest levels of lifetime depression, anxiety, gambling severity, and interest in problem gambling treatment. EV gamblers (n = 53) reported the highest levels of childhood trauma, motivation to gamble to cope with negative emotions, gambling-related suicidal ideation, and family history of gambling problems. AI gamblers (n = 50) reported the highest levels of antisocial personality disorder and ADHD symptoms, as well as higher rates of impulsivity and risk-taking than EV gamblers. The findings provide evidence for the validity of the pathways model as a framework for conceptualizing PG subtypes in a non-treatment-seeking sample, and underscore the importance of tailoring treatment approaches to meet the respective clinical needs of these subtypes.     

第三条道路视域下的治理变革:一个嵌入性视角

伴随着“第三条道路”的兴起,政府治理必须超越传统的“左与右”之分,这既是对我国传统治理模式的批判性反思,更是新形势下社会管理创新的客观要求.本文从新经济社会学中的“嵌入性”理论入手,对国家、市场与社会三者之间的互动关系进行了再解读,提倡一种“嵌入式”的结构多元主义治理模式.