Feature selection based on distance correlation: a filter algorithm

Feature selection (FS) is one of the most powerful techniques to cope with the curse of dimensionality. In the study, a new filter approach to feature selection based on distance correlation is presented (DCFS, for short), which keeps the model-free advantage without any pre-specified parameters. Our method consists of two steps: hard step (forward selection) and soft step (backward selection). In the hard step, two types of associations, between univariate feature and the classes and between group feature and the classes, are involved to pick out the most relevant features with respect to the target classes. Due to the strict screening condition in the first step, some of the useful features are likely removed. Therefore, in the soft step, a feature-relationship gain (like feature score) based on the distance correlation is introduced, which is concerned with five kinds of associations. We sort the feature gain values and implement the backward selection procedure until the errors stop declining. The simulation results show that our method becomes more competitive on several datasets compared with some of the representative feature selection methods based on several classification models.     

考虑脉冲现象的复杂供应链系统及其稳定策略

供应链系统是一个复杂的系统,一方面由于时间延迟、信息不对称及反馈机制等,会产生牛鞭效应,另一方面供应链具有需求突增或骤减的脉冲特点,上述现象都可能导致供应链系统混沌,而现有的供应链模型仅考虑了“牛鞭效应”,并未考虑脉冲现象对供应链系统的影响。文章建立了考虑脉冲现象的供应链模型,分析了脉冲现象对供应链系统的影响,并给出了使供应链系统稳定的策略,讨论了参数扰动对该模型的影响,通过数值算例验证了稳定策略的有效性。研究发现:脉冲现象对供应链系统有着显著影响,但只要选取恰当的脉冲强度和脉冲时间间隔,供应链系统是可以稳定的。     

学术史研究及其在学科发展中的意义——以叙事学与比较叙事学为例

在学科的形成与发展中,对学科学术史的梳理是一项富于意义的工作.通过对学科纵向发展进程与横向扩展过程的考察,辨认其发展的轨迹,探寻其相关理论资源的源流,学科名称与核心概念的形成与确认,其实际研究逐渐扩展的进程,既与某些相邻学科发生部分重合、又超越它们并凸显出自身学科特征的状况等,将可以厘定学科发展的方向,发挥相关的学科优势,更好地促使新学科健康有益地成长.     

《挂枝儿》语词拾零

明代冯梦龙编辑的民歌集<挂枝儿>保留了相当数量的新兴的口语成分原貌,是研究明代词语的宝库.这些材料虽经学者发明,但仍有新词新义值得作进一步梳理.例如波一向的当寡茶闯寡门统口一丢等等.这些词语不仅大型语言词典失收,其他论文论著也少提及.此文训释词语10条.     

State of the Art in Risk Analysis of Workforce Criticality Influencing Disaster Preparedness for Interdependent Systems

The objective of this article is to discuss a needed paradigm shift in disaster risk analysis to emphasize the role of the workforce in managing the recovery of interdependent infrastructure and economic systems. Much of the work that has been done on disaster risk analysis has focused primarily on preparedness and recovery strategies for disrupted infrastructure systems. The reliability of systems such as transportation, electric power, and telecommunications is crucial in sustaining business processes, supply chains, and regional livelihoods, as well as ensuring the availability of vital services in the aftermath of disasters. There has been a growing momentum in recognizing workforce criticality in the aftermath of disasters; nevertheless, significant gaps still remain in modeling, assessing, and managing workforce disruptions and their associated ripple effects to other interdependent systems. The workforce plays a pivotal role in ensuring that a disrupted region continues to function and subsequently recover from the adverse effects of disasters. With this in mind, this article presents a review of recent studies that have underscored the criticality of workforce sectors in formulating synergistic preparedness and recovery policies for interdependent infrastructure and regional economic systems.     

有机硼交联HPG压裂液超低温破胶剂室内研究

对埋藏浅,油层温度低的油藏进行压裂改造,需解决压裂液低温破胶水化的问题。采用活化剂来提高过硫酸铵(APS),酶,胶囊破胶剂的低温破胶能力。通过对有机硼交联的羟丙基瓜胶(HPG)压裂液低温下破胶后粘度损失率的测定,筛选出用于50℃下的APS/活化剂破胶系统及胶囊破胶剂。结果表明:在APS/活化剂破胶系统的作用下,采用有机硼作交联剂的HPG压裂液在较低温度条件下能彻底破胶水化。     

一场声势浩大的新闻事件策划——浅析《金沙》的推广宣传策略

“新闻事件策划”这个命题自上世纪九十年代中期被提出以后,长期受到广泛争议和关注。在笔者的研究中,以一系列新闻事件策划的理论和实践研究成果为评判标准,主要关注成都市历时打造一年的文化名片“金沙”,以及作为媒体聚焦点的《金沙》音乐剧。在分析“金沙”成功的造势背后,揭示这条“金光闪闪”的文化产业链运作的新思路。     

略论英美宪法对公民人身权利的保护及对我国的启示

英美宪法比较重视对公民人身权利的保障,如对公民人身权利规定得比较全面详细,对逮捕、拘禁、拘留、搜查等措施规定了具体而严格的条件,并特别要求说明采取这些措施的理由;对公民人身权利的限制或剥夺必须遵循正当法律程序;确立了人身保护令状制度;重申了刑法或刑事诉讼法的一些基本原则等。这些"他山之石",对解决我国公民人身权利的保障问题具有一定的启示作用。     

Reading your Counterpart: The Benefit of Emotion Recognition Accuracy for Effectiveness in Negotiation

Using meta-analysis, we find a consistent positive correlation between emotion recognition accuracy (ERA) and goal-oriented performance. However, this existing research relies primarily on subjective perceptions of performance. The current study tested the impact of ERA on objective performance in a mixed-motive buyer-seller negotiation exercise. Greater recognition of posed facial expressions predicted better objective outcomes for participants from Singapore playing the role of seller, both in terms of creating value and claiming a greater share for themselves. The present study is distinct from past research on the effects of individual differences on negotiation outcomes in that it uses a performance-based test rather than self-reported measure. These results add to evidence for the predictive validity of emotion recognition measures on practical outcomes.