理性与非理性之辨：网络集群行为的产生及其演变

以南京大学小百合BBS使用者对"汉口路西延工程"的参与讨论为个案,通过对参与者的问卷调查分析及网上讨论的跟踪观察,发现发生在网络中的集群行为在初期存在着非理性的表现,并占据着讨论的主流,而理性观点则被淹没在讨论声中.但随着事件的发展及讨论的深入,客观、理性的声音逐步增强,并与非理性开始了交锋,影响着参与者的表达.在交锋中理性逐步占据主流,并最终实现了回归,引导着参与者做深入的思考.文章最后提出时这种理性的回归的思考:这种回归是否是真正意义上的回归,一个与此事件相关的事件的出现是否会再次引起讨论的高潮,又将会向什么方向演变.     

Semiparametric regression of clustered current status data

This paper discusses regression analysis of clustered current status data under semiparametric additive hazards models. In particular, we consider the situation when cluster sizes can be informative about correlated failure times from the same cluster. To address the problem, we present estimating equation-based estimation procedures and establish asymptotic properties of the resulting estimates. Finite sample performance of the proposed method is assessed through an extensive simulation study, which indicates the procedure works well. The method is applied to a motivating data set from a lung tumorigenicity study.     

工业取用水监测奇异数据挖掘与重构方法

提高工业取用水监测数据质量是目前国家水资源监控能力建设的重要内容,而奇异值问题已成为影响监测数据质量的关键短板。本文在解析现阶段工业取用水监测数据奇异值主要类型基础上,以国家水资源管理系统数据库中工业取用水监测数据为样本,利用小波变换模极大值模型提取工业取用水监测数据时频变化特征,并利用傅里叶函数对其残差序列进行修正,进而运用相对误差控制方法挖掘监测数据奇异值。在此基础上,采用混沌粒子群优化的最小二乘支持向量机模型重构填补奇异值数据。研究结果表明：小波变换模极大值模型能够较好地提取工业取用水监测数据序列的时频变化特征,但是同时容易导致监测数据的信息损失,利用傅里叶函数对小波变换进行残差修正则可进一步提升取用水监测数据序列的特征提取效果;以小波变换模极大值特征序列为基础,通过相对误差控制可实现对监测数据奇异值的高效挖掘;对于挖掘出的奇异值重构填补问题,可选取混沌粒子群优化的最小二乘支持向量机模型,其重构精度要优于多项式曲线拟合等传统统计学方法和普通最小二乘支持向量机模型。上述工业取用水监测数据奇异值挖掘重构策略为现阶段国家水资源监控能力建设的推进提供了重要技术方法支持。     

Impact of mindful self-care and perceived stress on the health related quality of life among young-adult students in West Virginia

ABSTRACT

There are substantial gaps in research on Health Related Quality of Life (HRQoL) in students aged 18 and above in West Virginia. The purpose of this study is to explore the associations between mindful self-care, perceived stress, and the HRQoL in this population. We conducted a cross-sectional study between March and April 2017. We included participants who were students, aged 18 years and above, living in West Virginia and were able to answer online questions in English. Data was obtained from an online survey using a structured questionnaire, including the SF12v2®, mindful self-care scale- SHORT, and Perceived Stress Scale (PSS)-10. We applied linear regressions to determine the predictors of HRQoL (physical health and mental health) using SF12v2®. 194 participants met the inclusion criteria of the study. Mindful self-care was negatively associated with perceived stress. Better mindful self-care mediated the relationship between perceived stress and psychological well-being, controlling for gender, age, race, marital status, education level, annual household income, and chronic disease status. Perceived stress and mindful self-care were not related to the physical well-being. Better mindful self-care may safeguard against perceived stress among students aged 18 years and above. Our findings in this study recommend more mindfulness-based interventions targeted to this subpopulation to improve psychological well-being.     

Data‐Driven Supply Chain Orientation and Financial Performance: The Moderating Effect of Innovation‐Focused Complementary Assets

Drawing on the complementary assets framework, this study explores the moderating effect of innovation‐focused complementary assets (CA‐I) on the relationship between a data‐driven supply chain orientation (DDSCO) and firm financial performance. To test the moderating effect, survey data gathered from 329 manufacturing firms in China were analysed using a moderated regression analysis. The results indicate that DDSCO has a significant positive effect on financial performance, and that capabilities for product and process innovation function as complementary assets moderating the DDSCO–performance relationship. The findings suggest that innovation‐focused complementary assets are performance differentiators when paired with a DDSCO and explain why some firms obtain financial benefits from the development of a DDSCO while others do not. Specifically, competitive advantage from a DDSCO may not be realized unless CA‐I and potentially other complementary assets are harnessed, thus providing useful practical guidance to managers. Hence, the study provides empirical support for the complementary assets framework.     

民事责任归责问题的理论思考

民事责任的归责是指民事行为人违反法定义务或约定义务后,依什么为根据来使行为人承担强制性的不利后果。民事责任的归责基础是民事违约行为或违法行为对他人的权利或利益造成了损害。民事责任的归责基础和归责要素是两个既有区别又有联系的概念。由行为、损害、过错、因果关系、主体的特殊角色的不同组合构成了民事责任归责要素的内容。确定民事责任的归责原则需考虑以下规则:合理性规则、公正性规则、可操作性规则和逻辑性规则。     

四川省星级饭店发展战略研究

饭店作为旅游业发展的三大支柱之一 ,是旅游经济发展的主要生产力。根据 2 0 0 3年四川省旅游发展大会所制定的全省旅游发展战略 ,四川省星级饭店建设应按照以下思路进行 :政府主导 ,合理布局 ,提升“三性” ,强化特色。     

中国农村劳动力转移的研究:一个文献综述

在实行改革开放之前,中国曾经是一个人口流动率极低的国家。而自20世纪80年代中期以来,中国的农村劳动力开始大规模向当地乡镇企业以及异地转移。这种大规模的农村劳动力转移已经吸引了社会各界的关注,并成为许多学者研究和讨论的热门话题。关于中国农村劳动力转移的研究已经非常丰富,本文试图从劳动力转移的历史背景、转移状况、影响转移的因素以及转移所带来的影响等角度,对中国农村劳动力转移的研究进行系统的全面回顾,并指出未来需要进一步深入研究的问题。     

苗族婚姻制度变迁六十年——以贵州省施秉县夯巴寨为例

半个多世纪以来,苗族婚姻制度发生了诸多变迁。本文聚焦于游方、婚姻仪式、两性距离与婚姻限制等要素来揭示婚姻制度的变迁。这些变迁与国家意志、市场原则、大众媒体、社会时尚、科学知识与文化传统等因素相关。这些因素分别作用于婚姻制度的各个层面,并促使其发生牵连性的变迁。     

生态博物馆的文化遗产保护理念与基本原则——以贵州梭嘎生态博物馆为例

生态博物馆已成为一种全球范围内普遍流行的文化遗产保护模式;在保护实践中,只有遵循生态性、开放性、主体性的基本原则,其文化遗产保护才能取得成效;中国首座生态博物馆--贵州六枝梭嘎生态博物馆的经验就是例证.