考虑消费者网购体验滞后的产品定价研究

随着电子商务技术的发展，网络购物越来越便利。与此同时，网络购物带来的产品体验滞后也导致了消费者对产品的认知不确定性。而这种不确定性正在成为消费者策略性退货行为的主要原因，如消费者同时购买多件具有横向差异的产品，在收到货物后经亲身体验后保留一件而将其他产品退货。本文通过构建Hotelling模型，探讨了企业在考虑此种影响情况下的最优定价策略，分析得出：当消费者的退货成本增加时，企业最优定价也随之增加；消费者对产品的先验效用差异化越小，企业的最优定价也越低。同时发现，若某种产品无消费者单独购买，企业的最优定价会随消费者偏好的增加而增加；而当两种产品均有消费者单独购买且消费者退货成本较大时，企业的最优定价不但不会随消费者偏好的增加而提高，反而会随消费者偏好增加而减少。此外，本文给出了消费者策略性退货行为存在的临界条件，当消费者的退货成本高于这一临界条件时消费者的策略退货行为将消失。     

“通知—删除”规则在电子商务专利侵权中的适用——兼论《民法典》第1195条

随着电子商务的蓬勃发展，“通知—删除”规则在有效制止电子商务专利侵权中具有重要作用。我国在21世纪初引进“通知—删除”规则，逐步构建了适用于电子商务领域专利侵权的“通知—删除”规则。《民法典》正式施行以来，“通知—删除”规则在适用于电子商务专利侵权中暴露出诸多问题：存在规则滥用隐患，权利人与商家利益失衡，通知与反通知的审核标准难以一致，因错误通知造成商家损失难以恢复，等等。解决好这些问题，需从专利侵权的特殊性出发，贴合《民法典》第1195条的规定，遵循“通知—删除”规则的立法目的进行解释适用；应重视和探索电子商务平台的自治能力，推动“通知—删除”规则在电子商务专利侵权中的解释适用。     

Delay causes analysis in complex construction projects: a Semantic Network Analysis approach

Delays are among the most crucial adversaries to the success and performance of construction projects, making delay analysis and management a critical task for project managers. This task will be highly complicated in large-scale projects such as construction, which usually consist of a complex network of heterogeneous entities in continuous interaction. Traditional approaches and methods for the analysis of delays and their causes have been criticised for their ability to handle complex projects, and for considering the interrelationships between delay causes. Addressing this gap, this research introduces an alternative approach for delay causes analysis by adopting Semantic Network Analysis (SNA) method. The paper reports the results from an investigation of delays in construction projects in the Oil-Gas-Petrochemical sector using SNA. The method’s capacity to identify and rank delay causes, which can assist managers in selecting appropriate measures for eliminating them, are empirically examined and discussed. The paper argues that SNA leads to a more comprehensive understanding of the main causes of delay in large and complex projects, allowing a better identification and mapping of the interrelationships between these discrete factors.     

高校工会为非编制人员维权服务的现状与策略创新研究 ——以S省高校为例

维护职工合法权益是工会的基本职责。近年来高校工会工作对象从编制内人员扩展到非编制人员,维权服务工作面临着新的问题和挑战。基于S省高校的抽样调查数据与深度访谈资料显示,各高校在签订劳动合同、缴纳社会保险等方面都能按照要求规范进行,能按时足额发放薪酬,有相应的制度和管理规范,非编制人员的基本权益得到了保障。各高校工会组织积极履职,提高非编制人员的组织化程度和维权意识,帮助他们反映合理诉求,维护和保障非编制人员的合法权益,保证了职工队伍的稳定和谐。但也存在着工会维权职能发挥不充分,法治方式运用不足;工会制度不到位,维权机制不健全;工会主动作为不够,作用发挥不充分等问题。因此,创新高校工会非编制人员维权工作,必须加强法治思维,树立依法维权的理念;加强制度建设,完善工会维权机制;加强人文关怀,发挥工会桥梁和纽带作用。     

Inaction over retractions of identified fraudulent publications: ongoing weakness in the system of scientific self-correction

Published articles may be retracted when their findings are no longer considered reliable due to honest error, publication misconduct, or research misconduct. This article focuses on the case of a single serial violator of research and publication ethics in anesthesiology and critical care, which is widely publicized. A chain of events led to detection of misconduct that had substantial impact on the evidence base for the safety of hydroxyethyl starch, an intravenous artificial colloid solution, which is reflected in current guidelines on fluid management and volume resuscitation. As citations to retracted works continue to be a cause for concern, this article reviews the retraction status of this author’s published articles to determine whether sufficient action has been taken to retract his body of work. Results show that retraction practices are not uniform and that guidelines for retraction are still not being fully implemented, resulting in retractions of insufficient quantity and quality. As retractions continue to emerge for the author’s publications, with ten more since 2011, and as they are generally increasing, these data on retractions not only provide findings of misconduct, but also allow us to make inferences about ongoing weaknesses in the system of scientific literature.     

Impulsivity as a Risk Factor for HIV Transmission in Men Who Have Sex with Men: A Delay Discounting Approach

Delay discounting (DD) is a measure of impulsivity that describes the subjective decline in value of a consequence as the delay to that consequence increases. We sought to assess whether the results of a monetary DD task would be predictive of sexual risk-taking in a group of Internet-using men who have sex with men (MSM). 1402 participants completed an online survey that included questions about the participant’s demographics, sexual history and behavior, drug use, sexual compulsivity, and a monetary DD task. High DD was associated with increased odds of reporting >2 UAI partners in the past 12 months [aOR = 1.5 (1.1–2.1)]. Future studies should examine the utility of DD as a predictor of risky sexual behavior, as well as explore the possibility of HIV prevention interventions targeting DD.     

基于顾客策略性购买和退货行为的缺货保障策略价值研究

针对产品缺货,本文基于顾客策略性行为在存在顾客无理由退货的条件下对两类缺货保障策略(即公开库存策略和缺货补偿策略)的价值进行了深入研究.本文分别建立了不提供任何缺货保障策略、公开库存保障策略和缺货补偿保障策略的理性预期均衡模型,通过对模型进行最优化分析发现产品缺货对最优无理由退货价格没有影响;顾客策略购买行为会破坏公开库存策略对销量的积极作用,但这种破坏作用可以通过提供慷慨的无理由退货服务来弥补,并且公开真实库存策略的价值优于公开虚假库存;当缺货补偿效用高于补偿成本时(称为有效的缺货补偿),缺货补偿策略的价值优于公开库存策略.最后,本文用Matlab软件对上述模型进行算例分析,验证了文中理论模型的正确性.     

论贝克特《哑剧》中的荒诞元素简

塞缪尔？贝克特作为荒诞派戏剧的典型代表之一，写出了《等待戈多》《终局》等许多脍炙人口的戏剧作品。《哑剧1》和《哑剧2》作为《终局》的后续，分别以双人哑剧与单人哑剧的形式形象表达了外部世界对人类的影响和人类内心世界的虚无与绝望。本文旨在结合荒诞剧的特点对《哑剧》在场景道具、语言、人物、主题四方面进行分析，从而得出贝克特戏剧创作的新特点。     

Edge Estimation in the Population of a Binary Tree Using Node-Sampling

Suppose a finite population of several vertices, each connected to single or multiple edges. This constitutes a structure of graphical population of vertices and edges. As a special case, the graphical population like a binary tree having only two child vertices associated to parent vertex is taken into consideration. The entire binary tree is divided into two sub-graphs such as a group of left-nodes and a group of right-nodes. This paper takes into account a mixture of graph structured and population sampling theory together and presents a methodology for mean-edge-length estimation of left sub-graph using right edge sub-graph as an auxiliary source of information. A node-sampling procedure is developed for this purpose and a class of estimators is proposed containing several good estimators. Mathematical conditions for minimum bias and optimum mean squared error of the class are derived and theoretical results are numerically supported with a test of 99% confidence intervals. It is shown that suggested class has a sub-class of optimum estimators, and sample-based estimates are closer to the true value of the population parameter.     

对孟子“夭寿不贰”句之解读--以海德格尔《存在与时间》中的生存论思想为参照

孟子云“夭寿不贰，修身以俟之，所以立命也”，其中包含着“夭寿（生死）与命之间的关系”以及“修身立命”这两方面的问题。海德格尔《存在与时间》在时间的视域下，将此在解读为“向死而在”，与言说“生生之大德”的儒者形成一种互补关系。命定的偶然性（个体的人必然有具体的实质限定）、必死性（有限个体必有其死）和使命义（人禀受善性而有道德使命）这三者构成了《孟子》中的“命”义。孟子反求诸己，追求人的本然善性和生之尊严；海德格尔则认为面对死亡的决断，是个体成为本真存在的关键，而儒者的生活方式可视作本真存在的一种可能性。