An Application of Covariance Analysis to Capacity Expansion at an Intermodal Blending Plant

Analysis of covariance (ANCOVA) integrates analysis of variance (ANOVA) and regression. The basic advantages of ANCOVA over ANOVA are: (1) generally greater power, and (2) reduction in bias caused by differences between groups that exist before experimental treatments are administered. ANCOVA has numerous possible applications in the evaluation of simulation output, especially where the values of covariates are not known until after the simulation experiment is completed. These covariates are uncontrolled experimental variables that influence the response but are themselves unaffected by the experimental factors. This paper provides an application of multiple analysis of covariance (MANCOVA) to a simulation experiment to determine whether an intermodal transfer and blending facility should add commodity handling and storage capacity. A discrete simulation model of the plant generated cash flows from several proposed capital projects. These cash flows indicated that capacity expansion was a prudent decision. However, when the treatment means for the various combinations of additional capacity were adjusted by MANCOVA for the same levels of operating volume and scheduling performance, the adjusted cash flows produced unacceptable financial returns. In this example, the increased precision of the MANCOVA model suggested that plant management should not invest in additional storage and commodity handling capacity.     

基于广告位分配的网购平台对在线卖方质量诚信激励研究

本研究考虑了包括两个相互竞争的在线卖方和一个网购平台构成的网购供应链，假定在线买方对商品的需求受价格水平、质量诚信和广告宣传的影响，网购平台为两个在线卖方提供商品宣传的总广告位资源固定。基于上述假设，首先建立了三方博弈模型：网购平台为先行动者，两个在线卖方为后行动者，网购平台与在线卖方进行动态博弈，两个在线卖方进行静态博弈。然后通过模型分析得出：对于网购平台来说，最优的广告资源配置机制应使得广告位分配之比与在线卖方的需求增加效应之比正相关；在此前提下，该广告位分配机制有利于激励两个在线卖方增加各自的质量诚信投入；在广告位资源的总数固定的假设下，无论在线卖方是否预测到两者的竞争并不能提高各自广告位的分配比例，也无论网络广告的宣传效果有多大，该广告位分配机制均能激励两个在线卖方增加质量诚信投入。最后在数值仿真的基础上，以淘宝网购平台上的3C商品与化妆品的相关交易信息进行了实证分析，分析结果支持了博弈模型的分析结论。     

Equity Crowdfunding: The Influence of Perceived Innovativeness on Campaign Success

This paper examines the impact of perceived innovativeness on the success of equity crowdfunding campaigns. Building on the investor perspective, we hypothesize a positive impact of perceived innovativeness on the campaign outcome. Our database covers 191 campaigns launched in France on different platforms, drawing on over 2,000 individual assessments of the perceived innovativeness of the start-ups involved, carried out by 176 participants with diverse backgrounds. We find support for our hypothesis from the investor perspective in that highly innovative projects attract more crowd investors and, in turn, raise more capital. We contribute to the understanding of how the crowd makes investment choices.     

从假洋鬼子到旗袍:中国近现代租界与被殖民文化的主体性

不同于赛义德后殖民理论突显西方殖民文化的话语霸权，普拉特“接触区”理论和霍米·巴巴“居间”空间理论都强调了被殖民文化的主体性与创造性。中国近现代租界就是中西方文化相互交流的“接触区”或“居间”空间。异质文化冲突有不同应对方式，暴力冲突是历史上常见的但并非唯一应对方式。假洋鬼子和旗袍作为租界新型混合性文化的产物，因其双重文化身份成为联结本土文化和西方文化的纽带，为中国本土文化社群所利用，以此强调自身的主体性和能动性。通过这种方式，中国本土文化社群将对西方文化的消极文化接受转换为对本土文化的积极文化输出，保持了自身的地位，从而在中西文化之间取得了微妙的平衡，其实质是非暴力的文化抵抗和温和的文化合作。这是中国文化在不平等跨文化交流实践中形成的应对策略，对于拓展后殖民理论和推动新世纪中国文化的健康发展，对于其他非西方后发展国家的文化建设提供“中国方案”，均具有某种范式意义。     

考虑成员风险规避的双渠道绿色供应链定价与绿色投入决策研究

本研究聚焦供应链成员风险偏好对双渠道绿色供应链的影响，在构建以供应商为主导的双层供应链模型基础上，研究成员间风险规避系数对产品绿色度、线上以及线下销售价格的影响。研究表明供应商的风险规避行为显著影响供应链绿色水平，导致产品绿色度、线上价格、线下价格降低，但零售商的风险规避行为会导致产品绿色度、线上价格升高，同时线下价格受到消费者绿色偏好的影响，当消费者绿色偏好水平较低时，零售商风险规避行为导致线下价格降低，而当消费者绿色偏好水平较高时，零售商风险规避行为导致线下价格升高；在供应商风险中性，零售商风险规避时，产品的绿色度最高，在供应商风险规避，零售商风险中性者时，产品绿色度最低。     

Smaller universal targets for homomorphisms of edge-colored graphs

Journal of Combinatorial Optimization - For a graph G, the density of G, denoted D(G), is the maximum ratio of the number of edges to the number of vertices ranging over all subgraphs of G. For a...