多孔结构建筑材料力学性能的有限元分析

多孔材料是一种新兴的材料,制备较易,成本较低。相对于一般连续介质材料而言,多孔材料具有比强度高、比表面积高、相对密度低、重量轻、隔音、隔热等优点。它最大的特点是具有排列规则、大小可调的孔道结构,在建筑材料中也有很多的应用。因此,对非均匀孔洞与均匀孔洞建筑材料力学性能的研究是很重要的课题。论文通过建立非均匀孔洞和均匀孔洞的有限元模型,对比分析两种模型的受力性能,更好地进行多孔建筑材料的推广和使用。     

SNAP and Paycheck Cycles

It is well documented that individuals do not spend the Supplemental Nutrition Assistance Program (SNAP) benefits smoothly over the month after receipt. Rather, recipients spend a disproportionate share of benefits at the beginning of the benefit month. This has costs for recipients and stores. There is also evidence that other income streams, such as Social Security and paychecks, are not spent smoothly. The presence of these other income streams may bias estimates of the effects of this SNAP cycle on consumption for working SNAP beneficiaries and those who receive other government benefits. We use data from United States Department of Agriculture's National Household Food Acquisition and Purchase Survey to explore how the SNAP cycle is affected by accounting for these other income streams. We find suggestive evidence that the cycle is more pronounced for workers who are paid on a weekly or monthly basis, but little evidence that cycles in other income streams mitigate or exacerbate the SNAP cycle.     

变压器绕组温升试验及其不确定度分析

本文介绍了变压器正常加载时的温升试验过程和相关事项，并对试验数据进行变压器温升的不确定度分析。     

吉林省农村电子商务平台建设研究

自2014年起,国家相继出台多项政策支持农村电子商务平台建设.电子商务平台的建设将有效改善农产品买卖双方信息不对称的问题,提升农产品流通效率,降低农民的交易成本,为农民提供更多的就业机会.吉林省是农业大省,农村电子商务发展对吉林省农村建设至关重要.借鉴先进省份的先进经验,对农产品的生产过程、加工过程、流通环节设定标准,加强电商专业人才的引入与培养,改善其基础设施建设落后、配套服务差、组织化低、农产品标准化程度低、品牌意识差等问题,对实现农产品的标准化、品牌化建设以及吉林省农村电子商务平台建设具有重要意义.     

Efficiency of New Zealand’s District Health Boards at Providing Hospital Services: A stochastic frontier analysis

Journal of Productivity Analysis - The majority of secondary and tertiary healthcare services in New Zealand are provided through public hospitals managed by 20 local District Health Boards. Due to...     

虚拟品牌社区顾客体验会带来其价值共创行为吗--基于手机虚拟品牌社区的实证研究

本文以顾客体验为切入点,基于价值共创理论、心理所有权理论和互惠规范理论,并运用于S-O-R理论框架,构建了虚拟品牌社区下,顾客参与价值共创行为产生的影响路径模型,通过问卷调查与实证分析得出:第一,顾客信息体验和娱乐体验越强,其参与价值共创的意愿程度越高,心理所有权部分中介了二者的促进关系;互动体验强化了社区顾客的心理所有权,并经由心理所有权的完全中介提高其参与共创意愿。第二,顾客参与共创意愿程度越高,其价值共创行为就越容易出现,社区的互惠规范正向调节了二者的关系。     

金融压力、所有制结构与银行风险承担——基于中国影子银行活动的实证研究*

2008年金融危机之后，监测与防范系统性金融风险、维护金融稳定成为各国监管机构的工作重点。本文构建了一个反映我国系统性金融风险的中国金融压力指数（FSIC）。基于此，本文研究不同所有制结构的商业银行将如何调整影子银行业务以应对系统性金融风险。实证结果表明，当金融压力上升时，相较于国有银行，非国有银行的风险承担水平显著上升。进一步研究发现，这一差异与两类银行对影子银行这一风险业务的调整有关。当金融压力上升时，国有银行会显著减少影子银行业务，而非国有银行的影子银行业务不会减少。本文提出了国有银行的双重职能这一观点来解释实证研究的发现。本文的研究结论对于指导我国金融市场化改革和防范系统性金融风险具有重要启示。     

央行货币政策报告文本信息、宏观经济与股票市场

本文利用金融情感词典和文本分析技术,分析中国人民银行货币政策执行报告的文本情绪、文本相似度和文本可读性等多维文本信息,刻画央行货币政策执行报告的文本特征,探究货币政策报告的文本信息与宏观经济和股票市场的关系。实证研究发现,货币政策报告的文本情绪的改善会引起显著为正的股票市场价格反应,报告文本相似度的增加会引起股票市场波动性的显著降低,报告可读性对公布后股票市场的波动性影响不显著。货币政策报告文本情绪还与诸多宏观经济指标显著相关。进一步研究发现,引起股票市场显著反应的是报告文本情绪中反映货币政策指引的部分,而反映宏观经济历史状态的部分对股票市场的影响不显著。本文从文本大数据分析角度证明了我国央行沟通的有效性,对国内央行沟通相关研究形成了有益补充。     

The impact of earnings pressure on exploratory innovation

While earnings expectation has been shown to determine a firm’s investment decisions, the knowledge about how such expectation influences a firm’s investment horizon for innovation is still blurred. This study therefore addresses this research issue by examining the relationship between earnings pressure and exploratory innovation while investigating the moderating effects of cross‐rival effect and resource availability. By examining high‐tech industrial firms in S&P 1500 from 2000 to 2012, the results indicate that stock analysts, as information intermediaries between innovation firms and the capital market, impose pressure through earnings forecasts on firms’ exploratory innovation. Our findings also reveal that the earnings pressure‐exploratory innovation relationship can be mitigated when its competitors encounter a higher level of earnings pressure. However, a firm’s financial slack shows less significant association to moderate the earnings pressure‐exploratory innovation relationship. Possible explanations for the results in regard to their theoretical and practical implications are discussed in this study.