从企业孵化器到企业加速器:缘起、演进及走向

企业加速器与企业孵化器同为服务企业发展、促进经济增长、增加就业岗位的创新服务组织,二者之间存有诸多类似之处,亦有许多的差异。这里以企业孵化器、企业加速器的起源、演进为切入点,剖析二者在概念界定、服务内容等方面的区别,进一步阐述"孵化—加速"耦合对接,构建一条完整创新服务供应链的理论价值和实践意义。     

区域国际贸易效应对人民币升值响应的非参数统计分析——以嘉兴市为例

以2004年7月到2008年8月个体区域的进出口的月度数据为样本,应用"Mann-Kendall"和"Mitcheel"非参数变点及趋势分析,实证考察了人民币汇率升值对嘉兴地区的进出口总额及不同经济组织进出口额产生的收益影响,探索了相关经济指标的变化规律和特征。评估结果表明,个体区域及不同类别经济组织进出口的效益受人民币汇率变化的影响有较大差异,并由此可以认为非参数变点及趋势统计方法能够给出一种定量经济科学依据并具有预报作用。     

Regulation of relationships between heterogeneous farmers and an aquifer accounting for lag effects

Many environmental problems are due to damage caused by pollutants that accumulate with a time lag following their emission. In this study, we focus on nitrates used in agriculture, which can pollute groundwater many years after their initial application. A dynamic optimal control problem with heterogeneous farmers is proposed. The usual structural parameters such as the discount rate, the natural clearing rate and the lagged time interval between the occurrence of soil‐level pollution and the impact on groundwater are taken into account. We also examine pollution as caused by a continuous set of farms characterised by their individual performance index and by their individual marginal contribution to the pollution. The issue is further investigated by taking account of change in the information context, successively related to perfect information and to asymmetric information. As a result, when the delay between the spreading of N‐fertilizer and the impact on the aquifer increases, that is, the longer the lag, the steady‐state pollution stock and the steady‐state shadow price of the stock both increase. Moreover, we show that the optimal regulation may require a decreasing amount of fertilizer over time, even in the case of initial underpollution.     

The M4 Competition: Results,findings, conclusion and way forward

The M4 competition is the continuation of three previous competitions started more than 45 years ago whose purpose was to learn how to improve forecasting accuracy, and how such learning can be applied to advance the theory and practice of forecasting. The purpose of M4 was to replicate the results of the previous ones and extend them into three directions: First significantly increase the number of series, second include Machine Learning (ML) forecasting methods, and third evaluate both point forecasts and prediction intervals. The five major findings of the M4 Competitions are: 1. Out Of the 17 most accurate methods, 12 were “combinations” of mostly statistical approaches. 2. The biggest surprise was a “hybrid” approach that utilized both statistical and ML features. This method’s average sMAPE was close to 10% more accurate than the combination benchmark used to compare the submitted methods. 3. The second most accurate method was a combination of seven statistical methods and one ML one, with the weights for the averaging being calculated by a ML algorithm that was trained to minimize the forecasting. 4. The two most accurate methods also achieved an amazing success in specifying the 95% prediction intervals correctly. 5. The six pure ML methods performed poorly, with none of them being more accurate than the combination benchmark and only one being more accurate than Naïve2. This paper presents some initial results of M4, its major findings and a logical conclusion. Finally, it outlines what the authors consider to be the way forward for the field of forecasting.     

煤炭行业的发展及其润滑油市场的开发

通过对国内煤炭行业基本状况、未来发展趋势和润滑油脂应用现状的分析,就如何运用现代营销手段与服务方式来开发维护煤炭行业这一巨大润滑油市场进行了讨论,认为润滑油行业应帮助煤炭行业建立完善的润滑管理体系,并与煤炭行业强技术领域合作,共同开发新产品及推进用油国产化。下游产品开发是煤炭行业今后重要的利润增长点,近期发展迅速,润滑油行业应密切关注其相关产业链设备的引进情况,及时提供所需润滑油品。     

我国边疆学的构筑刍议

随着边疆史地研究的不断发展,边疆学的概念开始为更多的人所熟知。边疆学的构筑是发展的必然趋势,同时也是建设中国特色社会主义的需要。我们要看清当前的局势,认真进行边疆学的研究,促进其健康、快速的发展,为我国边疆的安全、发展和国家的稳定统一打好理论基础,促进国家的发展和进步。     

趋势因子与股票横截面收益

本文采用2005年至2016年A股上市公司为研究样本,通过归一化的均线指标,构造了个股趋势因子。实证结果发现：该因子对股票横截面收益具有显著的解释能力,经过CAPM模型和Fama French三因子模型风险调整后依然存在显著的超额收益。     

论企业文化的本质及发展趋势

从认识企业文化的本质特征入手,走出企业文化建设的误区,正确把握全球经济一体化条件下企业文化的发展趋势,构建以人为本、协作竞争,注重多元文化条件下相互融合及不断创新的企业文化,是当代中国企业走向世界,提高国际竞争力的内在动力和长效机制.     

零售商自有品牌化趋势及对策研究

品牌是企业形象的象征,也是企业巨大的无形资产。目前国际零售商自有品牌在企业经营发展中担当着越来越重要的角色,并且已经成为赢得市场的利剑。我国零售业面对激烈的国际竞争,在自有品牌的开发与经营中不断尝试和探索。本文就零售商自有品牌化的发展趋势提出了发展自有品牌战略的对策,以供我国零售业发展自有品牌参考。     

新世纪的两大发展趋势—全球化与信息化

本文主要讨论21世纪的两大发展趋势－全球化与信息化。在全球化的分析中主要说明：出现迹象，发生原因及经济全球化呼唤全球政府，全球化的结果将是共产主义的胜利。在信息化的分析中说明了什么是信息化、信息化的内涵要素及信息化对经济和社会的影响。