利用大数据分析技术的智能化网络故障诊断系统

随着网络技术的快速发展以及各种新网络业务的出现,网络的规模日益扩大和复杂。同时,各种网络服务对于网络可靠性的要求也逐渐提高,这就对网络的维护提出了更高的要求。在这种情况下,传统的网络维护模式逐渐不能适应现代网络发展的需求。针对现代大型网络的故障诊断问题,利用大数据分析技术,设计并完成了一套整体的智能化故障诊断系统。在此系统中,针对不同的故障类型,利用能够获取到的数据类型,针对性地设计了相关的故障诊断模块和算法。系统整体基于开源的数据处理平台构建,具备良好的可扩展性。通过实际案例数据的验证,结果表明此系统具备良好的处理实际网络故障的能力,将大数据分析技术应用于网络故障诊断领域也具备较强的可行性。     

Can commodity futures risk factors predict economic growth?

This paper examines whether commodity futures risk factors can predict future economic growth. We test risk factors capturing various spot or term premia and find that only three factors capturing term premia on the basis-momentum, basis, and change in slope are robust predictors for future economic growth, especially for long horizons. Our findings highlight the importance of the term premia, rather than the spot premia on which the literature has mainly focused. Moreover, we find that possible explanations for predictability of commodity factors—the intertemporal asset pricing model and information diffusion explanation—are all inconsistent with our empirical results.     

贸易信用、经济政策不确定性与企业破产风险

文章主要考察了经济政策不确定性加大的背景下,贸易信用在企业破产风险传播和防范中的作用。研究发现,贸易信用在资产端具有显著的风险引致效应,在负债端具有显著的风险化解效应,当经济政策不确定性上升时,企业通过主动调整贸易信用融出和贸易信用净额冲抵了部分不利影响。分类研究表明,贸易信用融出显著提高了外部融资依赖低企业的破产风险,贸易信用融入显著降低了外部融资依赖高企业的破产风险,经济政策不确定性则在一定程度上弱化了这些作用。贸易信用融出和贸易信用净额均显著提高了ST类企业的破产风险,同时经济政策不确定性显著强化了这一作用,这显著区别于非ST类企业。内生性检验及多种稳健性检验均显示研究结论是稳健的。     

电子商务环境下以订单流为主线的采购系统设计

系统以订单流为主线,分析了采购系统的需求和数据流程,融数据统计分析及电子商务为一体,其开发主要包括后台数据库的建立和维护,以及前端应用程序的开发及网上电子商务平台的构建。     

Comment on “A new simple square root option pricing model”

Câmara A. and Wang Y.‐H. ( 2010 ) introduce a simple square root option pricing model where the square root of the stock price is governed by a normal distribution. They show that their three‐parameter option pricing model can outperform the Black–Scholes option pricing model. We demonstrate that their assumption possesses an internal inconsistency in that the square root of the stock price can take on negative values. We generalize and revise their assumption so that the internal inconsistency can be avoided, and introduce a new square root option pricing model. The difference in option prices calculated from the two models may not be trivial. © 2011 Wiley Periodicals, Inc. Jrl Fut Mark     

机器人可以缓解老龄化带来的中国劳动力短缺问题吗

本文基于机器人替代能力的视角,分别从理论和实证角度探讨机器人能否缓解中国人口老龄化带来的劳动力短缺问题.本文提出衡量机器人替代能力的估计方法,使用2000-2015年58个国家的相关数据,将机器人对劳动力的替代能力进行了估计.估计结果表明,目前一台机器人平均每年大约可以替代60000～83000个小时的劳动工作量,工具变量模型和稳健性检验结果也进一步证明了这一结论.最后,通过使用技术创新扩散模型对机器人密度进行预测,结合本文估计出的机器人替代能力,解答了未来中国的机器人能在多大程度上缓解劳动力供给不足压力的问题.实证结果表明,机器人能够弥补的劳动力工作可以部分抵消由人口老龄化带来的劳动力短缺问题,这对更全面地理解中国人口老龄化问题及相关政策调整有十分重要的意义.     

International Power and China's Shipping Pattern

Three years ago,we watched a blockbuster:2012 - 20 and a half,an entangling symbol! Nobody knows whether the globe will be broken into two.However,the world economy is to restructure and the shipping market will undoubtedly collapse.Confronting such a great transformation,some say the winter is coming,feeling a chill,while some others are discussing W shape and L shape,predicting an impact wave.No matter it is a chill or an impact wave,great power is anyway contained,which is forming an international power,overthrowing outmoded systems and mechanisms and ushering in the advent of a fresh era master.     

Building Trust Between Consumers and Corporations: The Role of Consumer Perceptions of Transparency and Social Responsibility

Developing trust in a company is a significant part of building the company-consumer relationship. Previous studies have sought to identify the positive consequences of trust such as loyalty and repurchase, but the question of what builds trust remains largely unanswered. To answer the question, we developed a model that depicts the relationships among transparency, social responsibility, trust, attitude, word-of-mouth (WOM) intention, and purchase intention. An online survey was conducted with a US nationwide sample of 303 consumers, and the data were analyzed using the structural equation modeling method. The results indicated that consumers’ perceptions of a corporation’s efforts to be transparent in the production and labor conditions and to be socially responsible by giving back to the local community directly affected these consumers’ trust and attitudes toward the corporation, and indirectly affected their intentions to purchase from and spread positive WOM about the corporation. Theoretical and practical implications are discussed.