烟梗投料麻绳剔除装置的设计与应用

针对目前新疆卷烟厂制丝车间梗线生产HT梗时,采用麻袋封装,在梗条的运输过程中麻袋破损,导致梗条中混有麻绳,目前采用人工分拣,劳动强度大的问题,本文设计了一种烟梗中麻绳麻丝杂物装置,该装置由行星辊,耙钉,粘条,传动轴,行星辊,升降丝杠,机架等组成.装置制作完成后为了验证该装置的加装后的麻绳剔除效果,同时找到满足工艺要求条件下的最佳剔除效果,进行电机转速,工作时间和物料重量三因素三水平的正交试验.试验结果表明,该装置剔除效果最佳时的工作状态组合为:电机转速n为72r/min,工作时间t为2h,物料重量m为6000kg,继续优化验证试验,试验值与理论值相差小于5％,最佳结果满足烟梗中麻绳剔除分拣要求.     

博士毕业生就业选择研究:综述与展望

就业作为博士教育运行机制的终端,是对博士生培养质量的重要检验.已有博士毕业生就业选择研究主要围绕整体就业率、就业选择趋向、就业选择差异性等方面展开,达成了一些共识,为了解博士毕业生就业选择提供了有效途径.但相关研究在数据来源以及研究内容上普遍存在年限单一、院校单一或分析维度单一等问题,未来研究需采用多年限、多院校、多维度分析的方式对博士毕业生就业选择进行更加准确、深入、全面的呈现.     

客户协同创新维度及构成实证研究

客户协同创新是开放网络环境下企业创新能力提升的重要途径。基于协同理论、关系嵌入理论及客户参与创新等理论基础，对客户协同创新要素进行理论分析。采用探索性案例分析法，归纳客户协同创新要素特征，包括由互惠利益、关系质量和持续意愿构成的协同关系嵌入，由程序化协调、人际关系协调构成的协调协作机制，以及由信息资源分享、协同任务分担构成的协同资源投入。以案例研究结论为基础，进行量表开发，选择知识密集型服务业为实证对象，验证客户协同创新维度构成，可为客户协同创新机理研究与应用实践提供理论基础。     

第三方支付机构的小企业融资业务发展浅析

借助第三方支付机构在银行和小企业之间的桥梁作用,可为小企业提供融资便利.本文对现有的融资模式进行了探讨,分析其积极作用和不足之处,在此基础上,对第三方支付机构以及监管部门在如何发展和保障小企业的融资业务方面提出了意见和建议.     

阿联酋粮食战略储备项目的先进性和创新性

阿联酋粮食战略储备项目，筒仓仓容276760 t，粮食品种为小麦和稻谷，项目建设点储粮环境恶劣，图纸审查严格，整个项目设计均采用最先进的技术，并严格遵循欧美规范和标准进行设计。     

CLOSED FORM PRICING FORMULAS FOR DISCRETELY SAMPLED GENERALIZED VARIANCE SWAPS

Most of the existing pricing models of variance derivative products assume continuous sampling of the realized variance processes, though actual contractual specifications compute the realized variance based on sampling at discrete times. We present a general analytic approach for pricing discretely sampled generalized variance swaps under the stochastic volatility models with simultaneous jumps in the asset price and variance processes. The resulting pricing formula of the gamma swap is in closed form while those of the corridor variance swaps and conditional variance swaps take the form of one‐dimensional Fourier integrals. We also verify through analytic calculations the convergence of the asymptotic limit of the pricing formulas of the discretely sampled generalized variance swaps under vanishing sampling interval to the analytic pricing formulas of the continuously sampled counterparts. The proposed methodology can be applied to any affine model and other higher moments swaps as well. We examine the exposure to convexity (volatility of variance) and skew (correlation between the equity returns and variance process) of these discretely sampled generalized variance swaps. We explore the impact on the fair strike prices of these exotic variance swaps with respect to different sets of parameter values, like varying sampling frequencies, jump intensity, and width of the monitoring corridor.     

基于多维技术创新地图维法耦合的技术创新路径构建及实例分析

基于现有创新理论并结合当代技术发展特征,创建了多维技术创新地图,构建了基于多维技术创新地图维法耦合的技术创新路径。结合煤层气开采卸压消突创新实例,验证了该方法的可行性和有效性,即提高了技术创新路径构建的客观性,从技术创新本质层面指导技术创新活动的开展,有助于为企业开展技术创新活动提供决策支持。     

Unemployment as an Adverse Trigger Event for Mortgage Default

The Journal of Real Estate Finance and Economics - There is limited evidence of the role of household-level adverse trigger events in driving mortgage default, and the evidence based on proxies,...     

REGIONAL ANTI‐CORRUPTION EFFORT,POLITICAL CONNECTIONS AND FIRM INNOVATION EFFORT: EVIDENCE FROM CHINA

This paper examines how firm characteristics and local anti‐corruption effort moderate the influence of political connections on enterprises’ private R&D investment using data from 2,587 Chinese A‐share listed enterprises. Our results show that the local anti‐corruption institutional environment significantly moderates the strong relationship between political connections and enterprises’ private R&D investment. Firm characteristics (i.e., firm size and firm age) also show a moderating effect on the relationship between political connection and enterprises’ private R&D investment; larger and older enterprises are more likely to have innovative resources and business cooperation partners, and thus are able to reduce their degree of reliance on political connections and government funding. The results of our study suggest the importance of having a transparent and fair institutional environment for enterprise innovation activities.     

全球电子商务：发展现状与趋势

随着技术的成熟,全球电子商务正在经历着强劲增长。通过对全球互联网覆盖现状和全球电子商务发展的研究,分析了全球电子商务发展的基本情况。并对新兴国家电子商务市场和部分典型国家的电商发展状况与趋势进行研究,以供广大读者借鉴。