基于物联网架构的纺织品仓库温湿度监控系统设计

仓储是纺织品流通的重要组成部分,纺织产品由于其自身的诸多特性,对于温湿度等仓储环境有着特定的要求。应用物联网技术,对纺织企业仓储温湿度监控系统的框架和功能进行了分析,有利于加强纺织品的仓储物流管理,从而提升纺织企业效益。     

银行体制市场化、营运资本与企业绩效

在一个自然实验的框架下,本文考察了银行体制市场化以后,企业营运资本使用变化对企业绩效的影响。本文发现,银行体制市场化使得银行部门信贷资源配置具有市场化特征,对所有企业的外源融资都进行约束。受到外源融资约束的企业会更多使用企业的内部资金进行经营和生产活动,一方面,企业会更多使用营运资本提高企业的生产和财务绩效,而另一方面,企业会减少营运资本来维持生产规模的扩张。这些结果表明,银行体制市场化能够有效提高企业内部资金使用效率,在当前工业部门普遍面临融资难的困境下,对进一步探讨银行体制改革和提高企业绩效有重要意义。     

Close relationship with the supervisor may impede employee creativity by suppressing vertical task conflict

Leader‐member exchange as a form of supportive leadership is expected to foster employee creativity. However, empirical evidence suggested this relationship is complex. This study attempts to address this complexity by proposing and testing a curvilinear mechanism, which attenuates the overall positive effect of LMX on creativity by transmitting a curvilinear indirect effect via vertical task conflict. Results drawn from a sample of 276 supervisor–subordinate dyads provided support for the hypothesized curvilinear indirect effect. Specifically, LMX was found to negatively influence employee creativity by suppressing vertical task conflict for subordinates in high‐quality LMX relationships, while the indirect effect was not significant for subordinates in low‐quality LMX relationships.     

The Effect of Fuel Price Changes on Fleet Demand for New Vehicle Fuel Economy

New vehicle purchases by private companies and government agencies, or ‘fleet’ buyers, represent a significant percentage of overall new vehicle sales in the United States. Yet little is known about fleet demand for new vehicle fuel economy including how it responds to fuel price changes. Using unique disaggregated data on fleet and household registrations of new vehicles from 2009 to 2016, we estimate how fleet demand for new vehicle fuel economy responds to fuel price changes. We find that fleet purchases of low fuel economy vehicles fall relative to high fuel economy vehicles when gasoline prices increase, a finding that is consistent with fleet buyers’ taking into account capitalization of fuel costs in the second‐hand market. Our estimates imply that raising gasoline prices by one dollar would increase fuel economy of new vehicles acquired by fleet buyers by 0.33 miles per gallon. We estimate a similar response for household buyers during the same period. This result justifies basing fuel economy responses to fuel cost changes on household data alone, an assumption widely used in the vehicle demand literature and the fuel economy valuation literature. We also find, however, that the response to fuel price changes varies across the types of fleet buyers: rental companies respond strongly to fuel price changes, whereas commercial and government buyers are insensitive. Our estimates imply that an increase in the federal gasoline tax would modestly increase fuel economy of vehicles bought by households and rental companies but would have little to no impact on fuel economy of vehicles bought by non‐rental companies and governments.     

A design-led conceptual framework for developing school integrated STEM programs: the Australian context

International Journal of Technology and Design Education - Integrated Science, Technology, Engineering, and Mathematics (STEM) education is recognised as the latest development stage on the pathway...     

老龄化趋势下老年群体的消费需求变化与产业发展对策研究

随着我国人口老龄化程度的不断加深,在经济内循环的政策驱动下,老龄人口消费需求将对我国产业发展产生深远的影响.目前,老龄人口消费需求强劲,但与之相关的医护、旅游、娱乐、地产、金融和教育等产业的发展相对滞后.政府应协同社会力量突破老年产业发展的瓶颈,扩大我国老年人的消费需求,带动国内经济发展.     

典型场景下换电重卡的技术经济性分析

换电重卡能够解决新能源重卡购置成本高、充电时间长等痛点,对于加快我国货车电动化进程具有重要意义。但是,受制于车辆换电成本高、续驶里程短等因素,换电重卡的推广应用需具备合适的应用场景和一定的政策支持。为研究换电重卡的适用场景与应用范围,本文构建了多个典型场景下换电重卡的技术经济性模型,分析了影响换电重卡使用阶段经济性的主要因素。结果表明,对换电重卡经济性影响最大的因素是电池综合服务费;在中长途运输场景下,载货量对换电重卡经济性的影响同样明显;碳交易制度对换电重卡的经济性影响则较为有限。为推动换电重卡的发展,政策层面应给予换电重卡更多支持,降低换电重卡购置成本与运营成本,同时给予换电重卡更多政策便利条件,促进换电重卡的推广应用。     

近期国际石油价格回顾与预测

8月份,美国经济数据好转提振了人们对世界经济恢复前景的信心,加上国际能源机构（IEA）上调全球石油需求预估,以及美元下跌等因素的影响,国际原油价格走势较为强劲,大部分时间维持在70-75美元／桶波动。美国西得克萨斯轻质原油（WTI）、英国布伦特原油和亚洲迪拜原油的现货平均价格分别为71．05、72．83和71．34美元／桶,较7月份分别上升了6．95、8．22和6．52美元／桶。     

山东地区城市天然需求负荷与气温关系研究

作为清洁能源的天然气,近年来在山东的销售量持续增长.天然气的负荷需求主要受地区气象条件、工业企业生产情况、居民生活习惯、价格水平、节假日等多种因素的影响,其中气温是造成城市天然气短期负荷波动的主要原因之一.本文研究山东省天然气市场需求量与气温之间的关系,对天然气日均负荷进行周期分析,找出天然气日均负荷变化与日均气温之间的相关关系,为天然气公司进行地区性天然气计划平衡决策提供基础信息参考.     

如何规范项目工程质量监督档案管理工作

按《石油天然气建设工程质量监督工作程序》,分析了不同监督阶段应形成的档案资料内容及要求;结合西气东输冀宁管道工程质量监督档案整理工作实践,提出了完善石油专业监督档案规定、注重监督工作质量、完善审核制度、通过培训增强监督档案工作质量意识等建议。