从新冠疫情看应急物流运作

以新冠疫情期间应急物流运作为对象,阐述了应急物流的特点,提出了应急物流运作的基本原则和方法,对我国应急物流的发展提出了一些建议,包括:统一归口管理,分级响应;构建统一的信息平台;建立应急物流体系;完善战略储备制度等,以期为我国应急物流的高效运作提供参考。     

建筑工程中钢筋保护层的控制措施

笔者试从钢筋与混凝土共同作用的受力机理,结合多年的工程施工实践,谈谈钢筋保护层的重要性及其在施工中的控制。     

Managing the Trade‐off between Ambiguity and Volatility in New Product Development

Uncertainty is widely recognized to be a key contingency influencing optimal new product development processes. However, extant new product research treats uncertainty in a largely unidimensional manner. Even in studies where multiple dimensions of uncertainty are measured, they are hypothesized to behave in a similar manner. This paper advances a theory describing how ambiguity and volatility place different and conflicting demands on new product development processes. Drawing on ideas from the organization theory and learning literatures, the theory suggests that more ambiguous environments favor slower development processes based on larger samples of data and interpretations whereas more volatile environments favor faster and more flexible development processes. Five hypotheses are advanced suggesting that as the level of ambiguity increases (decreases) relative to the level of volatility, firms should respond by decreasing (increasing) the role of top management in new product development, increasing (decreasing) front‐end and back‐end participation, allocating more (less) time and effort to ideation, and using more (less) aggressive screening processes. Some of these hypotheses are highly intuitive (participation and screening) while others are counterintuitive (top management involvement and screening aggressiveness). The theory is tested using primary data on the development of 120 new products and their subsequent performance collected from firms in U.S. manufacturing industries. The data largely confirm the hypotheses and provide strong evidence of a trade‐off between ambiguity and volatility that can be managed to improve new product performance. The exception is back‐end participation, which should be lower in relatively more ambiguous environments, in contrast to the hypothesis. A comparison with three alternative models shows that ambiguity generally has a larger impact on appropriate new product development processes and success than either the level of volatility or the overall level of environmental uncertainty. A detailed examination of the estimated relationships shows that for ideation and screening, the relative level of ambiguity and volatility determines optimal new product development processes, whereas for top management involvement and participation, processes can be designed based primarily on the level of ambiguity alone, with less concern over the degree of volatility. The study highlights the importance of considering the composition of uncertainty in addition to its overall level in contingent approaches to new product development. Real‐world examples of highly ambiguous and highly volatile new product development contexts are discussed.     

标准化对我国汽车产品出口竞争力影响的实证分析

标准是新一轮国际贸易竞争的核心,文章选取了每年颁布的汽车标准数量和汽车产品竞争力RCA值分别作为标准化和汽车产品出口国际竞争力的评价指标。以我国汽车产业1988~2010年的数据为基础,利用协整检验、Granger因果关系检验对标准化与我国汽车产品出口竞争力的关系进行了实证分析。结果表明:标准化、利用外资、研发投入与汽车产品出口竞争力之间存在着长期均衡关系,标准化有助于我国汽车产品出口竞争力的提升。在实证的基础上,从国际汽车标准制定及其推广、我国汽车企业创新能力、新能源汽车标准制定等方面提出了相应的对策。     

聚酯网织造伺服卷取/送经控制系统研究

介绍了聚酯网织造伺服卷取/送经工艺,进行了聚酯网织造伺服卷取/送经机构设计。分析了伺服卷取/送经控制控制策略,整个系统有两个闭环控制:分别是伺服卷取闭环控制和伺服送经闭环控制。设计了以PLC为控制核心的控制系统,分为界面层、控制层和执行层,完成了模块化的软件系统设计。     

我国矿业中介组织服务体系的构成与存在问题研究

矿业中介组织不仅在矿产资源的勘查、开发、交易、并购、融资等活动中发挥着重要作用,而且对促进政府职能转变、推进事业单位改革和提高市场配置资源效率也起着关键的作用。我国是矿业生产和消费大国,但矿业中介组织服务体系还存在管理混乱、运行不规范、诚信度不高等现象,文章通过剖析整条矿业产业链中各阶段中介组织所应发挥的作用和存在问题,对存在问题的内部和外部原因进行了剖析,并针对我国矿业中介服务体系的构建和发展提出了建议。     

高校服务型党组织建设的思考

围绕服务加强高校党组织建设是当前高校党建的重要任务。高校服务型党组织建设需要解决的基本问题有三个,即高校服务型党组织“建什么”“怎么建”及“如何评价”,理清这些问题是做好高校服务型党组织建设的实践基础。     

防范中小纺纱企业税务风险

中小纺纱企业依法纳税意识淡薄,在农产品购销时利用增值税链条衔接不够严密的缺陷偷逃税款,从企业和税收管理两方面分析后建议:加强日常税收征管,严格收购发票管理,建立科学的行业数学模型,明确纳税评估工作思路,全面落实税收管理员制度,加大对税收违法行为的打击力度.     

小型冲压模具报价理论初步研究及模型建立

综合了估价法和对比法两种模具报价方法，针对小型冲压模提出了估算和精确计算相结合的报价思路，建立了相应的数学模型。对数学模型估算部分中的基本参数用最小二乘法进行修正，提高了估算精度，并提供了可用于程序设计的数学模型中的拟合曲线解法。     

中国传统图形中的意象美及在现代艺术中的传承

信息时代的当今世界,各种文化相互影响、日益融合,传统文化和现代文化的碰撞和互融,使人们对现实有了更清醒的认识。中国传统美学博大精深,“意象”美贯穿了中国传统美学的始终,对中国传统图形的影响更是明显。在对中国传统图形中的“意象”美及其在现代标志设计中的传承作一探讨。