AKL9401TDP低平板半挂车道路通过性分析

以AKL9401TDP低平板半挂车为研究对象,建立道路通过性的计算模型,并基于解析方法分析最小转弯直径和转弯通道宽度两个参数。研究结果表明,整车道路通过性能满足使用要求。     

Designing business models in circular economy: A systematic literature review and research agenda

The concept of circular economy is increasingly receiving attention in different domains, including strategic management, operations management, and technology management. It requires companies to design their business model (i.e., the value network, the relationships with the supply chain partners, and the value propositions towards customers) around a new concept of sustainable development that reduces consumption of natural resources and preserves the environment. However, extant research falls short in terms of explaining how companies design their business model according to the circular economy principles. Starting from this premise, the present paper provides a systematic review of the literature on the design of business models in the context of circular economy, aiming to offer an overview of the state of research and outline a promising research agenda.     

Determinants of consumer demand for circular economy products. A case for reuse and remanufacturing for sustainable development

We investigate determinants of consumer demand for circular (reused and remanufactured) products. Based on exploratory choice-based conjoint experiments with a sample of 800 adults in the United Kingdom, we examine two types of premium segment electronic appliances: a mobile phone and a robot vacuum cleaner. We find that consumers prefer partly circulated products over fully or not at all circulated products and that circular products can likely successfully enter the existing market at the retail price of a new product. Interestingly, circular products compete for market share primarily with new products, leaving the market share of second-hand options less affected. The results show a promising path for firms considering a transition to circular business models.     

Remanufacturing for the Circular Economy: An Examination of Consumer Switching Behavior

For the circular economy to be tenable, consumers need to not only return products after use, but also purchase products that are remanufactured. However, research finds that consumers have a poor opinion of remanufactured products and are typically not prepared to adopt them. Thus, development of the circular economy is dependent upon deeper understanding of consumers’ attitudes and behaviors. Research typically considers either micro‐level or macro‐level factors when assessing consumer perceptions of remanufactured products. The current research incorporates macro‐level factors of price, government incentives and environmental benefits with the moderating influence of micro‐level consumer attitudes to examine consumers’ intention to switch from purchasing new products to remanufactured products. The findings suggest that a consumer's attitude toward remanufactured products is an important moderating factor predicting consumer switching behavior to remanufactured products. Copyright © 2016 John Wiley & Sons, Ltd and ERP Environment     

油气管道环焊缝新型修复技术研究

为了寻求适应高钢级油气管道环焊缝缺陷的新型修复方法,克服传统修复技术的局限性,提出了电弧增材制造技术用于油气管道环焊缝修复的可行性。首先,对激光熔覆、冷喷涂、电弧增材制造3种新型修复技术进行对比分析后,采用电弧增材制造技术进行实验研究;其次,在X80管道环焊缝处沿轴线截取22 mm厚的试样,并在环焊缝处设计坡口角度为60°,坡口深度为11 mm的缺陷,采用电弧增材制造冷金属过渡工艺、ER50-6焊丝进行修复实验;最后,对修复试样进行力学实验测试,并对实验数据和断口形貌进行分析。实验结果表明,电弧增材制造修复后试件抗拉强度最高达639 MPa,强度与管体基材匹配。研究结果表明,电弧增材制造技术用于X80油气管道环焊缝缺陷的修复是可行的,具有沉积效率高、成本低、力学性能能满足修复要求的特点,对于高钢油气管道环焊缝缺陷修复的可行性和经济性具有重要的现实意义。     

循环经济产业链形成的价值规律和政府角色

首先给出了经济系统物质流动的价值增值定律,物流方向选择的价值梯度公理和确定物流最佳数量的价值最大化定理,以此作为循环经济系统正向物流和逆向物流规划的理论依据。然后分析了循环经济系统物质流动价值增值过程,定义了循环物流价值增值倍数,发现循环经济系统的物流价值增值倍数是循环经济的核心所在。接着在生产者责任延伸的框架下,探讨了企业循环经济系统的物质循环分配的利润最大化原理和社会循环经济系统物质等价交换原理。最后讨论了政府的行政、政策等职能对循环经济系统的逆向物流市场形成和有效运行的作用。文章的研究结论对于推进循环经济物流系统和循环经济产业价值链的建设有一定的理论指导意义。     

“十二五”时期转变经济发展方式、促进循环经济的关键政策研究

通过对我国十二五时期转变经济发展方式的宏观背景进行分析,得出循环经济仍然是我国转变经济发展方式的重要着力点的结论,剖析了循环经济的重要地位和作用,对循环经济的若干重要问题提出政策性建议。     

基于层次分析法的企业循环经济发展模式选择模型研究

首先以企业产权边界、企业间联系两个维度为依据,归纳了企业发展循环经济的五种模式。随后运用层次分析法,在充分考虑了循环经济本身特有的稀缺性、外部性、稳定性、收益性等经济学特性后,提出企业选择循环经济发展模式决策模型。最后通过模型计算分析,指出企业集团循环经济发展模式应该是未来企业推进循环经济理论研究和实践重点。     

制度变迁、集体行动与循环经济的发展——以循环经济的制度推进为视角

党的"十二五"规划提出要大力发展循环经济。作为全新的经济发展模式,循环经济的发展离不开制度的变迁和参与者之间的合作。制度的变迁离不开相对价格和偏好的改变。通过制度建设,形成有利于循环经济发展的相对价格格局和人们的偏好,并克服参与者合作时产生的集体困境,有助于推进循环经济的发展。     

16Mn无缝钢管的焊接工艺认可试验

拟定焊接工艺,对16Mn无缝钢管进行焊接工艺认可试验。试验结果均符合NK船级规范,说明采用此焊接工艺可保证16Mn无缝钢管的焊接质量。