共查询到18条相似文献，搜索用时 62 毫秒
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In the Industry 4.0 era, disruptive technologies such as big data analytics, blockchain, Internet-of-Things, and additive manufacturing have become major forces driving supply chain transformation. Under such circumstances, particular attention should be attached to balancing resilience and efficiency of the supply chain, especially in the presence of more turbulence. In this study, we first summarize the conflicts between supply chain efficiency and supply chain resilience regarding practices and objectives. Then, we discuss the positive effects of disruptive technologies in improving resilience and efficiency. Afterwards, we propose a research agenda that covers both the influence mechanism and trade-off mechanism of these technologies in terms of resilience and efficiency. 相似文献
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Oscar Rodríguez-Espíndola Soumyadeb Chowdhury Ahmad Beltagui Pavel Albores 《国际生产研究杂志》2020,58(15):4610-4630
The growing importance of humanitarian operations has created an imperative to overcome the complications currently recorded in the field. Challenges such as delays, congestion, poor communication and lack of accountability may represent opportunities to test the reported advantages of emergent disruptive technologies. Meanwhile, the literature on humanitarian supply chains looks at isolated applications of technology and lacks a framework for understanding challenges and solutions, a gap that this article aims to fill. Using a case study based on the flood of Tabasco of 2007 in Mexico, this research identifies solutions based on the use of emergent disruptive technologies. Furthermore, this article argues that the integration of different technologies is essential to deliver real benefits to the humanitarian supply chain. As a result, it proposes a framework to improve the flow of information, products and financial resources in humanitarian supply chains integrating three emergent disruptive technologies; Artificial Intelligence, Blockchain and 3D Printing. The analysis presented shows the potential of the framework to reduce congestion in the supply chain, enhance simultaneous collaboration of different stakeholders, decrease lead times, increase transparency, traceability and accountability of material and financial resources, and allow victims to get involved in the fulfilment of their own needs. 相似文献
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New technologies have the potential to severely “challenge” or “disrupt” not only our established social practices but our most fundamental concepts and distinctions like person versus object, nature versus artificial or being dead versus being alive. But does this disruption also change these concepts? Or does it merely change our operationalizations and applications of the same concepts? In this paper, I argue that instead of focusing on individual conceptual change, philosophers of socially disruptive technologies (SDTs) should think about conceptual change as a change in a network of interrelated concepts. What really generates a potential social disruption are changes of inferential relations between concepts – whether or not this entails a change of the respective individual concepts. Philosophers of socially disruptive technologies are therefore in the privileged position of being able to avoid commitments regarding the individuation of individual concepts. 相似文献
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H．26L的编码效率比已有的其他视频编码标准有很大的提高。在相同PSNR下与H．263和MPEG4相比,H．26L在低码率时的输出码率平均节省分别约为40％和36％,在高码率时的输出码率平均节省分别约为55％和45％。本文描述了H．26L的编码器结构框图,对各模块的作用和使用的技术进行了综述,并与其他视频标准中的主要技术进行了比较。对H．26L中几种技术在高、中和低码率下对编码效率的影响进行了实验研究并给出实验结果,这对于不同码率的视频应用时编码器的参数选择和模式选择有重要意义。 相似文献
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The paper presents investigations of different copper microchannel structure manufacturing technologies. Both additive and subtractive techniques are taken into consideration. Performed tests show that due to the chosen material and dimensions only wire cutting process and milling process can be selected. The use of these methods results in differences in obtained microchannel shape. Further, the analysis of microchannel shape, various geometrical and thermal parameters and their influence on cooling abilities of the microchannel structures are presented. It is shown that the geometry resulting from chosen manufacturing technology may impact the overall thermal performance of the copper microstructures, especially for heat transfer coefficients below 5 W/cm2 K. The numerical analysis has been conducted with the aid of ANSYS software. 相似文献
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《低温学》2017
In order to make direct performance comparisons of varying the vaneless space in high-speed micro turbomachinery, an extensive experimental and numerical program have been carried out on a 22 mm leading-edge diameter mixed and inward flow radial turbine using a variety of stator designs. The stator was designed using commercial design software, having 9 vanes and the radial clearance (vaneless space) between stator and rotor was 0.5 mm single side, that means the ratio of the stator trailing edge radius to the rotor leading edge radius Rte/rle is 1.0455. Two additional stators (Rte/rle is 1.0182 and 1.0727) were also designed and manufactured. According to the design condition, just like pressure at stator inlet or mass flow rate for all passages, a series of CFD simulations were carried out in order to guide design iterations towards achieving a matched flow capacity for each stator. In this way the variations in the measured stage efficiency could be attributed to the stator passages only, thus allowing direct comparisons to be made. The losses for different radial clearances have been quantified and the variations in the measured and computed efficiency were used to recommend optimum values of Rte/rle. 相似文献
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本文首先介绍了高性能树脂基复合材料在航空工业中的应用现状。然后分析了造成高性能树脂基复合材料成本较高的原因,接着介绍了欧美发达国家在高性能树脂基复合材料低成本化方面的重大计划,最后还介绍了目前常用的几种高性能树脂基复合材料制造技术。 相似文献