There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

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Modern Applied Statistics With S

Intelligent Manufacturing in the Context of Industry 4.0: A Review

Electrocatalytic transformation of carbon dioxide (CO2) and water into chemical feedstocks offers the potential to reduce carbon emissions by shifting the chemical industry away from fossil fuel dependence. We provide a technoeconomic and carbon emission analysis of possible products, offering targets that would need to be met for economically compelling industrial implementation to be achieved. We also provide a comparison of the projected costs and CO2 emissions across electrocatalytic, biocatalytic, and fossil fuel-derived production of chemical feedstocks. We find that for electrosynthesis to become competitive with fossil fuel-derived feedstocks, electrical-to-chemical conversion efficiencies need to reach at least 60%, and renewable electricity prices need to fall below 4 cents per kilowatt-hour. We discuss the possibility of combining electro- and biocatalytic processes, using sequential upgrading of CO2 as a representative case. We describe the technical challenges and economic barriers to marketable electrosynthesized chemicals.

/pdf/what-would-it-take-for-renewably-powered-electrosynthesis-to-11czhlevkp.pdf

What would it take for renewably powered electrosynthesis to displace petrochemical processes

https://absimage.aps.org/image/MAR14/MWS_MAR14-2014-020819.pdf

Van der Waals heterostructures

Micro Cutting Fundamentals And Applications Micro-Cutting: Fundamentals and Applications (Microsystem and Nanotechnology) [Dehong Huo, Kai Cheng, Ronald Pethig, Horacio Espinosa] on Amazon.com. *FREE* shipping on qualifying offers. Micro-Cutting: Fundamentals and Applications comprehensively covers the state of the art research and engineering practice in micro/nano cutting: an area which is becoming increasingly important

Micro-Cutting: Fundamentals and Applications

Electrochemical reduction of CO_2 to ethanol, a clean and renewable liquid fuel with high heating value, is an attractive strategy for global warming mitigation and resource utilization. However, converting CO_2 to ethanol remains great challenge due to the low activity, poor product selectivity and stability of electrocatalysts. Here, the B- and N-co-doped nanodiamond (BND) was reported as an efficient and stable electrode for selective reduction of CO_2 to ethanol. Good ethanol selectivity was achieved on the BND with high Faradaic efficiency of 93.2 % (−1.0 V vs. RHE), which overcame the limitation of low selectivity for multicarbon or high heating value fuels. Its superior performance was mainly originated from the synergistic effect of B and N co-doping, high N content and overpotential for hydrogen evolution. The possible pathway for CO_2 reduction revealed by DFT computation was CO_2→*COOH→*CO→*COCO→*COCH_2OH→*CH_2OCH_2OH→CH_3CH_2OH.

Selective Electrochemical Reduction of Carbon Dioxide to Ethanol on a Boron- and Nitrogen-Co-doped Nanodiamond

1 Introduction
2 Basic Concept and Theory
3 Dynamic Analysis and Control
4 Dynamics Diagnostics: Methods, Equipment and Analysis Tools
5 Tool Design, Tool wear and Tool Life
6 Machining Dynamics in Turning Processes
7 Machining Dynamics in Milling Processes
8 Machining Dynamics in Grinding Processes
9 Materials-induces Vibration in Single Point Diamond Turning
10 Design pf Precision Machines

/pdf/machining-dynamics-fundamentals-applications-and-practices-g6zhrhj4y4.pdf

Machining dynamics: Fundamentals, applications and practices

https://bura.brunel.ac.uk/bitstream/2438/1352/3/Paper-Cheng.pdf

Kai Cheng

Papers

Micro-Cutting: Fundamentals and Applications

Selective Electrochemical Reduction of Carbon Dioxide to Ethanol on a Boron- and Nitrogen-Co-doped Nanodiamond

Machining dynamics: Fundamentals, applications and practices

Design of ultraprecision machine tools with applications to manufacture of miniature and micro components

Fe3N constrained inside C nanocages as an anode for Li-ion batteries through post-synthesis nitridation