A series of phenanthroline-based ligands have been synthesised and their influence as bidentate nitrogen ligands in heteroleptic [Cu(P^P)(N^N)] photosensitisers in light-driven water reduction has been studied. In this noble-metal-free Cu-Fe-based photocatalytic water reduction system, the structural effects of the nitrogen ligands have been explored, including the steric and electronic effects of substituents at the 2,9- and 4,7-positions of phenanthroline. Ligands were prepared that led to increased hydrogen generation, with turnover numbers (TON ) of up to 1388 being observed. All the new complexes were electrochemically and photophysically characterised. We demonstrate for the first time that the presence of fluorine in nitrogen ligands increases the efficacy of copper complexes in photocatalytic hydrogen production.
Agility of physical manufacturing unit is the competitive advantage in the global manufacturing environment. It is believed that the agility can be realized by dynamically optimization deployment of networked manufacturing resources. To solve this problem, logical manufacturing unit (LMU) and logical manufacturing process (LMP) are proposed and defined to decompose and model networked manufacturing task according to the process of complex part. When selecting manufacturing resources for these manufacturing tasks, many factors should be taken into account. However, manufacturing cost, time to market and manufacturing quality are the most important factors. In this paper, networked manufacturing resources pre-deployment is carried out to find candidate manufacturing resources based on manufacturing resources abilities, such as part family, geometric feature, material type, rough type, dimension range, machining method, precision grade and production type. Then, taking transportation time and cost besides manufacturing time, cost and quality into consideration, the objectives and restrictions of manufacturing resources optimization deployment are analyzed, and manufacturing resources optimization deployment problem is considered as a multi-objectives optimization problem.
Through the data acquisition system of drop impact test impact excitation pulse and in response to a pulse, to reduce or eliminate the experimental process generated interference signal brought influence, the excitation and response signals are Fourier transform (FFT), get the cushing material power spectrum and cross spectrum density value, the time domain signal into frequency domain signal, realize the effective filtering, the frequency domain signal in each frequency through the transfer rate calculation formula of cushing packaging material transient vibration transmitting rate, the transmission rate of the way the process of obtaining description and theoretical analysis.
Under the background of the combination of design and management, the meaning and the role of design management are summarized. With the extensive application of information technology, a product design management system model based on information technology is proposed. The basic frame and the basic ideas of the system model are analyzed. The main technologies used by the new design management system are discussed. In a word, the new product design management system will be strategic resources and an inevitable choice in the process of developing new products
As the economics developing, the traditional design can not meet the changeable customers demand. So the research on methods of new products design becomes valuable. In this paper, the methods of shoes style creation design were discussed. On the base of knowledge, several kinds of methods were put forward to realize shoes style creation design, including exciting creation-intelligence encouragement, expanding creation thought and way, analyzing style, reverse design, series design by analogy and judgment and part modification, reference and association. And a standard for shoes style creation design was also raised. The research mentioned above offers a new thought of shoes style creation design.
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