ULTRASTRONG CATALYST-FREE POLYCRYSTALLINE DIAMOND

Ultrastrong catalyst-free polycrystalline diamond

Abstract Diamond is the hardest naturally occurring material found on earth but single crystal diamond is brittle due to the nature of catastrophic cleavage fracture.Polycrystalline diamond compact (PDC) materials are made by high pressure and high temperature (HPHT) technology.PDC materials have been widely used in several industries.Wear resistan

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Analysing the causes of chronic cough: relation to diesel exhaust, ozone, nitrogen oxides, sulphur oxides and other environmental factors

Abstract Air pollution remains a leading cause of many respiratory diseases including chronic cough.Although episodes of incidental, dramatic air pollution are relatively rare, current levels Hot of exposure of pollutants in industrialized and developing countries such as total articles, diesel exhaust particles and common cigarette smoke may be re

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Numerical Simulation on the Hydrodynamic Flow Performance and an Improve Design of a Circulating Water Channel

A Circulating Water Channel (CWC) is an important piece of equipment for hydrodynamic tests in ocean engineering, the quality of the flow field produced by the CWC directly affects the accuracy of the experimental results.Optimizing the key parts of the CWC device can efficiently improve the velocity uniformity and helps to achieve a high-level flo

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