Abstract
Filter structures are extensively employed in various hydraulic and geotechnical structures as a key seepage control measure to prevent leakage and erosion. Based on different filter design criteria, several gradation band curve design methods are introduced, thereby offering apparent evidence for filter design. This paper reviews these design methods specified in Chinese and foreign granular filter design standards, their applications, and previous filtration tests; reveals the problems in the previous methods of gradation band curve type; suggests an improved method. This new method uses a new self-healing index to control the upper half of gradation curves, so that it can efficiently choose appropriate filters to avoid potential internal erosion, and make gradation curves more comprehensive and more straightforward. It is verified against previous filtration tests and engineering examples, and the results show that it efficiently discriminates between valid and invalid f
The briefcase-sized SwasthVayu, weighing less than three kg, can be utilised in medical wards, make-shift hospitals, dispensaries, home healthcare operators and homes for treating Covid as well as non-Covid ailments like lung disease, sleep apnea, respiratory weakness etc.ACL
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How to Get TikTok s Shapeshifting Filter as Feature Is Rolled Out to U.S.
On 4/14/21 at 11:42 AM EDT
TikTok s shapeshifting filter is going viral again as the filter has now become available in the U.S. and Canada.
The TikTok filter sees users upload an image of a person and then record themselves. The filter will then transition between the two.
The filter has been used in numerous trends, including one that sees TikTok users share their celebrity lookalikes, and another that sees users prank a family member or friend into thinking the filter has selected a less-than-flattering celebrity doppelganger for them.