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Dive into the research topics where Li Yining is active.

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Featured researches published by Li Yining.


Chinese Physics Letters | 2012

Sound Velocity in Soap Foams

Wu Gong-Tao; Lü Yong-Jun; Liu Peng-Fei; Li Yining; Shi Qing-Fan

The velocity of sound in soap foams at high gas volume fractions is experimentally studied by using the time difference method. It is found that the sound velocities increase with increasing bubble diameter, and asymptotically approach to the value in air when the diameter is larger than 12.5 mm. We propose a simple theoretical model for the sound propagation in a disordered foam. In this model, the attenuation of a sound wave due to the scattering of the bubble wall is equivalently described as the effect of an additional length. This simplicity reasonably reproduces the sound velocity in foams and the predicted results are in good agreement with the experiments. Further measurements indicate that the increase of frequency markedly slows down the sound velocity, whereas the latter does not display a strong dependence on the solution concentration.


Archive | 2017

Shock attenuation formula rotary seat based on electrodeless regulation and control

Fu Yunfei; Li Yining; Huo Ping; Chen Xiansong


Archive | 2017

Be used for self -driving car steering wheel to turn to device

Fu Yunfei; Liu Pengfei; Li Yining


Archive | 2017

Self -driving car seat with desk

Fu Yunfei; Li Yining; Huo Ping; Chen Xiansong


Archive | 2017

Steering wheel for self -driving car

Fu Yunfei; Liu Pengfei; Li Yining


Archive | 2017

Self -driving car camera convenient to dismantle

Fu Yunfei; Liu Pengfei; Li Yining


Archive | 2017

Flat car seat who lies and have a rest

Fu Yunfei; Li Yining; Huo Ping; Chen Xiansong


Archive | 2017

Camera device for self -driving car with raising and lowering functions

Fu Yunfei; Liu Pengfei; Li Yining


Archive | 2017

Self -driving car rotary seat convenient to use

Fu Yunfei; Li Yining; Huo Ping; Chen Xiansong


Archive | 2017

Adjustable backrest angle's self -driving car seat

Fu Yunfei; Li Yining; Huo Ping; Chen Xiansong

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Liu Peng-Fei

Beijing University of Technology

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Lü Yong-Jun

Northwestern Polytechnical University

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Shi Qing-Fan

Beijing Institute of Technology

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