Helmet liners are employed to prevent or reduce head injuries caused by impact loads.Liners minimize the collision damage by impact shock attenuation and absorbing the collision energy.In order to improve crashworthiness characteristics of helmet liner, in the present study, an innovative structure designed by a combination of Polyurethane (PU) foa
Expressway traffic event detection at night is essential for improving rescue efficiency and avoiding secondary accidents.Most expressways in China have built a complete Expressway video monitoring system.However, at night, the expressway ORG CREAM OF MUSHROOM SOUP traffic event detection still adopts manual detection, which is inefficient.In this
Communication of the images over the network calls for an approach to ensure security and ownership protection while exchanging images over the network.This paper proposes an improved blind watermarking scheme capable of offering image authentication, protection, and detachment avoidance between the watermark and its corresponding image.The propose
In medical clinical studies, various tests usually relate to the sample size.This paper proposes several methods to calculate sample sizes for a common test of relative risk ratios in stratified bilateral data.Under the prespecified Curler significant level and power, we derive some explicit formulae and an algorithm of the sample size.The sample s