Abstract—Noninvasive ultrasound imaging of carotid plaques allows for the development of plaque-image analysis methods associated with the risk of stroke. This paper presents several plaqueimage analysis methods that have been developed over th

四冲程发动机进气阀/排气阀避碰计算分析，进行气门可变正时研究，简单实用-Four-stroke engine of intake/exhaust valve anticollision calculation analysis, was studied by means of variable valve timing, simple and practical