by analyzing the relationship between speed loss, speed discount in different gradient and grade length, the paper also brings forward the maximum longitudinal gradient and grade length limit.
the positive and negative shows a spatial wave train character vary with the season. the longitudinal gradient of q is weak in summer, but strong and diversity in winter.
the value of longitudinal gradient and grade length limitation were put forward for reference in mountain-expressway design and technique criterion establishment.
该成果可以指导山区高速公路纵断面设计,并为技术标準的制定提供参考依据。
a longitudinal gradient magnetic field was introduced into the discharge space by placing a permanent magnet under the substrate.